/* === DYNAMIC BRAIN HUB — HIGH-VELOCITY FUNNEL === */
:root {
    --color-primary: #1e3a8a;
    --color-primary-dark: #1e40af;
    --color-primary-light: #3b82f6;
    --color-primary-glow: rgba(30, 58, 138, 0.3);
    --color-accent: #f59e0b;
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-bg-dark: #0f172a;
    --color-bg-dark-alt: #1e293b;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-text-light: #94a3b8;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Space Grotesk', 'Inter', sans-serif;
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
    --shadow-glow: 0 0 40px rgba(30, 58, 138, 0.15);
    --radius-sm: 8px; --radius-md: 12px; --radius-lg: 16px; --radius-xl: 24px; --radius-full: 9999px;
    --transition-fast: 150ms ease; --transition-base: 250ms ease;
}
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { font-family: var(--font-primary); font-size: 16px; line-height: 1.6; color: var(--color-text); background: var(--color-bg); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: color var(--transition-fast); }
ul { list-style: none; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
@media (min-width: 768px) { .container { padding: 0 32px; } }

/* --- Buttons --- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; font-family: var(--font-primary); font-weight: 600; border: none; cursor: pointer; transition: all var(--transition-base); text-align: center; }
.btn-primary { background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark)); color: #fff; border-radius: var(--radius-full); box-shadow: 0 4px 14px var(--color-primary-glow); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px var(--color-primary-glow); }
.btn-lg { padding: 14px 32px; font-size: 1rem; }
.btn-xl { padding: 18px 36px; font-size: 1.05rem; }
@media (max-width: 480px) { .btn-xl { padding: 16px 24px; font-size: 0.95rem; } }
.pulse-glow { animation: pulseGlow 2.5s ease-in-out infinite; }
@keyframes pulseGlow { 0%, 100% { box-shadow: 0 4px 14px var(--color-primary-glow); } 50% { box-shadow: 0 4px 30px rgba(99,102,241,0.45); } }

/* --- Sections --- */
.section-header { text-align: center; max-width: 700px; margin: 0 auto 60px; }
.section-tag { display: inline-block; font-size: 0.8rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-primary); background: rgba(99,102,241,0.08); padding: 6px 16px; border-radius: var(--radius-full); margin-bottom: 16px; }
.section-title { font-family: var(--font-display); font-size: clamp(1.75rem, 4vw, 2.5rem); font-weight: 700; line-height: 1.2; color: var(--color-text); margin-bottom: 16px; letter-spacing: -0.02em; }
.section-title em { font-style: italic; color: var(--color-danger); }
.section-subtitle { font-size: 1.1rem; color: var(--color-text-muted); line-height: 1.7; }

/* --- NAVBAR --- */
.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(255,255,255,0.85); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-bottom: 1px solid var(--color-border-light); transition: all var(--transition-base); }
.navbar.scrolled { background: rgba(255,255,255,0.95); box-shadow: var(--shadow-md); }
.nav-container { max-width: 1200px; margin: 0 auto; padding: 0 20px; display: flex; align-items: center; justify-content: space-between; height: 72px; }
.nav-logo { display: flex; align-items: center; }
.nav-logo-img { height: 42px; width: auto; }
.nav-links { display: none; gap: 32px; }
@media (min-width: 992px) { .nav-links { display: flex; align-items: center; } }
.nav-links a { font-size: 0.9rem; font-weight: 500; color: var(--color-text-muted); position: relative; }
.nav-links a:hover { color: var(--color-primary); }
.nav-links a::after { content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px; background: var(--color-primary); border-radius: 1px; transition: width var(--transition-base); }
.nav-links a:hover::after { width: 100%; }
.nav-cta-btn { display: none; padding: 10px 24px; font-size: 0.85rem; font-weight: 600; color: #fff; background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark)); border-radius: var(--radius-full); box-shadow: 0 2px 8px var(--color-primary-glow); transition: all var(--transition-base); }
@media (min-width: 992px) { .nav-cta-btn { display: inline-flex; } }
.nav-cta-btn:hover { transform: translateY(-1px); box-shadow: 0 4px 16px var(--color-primary-glow); }
.mobile-menu-btn { display: flex; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; z-index: 1001; }
@media (min-width: 992px) { .mobile-menu-btn { display: none; } }
.mobile-menu-btn span { display: block; width: 24px; height: 2px; background: var(--color-text); border-radius: 2px; transition: all var(--transition-base); }
.mobile-menu-btn.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
.nav-links.mobile-open { display: flex; flex-direction: column; position: fixed; top: 72px; left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(16px); padding: 24px 20px 32px; gap: 0; border-bottom: 1px solid var(--color-border); box-shadow: var(--shadow-lg); }
.nav-links.mobile-open a { display: block; padding: 16px 0; font-size: 1rem; color: var(--color-text); }
.nav-links.mobile-open a::after { display: none; }

/* --- HERO SECTION --- */
.hero-section { position: relative; min-height: 100vh; display: flex; flex-direction: column; justify-content: center; padding: 100px 0 60px; overflow: hidden; background: linear-gradient(135deg, #f8fafc 0%, #eef2ff 50%, #f0f9ff 100%); }
.hero-bg-elements { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.hero-gradient-orb { position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.4; }
.hero-orb-1 { width: 500px; height: 500px; background: radial-gradient(circle, rgba(99,102,241,0.3), transparent 70%); top: -100px; right: -100px; }
.hero-orb-2 { width: 400px; height: 400px; background: radial-gradient(circle, rgba(6,182,212,0.2), transparent 70%); bottom: -50px; left: -100px; }
.hero-container { display: grid; gap: 48px; align-items: center; position: relative; z-index: 1; }
@media (min-width: 992px) { .hero-container { grid-template-columns: 1fr 1fr; gap: 64px; } }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; font-size: 0.82rem; font-weight: 600; color: var(--color-primary-dark); background: rgba(99,102,241,0.08); border: 1px solid rgba(99,102,241,0.15); padding: 8px 18px; border-radius: var(--radius-full); margin-bottom: 20px; }
.badge-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--color-danger); animation: blink 1.5s ease-in-out infinite; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }
.hero-headline { font-family: var(--font-display); font-size: clamp(2rem, 5.5vw, 3.5rem); font-weight: 800; line-height: 1.1; color: var(--color-text); margin-bottom: 20px; letter-spacing: -0.03em; }
.headline-accent { background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-subheadline { font-size: clamp(1rem, 2vw, 1.15rem); color: var(--color-text-muted); line-height: 1.7; margin-bottom: 32px; max-width: 540px; }
.hero-subheadline strong { color: var(--color-text); font-weight: 600; }
.hero-cta-group { display: flex; flex-direction: column; gap: 12px; }
.hero-trust-line { display: flex; align-items: center; gap: 6px; font-size: 0.85rem; color: var(--color-text-muted); padding-left: 4px; }
.hero-media { display: flex; flex-direction: column; gap: 16px; }
.video-wrapper { position: relative; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-xl), var(--shadow-glow); border: 1px solid rgba(99,102,241,0.1); }
.video-placeholder { background: linear-gradient(135deg, var(--color-bg-dark), var(--color-bg-dark-alt)); padding: 32px 24px; min-height: 360px; display: flex; flex-direction: column; justify-content: center; }
.video-placeholder-content { text-align: center; margin-bottom: 24px; }
.play-button-ring { width: 72px; height: 72px; border-radius: 50%; background: rgba(99,102,241,0.3); display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; cursor: pointer; transition: all var(--transition-base); border: 2px solid rgba(255,255,255,0.2); }
.play-button-ring:hover { background: rgba(99,102,241,0.5); transform: scale(1.05); }
.play-icon { margin-left: 4px; }
.video-label { color: rgba(255,255,255,0.7); font-size: 0.85rem; max-width: 300px; margin: 0 auto; }
.video-demo-preview { display: flex; flex-direction: column; gap: 10px; max-width: 420px; margin: 0 auto; }
.demo-chat-bubble { padding: 10px 14px; border-radius: 12px; font-size: 0.82rem; line-height: 1.5; animation: fadeInUp 0.6s ease both; }
.demo-chat-bubble:nth-child(1) { animation-delay: 0.2s; }
.demo-chat-bubble:nth-child(2) { animation-delay: 0.6s; }
.demo-chat-bubble:nth-child(3) { animation-delay: 1.0s; }
.demo-chat-bubble:nth-child(4) { animation-delay: 1.4s; }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.demo-student { background: rgba(99,102,241,0.15); color: rgba(255,255,255,0.9); align-self: flex-end; max-width: 85%; margin-left: auto; }
.demo-ai { background: rgba(255,255,255,0.08); color: rgba(255,255,255,0.9); align-self: flex-start; max-width: 90%; }
.demo-sender { font-weight: 600; font-size: 0.75rem; opacity: 0.7; display: block; margin-bottom: 2px; }
.hero-media-badges { display: flex; gap: 12px; flex-wrap: wrap; }
.media-badge { display: flex; align-items: center; gap: 6px; font-size: 0.78rem; font-weight: 500; color: var(--color-text-muted); background: var(--color-bg); border: 1px solid var(--color-border); padding: 8px 14px; border-radius: var(--radius-full); }
.hero-scroll-indicator { display: flex; flex-direction: column; align-items: center; gap: 4px; position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%); color: var(--color-text-light); font-size: 0.8rem; animation: bounceDown 2s ease-in-out infinite; }
@keyframes bounceDown { 0%, 100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(8px); } }
@media (max-width: 768px) { .hero-scroll-indicator { display: none; } }

/* --- FEATURES SECTION --- */
.features-section { padding: 100px 0; background: var(--color-bg); }
.feature-card { display: grid; gap: 40px; align-items: center; margin-bottom: 80px; }
.feature-card:last-child { margin-bottom: 0; }
@media (min-width: 992px) { .feature-card { grid-template-columns: 1fr 1fr; gap: 64px; } .feature-card-reverse .feature-visual { order: -1; } }
.feature-number { font-family: var(--font-display); font-size: 0.85rem; font-weight: 700; color: var(--color-primary); opacity: 0.6; margin-bottom: 12px; }
.feature-title { font-family: var(--font-display); font-size: clamp(1.4rem, 3vw, 1.85rem); font-weight: 700; line-height: 1.25; color: var(--color-text); margin-bottom: 16px; letter-spacing: -0.02em; }
.feature-description { font-size: 1rem; color: var(--color-text-muted); line-height: 1.7; margin-bottom: 24px; }
.feature-description strong { color: var(--color-text); }
.feature-benefits { display: flex; flex-direction: column; gap: 12px; }
.feature-benefits li { display: flex; align-items: flex-start; gap: 10px; font-size: 0.92rem; color: var(--color-text); line-height: 1.5; }
.feature-benefits li svg { flex-shrink: 0; margin-top: 2px; }
.feature-demo-window { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-xl); border: 1px solid var(--color-border); background: var(--color-bg); }
.demo-window-header { display: flex; align-items: center; gap: 12px; padding: 12px 16px; background: var(--color-bg-alt); border-bottom: 1px solid var(--color-border); }
.demo-dots { display: flex; gap: 6px; }
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot.red { background: #ef4444; } .dot.yellow { background: #f59e0b; } .dot.green { background: #22c55e; }
.demo-window-title { font-size: 0.78rem; font-weight: 500; color: var(--color-text-muted); }
.demo-window-body { padding: 20px; }
.demo-msg { display: flex; gap: 10px; margin-bottom: 14px; }
.demo-msg:last-child { margin-bottom: 0; }
.demo-msg-avatar { width: 32px; height: 32px; border-radius: 50%; background: var(--color-bg-alt); display: flex; align-items: center; justify-content: center; font-size: 0.85rem; flex-shrink: 0; }
.demo-msg-content { flex: 1; font-size: 0.85rem; line-height: 1.55; color: var(--color-text); }
.demo-msg-content p { margin-bottom: 6px; }
.demo-msg-content p:last-child { margin-bottom: 0; }
.demo-msg-student .demo-msg-content { background: rgba(99,102,241,0.06); padding: 10px 14px; border-radius: 12px 12px 12px 4px; }
.demo-msg-ai .demo-msg-content { background: var(--color-bg-alt); padding: 10px 14px; border-radius: 12px 12px 4px 12px; }
.demo-hint-box { display: flex; align-items: center; gap: 6px; font-size: 0.8rem; color: var(--color-warning); background: rgba(245,158,11,0.08); padding: 8px 12px; border-radius: 8px; margin-top: 8px; }

/* Voice Demo */
.voice-demo { background: var(--color-bg-dark); border-radius: 0 0 var(--radius-lg) var(--radius-lg); }
.voice-status-bar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.voice-indicator { display: flex; align-items: center; gap: 8px; font-size: 0.8rem; color: var(--color-success); font-weight: 500; }
.voice-pulse { width: 8px; height: 8px; border-radius: 50%; background: var(--color-success); animation: blink 1s ease-in-out infinite; }
.voice-timer { font-family: 'Courier New', monospace; font-size: 0.9rem; color: var(--color-success); font-weight: 600; }
.voice-waveform { display: flex; align-items: center; justify-content: center; gap: 4px; height: 60px; margin-bottom: 16px; }
.wave-bar { width: 6px; height: var(--h, 50%); background: linear-gradient(to top, var(--color-primary), var(--color-accent)); border-radius: 3px; animation: waveAnim 1.2s ease-in-out infinite alternate; }
.wave-bar:nth-child(odd) { animation-delay: 0.1s; }
.wave-bar:nth-child(even) { animation-delay: 0.3s; }
.wave-bar:nth-child(3n) { animation-delay: 0.5s; }
@keyframes waveAnim { from { transform: scaleY(0.4); } to { transform: scaleY(1); } }
.voice-transcript { margin-bottom: 16px; }
.vt-ai { font-size: 0.82rem; color: rgba(255,255,255,0.7); font-style: italic; line-height: 1.6; }
.voice-diagram-preview { background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); border-radius: 10px; padding: 16px; }
.diagram-label { font-size: 0.75rem; color: rgba(255,255,255,0.5); margin-bottom: 10px; }
.diagram-math { display: flex; align-items: center; justify-content: center; gap: 16px; font-family: 'Courier New', monospace; flex-wrap: wrap; }
.math-line { font-size: 1.1rem; color: rgba(255,255,255,0.8); background: rgba(255,255,255,0.05); padding: 8px 16px; border-radius: 8px; }
.math-arrow { color: var(--color-primary-light); font-size: 1.2rem; }
.math-result { color: var(--color-success); border: 1px solid rgba(34,197,94,0.3); }

/* Notes Demo */
.notes-demo { padding: 0; }
.notes-header-bar { display: flex; align-items: center; gap: 8px; padding: 12px 16px; background: rgba(139,92,246,0.06); border-bottom: 1px solid rgba(139,92,246,0.1); font-size: 0.82rem; font-weight: 600; color: var(--color-text); }
.notes-icon { font-size: 1rem; }
.notes-auto-badge { margin-left: auto; font-size: 0.7rem; font-weight: 600; color: var(--color-primary); background: rgba(99,102,241,0.1); padding: 3px 10px; border-radius: var(--radius-full); }
.notes-section { padding: 14px 16px; border-bottom: 1px solid var(--color-border-light); }
.notes-section:last-child { border-bottom: none; }
.notes-section h4 { font-size: 0.82rem; font-weight: 600; margin-bottom: 8px; color: var(--color-text); }
.notes-section ul { padding-left: 16px; }
.notes-section li { font-size: 0.8rem; color: var(--color-text-muted); line-height: 1.6; list-style: disc; margin-bottom: 4px; }
.notes-warning { background: rgba(245,158,11,0.04); }

/* --- PRICING SECTION --- */
.pricing-section { padding: 100px 0; background: var(--color-bg-alt); }
.section-subtitle-emphasis { font-size: 1.15rem; color: var(--color-text); line-height: 1.7; max-width: 800px; margin: 0 auto; }
.section-subtitle-emphasis em { font-style: italic; color: var(--color-danger); font-weight: 600; }
.section-subtitle-emphasis strong { color: var(--color-primary); font-weight: 700; }

/* Urgency Alert */
.urgency-alert { display: flex; gap: 20px; align-items: flex-start; background: linear-gradient(135deg, rgba(239,68,68,0.08), rgba(245,158,11,0.08)); border: 2px solid rgba(239,68,68,0.2); border-radius: var(--radius-xl); padding: 24px 28px; margin: 48px auto 48px; max-width: 900px; box-shadow: var(--shadow-md); }
@media (max-width: 640px) { .urgency-alert { flex-direction: column; align-items: center; text-align: center; } }
.urgency-icon { font-size: 2.5rem; flex-shrink: 0; animation: pulse 2s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.1); } }
.urgency-content h3 { font-family: var(--font-display); font-size: 1.15rem; font-weight: 700; color: var(--color-text); margin-bottom: 8px; line-height: 1.3; }
.urgency-content p { font-size: 0.95rem; color: var(--color-text-muted); line-height: 1.6; }
.urgency-content strong { color: var(--color-text); font-weight: 700; }

/* Comparison Table */
.comparison-table-wrapper { max-width: 1000px; margin: 0 auto 48px; overflow-x: auto; background: var(--color-bg); border-radius: var(--radius-xl); box-shadow: var(--shadow-xl); border: 1px solid var(--color-border); }
.comparison-table { width: 100%; border-collapse: collapse; }
.comparison-table thead { background: linear-gradient(135deg, var(--color-bg-dark), var(--color-bg-dark-alt)); }
.comparison-table th { padding: 24px 20px; text-align: left; border-bottom: 2px solid rgba(255,255,255,0.1); }
.comparison-table th.feature-col { color: rgba(255,255,255,0.7); font-size: 0.85rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; width: 20%; }
.comparison-table th.old-col { background: rgba(239,68,68,0.15); border-left: 1px solid rgba(255,255,255,0.05); width: 40%; }
.comparison-table th.new-col { background: rgba(99,102,241,0.15); border-left: 1px solid rgba(255,255,255,0.05); width: 40%; }
.table-header-content { display: flex; flex-direction: column; gap: 4px; }
.table-icon { font-size: 1.5rem; }
.table-title { font-family: var(--font-display); font-size: 1rem; font-weight: 700; color: #fff; }
.table-subtitle { font-size: 0.8rem; color: rgba(255,255,255,0.6); font-weight: 400; }
.comparison-table tbody tr { border-bottom: 1px solid var(--color-border-light); transition: background var(--transition-fast); }
.comparison-table tbody tr:hover { background: rgba(99,102,241,0.02); }
.comparison-table tbody tr:last-child { border-bottom: none; }
.comparison-table td { padding: 20px; font-size: 0.9rem; line-height: 1.6; vertical-align: top; }
.feature-label { font-weight: 600; color: var(--color-text); background: var(--color-bg-alt); }
.old-value { color: var(--color-text-muted); background: rgba(239,68,68,0.02); border-left: 3px solid rgba(239,68,68,0.3); }
.new-value { color: var(--color-text); background: rgba(99,102,241,0.02); border-left: 3px solid rgba(99,102,241,0.4); }
.old-value strong, .new-value strong { display: block; margin-bottom: 4px; }
.price-highlight-old { font-family: var(--font-display); font-size: 1.5rem; color: var(--color-danger); text-decoration: line-through; }
.price-highlight-new { font-family: var(--font-display); font-size: 1.5rem; color: var(--color-success); }
.price-note { display: block; font-size: 0.75rem; color: var(--color-text-light); margin-top: 4px; font-style: italic; }

/* Mobile Table Adjustments */
@media (max-width: 768px) {
    .comparison-table th, .comparison-table td { padding: 14px 12px; font-size: 0.85rem; }
    .table-title { font-size: 0.9rem; }
    .table-icon { font-size: 1.2rem; }
    .price-highlight-old, .price-highlight-new { font-size: 1.2rem; }
}

/* Pricing CTA Section */
.pricing-cta-section { text-align: center; margin: 48px 0; }

/* Enhanced Guarantee */
.guarantee-card-enhanced { background: linear-gradient(135deg, rgba(34,197,94,0.03), rgba(34,197,94,0.06)); border: 2px solid rgba(34,197,94,0.25); box-shadow: var(--shadow-lg), 0 0 30px rgba(34,197,94,0.1); }
.guarantee-card-enhanced .guarantee-icon { flex-shrink: 0; }
.guarantee-emphasis { display: flex; align-items: center; gap: 8px; font-size: 0.95rem; color: var(--color-text); margin-top: 16px; padding-top: 16px; border-top: 1px solid rgba(34,197,94,0.15); }
.guarantee-emphasis svg { flex-shrink: 0; }
.guarantee-emphasis strong { color: var(--color-success); }

/* Guarantee */
.guarantee-section { max-width: 800px; margin: 0 auto; }
.guarantee-card { display: flex; gap: 24px; align-items: flex-start; background: var(--color-bg); border: 1px solid rgba(34,197,94,0.2); border-radius: var(--radius-xl); padding: 32px; box-shadow: var(--shadow-md); }
@media (max-width: 640px) { .guarantee-card { flex-direction: column; align-items: center; text-align: center; } }
.guarantee-icon { flex-shrink: 0; }
.guarantee-text h3 { font-family: var(--font-display); font-size: 1.15rem; font-weight: 700; color: var(--color-text); margin-bottom: 10px; }
.guarantee-text p { font-size: 0.92rem; color: var(--color-text-muted); line-height: 1.7; }
.guarantee-text a { color: var(--color-primary); font-weight: 600; }
.guarantee-text a:hover { text-decoration: underline; }
.guarantee-text strong { color: var(--color-text); }

/* --- CLOSED BETA SECTION --- */
.closed-beta-section { padding: 0; background: transparent; }
.closed-beta-banner { background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f1419 100%); border: 1px solid rgba(99,102,241,0.2); border-radius: var(--radius-xl); padding: 40px 36px; margin: 0 auto; max-width: 1000px; box-shadow: var(--shadow-xl), 0 0 40px rgba(99,102,241,0.08); position: relative; overflow: hidden; }
.closed-beta-banner::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, transparent, var(--color-primary), var(--color-accent), transparent); opacity: 0.6; }
.closed-beta-icon { font-size: 2.5rem; margin-bottom: 16px; }
.closed-beta-content h3 { font-family: var(--font-display); font-size: clamp(1.3rem, 3vw, 1.75rem); font-weight: 700; color: #fff; margin-bottom: 16px; line-height: 1.3; }
.closed-beta-content p { font-size: 0.95rem; color: rgba(255,255,255,0.75); line-height: 1.7; margin-bottom: 24px; }
.closed-beta-content strong { color: #fff; font-weight: 600; }
.beta-subjects-grid { display: grid; gap: 20px; margin-bottom: 24px; }
@media (min-width: 768px) { .beta-subjects-grid { grid-template-columns: repeat(3, 1fr); gap: 24px; } }
.beta-subject-group { background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08); border-radius: var(--radius-md); padding: 20px; transition: all var(--transition-base); }
.beta-subject-group:hover { background: rgba(99,102,241,0.08); border-color: rgba(99,102,241,0.2); transform: translateY(-2px); }
.beta-subject-group h4 { font-family: var(--font-display); font-size: 0.95rem; font-weight: 700; color: var(--color-primary-light); margin-bottom: 12px; text-transform: uppercase; letter-spacing: 0.05em; }
.beta-subject-group ul { display: flex; flex-direction: column; gap: 8px; }
.beta-subject-group li { font-size: 0.85rem; color: rgba(255,255,255,0.65); padding-left: 16px; position: relative; }
.beta-subject-group li::before { content: '•'; position: absolute; left: 0; color: var(--color-primary-light); font-weight: 700; }
.beta-exclusivity { font-size: 0.92rem; color: rgba(255,255,255,0.8); line-height: 1.7; margin-bottom: 28px; padding: 16px; background: rgba(245,158,11,0.08); border-left: 3px solid var(--color-warning); border-radius: var(--radius-sm); }
.beta-cta-group { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.btn-secondary { background: linear-gradient(135deg, rgba(255,255,255,0.12), rgba(255,255,255,0.08)); color: #fff; border: 2px solid rgba(255,255,255,0.2); border-radius: var(--radius-full); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
.btn-secondary:hover { background: linear-gradient(135deg, rgba(255,255,255,0.18), rgba(255,255,255,0.12)); border-color: rgba(255,255,255,0.35); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(99,102,241,0.25); }
.beta-cta-btn { font-size: 0.95rem; padding: 16px 32px; }
.beta-refund-note { display: flex; align-items: center; gap: 6px; font-size: 0.8rem; color: rgba(255,255,255,0.5); }
.beta-refund-note svg { flex-shrink: 0; }

/* --- FOUNDER SECTION --- */
.founder-section { padding: 100px 0; background: var(--color-bg); }
.founder-card { display: grid; gap: 40px; align-items: center; max-width: 960px; margin: 0 auto; }
@media (min-width: 768px) { .founder-card { grid-template-columns: 1fr 1.2fr; gap: 56px; } }
.founder-video-area { position: relative; }
.founder-video-placeholder { background: linear-gradient(135deg, var(--color-bg-dark), var(--color-bg-dark-alt)); border-radius: var(--radius-xl); min-height: 300px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 16px; box-shadow: var(--shadow-xl); cursor: pointer; transition: all var(--transition-base); overflow: hidden; }
.founder-video-placeholder:hover { transform: translateY(-4px); box-shadow: var(--shadow-xl), var(--shadow-glow); }
.founder-play-btn { width: 64px; height: 64px; border-radius: 50%; background: rgba(99,102,241,0.4); display: flex; align-items: center; justify-content: center; border: 2px solid rgba(255,255,255,0.2); transition: all var(--transition-base); }
.founder-video-placeholder:hover .founder-play-btn { background: rgba(99,102,241,0.6); }
.founder-video-label { color: rgba(255,255,255,0.6); font-size: 0.85rem; }
.founder-quote { font-size: 1.05rem; font-style: italic; color: var(--color-text); line-height: 1.7; border-left: 3px solid var(--color-primary); padding-left: 20px; margin-bottom: 20px; }
.founder-text { font-size: 0.95rem; color: var(--color-text-muted); line-height: 1.7; margin-bottom: 16px; }
.founder-text strong { color: var(--color-text); }
.founder-credentials { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 24px; }
.credential { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; font-weight: 500; color: var(--color-text); background: var(--color-bg-alt); border: 1px solid var(--color-border); padding: 10px 16px; border-radius: var(--radius-full); }

/* --- BOOKING SECTION --- */
.booking-section { padding: 100px 0 80px; background: linear-gradient(135deg, var(--color-bg-dark) 0%, #1a1a3e 50%, var(--color-bg-dark-alt) 100%); }
.section-header-light { color: #fff; }
.section-tag-light { color: var(--color-primary-light); background: rgba(99,102,241,0.15); }
.section-title-light { color: #fff; }
.section-subtitle-light { color: rgba(255,255,255,0.65); }
.calendar-embed-wrapper { max-width: 800px; margin: 0 auto; background: #fff; border-radius: var(--radius-xl); overflow: hidden; box-shadow: var(--shadow-xl); }
.calendar-embed-wrapper iframe { display: block; width: 100%; min-height: 600px; }
.booking-fallback { text-align: center; margin-top: 20px; }
.booking-fallback p { font-size: 0.85rem; color: rgba(255,255,255,0.5); }
.booking-fallback a { color: var(--color-primary-light); font-weight: 600; }
.booking-fallback a:hover { text-decoration: underline; }

/* --- FOOTER --- */
.site-footer { background: var(--color-bg-dark); padding: 60px 0 32px; border-top: 1px solid rgba(255,255,255,0.05); }
.footer-content { display: grid; gap: 40px; margin-bottom: 40px; }
@media (min-width: 768px) { .footer-content { grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 32px; } }
.footer-brand { display: block; }
.footer-logo { height: 36px; width: auto; margin-bottom: 12px; filter: brightness(1.2); }
.footer-tagline { font-size: 0.85rem; color: rgba(255,255,255,0.5); line-height: 1.6; max-width: 260px; }
.footer-links-group h4 { font-size: 0.82rem; font-weight: 700; color: rgba(255,255,255,0.8); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 16px; }
.footer-links-group ul { display: flex; flex-direction: column; gap: 10px; }
.footer-links-group a { font-size: 0.85rem; color: rgba(255,255,255,0.5); transition: color var(--transition-fast); }
.footer-links-group a:hover { color: var(--color-primary-light); }
.social-links { display: flex; gap: 12px; }
.social-links a { width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,0.06); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.5); transition: all var(--transition-base); }
.social-links a:hover { background: var(--color-primary); color: #fff; transform: translateY(-2px); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 24px; text-align: center; }
.footer-bottom p { font-size: 0.8rem; color: rgba(255,255,255,0.35); }

/* --- SCROLL ANIMATIONS --- */
.fade-in-up { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in-up.visible { opacity: 1; transform: translateY(0); }