:root {
    --bg-dark: #090A0F;
    --bg-surface: #10121A;
    --bg-glass: rgba(18, 22, 34, 0.75);
    --bg-glass-card: rgba(22, 28, 45, 0.65);
    --border-glass: rgba(52, 211, 153, 0.18);
    --border-subtle: rgba(255, 255, 255, 0.08);
    
    --primary: #10B981;
    --primary-light: #34D399;
    --primary-glow: rgba(52, 211, 153, 0.25);
    
    --accent-sun: #F59E0B;
    --accent-water: #06B6D4;
    --accent-compost: #8B5CF6;
    
    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    
    --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 10px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* Background Gradients & Ambient Glow */
.bg-mesh {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 0;
    background: radial-gradient(circle at 20% 20%, rgba(16, 185, 129, 0.12) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(6, 182, 212, 0.10) 0%, transparent 50%),
                radial-gradient(circle at 50% 50%, rgba(139, 92, 246, 0.06) 0%, transparent 60%);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background: rgba(9, 10, 15, 0.85);
    border-bottom: 1px solid var(--border-subtle);
    padding: 16px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.25rem;
}

.brand-logo {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    border: 1px solid var(--border-glass);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-light);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 9999px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, #059669 100%);
    color: white;
    box-shadow: 0 4px 20px var(--primary-glow);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(16, 185, 129, 0.4);
}

/* Hero Section */
.hero {
    padding: 160px 0 100px 0;
    text-align: center;
}

.badge-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    border-radius: 9999px;
    background: rgba(52, 211, 153, 0.1);
    border: 1px solid var(--border-glass);
    color: var(--primary-light);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    max-width: 900px;
    margin: 0 auto 24px auto;
}

.gradient-text {
    background: linear-gradient(135deg, #34D399 0%, #06B6D4 50%, #A78BFA 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 720px;
    margin: 0 auto 40px auto;
    font-weight: 400;
}

.hero-cta-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.app-store-badge {
    transition: var(--transition);
}

.app-store-badge:hover {
    transform: scale(1.05);
}

.store-trust {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Screenshots Showcase Carousel */
.showcase-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
    margin-top: 60px;
}

.screenshot-card {
    background: var(--bg-glass-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 12px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: var(--transition);
}

.screenshot-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-glass);
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
}

.screenshot-img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    display: block;
}

/* Feature Sections */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px auto;
}

.section-tag {
    color: var(--primary-light);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 12px;
    display: block;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* 3-Column Features */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-box {
    background: var(--bg-glass-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-box:hover {
    border-color: var(--border-glass);
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}

.feature-icon-wrapper {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: rgba(52, 211, 153, 0.1);
    border: 1px solid var(--border-glass);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 24px;
}

.feature-heading {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.feature-text {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Scientific Cognitive Gym Matrix */
.gyms-table-container {
    background: var(--bg-glass-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-top: 40px;
}

.gyms-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.gyms-table th {
    background: rgba(255, 255, 255, 0.03);
    padding: 18px 24px;
    font-weight: 700;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-subtle);
}

.gyms-table td {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.gyms-table tr:last-child td {
    border-bottom: none;
}

.gym-name {
    font-weight: 600;
    color: var(--primary-light);
}

/* FAQ Accordion */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    background: var(--bg-glass-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 24px 28px;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--border-glass);
}

.faq-q {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.faq-a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Footer */
.footer {
    background: #06070A;
    border-top: 1px solid var(--border-subtle);
    padding: 80px 0 40px 0;
    margin-top: 100px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 60px;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 16px;
    max-width: 320px;
    font-size: 0.9rem;
}

.footer-col h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-col a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-col a:hover {
    color: var(--primary-light);
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid var(--border-subtle);
    padding-top: 32px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .showcase-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    .showcase-grid {
        grid-template-columns: 1fr;
    }
    .features-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .nav-menu {
        display: none;
    }
}