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

html {
    scroll-behavior: smooth;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #ffffff;
    color: #111827;
    line-height: 1.5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 1.5rem;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid #e5e7eb;
}

.logo-area h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    letter-spacing: -0.02em;
}

.breadcrumbs {
    font-size: 0.9rem;
    color: #6b7280;
}

.breadcrumbs a {
    color: inherit;
    text-decoration: none;
}

.breadcrumbs a:hover {
    text-decoration: underline;
}

.main-layout {
    display: flex;
    gap: 3rem;
    align-items: flex-start;
}

.content-area {
    flex: 1;
    min-width: 0;
}

.section {
    margin-bottom: 4rem;
}

.section-title {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: #111827;
    letter-spacing: -0.01em;
    scroll-margin-top: 3rem;
}

.metadata-box {
    border: 1px solid #e5e7eb;
    border-radius: 0.75rem;
    padding: 2.25rem;
    background-color: #ffffff;
    box-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.02);
}

.footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 6rem;
    padding-top: 2rem;
    border-top: 1px solid #e5e7eb;
    font-size: 0.8rem;
    color: #9ca3af;
}

.footer-logo {
    font-weight: 600;
}

.footer-copy {
    text-align: right;
}

.doc-content h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin: 2.25rem 0 1rem;
    color: #111827;
    scroll-margin-top: 3.5rem;
}

.doc-content h3:first-child {
    margin-top: 0;
}

.doc-content p {
    margin-bottom: 1.25rem;
    color: #374151;
    font-size: 0.975rem;
    line-height: 1.6;
}

.doc-content ul, .doc-content ol {
    margin-bottom: 1.75rem;
    padding-left: 1.5rem;
    color: #374151;
    font-size: 0.975rem;
}

.doc-content li {
    margin-bottom: 0.65rem;
    line-height: 1.5;
}

.doc-content code {
    background-color: #f3f4f6;
    padding: 0.2rem 0.45rem;
    border-radius: 0.375rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.85em;
    color: #1f2937;
}

.doc-content pre {
    background-color: #111827;
    color: #f8fafc;
    padding: 1.25rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    margin-bottom: 2rem;
    border: 1px solid #374151;
}

.doc-content pre code {
    background-color: transparent;
    padding: 0;
    color: inherit;
    font-size: 0.85em;
    border-radius: 0;
    line-height: 1.5;
}

.lang-switcher {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #9ca3af;
    font-size: 0.9rem;
}

.lang-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.95rem;
    color: #6b7280;
    font-weight: 500;
    transition: color 0.2s ease;
    padding: 0;
}

.lang-btn:hover {
    color: #374151;
}

.lang-btn.active {
    color: #111827;
    font-weight: 700;
}

.navigation-sidebar {
    width: 260px;
    position: sticky;
    top: 2.5rem;
    background-color: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 0.75rem;
    padding: 1.5rem;
}

.sidebar-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #6b7280;
    margin-bottom: 1rem;
}

.sidebar-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.sidebar-links a {
    font-size: 0.9rem;
    color: #4b5563;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.15s ease;
}

.sidebar-links a:hover {
    color: #111827;
    text-decoration: underline;
}

.sidebar-sublinks {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding-left: 1.25rem;
    margin-top: 0.5rem;
}

.sidebar-sublinks a {
    font-size: 0.825rem !important;
    color: #6b7280 !important;
    font-weight: 400 !important;
}

.sidebar-sublinks a:hover {
    color: #111827 !important;
}

.sub-section-doc {
    scroll-margin-top: 3.5rem;
}

.doc-divider {
    border: 0;
    border-top: 1px solid #e5e7eb;
    margin: 2.5rem 0;
}

.anim-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.anim-card {
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 0.75rem;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.anim-card:hover {
    border-color: #111827;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.05), 0 2px 4px -2px rgb(0 0 0 / 0.05);
}

.anim-card h4 {
    font-size: 1.05rem;
    font-weight: 600;
    color: #111827;
}

.anim-card p {
    font-size: 0.875rem;
    color: #4b5563;
    line-height: 1.45;
}

.anim-gif {
    background-color: #f9fafb;
    border-radius: 0.5rem;
    border: 1px solid #e5e7eb;
    overflow: hidden;
    aspect-ratio: 16/9;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 0.5rem;
}

.anim-gif img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.cmd-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
    font-size: 0.9rem;
}

.cmd-table th, .cmd-table td {
    padding: 0.85rem 1rem;
    text-align: left;
    border-bottom: 1px solid #e5e7eb;
    line-height: 1.45;
}

.cmd-table th {
    background-color: #f9fafb;
    font-weight: 600;
    color: #374151;
}

.cmd-table tr:hover {
    background-color: #fcfcfd;
}

.cmd-table code {
    background-color: #f3f4f6;
    padding: 0.15rem 0.4rem;
    border-radius: 0.25rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.85em;
    color: #1f2937;
}

@media (max-width: 900px) {
    .main-layout {
        flex-direction: column-reverse;
    }
    .navigation-sidebar {
        width: 100%;
        position: static;
        margin-bottom: 2rem;
    }
}