/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #000000;
    --text-primary: #000000;
    --text-secondary: #666666;
    --background: #FFFFFF;
    --surface: #F8F8F8;
    --border: #E0E0E0;
    --shadow: none;
}

[data-theme="dark"] {
    --primary-color: #FFFFFF;
    --text-primary: #FFFFFF;
    --text-secondary: #999999;
    --background: #000000;
    --surface: #111111;
    --border: #333333;
    --shadow: none;
}

body {
    font-family: 'IBM Plex Mono', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--background);
    font-weight: 400;
    letter-spacing: -0.02em;
}

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

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

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
}

.logo {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.03em;
}

.nav {
    display: flex;
    gap: 24px;
}

.nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 400;
    font-size: 14px;
    transition: color 0.15s ease;
}

.nav a:hover {
    color: var(--text-primary);
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: var(--background);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero-title {
    font-size: 56px;
    font-weight: 600;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--text-primary);
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.6;
    font-weight: 400;
}

.hero-cta {
    display: flex;
    gap: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 32px;
    border-radius: 8px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.15s ease;
    cursor: pointer;
    border: none;
    font-size: 15px;
}

.btn-primary {
    background: var(--text-primary);
    color: var(--background);
}

.btn-primary:hover {
    opacity: 0.8;
}

/* Screenshot */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.screenshot-container {
    position: relative;
    width: 100%;
    max-width: 400px;
    background: var(--surface);
    border-radius: 12px;
    padding: 8px;
    border: 1px solid var(--border);
}

.app-screenshot {
    width: 100%;
    height: auto;
    border-radius: 6px;
    background: var(--surface);
    transition: opacity 0.2s ease;
    display: block;
}

.app-screenshot:hover {
    opacity: 0.9;
}

/* Features Section */
.features {
    padding: 100px 0;
    background: var(--background);
}

.section-title {
    font-size: 40px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 80px;
    color: var(--text-primary);
    letter-spacing: -0.03em;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--surface);
    padding: 32px;
    border-radius: 8px;
    border: 1px solid var(--border);
    transition: background-color 0.15s ease;
}

.feature-card:hover {
    background: var(--background);
}

.feature-icon {
    font-size: 24px;
    margin-bottom: 16px;
    opacity: 0.8;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 500;
    margin-bottom: 12px;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.5;
    font-size: 14px;
}

/* Beta Section */
.beta-section {
    padding: 100px 0;
    background: var(--surface);
    text-align: center;
}

.beta-content {
    max-width: 600px;
    margin: 0 auto;
}

.beta-section .section-title {
    margin-bottom: 24px;
}

.beta-section p {
    font-size: 16px;
    margin-bottom: 40px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.beta-section .btn-primary {
    background: var(--text-primary);
    color: var(--background);
}

/* Footer */
.footer {
    padding: 48px 0;
    background: var(--background);
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 16px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    transition: color 0.15s ease;
}

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

.footer p {
    color: var(--text-secondary);
    font-size: 12px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 48px;
        text-align: center;
    }
    
    .hero-title {
        font-size: 40px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .screenshot-container {
        max-width: 320px;
        margin: 0 auto;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .nav {
        gap: 20px;
    }
    
    .container {
        padding: 0 20px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 80px 0 60px;
    }
    
    .features {
        padding: 60px 0;
    }
    
    .beta-section {
        padding: 60px 0;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .section-title {
        font-size: 28px;
        margin-bottom: 48px;
    }
    
    .feature-card {
        padding: 24px;
    }
}