:root {
    --primary: #0066cc;
    --primary-dark: #0052a3;
    --secondary: #6c757d;
    --success: #28a745;
    --danger: #dc3545;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-dark: #1a1a1a;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --border: #dee2e6;
    --code-bg: #f8f9fa;
    --shadow: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.1);
}

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

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

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

/* Header */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 3rem 0;
    box-shadow: var(--shadow-lg);
}

.header-content {
    margin-bottom: 2rem;
}

header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    font-size: 3rem;
}

.tagline {
    font-size: 1.25rem;
    opacity: 0.95;
}

.header-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: white;
    color: #667eea;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.btn-secondary {
    background: rgba(255,255,255,0.2);
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: #667eea;
}

/* Hero Section */
.hero {
    padding: 4rem 0;
    background: var(--bg-secondary);
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-align: center;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    text-align: center;
    max-width: 800px;
    margin: 0 auto 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
}

.feature:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

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

.feature h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

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

/* Sections */
section {
    padding: 4rem 0;
}

section:nth-child(even) {
    background: var(--bg-secondary);
}

section h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

section p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* Code Blocks */
.code-block {
    position: relative;
    background: var(--bg-dark);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 2rem 0;
    overflow-x: auto;
    box-shadow: var(--shadow);
}

.code-block pre {
    margin: 0;
}

.code-block code {
    font-family: 'Fira Code', 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    color: #f8f8f2;
}

.copy-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem 1rem;
    background: rgba(255,255,255,0.1);
    color: white;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

.copy-btn:hover {
    background: rgba(255,255,255,0.2);
}

/* Options Grid */
.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.option {
    padding: 1.5rem;
    background: white;
    border-radius: 8px;
    border-left: 4px solid var(--primary);
    box-shadow: var(--shadow);
}

.option h4 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    color: var(--primary);
}

.option code {
    background: var(--code-bg);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
}

.option p {
    color: var(--text-secondary);
    font-size: 1rem;
    margin: 0;
}

/* Info Box */
.info-box {
    background: #e7f3ff;
    border-left: 4px solid var(--primary);
    padding: 1.5rem;
    margin: 2rem 0;
    border-radius: 4px;
}

.info-box h4 {
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.info-box p {
    color: var(--text-primary);
    margin: 0;
}

/* API Reference */
.api-section {
    margin-bottom: 3rem;
}

.api-section h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.methods-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
}

.method {
    padding: 1rem;
    background: white;
    border-radius: 6px;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.method:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow);
}

.method code {
    display: block;
    font-family: 'Fira Code', monospace;
    color: var(--primary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.method p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.stat {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.stat-value {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-top: 0.5rem;
}

/* Footer */
footer {
    background: var(--bg-dark);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.footer-section p {
    color: rgba(255,255,255,0.7);
    font-size: 0.9rem;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: white;
}

.license {
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 2rem;
    text-align: center;
    color: rgba(255,255,255,0.6);
}

/* Responsive */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .hero h2 {
        font-size: 1.75rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    section {
        padding: 2rem 0;
    }

    .code-block {
        padding: 1rem;
    }

    .copy-btn {
        position: static;
        display: block;
        margin-top: 1rem;
        width: 100%;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature,
.option,
.method,
.stat {
    animation: fadeIn 0.5s ease-out;
}

/* Inline code */
:not(pre) > code {
    background: var(--code-bg);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: 'Fira Code', monospace;
    font-size: 0.9em;
    color: #e83e8c;
}