/* ============================================
   LESSON 21 — SPECIFIC STYLES
   Recognising Attitude Vocabulary
   ============================================ */

/* ── Part 1: Question box ── */
.l21-question-box {
  padding: 14px 18px;
  background: var(--bg-card-2);
  border: 1.5px solid var(--border);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 20px;
}

/* ── Part 1: Option buttons ── */
.l21-opt-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 8px;
}
.l21-opt-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 13px 16px;
  background: var(--bg-card-2);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  cursor: pointer;
  text-align: left;
  transition: border-color .15s, background .15s;
}
.l21-opt-btn:hover:not(:disabled) { border-color: var(--gold); background: rgba(201,168,76,.05); }
.l21-opt-letter {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 800;
  color: var(--gold);
  flex-shrink: 0;
  transition: background .15s, border-color .15s;
}
.l21-opt-text { flex: 1; font-weight: 500; }
.l21-opt-sel     { border-color: var(--gold)    !important; background: rgba(201,168,76,.08) !important; }
.l21-opt-correct { border-color: var(--success) !important; background: rgba(74,222,128,.07) !important; }
.l21-opt-wrong   { border-color: var(--error)   !important; background: rgba(248,113,113,.07) !important; }
.l21-opt-btn:disabled { cursor: not-allowed; opacity: .75; }

/* ── Part 2: Row layout ── */
.l21-p2-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 8px;
}
.l21-p2-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.l21-p2-label {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: .07em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 12px;
  white-space: nowrap;
  flex-shrink: 0;
}
.l21-label-sur   { background: rgba(251,191,36,.12); color: #fbbf24; border: 1.5px solid rgba(251,191,36,.35); }
.l21-label-unsur { background: rgba(148,163,184,.12); color: #94a3b8; border: 1.5px solid rgba(148,163,184,.3); }

.l21-p2-inp {
  flex: 1;
  min-width: 200px;
  padding: 9px 14px;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
  font-weight: 500;
  outline: none;
  transition: border-color .15s, background .15s;
}
.l21-p2-inp:focus      { border-color: var(--gold); }
.l21-p2-inp.l21-correct{ border-color: var(--success); background: rgba(74,222,128,.07); color: var(--success); }
.l21-p2-inp.l21-wrong  { border-color: var(--error);   background: rgba(248,113,113,.07); }

.l21-hint {
  font-size: 1rem;
  color: var(--text-muted);
  font-style: italic;
  margin-top: 4px;
}

/* ── Inline explanation panels ── */
.l21-p1-exp, .l21-p2-exp {
  margin: 6px 0 12px 0;
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: .97rem;
  line-height: 1.6;
  border: 1px solid var(--border);
}
.l21-p1-exp-ok, .l21-p2-exp-ok   { background: rgba(72,199,116,.08); border-color: var(--success); }
.l21-p1-exp-err, .l21-p2-exp-err { background: rgba(255,100,100,.07); border-color: var(--error); }

/* ── Two-input row ── */
.l21-p2-inputs {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  flex: 1;
}
.l21-p2-inputs .l21-p2-inp { flex: 1; min-width: 100px; }

/* ── Explanation ── */
.l21-exp-bank {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-card-2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
}
.l21-exp-bank-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.l21-chip-row { display: flex; flex-wrap: wrap; gap: 8px; }

.l21-exp-list { display: flex; flex-direction: column; gap: 8px; }
.l21-exp-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--bg-card-2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  flex-wrap: wrap;
}
.l21-exp-phrase  { font-weight: 700; color: var(--text); font-size: 1rem; }
.l21-exp-arrow   { color: var(--gold); font-size: .97rem; }
.l21-exp-meaning { color: var(--text-muted); font-size: 1rem; }

/* ── Chips ── */
.l21-phrase-grid, .l21-chip-row { display: flex; flex-wrap: wrap; gap: 8px; }

.l21-chip {
  padding: 5px 12px;
  border-radius: 14px;
  font-size: .8rem;
  font-weight: 600;
  border: 1.5px solid var(--border);
  background: var(--bg-card);
  color: var(--text-muted);
}
.l21-chip-sur   { border-color: rgba(251,191,36,.4);  color: #fbbf24; background: rgba(251,191,36,.08);  }
.l21-chip-unsur { border-color: rgba(148,163,184,.4); color: #94a3b8; background: rgba(148,163,184,.08); }

/* ── Study Tip ── */
.l21-tip-box { display: flex; flex-direction: column; gap: 14px; }
.l21-tip-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 14px 16px;
  background: var(--bg-card-2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
}
.l21-tip-icon  { font-size: 1.2rem; flex-shrink: 0; margin-top: 1px; }
.l21-tip-title { font-weight: 700; color: var(--gold); margin-bottom: 4px; font-size: 1rem; }
.l21-tip-body  { color: var(--text-muted); font-size: .97rem; line-height: 1.55; margin: 0; }

.l21-phrase-grid { margin-top: 8px; }

/* ── Shake animation ── */
@keyframes l21-shake {
  0%,100% { transform: translateX(0); }
  20%     { transform: translateX(-6px); }
  40%     { transform: translateX(6px); }
  60%     { transform: translateX(-4px); }
  80%     { transform: translateX(4px); }
}
.l21-shake { animation: l21-shake .4s ease; }