:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-code: #f5f5f5;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --accent: #007bff;
    --accent-hover: #0056b3;
    --border: #dee2e6;
    --shadow: rgba(0, 0, 0, 0.1);
    --success: #28a745;
    --warning: #ffc107;
}

[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-code: #252525;
    --text-primary: #e9ecef;
    --text-secondary: #adb5bd;
    --accent: #4dabf7;
    --accent-hover: #74c0fc;
    --border: #495057;
    --shadow: rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background 0.3s, color 0.3s;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

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

.nav-brand h1 {
    font-size: 1.5rem;
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

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

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

.theme-toggle {
    background: none;
    border: 2px solid var(--border);
    border-radius: 8px;
    padding: 0.5rem 1rem;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.3s;
}

.theme-toggle:hover {
    border-color: var(--accent);
    transform: scale(1.1);
}

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
    color: white;
    padding: 5rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero .subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

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

/* Features */
.features {
    padding: 4rem 0;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px var(--shadow);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
    color: var(--accent);
}

/* Quick Start */
.quick-start {
    padding: 4rem 0;
    text-align: center;
}

.quick-start h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

.code-example {
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    margin: 2rem 0;
    text-align: left;
    overflow-x: auto;
}

.code-example pre {
    margin: 0;
}

.code-example code {
    font-family: 'Monaco', 'Menlo', 'Courier New', monospace;
    font-size: 0.95rem;
    color: var(--text-primary);
}

/* Status */
.status {
    padding: 4rem 0;
}

.status h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.status-grid {
    display: grid;
    gap: 1.5rem;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border);
}

.status-badge {
    font-size: 2rem;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-weight: bold;
}

.status-badge.completed {
    background: var(--success);
    color: white;
}

.status-badge.planned {
    background: var(--bg-code);
    color: var(--text-secondary);
    border: 2px dashed var(--border);
}

.status-item h4 {
    margin-bottom: 0.5rem;
}

.status-item p {
    color: var(--text-secondary);
}

/* Footer */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 2rem 0;
    text-align: center;
    color: var(--text-secondary);
    margin-top: 4rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero .subtitle {
        font-size: 1.2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
}