/* Reset & Variables */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: #0D0F14;
    --surface: #161A22;
    --card: #1A1F2E;
    --border: #252B3B;
    --accent: #00E5A0;
    --accent-dim: #00C487;
    --orange: #FF6B35;
    --text-primary: #EDF0F7;
    --text-secondary: #7B8499;
    --text-muted: #4A5168;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header & Navigation */
header {
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar {
    padding: 20px 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 800;
    color: var(--text-primary);
}

.logo {
    font-size: 28px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
    align-items: center;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: var(--accent);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 28px;
    cursor: pointer;
}

/* Buttons */
.btn-primary {
    background: var(--accent);
    color: #000;
    padding: 12px 28px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 700;
    display: inline-block;
    transition: all 0.3s;
}

.btn-primary:hover {
    background: var(--accent-dim);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    padding: 12px 28px;
    border: 2px solid var(--border);
    border-radius: 12px;
    text-decoration: none;
    font-weight: 700;
    display: inline-block;
    transition: all 0.3s;
}

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

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    padding: 12px 32px;
    border: 2px solid var(--border);
    border-radius: 12px;
    text-decoration: none;
    font-weight: 700;
    display: inline-block;
    transition: all 0.3s;
}

.btn-outline:hover {
    border-color: var(--accent);
    background: rgba(0, 229, 160, 0.1);
    color: var(--accent);
}

.btn-large {
    padding: 16px 40px;
    font-size: 18px;
}

/* Hero Section */
.hero {
    padding: 100px 0;
    background: linear-gradient(135deg, #0D0F14 0%, #0D1A1A 50%, #0D0F14 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -200px;
    right: -100px;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(0, 229, 160, 0.1), transparent);
    border-radius: 50%;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
}

.hero-content h1 {
    font-size: 56px;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 24px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent), #00B4D8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 36px;
    font-weight: 900;
    color: var(--accent);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

/* App Mockup */
.app-mockup {
    font-size: 200px;
    text-align: center;
    position: relative;
}

.mockup-screen {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    background: var(--surface);
    border-radius: 20px;
    padding: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.workout-card {
    background: var(--card);
    padding: 20px;
    border-radius: 16px;
    border: 1px solid var(--border);
}

.workout-card h3 {
    font-size: 16px;
    margin-bottom: 8px;
}

.workout-card p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.progress-bar {
    background: var(--surface);
    height: 8px;
    border-radius: 10px;
    overflow: hidden;
}

.progress {
    background: linear-gradient(90deg, var(--accent), #00B4D8);
    height: 100%;
    border-radius: 10px;
    transition: width 0.3s;
}

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

.section-title {
    font-size: 42px;
    font-weight: 900;
    text-align: center;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 60px;
}

/* Features */
.features {
    background: var(--surface);
}

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

.feature-card {
    background: var(--card);
    padding: 32px;
    border-radius: 20px;
    border: 1px solid var(--border);
    transition: all 0.3s;
}

.feature-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* How It Works */
.how-it-works {
    background: var(--bg);
}

.steps {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    max-width: 1000px;
    margin: 0 auto;
}

.step {
    flex: 1;
    text-align: center;
    background: var(--card);
    padding: 32px 24px;
    border-radius: 16px;
    border: 1px solid var(--border);
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--accent), #00B4D8);
    color: #000;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 900;
    margin: 0 auto 20px;
}

.step h3 {
    font-size: 18px;
    margin-bottom: 12px;
}

.step p {
    color: var(--text-secondary);
    font-size: 14px;
}

.step-arrow {
    font-size: 32px;
    color: var(--accent);
    flex-shrink: 0;
}

/* Pricing */
.pricing {
    background: var(--surface);
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    max-width: 1100px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--card);
    border: 2px solid var(--border);
    border-radius: 24px;
    padding: 40px 32px;
    text-align: center;
    position: relative;
    transition: all 0.3s;
}

.pricing-card:hover {
    border-color: var(--accent);
    transform: translateY(-8px);
}

.pricing-card.popular {
    border-color: var(--accent);
    box-shadow: 0 0 40px rgba(0, 229, 160, 0.2);
}

.plan-badge {
    background: var(--surface);
    color: var(--text-secondary);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    display: inline-block;
    margin-bottom: 20px;
}

.popular-badge {
    background: linear-gradient(135deg, var(--accent), #00B4D8);
    color: #000;
}

.pricing-card h3 {
    font-size: 28px;
    margin-bottom: 20px;
}

.price {
    margin-bottom: 32px;
}

.amount {
    font-size: 48px;
    font-weight: 900;
    color: var(--accent);
}

.period {
    font-size: 18px;
    color: var(--text-secondary);
}

.features-list {
    list-style: none;
    text-align: left;
    margin-bottom: 32px;
}

.features-list li {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
}

.features-list li:last-child {
    border-bottom: none;
}

.pricing-note {
    text-align: center;
    margin-top: 40px;
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.8;
}

/* Testimonials */
.testimonials {
    background: var(--bg);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.testimonial-card {
    background: var(--card);
    padding: 32px;
    border-radius: 20px;
    border: 1px solid var(--border);
}

.stars {
    font-size: 20px;
    margin-bottom: 16px;
}

.testimonial-card p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
    font-style: italic;
}

.author strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: 4px;
}

.author span {
    color: var(--text-muted);
    font-size: 14px;
}

/* CTA */
.cta {
    background: linear-gradient(135deg, var(--accent) 0%, #00B4D8 100%);
    text-align: center;
    color: #000;
}

.cta h2 {
    font-size: 42px;
    font-weight: 900;
    margin-bottom: 16px;
}

.cta p {
    font-size: 18px;
    margin-bottom: 32px;
    opacity: 0.8;
}

.cta .btn-primary {
    background: #000;
    color: var(--accent);
}

.cta .btn-primary:hover {
    background: #111;
}

/* Footer */
footer {
    background: var(--surface);
    padding: 60px 0 30px;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-section p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

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

.social-links {
    display: flex;
    gap: 16px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 36px;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-image {
        display: none;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .steps {
        flex-direction: column;
    }
    
    .step-arrow {
        transform: rotate(90deg);
    }
    
    .pricing-cards {
        grid-template-columns: 1fr;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}