/* Examination room + student pages. Uses the design tokens from base.css (light/dark aware). */
.btn-large { padding: 14px 28px; font-size: 1.1rem; min-height: 52px; }
.narrow-page { max-width: 760px; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: var(--gap); }
.exam-card h2 { margin-bottom: 0; }
.facts { list-style: none; margin: 8px 0 14px; padding: 0; display: flex; flex-wrap: wrap; gap: 6px 18px; color: var(--muted); }
.facts.big { color: var(--text); font-size: 1.05rem; flex-direction: column; gap: 4px; }
.warnbox { background: var(--warn-soft); border: 1px solid var(--warn); border-radius: var(--radius); padding: 10px 14px; margin: 12px 0; }
.jumps { display: flex; flex-wrap: wrap; gap: 6px; margin: 6px 0 10px; }

/* ---- room layout ---- */
.room-host { min-height: 100vh; }
.room { display: flex; flex-direction: column; min-height: 100vh; }
.room-bar { position: sticky; top: 0; z-index: 6; display: grid; grid-template-columns: minmax(0, 1fr) auto auto auto; gap: 8px 16px; align-items: center;
  padding: 10px var(--gap); background: var(--surface); border-bottom: 1px solid var(--line); }
.room-title { font-size: 1.1rem; margin: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.timer { display: flex; flex-direction: column; align-items: center; line-height: 1.1; padding: 4px 14px; border: 2px solid var(--line); border-radius: 10px; min-width: 112px; }
.timer-label { font-size: .7rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.timer-value { font-size: 1.5rem; font-variant-numeric: tabular-nums; }
.timer.warn { border-color: var(--warn); background: var(--warn-soft); }
.timer.danger { border-color: var(--bad); background: var(--bad-soft); }
.save-status { margin: 0; font-size: .875rem; max-width: 300px; }
.tone-ok { color: var(--ok); } .tone-warn { color: var(--warn); } .tone-bad { color: var(--bad); font-weight: 600; } .tone-busy { color: var(--muted); }
.room-body { flex: 1; display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: var(--gap); padding: var(--gap); max-width: 1200px; width: 100%; margin: 0 auto; align-items: start; }
.room-side { position: sticky; top: 76px; display: grid; gap: 10px; }
.navigator { display: grid; grid-template-columns: repeat(auto-fill, minmax(46px, 1fr)); gap: 6px; }
.nav-btn { min-height: 44px; border-radius: 8px; border: 2px solid var(--line); background: var(--surface); color: var(--text); font: inherit; font-weight: 700; cursor: pointer; }
.nav-btn.answered { background: var(--brand-soft); border-color: var(--brand); }
.nav-btn.flagged { border-style: dashed; border-color: var(--warn); }
.nav-btn.current { outline: 3px solid var(--focus); outline-offset: 1px; }
.nav-btn.answered-no { background: var(--warn-soft); border-color: var(--warn); padding: 0 12px; }
.instructions { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 8px 12px; }
.instructions summary { cursor: pointer; font-weight: 600; }
.room-main { min-width: 0; }
.room-question { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.room-foot { display: flex; justify-content: space-between; gap: 8px; margin-top: var(--gap); flex-wrap: wrap; }
.sq-num { margin: 0; font-size: 1.15rem; } .sq-num:focus { outline: 3px solid var(--focus); outline-offset: 3px; }
.sq-text { font-size: 1.05rem; } .sq-input { font-size: 1rem; } textarea.sq-input { min-height: 220px; }
.sq-clear { margin-top: 6px; }

/* ---- phone & tablet: navigator becomes a scrolling strip under the header ---- */
@media (max-width: 900px) {
  .room-body { grid-template-columns: 1fr; padding: 10px; }
  .room-side { position: static; }
  .navigator { display: flex; overflow-x: auto; gap: 6px; padding-bottom: 6px; scroll-snap-type: x proximity; }
  .nav-btn { flex: 0 0 48px; scroll-snap-align: start; }
  .nav-legend { display: none; }
}
@media (max-width: 640px) {
  /* compact sticky header: title / [finish button] [timer] / save status */
  .room-bar { grid-template-columns: 1fr auto; padding: 6px 12px; gap: 4px 10px; }
  .room-title { grid-column: 1 / -1; grid-row: 1; font-size: 1rem; }
  .room-bar > .btn { grid-column: 1 / 2; grid-row: 2; justify-self: start; min-height: 44px; }
  .timer { grid-column: 2 / 3; grid-row: 2; min-width: 96px; padding: 2px 10px; }
  .timer-value { font-size: 1.3rem; }
  .save-status { grid-column: 1 / -1; grid-row: 3; max-width: none; font-size: .8rem; }
  .room-question { padding: 14px; }
  .room-foot .btn { flex: 1 1 30%; padding: 12px 8px; min-height: 48px; }
  textarea.sq-input { min-height: 180px; }
}

/* honeypot field for the sign-up form: off-screen, never reachable by keyboard or screen reader */
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }