/* =====================================================
   DPBT MASTER – Matching Game Styles
   ===================================================== */

/* ---- Layout ---- */
.matching-game-header {
  background: var(--glass); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1rem 1.2rem;
  margin-bottom: 1.2rem;
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 0.8rem;
}
.matching-game-title { font-size: 1rem; font-weight: 700; }
.matching-game-subtitle { font-size: 0.78rem; color: var(--text2); }
.matching-score-pill {
  background: rgba(16,185,129,0.15); border: 1px solid rgba(16,185,129,0.3);
  border-radius: 20px; padding: 0.3rem 0.9rem;
  font-size: 0.82rem; font-weight: 700; color: var(--green-l);
}
.matching-instructions {
  font-size: 0.82rem; color: var(--text2);
  background: var(--glass); border: 1px solid var(--border);
  border-radius: var(--radius-s); padding: 0.6rem 0.9rem;
  margin-bottom: 1rem;
}

/* ---- Two-column board ---- */
.matching-board {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  margin-bottom: 1.2rem;
}

/* Left column: draggable terms */
.matching-col-left, .matching-col-right { display: flex; flex-direction: column; gap: 0.55rem; }
.matching-col-label {
  font-size: 0.7rem; font-weight: 700; color: var(--text3);
  text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 0.3rem;
}

.matching-term {
  background: var(--glass);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-s);
  padding: 0.7rem 0.85rem;
  font-size: 0.88rem; font-weight: 600; color: var(--text);
  cursor: grab; user-select: none;
  transition: var(--transition);
  display: flex; align-items: center; gap: 0.5rem;
  position: relative;
}
.matching-term:hover { border-color: var(--purple); background: rgba(124,58,237,0.08); transform: translateX(-2px); }
.matching-term.dragging { opacity: 0.35; cursor: grabbing; transform: scale(0.96); }
.matching-term.used { opacity: 0.3; cursor: not-allowed; pointer-events: none; }
.matching-term.correct-snap { border-color: var(--green) !important; background: rgba(16,185,129,0.1) !important; }
.matching-term.wrong-snap   { border-color: var(--red) !important; background: rgba(239,68,68,0.08) !important; animation: shake 0.35s ease; }
.matching-term-drag-icon { font-size: 0.85rem; color: var(--text3); flex-shrink: 0; }

/* Right column: drop zones */
.matching-slot {
  background: var(--glass);
  border: 1.5px dashed var(--border);
  border-radius: var(--radius-s);
  min-height: 46px;
  padding: 0.5rem 0.85rem;
  font-size: 0.88rem; color: var(--text);
  transition: var(--transition);
  display: flex; align-items: center; gap: 0.5rem;
  position: relative;
}
.matching-slot-label {
  font-size: 0.78rem; color: var(--text2); font-weight: 600;
  pointer-events: none;
}
.matching-slot-definition {
  font-size: 0.75rem; color: var(--text2); margin-top: 0.15rem;
}
.matching-slot-info { flex: 1; }
.matching-slot.drag-over { border-color: var(--purple); background: rgba(124,58,237,0.1); border-style: solid; }
.matching-slot.filled { border-style: solid; border-color: var(--cyan); background: rgba(6,182,212,0.06); }
.matching-slot.slot-correct { border-color: var(--green) !important; background: rgba(16,185,129,0.1) !important; animation: flash-green 0.4s ease; }
.matching-slot.slot-wrong   { border-color: var(--red) !important; background: rgba(239,68,68,0.08) !important; animation: shake 0.35s ease; }

.matching-slot-answer {
  background: rgba(124,58,237,0.15); border: 1px solid rgba(124,58,237,0.3);
  border-radius: 4px; padding: 0.2rem 0.5rem;
  font-size: 0.82rem; font-weight: 600; color: var(--purple-l);
  display: inline-flex; align-items: center; gap: 0.3rem;
}
.matching-slot-answer .remove-btn {
  background: none; font-size: 0.7rem; color: var(--text3);
  padding: 0; line-height: 1; cursor: pointer;
}
.matching-slot-answer .remove-btn:hover { color: var(--red-l); }

/* Check button */
.matching-check-row {
  display: flex; justify-content: flex-end; gap: 0.8rem;
  margin-top: 1rem;
}

/* Results display */
.matching-result-row {
  display: flex; align-items: center; gap: 0.6rem;
  padding: 0.6rem 0.8rem;
  border-radius: var(--radius-s);
  font-size: 0.88rem; margin-bottom: 0.4rem;
}
.matching-result-row.res-correct { background: rgba(16,185,129,0.08); border: 1px solid rgba(16,185,129,0.2); }
.matching-result-row.res-wrong   { background: rgba(239,68,68,0.06); border: 1px solid rgba(239,68,68,0.2); }
.res-icon { font-size: 1rem; flex-shrink: 0; }
.res-term { font-weight: 600; color: var(--text); margin-right: 0.3rem; }
.res-arrow { color: var(--text3); margin: 0 0.3rem; }
.res-correct-ans { color: var(--green-l); font-weight: 600; }
.res-wrong-ans   { color: var(--red-l); text-decoration: line-through; }

/* Matching completion card */
.matching-complete-card {
  background: var(--glass); border: 1px solid rgba(16,185,129,0.3);
  border-radius: var(--radius-xl); padding: 2.5rem 2rem;
  text-align: center; margin-top: 1.5rem;
  animation: pop-in 0.4s cubic-bezier(0.34,1.56,0.64,1);
}
.matching-complete-icon { font-size: 4rem; display: block; margin-bottom: 1rem; }
.matching-complete-score {
  font-size: 3.5rem; font-weight: 900;
  background: var(--grad-green); -webkit-background-clip: text;
  -webkit-text-fill-color: transparent; background-clip: text;
}
.matching-complete-label { color: var(--text2); font-size: 0.9rem; margin-bottom: 1.2rem; }
.matching-complete-actions { display: flex; gap: 0.8rem; justify-content: center; flex-wrap: wrap; }

/* Explanation section (after matching) */
.matching-explanation-section {
  background: var(--glass); border: 1px solid var(--border);
  border-radius: var(--radius-l); padding: 1.4rem;
  margin-top: 1.5rem;
}
.matching-explanation-section h3 {
  font-size: 0.85rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--text2); margin-bottom: 1rem;
}
.matching-explanation-item { margin-bottom: 0.8rem; padding-bottom: 0.8rem; border-bottom: 1px solid var(--border); }
.matching-explanation-item:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.matching-explanation-item .exp-pair { font-size: 0.9rem; font-weight: 600; margin-bottom: 0.3rem; }
.matching-explanation-item .exp-pair .term { color: var(--cyan-l); }
.matching-explanation-item .exp-pair .def  { color: var(--purple-l); }
.matching-explanation-item .exp-text { font-size: 0.83rem; color: var(--text2); line-height: 1.5; }

/* Mobile matching layout */
@media (max-width: 560px) {
  .matching-board { grid-template-columns: 1fr; }
  .matching-col-left .matching-term { cursor: pointer; }
  .matching-col-left .matching-term:hover { transform: none; }
  .matching-col-right .matching-slot.active-target { border-color: var(--purple); background: rgba(124,58,237,0.08); }
}