/* ─── INTRO PANEL ──────────────────────────────────────────────── */
.intro {
  background: var(--paper);
  border: 1px solid var(--hairline);
  border-top: 4px solid var(--accent);
  padding: 16px 18px;
  margin-bottom: 28px;
  border-radius: 2px;
}
.intro-title { font-weight: 700; font-size: 1rem; margin-bottom: 8px; }
.intro-body { font-size: 0.92rem; }
.intro-meta { color: var(--muted-deep); font-size: 0.85rem; margin-top: 8px; font-style: italic; }

/* ─── EXERCISE SECTION ────────────────────────────────────────── */
section.exercise { margin-top: 38px; }
.ex-head {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 2px;
}
.ex-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--navy);
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 4px;
}
.ex-meta {
  font-size: 0.74rem;
  color: var(--muted);
  letter-spacing: 0.5px;
  margin-bottom: 14px;
  font-family: var(--font-sans);
}
.ex-instruct {
  font-size: 0.92rem;
  color: var(--navy);
  margin-bottom: 16px;
  font-weight: 500;
}

/* ─── QUESTION ITEMS ──────────────────────────────────────────── */
.q {
  margin-bottom: 22px;
  padding: 14px 14px 14px 44px;
  background: var(--paper);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  position: relative;
}
.q-num {
  position: absolute;
  left: 12px;
  top: 14px;
  font-weight: 700;
  color: var(--accent);
  font-family: var(--font-sans);
  font-size: 0.95rem;
}
.q-text { font-size: 0.98rem; line-height: 1.5; margin-bottom: 10px; }
.q-hint { font-size: 0.8rem; color: var(--muted); font-style: italic; margin-left: 6px; }
.q-keyword {
  display: inline-block;
  background: var(--cream-deep);
  border: 1px solid var(--border);
  padding: 2px 10px;
  border-radius: 3px;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--navy);
  margin-left: 4px;
  vertical-align: 2px;
}

/* ─── INPUTS ──────────────────────────────────────────────────── */
input[type="text"] {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  font-size: 1rem;
  border: 1px solid #C8D4E0;
  border-radius: 4px;
  background: var(--offwhite);
  color: var(--navy);
  font-family: var(--font-serif);
  transition: border-color 0.15s, background 0.15s;
}
input[type="text"]:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--paper);
}

.choice-group { display: flex; gap: 8px; margin-top: 8px; }
.choice-btn {
  flex: 1;
  min-height: 46px;
  padding: 10px 6px;
  border: 1.5px solid var(--hairline);
  background: var(--paper);
  color: var(--navy);
  font-size: 0.92rem;
  font-weight: 500;
  border-radius: 6px;
  cursor: pointer;
  font-family: var(--font-serif);
  transition: all 0.15s;
}
.choice-btn:active { transform: scale(0.97); }
.choice-btn.selected {
  background: rgba(184,134,11,0.12);
  color: var(--ink);
  border-color: var(--amber);
  font-weight: 700;
}

select {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  font-size: 1rem;
  border: 1px solid #C8D4E0;
  border-radius: 4px;
  background: var(--offwhite);
  color: var(--navy);
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%238899AA' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

textarea {
  width: 100%;
  min-height: 72px;
  padding: 10px 12px;
  font-size: 1rem;
  border: 1px solid #C8D4E0;
  border-radius: 4px;
  background: var(--offwhite);
  color: var(--navy);
  font-family: var(--font-serif);
  resize: vertical;
  line-height: 1.5;
}
textarea:focus { outline: none; border-color: var(--accent); background: var(--paper); }

/* ─── MATCH ───────────────────────────────────────────────────── */
.match-row {
  display: grid;
  grid-template-columns: 1fr 72px;
  gap: 10px;
  align-items: center;
  margin-bottom: 10px;
}
.match-text {
  font-size: 0.92rem;
  padding: 10px 12px;
  background: var(--paper);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  line-height: 1.4;
}
.match-options {
  margin-top: 14px;
  padding: 12px;
  background: var(--cream-deep);
  border-radius: 4px;
  font-size: 0.85rem;
  line-height: 1.8;
  color: #444;
}
.match-options strong { color: var(--accent); }

/* ─── SUBMIT ──────────────────────────────────────────────────── */
.submit-wrap {
  gap: 12px;
  margin-top: 48px;
  padding: 24px;
  background: var(--navy);
  border-radius: 6px;
  text-align: center;
}
.submit-wrap p { color: #A8B4C6; font-size: 0.88rem; margin-bottom: 16px; }
button.submit {
  background: var(--accent);
  color: white;
  padding: 16px 40px;
  font-size: 1.1rem;
  font-weight: 700;
  border-radius: 4px;
  min-height: 52px;
  letter-spacing: 0.5px;
  font-family: var(--font-sans);
  text-transform: uppercase;
  width: 100%;
}
button.submit:active { background: var(--accent-dark); }
button.reset {
  background: transparent;
  color: #A8B4C6;
  border: 1px solid #3A4A6A;
  padding: 10px 20px;
  font-size: 0.85rem;
  border-radius: 4px;
  margin-top: 14px;
  font-family: var(--font-sans);
}

/* ─── RESULTS ─────────────────────────────────────────────────── */
.results-panel {
  display: none;
  margin-top: 32px;
  background: var(--paper);
  border: 2px solid var(--navy);
  border-radius: 6px;
  padding: 24px;
}
.results-panel.show { display: block; }
.score-display {
  text-align: center;
  padding: 24px 16px;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%);
  color: white;
  border-radius: 4px;
  margin-bottom: 20px;
}
.score-display .big {
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1;
  font-family: var(--font-serif);
  margin-bottom: 4px;
}
.score-display .big span { color: var(--accent); }
.score-display .label {
  font-size: 0.8rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: #A8B4C6;
  font-family: var(--font-sans);
}
.score-display .pct { font-size: 1.1rem; margin-top: 12px; color: var(--accent); font-weight: 700; }
.breakdown h3 { font-family: var(--font-serif); font-size: 1.2rem; margin-bottom: 12px; color: var(--navy); }
.breakdown-ex { margin-bottom: 20px; padding-bottom: 14px; border-bottom: 1px solid var(--border-soft); }
.breakdown-ex:last-child { border-bottom: none; }
.breakdown-ex h4 { font-size: 0.95rem; color: var(--navy); margin-bottom: 8px; font-weight: 700; }
.breakdown-item { font-size: 0.88rem; padding: 6px 0; display: flex; gap: 10px; align-items: flex-start; }
.breakdown-item .mark { flex-shrink: 0; width: 20px; text-align: center; font-weight: 700; font-size: 1rem; }
.breakdown-item.correct .mark { color: var(--green); }
.breakdown-item.wrong .mark { color: var(--red); }
.breakdown-item.info .mark { color: var(--muted); }
.breakdown-item .content { flex: 1; line-height: 1.5; }
.breakdown-item .your-ans { display: block; font-size: 0.82rem; color: var(--muted); margin-top: 2px; font-style: italic; }
.breakdown-item .correct-ans { display: block; font-size: 0.85rem; color: var(--green); margin-top: 2px; font-weight: 600; }

.submitted input[type="text"]:disabled,
.submitted textarea:disabled,
.submitted select:disabled {
  -webkit-text-fill-color: var(--navy);
  opacity: 1;
}
.submitted .q.correct { border-left: 4px solid var(--green); background: #F4FAF6; }
.submitted .q.wrong { border-left: 4px solid var(--red); background: #FCF4F4; }
.submitted .q.info { border-left: 4px solid var(--muted); background: var(--offwhite); }
.submitted .choice-btn:disabled { cursor: default; opacity: 0.7; }
.submitted .choice-btn.correct-answer { background: var(--green) !important; color: white !important; border-color: var(--green) !important; opacity: 1; }
.submitted .choice-btn.wrong-answer { background: #FCF4F4 !important; color: var(--red) !important; border-color: var(--red) !important; text-decoration: line-through; opacity: 1; }


/* ── Responsive ── */
@media (max-width: 600px) {
  .container { padding: 0 14px 40px; }
  .ex-head { font-size: 0.68rem; }
  .ex-title { font-size: 1rem; }
  .q { padding: 12px 14px; }
  .q-text { font-size: 0.88rem; }
  input[type="text"] { font-size: 0.88rem; max-width: 100%; }
  textarea { font-size: 0.88rem; }
  .choice-group { flex-direction: column; gap: 6px; }
  .choice-btn { width: 100%; text-align: left; padding: 10px 14px; }
  .check-bar { flex-direction: column; }
}

/* ── Worksheet page heading constraint ── */
.container > h1,
.container > .chapter-num,
.container > .subtitle,
.container > .chapter-subtitle {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* ── Results panel ── */
#results { display: none; }
#results.show { display: block; }

/* ── Pass state ── */
.score-pass { color: var(--amber); }
.score-fail { color: var(--ink); }
.pass-msg {
  font-family: var(--font-sans);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--amber);
  margin-top: 8px;
}

/* ── Mobile: question number above, not overlapping ─────────────── */
@media (max-width: 480px) {
  .q {
    padding: 12px 12px 12px 12px;
  }
  .q-num {
    position: static;
    display: inline-block;
    margin-bottom: 6px;
    font-size: .8rem;
  }
}

/* ── Mobile: question number above text to prevent overlap ──────── */
@media (max-width: 480px) {
  .q {
    padding: 12px;
  }
  .q-num {
    position: static;
    display: inline-block;
    margin-bottom: 6px;
    font-size: .8rem;
    font-weight: 800;
  }
}

/* ─── DRAG & DROP (Wordwall-style) ─────────────────────────────── */
.drag-pool{display:flex;flex-wrap:wrap;gap:8px;padding:14px;background:var(--cream-deep);border:1px solid var(--hairline);border-radius:6px;margin-bottom:12px;min-height:48px}
.drag-chip{padding:6px 14px;background:var(--paper);border:1.5px solid var(--hairline);border-radius:20px;font-family:var(--font-sans);font-size:.82rem;font-weight:600;color:var(--ink);cursor:grab;user-select:none;transition:border-color .15s,box-shadow .15s}
.drag-chip:hover{border-color:var(--teal);box-shadow:0 2px 8px rgba(0,0,0,.1)}
.drag-chip.placed{background:rgba(26,122,138,.08);border-color:var(--teal)}
.drag-drop-zone{display:inline-flex;align-items:center;min-width:100px;height:32px;border-bottom:2px solid var(--navy);margin:0 4px;padding:0 8px;font-family:var(--font-sans);font-size:.85rem;color:var(--ink);transition:border-color .15s,background .15s;vertical-align:middle}
.drag-drop-zone.over{border-color:var(--teal);background:rgba(26,122,138,.06)}
.drag-drop-zone.correct{border-color:var(--green,#27ae60);background:rgba(39,174,96,.08)}
.drag-drop-zone.wrong{border-color:var(--red,#c0392b);background:rgba(192,57,43,.08)}

/* Preserve dark text on amber/navy buttons sitewide */


/* ══════════════════════════════════════════════════════════════════
   DARK MODE — WORKSHEET (Batch 21)
   ══════════════════════════════════════════════════════════════════ */

body.dark .exercise {
  background: #1A2230 !important;
  border-color: rgba(255,255,255,.1) !important;
  color: #F0F0F0 !important;
}
body.dark .ex-head    { color: var(--amber) !important; }
body.dark .ex-title   { color: #FFFFFF !important; }
body.dark .ex-meta    { color: #98A8B8 !important; }
body.dark .ex-instruct { color: #C8D4E0 !important; }
body.dark .q          { border-bottom-color: rgba(255,255,255,.08) !important; }
body.dark .q-num      { color: var(--amber) !important; }
body.dark .q-text     { color: #FFFFFF !important; }
body.dark .q-text *   { color: inherit !important; }

body.dark .choice-btn {
  background: rgba(255,255,255,.06) !important;
  border-color: rgba(255,255,255,.2) !important;
  color: #F0F0F0 !important;
}
body.dark .choice-btn:hover {
  background: rgba(255,255,255,.12) !important;
  border-color: var(--amber) !important;
}
body.dark .choice-btn.selected-correct {
  background: rgba(39,174,96,.25) !important;
  border-color: #4CAF82 !important;
  color: #A0E8B0 !important;
}
body.dark .choice-btn.selected-wrong {
  background: rgba(192,57,43,.25) !important;
  border-color: #E05A4A !important;
  color: #FFA090 !important;
}

body.dark .text-input,
body.dark input[type="text"],
body.dark textarea {
  background: rgba(255,255,255,.08) !important;
  border-color: rgba(255,255,255,.25) !important;
  color: #FFFFFF !important;
}
body.dark .text-input:focus,
body.dark input[type="text"]:focus,
body.dark textarea:focus { border-color: var(--amber) !important; }
body.dark .text-input::placeholder { color: #808890 !important; }

body.dark .ws-feedback { color: #C8D4E0 !important; }
body.dark .ws-feedback strong { color: #FFFFFF !important; }

body.dark .results-panel {
  background: #0D1520 !important;
  border-color: rgba(255,255,255,.1) !important;
  color: #F0F0F0 !important;
}
body.dark .results-panel * { color: inherit !important; }
body.dark .results-panel h3 { color: #FFFFFF !important; }
body.dark .results-panel strong { color: var(--amber) !important; }
body.dark .pass-msg { color: #4CAF82 !important; }

body.dark .submit-btn {
  background: var(--amber) !important;
  color: #1A1A1A !important;
  border: none !important;
}
body.dark .submit-btn:hover { background: #D4B060 !important; }

body.dark .reset-btn,
body.dark .secondary-btn {
  background: transparent !important;
  border: 1px solid rgba(255,255,255,.25) !important;
  color: #F0F0F0 !important;
}

body.dark .intro-meta { color: #98A8B8 !important; }
body.dark .submit-wrap { border-top-color: rgba(255,255,255,.1) !important; }

/* Wrong-answer explanation panels */
body.dark .q .q-explanation,
body.dark .q div[style*="border-left"][style*="amber"] {
  background: rgba(201,160,80,.12) !important;
  color: #FFE4A0 !important;
}