/* === DYNAMIC BRAIN HUB — GCSE MATHS SALES PAGE (DARK THEME) === */
:root {
    --color-primary: #FFFFFF;
    --color-primary-dark: #E2E8F0;
    --color-primary-light: #FFFFFF;
    --color-primary-glow: rgba(255, 255, 255, 0.2);
    --color-accent: #FFFFFF;
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-bg: #050A15;
    --color-bg-alt: #0A1128;
    --color-bg-dark: #050A15;
    --color-bg-dark-alt: #0A1128;
    --color-text: #FFFFFF;
    --color-text-muted: #A0AEC0;
    --color-text-light: #718096;
    --color-border: rgba(255, 255, 255, 0.15);
    --color-border-light: rgba(255, 255, 255, 0.05);
    --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(212, 175, 55, 0.2);
    --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: #FFFFFF; color: #050A15; border-radius: var(--radius-full); box-shadow: 0 4px 14px rgba(255,255,255,0.2); font-weight: 600; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(255,255,255,0.15); }
.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 rgba(255,255,255,0.2); } 50% { box-shadow: 0 4px 30px rgba(212,175,55,0.5); } }

/* --- 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-text-muted); background: rgba(255,255,255,0.05); 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-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(5,10,21,0.9); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--color-border-light); transition: all var(--transition-base); }
.navbar.scrolled { background: rgba(5,10,21,0.95); 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: 100px; 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: #050A15; background: #FFFFFF; border-radius: var(--radius-full); box-shadow: 0 2px 8px rgba(255,255,255,0.15); 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 rgba(255,255,255,0.2); }
.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(10,17,40,0.98); 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: radial-gradient(circle at top center, #0A1128, #050A15 70%); }
.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(255,255,255,0.03), transparent 70%); top: -100px; right: -100px; }
.hero-orb-2 { width: 400px; height: 400px; background: radial-gradient(circle, rgba(255,255,255,0.02), 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-text-muted); background: rgba(255,255,255,0.05); border: 1px solid var(--color-border); 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; }
/* Priority System Badge */
.priority-system-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(139, 92, 246, 0.15));
    border: 1px solid rgba(99, 102, 241, 0.4);
    border-radius: 50px;
    padding: 8px 16px;
    margin-bottom: 16px;
    font-size: 0.8rem;
    font-weight: 600;
    color: #a5b4fc;
    letter-spacing: 0.025em;
}
.priority-badge-icon {
    font-size: 1rem;
}
.priority-badge-text {
    color: #c7d2fe;
}
@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; }
.highlight-exclusive { background: linear-gradient(135deg, #f59e0b, #fbbf24); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; font-weight: 700; }
.highlight-human { background: linear-gradient(135deg, #818cf8, #a5b4fc); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; font-weight: 700; }
.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); border: 1px solid var(--color-border); }
.hero-video-section { padding: 40px 0 0; }
.hero-video-wrapper { max-width: 900px; margin: 0 auto; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-xl); border: 1px solid var(--color-border); }

.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(255,255,255,0.1); 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(255,255,255,0.15); 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; }
.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: rgba(255,255,255,0.03); 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; } }

/* --- WHO THIS IS FOR SECTION --- */
.who-section { padding: 100px 0; background: var(--color-bg); }
.who-grid { display: grid; gap: 24px; }
@media (min-width: 640px) { .who-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .who-grid { grid-template-columns: repeat(3, 1fr); } }
.who-card { background: rgba(255,255,255,0.03); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 28px; transition: all var(--transition-base); backdrop-filter: blur(8px); }
.who-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(255,255,255,0.25); }
.who-icon { width: 48px; height: 48px; border-radius: var(--radius-md); background: rgba(255,255,255,0.05); display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.who-card-title { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; color: var(--color-text); margin-bottom: 8px; }
.who-card-text { font-size: 0.9rem; color: var(--color-text-muted); line-height: 1.6; }

/* --- WHAT'S INCLUDED SECTION --- */
.included-section { padding: 100px 0; background: var(--color-bg); }
.included-grid { display: grid; gap: 24px; }
@media (min-width: 640px) { .included-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .included-grid { grid-template-columns: repeat(4, 1fr); } }
.included-card { background: rgba(255,255,255,0.03); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 24px; transition: all var(--transition-base); position: relative; overflow: hidden; backdrop-filter: blur(8px); }
.included-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(255,255,255,0.25); }
.included-number { font-family: var(--font-display); font-size: 2rem; font-weight: 800; color: rgba(255,255,255,0.05); position: absolute; top: -10px; right: 10px; }
.included-title { font-family: var(--font-display); font-size: 1rem; font-weight: 700; color: var(--color-text); margin-bottom: 8px; line-height: 1.3; }
.included-text { font-size: 0.85rem; color: var(--color-text-muted); line-height: 1.6; }

/* --- HOW IT WORKS SECTION --- */
.how-section { padding: 100px 0; background: var(--color-bg-alt); }
.steps-container { display: flex; flex-direction: column; align-items: center; gap: 0; max-width: 700px; margin: 0 auto; }
@media (min-width: 768px) { .steps-container { flex-direction: row; flex-wrap: wrap; justify-content: center; gap: 16px; } }
.step-card { background: rgba(255,255,255,0.03); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 24px; display: flex; gap: 16px; align-items: flex-start; width: 100%; transition: all var(--transition-base); backdrop-filter: blur(8px); }
@media (min-width: 768px) { .step-card { width: calc(50% - 8px); } }
.step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(255,255,255,0.25); }
.step-number { width: 40px; height: 40px; border-radius: 50%; background: #FFFFFF; color: #050A15; font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.step-content { flex: 1; }
.step-title { font-family: var(--font-display); font-size: 1rem; font-weight: 700; color: var(--color-text); margin-bottom: 8px; }
.step-text { font-size: 0.85rem; color: var(--color-text-muted); line-height: 1.6; }
.step-connector { display: none; }
@media (min-width: 768px) { .step-connector { display: flex; align-items: center; justify-content: center; width: calc(50% - 8px); padding: 8px; } }

/* --- WHY PARENTS CHOOSE US SECTION --- */
.why-section { padding: 100px 0; background: var(--color-bg); }
.why-content { max-width: 800px; margin: 0 auto; }
.why-main-text { text-align: center; margin-bottom: 48px; }
.why-lead { font-size: 1.2rem; color: var(--color-text); line-height: 1.7; }
.why-benefits { display: flex; flex-direction: column; gap: 20px; }
.why-benefit { display: flex; gap: 16px; align-items: flex-start; background: rgba(255,255,255,0.03); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 20px 24px; transition: all var(--transition-base); }
.why-benefit:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: rgba(255,255,255,0.25); }
.why-benefit-icon { width: 32px; height: 32px; border-radius: 50%; background: rgba(34,197,94,0.1); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.why-benefit-text { flex: 1; }
.why-benefit-text h4 { font-family: var(--font-display); font-size: 1rem; font-weight: 700; color: var(--color-text); margin-bottom: 4px; }
.why-benefit-text p { font-size: 0.9rem; color: var(--color-text-muted); line-height: 1.5; }

/* --- WHAT MAKES THIS DIFFERENT SECTION --- */
.different-section { padding: 100px 0; background: var(--color-bg-alt); }
.comparison-container { display: grid; gap: 32px; max-width: 900px; margin: 0 auto; }
@media (min-width: 768px) { .comparison-container { grid-template-columns: 1fr 1fr; } }
.comparison-card { border-radius: var(--radius-xl); padding: 32px; backdrop-filter: blur(8px); }
.comparison-old { background: rgba(239,68,68,0.08); border: 1px solid rgba(239,68,68,0.2); }
.comparison-new { background: rgba(212,175,55,0.08); border: 1px solid rgba(212,175,55,0.25); }
.comparison-card-title { font-family: var(--font-display); font-size: 1.2rem; font-weight: 700; color: var(--color-text); margin-bottom: 20px; display: flex; align-items: center; gap: 10px; }
.comparison-list { display: flex; flex-direction: column; gap: 12px; }
.comparison-list li { display: flex; align-items: center; gap: 10px; font-size: 0.9rem; color: var(--color-text-muted); }
.comparison-list li svg { flex-shrink: 0; }
.comparison-split { display: flex; flex-direction: column; gap: 24px; }
.comparison-split-section h4 { font-family: var(--font-display); font-size: 0.9rem; font-weight: 700; color: var(--color-text); margin-bottom: 12px; text-transform: uppercase; letter-spacing: 0.05em; }
.comparison-split .comparison-list li { font-size: 0.85rem; }

/* --- BOOKING SECTION --- */
.booking-section { padding: 100px 0 80px; background: linear-gradient(135deg, #050A15 0%, #0A1128 50%, #050A15 100%); }
.section-header-light { color: #fff; }
.section-tag-light { color: var(--color-primary-light); background: rgba(255,255,255,0.08); }
.section-title-light { color: #fff; }
.section-subtitle-light { color: rgba(255,255,255,0.6); }
.booking-card { max-width: 600px; margin: 0 auto 32px; background: rgba(255,255,255,0.03); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: 40px 32px; backdrop-filter: blur(12px); }
.booking-card-content { text-align: center; }
.booking-card-title { font-family: var(--font-display); font-size: 1.2rem; font-weight: 700; color: var(--color-text); margin-bottom: 24px; }
.booking-list { display: flex; flex-direction: column; gap: 12px; text-align: left; max-width: 300px; margin: 0 auto 32px; }
.booking-list li { display: flex; align-items: center; gap: 10px; font-size: 0.95rem; color: var(--color-text); }
.booking-list li svg { flex-shrink: 0; }
.booking-btn { margin-bottom: 16px; }
.booking-note { font-size: 0.85rem; color: var(--color-text-muted); }
.booking-contact { text-align: center; color: rgba(255,255,255,0.7); }
.booking-contact p { font-size: 0.9rem; margin-bottom: 12px; }
.contact-links { display: flex; flex-direction: column; gap: 12px; align-items: center; }
.contact-link { display: inline-flex; align-items: center; gap: 8px; color: var(--color-primary-light); font-weight: 600; transition: all var(--transition-fast); }
.contact-link:hover { color: var(--color-primary); transform: translateY(-2px); }
.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: 88px; 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: #050A15; 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(255,255,255,0.55); }

/* === NEW COMPONENT CLASSES (for upcoming Tasks 2-4) === */

/* --- Subject Card --- */
.subject-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    transition: all var(--transition-base);
    backdrop-filter: blur(8px);
    position: relative;
    overflow: hidden;
}
.subject-card:hover {
    transform: translateY(-6px) scale(1.02);
    border-color: rgba(255, 255, 255, 0.25);
    box-shadow: 0 12px 40px rgba(212, 175, 55, 0.15), 0 0 0 1px rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.06);
}
.subject-card .subject-icon {
    font-size: 2rem;
    margin-bottom: 16px;
    line-height: 1;
}
.subject-card h3 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 10px;
}
.subject-card p {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    line-height: 1.65;
}
.subject-card .subject-link {
    display: inline-block;
    margin-top: 12px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-primary, #6366f1);
    text-decoration: none;
    transition: color var(--transition-base);
}
.subject-card .subject-link:hover {
    color: var(--color-accent, #8b5cf6);
}

/* --- Subjects Section --- */
.subjects-section {
    padding: 100px 0;
    background: var(--color-bg-alt);
}
.subjects-grid {
    display: grid;
    gap: 24px;
    grid-template-columns: 1fr;
}
@media (min-width: 640px) {
    .subjects-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
    .subjects-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1280px) {
    .subjects-grid { grid-template-columns: repeat(4, 1fr); }
}

/* --- Hero Urgency & Trust Badges --- */
.hero-urgency {
    margin-top: 24px;
}
.hero-trust-badges {
    display: grid;
    gap: 16px;
    grid-template-columns: 1fr;
}
@media (min-width: 640px) {
    .hero-trust-badges { grid-template-columns: repeat(3, 1fr); }
}
.trust-badge-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px 20px;
    text-align: center;
    backdrop-filter: blur(8px);
    transition: all var(--transition-base);
}
.trust-badge-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.25);
    box-shadow: var(--shadow-lg);
}
.trust-badge-number {
    font-family: var(--font-display);
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--color-text);
    line-height: 1;
    margin-bottom: 8px;
}
.trust-badge-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
    color: var(--color-text-muted);
}
.trust-badge-label {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 6px;
}
.trust-badge-detail {
    font-size: 0.78rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

/* --- Pillar Card --- */
.pillar-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    display: flex;
    gap: 24px;
    align-items: flex-start;
    transition: all var(--transition-base);
    backdrop-filter: blur(8px);
}

/* --- Urgency Badge --- */
.urgency-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
    font-size: 0.8rem;
    font-weight: 700;
    padding: 6px 16px;
    border-radius: var(--radius-full);
    animation: urgencyPulse 2s ease-in-out infinite;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
@keyframes urgencyPulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.3); }
    50% { box-shadow: 0 0 12px 4px rgba(239, 68, 68, 0.15); }
}

/* --- Countdown Display --- */
.countdown-display {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    color: var(--color-text);
    letter-spacing: -0.02em;
    line-height: 1;
}

/* --- Feature Icon Box --- */
.feature-icon-box {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all var(--transition-base);
}
.feature-icon-box:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
}

/* --- HOW IT WORKS (TWO PILLAR) SECTION --- */
.how-it-works-section { padding: 100px 0; background: var(--color-bg-alt); }
.pillars-container { display: grid; gap: 32px; margin-bottom: 80px; }
@media (min-width: 768px) { .pillars-container { grid-template-columns: 1fr 1fr; } }
.pillar-card .pillar-icon { width: 64px; height: 64px; border-radius: var(--radius-lg); background: rgba(99, 102, 241, 0.1); border: 1px solid rgba(99, 102, 241, 0.2); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.pillar-card .pillar-content { flex: 1; min-width: 0; }
.pillar-card .pillar-content h3 { font-family: var(--font-display); font-size: 1.25rem; font-weight: 700; color: var(--color-text); margin-bottom: 4px; }
.pillar-card .pillar-tagline { font-size: 0.9rem; color: var(--color-text-muted); margin-bottom: 20px; }
.pillar-card .pillar-features { display: flex; flex-direction: column; gap: 12px; }
.pillar-card .pillar-features li { display: flex; align-items: flex-start; gap: 10px; font-size: 0.9rem; color: var(--color-text-muted); line-height: 1.5; }
.pillar-card .pillar-features li svg { flex-shrink: 0; margin-top: 3px; }

/* --- INCLUDED FEATURES GRID (10-item) --- */
.included-features-grid { display: grid; gap: 16px; }
@media (min-width: 640px) { .included-features-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .included-features-grid { grid-template-columns: repeat(3, 1fr); } }
.feature-item { display: flex; flex-direction: column; align-items: center; gap: 12px; text-align: center; padding: 24px 16px; background: rgba(255, 255, 255, 0.03); border: 1px solid var(--color-border); border-radius: var(--radius-lg); transition: all var(--transition-base); backdrop-filter: blur(8px); }
.feature-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(255, 255, 255, 0.25); }
.feature-item .feature-title { font-family: var(--font-display); font-size: 0.85rem; font-weight: 700; color: var(--color-text); line-height: 1.3; }
.feature-item .feature-desc { font-size: 0.78rem; color: var(--color-text-muted); line-height: 1.5; }

/* --- 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); }

/* --- VIDEO GRID (Section: See the Platform in Action) --- */
.videos-section {
    margin-top: 80px;
    padding-bottom: 60px;
}
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}
.video-card {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.video-card-title {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.3;
}
.video-card-subtext {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-bottom: 4px;
}

/* === COMPARISON TABLE === */
.comparison-section {
    padding: 100px 0;
    background: var(--color-bg-alt);
}
.comparison-table-wrapper {
    max-width: 960px;
    margin: 0 auto;
    border-radius: var(--radius-xl);
    overflow-x: auto;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--color-border);
    backdrop-filter: blur(8px);
}
.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    min-width: 600px;
}
.comparison-table thead tr {
    border-bottom: 1px solid var(--color-border);
}
.comparison-table th,
.comparison-table td {
    padding: 18px 24px;
    text-align: left;
    vertical-align: middle;
}
.feature-col {
    width: 22%;
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--color-text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    background: rgba(255, 255, 255, 0.02);
}
.old-col {
    width: 39%;
    background: rgba(239, 68, 68, 0.06);
    border-left: 3px solid rgba(239, 68, 68, 0.3);
}
.new-col {
    width: 39%;
    background: rgba(212, 175, 55, 0.06);
    border-left: 3px solid rgba(212, 175, 55, 0.3);
}
.table-header-content {
    display: flex;
    align-items: center;
    gap: 10px;
}
.table-icon {
    font-size: 1.2rem;
    line-height: 1;
}
.table-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.95rem;
}
.old-col .table-title {
    color: var(--color-danger);
}
.new-col .table-title {
    color: var(--color-accent);
}
.table-subtitle {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-weight: 400;
    display: block;
    margin-top: 2px;
}
.comparison-table tbody tr {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: background var(--transition-fast);
}
.comparison-table tbody tr:last-child {
    border-bottom: none;
}
.comparison-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.03);
}
.feature-label {
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.88rem;
    background: rgba(255, 255, 255, 0.02);
}
.old-value {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    line-height: 1.6;
}
.old-value strong {
    color: var(--color-danger);
    font-weight: 700;
    display: block;
    margin-bottom: 4px;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.new-value {
    color: var(--color-text);
    font-size: 0.85rem;
    line-height: 1.6;
    font-weight: 500;
}
.new-value strong {
    color: var(--color-accent);
    font-weight: 700;
    display: block;
    margin-bottom: 4px;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
@media (max-width: 768px) {
    .comparison-table-wrapper {
        margin: 0 -8px;
        border-radius: var(--radius-lg);
    }
    .comparison-table th,
    .comparison-table td {
        padding: 14px 16px;
        font-size: 0.82rem;
    }
    .feature-col {
        width: 28%;
    }
    .old-col,
    .new-col {
        width: 36%;
    }
    .table-header-content {
        flex-direction: column;
        gap: 4px;
        text-align: center;
    }
}
@media (max-width: 580px) {
    .comparison-table-wrapper {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    .comparison-table thead {
        display: none;
    }
    .comparison-table tbody tr {
        display: flex;
        flex-direction: column;
        padding: 20px 16px;
        gap: 12px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .comparison-table tbody tr:last-child {
        border-bottom: none;
    }
    .feature-label {
        font-size: 0.75rem;
        text-transform: uppercase;
        letter-spacing: 0.08em;
        color: var(--color-text-muted);
        background: transparent;
        padding: 0 0 4px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .old-value::before {
        content: '❌ Conventional: ';
        font-weight: 700;
        color: var(--color-danger);
        font-size: 0.72rem;
        text-transform: uppercase;
        letter-spacing: 0.04em;
    }
    .new-value::before {
        content: '⚡ Dynamic Brain Hub: ';
        font-weight: 700;
        color: var(--color-accent);
        font-size: 0.72rem;
        text-transform: uppercase;
        letter-spacing: 0.04em;
    }
    .old-value,
    .new-value {
        font-size: 0.85rem;
    }
    .old-value strong,
    .new-value strong {
        display: inline;
        font-size: inherit;
        text-transform: none;
        letter-spacing: normal;
        margin-bottom: 0;
    }
}

/* === URGENCY SECTION === */
.urgency-section {
    padding: 80px 0 100px;
    background: var(--color-bg);
}
.urgency-banner {
    display: grid;
    gap: 48px;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 48px 40px;
    backdrop-filter: blur(8px);
    position: relative;
    overflow: hidden;
}
.urgency-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-danger), var(--color-warning), var(--color-danger));
    background-size: 200% 100%;
    animation: gradientShift 3s ease-in-out infinite;
}
@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}
@media (min-width: 768px) {
    .urgency-banner {
        grid-template-columns: 1.3fr 0.7fr;
        gap: 48px;
        padding: 56px 48px;
    }
}
.urgency-left {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.urgency-headline {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3.5vw, 2rem);
    font-weight: 800;
    color: var(--color-text);
    line-height: 1.2;
    letter-spacing: -0.02em;
}
.countdown-inline {
    color: var(--color-danger);
    font-weight: 900;
}
.urgency-sub {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}
.urgency-value {
    background: rgba(255, 255, 255, 0.03);
    border-left: 3px solid var(--color-success);
    padding: 16px 20px;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}
.urgency-value p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}
.urgency-value strong {
    color: var(--color-text);
}
.urgency-right {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    text-align: center;
}
.urgency-guarantee {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    letter-spacing: 0.02em;
}
@media (max-width: 767px) {
    .urgency-right {
        align-items: stretch;
    }
    .urgency-right .btn {
        width: 100%;
    }
}
.hero-urgency {
    margin-top: 20px;
}

/* === ACCESSIBILITY: Skip to Content Link === */
.skip-to-content {
    position: absolute;
    top: -100%;
    left: 16px;
    z-index: 10000;
    padding: 12px 24px;
    background: #FFFFFF;
    color: #050A15;
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: var(--radius-sm);
    transition: top var(--transition-fast);
    text-decoration: none;
}
.skip-to-content:focus {
    top: 8px;
}

/* === ACCESSIBILITY: Focus-visible styles for keyboard navigation === */
*:focus-visible {
    outline: 2px solid rgba(255, 255, 255, 0.6);
    outline-offset: 3px;
}
.btn:focus-visible {
    outline: 2px solid #050A15;
    outline-offset: 3px;
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.4);
}
.nav-links a:focus-visible,
.contact-link:focus-visible {
    outline: 2px solid rgba(255, 255, 255, 0.6);
    outline-offset: 4px;
    border-radius: 2px;
}
.social-links a:focus-visible {
    outline: 2px solid rgba(255, 255, 255, 0.6);
    outline-offset: 3px;
}
.skip-to-content:focus-visible {
    outline: 2px solid #050A15;
    outline-offset: 3px;
}
.mobile-menu-btn:focus-visible {
    outline: 2px solid rgba(255, 255, 255, 0.6);
    outline-offset: 4px;
    border-radius: var(--radius-sm);
}
.play-button-ring:focus-visible {
    outline: 2px solid rgba(255, 255, 255, 0.6);
    outline-offset: 4px;
}

/* === RESPONSIVE: Pillar cards — stack on small screens === */
@media (max-width: 640px) {
    .pillar-card {
        flex-direction: column;
        align-items: flex-start;
        padding: 28px 24px;
        gap: 16px;
    }
    .pillar-card .pillar-icon {
        margin-bottom: 4px;
    }
}

/* === RESPONSIVE: Wide screens — broader container === */
@media (min-width: 1440px) {
    .container {
        max-width: 1320px;
    }
}

/* === RESPONSIVE: Urgency banner — tighter padding on mobile === */
@media (max-width: 640px) {
    .urgency-banner {
        padding: 32px 24px;
        gap: 32px;
    }
}

/* === RESPONSIVE: Booking card — tighter on mobile === */
@media (max-width: 480px) {
    .booking-card {
        padding: 32px 20px;
    }
}

/* === RESPONSIVE: Comparison table — improved mobile stacking labels === */
@media (max-width: 580px) {
    .comparison-table tbody tr {
        position: relative;
    }
    .feature-label {
        display: block;
        padding-bottom: 4px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        margin-bottom: 4px;
    }
}

/* === ACCESSIBILITY: Ensure interactive elements have min touch target === */
.mobile-menu-btn {
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}
@media (min-width: 992px) {
    .mobile-menu-btn {
        display: none;
    }
}

/* === ACCESSIBILITY: Reduced motion preference === */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    html {
        scroll-behavior: auto;
    }
    .fade-in-up {
        opacity: 1;
        transform: none;
    }
}

/* === RESPONSIVE: Subject cards — touch-friendly padding on mobile === */
@media (max-width: 640px) {
    .subject-card {
        padding: 24px 20px;
    }
    .subject-card h3 {
        font-size: 1.05rem;
    }
    .subject-card p {
        font-size: 0.85rem;
    }
}

/* === RESPONSIVE: Hero — tighten spacing on mobile === */
@media (max-width: 480px) {
    .hero-section {
        padding: 88px 0 48px;
    }
    .hero-headline {
        font-size: clamp(1.75rem, 7vw, 2.5rem);
    }
    .hero-subheadline {
        font-size: 0.95rem;
    }
    .hero-trust-badges {
        gap: 12px;
    }
    .trust-badge-card {
        padding: 20px 16px;
    }
    .trust-badge-number {
        font-size: 2.2rem;
    }
}

/* === RESPONSIVE: Section padding — reduce on mobile === */
@media (max-width: 640px) {
    .subjects-section,
    .who-section,
    .included-section,
    .how-section,
    .why-section,
    .different-section,
    .how-it-works-section {
        padding: 72px 0;
    }
    .section-header {
        margin-bottom: 40px;
    }
    .section-title {
        font-size: clamp(1.5rem, 5vw, 2rem);
    }
    .section-subtitle {
        font-size: 1rem;
    }
    .urgency-section {
        padding: 60px 0 80px;
    }
}

/* === RESPONSIVE: Footer — single column on mobile === */
@media (max-width: 640px) {
    .footer-content {
        gap: 32px;
    }
    .site-footer {
        padding: 48px 0 24px;
    }
}

.location-marquee-wrapper { width: 100%; background: rgba(10,17,40,0.6); border-bottom: 1px solid var(--color-border-light); padding: 24px 0; position: relative; z-index: 10; backdrop-filter: blur(8px); display: flex; align-items: center; gap: 40px; }
.location-marquee-label { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; color: var(--color-text); text-transform: uppercase; letter-spacing: 0.15em; white-space: nowrap; padding-left: 48px; z-index: 3; flex-shrink: 0; min-width: 200px; }
@media (max-width: 768px) { .location-marquee-label { padding-left: 24px; font-size: 0.9rem; min-width: 150px; } }
.location-marquee-wrapper::after { content: ''; position: absolute; top: 0; bottom: 0; right: 0; width: 120px; z-index: 2; pointer-events: none; background: linear-gradient(to left, rgba(10,17,40,0.6), transparent); }
.location-marquee { flex: 1; overflow: hidden; position: relative; min-width: 0; }
.location-marquee-track { display: flex; gap: 80px; animation: marqueeScroll 40s linear infinite; will-change: transform; }
.location-item { font-family: var(--font-display); font-size: 0.95rem; font-weight: 600; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.15em; white-space: nowrap; display: inline-flex; align-items: center; }
.location-item::before { content: '•'; margin-right: 80px; color: var(--color-border); font-size: 0.5rem; }
.location-item:first-child::before { display: none; }
@keyframes marqueeScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }
@media (max-width: 768px) { .location-marquee-track { gap: 60px; animation-duration: 30s; } .location-item::before { margin-right: 60px; } }