/* IQ Puzzle Trainer, on the site. Loaded only on the Puzzles page.
   The app's own colour names, mapped onto the site's tokens, so the page follows
   the site's design (and the BBS design, which redefines the same tokens). */
.iq {
  --paper: var(--bg); --sheet: var(--surface); --ink: var(--text); --ink-soft: var(--muted); --ink-faint: var(--faint);
  --rule: var(--line); --rule-strong: var(--line-strong); --tone: color-mix(in srgb, var(--muted) 55%, var(--surface));
  --mark: var(--accent); --mark-soft: var(--accent-soft); --mark-ink: var(--bg);
  --ok: var(--allow); --ok-soft: var(--allow-soft); --bad: var(--red); --bad-soft: var(--red-soft);
  --shadow: rgba(0, 0, 0, 0.55);
  --display: var(--sans); --body: var(--sans);
}
.iq button { font: inherit; color: inherit; }
.iq :focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
.iq h1, .iq h2, .iq h3 { text-wrap: balance; }


/* ---------- header ---------- */
.iq .top { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 22px; padding-block: 6px 12px; border-bottom: 1px solid var(--rule); margin-bottom: 18px; }
.iq .tabs { display: flex; gap: 2px; }
.iq .tab { appearance: none; border: 0; background: none; padding: 9px 13px 11px; font: 650 15px/1 var(--display); font-stretch: 108%; color: var(--ink-soft); cursor: pointer; position: relative; border-radius: 7px; }
.iq .tab:hover { color: var(--ink); background: var(--hover); }
.iq .tab[aria-selected="true"] { color: var(--ink); }
.iq .tab[aria-selected="true"]::after { content: ""; position: absolute; left: 11px; right: 11px; bottom: 3px; height: 5px; background: var(--mark); border-radius: 2px; transform: skewX(-14deg); }
.iq .save-state { display: inline-flex; align-items: center; gap: 7px; font: 500 12px/1.3 var(--mono); color: var(--ink-soft); white-space: nowrap; }
.iq .save-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ink-faint); flex: none; }
.iq .save-state[data-mode="account"] .save-dot { background: var(--ok); }
.iq .save-state[data-mode="memory"] .save-dot { background: var(--bad); }
@media (max-width: 700px) {

  .iq .tabs { order: 3; width: 100%; }
  .iq .tab { flex: 1; text-align: center; }
}

/* ---------- shared bits ---------- */
.iq .eyebrow { font: 600 12px/1.3 var(--mono); text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-soft); margin: 0 0 10px; }
.iq .btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; border: 1.5px solid var(--rule-strong); background: var(--sheet); color: var(--ink); padding: 10px 16px; border-radius: 9px; font: 700 15px/1.2 var(--body); cursor: pointer; text-decoration: none; }
.iq .btn:hover { border-color: var(--ink); }
.iq .btn-primary { background: var(--mark); border-color: var(--mark); color: var(--mark-ink); }
.iq .btn-primary:hover { border-color: var(--ink); }
.iq .btn-danger { border-color: var(--bad); color: var(--bad); }
.iq .btn-quiet { border: 0; background: none; padding: 4px 0; color: var(--ink-soft); font: 600 14px/1.3 var(--body); text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }
.iq .btn-quiet:hover { color: var(--ink); }
.iq kbd { font: 500 11px/1 var(--mono); padding: 3px 5px; border: 1px solid currentColor; border-radius: 4px; opacity: 0.75; }
.iq .iq-muted { color: var(--ink-soft); }
.iq .nums { font-variant-numeric: tabular-nums; }

/* ---------- practice controls ---------- */
.iq .iq-controls { display: flex; flex-wrap: wrap; gap: 10px 20px; align-items: center; margin-bottom: 16px; }
.iq .chips { display: flex; flex-wrap: wrap; gap: 6px; }
.iq .chip { border: 1px solid var(--rule-strong); background: var(--sheet); padding: 7px 12px; border-radius: 7px; font: 700 14px/1.2 var(--body); cursor: pointer; color: var(--ink-soft); }
.iq .chip:hover { border-color: var(--ink-soft); color: var(--ink); }
.iq .chip[aria-checked="true"] { background: var(--ink); color: var(--sheet); border-color: var(--ink); }
.iq .seg { display: inline-flex; border: 1px solid var(--rule-strong); border-radius: 7px; overflow: hidden; background: var(--sheet); }
.iq .seg button { border: 0; background: none; padding: 7px 12px; font: 700 14px/1.2 var(--body); color: var(--ink-soft); cursor: pointer; }
.iq .seg button + button { border-left: 1px solid var(--rule); }
.iq .seg button:hover { color: var(--ink); background: var(--hover); }
.iq .seg button[aria-checked="true"] { background: var(--mark); color: var(--mark-ink); }
.iq .seg-label { font: 600 12px/1 var(--mono); text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-soft); margin-right: 8px; }
.iq .diff { display: inline-flex; align-items: center; flex-wrap: wrap; gap: 6px; }

/* ---------- workspace ---------- */
.iq .workspace { display: grid; gap: 20px; grid-template-columns: minmax(0, 1fr); align-items: start; }
@media (min-width: 980px) {
 .iq .workspace { grid-template-columns: minmax(0, 1fr) 320px; gap: 26px; } }
.iq .sheet { container: sheet / inline-size; background: var(--sheet); border: 1px solid var(--rule); border-radius: 14px; padding: clamp(16px, 3vw, 28px); min-width: 0; box-shadow: 0 1px 0 var(--rule), 0 18px 36px -30px var(--shadow); }
.iq .item-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 14px; font: 500 12px/1.4 var(--mono); text-transform: uppercase; letter-spacing: 0.07em; color: var(--ink-soft); padding-bottom: 11px; border-bottom: 1px dashed var(--rule-strong); margin-bottom: 16px; }
.iq .item-no { color: var(--ink); font-weight: 600; }
.iq .item-clock { margin-left: auto; font-variant-numeric: tabular-nums; color: var(--ink); }
.iq .prompt { font: 700 clamp(17px, 2.1vw, 20px)/1.35 var(--body); margin: 0 0 16px; text-wrap: balance; max-width: 60ch; }
.iq .item-body { display: grid; gap: 20px; grid-template-columns: minmax(0, 1fr); }
.iq .stem, .iq .answers { min-width: 0; }
@container sheet (min-width: 680px) {

  .iq .item-body.is-matrix { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: center; gap: 24px; }
}
.iq .item-foot { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 16px; margin-top: 16px; align-items: center; }
.iq .hint-keys { font: 500 12px/1.3 var(--mono); color: var(--ink-faint); }

/* stems */
.iq .matrix { width: 100%; max-width: 420px; }
.iq .iq-fig, .iq .mx { display: block; width: 100%; height: auto; }
.iq .fe { fill: var(--sheet); stroke: var(--ink); stroke-width: 2.4; stroke-linejoin: round; }
.iq .fg { fill: var(--tone); stroke: var(--ink); stroke-width: 2.4; stroke-linejoin: round; }
.iq .fs { fill: var(--ink); stroke: var(--ink); stroke-width: 2.4; stroke-linejoin: round; }
.iq .fl { fill: none; stroke: var(--ink); stroke-width: 2.6; stroke-linejoin: round; }
.iq .fi { fill: var(--ink); }
.iq .hand { stroke: var(--ink); stroke-width: 3.6; stroke-linecap: round; }
.iq .spoke { stroke: var(--ink); stroke-width: 3.8; stroke-linecap: round; }
.iq .mx-bg { fill: var(--sheet); }
.iq .mx-grid { stroke: var(--rule-strong); stroke-width: 1.5; fill: none; }
.iq .mx-frame { fill: none; stroke: var(--rule-strong); stroke-width: 2; }
.iq .mx-q { fill: var(--mark-soft); stroke: var(--ink-soft); stroke-width: 1.6; stroke-dasharray: 5 4; }
.iq .mx-qt { font: 700 40px var(--display); fill: var(--ink-soft); }
.iq .series { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 0; }
.iq .iq-term { min-width: 3.1em; padding: 11px 12px; border: 1.5px solid var(--rule-strong); border-radius: 8px; background: var(--sheet); font: 700 clamp(20px, 3vw, 26px)/1 var(--display); font-stretch: 108%; text-align: center; font-variant-numeric: tabular-nums; }
.iq .iq-term.is-blank, .iq .code-w.is-blank { background: var(--mark-soft); border: 1.5px dashed var(--ink-soft); color: var(--ink-soft); }
.iq .series.is-letters .iq-term { min-width: 2.4em; }
.iq .iq-code { display: grid; gap: 10px; }
.iq .code-row { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
.iq .code-w { font: 600 clamp(19px, 2.6vw, 24px)/1 var(--mono); letter-spacing: 0.18em; padding: 10px 12px 10px 14px; border: 1.5px solid var(--rule-strong); border-radius: 8px; background: var(--sheet); }
.iq .code-arrow { color: var(--ink-faint); font-size: 20px; }
.iq .clues { max-width: 62ch; }
.iq .clue-intro { margin: 0 0 12px; color: var(--ink-soft); }
.iq .clue-list { margin: 0; padding: 0; list-style: none; counter-reset: clue; display: grid; gap: 8px; }
.iq .clue-list li { counter-increment: clue; display: grid; grid-template-columns: 1.9em minmax(0, 1fr); gap: 6px; font-size: 17px; line-height: 1.45; }
.iq .clue-list li::before { content: counter(clue); font: 600 12px/1.9 var(--mono); color: var(--ink-faint); text-align: right; padding-right: 4px; border-right: 1px solid var(--rule); }

/* answer options */
.iq .answers { display: grid; gap: 10px; }
.iq .answers.is-matrix { grid-template-columns: repeat(4, minmax(0, 1fr)); max-width: 520px; gap: 8px; }
.iq .answers.is-figs { grid-template-columns: repeat(5, minmax(0, 1fr)); max-width: 620px; }
.iq .answers.is-short { display: flex; flex-wrap: wrap; max-width: 660px; }
.iq .answers.is-short .opt { flex: 1 0 auto; min-width: 96px; padding: 10px 12px; gap: 10px; }
.iq .answers.is-list { grid-template-columns: minmax(0, 1fr); max-width: 640px; }
.iq .opt { position: relative; display: flex; align-items: center; gap: 12px; border: 1.5px solid var(--rule-strong); background: var(--sheet); border-radius: 10px; padding: 11px 14px; text-align: left; cursor: pointer; min-width: 0; transition: border-color 0.12s, background-color 0.12s, opacity 0.12s; }
.iq .opt:hover:not(:disabled) { border-color: var(--ink); background: var(--hover); }
.iq .answers.is-matrix .opt, .iq .answers.is-figs .opt { flex-direction: column; gap: 5px; padding: 5px 4px 7px; }

.iq .opt-fig { display: block; width: 100%; }
.iq .opt-text { font: 700 17px/1.35 var(--body); min-width: 0; }
.iq .answers.is-short .opt-text { font: 700 21px/1 var(--display); font-stretch: 106%; font-variant-numeric: tabular-nums; }
.iq .answers.is-big .opt-text { font-size: 25px; }
.iq .bubble { flex: none; width: 24px; height: 24px; border-radius: 50%; border: 1.5px solid var(--ink-soft); display: grid; place-items: center; font: 600 12px/1 var(--mono); color: var(--ink-soft); background: var(--sheet); }
.iq .answers.is-matrix .bubble, .iq .answers.is-figs .bubble { width: 21px; height: 21px; font-size: 11px; }
.iq .opt[aria-pressed="true"] { border-color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); }
.iq .opt[aria-pressed="true"] .bubble { background: var(--ink); border-color: var(--ink); color: var(--sheet); }
.iq .opt.is-correct { border-color: var(--ok); background: var(--ok-soft); box-shadow: inset 0 0 0 1px var(--ok); }
.iq .opt.is-correct .bubble { background: var(--ok); border-color: var(--ok); color: var(--sheet); }
.iq .opt.is-wrong { border-color: var(--bad); background: var(--bad-soft); }
.iq .opt.is-wrong .bubble { background: var(--bad); border-color: var(--bad); color: var(--sheet); }
.iq .opt.is-dim { opacity: 0.5; }
.iq .opt:disabled { cursor: default; }

/* rail */
.iq .rail { display: grid; gap: 16px; min-width: 0; }
.iq .panel { padding: 16px 0 0; border-top: 1px solid var(--rule); }
.iq .feedback { background: var(--sheet); border: 1px solid var(--rule); border-radius: 14px; padding: 18px 18px 20px; box-shadow: 0 18px 36px -30px var(--shadow); }
.iq .verdict { display: flex; align-items: center; gap: 10px; margin: 0 0 12px; font: 800 21px/1.15 var(--display); font-stretch: 112%; }
.iq .verdict-badge { flex: none; width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; background: var(--ok); color: var(--sheet); animation: stamp 0.28s ease-out; }
.iq .verdict-badge svg { width: 16px; height: 16px; }
.iq .is-bad .verdict-badge { background: var(--bad); }
.iq .verdict-time { margin-left: auto; font: 500 12px/1 var(--mono); color: var(--ink-soft); font-variant-numeric: tabular-nums; }
@keyframes stamp { from { transform: scale(0.4); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.iq .your-choice { margin: 0 0 12px; padding: 10px 12px; border-radius: 8px; background: var(--bad-soft); font-size: 15px; }
.iq .fb-h { font: 600 12px/1.3 var(--mono); text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-soft); margin: 14px 0 8px; }
.iq .fb-lines { margin: 0; padding-left: 18px; display: grid; gap: 7px; font-size: 15px; }
.iq .fb-result { margin: 12px 0 0; font-weight: 700; font-size: 15px; }
.iq .fb-tip { margin: 14px 0 0; padding-top: 12px; border-top: 1px dashed var(--rule-strong); font-size: 14px; color: var(--ink-soft); }
.iq .fb-tip b { color: var(--ink); }
.iq .fb-level { margin: 12px 0 0; padding: 9px 12px; border-radius: 8px; background: var(--mark-soft); font-size: 14px; font-weight: 700; }
.iq .fb-actions { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.iq .tally { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.iq .tally div { display: grid; gap: 3px; }
.iq .tally b { font: 800 26px/1 var(--display); font-stretch: 115%; font-variant-numeric: tabular-nums; }
.iq .tally span { font-size: 13px; color: var(--ink-soft); }
.iq .levels { display: grid; gap: 10px; list-style: none; margin: 0; padding: 0; }
.iq .levels li { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 2px 10px; align-items: center; font-size: 14px; }
.iq .levels li.is-current { font-weight: 700; }
.iq .meter { display: inline-flex; gap: 3px; }
.iq .meter i { width: 16px; height: 8px; border-radius: 2px; background: var(--rule); }
.iq .meter i.iq-on { background: var(--ink); }
.iq .levels .lv-note { grid-column: 1 / -1; font-size: 12px; color: var(--ink-faint); }
.iq .rail-note { margin: 10px 0 0; font-size: 13px; color: var(--ink-soft); }
.iq .iq-keys { display: grid; gap: 6px; font-size: 13px; color: var(--ink-soft); }
.iq .iq-keys div { display: flex; gap: 8px; align-items: center; }
/* no keyboard on a touch screen: after the rules above, which would otherwise win */
@media (hover: none) {
 .iq .hint-keys, .iq .iq-keys { display: none; } }

/* ---------- test ---------- */
.iq .test-start-intro { max-width: 62ch; margin: 0 0 20px; }
.iq .test-start-intro h2 { font: 800 clamp(26px, 4vw, 36px)/1.05 var(--display); font-stretch: 118%; margin: 0 0 10px; letter-spacing: -0.01em; }
.iq .test-start-intro p { margin: 0; color: var(--ink-soft); }
.iq .formats { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.iq .format { display: grid; gap: 10px; align-content: start; padding: 18px; border: 1px solid var(--rule); border-radius: 14px; background: var(--sheet); }
.iq .format h2 { margin: 0; font: 800 20px/1.15 var(--display); font-stretch: 112%; }
.iq .format-spec { font: 500 13px/1.3 var(--mono); color: var(--ink-soft); }
.iq .format p { margin: 0; font-size: 15px; }
.iq .format-best { font-size: 13px; color: var(--ink-soft); }
.iq .format .btn { justify-self: start; margin-top: 4px; }
.iq .test-rules { margin: 20px 0 0; padding: 0; list-style: none; display: grid; gap: 6px; max-width: 70ch; font-size: 14px; color: var(--ink-soft); }
.iq .test-rules li::before { content: "– "; }
.iq .test-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 18px; margin-bottom: 14px; }
.iq .test-name { font: 800 18px/1.1 var(--display); font-stretch: 112%; margin-right: auto; }
.iq .test-count { font: 500 13px/1 var(--mono); color: var(--ink-soft); }
.iq .test-clock { font: 700 26px/1 var(--display); font-stretch: 112%; font-variant-numeric: tabular-nums; padding: 6px 12px; border-radius: 8px; border: 1.5px solid var(--rule-strong); background: var(--sheet); }
.iq .test-clock.is-low { border-color: var(--bad); color: var(--bad); }
.iq .test-nav { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; align-items: center; }
.iq .test-nav .spacer { flex: 1; }
.iq .sheet-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(34px, 1fr)); gap: 8px; }
.iq .sheet-cell { width: 34px; height: 34px; border-radius: 50%; border: 1.5px solid var(--ink-soft); background: var(--sheet); display: grid; place-items: center; font: 600 12px/1 var(--mono); color: var(--ink-soft); cursor: pointer; padding: 0; }
.iq .sheet-cell.is-answered { background: var(--ink); border-color: var(--ink); color: var(--sheet); }
.iq .sheet-cell.is-current { box-shadow: 0 0 0 3px var(--mark); }
.iq .confirm { margin-top: 14px; padding: 12px 14px; border-radius: 10px; background: var(--mark-soft); display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.iq .confirm p { margin: 0; flex: 1 1 220px; font-weight: 700; font-size: 15px; }

/* results */
.iq .results-head { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 10px 28px; margin-bottom: 8px; }
.iq .score-big { font: 800 clamp(52px, 9vw, 76px)/0.9 var(--display); font-stretch: 122%; font-variant-numeric: tabular-nums; letter-spacing: -0.02em; }
.iq .score-big small { font-size: 0.45em; color: var(--ink-soft); font-stretch: 110%; }
.iq .score-meta { display: grid; gap: 4px; padding-bottom: 6px; }
.iq .score-meta b { font: 800 20px/1.1 var(--display); font-stretch: 110%; }
.iq .score-meta span { font: 500 13px/1.3 var(--mono); color: var(--ink-soft); }
.iq .score-note { max-width: 66ch; font-size: 14px; color: var(--ink-soft); margin: 10px 0 22px; }
.iq .split { display: grid; gap: 24px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 900px) {
 .iq .split { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } }
.iq .bars { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.iq .bars li { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 5px 10px; font-size: 14px; }
.iq .iq-bar { grid-column: 1 / -1; height: 10px; border-radius: 3px; background: var(--rule); overflow: hidden; }
.iq .iq-bar i { display: block; height: 100%; background: var(--ink); border-radius: 3px; }
.iq .iq-bar.is-low i { background: var(--bad); }
.iq .iq-bar.is-high i { background: var(--ok); }
.iq .review-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.iq .review-row { width: 100%; display: grid; grid-template-columns: 2.2em minmax(0, 1fr) auto auto; gap: 10px; align-items: center; padding: 10px 12px; border: 1px solid var(--rule); border-radius: 10px; background: var(--sheet); cursor: pointer; text-align: left; font-size: 14px; }
.iq .review-row:hover { border-color: var(--ink-soft); }
.iq .review-no { font: 600 12px/1 var(--mono); color: var(--ink-soft); }
.iq .review-mark { font: 700 13px/1 var(--mono); padding: 4px 7px; border-radius: 5px; }
.iq .review-mark.ok { background: var(--ok-soft); color: var(--ok); }
.iq .review-mark.bad { background: var(--bad-soft); color: var(--bad); }
.iq .review-mark.iq-skip { background: var(--hover); color: var(--ink-soft); }
.iq .review-time { font: 500 12px/1 var(--mono); color: var(--ink-soft); font-variant-numeric: tabular-nums; }
.iq .review-body { margin-top: 8px; }
.iq .review-body .sheet { padding: clamp(14px, 2.4vw, 22px); }
.iq .review-expl { margin-top: 14px; font-size: 15px; }
.iq .review-expl ul { margin: 0; padding-left: 18px; display: grid; gap: 6px; }
.iq .actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }

/* ---------- progress ---------- */
.iq .prog-head h2 { font: 800 clamp(26px, 4vw, 36px)/1.05 var(--display); font-stretch: 118%; margin: 0 0 8px; letter-spacing: -0.01em; }
.iq .prog-head p { margin: 0 0 20px; color: var(--ink-soft); max-width: 66ch; }
.iq .iq-stats { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); margin-bottom: 26px; }
.iq .stat { padding: 14px 16px; border: 1px solid var(--rule); border-radius: 12px; background: var(--sheet); display: grid; gap: 6px; }
.iq .stat b { font: 800 32px/1 var(--display); font-stretch: 116%; font-variant-numeric: tabular-nums; }
.iq .stat span { font-size: 13px; color: var(--ink-soft); }
.iq .section-h { font: 800 20px/1.2 var(--display); font-stretch: 112%; margin: 0 0 12px; }
.iq .type-rows { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.iq .type-rows li { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 6px 12px; align-items: baseline; }
.iq .type-name { font-weight: 700; }
.iq .type-figs { font: 500 12px/1.3 var(--mono); color: var(--ink-soft); font-variant-numeric: tabular-nums; text-align: right; }
.iq .lv-pill { font: 600 11px/1 var(--mono); text-transform: uppercase; letter-spacing: 0.06em; padding: 3px 6px; border-radius: 4px; background: var(--hover); color: var(--ink-soft); margin-left: 8px; vertical-align: 2px; }
.iq .chart-wrap { border: 1px solid var(--rule); border-radius: 12px; background: var(--sheet); padding: 12px 12px 6px; }
.iq .chart { display: block; width: 100%; height: auto; }
.iq .ch-grid { stroke: var(--rule); stroke-width: 1; }
.iq .ch-axis { fill: var(--ink-faint); font: 500 11px var(--mono); }
.iq .ch-line { fill: none; stroke: var(--ink); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.iq .ch-area { fill: var(--mark-soft); }
.iq .ch-dot { fill: var(--sheet); stroke: var(--ink); stroke-width: 2; }
.iq .ch-last { fill: var(--mark); stroke: var(--ink); stroke-width: 2; }
.iq .ch-label { fill: var(--ink); font: 700 12px var(--mono); }
.iq .test-list { list-style: none; margin: 14px 0 0; padding: 0; display: grid; gap: 0; }
.iq .test-list li { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: 12px; padding: 9px 2px; border-bottom: 1px solid var(--rule); font-size: 14px; align-items: baseline; }
.iq .test-list .when { font: 500 12px/1.2 var(--mono); color: var(--ink-soft); }
.iq .empty { padding: 22px; border: 1.5px dashed var(--rule-strong); border-radius: 12px; color: var(--ink-soft); max-width: 66ch; }
.iq .empty p { margin: 0 0 12px; }
.iq .data-note { margin-top: 28px; padding-top: 16px; border-top: 1px solid var(--rule); font-size: 14px; color: var(--ink-soft); display: flex; flex-wrap: wrap; gap: 10px 18px; align-items: center; }
.iq .data-note p { margin: 0; flex: 1 1 320px; max-width: 70ch; }
.iq .data-note > :last-child { margin-left: auto; }

@media (prefers-reduced-motion: reduce) {

  .iq *, .iq *::before, .iq *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

/* ---------- on the site ---------- */
/* Last, so they win over the rules above: the app used inline styles for these,
   which the site's Content-Security-Policy does not allow. */
.iq .mt-20 { margin-top: 20px; }
.iq .mt-28 { margin-top: 28px; }
.iq .m-0 { margin: 0; }
.iq .no-rule { border-top: 0; padding-top: 0; }
.iq .btn-primary kbd { color: inherit; border-color: currentColor; }
.iq .test-start-intro h2, .iq .prog-head h2 { font-size: clamp(22px, 3vw, 26px); }   /* below the page's own h1 */