/* ============================================================
   TestSeriesPoint — Bilingual Question Display CSS
   question-bilingual.css | v3.0
   Covers: exam_index, question_detail_assignment, quiz pages
   ============================================================ */

:root {
  --navy:      #06102a;
  --indigo:    #4f46e5;
  --indigo2:   #6366f1;
  --violet:    #7c3aed;
  --orange:    #f97316;
  --amber:     #fbbf24;
  --green:     #16a34a;
  --green-bg:  #f0fdf4;
  --red:       #dc2626;
  --red-bg:    #fef2f2;
  --surface:   #f0f4ff;
  --white:     #ffffff;
  --border:    #e2e8f0;
  --text:      #0f172a;
  --text2:     #334155;
  --muted:     #64748b;
  --r:         10px;
  --shadow:    0 2px 8px rgba(0,0,0,.06), 0 6px 24px rgba(79,70,229,.09);
  --transition: .2s cubic-bezier(.4,0,.2,1);
}

/* ── Lang Bar ───────────────────────────────────── */
.lang-bar {
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 10px 20px;
  position: sticky;
  top: 0;
  z-index: 50;
}
.lang-bar-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.lang-grp {
  display: flex;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.lang-opt {
  padding: 6px 18px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  background: none;
  color: var(--muted);
  transition: all .15s;
}
.lang-opt.active { background: var(--indigo); color: #fff; }
.lang-label { font-size: 13px; font-weight: 600; color: var(--muted); }
.filter-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #eef2ff;
  color: var(--indigo);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
}

/* ── Question Card ─────────────────────────────── */
.q-card {
  background: #fff;
  border-radius: var(--r);
  border: 1px solid var(--border);
  padding: 20px 22px;
  margin-bottom: 14px;
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition);
  /* FIX: keeps this card clear of the sticky .lang-bar (position:sticky;
     top:0; z-index:50) when scrolled to — e.g. via the solution's
     scrollIntoView() call in tspAnswer(). Without this, a card's top
     edge (question-number badge, first option row) can end up tucked
     underneath the bar, where its clicks get intercepted instead of
     reaching the option button underneath. ~46px ≈ lang-bar's rendered
     height + a small buffer. */
  scroll-margin-top: 56px;
}
.q-card:hover { box-shadow: 0 8px 24px rgba(79,70,229,.13); }

.q-num-bar { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.q-num {
  background: linear-gradient(135deg, var(--indigo), var(--violet));
  color: #fff;
  width: 28px; height: 28px;
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 800; flex-shrink: 0;
}
.q-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.q-tag {
  padding: 2px 9px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 700;
}
.q-tag-en  { background: #ede9fe; color: #5b21b6; }
.q-tag-hi  { background: #fef3c7; color: #92400e; }
.q-tag-both{ background: #d1fae5; color: #065f46; }
.q-tag-lvl { background: #f1f5f9; color: #475569; }

/* ── Question Text Bilingual ─────────────────── */
.q-text-en {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.6;
  margin-bottom: 6px;
}
.q-text-hi {
  font-size: 14px;
  color: var(--text2);
  line-height: 1.7;
  font-family: 'Noto Sans Devanagari', sans-serif;
  margin-bottom: 10px;
  background: #fafaf9;
  padding: 8px 12px;
  border-left: 3px solid var(--amber);
  border-radius: 0 6px 6px 0;
}
.q-text-en.hidden, .q-text-hi.hidden { display: none !important; }

/* ── Options Grid ───────────────────────────── */
.q-opts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 10px;
}
@media (max-width: 600px) { .q-opts { grid-template-columns: 1fr; } }

.opt-item {
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: flex-start;
  gap: 10px;
  user-select: none;
  font-size: 14px;
  line-height: 1.5;
  position: relative;
  background: #fafbff;
}
.opt-item:hover {
  border-color: var(--indigo);
  background: #eef2ff;
  transform: translateX(2px);
}
.opt-item:focus-visible { outline: 2px solid var(--indigo); outline-offset: 2px; }
.opt-item[aria-disabled="true"] { pointer-events: none; }

/* Option key bubble */
.opt-key {
  width: 26px; height: 26px;
  border-radius: 6px;
  border: 2px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 800;
  color: var(--muted);
  flex-shrink: 0;
  transition: all var(--transition);
  margin-top: 1px;
}

/* Option text bilingual */
.opt-text { flex: 1; }
.opt-en { display: block; font-size: 14px; color: var(--text2); }
.opt-hi {
  display: block;
  font-size: 12.5px;
  color: var(--muted);
  margin-top: 3px;
  font-family: 'Noto Sans Devanagari', sans-serif;
  border-top: 1px dashed #e2e8f0;
  padding-top: 3px;
}
.opt-en.hidden, .opt-hi.hidden { display: none !important; }

/* ── Answer States ─────────────────────────── */
.opt-item.correct {
  border-color: #86efac !important;
  background: var(--green-bg) !important;
}
.opt-item.correct .opt-key {
  background: var(--green);
  border-color: var(--green);
  color: #fff;
  box-shadow: 0 3px 8px rgba(22,163,74,.35);
}

.opt-item.wrong {
  border-color: #fca5a5 !important;
  background: var(--red-bg) !important;
}
.opt-item.wrong .opt-key {
  background: var(--red);
  border-color: var(--red);
  color: #fff;
  box-shadow: 0 3px 8px rgba(220,38,38,.35);
}

/* ── Solution Box ──────────────────────────── */
.q-solution {
  display: none;
  margin-top: 10px;
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-left: 3px solid var(--amber);
  border-radius: 0 8px 8px 0;
  padding: 12px 14px;
  font-size: 13px;
  color: #78350f;
  line-height: 1.7;
}
.q-solution.show { display: block; animation: fadeIn .2s ease; }
.q-solution-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: #92400e;
  margin-bottom: 8px;
}
.q-sol-en { display: block; }
.q-sol-hi {
  display: block;
  margin-top: 6px;
  font-family: 'Noto Sans Devanagari', sans-serif;
  font-size: 13px;
  border-top: 1px dashed #fde68a;
  padding-top: 6px;
}
.q-sol-en.hidden, .q-sol-hi.hidden { display: none !important; }

/* ── Keyframes ─────────────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Auto Quiz Button ─────────────────────── */
.tsp-auto-quiz-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--orange), #fb923c);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  padding: 11px 22px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition);
  box-shadow: 0 4px 16px rgba(249,115,22,.4);
}
.tsp-auto-quiz-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(249,115,22,.5);
  color: #fff;
}
.tsp-auto-quiz-btn.loading { opacity: .7; pointer-events: none; }