/* ========================================
   WORLD SIMULATION ENGINE — CSS
   Premium Futuristic Strategy Game UI
======================================== */

:root {
    /* ── Base Dark Theme ── */
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.7);
    --bg-glass: rgba(15, 23, 42, 0.6);
    --border-glass: rgba(100, 150, 255, 0.12);
    --border-glow: rgba(59, 130, 246, 0.3);

    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-accent: #60a5fa;

    --accent-blue: #3b82f6;
    --accent-cyan: #22d3ee;
    --accent-emerald: #10b981;
    --accent-amber: #f59e0b;
    --accent-red: #ef4444;
    --accent-purple: #a855f7;
    --accent-pink: #ec4899;

    /* ── Era Accent (dynamic, overridden by JS) ── */
    --era-accent: #3b82f6;
    --era-accent-rgb: 59, 130, 246;
    --era-glow: rgba(59, 130, 246, 0.15);

    --gradient-primary: linear-gradient(135deg, #1e3a5f, #0a0e1a);
    --gradient-header: linear-gradient(90deg, rgba(59, 130, 246, 0.1), rgba(34, 211, 238, 0.05), rgba(168, 85, 247, 0.1));
    --gradient-card: linear-gradient(145deg, rgba(30, 58, 95, 0.4), rgba(15, 23, 42, 0.6));
    --gradient-accent: linear-gradient(135deg, #3b82f6, #8b5cf6);

    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3), 0 1px 3px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.15);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    --font-display: 'Orbitron', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Light Mode ── */
[data-theme="light"] {
    --bg-primary: #f0f4f8;
    --bg-secondary: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-glass: rgba(240, 244, 248, 0.7);
    --border-glass: rgba(100, 120, 160, 0.15);
    --border-glow: rgba(var(--era-accent-rgb), 0.3);

    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-accent: var(--era-accent);

    --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(241, 245, 249, 0.8));
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 20px rgba(var(--era-accent-rgb), 0.1);
}

[data-theme="light"] body::before {
    background:
        radial-gradient(ellipse at 20% 20%, rgba(var(--era-accent-rgb), 0.04) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(168, 85, 247, 0.02) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(34, 211, 238, 0.02) 0%, transparent 60%);
}

[data-theme="light"] #main-header {
    background: rgba(255, 255, 255, 0.85);
    border-bottom-color: rgba(100, 120, 160, 0.1);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .nav-btn {
    background: rgba(241, 245, 249, 0.8);
    color: var(--era-accent);
}

[data-theme="light"] .year-display {
    background: rgba(241, 245, 249, 0.9);
    border-color: rgba(var(--era-accent-rgb), 0.2);
}

[data-theme="light"] .year-number {
    color: var(--era-accent);
    text-shadow: none;
}

[data-theme="light"] .control-btn {
    background: rgba(241, 245, 249, 0.8);
    color: var(--text-secondary);
    border-color: rgba(100, 120, 160, 0.12);
}

[data-theme="light"] .control-btn:hover {
    background: rgba(var(--era-accent-rgb), 0.08);
    border-color: var(--era-accent);
    color: var(--text-primary);
}

[data-theme="light"] .control-btn.active {
    background: rgba(var(--era-accent-rgb), 0.12);
    border-color: var(--era-accent);
    color: var(--era-accent);
}

[data-theme="light"] .stat-card {
    background: var(--gradient-card);
    border-color: rgba(100, 120, 160, 0.1);
}

[data-theme="light"] .stat-card:hover {
    border-color: rgba(var(--era-accent-rgb), 0.25);
    box-shadow: 0 4px 20px rgba(var(--era-accent-rgb), 0.08);
}

[data-theme="light"] .stat-card::before {
    background: linear-gradient(135deg, rgba(var(--era-accent-rgb), 0.03), transparent);
}

[data-theme="light"] .mini-stat {
    background: rgba(241, 245, 249, 0.6);
    border-color: rgba(100, 120, 160, 0.06);
}

[data-theme="light"] .mini-value {
    color: var(--era-accent);
}

[data-theme="light"] .event-panel {
    background: var(--gradient-card);
    border-color: rgba(100, 120, 160, 0.1);
}

[data-theme="light"] .panel-title {
    background: rgba(241, 245, 249, 0.5);
    border-bottom-color: rgba(100, 120, 160, 0.06);
    color: var(--text-secondary);
}

[data-theme="light"] .event-item {
    border-bottom-color: rgba(100, 120, 160, 0.06);
    color: var(--text-secondary);
}

[data-theme="light"] .big-nav-btn {
    background: linear-gradient(135deg, rgba(var(--era-accent-rgb), 0.08), rgba(var(--era-accent-rgb), 0.04));
    border-color: rgba(var(--era-accent-rgb), 0.25);
    color: var(--era-accent);
}

[data-theme="light"] .big-nav-btn:hover {
    box-shadow: 0 8px 30px rgba(var(--era-accent-rgb), 0.12);
    border-color: var(--era-accent);
}

[data-theme="light"] .progress-bar {
    background: linear-gradient(90deg, var(--era-accent), var(--accent-cyan));
}

[data-theme="light"] .modal-content {
    background: #ffffff;
    border-color: rgba(100, 120, 160, 0.12);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .modal-header {
    background: #ffffff;
    border-bottom-color: rgba(100, 120, 160, 0.1);
}

[data-theme="light"] .modal-header h2 {
    color: var(--era-accent);
}

[data-theme="light"] .modal-overlay {
    background: rgba(0, 0, 0, 0.3);
}

[data-theme="light"] .header-title {
    background: linear-gradient(90deg, var(--era-accent), var(--accent-cyan));
    -webkit-background-clip: text;
    background-clip: text;
}

[data-theme="light"] ::-webkit-scrollbar-track { background: #f1f5f9; }
[data-theme="light"] ::-webkit-scrollbar-thumb { background: var(--era-accent); }

/* ── Era Color Themes ── */
[data-era="transition"] {
    --era-accent: #3b82f6;
    --era-accent-rgb: 59, 130, 246;
    --era-glow: rgba(59, 130, 246, 0.15);
}

[data-era="acceleration"] {
    --era-accent: #a855f7;
    --era-accent-rgb: 168, 85, 247;
    --era-glow: rgba(168, 85, 247, 0.15);
}

[data-era="convergence"] {
    --era-accent: #10b981;
    --era-accent-rgb: 16, 185, 129;
    --era-glow: rgba(16, 185, 129, 0.15);
}

[data-era="new_horizon"] {
    --era-accent: #06b6d4;
    --era-accent-rgb: 6, 182, 212;
    --era-glow: rgba(6, 182, 212, 0.15);
}

/* Apply era accent to key elements */
[data-era] .year-number { color: var(--era-accent); }
[data-era] .mini-value { color: var(--era-accent); }
[data-era] .header-title {
    background: linear-gradient(90deg, var(--era-accent), var(--accent-cyan));
    -webkit-background-clip: text;
    background-clip: text;
}
[data-era] .progress-bar {
    background: linear-gradient(90deg, var(--era-accent), var(--accent-cyan), var(--accent-purple));
}
[data-era] .big-nav-btn {
    border-color: rgba(var(--era-accent-rgb), 0.3);
    color: var(--era-accent);
}
[data-era] .year-display {
    border-color: rgba(var(--era-accent-rgb), 0.3);
    box-shadow: 0 0 20px var(--era-glow);
}
[data-era] .modal-header h2 { color: var(--era-accent); }

/* Smooth theme transitions */
body, #main-header, .stat-card, .event-panel, .mini-stat,
.control-btn, .nav-btn, .year-display, .big-nav-btn,
.modal-content, .modal-header, .progress-bar {
    transition: background 0.5s ease, color 0.5s ease, border-color 0.5s ease, box-shadow 0.5s ease;
}

/* ===== RESET & BASE ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: var(--accent-blue) var(--bg-secondary);
}

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

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(59, 130, 246, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(168, 85, 247, 0.04) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(34, 211, 238, 0.03) 0%, transparent 60%);
    pointer-events: none;
    z-index: 0;
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--accent-blue); border-radius: 3px; }

/* ===== DISCLAIMER SCREEN ===== */
#disclaimer-screen {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    z-index: 20000;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

#disclaimer-screen.fade-out {
    opacity: 0;
    visibility: hidden;
}

.disclaimer-content {
    text-align: center;
    z-index: 10;
    position: relative;
    max-width: 620px;
    padding: 0 24px;
}

.disclaimer-icon {
    font-size: 64px;
    animation: pulse-warn 2s ease-in-out infinite;
    filter: drop-shadow(0 0 25px rgba(245, 158, 11, 0.5));
}

.disclaimer-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: 8px;
    color: var(--accent-amber);
    margin-top: 16px;
    text-shadow: 0 0 30px rgba(245, 158, 11, 0.3);
}

.disclaimer-divider {
    width: 80px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-amber), transparent);
    margin: 20px auto;
    border-radius: 1px;
}

.disclaimer-body {
    margin-bottom: 28px;
}

.disclaimer-main {
    font-family: var(--font-body);
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.disclaimer-main strong {
    color: var(--accent-amber);
    font-weight: 700;
}

.disclaimer-detail {
    font-family: var(--font-body);
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 12px;
}

.disclaimer-detail strong {
    color: var(--text-primary);
    font-weight: 600;
}

.disclaimer-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 24px;
    background: rgba(245, 158, 11, 0.08);
    border: 1px solid rgba(245, 158, 11, 0.25);
    border-radius: 30px;
    margin-bottom: 32px;
    animation: badge-glow 3s ease-in-out infinite;
}

.badge-icon {
    font-size: 1.3rem;
}

.badge-text {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--accent-amber);
}

.disclaimer-btn {
    display: inline-block;
    padding: 16px 48px;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.15), rgba(234, 88, 12, 0.1));
    border: 1px solid rgba(245, 158, 11, 0.35);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.disclaimer-btn .btn-inner {
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--accent-amber);
    position: relative;
    z-index: 1;
}

.disclaimer-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(234, 88, 12, 0.15));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.disclaimer-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 40px rgba(245, 158, 11, 0.2), 0 0 20px rgba(245, 158, 11, 0.1);
    border-color: var(--accent-amber);
}

.disclaimer-btn:hover::before { opacity: 1; }
.disclaimer-btn:active { transform: translateY(-1px); }

.disclaimer-footer {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    margin-top: 28px;
    text-transform: uppercase;
}

.disclaimer-particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.disclaimer-particles .particle {
    background: var(--accent-amber);
    opacity: 0.2;
}

@keyframes pulse-warn {
    0%, 100% { filter: drop-shadow(0 0 15px rgba(245, 158, 11, 0.4)); transform: scale(1); }
    50% { filter: drop-shadow(0 0 35px rgba(245, 158, 11, 0.7)); transform: scale(1.05); }
}

@keyframes badge-glow {
    0%, 100% { box-shadow: 0 0 10px rgba(245, 158, 11, 0.05); }
    50% { box-shadow: 0 0 25px rgba(245, 158, 11, 0.15); }
}

.hidden { display: none !important; }

/* ===== LOADING SCREEN ===== */
#loading-screen {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    z-index: 10000;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

#loading-screen.fade-out {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    text-align: center;
    z-index: 10;
    position: relative;
}

.loading-logo {
    font-size: 80px;
    animation: pulse-glow 2s ease-in-out infinite, float 3s ease-in-out infinite;
    filter: drop-shadow(0 0 30px rgba(59, 130, 246, 0.5));
}

.loading-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: 4px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-top: 20px;
}

.loading-subtitle {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 12px;
    animation: blink-text 1.5s step-end infinite;
}

.loading-bar-container {
    width: 320px;
    height: 4px;
    background: rgba(59, 130, 246, 0.15);
    border-radius: 2px;
    margin: 24px auto 0;
    overflow: hidden;
}

.loading-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
    border-radius: 2px;
    transition: width 0.1s linear;
    box-shadow: 0 0 10px var(--accent-blue);
}

.loading-year {
    font-family: var(--font-display);
    font-size: 1.2rem;
    color: var(--accent-cyan);
    margin-top: 16px;
    letter-spacing: 6px;
}

.particle-field {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--accent-blue);
    border-radius: 50%;
    opacity: 0.4;
    animation: drift linear infinite;
}

/* ===== HEADER ===== */
#main-header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
    background: rgba(10, 14, 26, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 28px;
    filter: drop-shadow(0 0 8px rgba(59, 130, 246, 0.4));
}

.header-title {
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 3px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-center {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-btn {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-glass);
    background: var(--bg-glass);
    color: var(--accent-blue);
    font-size: 1rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-btn:hover {
    background: rgba(59, 130, 246, 0.15);
    border-color: var(--accent-blue);
    box-shadow: 0 0 12px rgba(59, 130, 246, 0.2);
    transform: scale(1.05);
}

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

.year-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 4px 28px;
    background: var(--gradient-card);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-glow);
}

.year-label {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 4px;
    color: var(--text-muted);
    text-transform: uppercase;
}

.year-number {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--accent-cyan);
    text-shadow: 0 0 20px rgba(34, 211, 238, 0.3);
    letter-spacing: 4px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.control-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border: 1px solid var(--border-glass);
    background: var(--bg-glass);
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 1px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-transform: uppercase;
}

.control-btn:hover {
    background: rgba(59, 130, 246, 0.1);
    border-color: var(--accent-blue);
    color: var(--text-primary);
}

.control-btn.active {
    background: rgba(59, 130, 246, 0.2);
    border-color: var(--accent-blue);
    color: var(--accent-cyan);
    box-shadow: 0 0 12px rgba(59, 130, 246, 0.15);
}

/* ===== PROGRESS BAR ===== */
.progress-container {
    position: relative;
    height: 3px;
    background: rgba(59, 130, 246, 0.08);
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan), var(--accent-purple));
    transition: width var(--transition-base);
    box-shadow: 0 0 8px rgba(59, 130, 246, 0.3);
}

/* ===== MAIN CONTENT ===== */
#main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px;
    position: relative;
    z-index: 1;
}

/* ===== STATS GRID ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 20px;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 20px;
    background: var(--gradient-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

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

.stat-card.wide {
    grid-column: span 3;
}

.stat-icon {
    font-size: 2rem;
    flex-shrink: 0;
    filter: drop-shadow(0 0 6px rgba(59, 130, 246, 0.3));
}

.stat-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 1;
}

.stat-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    text-transform: uppercase;
}

.stat-value {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 1px;
}

.stat-change {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
}

.stat-change.positive { color: var(--accent-emerald); }
.stat-change.negative { color: var(--accent-red); }
.stat-change.neutral { color: var(--text-muted); }

.stability-bar-container {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 3px;
    margin-top: 4px;
    overflow: hidden;
}

.stability-bar {
    height: 100%;
    border-radius: 3px;
    transition: width 0.8s ease, background 0.5s ease;
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.3);
}

/* ===== SECONDARY STATS ===== */
.secondary-stats {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 12px;
    margin-bottom: 24px;
}

.mini-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 12px 8px;
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid rgba(100, 150, 255, 0.06);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.mini-stat:hover {
    border-color: var(--border-glass);
    background: rgba(15, 23, 42, 0.6);
}

.mini-label {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 1px;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 4px;
}

.mini-value {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent-cyan);
}

/* ===== EVENTS GRID ===== */
.events-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 32px;
}

.event-panel {
    background: var(--gradient-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.event-panel:hover {
    border-color: var(--border-glow);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

.panel-title {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 20px;
    font-family: var(--font-display);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(100, 150, 255, 0.06);
    background: rgba(0, 0, 0, 0.15);
}

.panel-icon { font-size: 1.1rem; }

.panel-content {
    padding: 16px 20px;
    min-height: 100px;
}

.event-item {
    padding: 8px 0;
    border-bottom: 1px solid rgba(100, 150, 255, 0.04);
    font-size: 0.88rem;
    line-height: 1.5;
    color: var(--text-secondary);
    animation: fadeSlideIn 0.4s ease both;
}

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

.event-item .event-tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 1px;
    margin-right: 6px;
    text-transform: uppercase;
}

.tag-tech { background: rgba(59, 130, 246, 0.15); color: var(--accent-blue); }
.tag-crisis { background: rgba(239, 68, 68, 0.15); color: var(--accent-red); }
.tag-economy { background: rgba(245, 158, 11, 0.15); color: var(--accent-amber); }
.tag-space { background: rgba(168, 85, 247, 0.15); color: var(--accent-purple); }
.tag-climate { background: rgba(16, 185, 129, 0.15); color: var(--accent-emerald); }
.tag-politics { background: rgba(236, 72, 153, 0.15); color: var(--accent-pink); }
.tag-health { background: rgba(34, 211, 238, 0.15); color: var(--accent-cyan); }
.tag-random { background: rgba(148, 163, 184, 0.15); color: var(--text-secondary); }

/* ===== NAV FOOTER ===== */
.nav-footer {
    display: flex;
    justify-content: center;
    padding: 20px 0 40px;
}

.big-nav-btn {
    padding: 18px 64px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(168, 85, 247, 0.15));
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-lg);
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--accent-cyan);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.big-nav-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(34, 211, 238, 0.1));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.big-nav-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 40px rgba(59, 130, 246, 0.2), 0 0 20px rgba(34, 211, 238, 0.1);
    border-color: var(--accent-cyan);
}

.big-nav-btn:hover::before { opacity: 1; }
.big-nav-btn:active { transform: translateY(-1px); }

/* ===== MODAL ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    max-width: 1000px;
    width: 92%;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 0 20px 80px rgba(0, 0, 0, 0.5), 0 0 40px rgba(59, 130, 246, 0.1);
    animation: slideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.summary-modal-content {
    max-width: 900px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 28px;
    border-bottom: 1px solid var(--border-glass);
    position: sticky;
    top: 0;
    background: var(--bg-secondary);
    z-index: 10;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.modal-header h2 {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--accent-cyan);
}

.modal-close {
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-glass);
    background: transparent;
    color: var(--text-secondary);
    font-size: 1.1rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: rgba(239, 68, 68, 0.15);
    border-color: var(--accent-red);
    color: var(--accent-red);
}

.modal-body {
    padding: 24px 28px 28px;
}

/* Timeline Controls */
.timeline-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 20px;
    justify-content: center;
}

.tl-btn {
    padding: 6px 16px;
    border: 1px solid var(--border-glass);
    background: transparent;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 500;
    border-radius: 20px;
    cursor: pointer;
    transition: all var(--transition-fast);
    letter-spacing: 0.5px;
}

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

.tl-btn.active {
    background: rgba(59, 130, 246, 0.2);
    border-color: var(--accent-blue);
    color: var(--accent-cyan);
}

/* Summary Sections */
.summary-section {
    margin-bottom: 28px;
}

.summary-section h3 {
    font-family: var(--font-display);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--accent-cyan);
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(100, 150, 255, 0.08);
}

.summary-item {
    padding: 10px 0;
    border-bottom: 1px solid rgba(100, 150, 255, 0.04);
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

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

.summary-item strong {
    color: var(--text-primary);
    font-weight: 600;
}

.summary-highlight {
    display: inline-block;
    padding: 2px 10px;
    background: rgba(34, 211, 238, 0.1);
    border: 1px solid rgba(34, 211, 238, 0.2);
    border-radius: 6px;
    color: var(--accent-cyan);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    font-weight: 500;
}

.timeline-entry {
    display: flex;
    gap: 16px;
    padding: 8px 0;
    border-bottom: 1px solid rgba(100, 150, 255, 0.04);
    font-size: 0.85rem;
}

.timeline-entry .tl-year {
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--accent-blue);
    flex-shrink: 0;
    width: 50px;
}

.timeline-entry .tl-desc {
    color: var(--text-secondary);
}

/* ===== ANIMATIONS ===== */
@keyframes pulse-glow {
    0%, 100% { filter: drop-shadow(0 0 20px rgba(59, 130, 246, 0.4)); }
    50% { filter: drop-shadow(0 0 40px rgba(59, 130, 246, 0.7)); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

@keyframes blink-text {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

@keyframes drift {
    from { transform: translateY(100vh) translateX(0); opacity: 0; }
    10% { opacity: 0.4; }
    90% { opacity: 0.4; }
    to { transform: translateY(-100vh) translateX(40px); opacity: 0; }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(40px) scale(0.96); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes fadeSlideIn {
    from { opacity: 0; transform: translateX(-12px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes yearPulse {
    0% { text-shadow: 0 0 20px rgba(34, 211, 238, 0.3); }
    50% { text-shadow: 0 0 40px rgba(34, 211, 238, 0.6); }
    100% { text-shadow: 0 0 20px rgba(34, 211, 238, 0.3); }
}

.year-transition {
    animation: yearPulse 0.6s ease;
}

/* ===== ERA INDICATORS ===== */
.era-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 20px;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 1px;
    margin-left: 12px;
}

.era-transition { background: rgba(59, 130, 246, 0.15); color: var(--accent-blue); border: 1px solid rgba(59, 130, 246, 0.3); }
.era-acceleration { background: rgba(168, 85, 247, 0.15); color: var(--accent-purple); border: 1px solid rgba(168, 85, 247, 0.3); }
.era-convergence { background: rgba(16, 185, 129, 0.15); color: var(--accent-emerald); border: 1px solid rgba(16, 185, 129, 0.3); }
.era-new { background: rgba(34, 211, 238, 0.15); color: var(--accent-cyan); border: 1px solid rgba(34, 211, 238, 0.3); }

/* ===== STABILITY BAR COLORS ===== */
.stability-high { background: linear-gradient(90deg, #10b981, #34d399); }
.stability-medium { background: linear-gradient(90deg, #f59e0b, #fbbf24); }
.stability-low { background: linear-gradient(90deg, #ef4444, #f87171); }

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

/* Tablet */
@media (max-width: 1200px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .stat-card.wide { grid-column: span 2; }
    .secondary-stats { grid-template-columns: repeat(3, 1fr); }
}

/* Small Tablet / Large Phone */
@media (max-width: 900px) {
    #main-header {
        flex-direction: column;
        gap: 10px;
        padding: 10px 12px;
    }
    .header-left { display: none; }
    .header-right {
        flex-wrap: wrap;
        justify-content: center;
        gap: 6px;
    }
    .header-center { gap: 10px; }
    .events-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr; }
    .stat-card.wide { grid-column: span 1; }
    .secondary-stats { grid-template-columns: repeat(3, 1fr); }
    .year-number { font-size: 1.4rem; }
    #main-content { padding: 12px; }
    .big-nav-btn {
        padding: 14px 32px;
        font-size: 0.9rem;
        letter-spacing: 2px;
    }
    .modal-content {
        width: 96%;
        max-height: 90vh;
        border-radius: var(--radius-md);
    }
    .modal-header {
        padding: 14px 16px;
        border-radius: var(--radius-md) var(--radius-md) 0 0;
    }
    .modal-header h2 {
        font-size: 0.72rem;
        letter-spacing: 1px;
    }
    .modal-body { padding: 16px; }
}

/* Phone */
@media (max-width: 600px) {
    /* Disclaimer */
    .disclaimer-icon { font-size: 48px; }
    .disclaimer-title {
        font-size: 1.3rem;
        letter-spacing: 4px;
    }
    .disclaimer-main { font-size: 0.92rem; }
    .disclaimer-detail { font-size: 0.8rem; }
    .disclaimer-badge {
        padding: 8px 16px;
        gap: 8px;
    }
    .badge-text {
        font-size: 0.6rem;
        letter-spacing: 1px;
    }
    .disclaimer-btn {
        padding: 14px 28px;
    }
    .disclaimer-btn .btn-inner {
        font-size: 0.7rem;
        letter-spacing: 1px;
    }
    .disclaimer-footer { font-size: 0.5rem; }

    /* Loading */
    .loading-logo { font-size: 56px; }
    .loading-title {
        font-size: 1.2rem;
        letter-spacing: 2px;
    }
    .loading-subtitle { font-size: 0.75rem; }
    .loading-bar-container { width: 260px; }
    .loading-year { font-size: 1rem; letter-spacing: 4px; }

    /* Header */
    #main-header {
        padding: 8px 10px;
        gap: 8px;
    }
    .header-center { gap: 8px; }
    .nav-btn {
        width: 36px;
        height: 36px;
        font-size: 0.85rem;
    }
    .year-display { padding: 3px 16px; }
    .year-label {
        font-size: 0.5rem;
        letter-spacing: 2px;
    }
    .year-number {
        font-size: 1.2rem;
        letter-spacing: 2px;
    }
    .control-btn {
        padding: 6px 10px;
        font-size: 0.62rem;
        gap: 4px;
        letter-spacing: 0.5px;
    }
    .header-right { gap: 4px; }

    /* Progress */
    .progress-container { height: 2px; }

    /* Stats */
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 10px;
        margin-bottom: 14px;
    }
    .stat-card {
        padding: 14px 16px;
        gap: 12px;
    }
    .stat-icon { font-size: 1.6rem; }
    .stat-value {
        font-size: 1.05rem;
        letter-spacing: 0.5px;
    }
    .stat-label {
        font-size: 0.6rem;
        letter-spacing: 1px;
    }
    .stat-change { font-size: 0.68rem; }

    /* Secondary stats */
    .secondary-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
        margin-bottom: 16px;
    }
    .mini-stat { padding: 10px 6px; }
    .mini-label { font-size: 0.5rem; letter-spacing: 0.5px; }
    .mini-value { font-size: 0.85rem; }

    /* Events */
    .events-grid {
        grid-template-columns: 1fr;
        gap: 12px;
        margin-bottom: 20px;
    }
    .panel-title {
        padding: 10px 14px;
        font-size: 0.62rem;
        letter-spacing: 1.5px;
        gap: 8px;
    }
    .panel-icon { font-size: 0.95rem; }
    .panel-content {
        padding: 12px 14px;
        min-height: 70px;
    }
    .event-item {
        font-size: 0.8rem;
        padding: 6px 0;
        line-height: 1.5;
    }
    .event-item .event-tag {
        font-size: 0.55rem;
        padding: 2px 6px;
        margin-right: 4px;
    }

    /* Nav Footer */
    .nav-footer { padding: 16px 0 32px; }
    .big-nav-btn {
        padding: 14px 24px;
        font-size: 0.8rem;
        letter-spacing: 1.5px;
        border-radius: var(--radius-md);
        width: 100%;
        text-align: center;
    }

    /* Modals */
    .modal-content {
        width: 98%;
        max-height: 92vh;
        border-radius: var(--radius-sm);
    }
    .modal-header {
        padding: 12px 14px;
        border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    }
    .modal-header h2 {
        font-size: 0.62rem;
        letter-spacing: 1px;
    }
    .modal-close {
        width: 32px;
        height: 32px;
        font-size: 0.9rem;
    }
    .modal-body { padding: 12px 14px 16px; }

    /* Timeline */
    .timeline-controls {
        gap: 4px;
        margin-top: 14px;
    }
    .tl-btn {
        padding: 5px 10px;
        font-size: 0.6rem;
    }

    /* Summary */
    .summary-section h3 {
        font-size: 0.68rem;
        letter-spacing: 1.5px;
    }
    .summary-item {
        font-size: 0.82rem;
        padding: 8px 0;
    }
    .summary-highlight {
        font-size: 0.72rem;
        padding: 2px 8px;
    }
    .timeline-entry {
        gap: 10px;
        font-size: 0.78rem;
    }
    .timeline-entry .tl-year {
        font-size: 0.72rem;
        width: 40px;
    }

    /* Stability bar */
    .stability-bar-container { height: 5px; }
}

/* Very Small Phone (360px) */
@media (max-width: 400px) {
    .disclaimer-title {
        font-size: 1.1rem;
        letter-spacing: 3px;
    }
    .disclaimer-main { font-size: 0.85rem; }
    .disclaimer-detail { font-size: 0.75rem; }
    .disclaimer-btn .btn-inner { font-size: 0.62rem; }

    .year-number { font-size: 1.1rem; }
    .control-btn {
        padding: 5px 7px;
        font-size: 0.55rem;
    }
    .secondary-stats { grid-template-columns: repeat(2, 1fr); }
    .stat-value { font-size: 0.95rem; }
    .mini-label { font-size: 0.45rem; }
    .mini-value { font-size: 0.75rem; }
    .event-item { font-size: 0.75rem; }
    .big-nav-btn { font-size: 0.72rem; padding: 12px 16px; }
}