*, *::before, *::after { box-sizing: border-box; }

[hidden] { display: none !important; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--plane);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  display: flex;
  min-height: 100vh;
}

h1, h2, h3, h4 { margin: 0; font-weight: 600; letter-spacing: -0.015em; }
p { margin: 0; }
button { font: inherit; color: inherit; }
a { color: inherit; }

/* ─────────────────────────────────────────────────────────── navigation rail */

.rail {
  width: var(--rail);
  flex: 0 0 var(--rail);
  background: var(--surface-1);
  border-right: 1px solid var(--border);
  padding: 26px 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand {
  padding: 0 10px 22px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.brand__mark {
  font-size: 15px;
  font-weight: 650;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 9px;
}

.brand__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
  flex: none;
}

.brand__sub {
  font-size: 11.5px;
  color: var(--ink-4);
  letter-spacing: 0.02em;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 9px 11px;
  border-radius: var(--r-sm);
  color: var(--ink-2);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
  transition: background 0.15s var(--ease), color 0.15s var(--ease);
}

.nav-item:hover { background: var(--surface-2); color: var(--ink); }

.nav-item.is-active {
  background: var(--accent-soft);
  border-color: var(--accent-line);
  color: var(--ink);
}

.nav-item svg { width: 16px; height: 16px; flex: none; opacity: 0.85; }

.nav-item__badge {
  margin-inline-start: auto;
  font-size: 11px;
  font-weight: 700;
  min-width: 19px;
  height: 19px;
  padding: 0 6px;
  border-radius: 10px;
  background: var(--accent);
  color: var(--on-accent);
  display: grid;
  place-items: center;
  font-variant-numeric: tabular-nums;
}

.rail__foot { margin-top: auto; padding-top: 14px; border-top: 1px solid var(--border); }

.theme-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 9px 11px;
  background: none;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  color: var(--ink-3);
  cursor: pointer;
  font-size: 13.5px;
  transition: background 0.15s var(--ease), color 0.15s var(--ease);
}

.theme-toggle:hover { background: var(--surface-2); color: var(--ink); }
.theme-toggle svg { width: 16px; height: 16px; }

/* ───────────────────────────────────────────────────────────────── main area */

.main {
  flex: 1;
  min-width: 0;
  padding: 40px 44px 88px;
  overflow-x: hidden;
}

.wrap { max-width: 940px; margin: 0 auto; }
.wrap--wide { max-width: 1180px; }

.page-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 26px;
}

.page-title { font-size: 27px; letter-spacing: -0.028em; }
.page-sub { color: var(--ink-3); font-size: 13.5px; margin-top: 3px; }

.eyebrow {
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-4);
}

/* ────────────────────────────────────────────────────────────────── surfaces */

.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 24px 26px;
  box-shadow: var(--shadow-1);
}

.card + .card { margin-top: 18px; }
.card__title { font-size: 15px; font-weight: 600; }
.card__head { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-bottom: 16px; }

.section-gap { margin-top: 34px; }

/* hero — the single next action */

.hero {
  position: relative;
  background:
    radial-gradient(120% 150% at 8% -20%, var(--accent-soft) 0%, transparent 58%),
    var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: 34px 36px 30px;
  box-shadow: var(--shadow-2);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  top: 26px;
  bottom: 26px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: linear-gradient(180deg, var(--accent), transparent);
}

.hero__kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.hero__title {
  font-size: 30px;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 6px;
}

.hero__skill { color: var(--accent); }

.hero__meta {
  display: flex;
  gap: 8px;
  align-items: center;
  color: var(--ink-3);
  font-size: 13.5px;
  font-variant-numeric: tabular-nums;
  margin-bottom: 18px;
}

.hero__meta span:not(:last-child)::after { content: "·"; margin-inline-start: 8px; color: var(--ink-4); }

.hero__reason {
  color: var(--ink-2);
  font-size: 15.5px;
  line-height: 1.62;
  max-width: 62ch;
  margin-bottom: 26px;
}

.hero__actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }

.hero__split { margin-top: 20px; padding-top: 18px; border-top: 1px solid var(--border); }
.hero__split-label { display: block; font-size: 12.5px; color: var(--ink-4); margin-bottom: 11px; }

/* ──────────────────────────────────────────────────────────────────── controls */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 11px 20px;
  border-radius: 11px;
  border: 1px solid transparent;
  background: var(--surface-2);
  color: var(--ink);
  font-size: 14.5px;
  font-weight: 550;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.12s var(--ease), background 0.15s var(--ease), border-color 0.15s var(--ease);
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.btn--primary {
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 650;
  padding: 12px 24px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.22);
}

.btn--primary:hover { filter: brightness(1.06); }

.btn--ghost { background: transparent; border-color: var(--border-strong); color: var(--ink-2); }
.btn--ghost:hover { background: var(--surface-2); color: var(--ink); }

.btn--sm { padding: 7px 13px; font-size: 13px; border-radius: 9px; }
.btn[disabled] { opacity: 0.45; cursor: not-allowed; transform: none; }

.kbd {
  font-family: var(--mono);
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 5px;
  background: var(--surface-3);
  border: 1px solid var(--border);
  color: var(--ink-3);
}

/* chips */

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.01em;
  background: var(--surface-3);
  color: var(--ink-2);
  border: 1px solid var(--border);
  white-space: nowrap;
}

.chip__dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; flex: none; }

.chip--accent { background: var(--accent-soft); border-color: var(--accent-line); color: var(--accent); }
.chip--unknown { color: var(--st-unknown); }
.chip--fragile { color: var(--st-fragile); }
.chip--competent_untimed { color: var(--st-untimed); }
.chip--competent_slow { color: var(--st-slow); }
.chip--exam_ready { color: var(--st-ready); }
.chip--stale { color: var(--st-stale); }

/* banners */

.banner {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 15px 20px;
  border-radius: var(--r-md);
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  margin-bottom: 18px;
}

.banner__icon { color: var(--accent); display: grid; place-items: center; flex: none; }
.banner__icon svg { width: 19px; height: 19px; }
.banner__text { flex: 1; min-width: 0; font-size: 14px; }
.banner__title { font-weight: 600; }
.banner__sub { color: var(--ink-3); font-size: 12.5px; }

.banner--warn { background: color-mix(in srgb, var(--st-fragile) 11%, transparent); border-color: color-mix(in srgb, var(--st-fragile) 34%, transparent); }
.banner--warn .banner__icon { color: var(--st-fragile); }

/* ───────────────────────────────────────────────────────────────── stat tiles */

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(178px, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.stat {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 17px 19px;
}

.stat__label { font-size: 11.5px; color: var(--ink-4); font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; }
.stat__value { font-size: 27px; font-weight: 620; letter-spacing: -0.03em; margin-top: 7px; line-height: 1.1; }
.stat__value small { font-size: 15px; font-weight: 500; color: var(--ink-3); letter-spacing: 0; }
.stat__note { font-size: 12px; color: var(--ink-4); margin-top: 5px; }

/* meters — thin marks, rounded data-ends, recessive track */

.meter { display: flex; align-items: center; gap: 9px; }
.meter__track { flex: 1; height: 5px; border-radius: 3px; background: var(--mark-track); overflow: hidden; min-width: 42px; }
.meter__fill { height: 100%; border-radius: 3px; transition: width 0.5s var(--ease); }
.meter__value { font-size: 12px; color: var(--ink-2); font-variant-numeric: tabular-nums; min-width: 34px; text-align: end; }
.meter__count { font-size: 11px; color: var(--ink-4); font-variant-numeric: tabular-nums; min-width: 30px; text-align: end; margin-inline-start: 2px; }
.meter__key { font-size: 11.5px; color: var(--ink-4); min-width: 52px; }

/* ─────────────────────────────────────────────────────────── the why panel */

.why { margin-top: 18px; border-top: 1px solid var(--border); padding-top: 18px; }

.why__intro { font-size: 12.5px; color: var(--ink-4); margin-bottom: 12px; }

.why-table { width: 100%; border-collapse: collapse; font-size: 13px; font-variant-numeric: tabular-nums; }
.why-table th { text-align: end; font-weight: 600; color: var(--ink-4); font-size: 11px; text-transform: uppercase; letter-spacing: 0.05em; padding: 0 0 8px; }
.why-table th:first-child, .why-table td:first-child { text-align: start; }
.why-table td { padding: 8px 0; border-top: 1px solid var(--border); text-align: end; color: var(--ink-2); }
.why-table tr.is-pick td { color: var(--ink); font-weight: 600; }
.why-table tr.is-pick td:first-child { color: var(--accent); }
.why-table .why-score { font-weight: 700; }
.why__formula { font-size: 11.5px; color: var(--ink-4); margin-top: 12px; font-family: var(--mono); }

/* code / template blocks */

.code {
  background: var(--plane);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 16px 18px;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--ink-2);
  overflow-x: auto;
  white-space: pre;
  margin-top: 14px;
}

/* ──────────────────────────────────────────────────────────────── mastery map */

.topic-block { margin-bottom: 28px; }
.topic-head { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.topic-head h3 { font-size: 14px; font-weight: 600; }
.topic-head__line { flex: 1; height: 1px; background: var(--border); }
.topic-head__count { font-size: 12px; color: var(--ink-4); font-variant-numeric: tabular-nums; }

.skill-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(268px, 1fr)); gap: 12px; }

.skill-cell {
  position: relative;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 15px 17px 14px;
  cursor: pointer;
  text-align: start;
  width: 100%;
  transition: border-color 0.15s var(--ease), transform 0.15s var(--ease), background 0.15s var(--ease);
  overflow: hidden;
}

.skill-cell::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--cell-color, var(--st-unknown));
}

.skill-cell:hover { transform: translateY(-2px); border-color: var(--border-strong); background: var(--surface-2); }
.skill-cell:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.skill-cell.is-selected { border-color: var(--accent-line); background: var(--surface-2); }

.skill-cell__top { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; margin-bottom: 12px; }
.skill-cell__name { font-size: 14px; font-weight: 560; line-height: 1.3; }
.skill-cell__meters { display: flex; flex-direction: column; gap: 6px; }
.skill-cell__foot { display: flex; justify-content: space-between; gap: 10px; margin-top: 11px; font-size: 11.5px; color: var(--ink-4); font-variant-numeric: tabular-nums; }

.detail { position: sticky; top: 40px; }
.detail__reason { color: var(--ink-2); font-size: 13.5px; line-height: 1.6; margin-top: 10px; }

.dl { display: grid; grid-template-columns: auto 1fr; gap: 9px 18px; margin-top: 16px; font-size: 13px; }
.dl dt { color: var(--ink-4); }
.dl dd { margin: 0; text-align: end; font-variant-numeric: tabular-nums; color: var(--ink-2); }

.split { display: grid; grid-template-columns: 1fr 320px; gap: 22px; align-items: start; }
@media (max-width: 1080px) { .split { grid-template-columns: 1fr; } .detail { position: static; } }

/* legend */

.legend { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 20px; font-size: 12px; color: var(--ink-3); }
.legend__item { display: flex; align-items: center; gap: 7px; }
.legend__swatch { width: 9px; height: 9px; border-radius: 2px; flex: none; }

/* ────────────────────────────────────────────────────────────── session mode */

body.is-session .rail { display: none; }
body.is-session .main { padding: 0; }

.runner {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--plane);
}

.runner__bar {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 18px 30px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-1);
  position: sticky;
  top: 0;
  z-index: 5;
}

.runner__label { font-size: 13px; color: var(--ink-3); font-weight: 550; }
.runner__spacer { flex: 1; }

.dots { display: flex; gap: 5px; align-items: center; }
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--mark-track); transition: background 0.25s var(--ease), transform 0.25s var(--ease); }
.dot.is-done { background: var(--ink-4); }
.dot.is-right { background: var(--good); }
.dot.is-wrong { background: var(--bad); }
.dot.is-current { background: var(--accent); transform: scale(1.45); }

.timer { display: flex; align-items: center; gap: 10px; }
.timer__ring { width: 40px; height: 40px; transform: rotate(-90deg); }
.timer__track { fill: none; stroke: var(--mark-track); stroke-width: 3.5; }
.timer__arc { fill: none; stroke: var(--accent); stroke-width: 3.5; stroke-linecap: round; transition: stroke-dashoffset 0.95s linear, stroke 0.4s var(--ease); }
.timer__arc.is-low { stroke: var(--st-fragile); }
.timer__arc.is-elapsed { stroke: var(--ink-4); opacity: 0.45; }
.timer__text { font-size: 14px; font-variant-numeric: tabular-nums; color: var(--ink-2); min-width: 44px; font-weight: 550; }

.runner__body { flex: 1; display: flex; align-items: flex-start; justify-content: center; padding: 46px 30px 60px; }
.runner__inner { width: 100%; max-width: 720px; }

.q-prompt {
  font-size: 13px;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 14px;
}

.q-passage {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 20px 24px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
  margin-bottom: 22px;
  max-height: 34vh;
  overflow-y: auto;
}

.q-stem {
  font-size: 20px;
  line-height: 1.62;
  letter-spacing: -0.008em;
  margin-bottom: 30px;
  white-space: pre-wrap;
}

.q-stem[dir="rtl"], .q-passage[dir="rtl"] { text-align: right; }

.choices { display: flex; flex-direction: column; gap: 10px; }

.choice {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  width: 100%;
  padding: 13px 18px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  cursor: pointer;
  text-align: start;
  font-size: 16px;
  line-height: 1.5;
  transition: transform 0.12s var(--ease), border-color 0.15s var(--ease), background 0.15s var(--ease);
}

.choice:hover:not([disabled]) { transform: translateY(-1px); border-color: var(--border-strong); background: var(--surface-2); }
.choice:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.choice__num {
  flex: none;
  width: 26px;
  height: 26px;
  border-radius: 7px;
  background: var(--surface-3);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  font-size: 12.5px;
  font-weight: 650;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
  margin-top: 1px;
}

.choice__text { flex: 1; min-width: 0; }
.choice[dir="rtl"] { text-align: right; }

.choice.is-picked { border-color: var(--accent); background: var(--accent-soft); }
.choice.is-picked .choice__num { background: var(--accent); color: var(--on-accent); border-color: transparent; }

.choice.is-correct { border-color: var(--good); background: color-mix(in srgb, var(--good) 12%, transparent); }
.choice.is-correct .choice__num { background: var(--good); color: #fff; border-color: transparent; }
.choice.is-wrong { border-color: var(--bad); background: color-mix(in srgb, var(--bad) 12%, transparent); }
.choice.is-wrong .choice__num { background: var(--bad); color: #fff; border-color: transparent; }

.runner__foot {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.hint { font-size: 12px; color: var(--ink-4); display: flex; align-items: center; gap: 7px; flex-wrap: wrap; }

.feedback {
  margin-top: 22px;
  padding: 18px 22px;
  border-radius: var(--r-md);
  border: 1px solid var(--border);
  background: var(--surface-1);
  animation: rise 0.3s var(--ease);
}

.feedback__head { display: flex; align-items: center; gap: 10px; font-weight: 620; font-size: 15px; margin-bottom: 9px; }
.feedback__body { color: var(--ink-2); font-size: 14.5px; line-height: 1.68; white-space: pre-wrap; }
.feedback--right .feedback__head { color: var(--good); }
.feedback--wrong .feedback__head { color: var(--bad); }

@keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* summary */

.summary { animation: rise 0.35s var(--ease); }

.summary__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; margin: 22px 0; }

.consequence {
  display: flex;
  gap: 12px;
  padding: 15px 18px;
  border-radius: var(--r-md);
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 10px;
}

.consequence svg { width: 17px; height: 17px; color: var(--accent); flex: none; margin-top: 2px; }

.review-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 11px 0;
  border-top: 1px solid var(--border);
  font-size: 13.5px;
}

.review-row__mark { width: 20px; flex: none; text-align: center; font-weight: 700; }
.review-row__mark.ok { color: var(--good); }
.review-row__mark.no { color: var(--bad); }
.review-row__q { flex: 1; min-width: 0; color: var(--ink-2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.review-row__rt { color: var(--ink-4); font-variant-numeric: tabular-nums; font-size: 12.5px; }
.review-row__rt.over { color: var(--st-slow); }

/* ─────────────────────────────────────────────────────────────── hypotheses */

.hyp { border-inline-start: 3px solid var(--st-unknown); }
.hyp--open { border-inline-start-color: var(--st-slow); }
.hyp--supported { border-inline-start-color: var(--st-ready); }
.hyp--refuted { border-inline-start-color: var(--st-fragile); }

.hyp__claim { font-size: 16.5px; line-height: 1.5; margin: 10px 0 12px; letter-spacing: -0.01em; }
.hyp__meta { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.hyp__field { font-size: 13px; color: var(--ink-2); margin-top: 9px; }
.hyp__field b { color: var(--ink-3); font-weight: 600; }

.evidence { margin-top: 14px; border-top: 1px solid var(--border); padding-top: 12px; display: flex; flex-direction: column; gap: 7px; }
.evidence__row { display: flex; gap: 11px; font-size: 12.5px; align-items: baseline; }
.evidence__dir { font-weight: 650; min-width: 62px; }
.evidence__dir.confirm { color: var(--good); }
.evidence__dir.refute { color: var(--bad); }
.evidence__dir.neutral { color: var(--ink-4); }
.evidence__detail { color: var(--ink-3); font-family: var(--mono); font-size: 11.5px; }

/* ─────────────────────────────────────────────────────────────────── review */

.md { font-size: 14.5px; line-height: 1.7; color: var(--ink-2); }
.md h1 { font-size: 22px; color: var(--ink); margin: 0 0 6px; letter-spacing: -0.025em; }
.md h2 { font-size: 15px; color: var(--ink); margin: 28px 0 10px; }
.md h3 { font-size: 14px; color: var(--ink); margin: 20px 0 8px; }
.md p { margin: 0 0 12px; }
.md ul, .md ol { margin: 0 0 14px; padding-inline-start: 20px; }
.md li { margin-bottom: 5px; }
.md strong { color: var(--ink); font-weight: 620; }
.md em { color: var(--ink-4); }
.md code { font-family: var(--mono); font-size: 12.5px; background: var(--surface-3); padding: 1.5px 5px; border-radius: 4px; }
.md table { width: 100%; border-collapse: collapse; font-size: 13px; margin: 0 0 16px; font-variant-numeric: tabular-nums; }
.md th { text-align: start; font-size: 11px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-4); padding: 0 12px 8px 0; font-weight: 650; }
.md td { padding: 8px 12px 8px 0; border-top: 1px solid var(--border); }
.md hr { border: 0; border-top: 1px solid var(--border); margin: 22px 0; }

.scroll-x { overflow-x: auto; }

/* ────────────────────────────────────────────────────────────── empty states */

.empty { text-align: center; padding: 60px 24px; }
.empty__icon { width: 44px; height: 44px; margin: 0 auto 18px; color: var(--ink-4); opacity: 0.5; }
.empty__title { font-size: 17px; font-weight: 600; margin-bottom: 7px; }
.empty__body { color: var(--ink-3); font-size: 14px; max-width: 44ch; margin: 0 auto; line-height: 1.6; }
.empty__body code { font-family: var(--mono); font-size: 13px; background: var(--surface-3); padding: 2px 6px; border-radius: 5px; color: var(--ink-2); }

.skeleton { background: var(--surface-2); border-radius: var(--r-md); height: 120px; animation: pulse 1.4s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { opacity: 0.55; } 50% { opacity: 0.9; } }

.toast {
  position: fixed;
  inset-block-end: 26px;
  inset-inline-end: 26px;
  padding: 13px 19px;
  background: var(--surface-3);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-3);
  font-size: 13.5px;
  z-index: 40;
  animation: rise 0.25s var(--ease);
  max-width: 380px;
}

.toast--error { border-color: var(--bad); color: var(--ink); }

@media (max-width: 780px) {
  body { flex-direction: column; }
  .rail { width: 100%; flex: none; height: auto; position: static; flex-direction: row; align-items: center; gap: 2px; padding: 10px 12px; overflow-x: auto; }
  .brand { display: none; }
  .rail__foot { margin: 0 0 0 auto; padding: 0; border: 0; }
  .main { padding: 24px 18px 60px; }
  .hero { padding: 26px 22px; }
  .hero__title { font-size: 24px; }
  .runner__body { padding: 28px 18px 48px; }
  .q-stem { font-size: 18px; }
}

/* ══════════════════════════════════ error-debugger playground ══════════════
   The learner-facing surface is Hebrew and lays out right-to-left; the
   experimenter panel is deliberately left-to-right English so the tester can
   read the system's reasoning without fighting the direction. */

.btn--xs { padding: 4px 10px; font-size: 12px; border-radius: 7px; flex: none; }

.cta-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-top: 16px; }
.cta-row--end { margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--border); }

.practice { border-color: var(--accent-line); }

.debug .page-title { font-size: 26px; }
.dchips { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }

.dchip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  font-size: 11.5px;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}
.dchip--warn { border-color: var(--st-slow); color: var(--st-slow); }
.dchip--pattern { border-color: var(--accent-line); color: var(--accent); }
.dchip--type { background: var(--accent-soft); border-color: var(--accent-line); color: var(--accent); }

.choices--static .choice { cursor: default; }
.choices--static .choice:hover { transform: none; border-color: var(--border); background: var(--surface-1); }
.choices--static .choice.is-correct:hover { border-color: var(--good); }
.choice__tag { flex: none; font-size: 11px; color: var(--ink-4); align-self: center; }

/* triage + feedback pills */
.triage { display: flex; flex-wrap: wrap; gap: 9px; margin: 14px 0; }

.triage-option {
  padding: 9px 15px;
  border-radius: 999px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  color: var(--ink-2);
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  transition: border-color 0.15s var(--ease), background 0.15s var(--ease);
}
.triage-option:hover:not([disabled]) { border-color: var(--border-strong); background: var(--surface-2); }
.triage-option.is-selected { border-color: var(--accent); background: var(--accent-soft); color: var(--ink); }
.triage-option[disabled] { opacity: 0.45; cursor: default; }
.triage-option--sm { padding: 6px 12px; font-size: 13px; }

.dinput {
  width: 100%;
  margin-top: 10px;
  padding: 11px 14px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  background: var(--surface-1);
  color: var(--ink);
  font-family: inherit;
  font-size: 14px;
  resize: vertical;
}
.dinput:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

.dhint { font-size: 12.5px; color: var(--ink-4); margin-top: 10px; line-height: 1.6; }

.xgrid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

/* the debrief itself */
.debrief__sec { padding: 18px 0; border-bottom: 1px solid var(--border); }
.debrief__sec:last-of-type { border-bottom: 0; }

.debrief__label {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 11.5px;
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-4);
  margin-bottom: 9px;
}
.debrief__body { font-size: 15.5px; line-height: 1.7; color: var(--ink-2); }

.debrief__sec--take { background: var(--accent-soft); margin: 0 -22px; padding: 20px 22px; border-radius: var(--r-md); }
.debrief__take { font-size: 18px; line-height: 1.6; font-weight: 550; color: var(--ink); }

.debrief__pattern {
  margin-top: 12px;
  padding: 10px 14px;
  border-radius: var(--r-sm);
  border: 1px solid var(--accent-line);
  background: var(--accent-soft);
  font-size: 13px;
  color: var(--ink-2);
}

.dwait { display: grid; place-items: center; gap: 12px; padding: 60px 20px; text-align: center; }
.dwait__text { font-size: 16px; color: var(--ink-2); }

.spinner {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 2.5px solid var(--border-strong);
  border-top-color: var(--accent);
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.dfeedback__row { padding: 12px 0; border-bottom: 1px solid var(--border); }
.dfeedback__row:last-of-type { border-bottom: 0; }
.dfeedback__q { font-size: 14px; color: var(--ink-2); margin-bottom: 9px; }
.dfeedback__opts { display: flex; flex-wrap: wrap; gap: 8px; }

/* experimenter panel — internal, never customer-facing */
.panel {
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface-1);
  padding: 0 18px;
}
.panel > summary {
  cursor: pointer;
  padding: 14px 0;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-4);
}
.panel[open] > summary { border-bottom: 1px solid var(--border); }
.panel__body { padding: 6px 0 16px; font-size: 13px; }
.panel__row { display: grid; grid-template-columns: 190px 1fr; gap: 14px; padding: 7px 0; line-height: 1.6; color: var(--ink-2); }
.panel__key { color: var(--ink-4); font-family: var(--mono); font-size: 11.5px; }
.panel__row code { font-family: var(--mono); font-size: 11.5px; color: var(--ink-3); word-break: break-all; }

.review-row__why {
  padding: 0 12px 12px 12px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--ink-3);
  border-bottom: 1px solid var(--border);
  white-space: pre-wrap;
}

@media (max-width: 780px) {
  .xgrid { grid-template-columns: 1fr; }
  .panel__row { grid-template-columns: 1fr; gap: 2px; }
  .debrief__sec--take { margin: 0 -18px; }
}

/* ── debug: recall the question, and talk it through ─────────────────────── */

.qrecall {
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface-1);
  padding: 0 22px;
}
.qrecall > summary {
  cursor: pointer;
  padding: 15px 0;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink-2);
}
.qrecall[open] > summary { border-bottom: 1px solid var(--border); }
.qrecall__body { padding: 18px 0 22px; }
.qrecall__sol { margin-top: 20px; padding-top: 18px; border-top: 1px solid var(--border); }

.chat__log { display: flex; flex-direction: column; gap: 10px; margin-bottom: 14px; max-height: 460px; overflow-y: auto; }
.chat__log:empty { display: none; }

.chat__msg {
  padding: 12px 16px;
  border-radius: var(--r-md);
  font-size: 14.5px;
  line-height: 1.7;
  max-width: 88%;
  animation: rise 0.25s var(--ease);
}
.chat__msg--me { align-self: flex-start; background: var(--accent-soft); border: 1px solid var(--accent-line); color: var(--ink); }
.chat__msg--claude { align-self: flex-end; background: var(--surface-2); border: 1px solid var(--border); color: var(--ink-2); }
.chat__msg--fallback { border-color: var(--st-slow); }
.chat__msg--wait { display: flex; align-items: center; gap: 10px; color: var(--ink-4); font-size: 13.5px; }

.chat__msg p { margin: 0 0 8px; }
.chat__msg p:last-child { margin-bottom: 0; }
.chat__msg ul { margin: 6px 0; padding-inline-start: 20px; }
.chat__msg code { font-family: var(--mono); font-size: 12.5px; background: var(--surface-3); padding: 1px 5px; border-radius: 5px; }

.spinner--sm { width: 15px; height: 15px; border-width: 2px; }

/* ── debug: what the follow-ups revealed ─────────────────────────────────── */

.insight { border-color: var(--accent-line); }

.insight__verdict {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
/* A corrected or off-target reading is the most useful thing the audit can
   report, so it is marked rather than blended in. */
.insight__verdict.is-shaky { border-top-color: var(--st-slow); }
.insight__verdict.is-shaky .debrief__body { color: var(--st-slow); }

.insight__better {
  margin-top: 14px;
  padding: 14px 16px;
  border-radius: var(--r-md);
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
}
.insight__better .debrief__take { font-size: 16px; }

/* Evidence against a pattern, shown next to it rather than tucked away —
   a claim you can only see the support for is not auditable. */
.against { color: var(--ink-4); font-size: 12px; }


/* Friend-beta build only: the recording notice. Fixed rather than tucked in the
   rail, because the rail becomes a horizontal scroller on a phone and the notice
   scrolled off-screen — a disclosure you cannot see is not a disclosure. */
/* body is a height:100% flex container and does not scroll — `.main` does.
   `.main` already carries 88px of bottom padding, but the session runner zeroes
   it (`body.is-session .main { padding: 0 }`), which would leave the last answer
   choice permanently under the bar. Give that case back just enough room. */
body.is-session .main { padding-bottom: 34px; }

.rec-bar {
  position: fixed;
  inset: auto 0 0 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 6px 12px calc(6px + env(safe-area-inset-bottom, 0px));
  font-size: 11px;
  line-height: 1.3;
  color: var(--ink-3, #a6a39b);
  background: var(--surface-2, #1a1a21);
  border-top: 1px solid var(--line, #2a2a33);
}

.rec-bar__dot {
  width: 6px; height: 6px; flex: none;
  border-radius: 50%;
  background: #d9534f;
}