/* ==========================================================================
   Eric Holland — site styles
   Clean clinical / academic: off-white ground, navy + teal accents,
   serif headings (Source Serif 4), Inter body.
   ========================================================================== */

:root {
    --artery: #b3312b;
    --bg: #f7f6f2;
    --bg-elev: #ffffff;
    --bg-soft: #eef1f4;
    --ink: #1c2530;
    --ink-2: #4a5665;
    --ink-3: #7b8794;
    --line: #dde3e9;
    --navy: #12365c;
    --navy-2: #1e4d80;
    --teal: #0f7c85;
    --teal-soft: #d9eff0;
    --amber: #b7791f;
    --amber-soft: #fbefd6;
    --red: #b5382f;
    --red-soft: #f8dfdc;
    --green: #2f7d4f;
    --green-soft: #dcefe2;
    --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
    --sans: Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    --mono: ui-monospace, "Cascadia Code", Consolas, monospace;
    --radius: 10px;
    --shadow: 0 1px 2px rgba(20, 30, 40, .06), 0 6px 20px -8px rgba(20, 30, 40, .12);
    --maxw: 1100px;

    /* diagram tokens */
    --map-fill: #e9eef3;
    --map-stroke: #b8c4d0;
    --map-hover: #cfe3e5;
    --node-root: #e3eaf2;
    --node-trunk: #d9eff0;
    --node-division: #f2f2f2;
    --node-cord: #fbefd6;
    --node-branch: #ffffff;
    --pill-navy-bg: #e3eaf2;
    --row-hover: #fafbfc;
    --code-bg: #182230;
    --code-ink: #e6edf3;

    color-scheme: light dark;
}

/* ---------- Dark mode (follows the OS / browser preference) ---------- */
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #12171d;
        --bg-elev: #1a2129;
        --artery: #e0564d;
        --bg-soft: #232c36;
        --ink: #e6ebf0;
        --ink-2: #b4bfca;
        --ink-3: #7f8b98;
        --line: #2c3742;
        --navy: #9dbbe0;
        --navy-2: #b9d0ec;
        --teal: #4fc0c9;
        --teal-soft: #163a3f;
        --amber: #e0a94a;
        --amber-soft: #3a2d14;
        --red: #f08a80;
        --red-soft: #3f1f1c;
        --green: #7fce9c;
        --green-soft: #17331f;
        --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px -10px rgba(0, 0, 0, .6);

        --map-fill: #2a3440;
        --map-stroke: #4a5866;
        --map-hover: #2f4a4e;
        --node-root: #2b3a4d;
        --node-trunk: #1f3d41;
        --node-division: #2a313a;
        --node-cord: #3d3320;
        --node-branch: #1f2730;
        --pill-navy-bg: #2b3a4d;
        --row-hover: #1f272f;
        --code-bg: #0d1218;
        --code-ink: #dfe6ee;
    }
    .brand-mark { background: #1e4d80; }
    .site-nav a.nav-accent.active, .btn { color: #0f1418; }
    .btn.secondary { color: var(--navy); }
    .btn:hover { color: #0f1418; }
    .mode-tabs button.active { color: #0f1418; }
    .region.correct { fill: #2f7d4f; }
    .region.wrong { fill: #b5382f; }
    .region.hl-2 { fill: #b7791f; }
    svg .px-node.correct { fill: #2f7d4f; }
    svg .px-node.wrong { fill: #b5382f; }
    svg .px-node.hl, svg .region.hl { fill: var(--teal); stroke: var(--navy-2); }
    svg .px-node.hl-soft { fill: var(--teal-soft); stroke: var(--teal); }
    svg .px-node.side.correct { fill: #2f7d4f; }
    svg .px-node.side.wrong { fill: #b5382f; }
    svg .px-node.side.hl { fill: var(--teal); stroke: var(--navy-2); }
    .prose img, .about-photo img { filter: brightness(.92); }
}

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

html { scroll-behavior: smooth; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: var(--sans);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
    font-family: var(--serif);
    color: var(--navy);
    line-height: 1.2;
    margin: 0 0 .5rem;
    font-weight: 600;
    letter-spacing: -.005em;
}
h1 { font-size: clamp(2rem, 4vw, 2.75rem); }
/* Blazor moves focus to the h1 after navigation (for screen readers); don't draw a focus box for it */
h1:focus, h1:focus-visible { outline: none; }
h2 { font-size: clamp(1.4rem, 2.6vw, 1.8rem); margin-top: 2rem; }
h3 { font-size: 1.2rem; margin-top: 1.5rem; }

p { margin: 0 0 1rem; }
a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }
a.muted { color: var(--ink-3); }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 1.25rem; }
html, body { overflow-x: hidden; max-width: 100%; }
@media (max-width: 600px) {
    .container { padding: 0 1rem; }
    .site-main { padding: 1.5rem 0 3rem; }
    .page-hero { margin-bottom: 1.25rem; }
    .lede { font-size: 1.05rem; }
    .question { font-size: 1.15rem; }
    .options { grid-template-columns: 1fr !important; }
    .card { padding: 1rem 1.1rem; }
    .scorebar { gap: .5rem .9rem; }
    .brand-sub { display: none; }
}

/* ---------- Header / nav ---------- */
.site { min-height: 100vh; display: flex; flex-direction: column; }
.site-header {
    background: var(--bg-elev);
    border-bottom: 1px solid var(--line);
    position: sticky; top: 0; z-index: 50;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; height: 68px; position: relative; }
.brand { display: flex; align-items: center; gap: .75rem; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand-mark {
    width: 40px; height: 40px; border-radius: 9px;
    background: var(--navy); color: #fff;
    display: grid; place-items: center;
    font-family: var(--serif); font-weight: 700; letter-spacing: .02em;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-family: var(--serif); font-weight: 600; font-size: 1.1rem; color: var(--navy); }
.brand-sub { font-size: .72rem; color: var(--ink-3); text-transform: uppercase; letter-spacing: .08em; }

.site-nav { display: flex; gap: .25rem; align-items: center; }
.site-nav a {
    padding: .5rem .85rem; border-radius: 999px;
    color: var(--ink-2); font-weight: 500; font-size: .95rem;
}
.site-nav a:hover { background: var(--bg-soft); text-decoration: none; color: var(--navy); }
.site-nav a.active { background: var(--teal-soft); color: var(--teal); }
.site-nav a.nav-accent { border: 1px solid var(--teal); color: var(--teal); }
.site-nav a.nav-accent.active { background: var(--teal); color: #fff; }
.site-nav a.nav-admin { color: var(--amber); }

.nav-toggle { display: none; background: none; border: 0; padding: .5rem; cursor: pointer; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--navy); margin: 5px 0; }

@media (max-width: 760px) {
    .nav-toggle { display: block; }
    .site-nav {
        display: none; position: absolute; right: 1.25rem; top: 64px;
        flex-direction: column; align-items: stretch;
        background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius);
        box-shadow: var(--shadow); padding: .5rem; min-width: 200px;
    }
    .site-nav.open { display: flex; }
    .site-nav a { border-radius: 8px; }
}

/* ---------- Main / footer ---------- */
.site-main { flex: 1; padding: 2.5rem 0 4rem; }
.site-footer { border-top: 1px solid var(--line); padding: 1.25rem 0; color: var(--ink-3); font-size: .875rem; background: var(--bg-elev); }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: .5rem 1rem; }
.live-visitors { display: inline-flex; align-items: center; gap: .35rem; white-space: nowrap; }
.live-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 0 var(--green); animation: live-pulse 2.4s ease-out infinite; }
@keyframes live-pulse { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--green) 55%, transparent); } 70% { box-shadow: 0 0 0 7px transparent; } 100% { box-shadow: 0 0 0 0 transparent; } }
@media (prefers-reduced-motion: reduce) { .live-dot { animation: none; } }
.footer-links a { margin-left: 1rem; color: var(--ink-2); }

/* ---------- Generic blocks ---------- */
.eyebrow { text-transform: uppercase; letter-spacing: .12em; font-size: .75rem; font-weight: 600; color: var(--teal); margin-bottom: .5rem; }
.lede { font-size: 1.15rem; color: var(--ink-2); max-width: 62ch; }
.page-hero { padding-bottom: 1.5rem; border-bottom: 1px solid var(--line); margin-bottom: 2rem; }

.card {
    background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius);
    padding: 1.25rem 1.4rem; box-shadow: var(--shadow);
}
.card h3 { margin-top: 0; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1rem; }
.card-link { display: block; color: inherit; transition: transform .12s ease, box-shadow .12s ease; }
.card-link:hover { text-decoration: none; transform: translateY(-2px); box-shadow: 0 10px 28px -10px rgba(18, 54, 92, .25); }
.card-link .arrow { color: var(--teal); font-weight: 600; }

.pill { display: inline-block; padding: .15rem .6rem; border-radius: 999px; font-size: .75rem; font-weight: 600; background: var(--bg-soft); color: var(--ink-2); }
.pill.teal { background: var(--teal-soft); color: var(--teal); }
.pill.amber { background: var(--amber-soft); color: var(--amber); }
.pill.navy { background: var(--pill-navy-bg); color: var(--navy); }
.pill.green { background: var(--green-soft); color: var(--green); }
.pill.red { background: var(--red-soft); color: var(--red); }

.btn {
    display: inline-flex; align-items: center; gap: .4rem;
    padding: .55rem 1.1rem; border-radius: 8px; border: 1px solid var(--navy);
    background: var(--navy); color: #fff; font-weight: 600; font-size: .95rem;
    cursor: pointer; text-decoration: none; font-family: var(--sans);
    transition: background .12s ease;
}
.btn:hover { background: var(--navy-2); text-decoration: none; }
.btn.secondary { background: transparent; color: var(--navy); }
.btn.secondary:hover { background: var(--bg-soft); }
.btn.teal { background: var(--teal); border-color: var(--teal); }
.btn.danger { background: var(--red); border-color: var(--red); }
.btn.small { padding: .35rem .75rem; font-size: .85rem; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.muted { color: var(--ink-3); }
.small { font-size: .875rem; }
.stack > * + * { margin-top: 1rem; }
.row { display: flex; gap: .75rem; flex-wrap: wrap; align-items: center; }
.spread { justify-content: space-between; }

hr { border: 0; border-top: 1px solid var(--line); margin: 2rem 0; }

/* ---------- Timeline (About page) ---------- */
.timeline { list-style: none; padding: 0; margin: 1.5rem 0; border-left: 2px solid var(--line); }
.timeline li { position: relative; padding: 0 0 1.5rem 1.5rem; }
.timeline li::before {
    content: ""; position: absolute; left: -7px; top: .45rem;
    width: 12px; height: 12px; border-radius: 50%; background: var(--teal); border: 2px solid var(--bg);
}
.timeline .when { font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; color: var(--ink-3); font-weight: 600; }
.timeline .what { font-family: var(--serif); font-size: 1.1rem; color: var(--navy); font-weight: 600; }

.two-col { display: grid; grid-template-columns: 1.4fr 1fr; gap: 2.5rem; align-items: start; }
@media (max-width: 860px) { .two-col { grid-template-columns: 1fr; } }

/* ---------- About page photos ---------- */
.hero-split { display: grid; grid-template-columns: 1.5fr 1fr; gap: 2.5rem; align-items: center; }
@media (max-width: 860px) { .hero-split { grid-template-columns: 1fr; } .hero-split .about-photo { max-width: 360px; } }
.about-photo { margin: 0; }
.about-photo img { display: block; width: 100%; height: auto; border-radius: 14px; box-shadow: var(--shadow); }
.about-photo figcaption { font-size: .8rem; color: var(--ink-3); margin-top: .5rem; }
.photo-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: .75rem; margin: 1.5rem 0 .5rem; }
.photo-strip img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; border-radius: 10px; display: block; box-shadow: var(--shadow); }
@media (max-width: 600px) { .photo-strip { grid-template-columns: 1fr; } .photo-strip img { aspect-ratio: 16 / 9; } }
.timeline .thumb { width: 56px; height: 56px; object-fit: cover; border-radius: 8px; float: right; margin-left: .75rem; }

/* ---------- Blog ---------- */
.post-list { list-style: none; padding: 0; margin: 0; }
.post-list li { padding: 1.25rem 0; border-bottom: 1px solid var(--line); }
.post-list h3 { margin: .25rem 0; }
.post-meta { font-size: .85rem; color: var(--ink-3); display: flex; gap: .75rem; flex-wrap: wrap; align-items: center; }

.prose { max-width: 72ch; }
.prose h2, .prose h3 { margin-top: 2rem; }
.prose img { max-width: 100%; border-radius: var(--radius); }
.prose blockquote { margin: 1.5rem 0; padding: .5rem 1.25rem; border-left: 3px solid var(--teal); background: var(--bg-elev); color: var(--ink-2); }
.prose code { font-family: var(--mono); font-size: .9em; background: var(--bg-soft); padding: .1em .35em; border-radius: 4px; }
.prose pre { background: var(--code-bg); color: var(--code-ink); padding: 1rem 1.25rem; border-radius: var(--radius); overflow-x: auto; }
.prose pre code { background: none; padding: 0; color: inherit; }
.prose table { border-collapse: collapse; width: 100%; margin: 1.25rem 0; font-size: .95rem; }
.prose th, .prose td { border: 1px solid var(--line); padding: .5rem .75rem; text-align: left; }
.prose th { background: var(--bg-soft); }
.prose details { border: 1px solid var(--line); border-radius: var(--radius); padding: .75rem 1rem; margin: 1rem 0; background: var(--bg-elev); }
.prose summary { cursor: pointer; font-weight: 600; color: var(--navy); }

/* ---------- Forms (admin) ---------- */
.form-grid { display: grid; gap: 1rem; }
label.field { display: grid; gap: .35rem; font-weight: 600; font-size: .9rem; color: var(--ink-2); }
input[type=text], input[type=password], input[type=url], input[type=number], textarea, select {
    width: 100%; padding: .6rem .75rem; border: 1px solid var(--line); border-radius: 8px;
    font: inherit; color: var(--ink); background: var(--bg-elev);
}
input:focus, textarea:focus, select:focus { outline: 2px solid var(--teal); outline-offset: 1px; border-color: var(--teal); }
textarea.editor { font-family: var(--mono); font-size: .9rem; min-height: 420px; line-height: 1.5; }
.editor-split { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 900px) { .editor-split { grid-template-columns: 1fr; } }
.preview { border: 1px dashed var(--line); border-radius: var(--radius); padding: 1rem 1.25rem; background: var(--bg-elev); min-height: 420px; overflow: auto; }
.alert { padding: .75rem 1rem; border-radius: 8px; font-size: .95rem; }
.alert.error { background: var(--red-soft); color: var(--red); }
.alert.ok { background: var(--green-soft); color: var(--green); }
.alert.info { background: var(--teal-soft); color: var(--teal); }

table.admin { width: 100%; border-collapse: collapse; font-size: .92rem; }
table.admin th, table.admin td { padding: .55rem .6rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; }
table.admin th { color: var(--ink-3); font-weight: 600; font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; }

.checkbox { display: inline-flex; align-items: center; gap: .5rem; font-weight: 500; }

/* ---------- Resources ---------- */
.resource { display: flex; gap: 1rem; align-items: flex-start; }
.resource .icon {
    flex: 0 0 44px; height: 44px; border-radius: 8px; background: var(--bg-soft);
    display: grid; place-items: center; font-family: var(--mono); font-size: .7rem; font-weight: 700; color: var(--navy);
    text-transform: uppercase;
}

/* ---------- Learn / games ---------- */
.learn-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.25rem; }
.learn-card .level { font-size: .75rem; color: var(--ink-3); text-transform: uppercase; letter-spacing: .08em; font-weight: 600; }

.game { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 2rem; align-items: start; min-width: 0; }
.game.wide-figure { grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); }
.game.extra-wide-figure { grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); }
.game.single { grid-template-columns: minmax(0, 1fr); }
.game > * { min-width: 0; }
@media (max-width: 900px) {
    .game, .game.wide-figure, .game.extra-wide-figure { grid-template-columns: minmax(0, 1fr); gap: 1.25rem; }
    .game-panel { position: static; }
}

.game-panel { position: sticky; top: 90px; }
.game-figure { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); padding: .75rem; box-shadow: var(--shadow); }
.game-figure { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.game-figure svg { width: 100%; height: auto; max-height: 86vh; display: block; margin: 0 auto; }
/* Wide flow diagrams keep a legible minimum width and scroll sideways inside their card on small screens */
.game-figure .flow-diagram { min-width: 720px; }
/* vertical pathways: never squash to the panel height — the panel scrolls instead */
.game-figure svg.flow-diagram.vertical { max-height: none; min-width: 0; }
.px-arrowhead { fill: var(--ink-3); }
.px-arrowhead.hl { fill: var(--teal); }
/* Flow pages get the full window width so the tree has room */
.site-main .container:has(.flow-page) { max-width: min(1600px, 100%); }
.flow-page .game-figure { max-height: 80vh; overflow: auto; }
@media (max-width: 900px) { .game-figure svg { max-height: 70vh; } }

.scorebar { display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; margin-bottom: 1rem; }
.scorebar .stat { font-variant-numeric: tabular-nums; font-weight: 600; color: var(--navy); }
.scorebar .stat span { color: var(--ink-3); font-weight: 500; margin-right: .3rem; }
.progress { flex: 1; min-width: 120px; height: 8px; background: var(--bg-soft); border-radius: 999px; overflow: hidden; }
.progress > div { height: 100%; background: var(--teal); transition: width .25s ease; }

.question { font-family: var(--serif); font-size: 1.35rem; color: var(--navy); margin: 0 0 1rem; }
.question .hl { color: var(--teal); }

.options { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: .6rem; }
.option {
    text-align: left; padding: .7rem .9rem; border-radius: 8px; border: 1px solid var(--line);
    background: var(--bg-elev); color: var(--ink); font: inherit; font-weight: 500; cursor: pointer;
    transition: border-color .1s ease, background .1s ease;
}
.option:hover:not(:disabled) { border-color: var(--teal); background: var(--teal-soft); }
.option:disabled { cursor: default; }
.option.correct { background: var(--green-soft); border-color: var(--green); color: var(--green); }
.option.wrong { background: var(--red-soft); border-color: var(--red); color: var(--red); }
.option.missed { outline: 2px dashed var(--green); }
.option.selected { border-color: var(--navy); box-shadow: inset 0 0 0 1px var(--navy); }

.feedback { margin-top: 1rem; padding: 1rem 1.25rem; border-radius: var(--radius); background: var(--bg-elev); border: 1px solid var(--line); }
.feedback.correct { border-color: var(--green); background: var(--green-soft); }
.feedback.wrong { border-color: var(--red); background: var(--red-soft); }
.feedback h4 { margin: 0 0 .35rem; font-family: var(--sans); font-size: 1rem; }
.feedback p { margin: 0; }
.feedback .explain { margin-top: .5rem; color: var(--ink-2); font-size: .95rem; }

.filters { display: flex; gap: .75rem; flex-wrap: wrap; align-items: center; margin-bottom: 1rem; }
.filters .label { font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; color: var(--ink-3); font-weight: 600; }
.mode-tabs.compact button { padding: .3rem .7rem; font-size: .85rem; }
.mode-tabs { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; padding: 3px; background: var(--bg-elev); margin-bottom: 1.25rem; }
@media (max-width: 760px) {
    .mode-tabs { max-width: 100%; overflow-x: auto; flex-wrap: nowrap; scrollbar-width: none; }
    .mode-tabs::-webkit-scrollbar { display: none; }
    .mode-tabs button { white-space: nowrap; flex: 0 0 auto; }
    .filters { gap: .5rem; }
    .filters .label { flex-basis: 100%; }
}
.mode-tabs button { border: 0; background: none; padding: .4rem .9rem; border-radius: 999px; font: inherit; font-weight: 500; color: var(--ink-2); cursor: pointer; }
.mode-tabs button.active { background: var(--navy); color: #fff; }

.summary { text-align: center; padding: 2rem; }
.summary .big { font-family: var(--serif); font-size: 3rem; color: var(--navy); font-weight: 700; line-height: 1; }

/* Body-map SVG regions */
.region { fill: var(--map-fill); stroke: var(--map-stroke); stroke-width: 1; cursor: pointer; transition: fill .12s ease; }
.region:hover { fill: var(--map-hover); }
/* Per-level tints for the reference map */
.region.lv-c2 { fill: #c7d5e6; }
.region.lv-c3 { fill: #b8cbe0; }
.region.lv-c4 { fill: #a9c1da; }
.region.lv-c5 { fill: #f6cfa8; }
.region.lv-c6 { fill: #f3b98a; }
.region.lv-c7 { fill: #f0a26a; }
.region.lv-c8 { fill: #e98d4c; }
.region.lv-t1 { fill: #dccb9f; }
.region.lv-t2 { fill: #e9e0c8; }
.region.lv-t3 { fill: #dbe8d0; }
.region.lv-t4 { fill: #c9dfbf; }
.region.lv-t5 { fill: #dbe8d0; }
.region.lv-t6 { fill: #c9dfbf; }
.region.lv-t7 { fill: #dbe8d0; }
.region.lv-t8 { fill: #c9dfbf; }
.region.lv-t9 { fill: #dbe8d0; }
.region.lv-t10 { fill: #c9dfbf; }
.region.lv-t11 { fill: #dbe8d0; }
.region.lv-t12 { fill: #c9dfbf; }
.region.lv-l1 { fill: #f2d9df; }
.region.lv-l2 { fill: #eac4d0; }
.region.lv-l3 { fill: #e2afc1; }
.region.lv-l4 { fill: #d99ab2; }
.region.lv-l5 { fill: #cf85a3; }
.region.lv-s1 { fill: #b9a3d6; }
.region.lv-s2 { fill: #a68cca; }
.region.lv-s3-s5 { fill: #9375bd; }
@media (prefers-color-scheme: dark) {
    .region.lv-c2 { fill: #33475e; }
    .region.lv-c3 { fill: #2e4460; }
    .region.lv-c4 { fill: #2a4262; }
    .region.lv-c5 { fill: #6b4a2e; }
    .region.lv-c6 { fill: #7a5230; }
    .region.lv-c7 { fill: #875a32; }
    .region.lv-c8 { fill: #946034; }
    .region.lv-t1 { fill: #5c5636; }
    .region.lv-t2 { fill: #4a4736; }
    .region.lv-t3 { fill: #37483a; }
    .region.lv-t4 { fill: #3d5240; }
    .region.lv-t5 { fill: #37483a; }
    .region.lv-t6 { fill: #3d5240; }
    .region.lv-t7 { fill: #37483a; }
    .region.lv-t8 { fill: #3d5240; }
    .region.lv-t9 { fill: #37483a; }
    .region.lv-t10 { fill: #3d5240; }
    .region.lv-t11 { fill: #37483a; }
    .region.lv-t12 { fill: #3d5240; }
    .region.lv-l1 { fill: #4d3340; }
    .region.lv-l2 { fill: #563547; }
    .region.lv-l3 { fill: #5f374e; }
    .region.lv-l4 { fill: #683a55; }
    .region.lv-l5 { fill: #713c5c; }
    .region.lv-s1 { fill: #4a3d6a; }
    .region.lv-s2 { fill: #544375; }
    .region.lv-s3-s5 { fill: #5e4a80; }
}

.region:hover { filter: brightness(.9); }
.region.hl { fill: var(--teal); stroke: var(--navy); }
.region.hl-2 { fill: #f0c46a; stroke: var(--amber); }
.region.correct { fill: #7fc79a; stroke: var(--green); }
.region.wrong { fill: #e79c96; stroke: var(--red); }
.region.dim { opacity: .35; }
.region-label { font-family: var(--sans); font-size: 9px; fill: var(--ink-2); pointer-events: none; }
.body-base { fill: var(--map-fill); stroke: none; }
.body-outline { fill: none; stroke: var(--ink-3); stroke-width: 1.1; pointer-events: none; }
.region { stroke: var(--bg-elev); }

/* Brachial plexus diagram */
.px-node { fill: var(--node-branch); stroke: var(--navy); stroke-width: 1.4; }
.px-node.root { fill: var(--node-root); }
.px-node.trunk { fill: var(--node-trunk); }
.px-node.division { fill: var(--node-division); }
.px-node.cord { fill: var(--node-cord); }
.px-node.branch { fill: var(--node-branch); }
.px-node.flow { fill: var(--node-branch); }
.px-node.hl { fill: var(--teal); stroke: var(--navy); stroke-width: 2.5; }
.px-node.correct { fill: #7fc79a; }
.px-node.wrong { fill: #e79c96; }
.px-node.dim { opacity: .3; }
.px-edge { stroke: var(--ink-3); stroke-width: 1.6; fill: none; }
.px-edge.hl { stroke: var(--teal); stroke-width: 3; }
.px-edge.dim { opacity: .25; }
.px-label { font-family: var(--sans); font-size: 10px; fill: var(--ink); pointer-events: none; }
.px-label.small { font-size: 8.5px; fill: var(--ink-2); }
.px-hit { cursor: pointer; }
.px-node.hl-soft { fill: var(--teal-soft); stroke: var(--teal); }
.flow-diagram { width: 100%; height: auto; }
/* Histology */
.histo-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: .75rem; }
.histo-thumb { display: flex; flex-direction: column; gap: .35rem; padding: .4rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-elev); cursor: pointer; text-align: left; font: inherit; color: var(--ink); }
.histo-thumb img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: 6px; }
.histo-thumb span { font-size: .8rem; line-height: 1.2; color: var(--ink-2); }
.histo-thumb:hover { border-color: var(--teal); }
.histo-figure { display: flex; justify-content: center; align-items: center; }
.histo-figure img { max-width: 100%; max-height: 72vh; border-radius: 6px; }

/* Artery map (anatomical drawing) */
.artery-map { height: auto; display: block; }
.game-figure.map-figure { display: flex; justify-content: center; overflow: auto; }
.am-bone { fill: none; stroke: var(--ink-3); stroke-width: 2; opacity: .55; }
.am-vessel { fill: none; stroke: var(--artery); stroke-linecap: round; stroke-linejoin: round; transition: stroke .15s; }
.am-vessel.posterior { stroke-dasharray: 5 4; }
.am-vessel.hl { stroke: var(--teal); stroke-width: 7px !important; stroke-dasharray: none; }
.am-vessel.hl-soft { stroke: var(--teal); opacity: .55; }
.am-vessel.correct { stroke: var(--green); stroke-width: 7px !important; stroke-dasharray: none; }
.am-vessel.wrong { stroke: var(--red); stroke-width: 7px !important; stroke-dasharray: none; }
.am-vessel.dim { opacity: .25; }
.am-hitarea { fill: none; stroke: transparent; stroke-width: 14px; }
.am-hit { cursor: pointer; }
.am-hit:hover .am-vessel:not(.hl):not(.correct):not(.wrong) { stroke: var(--navy); }
.px-enzyme { font-family: var(--sans); font-size: 8.5px; font-style: italic; fill: var(--ink-2); pointer-events: none; paint-order: stroke; stroke: var(--bg-elev); stroke-width: 3px; stroke-linejoin: round; }
.px-enzyme.hl { fill: var(--teal); font-weight: 600; font-style: normal; }
.px-enzyme.dim { opacity: .25; }
.hl-text { color: var(--teal); }

/* Metabolism cases */
.case-box { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); padding: .9rem 1.1rem; }
.case-box p { margin: 0 0 .6rem; }
.compact-table td { padding: .25rem .5rem; font-size: .85rem; }
.mechanism { margin: .5rem 0 0; padding-left: 1.4rem; }
.mechanism li { margin: .35rem 0; padding: .4rem .6rem; border-radius: 8px; border: 1px solid transparent; cursor: pointer; }
.mechanism li.active { background: var(--teal-soft); border-color: var(--teal); }
.mechanism li.done { color: var(--ink-2); }
.mechanism li.todo { color: var(--ink-3); }

/* SVG text colour helpers (declared after .region-label/.px-label so they win) */
.svg-heading { fill: var(--navy); font-weight: 600; }
.svg-muted { fill: var(--ink-3); }
.svg-red { fill: var(--red); }

.legend { display: flex; gap: 1rem; flex-wrap: wrap; font-size: .8rem; color: var(--ink-2); margin-top: .5rem; }
.legend span::before { content: ""; display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: .35rem; vertical-align: -1px; border: 1px solid var(--navy); }
.legend .root::before { background: var(--node-root); }
.legend .trunk::before { background: var(--node-trunk); }
.legend .division::before { background: var(--node-division); }
.legend .cord::before { background: var(--node-cord); }
.legend .branch::before { background: var(--node-branch); }
.legend .side::before { background: var(--bg-elev); border-style: dashed; }
.px-node.side { fill: var(--bg-elev); stroke: var(--ink-3); stroke-width: 1.1; stroke-dasharray: 3 2; }
.px-node.division { stroke-width: 1; opacity: .8; }
.px-edge.side { stroke-width: 1.1; stroke-dasharray: 3 2; }
.px-edge.side.hl { stroke-width: 2.2; stroke-dasharray: none; }
.px-node.side.hl { fill: var(--teal); stroke: var(--navy); stroke-dasharray: none; stroke-width: 2.5; }
.px-node.side.correct { fill: #7fc79a; stroke-dasharray: none; }
.px-node.side.wrong { fill: #e79c96; stroke-dasharray: none; }
.px-node.side.hl-soft { fill: var(--teal-soft); stroke: var(--teal); }

/* Reference tables */
.ref-table { width: 100%; border-collapse: collapse; font-size: .92rem; background: var(--bg-elev); }
.ref-table th, .ref-table td { border: 1px solid var(--line); padding: .5rem .7rem; text-align: left; vertical-align: top; }
.ref-table th { background: var(--bg-soft); color: var(--navy); }
.ref-table tr:hover td { background: var(--row-hover); }

/* Blazor error UI */
#blazor-error-ui {
    background: var(--amber-soft); color: var(--ink); border-top: 2px solid var(--amber);
    bottom: 0; box-shadow: 0 -2px 10px rgba(0,0,0,.1); display: none; left: 0; padding: .6rem 1.25rem; position: fixed; width: 100%; z-index: 1000;
}
#blazor-error-ui .dismiss { cursor: pointer; position: absolute; right: .75rem; top: .5rem; }

/* row deep-linked from another module */
.ref-table tr.hl-row td { background: var(--teal-soft); }
.pill.teal a, a.pill { text-decoration: none; }

/* viscerosomatic spine column */
.spine-seg { fill: var(--bg-elev); stroke: var(--line); stroke-width: 1; }
.spine-seg.hl { fill: var(--teal); stroke: var(--navy-2); }
.spine-seg.soft { fill: var(--teal-soft); stroke: var(--teal); }
.spine-seg.picked { fill: var(--navy); stroke: var(--navy-2); }
.spine-seg.correct { fill: #2f7d4f; }
.spine-seg.missed { fill: var(--green-soft); stroke: #2f7d4f; stroke-dasharray: 3 2; stroke-width: 1.6; }
.spine-seg.wrong { fill: #b5382f; }
.spine-label { font-size: 9.5px; fill: var(--ink); pointer-events: none; }
.spine-seg.hl + text, .spine-seg.picked + text, .spine-seg.correct + text, .spine-seg.wrong + text { fill: #fff; }
.spine-region { font-size: 8.5px; fill: var(--ink-3); text-transform: uppercase; letter-spacing: .06em; }
.spine-column .px-hit { cursor: pointer; }