:root {
    --bg: #0b0f17;
    --card: rgba(255, 255, 255, 0.06);
    --border: rgba(255, 255, 255, 0.10);
    --text: rgba(255, 255, 255, 0.92);
    --muted: rgba(255, 255, 255, 0.65);
    --shadow: 0 16px 50px rgba(0, 0, 0, 0.35);
    --radius: 18px;
}

@media (prefers-color-scheme: light) {
    :root {
        --bg: #f6f8fa;
        --card: rgba(255, 255, 255, 0.9);
        --border: rgba(0, 0, 0, 0.08);
        --text: rgba(0, 0, 0, 0.86);
        --muted: rgba(0, 0, 0, 0.6);
        --shadow: 0 16px 50px rgba(0, 0, 0, 0.10);
    }
}

body {
    margin: 0;
    font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
    background: var(--bg);
    color: var(--text);
}

.shell {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 18px;
    padding: 18px;
    max-width: 1280px;
    margin: 0 auto;
    box-sizing: border-box;
}

@media (max-width: 980px) {
    .shell {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static !important;
    }
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(10px);
}

.brand {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.brand strong {
    font-size: 14px;
    letter-spacing: 0.2px;
}

.brand span {
    font-size: 12px;
    color: var(--muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 520px;
}

.actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.btn {
    appearance: none;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.06);
    color: var(--text);
    border-radius: 999px;
    padding: 8px 12px;
    font-size: 12px;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

@media (prefers-color-scheme: light) {
    .btn {
        background: rgba(0, 0, 0, 0.04);
    }
}

.btn:hover {
    filter: brightness(1.06);
}

.sidebar {
    position: sticky;
    top: 18px;
    height: calc(100vh - 36px);
    display: flex;
    flex-direction: column;
}

.sidebar .inner {
    padding: 12px;
    overflow: auto;
    height: 100%;
}

.search {
    width: 100%;
    box-sizing: border-box;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.06);
    color: var(--text);
    outline: none;
    font-size: 13px;
    margin-bottom: 12px;
}

@media (prefers-color-scheme: light) {
    .search {
        background: rgba(0, 0, 0, 0.03);
    }
}

.toc a {
    display: block;
    padding: 8px 10px;
    border-radius: 12px;
    color: var(--text);
    text-decoration: none;
    font-size: 13px;
    line-height: 1.25;
    opacity: 0.92;
    border: 1px solid transparent;
}

.toc a:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--border);
}

@media (prefers-color-scheme: light) {
    .toc a:hover {
        background: rgba(0, 0, 0, 0.03);
    }
}

.toc a small {
    color: var(--muted);
    display: block;
    font-size: 11px;
    margin-top: 2px;
}

.content {
    padding: 16px;
}

/* GitHub markdown container */
.markdown-body {
    background: transparent;
    color: inherit;
    padding: 18px 20px;
}

.loading,
.error {
    padding: 18px 20px;
    color: var(--muted);
    font-size: 13px;
}

/* code blocks feel nicer inside cards */
pre {
    border-radius: 14px !important;
    border: 1px solid var(--border);
    overflow: auto;
}

.footer {
    padding: 12px 16px;
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--muted);
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
}

.pill {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 11px;
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--muted);
    background: rgba(255, 255, 255, 0.06);
}

@media (prefers-color-scheme: light) {
    .pill {
        background: rgba(0, 0, 0, 0.03);
    }
}