/* ==========================================================================
   Minecraft Biome Picker — Voxel World (kids · Minecraft cluster)
   Fourth page on voxel-world-engine.js. An isometric plot of voxel chunks
   generates, a beacon hunts the surface, the winning chunk rises on a pillar
   and the plot TERRAFORMS to that biome — then the biome's OWN weather plays
   (sand blows, snow falls, the deep dark closes in). 14 biomes, 14 effects.
   Page chrome is theme-aware (var(--theme-*)); the voxel scene stays fixed —
   it is a physical place, not a themed surface.
   ⚖️ All artwork is original generic voxel/craft symbolism. No Minecraft
   textures, mob designs or trademarked assets anywhere in this page.
   ========================================================================== */
.page-minecraft-biome-picker {
    --mbi-primary: #16a34a;
    --mbi-accent: #fde047;
    --mbi-grad: linear-gradient(135deg, #4ade80, #15803d);
    --mbi-ink: var(--theme-text, #1f2430);
    /* ⚠️ --theme-muted, NOT --theme-text-muted: the latter is not defined
       anywhere in themes.css, so it silently fell back to the literal on every
       theme and this copy never adapted. */
    --mbi-muted: var(--theme-muted, #6b7280);
    --mbi-surface: var(--theme-surface, #ffffff);
    --mbi-border: var(--theme-border, #e5e7eb);
}

/* ---- Ambient backdrop --------------------------------------------------- */
.page-minecraft-biome-picker::before {
    content: ""; position: fixed; inset: 0; z-index: -2; pointer-events: none;
    background:
        radial-gradient(1100px 560px at 6% -6%, rgba(22, 163, 74, 0.16), transparent 60%),
        radial-gradient(950px 520px at 96% 2%, rgba(14, 165, 233, 0.12), transparent 62%),
        radial-gradient(880px 640px at 50% 108%, rgba(30, 41, 59, 0.10), transparent 60%);
}

/* ---- Stage + scene ------------------------------------------------------ */
.page-minecraft-biome-picker .mbi-stage { position: relative; max-width: 580px; margin: 0 auto; }
.page-minecraft-biome-picker .mbi-stage-wrap { position: relative; }
.page-minecraft-biome-picker #mbiStage { display: block; }
.page-minecraft-biome-picker .mbi-svg {
    width: 100%; height: auto; display: block; max-height: 72vh; border-radius: 16px;
    filter: drop-shadow(0 14px 34px rgba(15, 23, 42, .45));
}

/* ---- Chunks -------------------------------------------------------------
   NOTE: .mbi-chunk is positioned by an SVG transform ATTRIBUTE from JS, and
   .mbi-chunk-anim is driven by a transform attribute during GEN/RAISE. All
   CSS keyframes therefore target .mbi-chunk-anim ONLY while it is idle —
   never .mbi-chunk — because a CSS transform replaces the attribute outright
   and throws the element to the SVG origin. */
.page-minecraft-biome-picker .mbi-chunk { transition: opacity .3s ease; }
.page-minecraft-biome-picker .mbi-chunk.is-dim { opacity: .28; }
.page-minecraft-biome-picker .mbi-chunk.is-target .mbi-cube { filter: drop-shadow(0 0 12px rgba(253, 224, 71, .85)); }
.page-minecraft-biome-picker .mbi-face-t,
.page-minecraft-biome-picker .mbi-face-l,
.page-minecraft-biome-picker .mbi-face-r { stroke: rgba(9, 14, 26, .45); stroke-width: 1.2; transition: fill .25s linear; }
.page-minecraft-biome-picker .mbi-shadow { fill: rgba(8, 12, 22, .34); }
.page-minecraft-biome-picker .mbi-chunk-e { text-anchor: middle; dominant-baseline: central; }
/* ⚠️ THE KEYFRAMES LIVE ON .mbi-chunk-jolt, NOT .mbi-chunk-anim.
   .mbi-chunk-anim carries the transform ATTRIBUTE that the engine writes for
   GEN and RAISE. A CSS animation on that same element OWNS the transform
   property and silently beats the attribute — the winner's lift computed
   correctly (attr -74.4) while the rendered transform stayed identity, so the
   block never visibly rose. Same trap lineup/comic avoid with an inner wrapper. */
.page-minecraft-biome-picker .mbi-chunk-jolt.is-jolt { animation: mbiJolt .38s ease-in-out 1; }
@keyframes mbiJolt { 0%, 100% { transform: translateY(0); } 45% { transform: translateY(-7px); } }
.page-minecraft-biome-picker .mbi-chunk-jolt.is-bob { animation: mbiBob 1.5s ease-in-out 1; }
@keyframes mbiBob { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-4px); } }

.page-minecraft-biome-picker .mbi-void { opacity: .55; }
.page-minecraft-biome-picker .mbi-pillar { pointer-events: none; transform-box: fill-box; transform-origin: center bottom; }

/* ---- The seeking beacon ------------------------------------------------- */
.page-minecraft-biome-picker .mbi-beacon {
    pointer-events: none; transition: opacity .16s ease;
    filter: drop-shadow(0 0 10px rgba(253, 224, 71, .95));
}
.page-minecraft-biome-picker .mbi-beacon-d { fill: #fde047; opacity: .9; }
.page-minecraft-biome-picker .mbi-beacon-i { fill: #fffbeb; }

/* ---- Achievement toast (this page's reveal) ----------------------------- */
.page-minecraft-biome-picker .mbi-toast { pointer-events: none; }
.page-minecraft-biome-picker .mbi-toast-bg {
    fill: #1c2333; stroke: #16a34a; stroke-width: 2;
}
.page-minecraft-biome-picker .mbi-toast-k {
    fill: #fde047; font-weight: 800; font-size: 13px; letter-spacing: .04em;
    font-family: var(--bs-body-font-family, sans-serif);
}
.page-minecraft-biome-picker .mbi-toast-t {
    fill: #f8fafc; font-weight: 800;
    font-family: var(--bs-body-font-family, sans-serif);
}

@media (prefers-reduced-motion: reduce) {
    .page-minecraft-biome-picker .mbi-chunk-jolt.is-jolt,
    .page-minecraft-biome-picker .mbi-chunk-jolt.is-bob { animation: none; }
}

/* ---- Reveal effect particles -------------------------------------------- */
.page-minecraft-biome-picker .mbi-fx { pointer-events: none; }
.page-minecraft-biome-picker .mbi-fx-puff    { fill: #e2e8f0; }
.page-minecraft-biome-picker .mbi-fx-part    { fill: #a3a3a3; }
.page-minecraft-biome-picker .mbi-fx-glint   { fill: #fef9c3; }
.page-minecraft-biome-picker .mbi-fx-weather { fill: #bae6fd; }
.page-minecraft-biome-picker .mbi-fx-spark   { fill: #fde047; }

/* ---- Per-biome weather (engine picks the layer from item.effect) --------- */
.page-minecraft-biome-picker .mbi-fx-leaf   { fill: #4ade80; }
.page-minecraft-biome-picker .mbi-fx-sand   { fill: #fcd34d; }
.page-minecraft-biome-picker .mbi-fx-bubble { stroke: #bae6fd; }
.page-minecraft-biome-picker .mbi-fx-wind   { stroke: #e2e8f0; stroke-linecap: round; }
.page-minecraft-biome-picker .mbi-fx-rain   { fill: #7dd3fc; color: #7dd3fc; }
.page-minecraft-biome-picker .mbi-fx-snow   { fill: #f8fafc; color: #f8fafc; }
.page-minecraft-biome-picker .mbi-fx-mist   { fill: #cbd5e1; }
.page-minecraft-biome-picker .mbi-fx-dust   { fill: #d6c08a; }
.page-minecraft-biome-picker .mbi-fx-petal  { fill: #f9a8d4; }
.page-minecraft-biome-picker .mbi-fx-spore  { fill: #fecaca; }
.page-minecraft-biome-picker .mbi-fx-strata { fill: #c2410c; }
.page-minecraft-biome-picker .mbi-fx-dark   { fill: #020617; }
.page-minecraft-biome-picker .mbi-fx-sculk  { stroke: #22d3ee; color: #22d3ee; }
.page-minecraft-biome-picker .mbi-fx-glow   { fill: #fbbf24; }
.page-minecraft-biome-picker .mbi-fx-shard  { fill: #e0f2fe; stroke: #0f172a; stroke-width: 2; }

/* ---- Start overlay ------------------------------------------------------ */
.page-minecraft-biome-picker .mbi-start-overlay {
    position: absolute; left: 50%; top: 50%; z-index: 3;
    display: inline-flex; align-items: center; gap: .5rem; border: 0; border-radius: 8px;
    padding: .8rem 1.9rem; font-size: 1.05rem; font-weight: 800; letter-spacing: .05em; text-transform: uppercase;
    color: #fff; background: var(--mbi-grad); cursor: pointer; box-shadow: 0 12px 30px -8px rgba(21, 128, 61, .9);
    animation: mbiStartPulse 1.8s ease-in-out infinite;
}
.page-minecraft-biome-picker .mbi-start-overlay:hover { filter: brightness(1.1); }
.page-minecraft-biome-picker .mbi-start-overlay[hidden] { display: none; }
@keyframes mbiStartPulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-50%, -50%) scale(1.05); }
}

/* ---- Winner result bar (shared layout — identity only here) ------------- */
.page-minecraft-biome-picker .wsp-result {
    --wsp-result-accent: var(--mbi-primary);
    --wsp-result-grad: var(--mbi-grad);
    --wsp-result-btn-ink: #ffffff;
    --wsp-result-plate: #e7f0da;
    --wsp-result-tint: rgba(22, 163, 74, .08);
}

.page-minecraft-biome-picker .mbi-count { text-align: center; font-size: .9rem; color: var(--mbi-muted); margin: .7rem 0 .25rem; }
.page-minecraft-biome-picker .mbi-count.is-warn { color: var(--mbi-primary); font-weight: 700; }
.page-minecraft-biome-picker .mbi-effects { display: flex; gap: 1.2rem; justify-content: center; margin-top: .5rem; }
.page-minecraft-biome-picker .mbi-effects label { font-size: .85rem; color: var(--mbi-muted); display: inline-flex; align-items: center; gap: .35rem; }

/* ---- Speed slider ------------------------------------------------------- */
.page-minecraft-biome-picker .mbi-speed { margin: .9rem auto .2rem; max-width: 420px; }
.page-minecraft-biome-picker .mbi-speed > label {
    display: flex; align-items: center; gap: .35rem; font-size: .85rem; font-weight: 600;
    color: var(--mbi-muted); margin-bottom: .4rem;
}
.page-minecraft-biome-picker .mbi-speed-val { margin-left: auto; font-weight: 800; color: var(--mbi-primary); font-variant-numeric: tabular-nums; }
.page-minecraft-biome-picker .mbi-range {
    -webkit-appearance: none; appearance: none; width: 100%; height: 6px; border-radius: 999px;
    background: rgba(120, 120, 120, .25); outline: none; cursor: pointer;
}
.page-minecraft-biome-picker .mbi-range::-webkit-slider-thumb {
    -webkit-appearance: none; appearance: none; width: 18px; height: 18px; border-radius: 4px;
    background: var(--mbi-grad); border: 2px solid #fff; box-shadow: 0 2px 6px -1px rgba(21, 128, 61, .7);
}
.page-minecraft-biome-picker .mbi-range::-moz-range-thumb {
    width: 18px; height: 18px; border-radius: 4px; background: #4d7c0f; border: 2px solid #fff;
}
.page-minecraft-biome-picker .mbi-range-ends {
    display: flex; justify-content: space-between; font-size: .72rem; color: var(--mbi-muted);
    opacity: .75; margin-top: .25rem;
}

/* ---- Winner reveal ------------------------------------------------------ */
.page-minecraft-biome-picker .mbi-modal-img { width: 148px; height: 148px; display: inline-block; }
.mbi-modal-img { width: 148px; height: 148px; display: inline-block; }
.mbi-modal-emoji { font-size: 72px; line-height: 1; }

/* ---- Challenge chooser grid (settings) ---------------------------------- */
.page-minecraft-biome-picker .mbi-item-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(104px, 1fr)); gap: .5rem; }
.page-minecraft-biome-picker .mbi-chip {
    --chip-c: #4d7c0f; position: relative;
    border: 2px solid var(--mbi-border); background: var(--mbi-surface); border-radius: 8px; padding: .5rem .2rem .35rem;
    cursor: pointer; text-align: center; transition: transform .1s ease, border-color .1s ease, box-shadow .1s ease; opacity: .5;
}
.page-minecraft-biome-picker .mbi-chip-e { display: block; font-size: 24px; line-height: 1; margin-bottom: .15rem; }
.page-minecraft-biome-picker .mbi-chip img { width: 58px; height: 58px; display: block; margin: 0 auto .2rem; object-fit: contain; }
.page-minecraft-biome-picker .mbi-chip-t { font-size: .66rem; font-weight: 700; color: var(--mbi-ink); display: block; line-height: 1.1; }
.page-minecraft-biome-picker .mbi-chip:hover { transform: translateY(-2px); border-color: var(--chip-c); }
.page-minecraft-biome-picker .mbi-chip.is-on { opacity: 1; border-color: var(--chip-c); box-shadow: 0 6px 16px -10px var(--chip-c); }
.page-minecraft-biome-picker .mbi-chip.is-custom { opacity: 1; border-style: dashed; border-color: var(--chip-c); }
.page-minecraft-biome-picker .mbi-chip-x {
    position: absolute; top: -7px; right: -7px; width: 18px; height: 18px; border-radius: 50%;
    background: var(--mbi-primary); color: #fff; font-size: 13px; font-weight: 700; line-height: 18px; text-align: center;
    box-shadow: 0 2px 5px -1px rgba(0, 0, 0, .4);
}
.page-minecraft-biome-picker .mbi-custom-row { display: flex; gap: .4rem; margin-top: .6rem; }
.page-minecraft-biome-picker .mbi-custom-row input {
    flex: 1 1 auto; border: 1px solid var(--mbi-border); border-radius: 8px; padding: .5rem .7rem; font-size: .9rem;
    background: var(--mbi-surface); color: var(--mbi-ink);
}
.page-minecraft-biome-picker .mbi-custom-row button { border: 0; border-radius: 8px; padding: .5rem .9rem; font-weight: 700; color: #fff; background: var(--mbi-grad); cursor: pointer; }

/* ---- SEO content section ------------------------------------------------
   Colour + accents ONLY. The type scale comes from the shared .content-guide
   class on the wrapper — never re-declare heading font sizes here. */
.page-minecraft-biome-picker .mbi-content {
    color: var(--mbi-ink);
    background: linear-gradient(180deg, #ffffff 0%, #eff8ef 100%);
    padding: 3.5rem 0 3.75rem; margin-top: 1rem;
    border-top: 1px solid var(--mbi-border);
}
body[data-theme].page-minecraft-biome-picker .mbi-content { background: var(--theme-bg); }
.page-minecraft-biome-picker .mbi-inner { max-width: 860px; margin: 0 auto; padding: 0 1rem; }
.page-minecraft-biome-picker .mbi-content h2,
.page-minecraft-biome-picker .mbi-content h3 { color: var(--mbi-ink); }
.page-minecraft-biome-picker .mbi-content p,
.page-minecraft-biome-picker .mbi-content li { color: var(--mbi-muted); }
.page-minecraft-biome-picker .mbi-content strong { color: var(--mbi-ink); }
.page-minecraft-biome-picker .mbi-content em { color: var(--mbi-ink); font-style: italic; }
.page-minecraft-biome-picker .mbi-content a { color: var(--mbi-primary); text-decoration: underline; text-underline-offset: 2px; font-weight: 600; }
.page-minecraft-biome-picker .mbi-content a:hover { color: #15803d; }

.page-minecraft-biome-picker .mbi-kicker {
    display: inline-block; font-size: .72rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase;
    color: #fff; background: var(--mbi-grad); border-radius: 4px; padding: .3rem .85rem; margin-bottom: .85rem;
}
.page-minecraft-biome-picker .mbi-lead { font-size: 1.2rem; line-height: 1.7; color: var(--mbi-ink); }
.page-minecraft-biome-picker .mbi-section { margin-top: 3rem; }
.page-minecraft-biome-picker .mbi-list { margin: .4rem 0 0; padding-left: 1.15rem; }

.page-minecraft-biome-picker .mbi-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: .9rem; margin-top: 1.4rem; }
.page-minecraft-biome-picker .mbi-step {
    display: flex; gap: .75rem; align-items: flex-start;
    background: var(--mbi-surface); border: 1px solid var(--mbi-border); border-radius: 10px; padding: 1rem 1.05rem;
    box-shadow: 0 10px 24px -18px rgba(21, 128, 61, .6);
}
.page-minecraft-biome-picker .mbi-step-num {
    flex: none; width: 32px; height: 32px; display: grid; place-items: center; border-radius: 6px;
    font-weight: 800; color: #fff; background: var(--mbi-grad);
}
.page-minecraft-biome-picker .mbi-step-body { min-width: 0; }
.page-minecraft-biome-picker .mbi-step-title { font-weight: 800; color: var(--mbi-ink); margin-bottom: .15rem; }
.page-minecraft-biome-picker .mbi-step-body p { font-size: .9rem; margin: 0; }

.page-minecraft-biome-picker .mbi-table-wrap { overflow-x: auto; margin-top: 1.4rem; }
.page-minecraft-biome-picker .mbi-ctab { width: 100%; border-collapse: collapse; min-width: 620px; font-size: .95rem; }
.page-minecraft-biome-picker .mbi-ctab thead th {
    text-align: left; text-transform: uppercase; letter-spacing: .06em; font-size: .72rem; font-weight: 800;
    color: #fff; background: var(--mbi-primary); padding: .7rem 1rem;
}
.page-minecraft-biome-picker .mbi-ctab tbody td { padding: .7rem 1rem; border-bottom: 1px solid var(--mbi-border); vertical-align: top; }
.page-minecraft-biome-picker .mbi-ctab tbody tr:nth-child(even) { background: rgba(22, 163, 74, .05); }
.page-minecraft-biome-picker .mbi-ctab tbody td:first-child { font-weight: 700; color: var(--mbi-ink); white-space: nowrap; }

.page-minecraft-biome-picker .mbi-callout {
    margin-top: 1.4rem; border-left: 4px solid var(--mbi-primary); border-radius: 0 8px 8px 0;
    background: rgba(22, 163, 74, .08); padding: 1rem 1.15rem;
}
.page-minecraft-biome-picker .mbi-callout p { margin: 0; }

@media (max-width: 767.98px) {
    .page-minecraft-biome-picker .mbi-steps { grid-template-columns: 1fr; }
    .page-minecraft-biome-picker .mbi-content { padding: 2.5rem 0 2.75rem; }
}


/* ---- High-contrast -------------------------------------------------------
   HC sets --theme-muted: #1f2937, which is right on its WHITE cards and
   unreadable on its BLACK body (measured 1.43:1). So the content section's
   copy goes light, and every white-surfaced component inside it is restored
   to dark with a more specific selector. Must stay LAST in the file:
   equal-specificity declarations are resolved by source order. */
body[data-theme="high-contrast"].page-minecraft-biome-picker .mbi-content p,
body[data-theme="high-contrast"].page-minecraft-biome-picker .mbi-content li,
body[data-theme="high-contrast"].page-minecraft-biome-picker .mbi-ctab tbody td {
    color: rgba(255, 255, 255, .84);
}
body[data-theme="high-contrast"].page-minecraft-biome-picker .mbi-step-body p,
body[data-theme="high-contrast"].page-minecraft-biome-picker .mbi-step-title,
body[data-theme="high-contrast"].page-minecraft-biome-picker .mbi-step strong {
    color: #1f2937;
}

/* ⚠️ FULLSCREEN winner-bar slot. picker-ui.css reserves 150px by default, which
   is right for most engines — but this one's verdict text wraps and the bar
   measured 157–173px here, so the FIRST reveal grew the slot and shifted the
   centred stage (-11px on the challenge page). The reservation must cover the
   bar's real filled height; ui-standard-check.js asserts that. */
body { --wsp-zen-bar-h: 190px; }