/* ===== Settex docs — theme ===== */
:root {
    --bg: #faf9f7;
    --surface: #ffffff;
    --surface-2: #f1efea;
    --border: #e4e1da;
    --text: #201f1c;
    --muted: #6c675f;
    --accent: #b5462b;
    --accent-2: #c9603f;
    --accent-soft: #f6e5dd;
    --code-bg: #f6f4f0;
    --code-text: #2b2a26;
    --tok-kw: #a83232;
    --tok-str: #3f7d3f;
    --tok-num: #8a5a1a;
    --tok-comment: #8a857b;
    --tok-bool: #7a3fa8;
    --tok-interp: #1f6b6b;
    --sidebar-w: 264px;
    --topbar-h: 56px;
    --maxw: 860px;
    --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #17160f;
        --surface: #201e18;
        --surface-2: #29271f;
        --border: #34312a;
        --text: #ecebe4;
        --muted: #a49f94;
        --accent: #e0714f;
        --accent-2: #e88a6c;
        --accent-soft: #35231b;
        --code-bg: #1c1b15;
        --code-text: #e4e2d8;
        --tok-kw: #e0714f;
        --tok-str: #86c186;
        --tok-num: #d6a860;
        --tok-comment: #948e82;
        --tok-bool: #c19be6;
        --tok-interp: #74caca;
    }
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    font-family: var(--sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.65;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

h1:focus, h2:focus { outline: none; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
    font-family: var(--mono);
    font-size: 0.86em;
    background: var(--surface-2);
    color: var(--code-text);
    padding: 0.12em 0.4em;
    border-radius: 5px;
    word-break: break-word;
}

kbd {
    font-family: var(--mono);
    font-size: 0.78em;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-bottom-width: 2px;
    border-radius: 5px;
    padding: 0.05em 0.4em;
}

/* ===== Loading ===== */
.app-loading {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    color: var(--muted);
}
.app-loading-mark { display: block; width: 84px; height: 84px; border-radius: 20px; }

/* ===== Layout ===== */
.layout { min-height: 100vh; }

.topbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--topbar-h);
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 0 18px;
    background: color-mix(in srgb, var(--surface) 88%, transparent);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    z-index: 40;
}
.brand { display: flex; align-items: center; gap: 9px; color: var(--text); font-weight: 700; letter-spacing: -0.01em; }
.brand:hover { text-decoration: none; }
.brand-mark { display: block; width: 28px; height: 28px; border-radius: 7px; }
.brand-name { font-size: 1.1rem; }
.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 14px; }
.topbar-gh { color: var(--muted); font-size: 0.9rem; }

.lang-switch {
    display: inline-flex;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    background: var(--surface);
}
.lang-btn {
    font: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 4px 10px;
    border: none;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    line-height: 1.4;
}
.lang-btn:hover { color: var(--text); }
.lang-btn.active { background: var(--accent-soft); color: var(--accent); }
.lang-btn + .lang-btn { border-left: 1px solid var(--border); }

.sidebar {
    position: fixed;
    top: var(--topbar-h); left: 0; bottom: 0;
    width: var(--sidebar-w);
    overflow-y: auto;
    border-right: 1px solid var(--border);
    background: var(--surface);
    padding: 22px 14px 40px;
}

.content {
    margin-left: var(--sidebar-w);
    padding: calc(var(--topbar-h) + 28px) 40px 60px;
    max-width: calc(var(--maxw) + var(--sidebar-w) + 80px);
}
.content > article { max-width: var(--maxw); }

/* ===== Nav ===== */
.nav-toggle, .nav-burger { display: none; }
.nav-menu { display: flex; flex-direction: column; gap: 2px; }
.nav-section {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
    font-weight: 700;
    margin: 18px 10px 6px;
}
.nav-section:first-child { margin-top: 0; }
.nav-item {
    display: block;
    padding: 7px 12px;
    border-radius: 8px;
    color: var(--text);
    font-size: 0.94rem;
}
.nav-item:hover { background: var(--surface-2); text-decoration: none; }
.nav-item.active {
    background: var(--accent-soft);
    color: var(--accent);
    font-weight: 600;
}

/* ===== Typography ===== */
h1 { font-size: 2.3rem; line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 14px; }
h2 {
    font-size: 1.5rem; letter-spacing: -0.01em;
    margin: 44px 0 12px; padding-top: 8px;
    scroll-margin-top: calc(var(--topbar-h) + 16px);
}
h3 { font-size: 1.15rem; margin: 26px 0 8px; }
p { margin: 12px 0; }
.lead { font-size: 1.15rem; color: var(--muted); margin-bottom: 8px; }
ul, ol { padding-left: 22px; }
li { margin: 6px 0; }
ul.two-col { columns: 2; column-gap: 32px; }
@media (max-width: 640px) { ul.two-col { columns: 1; } }

/* ===== Code blocks ===== */
.codeblock { margin: 16px 0; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; background: var(--code-bg); }
.codeblock-title {
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--muted);
    padding: 8px 14px;
    background: var(--surface-2);
    border-bottom: 1px solid var(--border);
}
pre.code {
    margin: 0;
    padding: 16px 18px;
    overflow-x: auto;
    font-family: var(--mono);
    font-size: 0.86rem;
    line-height: 1.6;
    color: var(--code-text);
    tab-size: 2;
}
pre.code code { background: none; padding: 0; color: inherit; font-size: 1em; }

/* Settex syntax highlighting (see SettexHighlighter) */
.tok-kw { color: var(--tok-kw); font-weight: 600; }
.tok-str { color: var(--tok-str); }
.tok-num { color: var(--tok-num); }
.tok-comment { color: var(--tok-comment); font-style: italic; }
.tok-bool { color: var(--tok-bool); }
.tok-interp { color: var(--tok-interp); }

/* ===== Hero ===== */
.hero {
    padding: 20px 0 30px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 8px;
}
.hero-kicker {
    font-family: var(--mono);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 12px;
}
.hero h1 { font-size: 2.7rem; max-width: 16ch; }
.hero-sub { font-size: 1.2rem; color: var(--muted); max-width: 62ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }

.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    border: 1px solid transparent;
    cursor: pointer;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-2); color: #fff; }
.btn-ghost { background: var(--surface); border-color: var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ===== Split (two code blocks) ===== */
.split { display: grid; gap: 16px; margin: 24px 0; }
@media (min-width: 840px) { .split { grid-template-columns: 1fr 1fr; align-items: start; } }

/* ===== Feature grid ===== */
.feature-grid { display: grid; gap: 16px; margin: 16px 0; }
@media (min-width: 620px) { .feature-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 980px) { .feature-grid { grid-template-columns: 1fr 1fr 1fr; } }
.feature { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 18px; }
.feature-icon { font-size: 1.6rem; margin-bottom: 6px; }
.feature h3 { margin: 4px 0 6px; font-size: 1.05rem; }
.feature p { margin: 0; color: var(--muted); font-size: 0.92rem; }

/* ===== Steps ===== */
ol.steps { counter-reset: step; list-style: none; padding-left: 0; }
ol.steps li { position: relative; padding: 4px 0 4px 42px; margin: 10px 0; }
ol.steps li::before {
    counter-increment: step; content: counter(step);
    position: absolute; left: 0; top: 2px;
    width: 28px; height: 28px; border-radius: 50%;
    background: var(--accent-soft); color: var(--accent);
    font-weight: 700; font-size: 0.9rem;
    display: flex; align-items: center; justify-content: center;
}

/* ===== Callouts ===== */
.callout {
    border-left: 3px solid var(--accent);
    background: var(--surface);
    border-radius: 0 10px 10px 0;
    padding: 12px 16px;
    margin: 18px 0;
    font-size: 0.95rem;
}
.callout-warn { border-left-color: #c9962a; }
.callout-note { border-left-color: var(--accent); }

/* ===== On-page TOC ===== */
.onpage-toc {
    display: flex; flex-wrap: wrap; gap: 8px 14px;
    align-items: center;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: 12px; padding: 12px 16px; margin: 18px 0 8px;
    font-size: 0.88rem;
}
.onpage-toc span { font-weight: 700; color: var(--muted); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; }

/* ===== Next cards ===== */
.next-cards { display: grid; gap: 14px; margin: 16px 0; }
@media (min-width: 620px) { .next-cards { grid-template-columns: 1fr 1fr; } }
.next-card { display: block; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 18px; color: var(--text); }
.next-card:hover { border-color: var(--accent); text-decoration: none; }
.next-card h3 { margin: 0 0 6px; color: var(--accent); }
.next-card p { margin: 0; color: var(--muted); font-size: 0.92rem; }

/* ===== Extensions ===== */
.ext-grid { display: grid; gap: 16px; margin: 16px 0; }
@media (min-width: 720px) { .ext-grid { grid-template-columns: 1fr 1fr; } }
.ext-card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 20px; }
.ext-card h2 { margin-top: 0; }
.ext-note { color: var(--muted); font-size: 0.9rem; }
ul.check { list-style: none; padding-left: 0; }
ul.check li { padding-left: 26px; position: relative; }
ul.check li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

/* ===== Tables ===== */
.ref-table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 0.94rem; display: block; overflow-x: auto; }
.ref-table th, .ref-table td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
.ref-table th { font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
.ref-table tbody tr:last-child td { border-bottom: none; }

/* ===== Footer ===== */
.doc-footer {
    margin-top: 56px; padding-top: 22px;
    border-top: 1px solid var(--border);
    color: var(--muted); font-size: 0.85rem;
    display: flex; flex-wrap: wrap; gap: 6px 20px; justify-content: space-between;
    max-width: var(--maxw);
}

/* ===== Responsive nav ===== */
@media (max-width: 860px) {
    .nav-burger {
        display: flex; flex-direction: column; gap: 4px;
        cursor: pointer; padding: 6px; margin-right: 4px;
    }
    .nav-burger span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; }
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.2s ease;
        z-index: 45;
        box-shadow: 4px 0 24px rgba(0,0,0,0.12);
    }
    .nav-toggle:checked ~ .sidebar { transform: translateX(0); }
    .content { margin-left: 0; padding: calc(var(--topbar-h) + 20px) 20px 50px; }
    .hero h1 { font-size: 2.1rem; }
}

/* ===== Blazor error UI ===== */
#blazor-error-ui {
    color-scheme: light only;
    background: lightyellow; color: #333;
    bottom: 0; left: 0; width: 100%;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
    box-sizing: border-box; display: none;
    padding: 0.6rem 1.25rem 0.7rem; position: fixed; z-index: 1000;
}
#blazor-error-ui .dismiss { cursor: pointer; position: absolute; right: 0.75rem; top: 0.5rem; }
.blazor-error-boundary { background: #b32121; padding: 1rem; color: white; }
.blazor-error-boundary::after { content: "An error has occurred."; }