/* Popov Academy — content-factory/phystech-2024-25-math-qualifying-v1: student labs (loaded only on these pages); copied from the
   accepted Phystech 2025/26 final package (visuals/lab.css there, unchanged above the «Additions of this package» line).
   Base styles shared by all labs; each lab may add visuals/labs/<kind>.css, which assets.mjs appends to this file.
   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}}
/* 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}
/* 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}}
/* 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}
/* shared extras for this package: cell boards built from buttons, a status line that is never hidden under the
   sticky header after a programmatic scroll, and a compact step list */
.arch-lab .arch-board{display:grid;gap:0;justify-content:center;margin:auto}
.arch-lab .arch-cell{aspect-ratio:1;min-width:0;min-height:0;width:100%;padding:0;border-radius:0;background:var(--arch-surface);color:var(--arch-ink);border:1px solid var(--arch-grid);outline-offset:-3px;font-variant-numeric:tabular-nums}
.arch-lab .arch-result{scroll-margin-top:96px;scroll-margin-bottom:96px}
.arch-lab .arch-log{margin:0;padding-left:1.4em;display:grid;gap:4px;font-variant-numeric:tabular-nums}
.arch-lab .arch-legend{display:flex;flex-wrap:wrap;gap:6px 16px;margin:0;padding:0;list-style:none;font-size:14px;color:var(--arch-ink)}
.arch-lab .arch-legend li{display:flex;align-items:center;gap:6px}

/* Same page presentation as the final 2023–2024 edition on main (GPT polish of 18.10.2026): the shared research
   renderer follows the current site on these pages only. Diagrams keep their light paper; controls and readouts
   follow the selected theme. */
[data-problem-id^="phystech-2024-2025-math-"] .cf-figure figcaption,
[data-problem-id^="phystech-2024-2025-math-"] .lesson-source{color:var(--ink-2)}
[data-problem-id^="phystech-2024-2025-math-"] .lesson-source summary{color:var(--ink)}
[data-problem-id^="phystech-2024-2025-math-"] :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^="phystech-2024-2025-math-"] .interactive-actions button{color:var(--ink);background:var(--play-stage);border-color:var(--ink-3);font-size:16px}
[data-problem-id^="phystech-2024-2025-math-"] .interactive-actions button[data-action=play]{color:var(--on-ink);background:var(--ink);border-color:var(--ink)}
[data-problem-id^="phystech-2024-2025-math-"] .interactive-range-row{grid-template-columns:minmax(60px,1fr) 88px}
[data-problem-id^="phystech-2024-2025-math-"] .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^="phystech-2024-2025-math-"] .interactive-range-row input[type=range]{min-height:44px;accent-color:var(--accent)}
[data-problem-id^="phystech-2024-2025-math-"] .interactive-results>div{background:var(--play-stage);border-color:var(--play-line);border-radius:14px;padding:14px 16px;font-size:16px}
[data-problem-id^="phystech-2024-2025-math-"] .interactive-results :is(div,span,strong){color:var(--ink)}
[data-problem-id^="phystech-2024-2025-math-"] .learning-interactive :is(button,input){scroll-margin-block:120px}
/* Keep diagrams readable as diagrams, without the inherited white text outline. */
[data-problem-id^="phystech-2024-2025-math-"] :is(.cf-figure-svg,.cf-zoom-content) svg text{stroke:none;paint-order:normal}
[data-problem-id^="phystech-2024-2025-math-"] .cf-figure figcaption button[data-cf-zoom]{display:block;margin:14px auto 0}
[data-problem-id^="phystech-2024-2025-math-"] .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^="phystech-2024-2025-math-"] .arch-model-entry>div{flex:1 1 240px;min-width:0}
[data-problem-id^="phystech-2024-2025-math-"] .arch-model-entry strong{font-size:17px}
[data-problem-id^="phystech-2024-2025-math-"] .arch-model-entry p{margin:5px 0 0;color:var(--ink-2);font-size:16px;line-height:1.5}
[data-problem-id^="phystech-2024-2025-math-"] .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^="phystech-2024-2025-math-"] .arch-model-entry a:hover{border-color:var(--accent);color:var(--accent)}
[data-problem-id^="phystech-2024-2025-math-"] .arch-model-entry a:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
@media(max-width:480px){[data-problem-id^="phystech-2024-2025-math-"] .arch-model-entry{padding:16px}[data-problem-id^="phystech-2024-2025-math-"] .arch-model-entry a{width:100%;justify-content:space-between}}

/* ===== Physics controls of this package (visuals/phys.mjs): slider + exact input + large «−»/«+» ===== */
.arch-lab .phx-controls{display:grid;gap:12px;min-width:0}
.arch-lab .phx-params{display:grid;gap:12px;min-width:0}
.arch-lab .phx-param{display:grid;gap:2px;min-width:0;padding:6px 10px;border:1px solid var(--arch-soft-line);border-radius:14px;background:var(--arch-surface)}
.arch-lab .phx-param-label{display:flex;flex-wrap:wrap;gap:4px 10px;align-items:baseline}
.arch-lab .phx-param-name{font-weight:600;color:var(--arch-label)}
.arch-lab .phx-param-bounds{font-weight:400;font-size:13px;color:var(--arch-muted)}
.arch-lab .phx-param .arch-help{font-size:13px}
.arch-lab .phx-param-row{display:grid;grid-template-columns:48px minmax(0,1fr) 48px var(--phx-num-w,84px);gap:8px;align-items:center;min-width:0}
.arch-lab .phx-param-row input[type=range]{width:100%;margin:0}
.arch-lab .phx-step{min-width:48px;min-height:48px;padding:0;font-size:24px;font-weight:600;line-height:1;border-radius:12px}
.arch-lab input.phx-num{width:100%;font-size:18px;min-height:48px;padding:8px 10px;text-align:right;font-variant-numeric:tabular-nums}
.arch-lab .phx-param-msg{margin:0;font-size:14px;color:var(--arch-bad);min-height:0}
.arch-lab .phx-param-msg:empty{display:none}
@media (max-width:420px){
 .arch-lab .phx-param-row{grid-template-columns:48px minmax(0,1fr) 48px;grid-template-areas:"range range range" "minus num plus"}
 .arch-lab .phx-param-row input[type=range]{grid-area:range}
 .arch-lab .phx-param-row .phx-step:first-child{grid-area:minus}
 .arch-lab .phx-param-row .phx-step:nth-child(3){grid-area:plus}
 .arch-lab .phx-param-row input.phx-num{grid-area:num}
}
.arch-lab .phx-presets{display:grid;gap:6px}
.arch-lab .phx-presets-title{margin:0;font-weight:600;color:var(--arch-label)}
.arch-lab .phx-preset[aria-pressed=true]{background:var(--arch-pressed-bg);border-color:var(--arch-pressed-line);font-weight:600}
.arch-lab .phx-preset-state{margin:0;font-size:14px;color:var(--arch-muted)}
.arch-lab .phx-readouts dd.phx-secret{color:var(--arch-muted)}
.arch-lab .phx-time{font-variant-numeric:tabular-nums;font-weight:600;min-width:9em;color:var(--arch-ink)}
.arch-lab .phx-clock{display:grid;gap:6px}
.arch-lab .phx-clock input[type=range]{flex:1 1 160px}
.arch-lab .phx-svg{display:block;width:100%;height:auto}
.arch-lab .phx-stage{padding:4px}
.arch-lab .phx-stage-pair{display:grid;gap:10px;grid-template-columns:minmax(0,1fr)}
@media (min-width:900px){.arch-lab .phx-stage-pair.phx-two{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}}
.arch-lab .phx-choice{display:flex;flex-wrap:wrap;gap:8px}
.arch-lab .phx-note{margin:0;font-size:14px;color:var(--arch-muted)}
/* SVG: theme-aware strokes and fills */
.arch-lab .phx-svg{--phx-a:#1d4ed8;--phx-b:#c2410c;--phx-c:#047857;--phx-d:#7c3aed;--phx-water:#dbeafe;--phx-body:#e2e8f0;--phx-paper:#ffffff}
@media (prefers-color-scheme: dark){:root[data-design="v2"]:not([data-theme="light"]) .arch-lab .phx-svg{--phx-a:#93c5fd;--phx-b:#fdba74;--phx-c:#6ee7b7;--phx-d:#c4b5fd;--phx-water:#0c2a3f;--phx-body:#334155;--phx-paper:transparent}}
:root[data-design="v2"][data-theme="dark"] .arch-lab .phx-svg{--phx-a:#93c5fd;--phx-b:#fdba74;--phx-c:#6ee7b7;--phx-d:#c4b5fd;--phx-water:#0c2a3f;--phx-body:#334155;--phx-paper:transparent}
.arch-lab .phx-svg .phx-line{stroke:var(--arch-fig-line);stroke-width:2;fill:none}
.arch-lab .phx-svg .phx-thin{stroke:var(--arch-fig-line);stroke-width:1;fill:none}
.arch-lab .phx-svg .phx-dash{stroke:var(--arch-muted);stroke-width:1.5;fill:none;stroke-dasharray:5 4}
.arch-lab .phx-svg .phx-body{fill:var(--phx-body);stroke:var(--arch-fig-line);stroke-width:2}
.arch-lab .phx-svg .phx-body-a{fill:var(--phx-a);stroke:var(--arch-fig-line);stroke-width:1.5}
.arch-lab .phx-svg .phx-body-b{fill:var(--phx-b);stroke:var(--arch-fig-line);stroke-width:1.5}
.arch-lab .phx-svg .phx-water{fill:var(--phx-water);stroke:none}
.arch-lab .phx-svg .phx-ground{stroke:var(--arch-fig-line);stroke-width:2.5}
.arch-lab .phx-svg .phx-hatch{stroke:var(--arch-fig-line);stroke-width:1.2}
.arch-lab .phx-svg .phx-grid{stroke:var(--arch-grid);stroke-width:1}
.arch-lab .phx-svg .phx-axis{stroke:var(--arch-fig-line);stroke-width:1.5}
.arch-lab .phx-svg .phx-tick{font-size:12px;fill:var(--arch-muted)}
.arch-lab .phx-svg .phx-axis-label{font-size:13px;font-weight:600}
.arch-lab .phx-svg .phx-text{font-size:15px}
.arch-lab .phx-svg .phx-small{font-size:12.5px}
.arch-lab .phx-svg .phx-big{font-size:18px;font-weight:600}
.arch-lab .phx-svg .phx-curve{fill:none;stroke:var(--phx-a);stroke-width:2.5}
.arch-lab .phx-svg .phx-curve-b{fill:none;stroke:var(--phx-b);stroke-width:2.5}
.arch-lab .phx-svg .phx-curve-c{fill:none;stroke:var(--phx-c);stroke-width:2.5}
.arch-lab .phx-svg .phx-curve-d{fill:none;stroke:var(--phx-d);stroke-width:2.5}
.arch-lab .phx-svg .phx-ghost{fill:none;stroke:var(--arch-muted);stroke-width:1.5;stroke-dasharray:3 4}
.arch-lab .phx-svg .phx-arrow .phx-arrow-shaft{stroke:var(--arch-accent);stroke-width:2.5}
.arch-lab .phx-svg .phx-arrow .phx-arrow-head{fill:var(--arch-accent);stroke:none}
.arch-lab .phx-svg .phx-arrow-a .phx-arrow-shaft{stroke:var(--phx-a);stroke-width:2.5}
.arch-lab .phx-svg .phx-arrow-a .phx-arrow-head{fill:var(--phx-a);stroke:none}
.arch-lab .phx-svg .phx-arrow-b .phx-arrow-shaft{stroke:var(--phx-b);stroke-width:2.5}
.arch-lab .phx-svg .phx-arrow-b .phx-arrow-head{fill:var(--phx-b);stroke:none}
.arch-lab .phx-svg .phx-arrow-c .phx-arrow-shaft{stroke:var(--phx-c);stroke-width:2.5}
.arch-lab .phx-svg .phx-arrow-c .phx-arrow-head{fill:var(--phx-c);stroke:none}
.arch-lab .phx-svg .phx-arrow-ink .phx-arrow-shaft{stroke:var(--arch-fig-line);stroke-width:1.6}
.arch-lab .phx-svg .phx-arrow-ink .phx-arrow-head{fill:var(--arch-fig-line);stroke:none}
.arch-lab .phx-svg .phx-dot{fill:var(--arch-fig-line);stroke:none}
.arch-lab .phx-svg .phx-dot-a{fill:var(--phx-a);stroke:var(--arch-surface);stroke-width:1.5}
.arch-lab .phx-svg .phx-dot-b{fill:var(--phx-b);stroke:var(--arch-surface);stroke-width:1.5}
.arch-lab .phx-svg .phx-dot-c{fill:var(--phx-c);stroke:var(--arch-surface);stroke-width:1.5}
.arch-lab .phx-svg .phx-fill-a{fill:var(--phx-a);fill-opacity:.18;stroke:var(--phx-a);stroke-width:1.5}
.arch-lab .phx-svg .phx-fill-b{fill:var(--phx-b);fill-opacity:.18;stroke:var(--phx-b);stroke-width:1.5}
.arch-lab .phx-svg .phx-fill-c{fill:var(--phx-c);fill-opacity:.18;stroke:var(--phx-c);stroke-width:1.5}
.arch-lab .phx-svg .phx-fill-d{fill:var(--phx-d);fill-opacity:.18;stroke:var(--phx-d);stroke-width:1.5}
.arch-lab .phx-svg .phx-wire{stroke:var(--arch-fig-line);stroke-width:2.5;fill:none;stroke-linecap:round}
.arch-lab .phx-svg .phx-hot{stroke:var(--phx-b);stroke-width:4;fill:none;stroke-linecap:round}
.arch-lab .phx-svg .phx-cold{stroke:var(--phx-a);stroke-width:4;fill:none;stroke-linecap:round}
.arch-lab .phx-svg .phx-text-a{fill:var(--phx-a);font-weight:600}
.arch-lab .phx-svg .phx-text-b{fill:var(--phx-b);font-weight:600}
.arch-lab .phx-svg .phx-text-c{fill:var(--phx-c);font-weight:600}
.arch-lab .phx-svg text{paint-order:stroke;stroke:var(--arch-surface);stroke-width:3px;stroke-linejoin:round}
.arch-lab .phx-svg .phx-tick,.arch-lab .phx-svg .phx-nohalo{stroke:none}
.arch-lab .phx-drag{cursor:grab;touch-action:none}
.arch-lab .phx-handle{fill:var(--phx-b);fill-opacity:.25;stroke:var(--phx-b);stroke-width:2}
.arch-lab .phx-handle:focus-visible{outline:none;stroke:var(--arch-focus);stroke-width:4}
/* Readouts as a two-column table: long values wrap instead of running off a phone screen. */
.arch-lab .phx-readouts{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:6px 12px;align-items:baseline}
.arch-lab .phx-readouts>div{display:contents}
.arch-lab .phx-readouts dd{white-space:normal;overflow-wrap:anywhere}
.arch-lab .phx-svg .phx-rod{stroke:var(--arch-fig-line);stroke-width:7;stroke-linecap:round;fill:none}
.arch-lab .phx-svg .phx-arrow-g .phx-arrow-shaft{stroke:var(--arch-fig-line);stroke-width:3}
.arch-lab .phx-svg .phx-arrow-g .phx-arrow-head{fill:var(--arch-fig-line);stroke:none}
/* ===== Additions of the final package ===== */
/* Check boxes: a large box and a whole-label touch target of at least 44 px. */
.arch-lab label.arch-row{min-height:44px;cursor:pointer;flex-wrap:nowrap}
.arch-lab label.arch-row>span{flex:1 1 auto;min-width:0}
.arch-lab input[type=checkbox]{width:24px;height:24px;margin:0;flex:0 0 auto;accent-color:var(--arch-primary-bg)}

/* Phone controls remain in document flow: a sticky scene hid parameter names,
   sliders and playback buttons while scrolling. Never trade readable controls for a floating scene. */
.learning-interactive.arch-lab{overflow:clip}
@media (max-width:600px) and (min-height:500px){
 .arch-lab .phx-stage{position:relative;top:auto;z-index:auto;background:var(--arch-surface);max-height:40vh}
 .arch-lab .phx-stage .phx-svg{max-height:calc(40vh - 10px)}
 /* z-index:auto too: in a grid or flex lab body a static item with a z-index still stacks and would scroll over the sticky scene */
 .arch-lab .phx-stage ~ .phx-stage,.arch-lab .phx-stage-pair .phx-stage{position:static;z-index:auto;max-height:none}
 .arch-lab .phx-stage-pair .phx-svg{max-height:none}
}
/* Narrow screens: readout names and values in two equal columns, long names may break */
@media (max-width:360px){
 .arch-lab .phx-readouts{grid-template-columns:minmax(0,1.5fr) minmax(0,1fr)}
 .arch-lab .phx-readouts dt{overflow-wrap:anywhere}
}

/* ===== Additions of this package (Phystech 2024/25 math, qualifying) ===== */
/* Official versions: ID chips, the statement of the chosen version, «свои значения» status with a way back. */
.arch-lab .p25-versions{display:grid;gap:8px;min-width:0;padding:12px 14px;border:1px solid var(--arch-soft-line);border-radius:14px;background:var(--arch-surface)}
.arch-lab .p25-versions-head,.arch-lab .p25-data-head{margin:0;font-weight:700;color:var(--arch-label)}
.arch-lab .p25-chip-group{display:grid;gap:4px}
.arch-lab .p25-chip-title{margin:0;font-size:14px;color:var(--arch-muted)}
.arch-lab .p25-chips{gap:8px}
.arch-lab .p25-chip{font-variant-numeric:tabular-nums}
.arch-lab .p25-chip[aria-pressed=true]{background:var(--arch-pressed-bg);border-color:var(--arch-pressed-line);font-weight:700;box-shadow:inset 0 0 0 1px var(--arch-pressed-line)}
.arch-lab .p25-version{display:grid;gap:4px;padding:10px 12px;border-radius:10px;background:var(--p25-paper);border-left:4px solid var(--arch-pressed-line)}
.arch-lab .p25-version p{margin:0}
.arch-lab .p25-version-title{font-size:14px;font-weight:600;color:var(--arch-muted)}
.arch-lab .p25-version-text{font-size:16px;line-height:1.55;color:var(--arch-ink);overflow-wrap:anywhere}
.arch-lab .p25-version-diff{font-size:14px;color:var(--arch-label);font-weight:600}
.arch-lab .p25-status-row{display:flex;flex-wrap:wrap;gap:8px 12px;align-items:center}
.arch-lab .p25-status{margin:0;font-size:14px;color:var(--arch-muted);flex:1 1 220px}
.arch-lab .p25-data{display:grid;gap:8px;min-width:0}
/* the hidden result: nothing of it is in the page before the press */
.arch-lab .p25-secret{display:grid;gap:8px}
.arch-lab .p25-reveal{justify-self:start}
.arch-lab .p25-secret-body{display:grid;gap:6px;padding:12px 14px;border-radius:12px;border:2px solid var(--arch-good);background:var(--arch-surface);color:var(--arch-ink);line-height:1.55}
.arch-lab .p25-secret-body p{margin:0}
.arch-lab .p25-secret-body:focus{outline:3px solid var(--arch-focus);outline-offset:2px}
.arch-lab .p25-secret-body strong{color:var(--arch-good)}
.arch-lab .p25-facts dd.phx-secret{font-weight:700}
/* own actions of a lab: cards, cells, tokens as real buttons with a 44 px target */
.arch-lab .p25-tiles{display:flex;flex-wrap:wrap;gap:6px}
.arch-lab .p25-tile{min-width:44px;min-height:44px;padding:6px 10px;border-radius:10px;border:1px solid var(--arch-field-line);background:var(--arch-surface);color:var(--arch-ink);font-weight:600;font-variant-numeric:tabular-nums}
.arch-lab .p25-tile[aria-pressed=true]{background:var(--arch-pressed-bg);border-color:var(--arch-pressed-line);box-shadow:inset 0 0 0 1px var(--arch-pressed-line)}
.arch-lab .p25-warn{margin:0;padding:10px 12px;border-radius:10px;background:var(--arch-bad-bg);color:var(--arch-ink);border:1px solid var(--arch-bad)}
.arch-lab .p25-ok{margin:0;padding:10px 12px;border-radius:10px;background:var(--arch-ok-bg);color:var(--arch-ink);border:1px solid var(--arch-good)}
.arch-lab .p25-math{font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
/* drawn objects (draw.mjs): illustration colours with an outline that follows the theme */
.arch-lab{--p25-paper:#f6f8fc;--p25-skin:#f6d2b4;--p25-hair-a:#7c4a25;--p25-hair-b:#2b2b33;--p25-hair-c:#d9a441;--p25-shirt-a:#3b82f6;--p25-shirt-b:#ef6c3a;--p25-shirt-c:#22a06b;--p25-shirt-d:#8b5cf6;--p25-pants:#334155;--p25-card:#fffdf7;--p25-card-edge:#c9b98f;--p25-board:#24543f;--p25-board-ink:#f4f1e6;--p25-wood:#b07a43;--p25-candy-a:#ef4444;--p25-candy-b:#f59e0b;--p25-candy-c:#7c4a25;--p25-paper2:#ffffff;--p25-grass:#86c06c;--p25-grass2:#5f9d4b;--p25-soil:#c9a26b;--p25-water:#bfe1f6;--p25-metal:#94a3b8;--p25-glass:#cfe8ff;--p25-track:#d97757}
@media (prefers-color-scheme: dark){:root[data-design="v2"]:not([data-theme="light"]) .arch-lab{--p25-paper:#1b2333;--p25-track:#a3523b;--p25-skin:#e8bf9c;--p25-card:#f3efe2;--p25-card-edge:#8f8466;--p25-board:#1f4a37;--p25-paper2:#e9edf5;--p25-water:#1e4a66;--p25-glass:#8db8de}}
:root[data-design="v2"][data-theme="dark"] .arch-lab{--p25-paper:#1b2333;--p25-track:#a3523b;--p25-skin:#e8bf9c;--p25-card:#f3efe2;--p25-card-edge:#8f8466;--p25-board:#1f4a37;--p25-paper2:#e9edf5;--p25-water:#1e4a66;--p25-glass:#8db8de}
.arch-lab .phx-svg .p25-o{stroke:var(--arch-fig-line);stroke-width:1.6;stroke-linejoin:round;stroke-linecap:round}
.arch-lab .phx-svg .p25-o-thin{stroke:var(--arch-fig-line);stroke-width:1;stroke-linejoin:round}
.arch-lab .phx-svg .p25-card-text{fill:#1f2937;font-weight:700;stroke:none}
.arch-lab .phx-svg .p25-board-text{fill:var(--p25-board-ink);stroke:none;font-family:"Comic Sans MS","Chalkboard SE","Segoe Print",system-ui,sans-serif}
.arch-lab .phx-svg .p25-shadow{fill:#0f172a;fill-opacity:.12;stroke:none}

.arch-lab .phx-svg .p25-track{fill:var(--p25-track);stroke:var(--arch-fig-line);stroke-width:1}
.arch-lab .phx-svg .p25-grass{fill:var(--p25-grass);stroke:var(--arch-fig-line);stroke-width:1}
.arch-lab .phx-svg .p25-lane{fill:none;stroke:#ffffff;stroke-width:1.5;stroke-dasharray:7 7;opacity:.85}
.arch-lab .p25-swap{gap:6px}
.arch-lab .p25-swap .p25-tile{min-width:44px;font-size:20px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--p25-card);color:#1f2937;border-color:var(--p25-card-edge)}
.arch-lab .p25-swap .p25-tile.p25-bad{border:2px solid var(--arch-bad);background:var(--arch-bad-bg);color:var(--arch-ink)}
.arch-lab .p25-swap .p25-tile.p25-r0{box-shadow:inset 0 -5px 0 #3b82f6}
.arch-lab .p25-swap .p25-tile.p25-r1{box-shadow:inset 0 -5px 0 #ef6c3a}
.arch-lab .p25-swap .p25-tile.p25-r2{box-shadow:inset 0 -5px 0 #22a06b}
.arch-lab .p25-swap .p25-tile[aria-pressed=true]{outline:3px solid var(--arch-focus);outline-offset:2px}
.arch-lab .p25-swap-note{margin:4px 0 0;min-height:1.4em}
.arch-lab .p25-picks .p25-tile{font-variant-numeric:tabular-nums;background:var(--p25-card);color:#1f2937;border-color:var(--p25-card-edge)}
.arch-lab .p25-picks .p25-tile[aria-pressed=true]{background:#fde68a;border-color:#b45309;box-shadow:inset 0 0 0 2px #b45309}
.arch-lab .p25-picks .p25-tile.p25-r0{box-shadow:inset 0 -5px 0 #3b82f6}
.arch-lab .p25-picks .p25-tile.p25-r1{box-shadow:inset 0 -5px 0 #ef6c3a}
.arch-lab .p25-picks .p25-tile.p25-r2{box-shadow:inset 0 -5px 0 #22a06b}
.arch-lab .p25-picks .p25-tile.p25-r0[aria-pressed=true],.arch-lab .p25-picks .p25-tile.p25-r1[aria-pressed=true],.arch-lab .p25-picks .p25-tile.p25-r2[aria-pressed=true]{background:#fde68a}
.arch-lab .phx-svg .p25-wood-beam{fill:var(--p25-wood);stroke:var(--arch-fig-line);stroke-width:1.2}
.arch-lab .phx-svg .p25-scale-text{fill:var(--arch-ink);stroke:none;font-weight:600}
.arch-lab .phx-svg .p25-badge{fill:var(--p25-card);stroke:var(--p25-card-edge);stroke-width:1.5}
.arch-lab .phx-svg .p25-badge-text{fill:#1f2937;font-weight:700;stroke:none}
.arch-lab .phx-svg .p25-bubble{fill:#ffffff;stroke:var(--arch-fig-line);stroke-width:1}
.arch-lab .phx-svg .p25-bubble-text{fill:#1f2937;font-size:11px;font-weight:600;stroke:none}
/* 9-II: a small table inside a lab, the laptop (dimmed screen, sun, battery, power pie), digit tiles, stone boards */
.arch-lab .p25-table{border-collapse:collapse;width:100%;font-variant-numeric:tabular-nums}
.arch-lab .p25-table caption{text-align:left;font-weight:600;padding:0 0 4px}
.arch-lab .p25-table th,.arch-lab .p25-table td{border:1px solid var(--arch-soft-line);padding:6px 8px;text-align:left}
@media (max-width:420px){.arch-lab .p25-table{font-size:14px}.arch-lab .p25-table th,.arch-lab .p25-table td{padding:5px 4px}}
.arch-lab .p25-table td.phx-secret{text-align:center}
.arch-lab .phx-svg .p25-dim{fill:#0b1220;stroke:none}
.arch-lab .phx-svg .p25-sun{fill:#facc15;stroke:#b45309;stroke-width:1}
.arch-lab .phx-svg .p25-sun-ray{stroke:#f59e0b;stroke-width:2;stroke-linecap:round}
.arch-lab .phx-svg .p25-battery{fill:var(--arch-surface);stroke:var(--arch-fig-line);stroke-width:2.5}
.arch-lab .phx-svg .p25-charge{fill:#22c55e;stroke:none}
.arch-lab .phx-svg .p25-charge-low{fill:#ef4444;stroke:none}
.arch-lab .phx-svg .p25-pie-empty{fill:none;stroke:var(--arch-fig-line);stroke-width:1.5;stroke-dasharray:4 3}
.arch-lab .phx-svg .p25-pie-rest{fill:var(--p25-shirt-a);stroke:var(--arch-fig-line);stroke-width:1}
.arch-lab .phx-svg .p25-pie-screen{fill:#facc15;stroke:var(--arch-fig-line);stroke-width:1}
.arch-lab .p25-digits .p25-tile{font-size:22px;min-width:44px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--p25-card);color:#1f2937;border-color:var(--p25-card-edge)}
.arch-lab .p25-digits .p25-tile.p25-r1{box-shadow:inset 0 -5px 0 #ef6c3a}
.arch-lab .p25-digits .p25-tile[aria-pressed=true]{outline:3px solid var(--arch-focus);outline-offset:2px;background:#fde68a}
.arch-lab .p25-digits{gap:4px}
.arch-lab .p25-pad{margin-top:4px}
.arch-lab .p25-tile-sm{font-size:18px}
.arch-lab .p25-tile[aria-disabled=true]{opacity:.45}
.arch-lab .p25-tile-wide{min-width:64px}
.arch-lab .p25-subsets{font-variant-numeric:tabular-nums;columns:2 220px;column-gap:24px}
.arch-lab .phx-svg .p25-cell-a{fill:#efe6d2;stroke:var(--p25-card-edge);stroke-width:1}
.arch-lab .phx-svg .p25-cell-b{fill:#e2d3b3;stroke:var(--p25-card-edge);stroke-width:1}
.arch-lab .phx-svg .p25-cell-sel{fill:#fde68a;stroke:#b45309;stroke-width:3}
.arch-lab .phx-svg .p25-cell-cur{fill:none;stroke:var(--arch-focus);stroke-width:3;stroke-dasharray:6 4}
.arch-lab .phx-svg .p25-g0{fill:#e5e7eb}
.arch-lab .phx-svg .p25-g1{fill:#fde68a}
.arch-lab .phx-svg .p25-g2{fill:#86efac}
/* 10-I №7: numbers in rows of five (a column = a remainder mod 5) */
.arch-lab .p25-grid5{display:grid;grid-template-columns:repeat(5,minmax(44px,1fr));gap:6px;max-width:420px}
.arch-lab .p25-tile.p25-good{border:2px solid var(--arch-good);background:var(--arch-ok-bg)}
.arch-lab .p25-tile.p25-out{border-style:dashed;opacity:.7}
.arch-lab .p25-tile.p25-now{box-shadow:0 0 0 3px var(--arch-pressed-line)}
/* 10-II: Oleg's squared notebook (the page stays paper-light in both themes, so the ink colours are fixed) */
.arch-lab .phx-svg .p25-page{fill:var(--p25-paper2);stroke:var(--p25-card-edge);stroke-width:1.2}
.arch-lab .phx-svg .p25-grid-line{stroke:#c7d7ee;stroke-width:.8}
.arch-lab .phx-svg .p25-margin-line{stroke:#ef9a9a;stroke-width:1.2}
.arch-lab .phx-svg .p25-hand{fill:#1e3a8a;stroke:none;font-size:17px;font-weight:600;font-family:"Segoe Print","Comic Sans MS","Chalkboard SE",system-ui,sans-serif}
.arch-lab .phx-svg .p25-hand-mid{fill:#047857}
.arch-lab .phx-svg .p25-mid-box{fill:none;stroke:#047857;stroke-width:2}
.arch-lab .phx-svg .p25-pair-arc{fill:none;stroke:#b45309;stroke-width:1.6}
.arch-lab .phx-svg .p25-page-note{fill:#475569;stroke:none;font-size:13px}
/* 10-II: the last digits that must be replaced, a ray from the origin, lists of checks */
.arch-lab .p25-digits .p25-tile.p25-tail{border-bottom:3px dashed #ef6c3a}
.arch-lab .phx-svg .p25-ray{stroke:var(--p25-shirt-b);stroke-width:2.2}
.arch-lab .p25-checks{font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
/* 10-II: snow under the bird feeders, the magician's spectators */
.arch-lab{--p25-snow:#eef4fb}
@media (prefers-color-scheme: dark){:root[data-design="v2"]:not([data-theme="light"]) .arch-lab{--p25-snow:#26324a}}
:root[data-design="v2"][data-theme="dark"] .arch-lab{--p25-snow:#26324a}
.arch-lab .phx-svg .p25-snow{fill:var(--p25-snow);stroke:none}
.arch-lab .p25-picks .p25-tile.p25-bad-tile{border:2px dashed var(--arch-bad)}
.arch-lab .phx-svg .p25-sel-glow{fill:#fde68a;fill-opacity:.55;stroke:#b45309;stroke-width:1.5}
.arch-lab .phx-svg .p25-sig-bad{fill:var(--arch-bad);stroke:none;font-size:13px;font-weight:700}
.arch-lab .phx-svg .p25-bubble-num{fill:var(--arch-good);stroke:none;font-size:15px;font-weight:700}
.arch-lab .p25-daychip[aria-pressed=true]{background:var(--arch-pressed-bg);border-color:var(--arch-pressed-line);font-weight:700;box-shadow:inset 0 0 0 1px var(--arch-pressed-line)}
/* Phystech 2024/25 math 11, round I */
.arch-lab .p25-tile.p25-no{border:2px dashed var(--arch-bad)}
.arch-lab .p25-tile.p25-tile-black{background:#1f2937;color:#fff;border-color:#111827}
.arch-lab .phx-svg .p25-strip{fill:var(--arch-clear);stroke:var(--arch-fig-line);stroke-width:1.5}
.arch-lab .phx-svg .p25-strip-q{fill:var(--arch-piece-b);stroke:var(--arch-fig-line);stroke-width:1.5}
.arch-lab .phx-svg .p25-strip-cut{stroke:var(--arch-fig-line);stroke-width:1.2}
.arch-lab .phx-svg .p25-strip-left{fill:var(--arch-bad);opacity:.85}
.arch-lab .phx-svg .p25-eaten{fill:var(--p25-candy-c);stroke:var(--arch-fig-line);stroke-width:1}
.arch-lab .phx-svg .p25-eaten-target{fill:var(--p25-candy-b);stroke:var(--arch-fig-line);stroke-width:1.5}
.arch-lab .phx-svg .p25-plate{stroke:var(--p25-metal);stroke-width:5;stroke-linecap:round}
.arch-lab .phx-svg .p25-gift{fill:#fde7ef;stroke:#be185d;stroke-width:2}
.arch-lab .phx-svg .p25-ribbon{fill:#ef4444;opacity:.5}
.arch-lab .phx-svg .p25-share-a{fill:var(--p25-candy-a)}
.arch-lab .phx-svg .p25-share-b{fill:var(--p25-candy-b)}
.arch-lab .phx-svg .p25-share-c{fill:var(--p25-candy-c)}
.arch-lab .phx-svg .p25-bar-frame{fill:none;stroke:var(--arch-fig-line);stroke-width:1.5}
.arch-lab .phx-svg .p25-road{fill:var(--p25-soil)}
.arch-lab .phx-svg .p25-grass-soft{fill:var(--p25-grass);opacity:.35}
.arch-lab .phx-svg .p25-roof{fill:#b45309;stroke:var(--arch-fig-line);stroke-width:1}
.arch-lab .phx-svg .p25-house-a{fill:#fde68a;stroke:var(--arch-fig-line);stroke-width:1}
.arch-lab .phx-svg .p25-house-b{fill:#fed7aa;stroke:var(--arch-fig-line);stroke-width:1;stroke-dasharray:3 2}
.arch-lab .phx-svg .p25-door,.arch-lab .phx-svg .p25-trunk{fill:#7c4a25}
.arch-lab .phx-svg .p25-crown-a{fill:#22a06b;stroke:var(--arch-fig-line);stroke-width:1}
.arch-lab .phx-svg .p25-crown-b{fill:#86c06c;stroke:var(--arch-fig-line);stroke-width:1;stroke-dasharray:3 2}
.arch-lab .phx-svg .p25-hollow{fill:#3b2414}
.arch-lab .phx-svg .p25-base{fill:var(--arch-clear);stroke:none;opacity:.85}
.arch-lab .phx-svg .p25-proj-a{stroke:var(--phx-b);stroke-width:3.5;stroke-linecap:round}
.arch-lab .phx-svg .p25-proj-b{stroke:var(--phx-c);stroke-width:3.5;stroke-linecap:round}
.arch-lab .phx-svg .p25-cell{fill:var(--arch-surface);stroke:var(--arch-soft-line);stroke-width:1}
.arch-lab .phx-svg .p25-cell-ok{fill:var(--arch-ok-bg);stroke:var(--arch-good);stroke-width:2}
.arch-lab .phx-svg .p25-cell-out{fill:var(--arch-clear);stroke:var(--arch-soft-line);stroke-dasharray:3 3}
.arch-lab .phx-svg .p25-cell-frame{fill:none;stroke:var(--arch-focus);stroke-width:3}
.arch-lab .phx-svg .p25-cell-num-sel{font-weight:700}
.arch-lab .phx-svg .p25-lens{fill:var(--arch-surface);stroke:var(--arch-fig-line);stroke-width:1.2}
.arch-lab .phx-svg .p25-lens-line{fill:none;stroke:var(--arch-muted);stroke-width:1;stroke-dasharray:4 4}
.arch-lab .phx-svg .p25-lens-mark{fill:var(--arch-accent);opacity:.2}
/* Phystech 2024/25 math 11, round II */
.arch-lab .phx-svg .p25-card-ok{fill:var(--arch-ok-bg);stroke:var(--arch-good);stroke-width:1.5}
.arch-lab .phx-svg .p25-card-no{fill:var(--arch-bad-bg);stroke:var(--arch-bad);stroke-width:1.2;stroke-dasharray:4 3}
.arch-lab .phx-svg .p25-bead{fill:#f59e0b;stroke:#92400e;stroke-width:1.2}
.arch-lab .phx-svg .p25-bead-v{fill:#60a5fa;stroke:#1e3a8a;stroke-width:1.2}
.arch-lab .phx-svg .p25-bead-text{fill:#1f2937;stroke:none;font-size:11px;font-weight:700}
.arch-lab .phx-svg .p25-string{stroke:var(--arch-fig-line);stroke-width:1.5}
.arch-lab .phx-svg .p25-cut{stroke:var(--arch-bad);stroke-width:3;stroke-linecap:round}
.arch-lab .phx-svg .p25-gap{fill:transparent;stroke:none;cursor:pointer}
.arch-lab .p25-table td.p25-yes{color:var(--arch-good);font-weight:700}
.arch-lab .p25-table td.p25-nope{color:var(--arch-bad)}
.arch-lab .p25-table tr.p25-row-now td{background:var(--arch-pressed-bg)}
.arch-lab .p25-scroll{overflow-x:auto;max-width:100%}
.arch-lab .p25-steppers{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,204px),1fr));gap:8px;min-width:0}
.arch-lab .p25-stepper{display:flex;align-items:center;gap:4px;padding:4px 6px;border:1px solid var(--arch-soft-line);border-radius:10px;background:var(--arch-surface)}
.arch-lab .p25-stepper-P{border:2px solid var(--p25-shirt-b)}
.arch-lab .p25-step-label{min-width:24px;font-weight:700;font-variant-numeric:tabular-nums}
.arch-lab input.p25-step-num{width:52px;min-width:52px;flex:0 0 52px;text-align:center;padding:8px 4px}
.arch-lab .p25-stepper .phx-step{flex:0 0 auto}
.arch-lab .phx-svg .p25-cell-add{fill:var(--p25-shirt-b);fill-opacity:.55;stroke:var(--arch-fig-line);stroke-width:1}
.arch-lab .phx-svg .p25-sq-a{fill:var(--phx-a);fill-opacity:.16;stroke:var(--phx-a);stroke-width:2}
.arch-lab .phx-svg .p25-sq-b{fill:var(--phx-b);fill-opacity:.16;stroke:var(--phx-b);stroke-width:2}
.arch-lab .phx-svg .p25-common{fill:var(--phx-c);fill-opacity:.45;stroke:var(--phx-c);stroke-width:2}
.arch-lab .phx-svg .p25-bar-a{fill:var(--phx-a);fill-opacity:.7;stroke:none}
.arch-lab .phx-svg .p25-bar-b{fill:var(--phx-b);fill-opacity:.7;stroke:none}
.arch-lab .phx-svg .p25-old-border{fill:none;stroke:var(--arch-fig-line);stroke-width:1.5;stroke-dasharray:5 4}
.arch-lab .phx-svg .p25-mark-need{fill:var(--arch-focus);stroke:none}
.arch-lab .phx-svg .p25-base-tri{fill:var(--p25-soil);fill-opacity:.35;stroke:var(--arch-fig-line);stroke-width:1.5}
.arch-lab .phx-svg .p25-face{fill:var(--phx-a);fill-opacity:.12;stroke:none}
.arch-lab .phx-svg .p25-chord{stroke:var(--phx-a);stroke-width:1.6;opacity:.75}
.arch-lab .phx-svg .p25-missing{stroke:var(--arch-bad);stroke-width:2.5;stroke-dasharray:6 5}
.arch-lab .phx-svg .p25-env-sel{fill:#fde68a;fill-opacity:.6;stroke:#b45309;stroke-width:2}
.arch-lab .p25-env-tiles .p25-tile{min-width:44px;font-variant-numeric:tabular-nums}
/* Phystech 2024/25 math 11, round III */
.arch-lab .phx-svg .p25-heat-pos{fill:var(--phx-c);stroke:none}
.arch-lab .phx-svg .p25-heat-neg{fill:var(--phx-b);stroke:none}
.arch-lab .phx-svg .p25-band-a{stroke:var(--phx-a);stroke-width:9;stroke-linecap:butt}
.arch-lab .phx-svg .p25-band-b{stroke:var(--phx-b);stroke-width:9;stroke-linecap:butt}
.arch-lab .phx-svg .p25-band-bad{stroke:var(--arch-bad);stroke-width:9;stroke-linecap:butt}
.arch-lab .phx-svg .p25-band-good{stroke:var(--arch-good);stroke-width:9;stroke-linecap:butt}
.arch-lab .phx-svg .p25-try-ok{fill:var(--arch-good);stroke:var(--arch-surface);stroke-width:1.5}
.arch-lab .phx-svg .p25-try-no{fill:var(--arch-bad);stroke:var(--arch-surface);stroke-width:1.5}
.arch-lab .phx-svg .p25-region-a{fill:var(--phx-a);fill-opacity:.28;stroke:var(--phx-a);stroke-width:1.2}
.arch-lab .phx-svg .p25-region-b{fill:var(--phx-b);fill-opacity:.28;stroke:var(--phx-b);stroke-width:1.2}
.arch-lab .phx-svg .p25-region-c{fill:var(--phx-c);fill-opacity:.28;stroke:var(--phx-c);stroke-width:1.2}
.arch-lab .phx-svg .p25-region-q{fill:var(--phx-d);fill-opacity:.12;stroke:var(--phx-d);stroke-width:1}
.arch-lab .p25-nb{border-collapse:collapse;font-variant-numeric:tabular-nums}
.arch-lab .p25-nb th{padding:4px 6px;font-weight:600;text-align:center;white-space:nowrap}
.arch-lab .p25-nb td{padding:2px}
.arch-lab .p25-nb .p25-tile{min-width:44px;min-height:44px;padding:4px}
.arch-lab .p25-nb .p25-tile[aria-pressed="true"]{border:2px solid var(--arch-good);background:var(--arch-ok-bg)}
.arch-lab .p25-nb th.p25-nb-bad,.arch-lab .p25-nb td.p25-nb-bad{background:var(--arch-bad-bg)}
/* the shared page of 9-I №5 / 10-I №5 / 11-I №4: the statement and the answer follow the chosen version (shared-page.mjs) */
.p2425-shared-now{margin:10px 0 0;font-size:.9375rem;line-height:1.5;color:var(--muted,#5b6b82)}
.p2425-answer-note{margin:10px 0 0;font-size:.9375rem;line-height:1.5}