/* ==========================================
   Global Mobile Inventors - 2026 Dark Theme
   Cutting-edge design with animated gradients,
   glassmorphism, and fluid micro-interactions
   ========================================== */

/* CSS Custom Properties */
:root {
    /* Dark backgrounds with depth */
    --bg-primary: #050508;
    --bg-secondary: #0a0a0f;
    --bg-tertiary: #111118;
    --bg-card: rgba(20, 20, 30, 0.6);
    --bg-elevated: rgba(30, 30, 45, 0.8);

    /* Vibrant accent colors */
    --accent-cyan: #00D4FF;
    --accent-pink: #FF6B9D;
    --accent-coral: #FF6B6B;
    --accent-mint: #4ECDC4;
    --accent-yellow: #FFE66D;
    --accent-purple: #A855F7;
    --accent-blue: #3B82F6;

    /* Text colors */
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --text-accent: var(--accent-cyan);

    /* Borders and dividers */
    --border-subtle: rgba(255, 255, 255, 0.04);
    --border-light: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(0, 212, 255, 0.2);

    /* Glows */
    --glow-cyan: 0 0 40px rgba(0, 212, 255, 0.25);
    --glow-pink: 0 0 40px rgba(255, 107, 157, 0.25);
    --glow-purple: 0 0 60px rgba(168, 85, 247, 0.2);

    /* Glass effect */
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-blur: 20px;

    /* Typography */
    --font-display: 'Space Grotesk', 'Inter', -apple-system, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 5rem;

    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    scroll-padding-top: 70px;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* ==========================================
   Animated Background
   ========================================== */
.bg-animation {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.bg-gradient {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.5;
    animation: float-gradient 20s ease-in-out infinite;
}

.bg-gradient-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.15), transparent 70%);
    top: -200px;
    left: -100px;
    animation-delay: 0s;
}

.bg-gradient-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(168, 85, 247, 0.12), transparent 70%);
    top: 50%;
    right: -150px;
    animation-delay: -7s;
}

.bg-gradient-3 {
    width: 450px;
    height: 450px;
    background: radial-gradient(circle, rgba(255, 107, 157, 0.1), transparent 70%);
    bottom: -100px;
    left: 30%;
    animation-delay: -14s;
}

@keyframes float-gradient {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(50px, -30px) scale(1.1); }
    50% { transform: translate(-30px, 50px) scale(0.95); }
    75% { transform: translate(-50px, -20px) scale(1.05); }
}

/* Typography */
h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.75rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
h4 { font-size: 1.125rem; }

a {
    color: var(--accent-cyan);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-mint);
}

/* ==========================================
   Hero Section
   ========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: var(--space-2xl);
    position: relative;
    overflow: hidden;
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0, 212, 255, 0.15), transparent),
        radial-gradient(ellipse 60% 40% at 80% 60%, rgba(168, 85, 247, 0.1), transparent),
        radial-gradient(ellipse 50% 30% at 20% 80%, rgba(255, 107, 157, 0.08), transparent),
        var(--bg-primary);
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    opacity: 0.03;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: var(--radius-full);
    padding: var(--space-sm) var(--space-lg);
    font-size: 0.8125rem;
    color: var(--accent-cyan);
    margin-bottom: var(--space-xl);
    animation: pulse-glow 3s ease-in-out infinite;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-cyan);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 20px rgba(0, 212, 255, 0.1); }
    50% { box-shadow: 0 0 30px rgba(0, 212, 255, 0.2); }
}

.hero h1 {
    margin-bottom: var(--space-lg);
    background: linear-gradient(135deg, #fff 0%, var(--accent-cyan) 50%, var(--accent-mint) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 8s ease infinite;
    background-size: 200% 200%;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.paper-citation {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-style: italic;
    margin-bottom: var(--space-md);
}

.paper-citation a {
    color: var(--accent-cyan);
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.paper-citation a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

.hero .subtitle {
    font-size: clamp(1rem, 2.5vw, 1.35rem);
    color: var(--text-secondary);
    max-width: 650px;
    margin: 0 auto var(--space-3xl);
    font-weight: 400;
}

.hero-stats {
    display: flex;
    gap: var(--space-lg);
    justify-content: center;
    flex-wrap: wrap;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--space-xl) var(--space-2xl);
    min-width: 200px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-cyan);
    box-shadow: var(--glow-cyan);
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-value {
    display: block;
    font-family: var(--font-display);
    font-size: 2.75rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    letter-spacing: -0.03em;
}

.stat-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-top: var(--space-sm);
}

.stat-period {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: var(--space-xs);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-2xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-muted);
    font-size: 0.875rem;
    animation: float 3s ease-in-out infinite;
}

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

/* ==========================================
   Navigation
   ========================================== */
.main-nav {
    position: sticky;
    top: 0;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    z-index: 100;
}

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

.nav-logo {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-mint));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: var(--space-sm);
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-cyan);
    transition: all var(--transition-fast);
    transform: translateX(-50%);
}

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

.nav-link.active {
    color: var(--accent-cyan);
}

.nav-link.active::after {
    width: 60%;
}

/* ==========================================
   Nav Divider
   ========================================== */
.nav-divider {
    width: 1px;
    height: 24px;
    background: var(--border-light);
    margin: 0 var(--space-sm);
}

/* ==========================================
   Technology Combobox (Searchable Dropdown)
   ========================================== */
.tech-combobox {
    position: relative;
    z-index: 110;
}

.tech-combobox-trigger {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-full);
    padding: var(--space-xs) var(--space-sm) var(--space-xs) var(--space-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-width: 200px;
}

.tech-combobox-trigger:hover,
.tech-combobox.open .tech-combobox-trigger {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.tech-combobox-icon {
    color: var(--accent-cyan);
    flex-shrink: 0;
}

.tech-combobox-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 500;
    min-width: 0;
}

.tech-combobox-input::placeholder {
    color: var(--text-secondary);
}

.tech-combobox-chevron {
    color: var(--text-muted);
    flex-shrink: 0;
    transition: transform var(--transition-fast);
}

.tech-combobox.open .tech-combobox-chevron {
    transform: rotate(180deg);
}

.tech-combobox-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    min-width: 280px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: var(--space-xs);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5), 0 0 1px rgba(255, 255, 255, 0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition-fast);
}

.tech-combobox.open .tech-combobox-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.tech-option {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tech-option:hover,
.tech-option.highlighted {
    background: rgba(0, 212, 255, 0.1);
}

.tech-option.selected {
    background: rgba(0, 212, 255, 0.15);
}

.tech-option.hidden {
    display: none;
}

.tech-option-code {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-mint));
    color: var(--bg-primary);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.tech-option-name {
    font-size: 0.875rem;
    color: var(--text-primary);
}

/* Hierarchical tech dropdown styles */
.tech-divider {
    height: 1px;
    background: var(--border-light);
    margin: var(--space-xs) 0;
}

.tech-option.section-header {
    font-weight: 600;
    margin-top: var(--space-xs);
    padding-left: var(--space-sm);
}

.tech-option.section-header .tech-option-code {
    background: var(--accent-cyan);
    color: var(--bg-primary);
    font-weight: 700;
}

.tech-option.subclass {
    padding-left: calc(var(--space-sm) + 28px);
}

.tech-option.subclass .tech-option-code {
    width: 44px;
    font-size: 0.7rem;
    background: rgba(255, 255, 255, 0.06);
}

.tech-option.subclass .tech-option-name {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.tech-option.subclass:hover .tech-option-name,
.tech-option.subclass.highlighted .tech-option-name {
    color: var(--text-primary);
}

/* Collapsible section styles */
.section-subclasses {
    overflow: hidden;
    transition: max-height 0.25s ease-out, opacity 0.2s ease-out;
    max-height: 2000px;
    opacity: 1;
}

.section-subclasses.collapsed {
    max-height: 0;
    opacity: 0;
}

.section-subclasses.searching {
    max-height: none;
    opacity: 1;
}

.section-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    padding: 0;
    margin-right: var(--space-xs);
    background: rgba(255, 255, 255, 0.06);
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.section-toggle:hover {
    background: rgba(0, 212, 255, 0.15);
    color: var(--accent-cyan);
}

.section-toggle .toggle-icon {
    transition: transform 0.2s ease;
}

.section-toggle.expanded .toggle-icon {
    transform: rotate(90deg);
}

.subclass-count {
    margin-left: auto;
    font-size: 0.7rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.06);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
}

.tech-combobox-dropdown {
    max-height: 400px;
    overflow-y: auto;
}

/* Custom scrollbar for dropdown */
.tech-combobox-dropdown::-webkit-scrollbar {
    width: 6px;
}

.tech-combobox-dropdown::-webkit-scrollbar-track {
    background: transparent;
}

.tech-combobox-dropdown::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

.tech-combobox-dropdown::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

.tech-combobox-trigger.has-selection .tech-combobox-input {
    color: var(--accent-cyan);
}

@media (max-width: 768px) {
    .nav-divider {
        display: none;
    }

    .tech-combobox {
        width: 100%;
        margin-top: var(--space-sm);
    }

    .tech-combobox-trigger {
        width: 100%;
        min-width: unset;
    }

    .tech-combobox-dropdown {
        min-width: unset;
    }
}

/* ==========================================
   Sections
   ========================================== */
.section {
    padding: var(--space-3xl) var(--space-xl);
    max-width: 1400px;
    margin: 0 auto;
}

.section-dark {
    background: var(--bg-secondary);
    max-width: 100%;
}

.section-dark > * {
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-tag {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: var(--radius-full);
    padding: var(--space-xs) var(--space-md);
    margin-bottom: var(--space-md);
}

.section-header h2 {
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.section-header p {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.0625rem;
}

/* ==========================================
   Controls
   ========================================== */
.controls {
    display: flex;
    gap: var(--space-xl);
    justify-content: center;
    align-items: flex-end;
    flex-wrap: wrap;
    margin-bottom: var(--space-xl);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.control-group.timeline-control {
    flex: 1;
    min-width: 400px;
}

.control-group label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.period-selector,
.metric-selector {
    display: flex;
    gap: 2px;
    background: var(--bg-tertiary);
    padding: 3px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
}

.period-btn,
.metric-btn {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.8125rem;
    font-weight: 500;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.period-btn:hover,
.metric-btn:hover {
    color: var(--text-primary);
    background: var(--bg-elevated);
}

.period-btn.active,
.metric-btn.active {
    background: var(--accent-cyan);
    color: var(--bg-primary);
    font-weight: 600;
}

.select-control {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.875rem;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    cursor: pointer;
    min-width: 150px;
    transition: border-color var(--transition-fast);
}

.select-control:hover,
.select-control:focus {
    border-color: var(--accent-cyan);
    outline: none;
}

/* ==========================================
   Timeline Player
   ========================================== */
.timeline-player {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    background: var(--bg-tertiary);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-subtle);
    min-width: 600px;
}

.play-btn {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-mint));
    border: none;
    border-radius: 50%;
    color: var(--bg-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
}

.play-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 212, 255, 0.4);
}

.play-btn:active {
    transform: scale(0.95);
}

.play-btn svg {
    width: 18px;
    height: 18px;
}

.timeline-track {
    flex: 1;
    position: relative;
    height: 60px;
}

.timeline-slider {
    position: absolute;
    top: 10px;
    left: 0;
    width: 100%;
    height: 8px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-elevated);
    border-radius: 4px;
    cursor: pointer;
    z-index: 2;
}

.timeline-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--accent-cyan);
    border-radius: 50%;
    cursor: grab;
    box-shadow: 0 2px 10px rgba(0, 212, 255, 0.4);
    transition: transform var(--transition-fast);
}

.timeline-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.timeline-slider::-webkit-slider-thumb:active {
    cursor: grabbing;
}

.timeline-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--accent-cyan);
    border: none;
    border-radius: 50%;
    cursor: grab;
    box-shadow: 0 2px 10px rgba(0, 212, 255, 0.4);
}

.timeline-progress {
    position: absolute;
    top: 10px;
    left: 0;
    height: 8px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-mint));
    border-radius: 4px;
    pointer-events: none;
    z-index: 1;
    transition: width 0.3s ease;
}

.timeline-markers {
    display: flex;
    justify-content: space-between;
    margin-top: 28px;
    padding: 0 2px;
}

.timeline-marker {
    font-size: 0.6875rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.timeline-marker:hover {
    color: var(--text-primary);
    background: var(--bg-elevated);
}

.timeline-marker.active {
    color: var(--accent-cyan);
    font-weight: 600;
}

.current-period {
    flex-shrink: 0;
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    min-width: 80px;
    text-align: center;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-mint));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@media (max-width: 900px) {
    .timeline-player {
        flex-direction: column;
        min-width: auto;
        width: 100%;
        gap: var(--space-md);
    }

    .timeline-track {
        width: 100%;
    }

    .timeline-markers {
        flex-wrap: wrap;
        gap: var(--space-xs);
        justify-content: center;
    }

    .current-period {
        order: -1;
    }
}

@media (max-width: 600px) {
    .timeline-marker {
        font-size: 0.6rem;
        padding: var(--space-xs);
    }
}

/* ==========================================
   Visualization Containers
   ========================================== */
.viz-container {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    margin-bottom: var(--space-xl);
    border: 1px solid var(--border-subtle);
}

.chart-area {
    width: 100%;
    min-height: 500px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.map-area {
    min-height: 550px;
}

.no-data {
    color: var(--text-muted);
    font-size: 1rem;
    text-align: center;
    padding: var(--space-2xl);
}

/* ==========================================
   Sankey Styles
   ========================================== */
.node-label {
    fill: var(--text-secondary);
    font-size: 11px;
    font-weight: 500;
    font-family: var(--font-body);
}

.sankey-link {
    transition: opacity var(--transition-fast);
}

.sankey-node rect {
    transition: all var(--transition-fast);
    cursor: pointer;
}

.sankey-node rect:hover {
    filter: brightness(1.2);
}

/* ==========================================
   Map Legend
   ========================================== */
.map-legend {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
}

.legend-gradient {
    width: 300px;
    height: 12px;
    border-radius: 6px;
}

.legend-gradient.inflows {
    background: linear-gradient(90deg, #1e293b, #0891b2, #00D4FF, #67e8f9);
}

.legend-gradient.outflows {
    background: linear-gradient(90deg, #1e293b, #dc2626, #FF6B6B, #fca5a5);
}

.legend-gradient.net {
    background: linear-gradient(90deg, #FF6B6B, #FFE66D, #4ECDC4);
}

.legend-labels {
    display: flex;
    justify-content: space-between;
    width: 300px;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.legend-note {
    font-size: 0.6875rem;
    color: var(--text-muted);
    margin-top: var(--space-xs);
    font-style: italic;
}

/* ==========================================
   Map Layout (Map + Country Details Side by Side)
   ========================================== */
.map-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: var(--space-xl);
    align-items: start;
}

.map-container {
    min-width: 0;
}

.country-details-panel {
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-subtle);
    padding: var(--space-xl);
    position: sticky;
    top: 80px;
    min-height: 300px;
}

.country-details-panel h4 {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--border-subtle);
}

.country-details-hint {
    color: var(--text-muted);
    font-size: 0.875rem;
    text-align: center;
    padding: var(--space-xl) 0;
}

.country-stats {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.country-stat {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.country-stat-value {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
}

.country-stat-value.inflow { color: var(--accent-cyan); }
.country-stat-value.outflow { color: var(--accent-coral); }
.country-stat-value.positive { color: var(--accent-mint); }
.country-stat-value.negative { color: var(--accent-coral); }

.country-stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.country-stat-sublabel {
    font-size: 0.6875rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.country-details-period {
    margin-top: var(--space-lg);
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-subtle);
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
}

.country-details-tech {
    font-size: 0.75rem;
    color: var(--accent-cyan);
    text-align: center;
    margin-top: var(--space-xs);
}

.country-inventor-total {
    font-size: 0.75rem;
    color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.1);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
    text-align: center;
}

/* ==========================================
   Sankey Layout (Sankey + Corridor Details Side by Side)
   ========================================== */
.sankey-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: var(--space-xl);
    align-items: start;
    margin-bottom: var(--space-xl);
}

.sankey-container {
    min-width: 0;
}

.corridor-details-panel {
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-subtle);
    padding: var(--space-xl);
    position: sticky;
    top: 120px;
    min-height: 280px;
}

.corridor-details-panel h4 {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--border-subtle);
}

.corridor-details-hint {
    color: var(--text-muted);
    font-size: 0.875rem;
    text-align: center;
    padding: var(--space-xl) 0;
}

.corridor-stats {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.corridor-stat {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.corridor-stat-value {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-cyan);
}

.corridor-stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.corridor-rank {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-mint));
    color: var(--bg-primary);
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
}

.corridor-details-period {
    margin-top: var(--space-lg);
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-subtle);
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
}

.corridor-details-tech {
    font-size: 0.75rem;
    color: var(--accent-cyan);
    text-align: center;
    margin-top: var(--space-xs);
}

.incomplete-warning {
    font-size: 0.7rem;
    color: #FFE66D;
    text-align: center;
    margin-top: var(--space-sm);
    padding: var(--space-xs) var(--space-sm);
    background: rgba(255, 230, 109, 0.1);
    border-radius: var(--radius-sm);
}

@media (max-width: 1024px) {
    .sankey-layout {
        grid-template-columns: 1fr;
    }

    .corridor-details-panel {
        position: static;
        min-height: auto;
    }

    .corridor-stats {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }

    .corridor-stat {
        flex: 1;
        min-width: 140px;
        flex-direction: column;
        text-align: center;
        gap: var(--space-sm);
    }
}

/* Display selector (Absolute/Share toggle) */
.display-selector {
    display: flex;
    gap: var(--space-xs);
}

.display-btn {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--border-subtle);
    background: transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    font-size: 0.8125rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.display-btn:hover {
    border-color: var(--accent-cyan);
    color: var(--text-primary);
}

.display-btn.active {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-mint));
    border-color: transparent;
    color: var(--bg-primary);
    font-weight: 600;
}

@media (max-width: 1024px) {
    .map-layout {
        grid-template-columns: 1fr;
    }

    .country-details-panel {
        position: static;
        min-height: auto;
    }

    .country-stats {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }

    .country-stat {
        flex: 1;
        min-width: 140px;
        flex-direction: column;
        text-align: center;
        gap: var(--space-sm);
    }
}

/* ==========================================
   Insight Box
   ========================================== */
.insight-box {
    display: flex;
    gap: var(--space-lg);
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.08), rgba(168, 85, 247, 0.08));
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--space-lg) var(--space-xl);
}

.insight-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.15);
    border-radius: var(--radius-md);
    color: var(--accent-cyan);
}

.insight-content h4 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-cyan);
    margin-bottom: var(--space-sm);
}

.insight-box h4 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-cyan);
    margin-bottom: var(--space-sm);
}

.insight-box p {
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.7;
}

.insight-box .highlight {
    color: var(--accent-cyan);
    font-weight: 600;
}

.insight-incomplete {
    display: block;
    margin-top: var(--space-sm);
    font-size: 0.8rem;
    color: #FFE66D;
    font-style: italic;
}

/* ==========================================
   Trends Section
   ========================================== */
.trends-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-2xl);
}

.trend-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    border: 1px solid var(--border-subtle);
}

.trend-card h4 {
    margin-bottom: var(--space-xs);
    color: var(--text-primary);
    font-weight: 500;
}

.chart-tech-filter {
    display: block;
    font-size: 0.75rem;
    color: var(--accent-cyan);
    margin-bottom: var(--space-md);
}

.chart-tech-filter:empty {
    display: none;
}

.viz-container .chart-tech-filter {
    position: absolute;
    top: var(--space-md);
    left: var(--space-md);
    z-index: 10;
    background: rgba(15, 23, 42, 0.8);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
}

.trend-chart {
    height: 250px;
}

/* Chart styling */
.axis text {
    fill: var(--text-muted);
    font-size: 11px;
}

.axis line,
.axis path {
    stroke: var(--border-light);
}

.grid line {
    stroke: var(--border-subtle);
}

.grid path {
    stroke: none;
}

.bar-label {
    fill: var(--text-secondary);
    font-size: 11px;
    font-weight: 600;
}

.chart-footnote {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-style: italic;
    margin-top: var(--space-md);
    text-align: center;
}

/* ==========================================
   Top Corridors Table
   ========================================== */
.top-corridors {
    margin-top: var(--space-2xl);
}

.top-corridors h3 {
    margin-bottom: var(--space-lg);
    color: var(--text-primary);
}

.corridors-table {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-subtle);
}

.corridors-table table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
}

.corridors-table th,
.corridors-table td {
    padding: var(--space-md) var(--space-lg);
    text-align: left;
    border-bottom: 1px solid var(--border-subtle);
    white-space: nowrap;
}

.corridors-table th {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: var(--bg-tertiary);
}

.corridors-table td {
    font-size: 0.875rem;
}

.corridors-table tr:hover td {
    background: var(--bg-tertiary);
}

.corridors-table .rank {
    color: var(--text-muted);
    font-weight: 600;
    width: 40px;
}

.corridor-origin {
    color: var(--accent-cyan);
    font-weight: 600;
}

.corridor-arrow {
    color: var(--text-muted);
    margin: 0 var(--space-sm);
}

.corridor-dest {
    color: var(--accent-mint);
    font-weight: 600;
}

.corridor-value {
    color: var(--text-muted);
    font-size: 0.75rem;
    margin-left: var(--space-sm);
}

/* ==========================================
   About Section
   ========================================== */
.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--space-3xl);
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.about-text h3 {
    margin-bottom: var(--space-lg);
    color: var(--text-primary);
}

.about-text h4 {
    margin-top: var(--space-2xl);
    margin-bottom: var(--space-md);
    color: var(--accent-cyan);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    line-height: 1.8;
}

.about-text strong {
    color: var(--text-primary);
}

.about-text a {
    color: var(--accent-cyan);
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.about-text a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

.authors-list {
    list-style: none;
}

.authors-list li {
    padding: var(--space-sm) 0;
    color: var(--text-secondary);
}

.authors-list strong {
    color: var(--text-primary);
}

.authors-list a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.authors-list a:hover {
    color: var(--accent-cyan);
}

.paper-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    text-align: center;
    position: sticky;
    top: 100px;
}

.paper-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(168, 85, 247, 0.1));
    border-radius: var(--radius-lg);
    margin: 0 auto var(--space-lg);
    color: var(--accent-cyan);
}

.paper-card h4 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: var(--space-lg);
}

.paper-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.paper-meta {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

.btn {
    display: inline-block;
    padding: var(--space-sm) var(--space-lg);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    margin: var(--space-xs);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--accent-cyan);
    color: var(--bg-primary);
}

.btn-primary:hover {
    background: var(--accent-mint);
    color: var(--bg-primary);
    transform: translateY(-2px);
    box-shadow: var(--glow-cyan);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}

.btn-secondary:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

/* ==========================================
   Methodology Section
   ========================================== */
.methodology-content {
    max-width: 1200px;
    margin: 0 auto;
}

.methodology-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

.method-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-base);
}

.method-card:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-4px);
    box-shadow: var(--glow-cyan);
}

.method-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(168, 85, 247, 0.1));
    border-radius: var(--radius-md);
    color: var(--accent-cyan);
    margin-bottom: var(--space-lg);
}

.method-card h4 {
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    font-size: 1.125rem;
}

.method-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin: 0;
}

.method-card strong {
    color: var(--accent-cyan);
}

.methodology-details {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--space-xl);
}

.detail-section {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
}

.detail-section h4 {
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
    font-size: 1rem;
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--border-subtle);
}

.detail-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.detail-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--border-subtle);
}

.detail-item:last-child {
    border-bottom: none;
}

.detail-label {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.detail-value {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.875rem;
    font-family: var(--font-mono);
}

.detail-section p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-md);
}

.detail-section strong {
    color: var(--accent-cyan);
}

.detail-bullets {
    list-style: none;
    padding: 0;
    margin: var(--space-md) 0;
}

.detail-bullets li {
    position: relative;
    padding-left: var(--space-lg);
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.detail-bullets li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 6px;
    height: 6px;
    background: var(--accent-cyan);
    border-radius: 50%;
}

.detail-note {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-style: italic;
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-subtle);
    margin-top: var(--space-md);
}

@media (max-width: 1024px) {
    .methodology-details {
        grid-template-columns: 1fr;
    }
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    background: var(--bg-primary);
    padding: var(--space-3xl) var(--space-xl) var(--space-xl);
    border-top: 1px solid var(--border-subtle);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--space-2xl);
    padding-bottom: var(--space-2xl);
    border-bottom: 1px solid var(--border-subtle);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-logo {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-mint));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer-links-grid {
    display: flex;
    gap: var(--space-3xl);
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-col h5 {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
}

.footer-col a {
    color: var(--text-secondary);
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.footer-col a:hover {
    color: var(--accent-cyan);
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    padding-top: var(--space-xl);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.8125rem;
}

.footer p {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin: 0;
}

.footer-links {
    margin-top: var(--space-md);
}

.footer-links a {
    color: var(--text-secondary);
}

.footer-links a:hover {
    color: var(--accent-cyan);
}

.footer-links span {
    color: var(--text-muted);
    margin: 0 var(--space-sm);
}

/* ==========================================
   Tooltip
   ========================================== */
.tooltip {
    position: fixed;
    background: var(--bg-elevated);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-fast);
    z-index: 1000;
    max-width: 280px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.tooltip.visible {
    opacity: 1;
}

.tooltip-title {
    font-weight: 600;
    font-size: 0.9375rem;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--border-subtle);
}

.tooltip-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    padding: var(--space-xs) 0;
}

.tooltip-value {
    font-weight: 600;
    color: var(--accent-cyan);
    font-family: var(--font-mono);
}

/* ==========================================
   Loading
   ========================================== */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 300px;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-light);
    border-top-color: var(--accent-cyan);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ==========================================
   Map Controls
   ========================================== */
.map-area {
    position: relative;
}

.map-controls-hint {
    position: absolute;
    bottom: var(--space-md);
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-xs) var(--space-md);
    font-size: 0.75rem;
    color: var(--text-muted);
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(4px);
    border-radius: var(--radius-full);
    border: 1px solid var(--border-subtle);
    white-space: nowrap;
    pointer-events: none;
    z-index: 10;
}

.map-area svg {
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
}

.map-area svg:active {
    cursor: grabbing;
}

/* ==========================================
   Responsive
   ========================================== */
@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
    }

    .paper-card {
        position: static;
    }
}

@media (max-width: 768px) {
    .section {
        padding: var(--space-2xl) var(--space-md);
    }

    .hero {
        padding: var(--space-xl) var(--space-md);
    }

    .hero-stats {
        flex-direction: column;
        width: 100%;
    }

    .stat-card {
        width: 100%;
        max-width: 280px;
    }

    .nav-container {
        flex-wrap: wrap;
        gap: var(--space-xs);
    }

    .nav-logo {
        width: 100%;
        text-align: center;
        margin-bottom: var(--space-sm);
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .controls {
        flex-direction: column;
        align-items: stretch;
    }

    .period-selector {
        flex-wrap: wrap;
        justify-content: center;
    }

    .trends-grid {
        grid-template-columns: 1fr;
    }

    .chart-area {
        min-height: 350px;
    }

    .about-content {
        padding: 0;
    }

    .footer-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .footer-links-grid {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--space-xl);
    }

    .methodology-grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================
   Selection
   ========================================== */
/* ==========================================
   Glass Effect Utility
   ========================================== */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
}

/* ==========================================
   Selection
   ========================================== */
::selection {
    background: var(--accent-cyan);
    color: var(--bg-primary);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-elevated);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}