/**
 * exam-todox.css — exam console ko TodoXMock wala roop.
 *
 * Logic bilkul wahi purani hai (sectional timer, lock, Hindi/English,
 * section tabs) — sirf dikhawat badli hai: upar patli header + progress pill,
 * daayen (ya baayen) palette me Answered/Left/Marked boxes, beech me swachh
 * question card, aur niche chipka hua controls bar. Mobile me palette
 * neeche se sheet ki tarah khulti hai.
 */

:root {
  --ex-ok: #036B4A;   --ex-ok-bg: rgba(5, 150, 105, .13);   --ex-ok-bd: rgba(5, 150, 105, .38);
  --ex-no: #B91C1C;   --ex-no-bg: rgba(239, 68, 68, .12);   --ex-no-bd: rgba(239, 68, 68, .36);
  --ex-mk: #6D28D9;   --ex-mk-bg: rgba(124, 58, 237, .13);  --ex-mk-bd: rgba(124, 58, 237, .38);
}
html[data-theme='dark'] {
  --ex-ok: #34D399;   --ex-ok-bg: rgba(52, 211, 153, .16);  --ex-ok-bd: rgba(52, 211, 153, .40);
  --ex-no: #F87171;   --ex-no-bg: rgba(248, 113, 113, .16); --ex-no-bd: rgba(248, 113, 113, .40);
  --ex-mk: #C4B5FD;   --ex-mk-bg: rgba(167, 139, 250, .18); --ex-mk-bd: rgba(167, 139, 250, .42);
}

/* ------------------------------------------------------------ page shell */
.ex-page { min-height: 100vh; display: flex; flex-direction: column; background: var(--bg); }

.ex-head { position: sticky; top: 0; z-index: 20; background: var(--card); border-bottom: 1px solid var(--border); }
.ex-hrow { display: flex; align-items: center; gap: 16px; min-height: 66px; padding: 8px 18px; }
.ex-brand { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.ex-board { font-size: 10.5px; font-weight: 800; letter-spacing: .07em; text-transform: uppercase; color: var(--muted); }
.ex-label { font-size: 15px; font-weight: 800; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* clock — TodoXMock wali pill */
.ex-clock {
  display: flex; align-items: baseline; gap: 10px; margin-left: auto;
  padding: 7px 14px; border-radius: 10px;
  background: var(--bare); border: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
}
.ex-clock-num { font-size: 18px; font-weight: 800; color: var(--text); letter-spacing: -.01em; }
.ex-clock-num.warn { color: var(--info); }
.ex-clock-num.danger { color: var(--danger); }
.ex-clock-lab { font-size: 10px; font-weight: 800; letter-spacing: .06em; color: var(--muted); text-transform: uppercase; }
.ex-clock-total { font-size: 11.5px; color: var(--muted); }

/* strip */
.ex-strip {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 7px 18px; background: var(--bg); border-top: 1px solid var(--border);
}
.ex-strip-c { display: flex; align-items: center; gap: 10px; margin: 0 auto; }
.ex-strip-r { display: flex; align-items: center; gap: 8px; }
.ex-progress-pill {
  padding: 6px 14px; border-radius: 99px;
  background: var(--brand-soft); border: 1px solid color-mix(in srgb, var(--brand) 35%, transparent);
  color: var(--brand); font-size: 13px; font-weight: 700; white-space: nowrap;
}
.ex-anscount { font-size: 12.5px; color: var(--muted); }

/* tabs */
.ex-tabs { display: flex; gap: 8px; padding: 10px 18px; overflow-x: auto; background: var(--card); border-bottom: 1px solid var(--border); scrollbar-width: none; }
.ex-tabs::-webkit-scrollbar { display: none; }
.ex-tab {
  flex: 0 0 auto; height: 34px; padding: 0 14px; border-radius: 99px;
  border: 1px solid var(--border); background: transparent; color: var(--muted);
  font-size: 12.5px; font-weight: 700; cursor: pointer;
  display: inline-flex; align-items: center; gap: 6px;
}
.ex-tab.on { background: var(--brand-soft); border-color: var(--brand); color: var(--brand); }
.ex-tab.locked { opacity: .55; }
.ex-tab-n { font-size: 11px; opacity: .8; }

/* ------------------------------------------------------------ body grid */
.ex-body { flex: 1 1 auto; display: grid; grid-template-columns: minmax(0, 1fr) 322px; min-height: 0; }
.ex-pal-left .ex-body { grid-template-columns: 322px minmax(0, 1fr); }
.ex-pal-left .ex-pal { order: -1; }
.ex-main { min-width: 0; overflow-y: auto; display: flex; flex-direction: column; }

/* ------------------------------------------------------------ palette */
.ex-pal {
  display: flex; flex-direction: column; min-height: 0;
  background: var(--card); border-left: 1px solid var(--border);
  border-radius: 0 !important; padding: 0 !important; box-shadow: none !important;
}
.ex-pal-left .ex-pal { border-left: 0; border-right: 1px solid var(--border); }
.ex-pal-h { padding: 14px 16px 10px; font-size: 13px; font-weight: 800; color: var(--text); border-bottom: 1px solid var(--border); }

.ex-pal-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; padding: 12px 16px 4px; }
.ex-pal-stat { text-align: center; padding: 9px 4px; border-radius: 10px; border: 1px solid var(--border); background: var(--bg); }
.ex-pal-stat b { display: block; font-size: 17px; font-weight: 800; line-height: 1.15; }
.ex-pal-stat span { font-size: 10px; letter-spacing: .04em; text-transform: uppercase; color: var(--muted); }
.ex-pal-stat.ok b { color: var(--ex-ok); }
.ex-pal-stat.no b { color: var(--ex-no); }
.ex-pal-stat.mk b { color: var(--ex-mk); }

.ex-pal-groups { flex: 1 1 auto; overflow-y: auto; padding: 10px 16px 14px; }
.ex-pal-sec-h {
  display: flex; justify-content: space-between; align-items: center;
  margin: 12px 0 8px; font-size: 10.5px; font-weight: 800;
  letter-spacing: .05em; text-transform: uppercase; color: var(--muted);
}
.ex-pal-sec.locked { opacity: .55; }
.ex-pal-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 8px; }
.ex-pal-btn {
  height: 42px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--card);
  font-size: 13.5px; font-weight: 700; color: var(--muted); cursor: pointer;
  transition: transform .14s var(--os-ease, ease), box-shadow .16s var(--os-ease, ease),
              background .16s var(--os-ease, ease), border-color .16s var(--os-ease, ease);
}
.ex-pal-btn:hover:not(:disabled) { transform: translateY(-1px); }
.ex-pal-btn.cur { box-shadow: 0 0 0 2px var(--brand); border-color: var(--brand); }
.ex-pal-btn.st-answered { background: var(--ex-ok-bg); border-color: var(--ex-ok-bd); color: var(--ex-ok); }
.ex-pal-btn.st-unanswered { background: var(--ex-no-bg); border-color: var(--ex-no-bd); color: var(--ex-no); }
.ex-pal-btn.st-unvisited { background: var(--bare); color: var(--muted); }
.ex-pal-btn.st-marked { background: var(--ex-mk-bg); border-color: var(--ex-mk-bd); color: var(--ex-mk); }
.ex-pal-btn.st-marked-answered { background: var(--ex-mk-bg); border-color: var(--ex-mk-bd); color: var(--ex-mk); box-shadow: inset 0 0 0 2px var(--ex-mk); }
.ex-pal-btn:disabled { opacity: .45; cursor: not-allowed; }

.ex-legend { display: flex; flex-wrap: wrap; gap: 6px 12px; padding: 10px 16px; border-top: 1px solid var(--border); font-size: 11px; color: var(--muted); }
.ex-lg-row { display: inline-flex; align-items: center; gap: 5px; }
.ex-lg-box { width: 12px; height: 12px; border-radius: 4px; border: 1px solid var(--border); }
.ex-pal-submit { margin: 6px 16px 16px; width: calc(100% - 32px); }
.ex-pal-toggle { display: none; }

/* ------------------------------------------------------------ question */
.ex-qcard {
  width: 100%; max-width: 920px; margin: 0 auto;
  padding: 24px 28px 8px; background: transparent !important;
  border: 0 !important; box-shadow: none !important; flex: 1 1 auto;
}
.ex-qhead { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.ex-qhead-l { font-size: 16px; font-weight: 800; color: var(--text); }
.ex-qhead-m { margin-left: auto; font-size: 12px; color: var(--muted); }
.ex-stem { display: block; font-size: 17.5px; line-height: 1.62; font-weight: 550; color: var(--text); }
.ex-stem .katex { font-size: 1.02em; }

.ex-opts { display: flex; flex-direction: column; gap: 10px; margin-top: 20px; }
.ex-opt {
  display: flex; align-items: flex-start; gap: 12px; width: 100%;
  padding: 14px 16px; text-align: left;
  background: var(--card); border: 1.5px solid var(--border); border-radius: 14px;
  cursor: pointer;
  transition: border-color .16s var(--os-ease, ease), background .16s var(--os-ease, ease), box-shadow .16s var(--os-ease, ease);
}
.ex-opt:hover { border-color: var(--brand); background: var(--brand-soft); }
.ex-optl {
  display: grid; place-items: center; flex: 0 0 28px; width: 28px; height: 28px;
  border-radius: 8px; background: var(--bare); border: 1px solid var(--border);
  font-size: 12.5px; font-weight: 750; color: var(--muted);
}
.ex-optbody { font-size: 15.5px; line-height: 1.5; color: var(--text); }
.ex-opt.on { border-color: var(--brand); background: var(--brand-soft); box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand) 12%, transparent); }
.ex-opt.on .ex-optl { background: var(--brand); border-color: var(--brand); color: #fff; }
.ex-secnote { margin-top: 14px; font-size: 12.5px; color: var(--muted); }

/* controls — niche chipka hua bar */
.ex-actions {
  position: sticky; bottom: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding: 14px 28px calc(14px + env(safe-area-inset-bottom, 0px));
  background: color-mix(in srgb, var(--card) 94%, transparent);
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-top: 1px solid var(--border); margin-top: 16px;
}
.ex-actions .btn { border-radius: 12px; }
.ex-actions .btn-primary { box-shadow: 0 6px 18px color-mix(in srgb, var(--brand) 22%, transparent); }

/* ------------------------------------------------------------ mobile */
@media (max-width: 980px) {
  .ex-body { grid-template-columns: minmax(0, 1fr); }
  .ex-pal-left .ex-body, .ex-pal-right .ex-body { grid-template-columns: minmax(0, 1fr); }
  .ex-pal {
    position: fixed; inset: auto 0 0 0; z-index: 60;
    max-height: 80vh; border-left: 0 !important; border-right: 0 !important;
    border-top: 1px solid var(--border); border-radius: 18px 18px 0 0;
    box-shadow: 0 -18px 44px rgba(15, 23, 42, .18);
    transform: translateY(102%); transition: transform .24s var(--os-ease, ease);
  }
  .ex-pal-open .ex-pal { transform: translateY(0); }
  .ex-pal-toggle { display: inline-flex; }
  .ex-qcard { padding: 18px 16px 8px; }
  .ex-stem { font-size: 16.5px; }
  .ex-actions { padding: 12px 16px calc(12px + env(safe-area-inset-bottom, 0px)); gap: 8px; }
  .ex-hrow { padding: 8px 14px; gap: 10px; }
  .ex-clock { padding: 6px 10px; gap: 8px; }
  .ex-clock-num { font-size: 16px; }
  .ex-strip { padding: 6px 14px; }
  .ex-strip-c { margin: 0; }
}

/* styles.css desktop me .ex-pal-*-right .ex-body ko 268px deta hai (2-class
   specificity) — yahan wahi selectors barabar/zara upar se TodoXMock ki
   chaudai (322px) lagate hain, aur palette ko poori unchai tak khinch kar. */
@media (min-width: 981px) {
  .ex-body { padding: 0; gap: 0; align-items: stretch; }
  .ex-pal-left  .ex-body { grid-template-columns: 322px minmax(0, 1fr); }
  .ex-pal-right .ex-body { grid-template-columns: minmax(0, 1fr) 322px; }
  .ex-pal { min-width: 322px; }
}