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

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --accent: #58a6ff;
    --accent-hover: #79c0ff;
    --border: #30363d;
    --code-green: #7ee787;
    --code-blue: #58a6ff;
    --code-purple: #bc8cff;
    --code-orange: #ffa657;
    --code-red: #f85149;
}

body {
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', 'Courier New', monospace;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 60px;
}

.logo {
    font-size: 24px;
    font-weight: 600;
    color: var(--accent);
}

.code-symbol {
    color: var(--code-green);
    margin-right: 8px;
}

.app-name {
    color: var(--accent);
}

.cursor-blink {
    animation: blink 1s infinite;
    color: var(--accent);
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

nav {
    display: flex;
    gap: 30px;
}

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
    font-size: 14px;
}

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

/* Hero Section */
.hero {
    text-align: center;
    padding: 80px 0 100px;
}

.hero-title {
    font-size: 48px;
    margin-bottom: 30px;
    line-height: 1.4;
}

.code-comment {
    color: var(--text-secondary);
    font-size: 20px;
    font-weight: normal;
}

.function-name {
    color: var(--code-blue);
}

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

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 50px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 40px;
}

.hero-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 999px;
    border: 1px solid var(--accent);
    color: var(--accent);
    text-decoration: none;
    font-size: 14px;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.1s ease;
}

.hero-button:hover {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent-hover);
    transform: translateY(-1px);
}

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

.hero-demo {
    margin-top: 60px;
}

.demo-panel {
    display: inline-block;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 30px 40px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.demo-label {
    color: var(--text-secondary);
    font-size: 12px;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.demo-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 15px;
}

.demo-item {
    width: 50px;
    height: 50px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    transition: all 0.3s;
}

.demo-item.active {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
    transform: scale(1.1);
    box-shadow: 0 0 20px rgba(88, 166, 255, 0.5);
}

/* Section */
section {
    margin-bottom: 100px;
}

.section-title {
    font-size: 32px;
    margin-bottom: 40px;
    color: var(--accent);
}

/* Features */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 30px;
    transition: all 0.3s;
}

.feature-card:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(88, 166, 255, 0.1);
}

.feature-card.highlight {
    border-color: var(--code-green);
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(126, 231, 135, 0.05) 100%);
}

.feature-icon {
    font-size: 32px;
    margin-bottom: 15px;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--accent);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

/* How it works */
.workflow {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}

.workflow-step {
    flex: 1;
    min-width: 200px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 30px;
    text-align: center;
}

.step-number {
    font-size: 48px;
    color: var(--code-green);
    font-weight: 600;
    margin-bottom: 15px;
    opacity: 0.3;
}

.step-content h3 {
    color: var(--accent);
    margin-bottom: 10px;
    font-size: 18px;
}

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

.workflow-arrow {
    font-size: 32px;
    color: var(--code-green);
    font-weight: 600;
}

kbd {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 4px 8px;
    font-family: inherit;
    font-size: 12px;
    color: var(--accent);
}

/* Advantage */
.advantage-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 40px;
}

.advantage-item {
    display: flex;
    align-items: center;
    padding: 15px 0;
    font-size: 16px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border);
}

.advantage-item:last-child {
    border-bottom: none;
}

.advantage-item .code-symbol {
    margin-right: 15px;
    color: var(--code-green);
    font-size: 18px;
}

/* Code Example */
.code-block {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 30px;
    font-family: 'SF Mono', 'Monaco', monospace;
    overflow-x: auto;
}

.code-line {
    margin-bottom: 12px;
    font-size: 14px;
    line-height: 1.8;
}

.code-comment {
    color: var(--text-secondary);
}

.code-keyword {
    color: var(--code-purple);
    margin-right: 8px;
}

.code-string {
    color: var(--code-orange);
}

/* Footer */
footer {
    border-top: 1px solid var(--border);
    padding: 40px 0;
    margin-top: 100px;
    text-align: center;
}

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

.footer-meta {
    margin-top: 10px;
    font-size: 12px;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .demo-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-meta {
        text-align: center;
    }
    
    .workflow {
        flex-direction: column;
    }
    
    .workflow-arrow {
        transform: rotate(90deg);
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    nav {
        gap: 15px;
    }
    
    nav a {
        font-size: 12px;
    }
}