/* ACL Rehab Tracker - Website */

:root {
    --bg: #0D0D0D;
    --surface: #1A1A1A;
    --surface-light: #2A2A2A;
    --primary: #FF2D55;
    --success: #34C759;
    --blue: #4A9EFF;
    --text: #FFFFFF;
    --text-secondary: #8E8E93;
    --text-tertiary: #636366;
    --border: #2A2A2A;
    --card-bg: #1C1C1E;
    --max-width: 960px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: opacity 0.2s;
}

a:hover {
    opacity: 0.8;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(13, 13, 13, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
}

.nav-brand {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
}

.nav-brand span {
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 24px;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
}

.nav-links a:hover {
    color: var(--text);
    opacity: 1;
}

/* Hero */
.hero {
    padding: 140px 0 80px;
}

.hero .container {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.hero h1 {
    font-size: clamp(2.2rem, 5vw, 3.2rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.hero h1 .highlight {
    color: var(--primary);
}

.hero p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 480px;
    margin-bottom: 32px;
    line-height: 1.6;
}

.app-store-badge {
    display: inline-block;
    transition: transform 0.2s;
}

.app-store-badge:hover {
    transform: scale(1.03);
    opacity: 1;
}

.app-store-badge img {
    height: 48px;
}

/* Sections */
.section {
    padding: 64px 0;
}

.section-header {
    margin-bottom: 32px;
}

.section-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Feature Cards */
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.feature-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 24px;
}

.feature-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-bottom: 16px;
}

.feature-dot.pink { background: var(--primary); }
.feature-dot.blue { background: var(--blue); }
.feature-dot.green { background: var(--success); }
.feature-dot.orange { background: #FF9500; }

.feature-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* How It Works */
.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.step {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 24px;
}

.step-number {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    font-size: 0.85rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.step h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.step p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* CTA Section */
.cta {
    padding: 64px 0;
}

.cta-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 48px 32px;
    text-align: center;
}

.cta h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.cta p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 24px;
}

/* Footer */
.footer {
    border-top: 1px solid var(--border);
    padding: 32px 0;
}

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

.footer-left p {
    color: var(--text-tertiary);
    font-size: 0.8rem;
}

.footer-links {
    display: flex;
    gap: 20px;
    list-style: none;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.footer-links a:hover {
    color: var(--text);
    opacity: 1;
}

/* Legal Pages */
.legal {
    padding: 120px 0 80px;
    max-width: 720px;
    margin: 0 auto;
}

.legal h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.legal .last-updated {
    color: var(--text-tertiary);
    font-size: 0.85rem;
    margin-bottom: 40px;
}

.legal h2 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-top: 36px;
    margin-bottom: 12px;
    color: var(--text);
}

.legal p,
.legal li {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.75;
    margin-bottom: 12px;
}

.legal ul {
    padding-left: 24px;
    margin-bottom: 16px;
}

.legal li {
    margin-bottom: 6px;
}

.legal a {
    color: var(--primary);
}

/* Responsive */
@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: 1fr;
    }

    .steps {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .footer .container {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .hero {
        padding: 110px 0 48px;
    }

    .section {
        padding: 48px 0;
    }

    .cta {
        padding: 48px 0;
    }

    .cta-card {
        padding: 32px 24px;
    }

    .legal {
        padding: 100px 24px 60px;
    }
}

@media (max-width: 480px) {
    .nav-links {
        gap: 16px;
    }

    .nav-links a {
        font-size: 0.8rem;
    }

    .feature-card {
        padding: 20px;
    }

    .step {
        padding: 20px;
    }
}