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

:root {
    --primary: #667eea;
    --primary-dark: #5568d3;
    --secondary: #764ba2;
    --success: #48bb78;
    --danger: #f56565;
    --warning: #ed8936;
    --info: #4299e1;
    --light: #f7fafc;
    --dark: #2d3748;
    --border: #e2e8f0;
    --shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--dark);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-attachment: fixed;
    min-height: 100vh;
    line-height: 1.6;
}

header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    padding: 1.5rem 0;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.site-nav {
    display: flex;
    gap: 2rem;
}

.site-nav a {
    color: var(--dark);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.site-nav a:hover,
.site-nav a:focus {
    color: var(--primary);
}

.site-nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: width 0.3s ease;
}

.site-nav a:hover::after {
    width: 100%;
}

.nav-toggle {
    color: var(--dark);
    border-color: var(--border);
}

main {
    max-width: 900px;
    margin: 3rem auto;
    padding: 0 2rem;
}

article {
    background: white;
    border-radius: 12px;
    padding: 3rem;
    box-shadow: var(--shadow);
    animation: slideUp 0.6s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.page-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--dark);
    font-weight: 700;
    line-height: 1.2;
}

.page-meta {
    color: #718096;
    font-size: 0.9rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.page-content {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--dark);
}

/* Markdown Styles */
.page-content h1,
.page-content h2,
.page-content h3,
.page-content h4,
.page-content h5,
.page-content h6 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-weight: 700;
    color: var(--dark);
    line-height: 1.2;
}

.page-content h1 {
    font-size: 2.2rem;
    color: var(--primary);
}

.page-content h2 {
    font-size: 1.8rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border);
}

.page-content h3 {
    font-size: 1.5rem;
}

.page-content p {
    margin-bottom: 1rem;
}

.page-content a {
    color: var(--primary);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}

.page-content a:hover {
    border-bottom-color: var(--primary);
}

.page-content ul,
.page-content ol {
    margin: 1rem 0;
    padding-left: 2rem;
}

.page-content li {
    margin-bottom: 0.5rem;
}

.page-content ul li::marker {
    color: var(--primary);
}

.page-content ol li::marker {
    color: var(--primary);
    font-weight: 700;
}

.page-content code {
    background: #f7fafc;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.2rem 0.4rem;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9em;
    color: #d63384;
}

.page-content pre {
    background: var(--dark);
    color: #f7fafc;
    padding: 1.5rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 1.5rem 0;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9rem;
}

.page-content pre code {
    background: none;
    border: none;
    padding: 0;
    color: #f7fafc;
}

.page-content blockquote {
    border-left: 4px solid var(--primary);
    padding-left: 1.5rem;
    margin: 1.5rem 0;
    color: #718096;
    font-style: italic;
}

.page-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 1.5rem 0;
    box-shadow: var(--shadow-sm);
}

.page-content table {
    width: 100%;
    border-collapse: collapse;
    /* margin: 1.5rem 0; */
    box-shadow: var(--shadow-sm);
    border-radius: 8px;
    overflow: hidden;
}

.page-content table th,
.page-content table td {
    /* padding: 1rem; */
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.page-content table th {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    font-weight: 600;
}

.page-content table tr:hover {
    background: var(--light);
}

.page-content hr {
    border: none;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
    margin: 1.5rem 0 1rem 0;
}

footer {
    text-align: center;
    padding: 2rem;
    color: rgba(255, 255, 255, 0.8);
    margin-top: 4rem;
}

footer p {
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .site-nav {
        flex-direction: column;
        gap: 0.5rem;
        font-size: 0.95rem;
    }

    main {
        margin: 2rem auto;
        padding: 0 1rem;
    }

    article {
        padding: 1.5rem;
    }

    .page-title {
        font-size: 1.8rem;
    }

    .page-content {
        font-size: 1rem;
    }

    .page-content h2 {
        font-size: 1.4rem;
    }

    .page-content table {
        font-size: 0.9rem;
    }

    .page-content table th,
    .page-content table td {
        padding: 0.75rem 0.5rem;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    body {
        background: linear-gradient(135deg, #2d3748 0%, #1a202c 100%);
    }

    header {
        background: rgba(45, 55, 72, 0.95);
        border-bottom-color: rgba(226, 232, 240, 0.1);
    }

    article {
        background: #2d3748;
        color: #e2e8f0;
    }

    .page-title,
    .page-content h1,
    .page-content h2,
    .page-content h3 {
        color: #e2e8f0;
    }

    .page-meta {
        color: #a0aec0;
        border-bottom-color: rgba(226, 232, 240, 0.1);
    }

    .page-content {
        color: #cbd5e0;
    }

    .page-content code {
        background: rgba(0, 0, 0, 0.3);
        border-color: rgba(226, 232, 240, 0.1);
        color: #f687b3;
    }

    .page-content blockquote {
        color: #a0aec0;
    }

    .page-content table th,
    .page-content table td {
        color: #cbd5e0;
        border-bottom-color: rgba(226, 232, 240, 0.1);
    }

    .page-content table tr:hover {
        background: rgba(255, 255, 255, 0.05);
    }

    .logo {
        color: #a0aec0;
    }

    .site-nav a {
        color: #e2e8f0;
    }

    .nav-toggle {
        color: #e2e8f0;
        border-color: rgba(226, 232, 240, 0.2);
    }
}