:root {
    --api-bg: #f4f6f9;
    --api-surface: #ffffff;
    --api-border: #e2e8f0;
    --api-text: #1e293b;
    --api-muted: #64748b;
    --api-accent: #007bff;
    --api-accent-hover: #0056b3;
    --api-accent-soft: #e8f2ff;
    --api-radius: 12px;
    --api-shadow: 0 1px 3px rgba(15, 23, 42, 0.06), 0 4px 16px rgba(15, 23, 42, 0.04);
    --api-font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    --api-mono: ui-monospace, "Cascadia Code", "SF Mono", Consolas, monospace;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body.api-landing {
    margin: 0;
    font-family: var(--api-font);
    font-size: 16px;
    line-height: 1.55;
    color: var(--api-text);
    background: var(--api-bg);
    -webkit-font-smoothing: antialiased;
}

.api-page {
    max-width: 1080px;
    margin: 0 auto;
    padding: 1.25rem 1.25rem 3rem;
}

.api-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.5rem 0 1.5rem;
}

.api-back {
    font-size: 0.9rem;
    color: var(--api-muted);
    text-decoration: none;
}

.api-back:hover {
    color: var(--api-accent);
}

.api-lang {
    display: flex;
    gap: 0.25rem;
    background: var(--api-surface);
    border: 1px solid var(--api-border);
    border-radius: 8px;
    padding: 3px;
}

.api-lang-btn {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--api-muted);
    text-decoration: none;
    border-radius: 6px;
    transition: background 0.15s, color 0.15s;
}

.api-lang-btn:hover {
    color: var(--api-text);
    background: var(--api-bg);
}

.api-lang-btn.is-active {
    color: var(--api-accent);
    background: var(--api-accent-soft);
    cursor: default;
}

.api-lang-btn.is-active:hover {
    background: var(--api-accent-soft);
}

.api-hero {
    background: linear-gradient(135deg, #ffffff 0%, #f0f6ff 100%);
    border: 1px solid var(--api-border);
    border-radius: calc(var(--api-radius) + 4px);
    padding: 2.5rem 2rem;
    box-shadow: var(--api-shadow);
    margin-bottom: 2rem;
}

.api-hero h1 {
    margin: 0 0 0.35em;
    font-size: clamp(1.75rem, 4vw, 2.35rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.api-hero-sub {
    margin: 0 0 0.75em;
    font-size: 1.1rem;
    color: var(--api-accent);
    font-weight: 500;
}

.api-hero-desc {
    margin: 0 0 1.75em;
    max-width: 36em;
    color: var(--api-muted);
    font-size: 1.05rem;
}

.api-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.api-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.65rem 1.25rem;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    border: 1px solid transparent;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.api-btn:focus-visible {
    outline: 2px solid var(--api-accent);
    outline-offset: 2px;
}

.api-btn-primary {
    background: var(--api-accent);
    color: #fff;
}

.api-btn-primary:hover {
    background: var(--api-accent-hover);
    color: #fff;
}

.api-btn-secondary {
    background: var(--api-surface);
    color: var(--api-accent);
    border-color: var(--api-border);
}

.api-btn-secondary:hover {
    border-color: var(--api-accent);
    background: var(--api-accent-soft);
}

.api-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.api-chip {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--api-muted);
    background: var(--api-surface);
    border: 1px solid var(--api-border);
    padding: 0.35rem 0.7rem;
    border-radius: 999px;
}

.api-section-title {
    margin: 0 0 1.25rem;
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--api-text);
}

.api-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.api-feature-card {
    background: var(--api-surface);
    border: 1px solid var(--api-border);
    border-radius: var(--api-radius);
    padding: 1.25rem 1.35rem;
    box-shadow: var(--api-shadow);
    transition: border-color 0.15s, box-shadow 0.15s;
}

.api-feature-card:hover {
    border-color: #cbd5e1;
    box-shadow: 0 4px 20px rgba(15, 23, 42, 0.07);
}

.api-feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    margin-bottom: 0.75rem;
    font-size: 1rem;
    background: var(--api-accent-soft);
    color: var(--api-accent);
    border-radius: 8px;
}

.api-feature-card h3 {
    margin: 0 0 0.4em;
    font-size: 1rem;
    font-weight: 600;
}

.api-feature-card p {
    margin: 0;
    font-size: 0.88rem;
    color: var(--api-muted);
    line-height: 1.5;
}

.api-panel {
    background: var(--api-surface);
    border: 1px solid var(--api-border);
    border-radius: var(--api-radius);
    padding: 1.5rem 1.75rem;
    box-shadow: var(--api-shadow);
    margin-bottom: 2rem;
}

.api-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.25rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.api-step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.75rem;
    height: 1.75rem;
    margin-bottom: 0.65rem;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--api-accent);
    background: var(--api-accent-soft);
    border-radius: 50%;
}

.api-step h3 {
    margin: 0 0 0.35em;
    font-size: 0.95rem;
    font-weight: 600;
}

.api-step p {
    margin: 0;
    font-size: 0.88rem;
    color: var(--api-muted);
}

.api-quick-list {
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0;
}

.api-quick-list dt {
    margin: 0;
    padding: 0.65rem 0 0.15rem;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--api-text);
    border-top: 1px solid var(--api-border);
}

.api-quick-list dt:first-of-type {
    border-top: none;
    padding-top: 0;
}

.api-quick-list dd {
    margin: 0 0 0.65rem;
    padding: 0 0 0.65rem;
    font-size: 0.9rem;
    color: var(--api-muted);
    border-bottom: 1px solid var(--api-border);
}

.api-quick-list dd:last-of-type {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.api-pill {
    display: inline-block;
    font-family: var(--api-mono);
    font-size: 0.8rem;
    background: #f1f5f9;
    border: 1px solid var(--api-border);
    padding: 0.15rem 0.5rem;
    border-radius: 6px;
    color: var(--api-text);
}

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

.api-resource-card {
    display: block;
    text-decoration: none;
    color: inherit;
    background: var(--api-surface);
    border: 1px solid var(--api-border);
    border-radius: var(--api-radius);
    padding: 1.15rem 1.25rem;
    box-shadow: var(--api-shadow);
    transition: border-color 0.15s, box-shadow 0.15s;
}

.api-resource-card:hover {
    border-color: var(--api-accent);
    box-shadow: 0 4px 20px rgba(0, 123, 255, 0.1);
}

.api-resource-card:focus-visible {
    outline: 2px solid var(--api-accent);
    outline-offset: 2px;
}

.api-resource-card h3 {
    margin: 0 0 0.35em;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--api-accent);
}

.api-resource-card p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--api-muted);
}

.api-resource-card .api-pill {
    margin-top: 0.65rem;
}

.api-footer {
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--api-border);
    text-align: center;
    font-size: 0.72rem;
    color: #94a3b8;
    line-height: 1.7;
}

.api-footer a {
    color: #94a3b8;
    text-decoration: none;
}

.api-footer a:hover {
    color: var(--api-muted);
    text-decoration: underline;
}

.api-footer-sep {
    margin: 0 0.4em;
    color: #cbd5e1;
}

@media (max-width: 600px) {
    .api-hero {
        padding: 1.75rem 1.25rem;
    }

    .api-header {
        flex-wrap: wrap;
    }
}