/* Popov Academy — content-factory/archimedes-winter-2023-2024-v1: student labs (loaded only on these pages).
   Colours are local variables. Dark values follow the site's own theme switch (html[data-design=v2] with
   data-theme=dark, or the system dark mode unless data-theme=light) and reuse the site tokens from
   redesign.css, as in the 2025 package; the global theme itself is not changed. */
.arch-lab{min-width:0;--arch-surface:#fff;--arch-ink:#1f2937;--arch-label:#203c58;--arch-muted:#5b6b82;--arch-field-line:#aebed1;--arch-soft-line:#d7e1ed;--arch-primary-bg:#244974;--arch-primary-ink:#fff;--arch-link:#244974;--arch-pressed-bg:#e6eefb;--arch-pressed-line:#244974;--arch-good:#047857;--arch-bad:#b91c1c;--arch-focus:#f59e0b;--arch-fig-line:#1f2937;--arch-grid:#c7d2e0;--arch-fill:#dbeafe;--arch-piece-a:#bfdbfe;--arch-piece-b:#fde68a;--arch-piece-c:#fecaca;--arch-piece-d:#bbf7d0;--arch-accent:#c2410c;--arch-water:#e0f2fe;--arch-ok-bg:#dcfce7;--arch-bad-bg:#fee2e2;--arch-knight:#1d4ed8;--arch-liar:#9f1239;--arch-clear:#e2e8f0}
@media (prefers-color-scheme: dark){:root[data-design="v2"]:not([data-theme="light"]) .arch-lab{--arch-surface:var(--play-stage);--arch-ink:var(--ink);--arch-label:var(--ink);--arch-muted:var(--ink-2);--arch-field-line:var(--ink-3);--arch-soft-line:var(--play-line);--arch-primary-bg:var(--accent);--arch-primary-ink:var(--on-ink);--arch-link:var(--accent-ink);--arch-pressed-bg:var(--accent-soft);--arch-pressed-line:var(--accent);--arch-good:var(--ok);--arch-bad:var(--bad);--arch-fig-line:#dbe4f0;--arch-grid:#4a5568;--arch-fill:#1e3a5f;--arch-piece-a:#1e40af;--arch-piece-b:#854d0e;--arch-piece-c:#9f1239;--arch-piece-d:#166534;--arch-accent:#fb923c;--arch-water:#0c2a3f;--arch-ok-bg:#14341f;--arch-bad-bg:#431818;--arch-knight:#93c5fd;--arch-liar:#fda4af;--arch-clear:#3f4654}}
:root[data-design="v2"][data-theme="dark"] .arch-lab{--arch-surface:var(--play-stage);--arch-ink:var(--ink);--arch-label:var(--ink);--arch-muted:var(--ink-2);--arch-field-line:var(--ink-3);--arch-soft-line:var(--play-line);--arch-primary-bg:var(--accent);--arch-primary-ink:var(--on-ink);--arch-link:var(--accent-ink);--arch-pressed-bg:var(--accent-soft);--arch-pressed-line:var(--accent);--arch-good:var(--ok);--arch-bad:var(--bad);--arch-fig-line:#dbe4f0;--arch-grid:#4a5568;--arch-fill:#1e3a5f;--arch-piece-a:#1e40af;--arch-piece-b:#854d0e;--arch-piece-c:#9f1239;--arch-piece-d:#166534;--arch-accent:#fb923c;--arch-water:#0c2a3f;--arch-ok-bg:#14341f;--arch-bad-bg:#431818;--arch-knight:#93c5fd;--arch-liar:#fda4af;--arch-clear:#3f4654}
.arch-try{margin:18px 0}
.arch-lab [data-arch-lab-body]{display:grid;grid-template-columns:minmax(0,1fr);gap:14px;min-width:0}
.arch-lab .arch-lab-fallback{color:var(--arch-muted);font-size:15px}
.arch-lab label,.arch-lab .arch-label{font-weight:600;color:var(--arch-label)}
.arch-lab .arch-help{font-size:14px;color:var(--arch-muted);margin:0}
.arch-lab .arch-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap;min-width:0}
.arch-lab input[type=text],.arch-lab input[type=number],.arch-lab select{font:inherit;font-size:18px;min-height:44px;padding:8px 12px;border:1px solid var(--arch-field-line);border-radius:12px;background:var(--arch-surface);color:var(--arch-ink);min-width:0}
.arch-lab input[type=number]{width:88px}
.arch-lab input[type=range]{flex:1 1 180px;min-width:0;min-height:44px;accent-color:var(--arch-primary-bg)}
.arch-lab button{font:inherit;font-size:16px;min-height:44px;min-width:44px;padding:10px 16px;border-radius:999px;line-height:1.4;max-width:100%;white-space:normal;cursor:pointer}
.arch-lab .arch-primary{background:var(--arch-primary-bg);color:var(--arch-primary-ink);border:1px solid var(--arch-primary-bg)}
.arch-lab .arch-secondary{background:var(--arch-surface);color:var(--arch-link);border:1px solid var(--arch-field-line)}
.arch-lab button[aria-disabled=true]{opacity:.45;cursor:default}
.arch-lab button:focus-visible,.arch-lab input:focus-visible,.arch-lab select:focus-visible,.arch-lab [tabindex]:focus-visible{outline:3px solid var(--arch-focus);outline-offset:2px}
.arch-lab .arch-actions{display:flex;flex-wrap:wrap;gap:8px}
.arch-lab .arch-toggle{display:flex;flex-wrap:wrap;gap:6px}
.arch-lab .arch-toggle button{background:var(--arch-surface);color:var(--arch-link);border:1px solid var(--arch-field-line)}
.arch-lab .arch-toggle button[aria-pressed=true]{background:var(--arch-pressed-bg);border-color:var(--arch-pressed-line);font-weight:600}
.arch-lab .arch-result{background:var(--arch-surface);color:var(--arch-ink);border:1px solid var(--arch-soft-line);border-radius:14px;padding:14px 16px;line-height:1.55;min-width:0;overflow-wrap:anywhere}
.arch-lab .arch-result:empty{display:none}
.arch-lab :is(button,input,select){scroll-margin-block:120px}
.arch-lab .arch-result p{margin:6px 0}
.arch-lab .arch-checks{list-style:none;padding:0;margin:6px 0;display:grid;gap:6px}
.arch-lab .arch-checks li{display:flex;gap:8px;align-items:flex-start}
.arch-lab .arch-pass::before{content:'✓';color:var(--arch-good);font-weight:700;flex-shrink:0;width:1.2em}
.arch-lab .arch-fail::before{content:'✗';color:var(--arch-bad);font-weight:700;flex-shrink:0;width:1.2em}
.arch-lab .arch-good{color:var(--arch-good);font-weight:600}
.arch-lab .arch-bad{color:var(--arch-bad);font-weight:600}
.arch-lab .arch-sub{display:grid;gap:8px;border-top:1px solid var(--arch-soft-line);padding-top:12px}
.arch-lab .arch-stage{background:var(--arch-surface);border:1px solid var(--arch-soft-line);border-radius:8px;padding:8px;min-width:0}
.arch-lab .arch-stage svg{display:block;width:100%;height:auto;max-height:70vh;touch-action:manipulation}
.arch-lab svg text{fill:var(--arch-ink);font-family:system-ui,-apple-system,"Segoe UI",Arial,sans-serif}
.arch-lab .arch-readouts{display:flex;flex-wrap:wrap;gap:8px 18px;margin:0;font-variant-numeric:tabular-nums}
.arch-lab .arch-readouts div{display:flex;gap:6px;align-items:baseline}
.arch-lab .arch-readouts dt{color:var(--arch-muted);font-size:14px}
.arch-lab .arch-readouts dd{margin:0;font-weight:600;color:var(--arch-ink);white-space:nowrap;overflow-wrap:normal}
.arch-lab .arch-table-wrap{overflow-x:auto;max-width:100%}
.arch-lab table.arch-table{border-collapse:collapse;font-variant-numeric:tabular-nums}
.arch-lab table.arch-table th,.arch-lab table.arch-table td{border:1px solid var(--arch-soft-line);padding:4px 8px;text-align:center;color:var(--arch-ink)}
.arch-lab table.arch-table th{color:var(--arch-label);font-weight:600}
.arch-lab .arch-chip{display:inline-flex;align-items:center;justify-content:center;min-width:2.2em;padding:2px 8px;border-radius:999px;border:1px solid var(--arch-soft-line);font-weight:600}
@media(max-width:480px){.arch-lab .arch-row .arch-primary{flex:1 1 100%}.arch-lab button{padding:8px 10px}}
/* 2024 1.4 lock */
.arch-lab .arch-lock{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;max-width:440px}
.arch-lab .arch-key{display:grid;place-items:center;gap:0;min-height:58px;padding:6px 2px;background:var(--arch-surface);color:var(--arch-ink);border:1.5px solid var(--arch-field-line);border-radius:8px;font-variant-numeric:tabular-nums}
.arch-lab .arch-key-num{font-size:20px;font-weight:600}
.arch-lab .arch-key-rem{font-size:13px;color:var(--arch-muted)}
.arch-lab .arch-key[data-rem="6"]{background:var(--arch-piece-a)}
.arch-lab .arch-key[data-rem="4"]{background:var(--arch-piece-b)}
.arch-lab .arch-key[data-rem="8"]{background:var(--arch-piece-c)}
.arch-lab .arch-key[aria-pressed=true]{border:3px solid var(--arch-accent);box-shadow:inset 0 0 0 2px var(--arch-surface)}
.arch-lab .arch-key[aria-pressed=true] .arch-key-num::after{content:' ✓';color:var(--arch-accent)}
/* shared: play button keeps its width next to a time slider, also on phones */
.arch-lab .arch-timeline{flex-wrap:nowrap}
.arch-lab .arch-timeline .arch-play{flex:0 0 auto;min-width:96px}
/* 2024 1.1 cut */
.arch-lab .arch-cut-stage svg{max-width:320px;margin:auto}
.arch-lab .arch-cut-controls{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-start}
.arch-lab .arch-pad{display:grid;grid-template-columns:repeat(3,48px);gap:6px}
.arch-lab .arch-pad button{padding:0;font-size:20px;min-width:48px}
.arch-lab .arch-col{flex-direction:column;align-items:stretch;flex:1 1 180px}
/* 2024 1.2 dominoes */
.arch-lab .arch-domino{display:grid;grid-template-columns:repeat(7,minmax(0,46px));gap:0;justify-content:center;margin:auto}
.arch-lab .arch-domino-gap{aspect-ratio:1}
.arch-lab .arch-domino-cell{aspect-ratio:1;min-width:0;min-height:0;width:100%;padding:0;border-radius:0;background:var(--arch-surface);border:1px solid var(--arch-grid);outline-offset:-3px}
.arch-lab .arch-domino-cell[aria-pressed=true]{background:var(--arch-pressed-bg);box-shadow:inset 0 0 0 3px var(--arch-accent)}
.arch-lab .arch-domino-cell[data-region=a]{background:var(--arch-piece-a)}.arch-lab .arch-domino-cell[data-region=b]{background:var(--arch-piece-d)}.arch-lab .arch-domino-cell[data-region=c]{background:var(--arch-piece-b)}
.arch-lab .arch-domino-cell.arch-on{border:3px solid var(--arch-fig-line);background-image:radial-gradient(circle,var(--arch-fig-line) 0 3px,transparent 3.5px)}
.arch-lab .arch-domino-cell.arch-on:not([data-region]),.arch-lab .arch-domino-cell.arch-on[data-region=""]{background-color:var(--arch-fill)}
.arch-lab .arch-join-r{border-right-width:0!important}.arch-lab .arch-join-l{border-left-width:0!important}.arch-lab .arch-join-d{border-bottom-width:0!important}.arch-lab .arch-join-u{border-top-width:0!important}
/* 2024 1.3 game */
.arch-lab .arch-x{font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
.arch-lab td.arch-hit{background:var(--arch-ok-bg);font-weight:700}
.arch-lab table.arch-table caption{text-align:left;padding-bottom:4px}
/* 2024 2.1 coins */
.arch-lab .arch-coins{display:grid;grid-template-columns:repeat(3,60px);gap:0;justify-content:start}
.arch-lab .arch-coin{width:60px;height:60px;border-radius:0;border:1.5px solid var(--arch-fig-line);background:var(--arch-surface);position:relative;font-weight:700;color:var(--arch-ink)}
.arch-lab .arch-coin::before{content:'';position:absolute;inset:14px;border-radius:50%;background:#e5e7eb;border:1.5px solid #64748b;z-index:0}
.arch-lab .arch-coin[data-side=left]::before,.arch-lab .arch-coin[data-side=right]::before{background:#fde68a;border-color:var(--arch-accent);border-width:3px}
.arch-lab .arch-coin{isolation:isolate;color:#1f2937;font-size:18px}
.arch-lab .arch-coin>*{position:relative}
.arch-lab .arch-history{margin:0;padding-left:1.4em;display:grid;gap:4px}
.arch-lab .arch-minisets{display:flex;flex-wrap:wrap;gap:10px}
.arch-lab .arch-miniset{display:grid;grid-template-columns:repeat(3,18px);gap:2px;padding:4px;border:1px solid var(--arch-soft-line);border-radius:6px}
.arch-lab .arch-miniset span{width:18px;height:18px;border-radius:50%;background:#e5e7eb;border:1px solid #64748b}
.arch-lab .arch-miniset span.arch-g{background:#f59e0b;border-color:#92400e}
.arch-lab .arch-miniset.arch-out{opacity:.3}
.arch-lab .arch-miniset.arch-secret{outline:3px solid var(--arch-accent)}
/* 2024 2.3 table */
.arch-lab .arch-table-stage svg{max-width:340px;margin:auto}
.arch-lab .arch-seat{cursor:pointer;outline:none}
.arch-lab .arch-seat:focus-visible circle{stroke:var(--arch-focus);stroke-width:4}
/* 2024 2.4 apples */
.arch-lab .arch-steppers{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:10px}
.arch-lab .arch-stepper{display:grid;gap:6px}
.arch-lab .arch-nowrap{flex-wrap:nowrap}
.arch-lab .arch-step{font-size:22px;padding:0}
.arch-lab .arch-stepper input{width:72px;text-align:center}
.arch-lab .arch-swatch{display:inline-block;width:.85em;height:.85em;border-radius:50%;margin-right:.4em;vertical-align:-.05em;box-shadow:0 0 0 1.5px var(--arch-fig-line)}
.arch-lab .arch-apple-g .arch-swatch{background:#22c55e}.arch-lab .arch-apple-y .arch-swatch{background:#facc15}.arch-lab .arch-apple-r .arch-swatch{background:#dc2626}
/* 2023 1.1 petals */
.arch-lab .arch-petal-stage svg{max-width:360px;margin:auto}
.arch-lab .arch-petal{cursor:pointer;outline:none}.arch-lab .arch-petal[aria-disabled=true]{cursor:default}
.arch-lab .arch-petal:focus-visible path{stroke:var(--arch-focus);stroke-width:4}
/* 2023 1.2 cards */
.arch-lab .arch-card-sums{display:flex;flex-wrap:wrap;gap:14px 22px}
.arch-lab .arch-card-sum{display:grid;gap:4px}
.arch-lab .arch-card-sum .arch-label{margin:0}
.arch-lab .arch-card-col{display:grid;grid-template-columns:auto 84px;gap:4px 6px;align-items:center}
.arch-lab .arch-card-col>input,.arch-lab .arch-card-col>output{grid-column:2}
.arch-lab .arch-plus{grid-row:1/3;grid-column:1;font-size:24px;font-weight:700;color:var(--arch-ink)}
.arch-lab .arch-line{grid-column:1/3;border-top:2px solid var(--arch-fig-line);height:0}
.arch-lab input.arch-card-input{width:84px;letter-spacing:.3em;text-align:center;font-variant-numeric:tabular-nums;padding:6px 4px}
.arch-lab .arch-card-copy{display:block;width:84px;min-height:44px;line-height:44px;text-align:center;letter-spacing:.3em;font-size:18px;color:var(--arch-muted);border:1px dashed var(--arch-field-line);border-radius:6px}
/* 2023 1.3 nuggets */
.arch-lab .arch-nuggets{display:grid;grid-template-columns:repeat(auto-fill,minmax(92px,1fr));gap:8px;max-width:520px}
.arch-lab .arch-nugget{display:grid;gap:2px;justify-items:center;padding:6px 4px;background:var(--arch-surface);color:var(--arch-ink);border:1.5px solid var(--arch-field-line);border-radius:8px;font-variant-numeric:tabular-nums}
.arch-lab .arch-nugget-w{font-size:18px;font-weight:700}
.arch-lab .arch-nugget-where,.arch-lab .arch-nugget-rem{font-size:13px;color:var(--arch-muted)}
.arch-lab .arch-nugget-rem.arch-odd{color:var(--arch-accent);font-weight:700}
.arch-lab .arch-nugget[data-side=L]{background:var(--arch-piece-a);border-color:var(--arch-fig-line)}
.arch-lab .arch-nugget[data-side=R]{background:var(--arch-piece-b);border-color:var(--arch-fig-line)}
.arch-lab .arch-nugget[data-side=L] .arch-nugget-where,.arch-lab .arch-nugget[data-side=R] .arch-nugget-where{color:var(--arch-ink);font-weight:600}
.arch-lab .arch-scales-stage svg{max-width:420px;margin:auto}
/* 2023 1.4 viruses */
.arch-lab .arch-viruses{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:8px}
.arch-lab .arch-virus{display:grid;gap:2px;justify-items:start;text-align:left;background:var(--arch-surface);color:var(--arch-ink);border:1.5px solid var(--arch-field-line)}
.arch-lab .arch-virus strong{font-size:18px}.arch-lab .arch-virus span{font-size:14px;color:var(--arch-muted)}
.arch-lab .arch-order{display:flex;gap:8px;list-style:none;padding:0;margin:0;counter-reset:slot}
.arch-lab .arch-slot{counter-increment:slot;flex:1 1 0;max-width:72px;min-width:44px;min-height:44px;display:grid;place-items:center;border:1.5px dashed var(--arch-field-line);border-radius:8px;font-weight:700;font-size:18px;color:var(--arch-muted);position:relative}
.arch-lab .arch-slot::before{content:counter(slot);position:absolute;top:-9px;left:6px;font-size:12px;background:var(--arch-surface);padding:0 3px;color:var(--arch-muted);font-weight:400}
.arch-lab .arch-slot-on{border-style:solid;border-color:var(--arch-pressed-line);background:var(--arch-pressed-bg);color:var(--arch-ink)}
.arch-lab .arch-numbers{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(98px,1fr));gap:6px}
.arch-lab .arch-number{display:grid;gap:1px;padding:6px 8px;border:1px solid var(--arch-soft-line);border-radius:6px;background:var(--arch-surface);font-size:13px;color:var(--arch-muted)}
.arch-lab .arch-number-n{font-size:20px;font-weight:700;color:var(--arch-ink);font-variant-numeric:tabular-nums}
.arch-lab .arch-number-by{font-weight:600;color:var(--arch-ink)}
.arch-lab .arch-pass-chip{background:var(--arch-ok-bg)}
.arch-lab .arch-fail-chip{background:var(--arch-bad-bg);border:2px solid var(--arch-bad)}
.arch-lab .arch-multi{box-shadow:inset 4px 0 0 var(--arch-accent)}
.arch-lab .arch-number-can{color:var(--arch-accent);font-weight:600}
/* 2023 2.1 deposit */
.arch-lab .arch-dep-table td:first-child{text-align:left}
.arch-lab .arch-dep-table tfoot th{text-align:right}
/* 2023 2.3 allotments */
.arch-lab .arch-dacha-stage svg{max-width:400px;margin:auto}
.arch-lab .arch-plot-cell{cursor:pointer;outline:none}
.arch-lab .arch-plot-cell:focus-visible rect{stroke:var(--arch-focus)!important;stroke-width:4}
.arch-lab .arch-dacha-tools svg{flex:0 0 auto;border:1px solid var(--arch-soft-line);border-radius:6px;background:var(--arch-surface)}
/* 2023 2.4 sapper */
.arch-lab .arch-minefield{display:grid;grid-template-columns:repeat(9,minmax(0,44px));gap:3px;justify-content:start}
.arch-lab .arch-mine-cell{aspect-ratio:1;min-width:0;min-height:0;width:100%;padding:0;border-radius:4px;background:var(--arch-surface);border:1.5px solid var(--arch-field-line);position:relative}
.arch-lab .arch-mine-cell.arch-sel{background:var(--arch-piece-b);border-color:var(--arch-fig-line);border-width:2px}
.arch-lab .arch-mine-cell.arch-clear{background:var(--arch-clear);border-color:var(--arch-clear)}
.arch-lab .arch-mine-cell.arch-clear.arch-sel{background:var(--arch-piece-b)}
.arch-lab .arch-mine-cell.arch-mine{background:var(--arch-bad-bg);border:2.5px solid var(--arch-bad)}
.arch-lab .arch-mine-cell.arch-mine::after{content:'✱';color:var(--arch-bad);font-size:20px;font-weight:700;position:absolute;inset:0;display:grid;place-items:center}
.arch-lab .arch-mine-cell.arch-keycell::before{content:'';position:absolute;inset:28%;border-radius:50%;background:var(--arch-accent)}
.arch-lab .arch-line-row{gap:4px}
.arch-lab .arch-line-row .arch-label{min-width:5.2em;font-size:15px}
/* row and column buttons are round number tokens, so they never read as field cells */
.arch-lab .arch-line-btn{min-width:44px;padding:6px 0;border-radius:22px;font-weight:600}
.arch-lab .arch-col-btn{min-width:0;width:100%;margin-bottom:4px}
@media(max-width:480px){.arch-lab .arch-line-row .arch-label{flex:1 1 100%}}
.arch-lab table.arch-dep-table{width:100%}
.arch-lab .arch-dep-table td:last-child{width:5em;font-weight:600}
/* contrast: muted or accent text never sits on the coloured fills */
.arch-lab .arch-key[data-rem="6"] .arch-key-rem,.arch-lab .arch-key[data-rem="4"] .arch-key-rem,.arch-lab .arch-key[data-rem="8"] .arch-key-rem{color:var(--arch-ink)}
.arch-lab .arch-nugget[data-side=L] .arch-nugget-rem,.arch-lab .arch-nugget[data-side=R] .arch-nugget-rem{color:var(--arch-ink)}
.arch-lab .arch-nugget-rem.arch-odd{text-decoration:underline;text-underline-offset:2px}
.arch-lab .arch-pass-chip .arch-number-can,.arch-lab .arch-fail-chip .arch-number-can{color:var(--arch-ink)}
.arch-lab .arch-pass-chip,.arch-lab .arch-fail-chip{color:var(--arch-ink)}
/* Inside the «Исследовать» disclosure the lab already has a frame: on phones drop the second one so models keep their width. */
@media (max-width:560px){.lesson-disclosure .arch-lab{padding:0;border:0;background:none;box-shadow:none}.lesson-disclosure .arch-lab .arch-stage{padding:4px}}
.arch-lab .arch-river-stage svg{max-width:560px;margin:auto}
/* Phones: «Крупные клетки» (ui.mjs zoomable). Cells keep at least 44 px and the board scrolls sideways in its frame;
   the board geometry is unchanged, only its scale. */
.arch-lab .arch-zoom{min-width:0}
.arch-lab .arch-zoom-tools{margin-bottom:8px}
.arch-lab .arch-zoom-hint{margin:0 0 8px;font-weight:600;color:var(--arch-label)}
.arch-lab .arch-zoom-probe{height:0}
.arch-lab .arch-zoom-scroll{overflow-x:auto;overscroll-behavior-x:contain;padding:4px;min-width:0}
.arch-lab .arch-zoomed .arch-minefield{grid-template-columns:repeat(9,44px);width:max-content}
.arch-lab .arch-zoomed .arch-domino{grid-template-columns:repeat(7,44px);width:max-content}
.arch-lab .arch-zoomed .arch-dacha-stage svg{width:384px;max-width:none;max-height:none}

/* Final owner-requested edition: clear, consistent controls and two-sided experiments. */
.arch-lab .arch-coin-workspace{display:grid;grid-template-columns:180px minmax(0,1fr);gap:24px;align-items:center}
.arch-lab .arch-coin-scales{min-width:0}
.arch-lab .arch-coin-side{position:absolute;right:2px;bottom:0;font-size:12px;font-weight:700;color:var(--arch-ink)}
.arch-lab .arch-apple-halves{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.arch-lab .arch-apple-halves:empty{display:none}
.arch-lab .arch-halves-caption{grid-column:1/-1}
.arch-lab .arch-bear-share{padding:16px;border:1px solid var(--arch-soft-line);border-radius:16px;background:var(--arch-surface);min-width:0}
.arch-lab .arch-bear-share h4{font-size:16px;margin:0 0 14px;color:var(--arch-ink)}
.arch-lab .arch-bear-share p{font-size:16px;margin:14px 0 0}
.arch-lab .arch-apple-counts{list-style:none;padding:0;margin:0;display:grid;gap:8px;font-size:15px}
.arch-lab .arch-apple-counts li{display:flex;justify-content:space-between;gap:12px}
.arch-lab .arch-apple-counts strong{font-size:20px;font-variant-numeric:tabular-nums;color:var(--arch-ink)}
@media(max-width:700px){.arch-lab .arch-coin-workspace{grid-template-columns:1fr}.arch-lab .arch-coins{justify-self:center}}
@media(max-width:440px){.arch-lab .arch-apple-halves{grid-template-columns:1fr}}

/* Keep the shared research renderer aligned with the current site on this set only.
   Diagrams retain their light paper; controls and readouts follow the selected theme. */
[data-problem-id^="archimedes-winter-"] .cf-figure figcaption,
[data-problem-id^="archimedes-winter-"] .lesson-source{color:var(--ink-2)}
[data-problem-id^="archimedes-winter-"] .lesson-source summary{color:var(--ink)}
[data-problem-id^="archimedes-winter-"] :is(button[data-cf-zoom],button[data-cf-scene-zoom]){color:var(--ink);background:var(--play-stage);border-color:var(--ink-3);border-radius:999px;min-height:44px;padding:10px 16px;margin-top:12px;max-width:100%;line-height:1.4}
[data-problem-id^="archimedes-winter-"] .interactive-actions button{color:var(--ink);background:var(--play-stage);border-color:var(--ink-3);font-size:16px}
[data-problem-id^="archimedes-winter-"] .interactive-actions button[data-action=play]{color:var(--on-ink);background:var(--ink);border-color:var(--ink)}
[data-problem-id^="archimedes-winter-"] .interactive-range-row{grid-template-columns:minmax(60px,1fr) 88px}
[data-problem-id^="archimedes-winter-"] .cf-number{background:var(--play-stage);color:var(--ink);border-color:var(--ink-3);border-radius:12px;min-height:44px;height:auto;padding:8px 6px;font-size:18px;font-variant-numeric:tabular-nums}
[data-problem-id^="archimedes-winter-"] .interactive-range-row input[type=range]{min-height:44px;accent-color:var(--accent)}
[data-problem-id^="archimedes-winter-"] .interactive-results>div{background:var(--play-stage);border-color:var(--play-line);border-radius:14px;padding:14px 16px;font-size:16px}
[data-problem-id^="archimedes-winter-"] .interactive-results :is(div,span,strong){color:var(--ink)}
[data-problem-id^="archimedes-winter-"] .learning-interactive :is(button,input){scroll-margin-block:120px}
@media(max-width:360px){[data-problem-id="archimedes-winter-2024-2025-mathematics-6-7-task-1-2"] .math-display .katex{font-size:16px}}
/* Keep diagrams readable as diagrams, without the inherited white text outline. */
[data-problem-id^="archimedes-winter-"] :is(.cf-figure-svg,.cf-zoom-content) svg text{stroke:none;paint-order:normal}
[data-problem-id^="archimedes-winter-"] .cf-figure figcaption button[data-cf-zoom]{display:block;margin:14px auto 0}

.arch-lab .arch-cube button{border-radius:999px}
[data-problem-id^="archimedes-winter-"] .arch-model-entry{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;padding:20px 24px;margin:24px 0;border:1px solid var(--play-line);border-radius:var(--r-lg);background:var(--play-bg);color:var(--ink)}
[data-problem-id^="archimedes-winter-"] .arch-model-entry>div{flex:1 1 240px;min-width:0}
[data-problem-id^="archimedes-winter-"] .arch-model-entry strong{font-size:17px}
[data-problem-id^="archimedes-winter-"] .arch-model-entry p{margin:5px 0 0;color:var(--ink-2);font-size:16px;line-height:1.5}
[data-problem-id^="archimedes-winter-"] .arch-model-entry a{display:inline-flex;gap:12px;align-items:center;min-height:44px;padding:10px 16px;border:1px solid var(--ink-3);border-radius:999px;background:var(--play-stage);color:var(--ink);font:600 16px/1.4 var(--font);text-decoration:none}
[data-problem-id^="archimedes-winter-"] .arch-model-entry a:hover{border-color:var(--accent);color:var(--accent)}
[data-problem-id^="archimedes-winter-"] .arch-model-entry a:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
@media(max-width:480px){[data-problem-id^="archimedes-winter-"] .arch-model-entry{padding:16px}[data-problem-id^="archimedes-winter-"] .arch-model-entry a{width:100%;justify-content:space-between}}

[data-problem-id^="archimedes-winter-"] .arch-math-scroll-note{font:400 13px/1.4 var(--font);color:var(--ink-2);margin:4px 0 16px}
[data-problem-id^="archimedes-winter-"] .arch-math-scroll-note[hidden]{display:none}