/* ==========================================================================
   Components — buttons, question card, options, navigator, results
   ========================================================================== */

/* ---------- buttons: translucent by default, accent reserved for CTA ---------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  font-family: inherit; font-size: 13px; font-weight: 510;
  letter-spacing: -0.13px;
  padding: 7px 13px;
  min-height: 34px;
  color: var(--ink-2);
  background: var(--sheen-1);
  border: 1px solid var(--line);
  border-radius: var(--r);
  cursor: pointer;
  transition: background .14s ease, color .14s ease, border-color .14s ease;
}
.btn:hover:not(:disabled) { background: var(--sheen-3); color: var(--ink); }
.btn:disabled { opacity: .38; cursor: not-allowed; }

.btn-primary {
  background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 590;
}
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }

.btn-lg { min-height: 40px; padding: 10px 18px; font-size: 14px; }
.btn-block { width: 100%; }
.btn-ghost { background: transparent; border-color: transparent; color: var(--ink-3); }
.btn-ghost:hover:not(:disabled) { background: var(--sheen-2); color: var(--ink); }

/* ---------- setup view: a real form, not a hero ---------- */

.setup-head { margin-bottom: 22px; }
.setup-head h1 {
  font-size: 30px; font-weight: 510; line-height: 1.13;
  letter-spacing: -0.704px; color: var(--ink);
}
.setup-head p {
  margin-top: 7px; font-size: 15px; color: var(--ink-3); max-width: 60ch;
}

.field { margin-bottom: 20px; }
.field-label {
  display: block;
  font-size: 10px; font-weight: 510; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--ink-4);
  margin-bottom: 8px;
}

/* segmented control — comparison of parallel options, aligned */
.segmented { display: flex; flex-wrap: wrap; gap: 8px; }

.seg {
  flex: 1 1 200px;
  text-align: left;
  padding: 12px 14px;
  background: var(--sheen-1);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  cursor: pointer;
  transition: background .14s ease, border-color .14s ease;
}
.seg:hover { background: var(--sheen-3); }
.seg[aria-pressed="true"] {
  border-color: var(--accent-hi);
  background: rgba(94,106,210,0.12);
}
.seg-title {
  display: flex; align-items: baseline; gap: 8px;
  font-size: 14px; font-weight: 510; color: var(--ink);
}
.seg-count {
  font-family: var(--mono); font-size: 11px; font-weight: 400; color: var(--ink-4);
  font-variant-numeric: tabular-nums;
}
.seg-desc { margin-top: 3px; font-size: 12px; color: var(--ink-3); }

.seg-sm { flex: 0 1 auto; padding: 8px 13px; }
.seg-sm .seg-title { font-size: 13px; }

/* advisory notice — factual caveat, not decoration */
.notice {
  margin-top: 10px;
  padding: 10px 12px;
  max-width: 74ch;
  font-size: 12.5px; line-height: 1.55; color: var(--ink-2);
  background: rgba(245,165,36,0.08);
  border: 1px solid rgba(245,165,36,0.28);
  border-left: 2px solid var(--warn);
  border-radius: 0 var(--r-md) var(--r-md) 0;
}
.notice b { color: var(--warn); font-weight: 590; }
.notice a { color: var(--accent-hover); }

/* coverage table — Compare framing: subject vs available counts */
.coverage { width: 100%; border-collapse: collapse; font-size: 13px; }
.coverage th {
  text-align: left; padding: 7px 10px;
  font-size: 10px; font-weight: 510; text-transform: uppercase;
  letter-spacing: 0.07em; color: var(--ink-4);
  border-bottom: 1px solid var(--line-soft);
}
.coverage th:not(:first-child), .coverage td:not(:first-child) { text-align: right; }
.coverage td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--line-soft);
  color: var(--ink-2);
}
.coverage td.num {
  font-family: var(--mono); font-variant-numeric: tabular-nums; color: var(--ink);
}
.coverage tr:last-child td { border-bottom: 0; }
.coverage tfoot td { color: var(--ink-3); font-weight: 510; }

/* ---------- exam view ---------- */

.q-meta {
  display: flex; align-items: center; flex-wrap: wrap; gap: 8px;
  margin-bottom: 12px;
}

.tag {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 2px 9px;
  font-size: 11px; font-weight: 510;
  color: var(--ink-2);
  background: transparent;
  border: 1px solid var(--line-solid);
  border-radius: var(--r-pill);
  white-space: nowrap;
}
.tag-index {
  font-family: var(--mono); font-variant-numeric: tabular-nums;
  background: var(--sheen-2); border-color: var(--line);
  color: var(--ink);
}
.tag-d1 { color: var(--ok); border-color: rgba(16,185,129,0.35); }
.tag-d2 { color: var(--warn); border-color: rgba(245,165,36,0.35); }
.tag-d3 { color: var(--bad); border-color: rgba(229,72,77,0.35); }

.q-stem {
  font-size: 19px; font-weight: 400; line-height: 1.55;
  letter-spacing: -0.24px; color: var(--ink);
  margin-bottom: 18px;
  max-width: 74ch;
  white-space: pre-wrap;
}

.options { display: flex; flex-direction: column; gap: 8px; max-width: 74ch; }

.opt {
  display: flex; align-items: flex-start; gap: 12px;
  width: 100%; text-align: left;
  padding: 12px 14px;
  font-family: inherit; font-size: 15px; line-height: 1.5; color: var(--ink-2);
  background: var(--sheen-1);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  cursor: pointer;
  transition: background .13s ease, border-color .13s ease, color .13s ease;
}
.opt:hover { background: var(--sheen-3); color: var(--ink); }

.opt-key {
  flex: none;
  width: 22px; height: 22px;
  display: grid; place-items: center;
  font-family: var(--mono); font-size: 11px; font-weight: 500;
  color: var(--ink-3);
  background: var(--sheen-2);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-sm);
}

.opt[aria-pressed="true"] {
  border-color: var(--accent-hi);
  background: rgba(94,106,210,0.14);
  color: var(--ink);
}
.opt[aria-pressed="true"] .opt-key {
  background: var(--accent); border-color: var(--accent); color: #fff;
}

/* review states */
.opt.is-correct { border-color: rgba(16,185,129,0.5); background: var(--ok-dim); color: var(--ink); }
.opt.is-correct .opt-key { background: var(--ok); border-color: var(--ok); color: #04120c; }
.opt.is-wrong { border-color: rgba(229,72,77,0.5); background: var(--bad-dim); }
.opt.is-wrong .opt-key { background: var(--bad); border-color: var(--bad); color: #fff; }
.opt.is-locked { cursor: default; }

.explain {
  margin-top: 12px; padding: 12px 14px;
  max-width: 74ch;
  font-size: 14px; line-height: 1.6; color: var(--ink-2);
  background: var(--sheen-1);
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--accent-hi);
  border-radius: 0 var(--r-md) var(--r-md) 0;
}
.explain b {
  display: block; margin-bottom: 4px;
  font-size: 10px; font-weight: 510; text-transform: uppercase;
  letter-spacing: 0.07em; color: var(--ink-4);
}

.exam-actions {
  display: flex; align-items: center; gap: 8px;
  margin-top: 24px; padding-top: 18px;
  border-top: 1px solid var(--line-soft);
  max-width: 74ch;
}
.exam-actions .spacer { flex: 1; }

/* ---------- navigator grid: the Operate affordance ---------- */

.nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(30px, 1fr));
  gap: 5px;
}

.nav-cell {
  aspect-ratio: 1;
  display: grid; place-items: center;
  font-family: var(--mono); font-size: 11px; font-variant-numeric: tabular-nums;
  color: var(--ink-4);
  background: var(--sheen-1);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: background .12s ease, color .12s ease, border-color .12s ease;
}
.nav-cell:hover { background: var(--sheen-3); color: var(--ink); }
.nav-cell.is-answered { color: var(--ink); background: var(--sheen-3); border-color: var(--line); }
.nav-cell.is-flagged { border-color: rgba(245,165,36,0.6); color: var(--flag); }
.nav-cell.is-current {
  border-color: var(--accent-hi); color: #fff; background: var(--accent);
}
.nav-cell.is-correct { border-color: rgba(16,185,129,0.5); color: var(--ok); background: var(--ok-dim); }
.nav-cell.is-incorrect { border-color: rgba(229,72,77,0.5); color: var(--bad); background: var(--bad-dim); }

.legend { display: flex; flex-direction: column; gap: 6px; margin-top: 12px; }
.legend-row {
  display: flex; align-items: center; gap: 8px;
  font-size: 11px; color: var(--ink-4);
}
.legend-swatch {
  width: 11px; height: 11px; border-radius: var(--r-xs);
  border: 1px solid var(--line-soft); background: var(--sheen-1);
}
.legend-swatch.sw-answered { background: var(--sheen-3); border-color: var(--line); }
.legend-swatch.sw-current { background: var(--accent); border-color: var(--accent-hi); }
.legend-swatch.sw-flagged { border-color: rgba(245,165,36,0.6); }

/* ---------- results: scoreboard, not a trophy ---------- */

.score-head {
  display: flex; align-items: flex-end; flex-wrap: wrap; gap: 20px;
  padding-bottom: 20px; margin-bottom: 22px;
  border-bottom: 1px solid var(--line-soft);
}
.score-figure { display: flex; align-items: baseline; gap: 4px; }
.score-num {
  font-family: var(--mono); font-size: 52px; font-weight: 500;
  line-height: 1; letter-spacing: -2px; color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.score-pct { font-family: var(--mono); font-size: 20px; color: var(--ink-4); }
.score-side { display: flex; flex-direction: column; gap: 3px; }
.score-verdict { font-size: 15px; font-weight: 510; color: var(--ink); }
.score-verdict.is-pass { color: var(--ok); }
.score-verdict.is-fail { color: var(--bad); }
.score-detail { font-size: 13px; color: var(--ink-3); font-variant-numeric: tabular-nums; }

/* per-subject breakdown — aligned bars for real comparison */
.bd-row {
  display: grid;
  grid-template-columns: minmax(120px, 1.3fr) minmax(90px, 3fr) auto;
  align-items: center; gap: 14px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line-soft);
}
.bd-row:last-child { border-bottom: 0; }
.bd-name { font-size: 14px; font-weight: 510; color: var(--ink); }
.bd-topic { font-size: 12px; color: var(--ink-4); }
.bd-track { height: 6px; background: var(--sheen-2); border-radius: var(--r-pill); overflow: hidden; }
.bd-fill { height: 100%; background: var(--accent-hi); border-radius: var(--r-pill); transition: width .5s ease; }
.bd-fill.is-strong { background: var(--ok); }
.bd-fill.is-weak { background: var(--bad); }
.bd-val {
  font-family: var(--mono); font-size: 13px; color: var(--ink-2);
  font-variant-numeric: tabular-nums; white-space: nowrap;
}

.section-title {
  font-size: 10px; font-weight: 510; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--ink-4);
  margin: 26px 0 10px;
}

.review-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
}
.review-item:last-child { border-bottom: 0; }

@media (max-width: 640px) {
  .setup-head h1 { font-size: 24px; letter-spacing: -0.5px; }
  .q-stem { font-size: 17px; }
  .score-num { font-size: 40px; }
  .bd-row { grid-template-columns: 1fr auto; row-gap: 6px; }
  .bd-track { grid-column: 1 / -1; }
}