/* ============================================
   TOOL BOX — Apple-Level Design System
   Light Theme | Immersive Experience
   ============================================ */

:root {
    /* Primary Palette — Calm, trustworthy blue */
    --tb-primary: #0071e3;
    --tb-primary-hover: #0077ed;
    --tb-primary-light: #e8f4fd;
    --tb-primary-soft: rgba(0, 113, 227, 0.08);
    --tb-secondary: #5e5ce6;

    /* BACKWARD COMPATIBILITY ALIASES — All tool files use these */
    --primary: var(--tb-primary);
    --primary-hover: var(--tb-primary-hover);
    --primary-light: var(--tb-primary-light);
    --secondary: var(--tb-secondary);
    --accent: #ff9500;
    --success: #34c759;
    --warning: #ff9f0a;
    --danger: #ff3b30;
    --info: #5ac8fa;
    --bg-primary: var(--tb-bg-elevated);
    --bg-secondary: var(--tb-bg-secondary);
    --bg-tertiary: var(--tb-bg-tertiary);
    --bg-elevated: var(--tb-bg-elevated);
    --bg-sidebar: var(--tb-bg-sidebar);
    --bg-hover: var(--tb-bg-hover);
    --bg-active: var(--tb-bg-active);
    --text-primary: var(--tb-text);
    --text-secondary: var(--tb-text-secondary);
    --text-tertiary: var(--tb-text-tertiary);
    --text-inverse: var(--tb-text-inverse);
    --text-muted: var(--tb-text-muted);
    --border: var(--tb-border);
    --border-light: var(--tb-border-light);
    --shadow-sm: var(--tb-shadow-sm);
    --shadow-md: var(--tb-shadow-md);
    --shadow-lg: var(--tb-shadow-lg);
    --shadow-xl: var(--tb-shadow-xl);
    --radius-sm: var(--tb-radius-sm);
    --radius-md: var(--tb-radius-md);
    --radius-lg: var(--tb-radius-lg);
    --radius-xl: var(--tb-radius-xl);
    --radius-full: var(--tb-radius-full);
    --font-family: var(--tb-font);
    --transition: var(--tb-transition);
    --transition-fast: var(--tb-transition-fast);

    /* Semantic Colors */
    --tb-success: #34c759;
    --tb-success-soft: rgba(52, 199, 89, 0.1);
    --tb-warning: #ff9f0a;
    --tb-warning-soft: rgba(255, 159, 10, 0.1);
    --tb-danger: #ff3b30;
    --tb-danger-soft: rgba(255, 59, 48, 0.1);
    --tb-info: #5ac8fa;
    --tb-info-soft: rgba(90, 200, 250, 0.1);

    /* Backgrounds — Layered depth */
    --tb-bg: #f5f7fa;
    --tb-bg-elevated: #ffffff;
    --tb-bg-secondary: #f0f2f5;
    --tb-bg-tertiary: #fafbfc;
    --tb-bg-sidebar: rgba(251, 251, 253, 0.85);
    --tb-bg-hover: rgba(0, 0, 0, 0.035);
    --tb-bg-active: rgba(0, 113, 227, 0.08);

    /* Text */
    --tb-text: #1d1d1f;
    --tb-text-secondary: #6e6e73;
    --tb-text-tertiary: #a1a1a6;
    --tb-text-inverse: #ffffff;
    --tb-text-muted: #86868b;

    /* Borders */
    --tb-border: rgba(0, 0, 0, 0.06);
    --tb-border-light: rgba(0, 0, 0, 0.04);
    --tb-border-focus: rgba(0, 113, 227, 0.3);

    /* Shadows — Soft, layered */
    --tb-shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.03);
    --tb-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
    --tb-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.05), 0 1px 4px rgba(0, 0, 0, 0.03);
    --tb-shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.07), 0 4px 12px rgba(0, 0, 0, 0.04);
    --tb-shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.09), 0 8px 20px rgba(0, 0, 0, 0.05);
    --tb-shadow-glow: 0 0 0 3px var(--tb-border-focus);

    /* Radius */
    --tb-radius-sm: 10px;
    --tb-radius-md: 14px;
    --tb-radius-lg: 20px;
    --tb-radius-xl: 28px;
    --tb-radius-full: 9999px;

    /* Typography */
    --tb-font: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;

    /* Transitions */
    --tb-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --tb-transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --tb-transition-bounce: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    --tb-spring: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);

    /* Spacing Scale */
    --tb-space-1: 4px;
    --tb-space-2: 8px;
    --tb-space-3: 12px;
    --tb-space-4: 16px;
    --tb-space-5: 20px;
    --tb-space-6: 24px;
    --tb-space-8: 32px;
    --tb-space-10: 40px;
    --tb-space-12: 48px;
    --tb-space-16: 64px;
}

/* ============================================
   BASE
   ============================================ */

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--tb-font);
    background: linear-gradient(180deg, #f8fafc 0%, #f5f7fa 40%, #f0f2f5 100%);
    background-attachment: fixed;
    color: var(--tb-text);
    line-height: 1.5;
    overflow-x: hidden;
    font-size: 14px;
}

::selection {
    background: var(--tb-primary-soft);
    color: var(--tb-primary);
}

/* ============================================
   LAYOUT
   ============================================ */

#app {
    display: flex;
    min-height: 100vh;
}

/* ---- Sidebar ---- */
.sidebar {
    width: 272px;
    background: var(--tb-bg-sidebar);
    backdrop-filter: blur(24px) saturate(1.8);
    -webkit-backdrop-filter: blur(24px) saturate(1.8);
    border-right: 1px solid var(--tb-border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 100;
    transition: var(--tb-transition);
}

.sidebar.collapsed {
    width: 68px;
}

.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.2);
    backdrop-filter: blur(4px);
    z-index: 99;
    opacity: 0;
    visibility: hidden;
    transition: var(--tb-transition);
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
}

.sidebar-header {
    padding: var(--tb-space-5) var(--tb-space-5) var(--tb-space-4);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 16px;
    text-decoration: none;
    transition: var(--tb-transition-fast);
}

.logo:hover { opacity: 0.8; }

.logo-icon-fa {
    font-size: 20px;
    color: #0071e3;
    line-height: 1;
    transition: var(--tb-transition-bounce);
}

.logo:hover .logo-icon-fa {
    transform: scale(1.15) rotate(-5deg);
    color: #5e5ce6;
}

.logo:hover .logo-icon {
    transform: scale(1.05) rotate(-3deg);
}

.logo-text {
    font-size: 18px;
    font-weight: 700;
    color: var(--tb-text);
    letter-spacing: -0.4px;
    transition: var(--tb-transition);
}

.logo-text-blue {
    color: var(--tb-primary);
}

.sidebar.collapsed .logo-text { display: none; }

.sidebar-toggle {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    border-radius: var(--tb-radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--tb-text-tertiary);
    transition: var(--tb-transition-fast);
}

.sidebar-toggle:hover {
    background: var(--tb-bg-hover);
    color: var(--tb-primary);
}

.sidebar-search-trigger {
    margin: 0 var(--tb-space-5) var(--tb-space-4);
    padding: var(--tb-space-3) var(--tb-space-4);
    background: var(--tb-bg-secondary);
    border-radius: var(--tb-radius-md);
    display: flex;
    align-items: center;
    gap: var(--tb-space-3);
    color: var(--tb-text-tertiary);
    font-size: 13px;
    cursor: pointer;
    transition: var(--tb-transition-fast);
    border: 1px solid transparent;
    flex-shrink: 0;
}

.sidebar-search-trigger:hover {
    background: var(--tb-bg-hover);
    border-color: var(--tb-border);
    color: var(--tb-text-secondary);
}

.sidebar-search-trigger i { font-size: 12px; }

.sidebar-search-trigger span { flex: 1; }

.sidebar-search-trigger kbd {
    font-family: var(--tb-font);
    font-size: 10px;
    padding: 2px 6px;
    background: var(--tb-bg-elevated);
    border-radius: 4px;
    border: 1px solid var(--tb-border);
    color: var(--tb-text-tertiary);
}

.sidebar.collapsed .sidebar-search-trigger { display: none; }

.sidebar-scroll {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 0 var(--tb-space-3);
}

.sidebar-scroll::-webkit-scrollbar { width: 3px; }
.sidebar-scroll::-webkit-scrollbar-thumb {
    background: transparent;
    border-radius: var(--tb-radius-full);
}
.sidebar-scroll:hover::-webkit-scrollbar-thumb { background: var(--tb-border); }

.sidebar-section { margin-bottom: var(--tb-space-4); }

.sidebar-section-title {
    padding: var(--tb-space-3) var(--tb-space-4);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: var(--tb-text-tertiary);
}

.sidebar-favorites,
.sidebar-recent {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.sidebar-footer {
    padding: var(--tb-space-4) var(--tb-space-5);
    border-top: 1px solid var(--tb-border-light);
    font-size: 11px;
    color: var(--tb-text-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--tb-space-2);
    flex-shrink: 0;
}

.sidebar-footer .dot {
    width: 3px;
    height: 3px;
    border-radius: var(--tb-radius-full);
    background: var(--tb-text-tertiary);
    opacity: 0.5;
}

.sidebar.collapsed .sidebar-footer span:not(:first-child) { display: none; }

/* ---- Sidebar Navigation ---- */
.sidebar-nav { display: flex; flex-direction: column; gap: 2px; }

.nav-category { border-radius: var(--tb-radius-md); }

.nav-category-header {
    display: flex;
    align-items: center;
    gap: var(--tb-space-3);
    padding: var(--tb-space-3) var(--tb-space-4);
    cursor: pointer;
    border-radius: var(--tb-radius-md);
    transition: var(--tb-transition-fast);
    user-select: none;
}

.nav-category-header:hover { background: var(--tb-bg-hover); }

.nav-category-header.active { background: var(--tb-bg-active); color: var(--tb-primary); }

.nav-category-header .cat-icon {
    width: 28px;
    height: 28px;
    border-radius: var(--tb-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    flex-shrink: 0;
    background: var(--tb-bg-secondary);
    color: var(--tb-text-secondary);
    transition: var(--tb-transition-fast);
}

.nav-category-header.active .cat-icon {
    background: linear-gradient(135deg, var(--tb-primary), #42a5f5);
    color: white;
    box-shadow: 0 2px 6px rgba(0, 113, 227, 0.2);
}

.nav-category-header .cat-name {
    font-size: 13px;
    font-weight: 500;
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nav-category-header .cat-chevron {
    font-size: 10px;
    color: var(--tb-text-tertiary);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-category.expanded .cat-chevron { transform: rotate(180deg); }

.nav-tools {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-category.expanded .nav-tools { max-height: 700px; }

.nav-tool {
    display: flex;
    align-items: center;
    gap: var(--tb-space-3);
    padding: 7px var(--tb-space-4) 7px 46px;
    cursor: pointer;
    border-radius: var(--tb-radius-md);
    transition: var(--tb-transition-fast);
    font-size: 12.5px;
    color: var(--tb-text-secondary);
    text-decoration: none;
    position: relative;
}

.nav-tool::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    width: 5px;
    height: 5px;
    border-radius: var(--tb-radius-full);
    background: var(--tb-border);
    transition: var(--tb-transition-fast);
}

.nav-tool:hover {
    background: var(--tb-bg-hover);
    color: var(--tb-text);
}

.nav-tool:hover::before { background: var(--tb-primary); }

.nav-tool.active {
    background: var(--tb-bg-active);
    color: var(--tb-primary);
    font-weight: 500;
}

.nav-tool.active::before {
    background: var(--tb-primary);
    box-shadow: 0 0 0 2px var(--tb-primary-soft);
}

.sidebar.collapsed .nav-tool span,
.sidebar.collapsed .cat-name,
.sidebar.collapsed .cat-chevron,
.sidebar.collapsed .sidebar-section-title,
.sidebar.collapsed .sidebar-section { display: none; }

/* ---- Main Content ---- */
.main-content {
    flex: 1;
    margin-left: 272px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: var(--tb-transition);
}

.sidebar.collapsed + .sidebar-overlay + .main-content { margin-left: 68px; }

/* ---- Top Bar ---- */
.top-bar {
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(20px) saturate(1.5);
    -webkit-backdrop-filter: blur(20px) saturate(1.5);
    border-bottom: 1px solid var(--tb-border-light);
    padding: 0 var(--tb-space-8);
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 50;
}

.top-bar-left {
    display: flex;
    align-items: center;
    gap: var(--tb-space-4);
}

.mobile-menu-btn {
    display: none;
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    border-radius: var(--tb-radius-sm);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    color: var(--tb-text-secondary);
}

.top-bar-right { display: flex; align-items: center; gap: var(--tb-space-2); }

.icon-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--tb-radius-full);
    border: none;
    background: transparent;
    color: var(--tb-text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--tb-transition-fast);
    font-size: 14px;
}

.icon-btn:hover {
    background: var(--tb-bg-hover);
    color: var(--tb-primary);
}

/* ---- Breadcrumb ---- */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--tb-space-2);
    font-size: 13px;
    color: var(--tb-text-secondary);
}

.breadcrumb a {
    color: var(--tb-text-secondary);
    text-decoration: none;
    transition: var(--tb-transition-fast);
    padding: 4px 8px;
    border-radius: var(--tb-radius-sm);
}

.breadcrumb a:hover {
    color: var(--tb-primary);
    background: var(--tb-bg-hover);
}

.breadcrumb .sep {
    color: var(--tb-text-tertiary);
    font-size: 11px;
}

.breadcrumb .current {
    color: var(--tb-text);
    font-weight: 500;
    padding: 4px 8px;
}

/* ---- Content Area ---- */
.content-wrapper {
    flex: 1;
    padding: var(--tb-space-8);
}

.content-area {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* ============================================
   SEARCH OVERLAY (Command Palette)
   ============================================ */

.search-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.25);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 120px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
}

.search-overlay.active {
    opacity: 1;
    visibility: visible;
}

.search-modal {
    width: 560px;
    max-width: 90vw;
    background: var(--tb-bg-elevated);
    border-radius: var(--tb-radius-xl);
    box-shadow: var(--tb-shadow-xl);
    overflow: hidden;
    transform: translateY(-8px) scale(0.98);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.search-overlay.active .search-modal {
    transform: translateY(0) scale(1);
}

.search-input-wrap {
    display: flex;
    align-items: center;
    gap: var(--tb-space-3);
    padding: var(--tb-space-4) var(--tb-space-5);
    border-bottom: 1px solid var(--tb-border-light);
}

.search-input-wrap i {
    color: var(--tb-text-tertiary);
    font-size: 16px;
}

.search-input-wrap input {
    flex: 1;
    border: none;
    background: none;
    outline: none;
    font-family: var(--tb-font);
    font-size: 15px;
    color: var(--tb-text);
}

.search-input-wrap input::placeholder { color: var(--tb-text-tertiary); }

.search-esc {
    font-family: var(--tb-font);
    font-size: 11px;
    padding: 3px 8px;
    background: var(--tb-bg-secondary);
    border-radius: 6px;
    border: 1px solid var(--tb-border);
    color: var(--tb-text-tertiary);
}

.search-results {
    max-height: 400px;
    overflow-y: auto;
    padding: var(--tb-space-2);
}

.search-category-title {
    padding: var(--tb-space-3) var(--tb-space-4);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--tb-text-tertiary);
}

.search-result-item {
    display: flex;
    align-items: center;
    gap: var(--tb-space-3);
    padding: var(--tb-space-3) var(--tb-space-4);
    border-radius: var(--tb-radius-md);
    cursor: pointer;
    transition: var(--tb-transition-fast);
    color: var(--tb-text);
    text-decoration: none;
}

.search-result-item:hover,
.search-result-item.focused {
    background: var(--tb-bg-hover);
}

.search-result-item.focused {
    background: var(--tb-bg-active);
}

.search-result-item .sr-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--tb-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    flex-shrink: 0;
    background: var(--tb-bg-secondary);
    color: var(--tb-text-secondary);
}

.search-result-item .sr-info { flex: 1; min-width: 0; }

.search-result-item .sr-name {
    font-size: 13px;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.search-result-item .sr-desc {
    font-size: 12px;
    color: var(--tb-text-tertiary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.search-result-item .sr-cat {
    font-size: 11px;
    color: var(--tb-text-tertiary);
    background: var(--tb-bg-secondary);
    padding: 2px 8px;
    border-radius: var(--tb-radius-full);
}

.search-empty {
    text-align: center;
    padding: var(--tb-space-10);
    color: var(--tb-text-tertiary);
}

.search-empty i {
    font-size: 32px;
    margin-bottom: var(--tb-space-4);
    display: block;
    opacity: 0.5;
}

/* ============================================
   HOME / DASHBOARD
   ============================================ */

.hero-section {
    text-align: center;
    padding: var(--tb-space-12) 0 var(--tb-space-10);
    position: relative;
}

.hero-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--tb-primary), #42a5f5);
    border-radius: var(--tb-radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--tb-space-6);
    color: white;
    box-shadow: 0 8px 32px rgba(0, 113, 227, 0.25);
    animation: heroFloat 4s ease-in-out infinite;
}

.hero-icon svg { width: 36px; height: 36px; }

@keyframes heroFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.hero-section h1 {
    font-size: 40px;
    font-weight: 800;
    letter-spacing: -1.2px;
    margin-bottom: var(--tb-space-3);
    line-height: 1.1;
}

.hero-section p {
    font-size: 17px;
    color: var(--tb-text-secondary);
    max-width: 460px;
    margin: 0 auto var(--tb-space-8);
    line-height: 1.6;
    font-weight: 400;
}

.hero-search {
    max-width: 520px;
    margin: 0 auto var(--tb-space-10);
    position: relative;
}

.hero-search input {
    width: 100%;
    padding: 16px 52px 16px 20px;
    border: 1px solid var(--tb-border);
    border-radius: var(--tb-radius-full);
    font-family: var(--tb-font);
    font-size: 15px;
    background: var(--tb-bg-elevated);
    color: var(--tb-text);
    outline: none;
    transition: var(--tb-transition);
    box-shadow: var(--tb-shadow-sm);
}

.hero-search input:focus {
    border-color: var(--tb-primary);
    box-shadow: var(--tb-shadow-glow), var(--tb-shadow-md);
}

.hero-search input::placeholder { color: var(--tb-text-tertiary); }

.hero-search i {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--tb-text-tertiary);
    font-size: 14px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--tb-space-10);
    margin-bottom: var(--tb-space-12);
}

.hero-stat {
    text-align: center;
}

.hero-stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--tb-text);
    letter-spacing: -0.5px;
}

.hero-stat-label {
    font-size: 13px;
    color: var(--tb-text-tertiary);
    margin-top: 2px;
}

/* ---- Hero Badge ---- */
.hero-badge {
    margin-bottom: var(--tb-space-6);
}

.hero-badge-pill {
    display: inline-block;
    padding: 5px 14px;
    background: rgba(0, 113, 227, 0.06);
    border: 1px solid rgba(0, 113, 227, 0.12);
    border-radius: 100px;
    font-size: 11px;
    font-weight: 600;
    color: var(--tb-primary);
    letter-spacing: 0.4px;
}

/* ---- Hero Heading ---- */
.hero-section h1 .hero-accent {
    color: var(--tb-primary);
}

/* ---- Hero Description ---- */
.hero-desc {
    font-size: 16px;
    color: var(--tb-text-secondary);
    max-width: 480px;
    margin: 0 auto var(--tb-space-8);
    line-height: 1.6;
    font-weight: 400;
}

/* ---- Hero Trust Badges ---- */
.hero-trust {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    margin-bottom: var(--tb-space-10);
}

.hero-trust-item {
    font-size: 12px;
    color: var(--tb-text-tertiary);
    font-weight: 400;
    letter-spacing: 0.2px;
}

@media (max-width: 768px) {
    .hero-trust {
        gap: 16px;
        flex-wrap: wrap;
    }
    .hero-trust-item {
        font-size: 11px;
    }
    .hero-desc {
        font-size: 15px;
        padding: 0 var(--tb-space-4);
    }
    .hero-section h1 {
        font-size: 32px;
    }
    .hero-section h1 .hero-accent {
        display: block;
    }
}

@media (max-width: 480px) {
    .hero-trust {
        gap: 12px;
    }
    .hero-section h1 {
        font-size: 28px;
    }
}

/* ---- Section Title ---- */
.section-title {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: var(--tb-text-tertiary);
    margin-bottom: var(--tb-space-5);
    display: flex;
    align-items: center;
    gap: var(--tb-space-3);
}

/* ---- Recent / Favorites Bar ---- */
.recent-bar,
.favorites-bar {
    margin-bottom: var(--tb-space-10);
}

.chip-scroll {
    display: flex;
    gap: var(--tb-space-3);
    overflow-x: auto;
    padding-bottom: var(--tb-space-2);
    scrollbar-width: none;
}

.chip-scroll::-webkit-scrollbar { display: none; }

.tool-chip {
    display: flex;
    align-items: center;
    gap: var(--tb-space-3);
    padding: var(--tb-space-3) var(--tb-space-4);
    background: var(--tb-bg-elevated);
    border: 1px solid var(--tb-border-light);
    border-radius: var(--tb-radius-full);
    cursor: pointer;
    transition: var(--tb-transition-fast);
    white-space: nowrap;
    text-decoration: none;
    color: var(--tb-text);
    font-size: 13px;
    font-weight: 500;
    flex-shrink: 0;
}

.tool-chip:hover {
    border-color: var(--tb-primary);
    box-shadow: var(--tb-shadow-sm);
    transform: translateY(-1px);
}

.tool-chip i {
    color: var(--tb-primary);
    font-size: 12px;
}

/* ---- Categories Grid ---- */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--tb-space-5);
}

.category-card {
    background: var(--tb-bg-elevated);
    border-radius: var(--tb-radius-lg);
    padding: var(--tb-space-6);
    box-shadow: var(--tb-shadow-xs);
    border: 1px solid var(--tb-border-light);
    cursor: pointer;
    transition: var(--tb-transition);
    position: relative;
    overflow: hidden;
}

.category-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--cat-color, var(--tb-primary)), transparent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.category-card:hover {
    box-shadow: var(--tb-shadow-md);
    transform: translateY(-3px);
}

.category-card:hover::after {
    transform: scaleX(1);
}

.cat-card-header {
    display: flex;
    align-items: center;
    gap: var(--tb-space-4);
    margin-bottom: var(--tb-space-5);
}

.cat-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--tb-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
    background: linear-gradient(135deg, var(--cat-color, var(--tb-primary))15, var(--cat-color, var(--tb-primary))08);
    color: var(--cat-color, var(--tb-primary));
}

.cat-card-info h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 2px;
}

.cat-card-info span {
    font-size: 13px;
    color: var(--tb-text-tertiary);
}

.cat-card-tools {
    display: flex;
    flex-wrap: wrap;
    gap: var(--tb-space-2);
}

.cat-card-tag {
    background: var(--tb-bg-secondary);
    padding: 5px 12px;
    border-radius: var(--tb-radius-full);
    font-size: 12px;
    color: var(--tb-text-secondary);
    transition: var(--tb-transition-fast);
}

.category-card:hover .cat-card-tag {
    background: var(--tb-primary-soft);
    color: var(--tb-primary);
}

/* ---- Popular Tools Grid ---- */
.popular-tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: var(--tb-space-4);
}

.popular-tool-card {
    background: var(--tb-bg-elevated);
    border-radius: var(--tb-radius-lg);
    padding: var(--tb-space-5);
    box-shadow: var(--tb-shadow-xs);
    border: 1px solid var(--tb-border-light);
    cursor: pointer;
    transition: var(--tb-transition);
    display: flex;
    align-items: center;
    gap: var(--tb-space-4);
    position: relative;
}

.popular-tool-card:hover {
    box-shadow: var(--tb-shadow-md);
    transform: translateY(-2px);
    border-color: rgba(0, 113, 227, 0.15);
}

.popular-tool-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--tb-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
    background: linear-gradient(135deg, var(--cat-color, var(--tb-primary))15, var(--cat-color, var(--tb-primary))08);
    color: var(--cat-color, var(--tb-primary));
}

.popular-tool-info {
    flex: 1;
    min-width: 0;
}

.popular-tool-info h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 2px;
    color: var(--tb-text);
}

.popular-tool-info span {
    font-size: 12px;
    color: var(--tb-text-tertiary);
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.popular-tool-arrow {
    color: var(--tb-text-tertiary);
    font-size: 12px;
    opacity: 0;
    transition: var(--tb-transition-fast);
}

.popular-tool-card:hover .popular-tool-arrow {
    opacity: 1;
    color: var(--tb-primary);
    transform: translateX(3px);
}

/* ---- Why Choose Section ---- */
.why-section {
    margin-top: 56px;
    padding: 40px 0;
}

.why-heading {
    text-align: center;
    font-size: 22px;
    font-weight: 700;
    color: var(--tb-text);
    margin-bottom: 32px;
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--tb-space-5);
}

.why-card {
    text-align: center;
    padding: var(--tb-space-5);
}

.why-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--tb-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin: 0 auto var(--tb-space-4);
    background: linear-gradient(135deg, var(--tb-primary-soft), rgba(0,113,227,0.06));
    color: var(--tb-primary);
}

.why-card h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--tb-text);
}

.why-card p {
    font-size: 13px;
    color: var(--tb-text-secondary);
    line-height: 1.6;
}

/* ============================================
   CATEGORY PAGE
   ============================================ */

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--tb-space-4);
}

.tool-card {
    background: var(--tb-bg-elevated);
    border-radius: var(--tb-radius-lg);
    padding: var(--tb-space-6);
    box-shadow: var(--tb-shadow-xs);
    border: 1px solid var(--tb-border-light);
    cursor: pointer;
    transition: var(--tb-transition);
    text-align: center;
    position: relative;
    text-decoration: none;
    color: var(--tb-text);
}

.tool-card:hover {
    box-shadow: var(--tb-shadow-md);
    transform: translateY(-2px);
    border-color: rgba(0, 113, 227, 0.15);
}

.tool-card-fav {
    position: absolute;
    top: var(--tb-space-3);
    right: var(--tb-space-3);
    width: 28px;
    height: 28px;
    border-radius: var(--tb-radius-full);
    border: none;
    background: transparent;
    color: var(--tb-text-tertiary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    opacity: 0;
    transition: var(--tb-transition-fast);
    z-index: 2;
}

.tool-card:hover .tool-card-fav { opacity: 1; }

.tool-card-fav:hover { color: var(--tb-warning); background: var(--tb-warning-soft); }

.tool-card-fav.active { opacity: 1; color: var(--tb-warning); }

.tool-card-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--tb-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin: 0 auto var(--tb-space-4);
    background: linear-gradient(135deg, var(--cat-color, var(--tb-primary))12, var(--cat-color, var(--tb-primary))06);
    color: var(--cat-color, var(--tb-primary));
    transition: var(--tb-transition-bounce);
}

.tool-card:hover .tool-card-icon {
    transform: scale(1.08);
}

.tool-card h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 6px;
}

.tool-card p {
    font-size: 12.5px;
    color: var(--tb-text-secondary);
    line-height: 1.5;
}

/* ============================================
   TOOL PAGE
   ============================================ */

.tool-page {
    animation: pageEnter 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes pageEnter {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.tool-header {
    display: flex;
    align-items: center;
    gap: var(--tb-space-5);
    margin-bottom: var(--tb-space-8);
    padding-bottom: var(--tb-space-6);
    border-bottom: 1px solid var(--tb-border);
}

.tool-header-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--tb-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
    background: linear-gradient(135deg, var(--cat-color, var(--tb-primary)), var(--cat-color, var(--tb-primary))dd);
    color: white;
    box-shadow: 0 4px 16px var(--cat-color, var(--tb-primary))30;
}

.tool-header-info h1 {
    font-size: 26px;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 4px;
}

.tool-header-info p {
    font-size: 14px;
    color: var(--tb-text-secondary);
    max-width: 600px;
}

.tool-workspace, .tool-container {
    background: var(--tb-bg-elevated);
    border-radius: var(--tb-radius-xl);
    padding: var(--tb-space-8);
    box-shadow: var(--tb-shadow-xs);
    border: 1px solid var(--tb-border-light);
}

.tool-actions {
    display: flex;
    gap: var(--tb-space-3);
    margin-top: var(--tb-space-6);
    flex-wrap: wrap;
}

/* ---- Tabs ---- */
.tool-tabs {
    display: flex;
    gap: var(--tb-space-1);
    margin-bottom: var(--tb-space-6);
    border-bottom: 1px solid var(--tb-border-light);
    padding-bottom: 0;
}

.tool-tab {
    padding: var(--tb-space-3) var(--tb-space-4);
    border: none;
    background: none;
    font-family: var(--tb-font);
    font-size: 14px;
    font-weight: 500;
    color: var(--tb-text-secondary);
    cursor: pointer;
    border-radius: var(--tb-radius-sm) var(--tb-radius-sm) 0 0;
    position: relative;
    transition: var(--tb-transition-fast);
    margin-bottom: -1px;
}

.tool-tab:hover { color: var(--tb-text); }

.tool-tab.active {
    color: var(--tb-primary);
    font-weight: 600;
}

.tool-tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 8px;
    right: 8px;
    height: 2.5px;
    background: var(--tb-primary);
    border-radius: var(--tb-radius-full) var(--tb-radius-full) 0 0;
}

/* ============================================
   FORM ELEMENTS
   ============================================ */

.form-group {
    margin-bottom: var(--tb-space-5);
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: var(--tb-space-2);
    color: var(--tb-text);
}

.form-group .form-hint {
    font-size: 12px;
    color: var(--tb-text-tertiary);
    margin-top: var(--tb-space-1);
}

input[type="text"],
input[type="email"],
input[type="number"],
input[type="password"],
input[type="tel"],
input[type="url"],
input[type="date"],
input[type="time"],
textarea,
select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--tb-border);
    border-radius: var(--tb-radius-md);
    font-family: var(--tb-font);
    font-size: 14px;
    color: var(--tb-text);
    background: var(--tb-bg-elevated);
    transition: var(--tb-transition-fast);
    outline: none;
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--tb-primary);
    box-shadow: var(--tb-shadow-glow);
}

input::placeholder,
textarea::placeholder { color: var(--tb-text-tertiary); }

textarea {
    resize: vertical;
    min-height: 120px;
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2386868b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 38px;
}

select:hover {
    border-color: var(--tb-text-tertiary);
}

select option {
    padding: 10px 14px;
    font-size: 14px;
    background: var(--tb-bg-elevated);
    color: var(--tb-text);
}

select option:checked {
    background: var(--tb-primary-soft);
    color: var(--tb-primary);
    font-weight: 500;
}

select:focus option:hover {
    background: var(--tb-bg-hover);
}

/* Form row */
.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--tb-space-4);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--tb-space-2);
    padding: 11px 22px;
    border-radius: var(--tb-radius-md);
    font-family: var(--tb-font);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--tb-transition-fast);
    border: none;
    outline: none;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--tb-primary), #3395ff);
    color: white;
    box-shadow: 0 2px 12px rgba(0, 113, 227, 0.25);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 18px rgba(0, 113, 227, 0.35);
}

.btn-primary:active { transform: translateY(0); }

.btn-secondary {
    background: var(--tb-bg-secondary);
    color: var(--tb-text);
    border: 1px solid var(--tb-border);
}

.btn-secondary:hover {
    background: var(--tb-bg-hover);
    border-color: var(--tb-border);
}

.btn-danger {
    background: linear-gradient(135deg, #ff3b30, #ff6b6b);
    color: white;
    box-shadow: 0 2px 10px rgba(255, 59, 48, 0.2);
}

.btn-success {
    background: linear-gradient(135deg, #34c759, #30d158);
    color: white;
    box-shadow: 0 2px 10px rgba(52, 199, 89, 0.2);
}

.btn-outline {
    background: transparent;
    color: var(--tb-primary);
    border: 1.5px solid var(--tb-primary);
}

.btn-outline:hover { background: var(--tb-primary-soft); }

.btn-ghost {
    background: transparent;
    color: var(--tb-text-secondary);
}

.btn-ghost:hover { background: var(--tb-bg-hover); color: var(--tb-text); }

.btn-lg { padding: 14px 28px; font-size: 15px; border-radius: var(--tb-radius-lg); }
.btn-sm { padding: 7px 14px; font-size: 12.5px; }
.btn-icon { padding: 10px; width: 40px; height: 40px; }

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

/* ============================================
   DROPZONE
   ============================================ */

.dropzone {
    border: 2px dashed var(--tb-border);
    border-radius: var(--tb-radius-xl);
    padding: 56px 32px;
    text-align: center;
    cursor: pointer;
    transition: var(--tb-transition);
    background: var(--tb-bg-tertiary);
    position: relative;
    overflow: hidden;
}

.dropzone:hover,
.dropzone.dragover {
    border-color: var(--tb-primary);
    background: var(--tb-primary-soft);
    transform: scale(1.005);
}

.dropzone-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--tb-radius-lg);
    background: linear-gradient(135deg, var(--tb-primary), #42a5f5);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--tb-space-4);
    color: white;
    font-size: 24px;
    box-shadow: 0 4px 16px rgba(0, 113, 227, 0.2);
    transition: var(--tb-transition-bounce);
}

.dropzone:hover .dropzone-icon {
    transform: scale(1.08) rotate(-4deg);
}

.dropzone h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: var(--tb-space-2);
}

.dropzone p {
    font-size: 13px;
    color: var(--tb-text-secondary);
    margin-bottom: var(--tb-space-4);
}

.dropzone .btn { position: relative; z-index: 2; }

.dropzone input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
    z-index: 1;
}

/* ============================================
   FILE LIST
   ============================================ */

.file-list { margin-top: var(--tb-space-5); }

.file-item {
    display: flex;
    align-items: center;
    gap: var(--tb-space-4);
    padding: var(--tb-space-4);
    background: var(--tb-bg-tertiary);
    border-radius: var(--tb-radius-md);
    margin-bottom: var(--tb-space-2);
    border: 1px solid var(--tb-border-light);
    transition: var(--tb-transition-fast);
}

.file-item:hover { box-shadow: var(--tb-shadow-xs); }

.file-item-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--tb-radius-sm);
    background: var(--tb-bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
    color: var(--tb-primary);
}

.file-item-info { flex: 1; min-width: 0; }

.file-item-info .file-name {
    font-weight: 500;
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-item-info .file-meta {
    font-size: 12px;
    color: var(--tb-text-tertiary);
    margin-top: 1px;
}

.file-item-actions {
    display: flex;
    gap: var(--tb-space-2);
}

.file-item-actions button {
    width: 28px;
    height: 28px;
    border-radius: var(--tb-radius-sm);
    border: none;
    background: var(--tb-bg-secondary);
    color: var(--tb-text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--tb-transition-fast);
    font-size: 12px;
}

.file-item-actions button:hover {
    background: var(--tb-danger);
    color: white;
}

/* ============================================
   PROGRESS BAR
   ============================================ */

.progress-container { margin-top: var(--tb-space-5); }

.progress-bar {
    height: 6px;
    background: var(--tb-bg-secondary);
    border-radius: var(--tb-radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--tb-primary), #42a5f5);
    border-radius: var(--tb-radius-full);
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    width: 0%;
    position: relative;
    overflow: hidden;
}

.progress-fill::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: progressShimmer 1.5s infinite;
}

@keyframes progressShimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.progress-text {
    font-size: 12px;
    color: var(--tb-text-secondary);
    margin-top: var(--tb-space-2);
    text-align: center;
}

/* ============================================
   RESULT / OUTPUT AREA
   ============================================ */

.result-area {
    margin-top: var(--tb-space-6);
    padding: var(--tb-space-6);
    background: var(--tb-bg-tertiary);
    border-radius: var(--tb-radius-xl);
    border: 1px solid var(--tb-border-light);
    display: none;
}

.result-area.visible {
    display: block;
    animation: pageEnter 0.4s ease;
}

.result-area h3 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: var(--tb-space-4);
    display: flex;
    align-items: center;
    gap: var(--tb-space-2);
}

.result-area h3 i { color: var(--tb-success); }

/* ============================================
   EMPTY STATE
   ============================================ */

.empty-state {
    text-align: center;
    padding: var(--tb-space-12) var(--tb-space-6);
    color: var(--tb-text-tertiary);
}

.empty-state-icon {
    width: 72px;
    height: 72px;
    border-radius: var(--tb-radius-xl);
    background: var(--tb-bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--tb-space-5);
    font-size: 28px;
    color: var(--tb-text-tertiary);
}

.empty-state h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--tb-text);
    margin-bottom: var(--tb-space-2);
}

.empty-state p {
    font-size: 14px;
    max-width: 360px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ============================================
   SKELETON LOADING
   ============================================ */

.skeleton {
    background: linear-gradient(90deg, var(--tb-bg-secondary) 25%, var(--tb-bg-tertiary) 50%, var(--tb-bg-secondary) 75%);
    background-size: 200% 100%;
    animation: skeletonShimmer 1.5s infinite;
    border-radius: var(--tb-radius-md);
}

@keyframes skeletonShimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-text { height: 14px; margin-bottom: var(--tb-space-2); }
.skeleton-title { height: 20px; width: 60%; margin-bottom: var(--tb-space-3); }
.skeleton-circle { width: 48px; height: 48px; border-radius: var(--tb-radius-full); }
.skeleton-card { height: 120px; border-radius: var(--tb-radius-lg); }

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */

#toastContainer {
    position: fixed;
    top: var(--tb-space-5);
    right: var(--tb-space-5);
    z-index: 3000;
    display: flex;
    flex-direction: column;
    gap: var(--tb-space-3);
}

.toast {
    background: var(--tb-bg-elevated);
    border-radius: var(--tb-radius-lg);
    padding: var(--tb-space-4) var(--tb-space-5);
    box-shadow: var(--tb-shadow-lg);
    border: 1px solid var(--tb-border-light);
    display: flex;
    align-items: center;
    gap: var(--tb-space-3);
    min-width: 320px;
    max-width: 420px;
    animation: toastIn 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast.toast-out {
    animation: toastOut 0.3s cubic-bezier(0.4, 0, 1, 1) forwards;
}

.toast-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--tb-radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 14px;
}

.toast-success .toast-icon { background: var(--tb-success-soft); color: var(--tb-success); }
.toast-error .toast-icon { background: var(--tb-danger-soft); color: var(--tb-danger); }
.toast-warning .toast-icon { background: var(--tb-warning-soft); color: var(--tb-warning); }
.toast-info .toast-icon { background: var(--tb-info-soft); color: var(--tb-info); }

.toast-content { flex: 1; min-width: 0; }

.toast-title {
    font-weight: 600;
    font-size: 13.5px;
    margin-bottom: 2px;
}

.toast-message {
    font-size: 12.5px;
    color: var(--tb-text-secondary);
}

.toast-close {
    width: 24px;
    height: 24px;
    border-radius: var(--tb-radius-full);
    border: none;
    background: transparent;
    color: var(--tb-text-tertiary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--tb-transition-fast);
    font-size: 12px;
    flex-shrink: 0;
}

.toast-close:hover {
    background: var(--tb-bg-hover);
    color: var(--tb-text);
}

@keyframes toastIn {
    from { transform: translateX(30px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes toastOut {
    to { transform: translateX(30px); opacity: 0; }
}

/* ============================================
   MODAL
   ============================================ */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(10px);
    z-index: 1500;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--tb-bg-elevated);
    border-radius: var(--tb-radius-xl);
    width: 92%;
    max-width: 560px;
    max-height: 88vh;
    overflow: hidden;
    box-shadow: var(--tb-shadow-xl);
    transform: scale(0.96) translateY(8px);
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--tb-space-5) var(--tb-space-6);
    border-bottom: 1px solid var(--tb-border-light);
}

.modal-header h3 {
    font-size: 17px;
    font-weight: 600;
}

.modal-close {
    width: 32px;
    height: 32px;
    border-radius: var(--tb-radius-full);
    border: none;
    background: var(--tb-bg-secondary);
    color: var(--tb-text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--tb-transition-fast);
    font-size: 13px;
}

.modal-close:hover {
    background: var(--tb-bg-hover);
    color: var(--tb-text);
}

.modal-body {
    padding: var(--tb-space-5) var(--tb-space-6);
    overflow-y: auto;
    max-height: calc(88vh - 80px);
}

/* ============================================
   TOOL SPECIFIC STYLES
   ============================================ */

.split-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--tb-space-8);
}

.settings-panel {
    background: var(--tb-bg-tertiary);
    border-radius: var(--tb-radius-lg);
    padding: var(--tb-space-6);
}

.settings-panel h4 {
    font-size: 12px;
    font-weight: 600;
    margin-bottom: var(--tb-space-4);
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: var(--tb-text-secondary);
}

.preview-panel {
    background: var(--tb-bg-tertiary);
    border-radius: var(--tb-radius-lg);
    padding: var(--tb-space-6);
    min-height: 300px;
}

.preview-panel h4 {
    font-size: 12px;
    font-weight: 600;
    margin-bottom: var(--tb-space-4);
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: var(--tb-text-secondary);
}

.range-slider {
    width: 100%;
    -webkit-appearance: none;
    height: 5px;
    border-radius: var(--tb-radius-full);
    background: var(--tb-bg-secondary);
    outline: none;
}

.range-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--tb-primary), #42a5f5);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 113, 227, 0.3);
    border: 2.5px solid white;
    transition: var(--tb-transition-fast);
}

.range-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    box-shadow: 0 3px 12px rgba(0, 113, 227, 0.4);
}

.range-value {
    display: inline-block;
    min-width: 36px;
    text-align: right;
    font-weight: 600;
    color: var(--tb-primary);
    font-size: 13px;
}

.checkbox-group,
.radio-group {
    display: flex;
    flex-direction: column;
    gap: var(--tb-space-2);
}

.checkbox-item,
.radio-item {
    display: flex;
    align-items: center;
    gap: var(--tb-space-3);
    cursor: pointer;
    padding: var(--tb-space-2) var(--tb-space-3);
    border-radius: var(--tb-radius-sm);
    transition: var(--tb-transition-fast);
}

.checkbox-item:hover,
.radio-item:hover { background: var(--tb-bg-hover); }

.checkbox-item input,
.radio-item input {
    width: 16px;
    height: 16px;
    accent-color: var(--tb-primary);
    flex-shrink: 0;
}

input[type="color"] {
    width: 52px;
    height: 36px;
    border: 1px solid var(--tb-border);
    border-radius: var(--tb-radius-sm);
    cursor: pointer;
    padding: 2px;
    background: var(--tb-bg-elevated);
}

/* Data Table */
.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-top: var(--tb-space-4);
    border-radius: var(--tb-radius-md);
    overflow: hidden;
    border: 1px solid var(--tb-border-light);
}

.data-table th,
.data-table td {
    padding: 12px var(--tb-space-4);
    text-align: left;
    border-bottom: 1px solid var(--tb-border-light);
}

.data-table th {
    font-weight: 600;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--tb-text-secondary);
    background: var(--tb-bg-tertiary);
}

.data-table tr:last-child td { border-bottom: none; }

.data-table tr:hover td { background: var(--tb-bg-hover); }

/* Invoice preview */
.invoice-preview {
    background: white;
    border: 1px solid var(--tb-border);
    border-radius: var(--tb-radius-md);
    padding: var(--tb-space-8);
    max-width: 800px;
    margin: 0 auto;
    box-shadow: var(--tb-shadow-sm);
}

.invoice-form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--tb-space-5);
}

.invoice-two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--tb-space-4);
}

.invoice-item-row {
    transition: var(--tb-transition-fast);
}

.invoice-item-row:hover {
    background: var(--tb-bg-elevated) !important;
}

.invoice-item-row input,
.invoice-item-row select {
    font-size: 13px;
    padding: 8px 10px;
}

@media (max-width: 768px) {
    .invoice-form-grid { grid-template-columns: 1fr; }
    .invoice-two-col { grid-template-columns: 1fr; }
    .invoice-item-row {
        grid-template-columns: 1fr 1fr !important;
    }
}

/* QR display */
.qr-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--tb-space-5);
    padding: var(--tb-space-8);
}

/* Calculator */
.calculator-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--tb-space-8);
}

.calc-inputs { display: flex; flex-direction: column; gap: var(--tb-space-4); }

.calc-results {
    background: linear-gradient(145deg, var(--tb-primary), #1a6fc4);
    border-radius: var(--tb-radius-xl);
    padding: var(--tb-space-8);
    color: white;
    display: flex;
    flex-direction: column;
    justify-content: center;
    box-shadow: 0 8px 32px rgba(0, 113, 227, 0.2);
}

.calc-results .result-label {
    font-size: 13px;
    opacity: 0.85;
    margin-bottom: var(--tb-space-2);
    font-weight: 500;
}

.calc-results .result-value {
    font-size: 34px;
    font-weight: 700;
    margin-bottom: var(--tb-space-6);
    letter-spacing: -0.5px;
    overflow-wrap: break-word;
    word-break: break-word;
}

/* Resume */
.resume-builder-preview {
    background: white;
    border: 1px solid var(--tb-border);
    border-radius: var(--tb-radius-md);
    padding: var(--tb-space-8);
    min-height: 600px;
}

/* Video/Audio */
.media-preview {
    background: #0d0d0d;
    border-radius: var(--tb-radius-lg);
    overflow: hidden;
    aspect-ratio: 16/9;
    display: flex;
    align-items: center;
    justify-content: center;
}

.media-preview video,
.media-preview audio { width: 100%; height: 100%; object-fit: contain; }

/* Badge */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: var(--tb-radius-full);
    font-size: 11px;
    font-weight: 600;
}

.badge-blue { background: var(--tb-primary-soft); color: var(--tb-primary); }
.badge-green { background: var(--tb-success-soft); color: var(--tb-success); }
.badge-orange { background: var(--tb-warning-soft); color: var(--tb-warning); }
.badge-red { background: var(--tb-danger-soft); color: var(--tb-danger); }
.badge-gray { background: var(--tb-bg-secondary); color: var(--tb-text-secondary); }

/* Step indicator */
.step-indicator {
    display: flex;
    align-items: center;
    gap: var(--tb-space-2);
    margin-bottom: var(--tb-space-8);
}

.step {
    display: flex;
    align-items: center;
    gap: var(--tb-space-2);
    font-size: 13px;
    color: var(--tb-text-tertiary);
    font-weight: 500;
}

.step .step-num {
    width: 26px;
    height: 26px;
    border-radius: var(--tb-radius-full);
    background: var(--tb-bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
}

.step.active { color: var(--tb-primary); }
.step.active .step-num { background: var(--tb-primary); color: white; }

.step.completed { color: var(--tb-success); }
.step.completed .step-num { background: var(--tb-success); color: white; }

.step-line {
    flex: 1;
    height: 2px;
    background: var(--tb-bg-secondary);
    border-radius: var(--tb-radius-full);
    max-width: 40px;
}

.step-line.completed { background: var(--tb-success); }

/* Info card */
.info-card {
    background: linear-gradient(135deg, var(--tb-primary-soft), rgba(90, 200, 250, 0.05));
    border: 1px solid rgba(0, 113, 227, 0.1);
    border-radius: var(--tb-radius-lg);
    padding: var(--tb-space-5);
    margin-bottom: var(--tb-space-5);
}

.info-card h4 {
    font-size: 13px;
    font-weight: 600;
    color: var(--tb-primary);
    margin-bottom: var(--tb-space-2);
    display: flex;
    align-items: center;
    gap: var(--tb-space-2);
}

.info-card p {
    font-size: 13px;
    color: var(--tb-text-secondary);
    line-height: 1.6;
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.loading { animation: pulse 1.5s ease-in-out infinite; }

@keyframes spin {
    to { transform: rotate(360deg); }
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--tb-border);
    border-top-color: var(--tb-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    display: inline-block;
}

/* ============================================
   STAGGER ENTRANCE ANIMATIONS
   ============================================ */

.stagger-item {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1), transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.stagger-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.stagger-1 { transition-delay: 0.05s; }
.stagger-2 { transition-delay: 0.1s; }
.stagger-3 { transition-delay: 0.15s; }
.stagger-4 { transition-delay: 0.2s; }
.stagger-5 { transition-delay: 0.25s; }
.stagger-6 { transition-delay: 0.3s; }
.stagger-7 { transition-delay: 0.35s; }
.stagger-8 { transition-delay: 0.4s; }

/* ============================================
   SCROLL REVEAL
   ============================================ */

.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.96);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-scale.revealed {
    opacity: 1;
    transform: scale(1);
}

/* ============================================
   BUTTON RIPPLE
   ============================================ */

.btn {
    position: relative;
    overflow: hidden;
}

.btn-ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.35);
    transform: scale(0);
    animation: rippleEffect 0.5s linear;
    pointer-events: none;
}

@keyframes rippleEffect {
    to { transform: scale(4); opacity: 0; }
}

.btn:active {
    transform: scale(0.97);
}

/* ============================================
   SHAKE (form validation error)
   ============================================ */

.shake {
    animation: shakeEffect 0.4s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}

@keyframes shakeEffect {
    10%, 90% { transform: translateX(-1px); }
    20%, 80% { transform: translateX(2px); }
    30%, 50%, 70% { transform: translateX(-3px); }
    40%, 60% { transform: translateX(3px); }
}

/* ============================================
   NUMBER COUNT-UP
   ============================================ */

.count-up {
    display: inline-block;
    font-variant-numeric: tabular-nums;
}

/* ============================================
   TOOLTIP
   ============================================ */

[data-tooltip] {
    position: relative;
}

[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    background: var(--tb-text);
    color: white;
    padding: 6px 12px;
    border-radius: var(--tb-radius-sm);
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
    pointer-events: none;
    z-index: 100;
    box-shadow: var(--tb-shadow-md);
}

[data-tooltip]::before {
    content: '';
    position: absolute;
    bottom: calc(100% + 3px);
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    border: 5px solid transparent;
    border-top-color: var(--tb-text);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
    pointer-events: none;
    z-index: 100;
}

[data-tooltip]:hover::after,
[data-tooltip]:hover::before {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* ============================================
   SMOOTH PAGE TRANSITION
   ============================================ */

.content-area {
    transition: opacity 0.2s ease;
}

.content-area.switching {
    opacity: 0;
}

/* ============================================
   FOCUS STATES (accessibility)
   ============================================ */

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--tb-primary);
    outline-offset: 2px;
    border-radius: var(--tb-radius-sm);
}

/* ============================================
   REDUCED MOTION
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .hero-icon { animation: none; }
    .reveal, .reveal-scale, .stagger-item {
        opacity: 1;
        transform: none;
        transition: none;
    }
    .content-area { transition: none; }
}

/* ============================================
   SIDEBAR ACTIVE PILL
   ============================================ */

.nav-active-pill {
    position: absolute;
    left: 6px;
    width: 3px;
    background: linear-gradient(180deg, var(--tb-primary), #42a5f5);
    border-radius: var(--tb-radius-full);
    opacity: 0;
    transition: top 0.35s cubic-bezier(0.34, 1.56, 0.64, 1), height 0.3s ease, opacity 0.2s ease;
    pointer-events: none;
    z-index: 10;
}

.nav-active-pill.visible {
    opacity: 1;
}

/* ============================================
   SIDEBAR TOOLTIP (collapsed state)
   ============================================ */

.sidebar.collapsed .nav-tool,
.sidebar.collapsed .nav-category-header {
    position: relative;
}

.sidebar.collapsed .nav-tool:hover::after,
.sidebar.collapsed .nav-category-header:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    left: calc(100% + 10px);
    top: 50%;
    transform: translateY(-50%);
    background: var(--tb-text);
    color: white;
    padding: 6px 12px;
    border-radius: var(--tb-radius-sm);
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
    z-index: 200;
    box-shadow: var(--tb-shadow-md);
    pointer-events: none;
}

.sidebar.collapsed .nav-tool:hover::before,
.sidebar.collapsed .nav-category-header:hover::before {
    content: '';
    position: absolute;
    left: calc(100% + 5px);
    top: 50%;
    transform: translateY(-50%);
    border: 5px solid transparent;
    border-right-color: var(--tb-text);
    z-index: 200;
    pointer-events: none;
}

/* ============================================
   STICKY TOOL HEADER
   ============================================ */

.tool-header {
    position: sticky;
    top: 60px;
    z-index: 40;
    background: linear-gradient(180deg, rgba(245, 247, 250, 0.95) 0%, rgba(245, 247, 250, 0.85) 70%, transparent 100%);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    margin: calc(-1 * var(--tb-space-8)) calc(-1 * var(--tb-space-8)) var(--tb-space-8);
    padding: var(--tb-space-6) var(--tb-space-8);
    border-bottom: 1px solid var(--tb-border-light);
}

/* ============================================
   BACK TO TOP
   ============================================ */

.back-to-top {
    position: fixed;
    bottom: var(--tb-space-6);
    right: var(--tb-space-6);
    width: 44px;
    height: 44px;
    border-radius: var(--tb-radius-full);
    background: var(--tb-bg-elevated);
    color: var(--tb-text-secondary);
    border: 1px solid var(--tb-border);
    box-shadow: var(--tb-shadow-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--tb-transition-fast);
    z-index: 90;
    pointer-events: none;
}

.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.back-to-top:hover {
    background: var(--tb-primary);
    color: white;
    border-color: var(--tb-primary);
    transform: translateY(-2px);
}

/* ============================================
   CUSTOM CHECKBOX / RADIO
   ============================================ */

input[type="checkbox"],
input[type="radio"] {
    appearance: none;
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border: 2px solid var(--tb-border);
    border-radius: 5px;
    background: var(--tb-bg-elevated);
    cursor: pointer;
    position: relative;
    transition: var(--tb-transition-fast);
    flex-shrink: 0;
    margin: 0;
}

input[type="radio"] {
    border-radius: 50%;
}

input[type="checkbox"]:hover,
input[type="radio"]:hover {
    border-color: var(--tb-primary);
}

input[type="checkbox"]:checked {
    background: var(--tb-primary);
    border-color: var(--tb-primary);
}

input[type="checkbox"]:checked::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 2px;
    width: 4px;
    height: 8px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

input[type="radio"]:checked {
    border-color: var(--tb-primary);
    border-width: 5px;
    background: white;
}

input[type="checkbox"]:focus-visible,
input[type="radio"]:focus-visible {
    outline: 2px solid var(--tb-primary);
    outline-offset: 2px;
}

/* ============================================
   BETTER DISABLED STATES
   ============================================ */

.btn:disabled,
input:disabled,
textarea:disabled,
select:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
    filter: grayscale(0.4);
}

input:disabled,
textarea:disabled,
select:disabled {
    background: var(--tb-bg-secondary);
}

/* ============================================
   CODE BLOCK
   ============================================ */

.code-block {
    background: #1e1e2e;
    color: #cdd6f4;
    border-radius: var(--tb-radius-md);
    padding: var(--tb-space-5);
    font-family: 'SF Mono', 'Fira Code', 'JetBrains Mono', monospace;
    font-size: 13px;
    line-height: 1.6;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-word;
    border: 1px solid rgba(255,255,255,0.05);
}

.code-block .key { color: #f38ba8; }
.code-block .string { color: #a6e3a1; }
.code-block .number { color: #fab387; }
.code-block .boolean { color: #89b4fa; }
.code-block .null { color: #6c7086; }

/* ============================================
   IMAGE HOVER ZOOM
   ============================================ */

.img-zoom {
    overflow: hidden;
    border-radius: var(--tb-radius-md);
    cursor: zoom-in;
}

.img-zoom img {
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.img-zoom:hover img {
    transform: scale(1.05);
}

/* ============================================
   ENHANCED DROPZONE DRAG
   ============================================ */

.dropzone.dragover {
    border-color: var(--tb-primary);
    background: var(--tb-primary-soft);
    transform: scale(1.01);
    box-shadow: var(--tb-shadow-md);
}

.dropzone.dragover .dropzone-icon {
    transform: scale(1.1) rotate(-6deg);
}

/* ============================================
   SEARCH HIGHLIGHT
   ============================================ */

.search-highlight {
    background: linear-gradient(180deg, transparent 60%, rgba(0, 113, 227, 0.2) 60%);
    font-weight: 600;
    color: var(--tb-primary);
    border-radius: 2px;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 900px) {
    .split-grid,
    .calculator-grid { grid-template-columns: 1fr; }
    .categories-grid { grid-template-columns: 1fr; }
    .popular-tools-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
    .why-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: 280px !important;
    }
    .sidebar.open { transform: translateX(0); }
    .sidebar.collapsed { width: 280px !important; }
    .sidebar.collapsed .logo-text,
    .sidebar.collapsed .sidebar-search-trigger,
    .sidebar.collapsed .sidebar-section-title,
    .sidebar.collapsed .sidebar-section,
    .sidebar.collapsed .cat-name,
    .sidebar.collapsed .cat-chevron { display: block !important; }
    .sidebar.collapsed .nav-tool span { display: block !important; }
    .main-content { margin-left: 0 !important; }
    .mobile-menu-btn { display: flex; }
    .content-wrapper { padding: var(--tb-space-4); }
    .top-bar { padding: 0 var(--tb-space-4); }
    .hero-section h1 { font-size: 28px; }
    .hero-stats { gap: var(--tb-space-6); }
    .tool-workspace { padding: var(--tb-space-5); }
    .tool-header { flex-direction: column; align-items: flex-start; gap: var(--tb-space-3); }
    .tools-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
    .popular-tools-grid { grid-template-columns: 1fr; }
    .why-grid { grid-template-columns: 1fr; }
    .why-section { margin-top: 40px; padding: 24px 0; }
    .why-heading { font-size: 20px; }
    .search-modal { margin-top: 60px; }
    .calc-results { padding: var(--tb-space-5); }
    .calc-results .result-value { font-size: 26px; overflow-wrap: break-word; word-break: break-word; }
}

/* ============================================
   SCROLLBAR
   ============================================ */

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: var(--tb-border);
    border-radius: var(--tb-radius-full);
}
::-webkit-scrollbar-thumb:hover { background: var(--tb-text-tertiary); }

/* ============================================
   PRINT
   ============================================ */

@media print {
    .sidebar, .top-bar, .tool-actions, .btn, .breadcrumb, .back-to-top, .tool-header { display: none !important; }
    .main-content { margin-left: 0 !important; }
    .tool-workspace { box-shadow: none; border: none; padding: 0; }
    .content-wrapper { padding: 20px; }
}

/* ============================================
   SIGN PDF EDITOR
   ============================================ */

.sign-pdf-upload {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 500px;
}

.sign-pdf-upload .dropzone {
    max-width: 480px;
    width: 100%;
}

.sign-pdf-editor {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 200px);
    min-height: 560px;
    background: var(--tb-bg-secondary);
    border-radius: var(--tb-radius-lg);
    border: 1px solid var(--tb-border);
    overflow: hidden;
}

.sign-pdf-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    background: var(--tb-bg-elevated);
    border-bottom: 1px solid var(--tb-border);
    gap: 12px;
    flex-shrink: 0;
}

.sign-pdf-toolbar-left,
.sign-pdf-toolbar-center,
.sign-pdf-toolbar-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.sign-pdf-filename {
    font-size: 13px;
    font-weight: 500;
    color: var(--tb-text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.sign-pdf-filename i { color: #e74c3c; }

.sign-pdf-page-nav {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--tb-bg-secondary);
    padding: 4px 8px;
    border-radius: var(--tb-radius-sm);
    font-size: 13px;
    font-weight: 500;
}

.sign-pdf-page-nav .icon-btn {
    width: 28px;
    height: 28px;
    font-size: 11px;
}

.sign-pdf-toolbar-center {
    background: var(--tb-bg-secondary);
    padding: 4px 12px;
    border-radius: var(--tb-radius-sm);
    font-size: 13px;
    font-weight: 500;
    color: var(--tb-text-secondary);
}

.sign-pdf-toolbar-center .icon-btn {
    width: 28px;
    height: 28px;
    font-size: 11px;
}

#zoomLevel {
    min-width: 48px;
    text-align: center;
    font-size: 12px;
}

.sign-pdf-body {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.sign-pdf-thumbs {
    width: 140px;
    background: var(--tb-bg-elevated);
    border-right: 1px solid var(--tb-border);
    overflow-y: auto;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex-shrink: 0;
}

.sign-pdf-thumb {
    width: 100%;
    aspect-ratio: 0.77;
    background: var(--tb-bg-secondary);
    border-radius: var(--tb-radius-sm);
    border: 2px solid transparent;
    cursor: pointer;
    overflow: hidden;
    position: relative;
    transition: var(--tb-transition-fast);
}

.sign-pdf-thumb:hover { border-color: var(--tb-primary); }

.sign-pdf-thumb.active {
    border-color: var(--tb-primary);
    box-shadow: 0 0 0 3px var(--tb-primary-soft);
}

.sign-pdf-thumb canvas {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.sign-pdf-thumb-label {
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 10px;
    font-weight: 600;
    background: rgba(0,0,0,0.5);
    color: white;
    padding: 1px 6px;
    border-radius: var(--tb-radius-full);
}

.sign-pdf-viewer {
    flex: 1;
    overflow: auto;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 24px;
    position: relative;
}

.sign-pdf-page-wrap {
    position: relative;
    box-shadow: var(--tb-shadow-lg);
    background: white;
    border-radius: 2px;
}

.sign-pdf-page-wrap canvas {
    display: block;
    border-radius: 2px;
}

.sign-pdf-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.sig-overlay {
    position: absolute;
    pointer-events: auto;
    cursor: move;
    user-select: none;
    border: 2px solid transparent;
    transition: border-color 0.15s;
}

.sig-overlay:hover,
.sig-overlay.selected {
    border-color: var(--tb-primary);
}

.sig-overlay img {
    width: 100%;
    height: 100%;
    display: block;
    pointer-events: none;
    object-fit: contain;
}

.sig-handle {
    position: absolute;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--tb-primary);
    border: 2px solid white;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
    display: none;
    z-index: 10;
}

.sig-overlay.selected .sig-handle { display: block; }

.sig-resize {
    bottom: -7px;
    right: -7px;
    cursor: nwse-resize;
}

.sig-rotate {
    top: -24px;
    left: 50%;
    transform: translateX(-50%);
    cursor: grab;
    background: var(--tb-warning);
}

.sig-rotate::after {
    content: '';
    position: absolute;
    top: 14px;
    left: 50%;
    transform: translateX(-50%);
    width: 1px;
    height: 8px;
    background: var(--tb-warning);
}

.sig-delete {
    top: -7px;
    right: -7px;
    background: var(--tb-danger);
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 8px;
}

.sig-overlay.selected .sig-delete { display: flex; }

.sig-delete:hover { background: #c0392b; }

.sign-pdf-right-panel {
    width: 280px;
    background: var(--tb-bg-elevated);
    border-left: 1px solid var(--tb-border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    overflow: hidden;
}

.sign-pdf-right-panel h4 {
    padding: 14px 16px;
    font-size: 14px;
    font-weight: 600;
    border-bottom: 1px solid var(--tb-border);
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
}

.sign-pdf-right-panel h4 i { color: var(--tb-primary); }

.sign-pdf-tabs {
    display: flex;
    border-bottom: 1px solid var(--tb-border);
    padding: 0 12px;
    gap: 4px;
}

.sign-pdf-tab {
    flex: 1;
    padding: 10px 4px;
    border: none;
    background: none;
    font-family: var(--tb-font);
    font-size: 12px;
    font-weight: 500;
    color: var(--tb-text-tertiary);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: var(--tb-transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.sign-pdf-tab:hover { color: var(--tb-text-secondary); }

.sign-pdf-tab.active {
    color: var(--tb-primary);
    border-bottom-color: var(--tb-primary);
}

.sign-pdf-tab-content {
    display: none;
    padding: 16px;
    flex-direction: column;
    gap: 14px;
    overflow-y: auto;
}

.sign-pdf-tab-content.active { display: flex; }

.sig-color-picker {
    display: flex;
    gap: 8px;
}

.sig-color {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--tb-transition-fast);
    padding: 0;
}

.sig-color:hover { transform: scale(1.1); }

.sig-color.active {
    border-color: var(--tb-primary);
    box-shadow: 0 0 0 2px var(--tb-primary-soft);
}

.sig-style-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sig-style-option {
    padding: 10px 12px;
    border: 2px solid var(--tb-border);
    border-radius: var(--tb-radius-sm);
    cursor: pointer;
    background: var(--tb-bg-elevated);
    transition: var(--tb-transition-fast);
    display: flex;
    align-items: center;
    gap: 10px;
}

.sig-style-option:hover { border-color: var(--tb-primary); }

.sig-style-option.active {
    border-color: var(--tb-primary);
    background: var(--tb-primary-soft);
}

.sig-style-preview {
    width: 80px;
    height: 36px;
    flex-shrink: 0;
}

.sig-style-name {
    font-size: 12px;
    font-weight: 500;
    color: var(--tb-text-secondary);
}

#drawCanvas {
    width: 100%;
    height: 120px;
    border: 2px solid var(--tb-border);
    border-radius: var(--tb-radius-sm);
    background: white;
    cursor: crosshair;
    touch-action: none;
}

.sig-draw-actions {
    display: flex;
    gap: 8px;
    margin-top: 8px;
}

.dropzone-sm {
    border: 2px dashed var(--tb-border);
    border-radius: var(--tb-radius-md);
    padding: 24px;
    text-align: center;
    cursor: pointer;
    transition: var(--tb-transition-fast);
    color: var(--tb-text-tertiary);
    font-size: 13px;
    position: relative;
}

.dropzone-sm:hover {
    border-color: var(--tb-primary);
    color: var(--tb-primary);
    background: var(--tb-primary-soft);
}

.dropzone-sm i {
    font-size: 24px;
    display: block;
    margin-bottom: 8px;
}

.dropzone-sm input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.sign-pdf-sig-list {
    padding: 12px 16px;
    border-top: 1px solid var(--tb-border);
    overflow-y: auto;
    flex: 1;
}

.sign-pdf-sig-list-title {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--tb-text-tertiary);
    margin-bottom: 10px;
}

.sig-list-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    border-radius: var(--tb-radius-sm);
    background: var(--tb-bg-secondary);
    margin-bottom: 6px;
    cursor: pointer;
    transition: var(--tb-transition-fast);
    border: 1px solid transparent;
}

.sig-list-item:hover { background: var(--tb-bg-hover); }

.sig-list-item.active {
    border-color: var(--tb-primary);
    background: var(--tb-primary-soft);
}

.sig-list-item img {
    width: 40px;
    height: 28px;
    object-fit: contain;
    background: white;
    border-radius: 4px;
    border: 1px solid var(--tb-border);
}

.sig-list-item-info {
    flex: 1;
    min-width: 0;
}

.sig-list-item-name {
    font-size: 12px;
    font-weight: 500;
}

.sig-list-item-meta {
    font-size: 11px;
    color: var(--tb-text-tertiary);
}

.sig-list-item-delete {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: var(--tb-text-tertiary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    transition: var(--tb-transition-fast);
}

.sig-list-item-delete:hover {
    background: var(--tb-danger-soft);
    color: var(--tb-danger);
}

.sign-pdf-empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--tb-text-tertiary);
}

.sign-pdf-empty-state i {
    font-size: 32px;
    margin-bottom: 12px;
    display: block;
    opacity: 0.4;
}

.sign-pdf-empty-state p {
    font-size: 13px;
}

@media (max-width: 900px) {
    .sign-pdf-thumbs { display: none; }
    .sign-pdf-right-panel { width: 240px; }
}

/* ============================================
   SIGN PDF UPLOAD HERO — Option 3 Gradient Card
   ============================================ */

.sign-pdf-upload {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 640px;
    background: linear-gradient(180deg, #f0f2f5 0%, #f5f7fa 30%, #f8f9fb 70%, #ffffff 100%);
    border-radius: var(--tb-radius-lg);
    border: 1px solid var(--tb-border);
    padding: 64px 32px;
    position: relative;
    overflow: hidden;
}

.sign-pdf-upload::before {
    content: '';
    position: absolute;
    top: -160px;
    right: -120px;
    width: 480px;
    height: 480px;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.07) 0%, transparent 65%);
    border-radius: 50%;
    pointer-events: none;
}

.sign-pdf-upload::after {
    content: '';
    position: absolute;
    bottom: -140px;
    left: -100px;
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, rgba(118, 75, 162, 0.06) 0%, transparent 65%);
    border-radius: 50%;
    pointer-events: none;
}

.sign-pdf-hero {
    text-align: center;
    max-width: 640px;
    width: 100%;
    position: relative;
    z-index: 1;
}

.sign-pdf-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    color: var(--tb-primary);
    margin-bottom: 28px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
    letter-spacing: 0.2px;
}

.sign-pdf-hero-badge i {
    font-size: 10px;
    color: #ff9f0a;
}

.sign-pdf-hero h2 {
    font-size: 48px;
    font-weight: 800;
    letter-spacing: -1.5px;
    line-height: 1.12;
    color: var(--tb-text);
    margin-bottom: 16px;
}

.sign-pdf-hero h2 .gradient-text {
    background: linear-gradient(135deg, #0071e3, #5e5ce6, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sign-pdf-hero-desc {
    font-size: 16px;
    color: var(--tb-text-secondary);
    line-height: 1.7;
    max-width: 480px;
    margin: 0 auto 32px;
    font-weight: 400;
}

.sign-pdf-hero-badges {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 28px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.sign-pdf-hero-badge-item {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 13px;
    font-weight: 500;
    color: var(--tb-text-secondary);
}

.sign-pdf-hero-badge-item i {
    font-size: 14px;
}

.sign-pdf-hero-badge-item .fa-bolt { color: #ff9f0a; }
.sign-pdf-hero-badge-item .fa-shield-halved { color: #34c759; }
.sign-pdf-hero-badge-item .fa-globe { color: #0071e3; }

/* Gradient Dropzone Card */
.sign-pdf-gradient-card {
    max-width: 520px;
    margin: 0 auto;
    padding: 52px 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 55%, #6b8dd6 100%);
    border-radius: 28px;
    text-align: center;
    color: white;
    box-shadow: 0 24px 64px rgba(102, 126, 234, 0.28), 0 8px 24px rgba(0, 0, 0, 0.08);
    position: relative;
    overflow: hidden;
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.4s ease;
    cursor: pointer;
}

.sign-pdf-gradient-card:hover {
    transform: translateY(-4px) scale(1.01);
    box-shadow: 0 32px 80px rgba(102, 126, 234, 0.35), 0 12px 32px rgba(0, 0, 0, 0.1);
}

.sign-pdf-gradient-card::before {
    content: '';
    position: absolute;
    top: -60%;
    right: -25%;
    width: 320px;
    height: 320px;
    background: rgba(255, 255, 255, 0.07);
    border-radius: 50%;
    pointer-events: none;
}

.sign-pdf-gradient-card::after {
    content: '';
    position: absolute;
    bottom: -50%;
    left: -15%;
    width: 280px;
    height: 280px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    pointer-events: none;
}

.sign-pdf-gradient-card > * {
    position: relative;
    z-index: 1;
}

.sign-pdf-gradient-card .card-icon {
    width: 72px;
    height: 72px;
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: white;
    font-size: 28px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.sign-pdf-gradient-card:hover .card-icon {
    transform: scale(1.08) rotate(-4deg);
}

.sign-pdf-gradient-card h3 {
    font-size: 22px;
    font-weight: 700;
    color: white;
    margin-bottom: 8px;
    letter-spacing: -0.3px;
}

.sign-pdf-gradient-card p {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 24px;
    font-weight: 400;
}

.sign-pdf-gradient-card .btn-white {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    background: #ffffff;
    color: #667eea;
    border: none;
    border-radius: 14px;
    font-family: var(--tb-font);
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

.sign-pdf-gradient-card .btn-white:hover {
    transform: translateY(-2px) scale(1.03);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.18);
    color: #764ba2;
}

.sign-pdf-privacy-note {
    text-align: center;
    margin-top: 24px;
    font-size: 12px;
    color: var(--tb-text-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-weight: 500;
}

.sign-pdf-privacy-note i {
    color: var(--tb-success);
    font-size: 11px;
}

@media (max-width: 700px) {
    .sign-pdf-editor { height: auto; min-height: auto; }
    .sign-pdf-body { flex-direction: column; }
    .sign-pdf-right-panel {
        width: 100%;
        border-left: none;
        border-top: 1px solid var(--tb-border);
        max-height: 360px;
    }
    .sign-pdf-viewer { min-height: 400px; }
    .sign-pdf-upload { padding: 40px 20px; min-height: auto; }
    .sign-pdf-hero h2 { font-size: 32px; }
    .sign-pdf-hero-badges { gap: 16px; }
    .sign-pdf-gradient-card { padding: 40px 24px; border-radius: 22px; }
    .sign-pdf-gradient-card h3 { font-size: 18px; }
}

/* ============================================
   V4 GRADIENT BOLD HOMEPAGE
   ============================================ */

.gradient-home {
    position: relative;
    overflow: hidden;
    min-height: 100%;
    padding: var(--tb-space-6) var(--tb-space-8) var(--tb-space-8);
}

/* ---- Gradient Hero ---- */
.gradient-hero {
    position: relative;
    text-align: center;
    padding: 56px 48px 80px;
    margin: calc(-1 * var(--tb-space-8)) calc(-1 * var(--tb-space-8)) var(--tb-space-8);
    background: linear-gradient(165deg, #0071e3 0%, #5e5ce6 35%, #8b5cf6 65%, #c084fc 100%);
    overflow: hidden;
}

.gradient-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}

.gradient-hero::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 80px;
    background: linear-gradient(to top, var(--tb-bg), transparent);
    pointer-events: none;
}

.gradient-hero-inner {
    position: relative;
    z-index: 2;
    max-width: 700px;
    margin: 0 auto;
}

.gradient-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.2);
    color: #fff;
    padding: 8px 18px;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 28px;
    backdrop-filter: blur(8px);
}

.gradient-hero h1 {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 900;
    letter-spacing: -2px;
    line-height: 1.08;
    margin-bottom: 20px;
    color: #fff;
}

.gradient-hero h1 .hero-accent {
    color: rgba(255,255,255,0.75);
}

.gradient-hero p {
    font-size: 18px;
    color: rgba(255,255,255,0.85);
    max-width: 520px;
    margin: 0 auto 32px;
    line-height: 1.6;
}

.gradient-hero-search {
    max-width: 480px;
    margin: 0 auto 28px;
    position: relative;
}

.gradient-hero-search input {
    width: 100%;
    padding: 16px 48px 16px 48px;
    border-radius: 14px;
    border: none;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(12px);
    color: #fff;
    font-family: var(--tb-font);
    font-size: 15px;
    outline: none;
    transition: all 0.3s;
    cursor: pointer;
}

.gradient-hero-search input::placeholder { color: rgba(255,255,255,0.55); }

.gradient-hero-search input:hover,
.gradient-hero-search input:focus {
    background: rgba(255,255,255,0.25);
    box-shadow: 0 8px 32px rgba(0,0,0,0.15);
}

.gradient-hero-search i {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: rgba(255,255,255,0.5);
    font-size: 14px;
}

.gradient-hero-trust {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
    font-size: 14px;
    color: rgba(255,255,255,0.8);
}

.gradient-hero-trust span {
    display: flex;
    align-items: center;
    gap: 6px;
}

/* ---- Section Title ---- */
.gradient-section-title {
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--tb-text-tertiary);
    margin-bottom: var(--tb-space-5);
    display: flex;
    align-items: center;
    gap: var(--tb-space-3);
}

/* ---- Chip (fav/recent) ---- */
.gradient-chip-scroll {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: var(--tb-space-6);
}

.gradient-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--tb-bg-elevated);
    border: 1px solid var(--tb-border);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    color: var(--tb-text);
    cursor: pointer;
    transition: var(--tb-transition);
    box-shadow: var(--tb-shadow-sm);
}

.gradient-chip:hover {
    background: var(--tb-bg-hover);
    transform: translateY(-1px);
    box-shadow: var(--tb-shadow-md);
}

/* ---- Category Cards ---- */
.gradient-categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--tb-space-4);
    margin-bottom: var(--tb-space-8);
    margin-top: -40px;
    position: relative;
    z-index: 3;
}

.gradient-cat-card {
    position: relative;
    padding: 28px;
    background: #fff;
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.08);
    border: 1px solid rgba(0,0,0,0.04);
    cursor: pointer;
    transition: all 0.45s cubic-bezier(0.16, 1, 0.3, 1);
    overflow: hidden;
    top: 0;
}

.gradient-cat-card:hover {
    transform: translateY(-10px) scale(1.02);
    border-color: var(--cat-color);
    box-shadow: 0 30px 80px var(--cat-shadow);
}

.gradient-cat-card:hover .gradient-cat-icon {
    background: linear-gradient(135deg, var(--cat-color), var(--cat-color-dark)) !important;
    color: #fff !important;
    box-shadow: 0 8px 24px var(--cat-icon-shadow) !important;
    transform: scale(1.1) rotate(-3deg);
}

.gradient-cat-card:hover .gradient-cat-tag {
    background: var(--cat-tag-bg) !important;
    color: var(--cat-color) !important;
}

.gradient-cat-card:nth-child(1) { margin-top: 0; }
.gradient-cat-card:nth-child(2) { margin-top: 20px; }
.gradient-cat-card:nth-child(3) { margin-top: 40px; }
.gradient-cat-card:nth-child(4) { margin-top: 10px; }
.gradient-cat-card:nth-child(5) { margin-top: 30px; }
.gradient-cat-card:nth-child(6) { margin-top: 0; }
.gradient-cat-card:nth-child(7) { margin-top: 20px; }
.gradient-cat-card:nth-child(8) { margin-top: 40px; }
.gradient-cat-card:nth-child(9) { margin-top: 10px; }
.gradient-cat-card:nth-child(10) { margin-top: 30px; }
.gradient-cat-card:nth-child(11) { margin-top: 0; }
.gradient-cat-card:nth-child(12) { margin-top: 20px; }

.gradient-cat-header {
    display: flex;
    align-items: center;
    gap: var(--tb-space-4);
    margin-bottom: var(--tb-space-4);
}

.gradient-cat-icon {
    width: 48px;
    height: 48px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--cat-color, var(--tb-primary));
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.gradient-cat-info h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--tb-text);
    margin-bottom: 2px;
    letter-spacing: -0.3px;
}

.gradient-cat-info span {
    font-size: 14px;
    color: #94a3b8;
    font-weight: 500;
}

.gradient-cat-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.gradient-cat-tag {
    padding: 5px 12px;
    background: #f1f5f9;
    border-radius: 100px;
    font-size: 12px;
    color: #64748b;
    font-weight: 500;
    transition: all 0.3s ease;
}

/* ---- Popular Tool Cards ---- */
.gradient-popular-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--tb-space-4);
    margin-bottom: var(--tb-space-8);
}

.gradient-popular-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 20px;
    border-radius: 16px;
    background: #fff;
    border: 1px solid #f1f5f9;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.gradient-popular-card:hover {
    transform: translateX(6px);
    border-color: var(--cat-color);
    box-shadow: 0 12px 40px var(--cat-shadow);
}

.gradient-popular-card:hover .gradient-popular-icon {
    background: linear-gradient(135deg, var(--cat-color), var(--cat-color-dark)) !important;
    color: #fff !important;
    box-shadow: 0 6px 20px var(--cat-icon-shadow) !important;
    transform: scale(1.15) rotate(5deg);
}

.gradient-popular-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
    color: var(--cat-color, var(--tb-primary));
    transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.gradient-popular-info h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--tb-text);
    margin-bottom: 2px;
}

.gradient-popular-info span {
    font-size: 13px;
    color: #94a3b8;
    font-weight: 400;
}

.gradient-popular-arrow {
    margin-left: auto;
    color: #94a3b8;
    font-size: 12px;
    opacity: 0;
    transition: var(--tb-transition);
}

.gradient-popular-card:hover .gradient-popular-arrow {
    opacity: 1;
    transform: translateX(3px);
}

/* ---- Why Section ---- */
.gradient-why-section {
    background: linear-gradient(135deg, #f8fafc, #f1f5f9);
    border-radius: 32px;
    padding: 60px 48px;
    margin-bottom: var(--tb-space-6);
}

.gradient-why-heading {
    text-align: center;
    font-size: 32px;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 8px;
    color: var(--tb-text);
}

.gradient-why-sub {
    text-align: center;
    color: #64748b;
    font-size: 17px;
    margin-bottom: 40px;
}

.gradient-why-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.gradient-why-card {
    text-align: center;
    padding: 32px 20px;
    border-radius: 24px;
    border: 1px solid transparent;
    cursor: default;
    transition: all 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

.gradient-why-card:hover {
    transform: translateY(-8px) scale(1.03);
    border-color: rgba(0,113,227,0.15);
    background: rgba(255,255,255,0.6);
    box-shadow: 0 24px 60px rgba(0,0,0,0.06);
}

.gradient-why-card:hover .gradient-why-icon {
    transform: scale(1.15) rotate(-5deg);
    box-shadow: 0 12px 32px rgba(0,113,227,0.35);
}

.gradient-why-icon {
    width: 56px;
    height: 56px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, #0071e3, #5e5ce6);
    color: #fff;
    box-shadow: 0 8px 24px rgba(0,113,227,0.25);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.gradient-why-card h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--tb-text);
}

.gradient-why-card p {
    font-size: 14px;
    color: #64748b;
    line-height: 1.6;
}

/* ---- Homepage reveal override ---- */
.gradient-home .reveal-scale,
.gradient-home .reveal {
    opacity: 1 !important;
    transform: scale(1) translateY(0) !important;
}

/* ---- Responsive Gradient ---- */
@media (max-width: 1024px) {
    .gradient-why-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .gradient-home { padding: var(--tb-space-4); }
    .gradient-hero { padding: 40px 24px 60px; margin: calc(-1 * var(--tb-space-4)) calc(-1 * var(--tb-space-4)) var(--tb-space-6); }
    .gradient-hero h1 { font-size: 32px; }
    .gradient-categories-grid { grid-template-columns: 1fr; margin-top: -20px; }
    .gradient-cat-card { margin-top: 0 !important; }
    .gradient-popular-grid { grid-template-columns: 1fr; }
    .gradient-why-section { padding: 40px 24px; }
    .gradient-why-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
    .gradient-hero h1 { font-size: 28px; }
    .gradient-hero p { font-size: 15px; }
    .gradient-why-grid { grid-template-columns: 1fr; }
}


/* ============================================
   DARK MODE
   ============================================ */

[data-theme="dark"] {
    /* Override root variables */
    --tb-bg: #0d0d0f;
    --tb-bg-elevated: #1c1c1e;
    --tb-bg-secondary: #2c2c2e;
    --tb-bg-tertiary: #1a1a1c;
    --tb-bg-sidebar: rgba(28, 28, 30, 0.9);
    --tb-bg-hover: rgba(255, 255, 255, 0.06);
    --tb-bg-active: rgba(0, 113, 227, 0.15);

    --tb-text: #f5f5f7;
    --tb-text-secondary: #a1a1a6;
    --tb-text-tertiary: #6e6e73;
    --tb-text-inverse: #000000;
    --tb-text-muted: #86868b;

    --tb-border: rgba(255, 255, 255, 0.08);
    --tb-border-light: rgba(255, 255, 255, 0.05);
    --tb-border-focus: rgba(0, 113, 227, 0.4);

    --tb-shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.2);
    --tb-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
    --tb-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4), 0 1px 4px rgba(0, 0, 0, 0.3);
    --tb-shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5), 0 4px 12px rgba(0, 0, 0, 0.4);
    --tb-shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.6), 0 8px 20px rgba(0, 0, 0, 0.5);

    --tb-primary-soft: rgba(0, 113, 227, 0.15);
}

[data-theme="dark"] body {
    background: linear-gradient(180deg, #0d0d0f 0%, #111114 40%, #0a0a0c 100%);
    color: var(--tb-text);
}

[data-theme="dark"] .sidebar {
    background: rgba(28, 28, 30, 0.92);
    border-right-color: var(--tb-border);
}

[data-theme="dark"] .sidebar-header {
    border-bottom-color: var(--tb-border);
}

[data-theme="dark"] .logo-text {
    color: var(--tb-text);
}

[data-theme="dark"] .nav-category-header {
    color: var(--tb-text-secondary);
}

[data-theme="dark"] .nav-category-header:hover {
    background: var(--tb-bg-hover);
}

[data-theme="dark"] .nav-tool {
    color: var(--tb-text-secondary);
}

[data-theme="dark"] .nav-tool:hover {
    background: var(--tb-bg-hover);
    color: var(--tb-text);
}

[data-theme="dark"] .nav-tool.active {
    color: var(--tb-primary);
    background: var(--tb-bg-active);
}

[data-theme="dark"] .sidebar-footer {
    border-top-color: var(--tb-border);
    color: var(--tb-text-tertiary);
}

[data-theme="dark"] .top-bar {
    background: rgba(13, 13, 15, 0.8);
    border-bottom-color: var(--tb-border);
}

[data-theme="dark"] .breadcrumb a,
[data-theme="dark"] .breadcrumb .current {
    color: var(--tb-text-secondary);
}

[data-theme="dark"] .main-content {
    background: transparent;
}

[data-theme="dark"] .content-area {
    background: transparent;
}

[data-theme="dark"] .gradient-hero {
    background: linear-gradient(165deg, #0a4a9c 0%, #3a3a9e 35%, #5b3fa8 65%, #7a4fb0 100%);
}

[data-theme="dark"] .gradient-cat-card {
    background: var(--tb-bg-elevated);
    border-color: var(--tb-border);
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

[data-theme="dark"] .gradient-cat-card:hover {
    box-shadow: 0 30px 80px rgba(0,0,0,0.5);
}

[data-theme="dark"] .gradient-cat-info h3 {
    color: var(--tb-text);
}

[data-theme="dark"] .gradient-cat-tag {
    background: var(--tb-bg-secondary);
    color: var(--tb-text-secondary);
}

[data-theme="dark"] .gradient-popular-card {
    background: var(--tb-bg-elevated);
    border-color: var(--tb-border);
}

[data-theme="dark"] .gradient-popular-info h4 {
    color: var(--tb-text);
}

[data-theme="dark"] .gradient-popular-info span {
    color: var(--tb-text-tertiary);
}

[data-theme="dark"] .gradient-why-section {
    background: linear-gradient(135deg, #1a1a1c, #1c1c1e);
}

[data-theme="dark"] .gradient-why-heading {
    color: var(--tb-text);
}

[data-theme="dark"] .gradient-why-sub {
    color: var(--tb-text-secondary);
}

[data-theme="dark"] .gradient-why-card:hover {
    background: rgba(255,255,255,0.05);
}

[data-theme="dark"] .gradient-why-card h4 {
    color: var(--tb-text);
}

[data-theme="dark"] .gradient-why-card p {
    color: var(--tb-text-secondary);
}

[data-theme="dark"] .gradient-chip {
    background: var(--tb-bg-elevated);
    border-color: var(--tb-border);
    color: var(--tb-text);
}

[data-theme="dark"] .gradient-chip:hover {
    background: var(--tb-bg-hover);
}

[data-theme="dark"] .search-overlay {
    background: rgba(0,0,0,0.7);
}

[data-theme="dark"] .search-box {
    background: var(--tb-bg-elevated);
    border-color: var(--tb-border);
    box-shadow: 0 24px 60px rgba(0,0,0,0.5);
}

[data-theme="dark"] .search-input {
    color: var(--tb-text);
    background: transparent;
}

[data-theme="dark"] .search-input::placeholder {
    color: var(--tb-text-tertiary);
}

[data-theme="dark"] .search-result-item {
    border-bottom-color: var(--tb-border);
}

[data-theme="dark"] .search-result-item:hover,
[data-theme="dark"] .search-result-item.focused {
    background: var(--tb-bg-hover);
}

[data-theme="dark"] .search-result-item .sr-name {
    color: var(--tb-text);
}

[data-theme="dark"] .search-result-item .sr-desc {
    color: var(--tb-text-tertiary);
}

[data-theme="dark"] .modal-overlay {
    background: rgba(0,0,0,0.7);
}

[data-theme="dark"] .modal {
    background: var(--tb-bg-elevated);
    border-color: var(--tb-border);
    box-shadow: 0 24px 60px rgba(0,0,0,0.5);
}

[data-theme="dark"] .modal-header {
    border-bottom-color: var(--tb-border);
}

[data-theme="dark"] .modal-header h3 {
    color: var(--tb-text);
}

[data-theme="dark"] .toast {
    background: var(--tb-bg-elevated);
    border-color: var(--tb-border);
    box-shadow: 0 12px 40px rgba(0,0,0,0.4);
    color: var(--tb-text);
}

[data-theme="dark"] .toast-title {
    color: var(--tb-text);
}

[data-theme="dark"] .toast-message {
    color: var(--tb-text-secondary);
}

[data-theme="dark"] .site-footer {
    background: var(--tb-bg-elevated);
    border-top-color: var(--tb-border);
}

[data-theme="dark"] .footer-copy {
    color: var(--tb-text-tertiary);
}

[data-theme="dark"] .empty-state {
    color: var(--tb-text-secondary);
}

[data-theme="dark"] .empty-state h3 {
    color: var(--tb-text);
}

[data-theme="dark"] .empty-state p {
    color: var(--tb-text-tertiary);
}

[data-theme="dark"] .tool-page {
    color: var(--tb-text);
}

[data-theme="dark"] .tool-header h1 {
    color: var(--tb-text);
}

[data-theme="dark"] .tool-header p {
    color: var(--tb-text-secondary);
}

[data-theme="dark"] .tool-workspace {
    background: var(--tb-bg-elevated);
    border-color: var(--tb-border);
}

[data-theme="dark"] .settings-panel {
    background: var(--tb-bg-elevated);
    border-color: var(--tb-border);
}

[data-theme="dark"] .settings-panel h4 {
    color: var(--tb-text);
}

[data-theme="dark"] .form-group label {
    color: var(--tb-text-secondary);
}

[data-theme="dark"] input[type="text"],
[data-theme="dark"] input[type="number"],
[data-theme="dark"] input[type="email"],
[data-theme="dark"] input[type="url"],
[data-theme="dark"] input[type="password"],
[data-theme="dark"] textarea,
[data-theme="dark"] select {
    background: var(--tb-bg-secondary);
    border-color: var(--tb-border);
    color: var(--tb-text);
}

[data-theme="dark"] input::placeholder,
[data-theme="dark"] textarea::placeholder {
    color: var(--tb-text-tertiary);
}

[data-theme="dark"] input:focus,
[data-theme="dark"] textarea:focus,
[data-theme="dark"] select:focus {
    border-color: var(--tb-primary);
    box-shadow: 0 0 0 3px var(--tb-border-focus);
}

[data-theme="dark"] .dropzone {
    background: var(--tb-bg-secondary);
    border-color: var(--tb-border);
    color: var(--tb-text-secondary);
}

[data-theme="dark"] .dropzone.dragover {
    border-color: var(--tb-primary);
    background: var(--tb-bg-active);
}

[data-theme="dark"] .file-item {
    background: var(--tb-bg-secondary);
    border-color: var(--tb-border);
}

[data-theme="dark"] .file-name {
    color: var(--tb-text);
}

[data-theme="dark"] .file-meta {
    color: var(--tb-text-tertiary);
}

[data-theme="dark"] .result-area {
    background: var(--tb-bg-secondary);
    border-color: var(--tb-border);
}

[data-theme="dark"] .calculator-grid .calc-inputs,
[data-theme="dark"] .calculator-grid .calc-results {
    background: var(--tb-bg-elevated);
    border-color: var(--tb-border);
}

[data-theme="dark"] .preview-panel {
    background: var(--tb-bg-secondary);
    border-color: var(--tb-border);
}

[data-theme="dark"] .info-card {
    background: var(--tb-bg-secondary);
    border-color: var(--tb-border);
    color: var(--tb-text-secondary);
}

[data-theme="dark"] .back-to-top {
    background: var(--tb-bg-elevated);
    border-color: var(--tb-border);
    color: var(--tb-text);
    box-shadow: 0 4px 16px rgba(0,0,0,0.4);
}

[data-theme="dark"] .section-title {
    color: var(--tb-text-secondary);
}

[data-theme="dark"] .tool-card {
    background: var(--tb-bg-elevated);
    border-color: var(--tb-border);
}

[data-theme="dark"] .tool-card h3 {
    color: var(--tb-text);
}

[data-theme="dark"] .tool-card p {
    color: var(--tb-text-tertiary);
}

[data-theme="dark"] .tools-grid {
    background: transparent;
}

[data-theme="dark"] .mobile-menu-btn {
    color: var(--tb-text);
}

/* Theme toggle button */
.theme-toggle {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    border: 1px solid var(--tb-border);
    background: transparent;
    color: var(--tb-text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: var(--tb-transition);
    margin-right: 8px;
}

.theme-toggle:hover {
    background: var(--tb-bg-hover);
    color: var(--tb-text);
}

[data-theme="dark"] .theme-toggle:hover {
    background: var(--tb-bg-hover);
    color: #f5c542;
}

/* System preference fallback */
@media (prefers-color-scheme: dark) {
    html:not([data-theme="light"]) {
        --tb-bg: #0d0d0f;
        --tb-bg-elevated: #1c1c1e;
        --tb-bg-secondary: #2c2c2e;
        --tb-bg-tertiary: #1a1a1c;
        --tb-bg-sidebar: rgba(28, 28, 30, 0.9);
        --tb-bg-hover: rgba(255, 255, 255, 0.06);
        --tb-bg-active: rgba(0, 113, 227, 0.15);
        --tb-text: #f5f5f7;
        --tb-text-secondary: #a1a1a6;
        --tb-text-tertiary: #6e6e73;
        --tb-border: rgba(255, 255, 255, 0.08);
        --tb-border-light: rgba(255, 255, 255, 0.05);
        --tb-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
        --tb-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4), 0 1px 4px rgba(0, 0, 0, 0.3);
    }
}


/* ============================================
   REDUCED MOTION
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    .gradient-cat-card:hover,
    .gradient-popular-card:hover,
    .gradient-why-card:hover {
        transform: none !important;
    }
    .btn-ripple { display: none !important; }
}