/* Modern SaaS UI Design for MyMediaFinder */

/* CSS Reset and Base Styles */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette */
    --color-primary: #6366F1;     /* Indigo */
    --color-secondary: #14B8A6;   /* Teal */
    --color-background: #F9FAFB;  /* Light background */
    --color-surface: #FFFFFF;     /* White surface */
    --color-surface-hover: #F8FAFC;
    --color-border: #E5E7EB;      /* Light gray border */
    --color-border-hover: #D1D5DB;
    --color-text-primary: #111827;   /* Dark gray */
    --color-text-secondary: #6B7280; /* Medium gray */
    --color-text-muted: #9CA3AF;     /* Light gray */
    --color-success: #10B981;
    --color-error: #EF4444;
    --color-warning: #F59E0B;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --spacing-xs: 0.25rem;    /* 4px */
    --spacing-sm: 0.5rem;     /* 8px */
    --spacing-md: 1rem;       /* 16px */
    --spacing-lg: 1.5rem;     /* 24px */
    --spacing-xl: 2rem;       /* 32px */
    --spacing-2xl: 3rem;      /* 48px */
    --spacing-3xl: 4rem;      /* 64px */
    
    /* Border Radius */
    --radius-sm: 0.375rem;    /* 6px */
    --radius-md: 0.5rem;      /* 8px */
    --radius-lg: 0.75rem;     /* 12px */
    --radius-xl: 1rem;        /* 16px */
    --radius-2xl: 1.5rem;     /* 24px */
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

/* Dark mode variables */
[data-theme="dark"] {
    --color-background: #0F172A;
    --color-surface: #1E293B;
    --color-surface-hover: #334155;
    --color-border: #334155;
    --color-border-hover: #475569;
    --color-text-primary: #F8FAFC;
    --color-text-secondary: #CBD5E1;
    --color-text-muted: #94A3B8;
}

/* Base Styles */
html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-background);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Navigation Bar */
.navbar {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(8px);
    transition: all var(--transition-normal);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand .brand-logo-link {
    text-decoration: none;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav-brand .brand-logo-link:hover {
    transform: translateY(-1px);
}

.brand-logo-icon {
    width: 32px;
    height: 32px;
    transition: all var(--transition-fast);
}

.nav-brand .brand-logo-link:hover .brand-logo-icon {
    transform: scale(1.05);
}

.nav-brand .brand-logo {
    font-size: 1.75rem;
    font-weight: var(--font-weight-bold);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.025em;
    transition: all var(--transition-fast);
    margin: 0;
}

.nav-brand .brand-logo-link:hover .brand-logo {
    background: linear-gradient(135deg, #5B5CFF, #10B981);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.dark-mode-toggle {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    color: var(--color-text-secondary);
}

.dark-mode-toggle:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-border-hover);
    color: var(--color-text-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.dark-mode-toggle .moon-icon {
    display: none;
}

[data-theme="dark"] .dark-mode-toggle .sun-icon {
    display: none;
}

[data-theme="dark"] .dark-mode-toggle .moon-icon {
    display: block;
}

/* Container */
.container {
    max-width: 768px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-lg);
}

/* Hero Section */
.hero-section {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.hero-title {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.025em;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Main Content */
.main-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

/* Input Card */
.input-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.input-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
}

.input-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-border-hover);
}

/* Tab Navigation */
.tab-navigation {
    display: flex;
    background: var(--color-background);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xs);
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: none;
    border: none;
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
    flex: 1;
    justify-content: center;
    z-index: 2;
}

.tab-btn:hover {
    color: var(--color-text-primary);
    background-color: rgba(99, 102, 241, 0.05);
}

.tab-btn.active {
    color: var(--color-primary);
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
    font-weight: var(--font-weight-semibold);
}

.tab-icon {
    font-size: 1rem;
}

/* Tab Content */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Source Instructions */
.source-instructions {
    background: rgba(99, 102, 241, 0.05);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.source-instructions p {
    margin: 0 0 var(--spacing-md) 0;
    color: var(--color-text-primary);
    font-weight: var(--font-weight-medium);
}

.source-instructions ul,
.source-instructions ol {
    margin: var(--spacing-sm) 0 0 var(--spacing-lg);
    color: var(--color-text-secondary);
}

.source-instructions li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.5;
}

/* Input Group */
.input-group {
    margin-bottom: var(--spacing-lg);
}

.input-label {
    display: block;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
    letter-spacing: 0.025em;
}

/* Textareas */
.url-textarea,
.source-textarea {
    width: 100%;
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    line-height: 1.6;
    resize: vertical;
    transition: all var(--transition-normal);
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    background: var(--color-surface);
    color: var(--color-text-primary);
    box-shadow: var(--shadow-sm);
}

.url-textarea {
    min-height: 200px;
}

.source-textarea {
    min-height: 300px;
    font-size: 0.8125rem;
}

.url-textarea:focus,
.source-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1), var(--shadow-md);
    transform: translateY(-1px);
}

.url-textarea::placeholder,
.source-textarea::placeholder {
    color: var(--color-text-muted);
    font-style: italic;
}

/* Input Info */
.input-info {
    margin-top: var(--spacing-sm);
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    text-align: right;
}

/* Extract Button */
.extract-btn {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
    border: none;
    padding: var(--spacing-lg) var(--spacing-2xl);
    border-radius: var(--radius-xl);
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    letter-spacing: 0.025em;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    width: 100%;
    min-height: 56px;
}

.extract-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.extract-btn:hover::before {
    left: 100%;
}

.extract-btn:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.extract-btn:active {
    transform: translateY(-1px) scale(1.01);
}

.extract-btn:disabled {
    background: var(--color-text-muted);
    cursor: not-allowed;
    transform: none;
    box-shadow: var(--shadow-sm);
}

.extract-btn:disabled:hover {
    transform: none;
    box-shadow: var(--shadow-sm);
}

.btn-loader {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.btn-loader::after {
    content: '';
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Clear Input Button */
.clear-input-btn {
    background: var(--color-surface);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    width: 100%;
    min-height: 44px;
    opacity: 0.8;
}

.clear-input-btn:hover {
    background: var(--color-error);
    color: white;
    border-color: var(--color-error);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
    opacity: 1;
}

.clear-input-btn .btn-icon {
    font-size: 0.875rem;
    opacity: 0.8;
}

.clear-input-btn:hover .btn-icon {
    opacity: 1;
}

/* Helper Text */
.helper-text {
    text-align: center;
    margin-top: var(--spacing-xl);
}

.helper-note {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
    max-width: 600px;
    margin: 0 auto;
}

/* Footer */
.footer {
    margin-top: 5px;
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--color-border);
    background: var(--color-surface);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.footer-contact {
    margin-bottom: var(--spacing-sm);
}

.footer-contact p {
    color: var(--color-text-muted);
    font-size: 0.8125rem;
    line-height: 1.5;
    margin: 0;
}

.contact-email {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.8125rem;
    transition: color var(--transition-fast);
}

.contact-email:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

.footer-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--color-primary);
}

.footer-copyright {
    color: var(--color-text-muted);
    font-size: 0.8125rem;
    line-height: 1.5;
}

/* Results Section */
.results-section {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.results-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-success), var(--color-secondary));
    border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
}

.results-title {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-xl);
    color: var(--color-text-primary);
    text-align: center;
}

.results-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

/* Modern Help Tooltip System */
.help-icon-container {
    position: relative;
    display: inline-block;
    margin-left: var(--spacing-sm);
}

.help-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: var(--font-weight-bold);
    cursor: help;
    transition: all var(--transition-fast);
    outline: none;
    box-shadow: var(--shadow-sm);
}

.help-icon:hover,
.help-icon:focus {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.help-tooltip {
    position: absolute;
    top: calc(100% + 12px);
    left: 50%;
    transform: translateX(-50%);
    width: 280px;
    max-width: calc(100vw - 2rem);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-xl);
    box-shadow: 
        0 20px 25px -5px rgba(0, 0, 0, 0.1),
        0 10px 10px -5px rgba(0, 0, 0, 0.04),
        0 0 0 1px rgba(0, 0, 0, 0.05);
    opacity: 0;
    visibility: hidden;
    transform: translateX(-50%) translateY(-8px) scale(0.95);
    transition: all var(--transition-normal);
    z-index: 10000;
    pointer-events: none;
}

.help-tooltip::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-bottom-color: rgba(255, 255, 255, 0.95);
    filter: drop-shadow(0 -2px 4px rgba(0, 0, 0, 0.1));
}

.tooltip-header {
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    padding: var(--spacing-md) var(--spacing-lg) var(--spacing-sm);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tooltip-content {
    font-size: 0.8125rem;
    line-height: 1.5;
    color: var(--color-text-secondary);
    padding: var(--spacing-md) var(--spacing-lg) var(--spacing-lg);
}

.help-icon:hover + .help-tooltip,
.help-icon:focus + .help-tooltip,
.help-icon-container:hover .help-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0) scale(1);
    pointer-events: auto;
}

/* Dark mode support */
[data-theme="dark"] .help-tooltip {
    background: rgba(30, 41, 59, 0.95);
    border-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .help-tooltip::before {
    border-bottom-color: rgba(30, 41, 59, 0.95);
}

[data-theme="dark"] .tooltip-header {
    border-bottom-color: rgba(255, 255, 255, 0.1);
    color: var(--color-text-primary);
    -webkit-text-fill-color: var(--color-text-primary);
}

/* Responsive tooltip */
@media (max-width: 768px) {
    .help-tooltip {
        width: calc(100vw - 3rem);
        max-width: 280px;
    }
    
    .tooltip-header {
        font-size: 0.8125rem;
        padding: var(--spacing-sm) var(--spacing-md) var(--spacing-xs);
    }
    
    .tooltip-content {
        font-size: 0.75rem;
        padding: var(--spacing-sm) var(--spacing-md) var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .help-tooltip {
        width: calc(100vw - 2rem);
        max-width: 260px;
        /* Keep same positioning - below the icon */
        top: calc(100% + 8px);
    }
    
    .tooltip-header {
        font-size: 0.75rem;
        padding: var(--spacing-xs) var(--spacing-sm) var(--spacing-xs);
    }
    
    .tooltip-content {
        font-size: 0.7rem;
        line-height: 1.4;
        padding: var(--spacing-xs) var(--spacing-sm) var(--spacing-sm);
    }
    
    .help-icon {
        width: 20px;
        height: 20px;
        font-size: 0.8125rem;
    }
}

.remove-duplicates-btn {
    background: var(--color-surface);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow-sm);
}

.remove-duplicates-btn:hover {
    background: var(--color-warning);
    color: white;
    border-color: var(--color-warning);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.remove-duplicates-btn .btn-icon {
    font-size: 0.875rem;
}

.results-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

/* Result Item */
.result-item {
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.result-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-border-hover);
}

.result-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.result-title {
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
    word-break: break-word;
}

.result-url {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    word-break: break-all;
}

.result-videos {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Video Source */
.video-source {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-normal);
    position: relative;
}

.video-source:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    transform: translateX(2px);
}

.video-info {
    flex: 1;
    margin-right: var(--spacing-lg);
}

.video-title {
    display: block;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
}

.video-url {
    display: block;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    word-break: break-all;
}

.video-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.action-btn {
    background: var(--color-surface);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.8125rem;
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    white-space: nowrap;
}

.action-btn:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

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

.btn-icon {
    font-size: 0.75rem;
}

/* Export Section */
.export-section {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.export-btn {
    background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.export-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Loading Section */
.loading-section {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-3xl) var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.loading-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
    animation: loading-gradient 2s linear infinite;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--color-border);
    border-top: 3px solid var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-lg);
}

.loading-text {
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.loading-progress {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* Error Section */
.error-section {
    background: var(--color-surface);
    border: 1px solid var(--color-error);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-3xl) var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.error-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-error);
    border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
}

.error-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
}

.error-title {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-error);
    margin-bottom: var(--spacing-md);
}

.error-message {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.retry-btn {
    background: var(--color-error);
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.retry-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Animations */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes loading-gradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes fadeIn {
    from { 
        opacity: 0; 
        transform: translateY(20px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

.fade-in {
    animation: fadeIn 0.5s ease-out;
}

/* Utility Classes */
.url-count-error {
    color: var(--color-error) !important;
    font-weight: var(--font-weight-bold);
}

.no-videos-message {
    background: var(--color-background);
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
    color: var(--color-text-muted);
    font-style: italic;
    padding: var(--spacing-xl);
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
    animation: modalOverlayFadeIn 0.3s ease-out;
}

/* History Modal Overlay - allows page scrolling with taller modals */
.modal-overlay.history-modal {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    min-height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    z-index: 1000;
    backdrop-filter: blur(4px);
    padding: 2rem 0;
}

.modal-content {
    background: var(--color-surface);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-border);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    animation: modalSlideIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    overflow: hidden;
}

.modal-content.large {
    max-width: 800px;
    width: 95%;
    max-height: 95vh;
    height: 85vh;
}

.modal-content.history {
    max-width: 800px;
    width: 95%;
    max-height: none;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    min-height: 80vh;
}

/* History modal specific body styling */
.modal-content.history .modal-body {
    flex: 1;
    overflow-y: visible;
    min-height: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: white;
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.modal-body {
    padding: var(--spacing-xl);
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
    padding: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
    background: var(--color-background);
}

.modal-btn {
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-width: 100px;
}

.modal-btn.primary {
    background: var(--color-primary);
    color: white;
}

.modal-btn.primary:hover {
    background: #5856EB;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.modal-btn.secondary {
    background: var(--color-border);
    color: var(--color-text-primary);
}

.modal-btn.secondary:hover {
    background: var(--color-border-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* Modal Input Elements */
.folder-input {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    transition: all var(--transition-normal);
    background: var(--color-surface);
    color: var(--color-text-primary);
}

.folder-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.input-hint {
    margin-top: var(--spacing-sm);
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    font-style: italic;
}

.batch-display-area {
    flex: 1;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    background: var(--color-background);
}

.batch-textarea {
    width: 100%;
    flex: 1;
    padding: var(--spacing-lg);
    border: none;
    outline: none;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.8125rem;
    line-height: 1.6;
    resize: none;
    background: transparent;
    color: var(--color-text-primary);
    box-sizing: border-box;
    overflow-y: auto;
    min-height: 200px;
}

/* Progress Dialog Styles */
.progress-dialog {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    backdrop-filter: blur(4px);
}

.progress-content {
    background: var(--color-surface);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-2xl);
    min-width: 400px;
    max-width: 500px;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-border);
}

.progress-content h3 {
    margin: 0 0 var(--spacing-lg) 0;
    color: var(--color-text-primary);
    text-align: center;
    font-weight: var(--font-weight-bold);
}

.progress-warning {
    background-color: #fff3cd;
    color: #856404;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid #ffeaa7;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    text-align: center;
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
}

[data-theme="dark"] .progress-warning {
    background-color: #2d2111;
    color: #ffeaa7;
    border-color: #3d2f17;
}

.progress-info {
    margin-bottom: var(--spacing-lg);
}

.progress-info div {
    margin-bottom: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

#progressStatus {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}

#progressDetails {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.progress-bar {
    width: 100%;
    height: 20px;
    background-color: var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-success), var(--color-secondary));
    transition: width 0.3s ease;
    border-radius: var(--radius-lg);
}

#progressText {
    text-align: center;
    font-weight: var(--font-weight-bold);
    font-size: 1.125rem;
    color: var(--color-text-primary);
    margin: var(--spacing-md) 0;
    padding: var(--spacing-sm);
    min-height: 28px;
    line-height: 28px;
}

#progressWarnings {
    max-height: 100px;
    overflow-y: auto;
    margin-bottom: var(--spacing-lg);
}

.warning {
    background-color: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: var(--color-warning);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    font-size: 0.8125rem;
}

.cancel-btn {
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--color-error);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    transition: all var(--transition-fast);
}

.cancel-btn:hover {
    background-color: #DC2626;
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* Relative URL Modal Styles */
.relative-url-list {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
    max-height: 120px;
    overflow-y: auto;
}

.relative-url-list li {
    margin: var(--spacing-xs) 0;
    color: var(--color-warning);
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.8125rem;
    word-break: break-all;
}

.base-url-field {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    transition: all var(--transition-normal);
    background: var(--color-surface);
    color: var(--color-text-primary);
}

.base-url-field:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 var(--spacing-md);
    }
    
    .container {
        padding: var(--spacing-xl) var(--spacing-md);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .input-card {
        padding: var(--spacing-xl);
    }
    
    .tab-btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.8125rem;
    }
    
    .clear-input-btn {
        font-size: 0.8125rem;
        min-height: 42px;
    }
    
    .video-source {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-md);
    }
    
    .video-info {
        margin-right: 0;
    }
    
    .video-actions {
        justify-content: center;
    }
    
    .action-btn {
        flex: 1;
        justify-content: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .modal-content {
        margin: var(--spacing-lg);
        max-height: 85vh;
    }
    
    .modal-footer {
        flex-direction: column;
    }
    
    .modal-btn {
        width: 100%;
    }
    
    .progress-content {
        min-width: auto;
        margin: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .container {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
    
    .input-card {
        padding: var(--spacing-lg);
        border-radius: var(--radius-xl);
    }
    
    .url-textarea,
    .source-textarea {
        padding: var(--spacing-md);
    }
    
    .extract-btn {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 0.875rem;
    }
    
    .clear-input-btn {
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: 0.8125rem;
        min-height: 40px;
        margin-top: var(--spacing-sm);
    }
    
    .clear-input-btn .btn-icon {
        font-size: 0.75rem;
    }
    
    .result-item {
        padding: var(--spacing-lg);
    }
    
    /* Results Controls responsive */
    .results-controls {
        flex-direction: column;
        gap: var(--spacing-md);
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .input-card,
    .results-section,
    .loading-section,
    .error-section {
        border-width: 2px;
    }
    
    .url-textarea,
    .source-textarea {
        border-width: 2px;
    }
    
    .result-item,
    .video-source {
        border-width: 2px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .loading-spinner {
        animation: none;
        border: 3px solid var(--color-primary);
    }
}

/* Notification Styles */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    z-index: 10000;
    opacity: 0;
    transform: translateX(100%);
    transition: all var(--transition-normal);
    font-weight: var(--font-weight-medium);
    border: 1px solid transparent;
}

.notification-error {
    background: var(--color-error);
    color: white;
    border-color: #DC2626;
}

.notification-success {
    background: var(--color-success);
    color: white;
    border-color: #059669;
}

.notification-info {
    background: var(--color-primary);
    color: white;
    border-color: #5856EB;
}

/* Animation keyframes for modals */
@keyframes modalOverlayFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ========== 历史记录功能样式 ========== */

/* History Settings in Footer */
.history-settings {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-lg);
    background: rgba(99, 102, 241, 0.05);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
}

.history-toggle-container {
    display: flex;
    justify-content: center;
    width: 100%;
}

.history-toggle-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    cursor: pointer;
    user-select: none;
}

.history-checkbox {
    display: none;
}

.history-toggle-slider {
    position: relative;
    width: 52px;
    height: 28px;
    background: var(--color-border);
    border-radius: 14px;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.history-toggle-slider::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.history-checkbox:checked + .history-toggle-slider {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
}

.history-checkbox:checked + .history-toggle-slider::before {
    transform: translateX(24px);
}

.history-toggle-text {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.toggle-title {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    font-size: 0.875rem;
}

.toggle-description {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    line-height: 1.4;
}

.history-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

.history-action-btn {
    background: var(--color-surface);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-size: 0.8125rem;
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    text-decoration: none;
}

.history-action-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.history-action-btn.view-btn:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.history-action-btn.clear-btn:hover {
    background: var(--color-error);
    color: white;
    border-color: var(--color-error);
}

/* Top Domains Section */
.top-domains-section {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    margin: var(--spacing-xl) 0;
    box-shadow: var(--shadow-lg);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.top-domains-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-secondary), var(--color-primary));
    border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
}

.top-domains-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
}

.top-domains-title {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin: 0;
}

.top-domains-subtitle {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin: 0;
}

.top-domains-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    align-items: center;
    max-width: 800px;
    width: 100%;
    justify-content: center;
}

.domain-tag {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, var(--color-surface), #f8fafc);
    border: 2px solid var(--color-border);
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    min-height: 60px;
    width: 100%;
}


.domain-tag:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
    background: linear-gradient(135deg, #ffffff, #f1f5f9);
}

.domain-tag:active {
    transform: translateY(-1px) scale(1.01);
    box-shadow: var(--shadow-md);
}

.domain-name {
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex: 1;
    min-width: 0;
}

.domain-name::before {
    content: '🌐';
    font-size: 1.2rem;
    opacity: 0.8;
}

.domain-name-text {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.domain-count {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-lg);
    font-size: 0.75rem;
    font-weight: var(--font-weight-bold);
    min-width: 32px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.domain-count::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.domain-tag:hover .domain-count::before {
    left: 100%;
}

/* Dark mode support for domain tags */
[data-theme="dark"] .domain-tag {
    background: linear-gradient(135deg, var(--color-surface), #1e293b);
    border-color: var(--color-border);
}

[data-theme="dark"] .domain-tag:hover {
    background: linear-gradient(135deg, #334155, #475569);
    border-color: var(--color-primary);
}

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

/* History Modal Styles - Optimized for maximum content visibility */
.history-summary {
    margin-bottom: var(--spacing-xs);
    padding: var(--spacing-sm);
    background: var(--color-background);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.history-stats {
    display: flex;
    justify-content: space-around;
    gap: var(--spacing-xs);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    flex: 1;
    min-width: 0;
}

.stat-number {
    font-size: 1rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    white-space: nowrap;
}

.stat-label {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    text-align: left;
    line-height: 1.2;
}

.history-filters {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-background);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.filter-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    flex: 1;
}

.filter-group label {
    font-size: 0.7rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    white-space: nowrap;
}

.history-filter-select {
    padding: var(--spacing-xs);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-text-primary);
    font-size: 0.7rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    flex: 1;
    min-width: 0;
}

.history-filter-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.history-list-container {
    flex: 1;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-background);
    overflow: visible;
    display: flex;
    flex-direction: column;
    min-height: auto;
    margin-top: var(--spacing-xs);
}

.history-list {
    flex: 1;
    overflow-y: visible;
    padding: var(--spacing-xs);
    min-height: auto;
}

.history-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3xl);
    gap: var(--spacing-md);
    text-align: center;
    min-height: 200px;
    flex: 1;
}

.empty-icon {
    font-size: 3rem;
    opacity: 0.6;
}

.empty-title {
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}

.empty-description {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    max-width: 300px;
    line-height: 1.5;
}

.history-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.history-item:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
    transform: translateX(1px);
}

.history-item:last-child {
    margin-bottom: 0;
}

.history-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xs);
}

.history-type {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.type-icon {
    font-size: 0.8rem;
}

.type-label {
    font-size: 0.65rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    background: var(--color-background);
    padding: 2px var(--spacing-xs);
    border-radius: var(--radius-sm);
}

.history-time {
    font-size: 0.6rem;
    color: var(--color-text-muted);
    font-weight: var(--font-weight-medium);
}

.history-content {
    margin-bottom: var(--spacing-xs);
}

.content-preview {
    font-size: 0.7rem;
    color: var(--color-text-secondary);
    line-height: 1.3;
    margin-bottom: var(--spacing-xs);
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    background: var(--color-background);
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    word-break: break-all;
}

.content-metadata {
    margin-bottom: var(--spacing-xs);
    min-height: 20px; /* Ensure consistent spacing even when empty */
}

/* New metadata system for page sources only */
.metadata-info {
    display: flex;
    flex-wrap: wrap;
    gap: 2px;
    align-items: center;
}

.metadata-tag {
    color: white;
    padding: 1px var(--spacing-xs);
    border-radius: var(--radius-sm);
    font-size: 0.6rem;
    font-weight: var(--font-weight-medium);
    white-space: nowrap;
}

.metadata-tag.count-tag {
    background: var(--color-primary);
}

.metadata-tag.size-tag {
    background: var(--color-warning);
}

.metadata-tag.title-tag {
    background: var(--color-text-secondary);
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Original domain tags styling for batch URLs (restored) */
.domain-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 2px;
    margin-bottom: var(--spacing-xs);
}

.domain-tag-small {
    background: var(--color-secondary);
    color: white;
    padding: 1px var(--spacing-xs);
    border-radius: var(--radius-sm);
    font-size: 0.6rem;
    font-weight: var(--font-weight-medium);
}

.history-actions {
    display: flex;
    gap: var(--spacing-xs);
    justify-content: flex-end;
}

.history-action-btn {
    background: var(--color-surface);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
    padding: 2px var(--spacing-xs);
    border-radius: var(--radius-sm);
    font-size: 0.6rem;
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 2px;
}

.history-action-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.history-action-btn.use-btn:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.history-action-btn.delete-btn:hover {
    background: var(--color-error);
    color: white;
    border-color: var(--color-error);
}

/* Responsive Design for History Features */
@media (max-width: 768px) {
    .history-settings {
        padding: var(--spacing-md);
    }
    
    .history-toggle-label {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .history-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .history-action-btn {
        justify-content: center;
        width: 100%;
        padding: var(--spacing-md);
    }
    
    .top-domains-grid {
        grid-template-columns: 1fr;
        max-width: 100%;
        gap: var(--spacing-sm);
    }
    
    .domain-tag {
        font-size: 0.8125rem;
        padding: var(--spacing-md) var(--spacing-lg);
        min-height: 50px;
    }
    
    .domain-name::before {
        font-size: 1rem;
    }
    
    .domain-count {
        font-size: 0.7rem;
        padding: var(--spacing-xs) var(--spacing-sm);
        min-width: 28px;
    }
    
    .history-filters {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .history-stats {
        gap: var(--spacing-xs);
    }
    
    .stat-item {
        flex-direction: column;
        text-align: center;
        gap: 2px;
    }
    
    .stat-number {
        font-size: 0.9rem;
    }
    
    .stat-label {
        font-size: 0.6rem;
    }
    
    .history-filters {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .filter-group {
        justify-content: space-between;
    }
    
    .filter-group label {
        font-size: 0.65rem;
        min-width: 60px;
    }
    
    .history-filter-select {
        font-size: 0.65rem;
    }
    
    .history-item {
        padding: var(--spacing-xs);
    }
    
    .history-item-header {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-xs);
    }
    
    .history-type {
        justify-content: center;
    }
    
    .content-preview {
        font-size: 0.65rem;
    }
    
    .history-actions {
        justify-content: center;
        gap: var(--spacing-sm);
    }
    
    .history-action-btn {
        padding: var(--spacing-xs);
        font-size: 0.65rem;
    }
    
    .modal-content.large {
        width: 98%;
        max-height: 95vh;
        margin: var(--spacing-sm);
    }
    
    .history-list-container {
        min-height: 250px;
    }
    
    /* History modal mobile optimization */
    .modal-overlay.history-modal {
        padding: 1rem 0;
    }
    
    .modal-content.history {
        margin: 0 auto;
        width: 98%;
        min-height: 70vh;
    }
}

@media (max-width: 480px) {
    .history-settings {
        margin: var(--spacing-md) 0;
        padding: var(--spacing-xs);
    }
    
    .toggle-title {
        font-size: 0.75rem;
    }
    
    .toggle-description {
        font-size: 0.65rem;
    }
    
    .history-action-btn {
        font-size: 0.7rem;
        padding: var(--spacing-xs);
    }
    
    .top-domains-section {
        padding: var(--spacing-md);
        margin: var(--spacing-sm) 0;
    }
    
    .top-domains-title {
        font-size: 1rem;
    }
    
    .top-domains-subtitle {
        font-size: 0.75rem;
    }
    
    .domain-tag {
        font-size: 0.75rem;
        padding: var(--spacing-sm) var(--spacing-md);
        min-height: 48px;
    }
    
    .domain-name::before {
        font-size: 0.9rem;
    }
    
    .domain-count {
        font-size: 0.65rem;
        padding: 2px var(--spacing-xs);
        min-width: 24px;
    }
    
    .history-list {
        padding: var(--spacing-xs);
    }
    
    .history-summary {
        padding: var(--spacing-xs);
        margin-bottom: 2px;
    }
    
    .history-filters {
        padding: var(--spacing-xs);
        margin-bottom: 2px;
    }
    
    .content-preview {
        font-size: 0.6rem;
        padding: 2px;
        line-height: 1.2;
    }
    
    .domain-tag-small {
        font-size: 0.55rem;
        padding: 1px 4px;
    }
    
    .history-action-btn {
        font-size: 0.6rem;
        padding: 2px 6px;
    }
}