/* Valence — "bench print": engineering grid paper, hard-edged slabs with offset ink shadows,
   and one repeating primitive — the periodic-table cell — tinted by the player's tier.
   Light and dark are both first-class; the tier colour (--tc) is the only accent. */
@import url('https://fonts.googleapis.com/css2?family=Archivo:wdth,wght@75..125,400..900&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

/* ── Tokens ─────────────────────────────────────────────────────────────── */
:root {
    color-scheme: light dark;
    --paper: #f1eee6; --surface: #fcfbf8; --surface-2: #e7e2d6; --sunk: #ffffff;
    --ink: #15171b; --ink-soft: #5b6068; --ink-faint: #8b9098;
    --line: rgba(21, 23, 27, 0.16); --line-hard: rgba(21, 23, 27, 0.3); --grid: rgba(21, 23, 27, 0.05);
    --good: #12734a; --good-bg: rgba(18, 115, 74, 0.12);
    --bad: #ab2233;  --bad-bg: rgba(171, 34, 51, 0.1);
    --shadow: rgba(21, 23, 27, 0.22);
    --tc: #8d939b;                                        /* tier colour, set inline per element */
    --tc-on: #0c0d0f;                                     /* text drawn on top of --tc */

    --font: 'Archivo', 'Helvetica Neue', Arial, sans-serif;
    --mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;
    --r: 4px;
    --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
    --spring: cubic-bezier(0.3, 1.5, 0.5, 1);
    --wide: 'wdth' 118;
}
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        color-scheme: dark;
        --paper: #0a0b0d; --surface: #15171a; --surface-2: #1f2227; --sunk: #0e1012;
        --ink: #edebe5; --ink-soft: #9aa0a9; --ink-faint: #6c727b;
        --line: rgba(255, 255, 255, 0.14); --line-hard: rgba(255, 255, 255, 0.28); --grid: rgba(255, 255, 255, 0.045);
        --good: #4ecb8c; --good-bg: rgba(78, 203, 140, 0.14);
        --bad: #ff6f7d;  --bad-bg: rgba(255, 111, 125, 0.13);
        --shadow: rgba(0, 0, 0, 0.7);
    }
}
:root[data-theme="dark"] {
    color-scheme: dark;
    --paper: #0a0b0d; --surface: #15171a; --surface-2: #1f2227; --sunk: #0e1012;
    --ink: #edebe5; --ink-soft: #9aa0a9; --ink-faint: #6c727b;
    --line: rgba(255, 255, 255, 0.14); --line-hard: rgba(255, 255, 255, 0.28); --grid: rgba(255, 255, 255, 0.045);
    --good: #4ecb8c; --good-bg: rgba(78, 203, 140, 0.14);
    --bad: #ff6f7d;  --bad-bg: rgba(255, 111, 125, 0.13);
    --shadow: rgba(0, 0, 0, 0.7);
}
/* Tier tint. Derived from --ink, so the same formula reads correctly in both themes, and
   recomputed on every element that may set its own --tc (a badge for someone else's tier). */
:root, .tint, .cell, .chip, .ladder li, .pt-key span, .tag.rated, .table tr {
    --tc-text: color-mix(in oklab, var(--tc), var(--ink) 38%);
    --tc-wash: color-mix(in oklab, var(--tc) 15%, transparent);
    --tc-edge: color-mix(in oklab, var(--tc) 55%, transparent);
}
@property --fill { syntax: '<number>'; inherits: false; initial-value: 1; }

/* ── Base ───────────────────────────────────────────────────────────────── */
* { box-sizing: border-box; }
/* Components below set display (grid/flex/inline-flex), which outranks the UA's [hidden] rule.
   .verdict is exempt: it runs its own allow-discrete display transition. */
[hidden]:not(.verdict) { display: none !important; }
body {
    margin: 0; min-height: 100svh; background: var(--paper); color: var(--ink);
    font: 400 16px/1.5 var(--font); font-synthesis: none; -webkit-font-smoothing: antialiased;
    accent-color: var(--tc); overflow-x: hidden;
}
/* Graph paper, faded toward the foot of the page, washed with the current tier colour at the top. */
body::before {
    content: ''; position: fixed; inset: 0; z-index: -2; pointer-events: none;
    background:
        radial-gradient(90% 55% at 50% -10%, var(--tc-wash), transparent 70%),
        linear-gradient(var(--grid) 1px, transparent 1px) 0 0 / 26px 26px,
        linear-gradient(90deg, var(--grid) 1px, transparent 1px) 0 0 / 26px 26px;
    mask-image: linear-gradient(#000 45%, transparent 100%);
}
body::after {   /* press grain */
    content: ''; position: fixed; inset: 0; z-index: -1; pointer-events: none; opacity: 0.035;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

h1, h2, h3 { margin: 0; font-weight: 800; font-variation-settings: var(--wide); letter-spacing: -0.02em; line-height: 1.04; }
h2.sec { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-faint);
         font-variation-settings: 'wdth' 100; display: flex; justify-content: space-between; align-items: baseline; gap: 10px; margin-bottom: 12px; }
h2.sec span { font-weight: 500; letter-spacing: 0.04em; text-transform: none; }
p { margin: 0 0 10px; }
.muted { color: var(--ink-soft); }
.faint { color: var(--ink-faint); }
.small { font-size: 0.85rem; }
.num { font-family: var(--mono); font-variant-numeric: tabular-nums; font-feature-settings: 'zero'; }
.eyebrow { font-size: 0.66rem; font-weight: 700; letter-spacing: 0.2em; text-transform: uppercase; color: var(--ink-faint); margin: 0 0 6px; }
.vh { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.error:empty { display: none; }
.error { color: var(--bad); font-size: 0.9rem; font-weight: 500; margin: 10px 0 0; }
:focus-visible { outline: 2px solid var(--tc-text); outline-offset: 2px; border-radius: 2px; }
.skip-link { position: absolute; left: 8px; top: -60px; z-index: 30; padding: 10px 16px; background: var(--ink); color: var(--paper);
        border-radius: var(--r); font-weight: 600; text-decoration: none; transition: top 0.2s; }
.skip-link:focus { top: 8px; }

/* ── Page frame ─────────────────────────────────────────────────────────── */
.chrome, main, .tabs, .foot { width: min(100% - 28px, 680px); margin-inline: auto; }
.chrome { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 18px 0 14px; }
.wordmark { display: flex; align-items: center; gap: 9px; font-weight: 800; font-size: 1.05rem; letter-spacing: 0.01em;
            font-variation-settings: var(--wide); text-transform: uppercase; }
.chrome-end { display: flex; align-items: center; gap: 8px; }
.foot { padding: 30px 0 40px; font-size: 0.76rem; color: var(--ink-faint); text-align: center; text-wrap: balance; }

/* ── Tabs ───────────────────────────────────────────────────────────────── */
.tabs { position: sticky; top: 0; z-index: 6; padding: 4px 0 10px; background: linear-gradient(var(--paper) 72%, transparent); }
.tabs ul { position: relative; display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; list-style: none; margin: 0; padding: 0;
           border: 1px solid var(--line); border-radius: var(--r); background: color-mix(in oklab, var(--surface) 80%, transparent);
           backdrop-filter: blur(8px); overflow: hidden; }
.tabs li { display: flex; }
.tabs button { flex: 1; padding: 11px 4px; border: 0; background: none; cursor: pointer; color: var(--ink-soft);
               font: 600 0.82rem var(--font); letter-spacing: 0.03em; transition: color 0.2s; }
.tabs button:hover { color: var(--ink); }
.tabs li:has([aria-current]) { anchor-name: --tab; }
.tabs li [aria-current] { color: var(--tc-text); }
.tabs ul::before { content: ''; position: absolute; position-anchor: --tab; background: var(--tc);
                   inset-block-start: calc(anchor(bottom) - 2px); inset-inline: anchor(left) anchor(right); block-size: 2px; }
@media (prefers-reduced-motion: no-preference) { .tabs ul::before { transition: inset 0.28s var(--ease); } }
@supports not (position-anchor: --tab) {
    .tabs li [aria-current] { box-shadow: inset 0 -2px 0 var(--tc); }
}

/* ── Slabs ──────────────────────────────────────────────────────────────── */
.panel { padding: 18px; margin-bottom: 14px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); }
.panel.flush { padding: 0; overflow: hidden; }
.view { animation: rise 0.4s var(--ease) both; }
.view > * { animation: rise 0.5s var(--ease) both; animation-delay: calc(var(--i, 0) * 55ms); }
@keyframes rise { from { opacity: 0; transform: translateY(10px); } }

/* ── Controls ───────────────────────────────────────────────────────────── */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 13px 20px; cursor: pointer;
    font: 600 0.95rem var(--font); color: var(--ink); background: var(--surface); border: 1px solid var(--line-hard);
    border-radius: var(--r); box-shadow: 3px 3px 0 -1px var(--shadow);
    transition: transform 0.12s var(--ease), box-shadow 0.12s var(--ease), background 0.2s, border-color 0.2s;
}
.btn:hover { background: var(--surface-2); }
.btn:active { transform: translate(3px, 3px); box-shadow: 0 0 0 0 var(--shadow); }
.btn[aria-disabled="true"], .btn:disabled { opacity: 0.45; box-shadow: none; transform: none; cursor: not-allowed; }
.btn.solid { background: var(--tc); color: var(--tc-on); border-color: color-mix(in oklab, var(--tc), black 30%); }
.btn.solid:hover { background: color-mix(in oklab, var(--tc), white 12%); }
.btn.ghost { background: none; border-color: var(--line); box-shadow: none; }
.btn.ghost:hover { background: var(--surface-2); }
.icon-btn { display: grid; place-items: center; width: 34px; height: 34px; padding: 0; cursor: pointer; font-size: 0.95rem;
            color: var(--ink-soft); background: none; border: 1px solid var(--line); border-radius: var(--r); transition: color 0.2s, border-color 0.2s; }
.icon-btn:hover { color: var(--ink); border-color: var(--line-hard); }
.link { padding: 6px 2px; background: none; border: 0; cursor: pointer; color: var(--ink-soft); font: 500 0.85rem var(--font);
        text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--line-hard); }
.link:hover { color: var(--ink); }
.row { display: flex; gap: 10px; flex-wrap: wrap; }
.row > .btn { flex: 1 1 140px; }

.field { margin-bottom: 14px; }
.field label { display: block; font-size: 0.7rem; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 6px; }
.hint { margin: 6px 0 0; font-size: 0.78rem; color: var(--ink-faint); }
input {
    width: 100%; padding: 13px 14px; color: var(--ink); background: var(--sunk);
    border: 1px solid var(--line-hard); border-radius: var(--r); outline: none;
    font: 500 1.05rem var(--font); transition: border-color 0.15s, box-shadow 0.15s;
}
input::placeholder { color: var(--ink-faint); font-weight: 400; }
input:focus { border-color: var(--tc); box-shadow: 0 0 0 3px var(--tc-wash); }
input:user-invalid { border-color: var(--bad); }

.tag { display: inline-block; padding: 3px 8px; border: 1px solid var(--line); border-radius: 2px;
       font: 600 0.62rem var(--font); letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-faint); white-space: nowrap; }
.tag.rated { color: var(--tc-text); border-color: var(--tc-edge); background: var(--tc-wash); }
.tag.lock { color: var(--ink-faint); }

/* ── The cell: the one primitive (tier badge, element, opponent, tally) ──── */
.cell {
    --size: 64px; position: relative; flex: none; display: grid; grid-template-rows: auto 1fr auto;
    width: var(--size); aspect-ratio: 1; padding: 5px 6px; border-radius: 2px; overflow: hidden;
    color: var(--tc-text); background: var(--tc-wash);
    border: 1px solid var(--tc-edge); box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--tc) 12%, transparent);
}
.cell i { font: 500 0.5rem/1 var(--mono); font-style: normal; color: currentColor; opacity: 0.75; }
.cell b { place-self: center; font: 800 calc(var(--size) * 0.42)/1 var(--font); font-variation-settings: var(--wide); letter-spacing: -0.04em; }
.cell u { font: 600 0.44rem/1.1 var(--font); text-decoration: none; letter-spacing: 0.06em; text-transform: uppercase;
          opacity: 0.75; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cell.solid { color: var(--tc-on); background: var(--tc); border-color: color-mix(in oklab, var(--tc), black 25%); }
.cell.xl { --size: 92px; }
.cell.sm { --size: 44px; }
.cell.sm u { display: none; }
.cell.xs { --size: 26px; padding: 2px; }
.cell.xs u, .cell.xs i { display: none; }
.cell .qmark { color: var(--tc); font-weight: 800; }
.cell i .qmark, .cell u .qmark { font-size: 2.1em; letter-spacing: 0; }
@media (prefers-reduced-motion: no-preference) { .cell .qmark { animation: blink 1.6s ease-in-out infinite; } }
@keyframes blink { 50% { opacity: 0.35; } }

/* ── Gate (sign in) ─────────────────────────────────────────────────────── */
.gate h1 { font-size: clamp(2.1rem, 9vw, 3.4rem); margin-bottom: 16px; }
.gate h1 em { font-style: normal; color: var(--tc-text); }
.gate .lede { max-width: 44ch; color: var(--ink-soft); font-size: 1.02rem; }
.beats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; list-style: none; margin: 22px 0; padding: 0;
         background: var(--line); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; }
.beats li { padding: 12px 10px; background: var(--surface); }
.beats b { display: block; font: 800 1.5rem/1 var(--font); font-variation-settings: var(--wide); letter-spacing: -0.03em; }
.beats span { font-size: 0.68rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-faint); }
.gate .fine { margin-top: 14px; font-size: 0.78rem; color: var(--ink-faint); text-wrap: pretty; }

/* ── Rank header ────────────────────────────────────────────────────────── */
.rank { display: flex; align-items: center; gap: 16px; }
.rank-body { flex: 1; min-width: 0; }
.tier-name { font: 800 1.3rem/1 var(--font); font-variation-settings: var(--wide); letter-spacing: -0.02em; color: var(--tc-text); margin: 0; }
.rating { display: flex; align-items: baseline; gap: 8px; margin: 4px 0 5px; }
.rating b { font: 600 2.5rem/1 var(--mono); letter-spacing: -0.04em; }
.rating .unplaced { font: 700 1rem/1.4 var(--font); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-faint); }
.record { font-family: var(--mono); font-size: 0.78rem; color: var(--ink-soft); margin: 0; }
.delta { font: 600 0.95rem var(--mono); }
.delta.up { color: var(--good); } .delta.down { color: var(--bad); }

.meter { display: flex; gap: 3px; margin: 0 0 14px; }
.meter i { flex: 1; height: 5px; border-radius: 1px; background: var(--line); }
.meter i.on { background: var(--tc); }
.meter-note { display: flex; justify-content: space-between; gap: 10px; font-size: 0.76rem; color: var(--ink-faint); margin: -8px 0 14px; }

/* ── Mode picker ────────────────────────────────────────────────────────── */
.cta { display: flex; align-items: center; gap: 14px; width: 100%; padding: 18px; margin-bottom: 12px; text-align: left; cursor: pointer;
       color: var(--tc-on); background: var(--tc); border: 1px solid color-mix(in oklab, var(--tc), black 30%); border-radius: var(--r);
       box-shadow: 5px 5px 0 -1px var(--shadow); transition: transform 0.12s var(--ease), box-shadow 0.12s var(--ease); }
.cta:hover { background: color-mix(in oklab, var(--tc), white 10%); }
.cta:active { transform: translate(5px, 5px); box-shadow: 0 0 0 0 var(--shadow); }
.cta:disabled { opacity: 0.5; cursor: wait; }
.cta b { display: block; font: 800 1.35rem/1.1 var(--font); font-variation-settings: var(--wide); letter-spacing: -0.02em; }
.cta span { display: block; margin-top: 3px; font-size: 0.82rem; opacity: 0.78; }
.cta .arrow { margin-left: auto; font-size: 1.3rem; transition: translate 0.25s var(--spring); }
.cta:hover .arrow { translate: 4px 0; }

.modes { display: grid; gap: 8px; list-style: none; margin: 0 0 4px; padding: 0; }
.modes button { display: flex; align-items: center; gap: 12px; width: 100%; padding: 13px 14px; text-align: left; cursor: pointer;
                color: inherit; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); font-family: var(--font);
                transition: border-color 0.18s, background 0.18s, translate 0.18s var(--ease); }
.modes button:hover { border-color: var(--tc-edge); background: color-mix(in oklab, var(--surface), var(--tc) 6%); translate: 0 -1px; }
.modes button[aria-disabled="true"] { opacity: 0.62; }
.modes button[aria-disabled="true"]:hover { border-color: var(--line); background: var(--surface); translate: 0; }
.modes .k { display: block; font-weight: 700; font-size: 0.98rem; }
.modes .d { display: block; font-size: 0.8rem; color: var(--ink-soft); margin-top: 1px; }
.modes .grow { flex: 1; min-width: 0; }

/* ── Lists, feeds, tables ───────────────────────────────────────────────── */
.feed { list-style: none; margin: 0; padding: 0; }
.feed li { display: flex; align-items: center; gap: 12px; padding: 11px 0; border-top: 1px solid var(--line); font-size: 0.9rem; }
.feed li:first-child { border-top: 0; }
.feed .grow { flex: 1; min-width: 0; }
.feed .who { font-weight: 600; }
.feed .meta { display: block; font-size: 0.74rem; color: var(--ink-faint); margin-top: 1px; }
.feed .out { font: 700 0.7rem var(--font); letter-spacing: 0.12em; text-transform: uppercase; text-align: right; }
.feed .out span { display: block; font: 400 0.74rem var(--mono); letter-spacing: 0; text-transform: none; color: var(--ink-faint); }
.empty { padding: 18px 2px; color: var(--ink-faint); font-size: 0.88rem; text-wrap: pretty; }

.table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.table caption { text-align: left; font-size: 0.78rem; color: var(--ink-faint); padding-bottom: 10px; }
.table th { text-align: left; padding: 0 8px 8px; font: 700 0.62rem var(--font); letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-faint); }
.table td { padding: 9px 8px; border-top: 1px solid var(--line); }
.table td:first-child, .table th:first-child { padding-left: 0; }
.table td:last-child, .table th:last-child { padding-right: 0; text-align: right; }
.table td.empty { text-align: left; padding: 16px 0; }
.table .pos { font: 600 0.85rem var(--mono); color: var(--ink-faint); width: 1%; }
.table tr.me td { background: var(--tc-wash); }
.table tr.me .who { color: var(--tc-text); font-weight: 700; }
.table .tier-cell { display: flex; align-items: center; gap: 8px; white-space: nowrap; }

.ladder { display: grid; gap: 6px; list-style: none; margin: 0; padding: 0; }
.ladder li { display: flex; align-items: center; gap: 11px; padding: 7px 9px; border: 1px solid transparent; border-radius: var(--r); }
.ladder li.here { border-color: var(--tc-edge); background: var(--tc-wash); }
.ladder .n { font-weight: 700; font-size: 0.92rem; }
.ladder .r { margin-left: auto; font: 400 0.76rem var(--mono); color: var(--ink-faint); }

.badges { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 4px 9px; border: 1px solid var(--tc-edge); border-radius: 2px;
        background: var(--tc-wash); color: var(--tc-text); font: 600 0.74rem var(--font); }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line);
         border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; margin-bottom: 14px; }
.stats div { padding: 11px 12px; background: var(--surface); }
.stats b { display: block; font: 600 1.35rem/1.1 var(--mono); }
.stats span { font-size: 0.64rem; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-faint); }

@media (min-width: 560px) { .stats { grid-template-columns: repeat(6, 1fr); } }

/* ── Drills ─────────────────────────────────────────────────────────────── */
/* ── Subject picker ─────────────────────────────────────────────────────── */
.subjects { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; gap: 8px; margin-bottom: 14px; }
.subj { display: flex; flex-direction: column; gap: 2px; padding: 10px 12px; text-align: left; cursor: pointer;
        color: var(--ink-soft); background: var(--surface); border: 1px solid var(--line); border-radius: var(--r);
        font-family: var(--font); transition: border-color 0.18s, background 0.18s, color 0.18s; }
.subj:hover { border-color: var(--tc-edge); }
.subj b { font-size: 0.94rem; font-weight: 700; }
.subj span { font-size: 0.76rem; color: var(--ink-faint); text-wrap: pretty; }
.subj[aria-pressed="true"] { color: var(--tc-text); border-color: var(--tc-edge); background: var(--tc-wash); }
.subj[aria-pressed="true"] span { color: var(--tc-text); opacity: 0.75; }
@media (max-width: 380px) { .subjects { grid-auto-flow: row; } }

.topics { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 8px; }
.topic { display: flex; flex-direction: column; align-items: flex-start; gap: 3px; padding: 14px; text-align: left; cursor: pointer;
         color: inherit; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); font-family: var(--font);
         transition: border-color 0.18s, background 0.18s, translate 0.18s var(--ease); }
.topic:hover { border-color: var(--tc-edge); background: color-mix(in oklab, var(--surface), var(--tc) 6%); translate: 0 -2px; }
.topic:disabled { opacity: 0.5; cursor: not-allowed; translate: 0; }
.topic b { font-size: 0.98rem; font-weight: 700; }
.topic span { font-size: 0.8rem; color: var(--ink-soft); text-wrap: pretty; }
.topic .tag { margin-top: 7px; }

/* ── Queue ──────────────────────────────────────────────────────────────── */
.queue { text-align: center; padding: 40px 18px; }
.sonar { width: 74px; height: 74px; margin: 0 auto 22px; border-radius: 50%; border: 2px solid var(--tc); position: relative; }
.sonar::before, .sonar::after { content: ''; position: absolute; inset: -2px; border-radius: 50%; border: 2px solid var(--tc); animation: sonar 2s ease-out infinite; }
.sonar::after { animation-delay: 1s; }
@keyframes sonar { to { transform: scale(2.1); opacity: 0; } }

/* ── Duel ───────────────────────────────────────────────────────────────── */
.duel { padding-top: 4px; }
.clock { height: 6px; border: 1px solid var(--line); border-radius: 2px; overflow: hidden; background: var(--sunk); }
.clock i { display: block; height: 100%; background: var(--tc); transform-origin: left; transform: scaleX(var(--fill, 1)); }
.clock.urgent i { background: var(--bad); }
.duel-head { display: flex; align-items: center; gap: 10px; margin: 10px 0 12px; }
.duel-head .q-index { font: 600 0.8rem var(--mono); color: var(--ink-soft); }
.duel-head .q-index b { color: var(--ink); font-weight: 600; }
.secs { margin-left: auto; font: 600 1.45rem/1 var(--mono); font-variant-numeric: tabular-nums; letter-spacing: -0.03em; }
.secs.urgent { color: var(--bad); }
@media (prefers-reduced-motion: no-preference) { .secs.urgent { animation: tickpulse 1s steps(2, end) infinite; } }
@keyframes tickpulse { 50% { opacity: 0.45; } }

.q-panel { padding: 24px 20px; }
.ask { text-wrap: balance; margin: 0 0 18px; }
.ask .lead { display: block; font: 500 0.76rem var(--font); letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 5px; }
/* No text-transform here: the ask labels are already lower case in the question bank, and this line
   also carries opponent names, which must keep the case the player chose. */
.ask .k { display: block; font-size: clamp(1.7rem, 7vw, 2.5rem); font-weight: 800; font-variation-settings: var(--wide);
          letter-spacing: -0.03em; color: var(--tc-text); }
.subject { display: flex; align-items: center; gap: 12px; margin: 0 0 20px; }
.subject .of { font: 500 0.76rem var(--font); letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-faint); }
/* The question cell is the hero: whichever slot holds the given value has to be read at a glance. */
.subject .cell { --size: 108px; padding: 7px 9px; }
.subject .cell i { font-size: 0.74rem; opacity: 1; }
.subject .cell u { font-size: 0.6rem; opacity: 1; }
.formula.given-data { font-size: clamp(0.9rem, 3.4vw, 1.15rem); font-family: var(--font); text-wrap: pretty; }
.formula { padding: 9px 14px; border: 1px solid var(--tc-edge); border-radius: var(--r); background: var(--tc-wash);
           font: 500 clamp(1.3rem, 5.5vw, 1.9rem) var(--mono); letter-spacing: -0.01em; color: var(--ink); overflow-wrap: anywhere; }
.q-form .row { margin-top: 12px; }
.q-form .row .btn { flex: 1 1 0; }
.q-form .btn.skip { flex: 0 0 auto; }
#q-input { font-size: 1.25rem; padding: 15px 16px; }
.verdict { display: flex; align-items: center; gap: 10px; margin: 14px 0 0; padding: 10px 13px; border-radius: var(--r);
           font-size: 0.92rem; font-weight: 500; border: 1px solid var(--line);
           transition: opacity 0.3s, translate 0.35s var(--spring), display 0.3s; transition-behavior: allow-discrete; }
.verdict[hidden] { display: none; opacity: 0; translate: 0 6px; }
@starting-style { .verdict { opacity: 0; translate: 0 6px; } }
.verdict.ok { color: var(--good); border-color: color-mix(in oklab, var(--good) 40%, transparent); background: var(--good-bg); }
.verdict.no { color: var(--bad);  border-color: color-mix(in oklab, var(--bad) 40%, transparent);  background: var(--bad-bg); }
.verdict b { font-weight: 700; }
.verdict .key { margin-left: auto; font-family: var(--mono); font-size: 0.8rem; color: var(--ink-soft); text-align: right; }

.tally { display: grid; gap: 10px; }
.tally-row { display: flex; align-items: center; gap: 12px; }
.tally-row .who { width: 74px; flex: none; font: 700 0.7rem var(--font); letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-faint); }
.tally-row .who b { display: block; font: 400 0.68rem var(--mono); letter-spacing: 0; text-transform: none; color: var(--ink-faint); }
.pips { display: flex; gap: 3px; flex: 1; flex-wrap: wrap; }
.pips i { width: 100%; max-width: 16px; aspect-ratio: 1; flex: 1 1 10px; border-radius: 1px; background: var(--line); }
.pips i.ok { background: var(--good); }
.pips i.no { background: var(--bad); }
@media (prefers-reduced-motion: no-preference) { .pips i.ok, .pips i.no { animation: pip 0.4s var(--spring); } }
@keyframes pip { from { transform: scale(0.2); } }
.tally-row .pts { font: 600 0.95rem var(--mono); width: 62px; text-align: right; flex: none; }

/* ── Result ─────────────────────────────────────────────────────────────── */
.verdict-hero { text-align: center; padding: 30px 20px 24px; }
.verdict-hero h1 { font-size: clamp(2.6rem, 13vw, 4.2rem); font-weight: 900; font-variation-settings: 'wdth' 125;
                   letter-spacing: -0.05em; text-transform: uppercase; animation: stamp 0.5s var(--spring) both; }
.verdict-hero h1.win { color: var(--good); } .verdict-hero h1.loss { color: var(--bad); } .verdict-hero h1.draw { color: var(--ink-soft); }
@keyframes stamp { from { opacity: 0; transform: scale(1.35); } }
.verdict-hero .cell { margin: 16px auto 10px; }
.scoreline { display: flex; align-items: center; justify-content: center; gap: 22px; margin: 18px 0 6px; }
.scoreline div { min-width: 92px; }
.scoreline .vs { min-width: 0; }
.scoreline b { display: block; font: 600 2.2rem/1 var(--mono); letter-spacing: -0.04em; }
.scoreline span { display: block; margin-top: 5px; font-size: 0.74rem; font-weight: 500; letter-spacing: 0.04em; color: var(--ink-faint); }
.scoreline .vs { font: 700 0.7rem var(--font); letter-spacing: 0.14em; color: var(--ink-faint); }

.review { list-style: none; margin: 0; padding: 0; }
.review li { padding: 13px 0; border-top: 1px solid var(--line); animation: rise 0.4s var(--ease) both; animation-delay: calc(var(--i, 0) * 35ms); }
.review li:first-child { border-top: 0; }
.review .q { display: flex; align-items: baseline; gap: 8px; font-size: 0.9rem; }
.review .q .n { font: 500 0.72rem var(--mono); color: var(--ink-faint); width: 22px; flex: none; }
.review .key { margin: 6px 0 0 30px; font-family: var(--mono); font-size: 0.92rem; font-weight: 500; }
.review .sub { margin: 2px 0 0 30px; font-size: 0.76rem; color: var(--ink-faint); }
.review .marks { display: flex; gap: 14px; margin: 7px 0 0 30px; font-size: 0.76rem; font-family: var(--mono); }
.review .mark.ok { color: var(--good); } .review .mark.no { color: var(--bad); }
.review .mark s { color: var(--ink-faint); text-decoration-color: var(--bad); }

/* ── Confirm ────────────────────────────────────────────────────────────── */
.confirm { width: min(92vw, 380px); padding: 22px; color: var(--ink); background: var(--surface);
           border: 1px solid var(--line-hard); border-radius: var(--r); box-shadow: 0 30px 70px -20px var(--shadow); }
.confirm::backdrop { background: color-mix(in srgb, var(--paper) 60%, transparent); backdrop-filter: blur(4px); }
.confirm h2 { font-size: 1.2rem; margin-bottom: 8px; }
.confirm p { font-size: 0.9rem; text-wrap: pretty; }
.confirm .row { margin-top: 18px; }

/* ── Periodic table ─────────────────────────────────────────────────────── */
.fab { position: fixed; right: 16px; bottom: max(16px, env(safe-area-inset-bottom)); z-index: 5; display: grid; place-items: center; width: 48px; height: 48px; cursor: pointer;
       font-size: 0.62rem; font-weight: 700; letter-spacing: 0.06em; color: var(--ink); background: var(--surface);
       border: 1px solid var(--line-hard); border-radius: var(--r); box-shadow: 3px 3px 0 -1px var(--shadow);
       transition: transform 0.12s var(--ease), box-shadow 0.12s var(--ease); }
.fab:active { transform: translate(3px, 3px); box-shadow: none; }
.pt-dialog { width: min(96vw, 1060px); max-height: 90svh; padding: 0; color: var(--ink); background: var(--surface);
             border: 1px solid var(--line-hard); border-radius: var(--r); box-shadow: 0 30px 70px -20px var(--shadow); }
.pt-dialog::backdrop { background: color-mix(in srgb, var(--paper) 55%, transparent); backdrop-filter: blur(4px); }
.pt-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 16px; border-bottom: 1px solid var(--line); }
.pt-head h2 { font-size: 0.96rem; }
.pt-scroll { overflow: auto; padding: 14px; scrollbar-width: thin; }
.pt { display: grid; grid-template-columns: repeat(18, minmax(42px, 1fr)); gap: 2px; min-width: 860px; }
.pt .cell { --size: auto; width: auto; transition: transform 0.2s var(--spring), z-index 0s; }
.pt .cell:hover { transform: scale(1.3); z-index: 2; }
.pt-key { display: flex; flex-wrap: wrap; gap: 12px; padding: 0 16px 14px; font-size: 0.72rem; color: var(--ink-faint); }
.pt-key span::before { content: ''; display: inline-block; width: 9px; height: 9px; margin-right: 5px; border-radius: 1px; background: var(--tc); }

/* ── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 360px) {
    .beats { grid-template-columns: 1fr; }
}
@media (max-width: 460px) {
    .topics { grid-template-columns: 1fr; }
    .rank { gap: 12px; }
    .cell.xl { --size: 74px; }
    .tally-row .who { width: 56px; }
    .table .hide-s { display: none; }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}
::selection { background: var(--tc); color: var(--tc-on); }