/* ── Reset & Base ─────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

body {
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 20px;
  line-height: 1.5;
  margin: 0;
  padding: 0;
  background: #f8f9fa;
  color: #1a1a1a;
  /* Landscape: fill viewport height */
  height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden; /* No scrolling — one card at a time */
}

/* ── Header ───────────────────────────── */
.quiz-header {
  padding: 0.8rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
  flex-shrink: 0;
}
.quiz-header h1 { font-size: 1.1rem; margin: 0; }
.quiz-header .back { color: #7c3aed; text-decoration: none; font-size: 0.95rem; }
.section-label {
  font-size: 0.8rem;
  color: #7c3aed;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

/* ── Card area (fills remaining space) ── */
.card-area {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2rem;
  overflow-y: auto;
}

.card {
  display: none; /* JS shows active card */
  width: 100%;
  max-width: 800px;
  background: #fff;
  border-radius: 16px;
  padding: 2rem 2.5rem;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}
.card.active { display: block; }

.card .prompt {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

/* ── Option buttons (single/multi select) */
.options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}
.options .opt-btn {
  padding: 0.8rem 1.6rem;
  font-size: 1.1rem;
  border: 2px solid #e5e7eb;
  border-radius: 12px;
  background: #fff;
  cursor: pointer;
  transition: all 0.15s;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}
.opt-btn:active { transform: scale(0.97); }
.opt-btn.selected {
  background: #f3f0ff;
  border-color: #7c3aed;
  color: #7c3aed;
  font-weight: 600;
}
.opt-btn.correct {
  background: #ecfdf5 !important;
  border-color: #10b981 !important;
  color: #065f46 !important;
}
.opt-btn.wrong {
  background: #fef2f2 !important;
  border-color: #ef4444 !important;
  color: #991b1b !important;
}
.opt-btn.missed {
  /* Correct answer the user didn't pick */
  background: #ecfdf5 !important;
  border-color: #10b981 !important;
  color: #065f46 !important;
  opacity: 0.7;
}
.opt-btn.disabled { pointer-events: none; opacity: 0.5; }

/* ── Word Bank ────────────────────────── */
.word-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
}
.word-bank .wb-word {
  padding: 0.6rem 1.2rem;
  font-size: 1.05rem;
  border: 2px solid #7c3aed;
  border-radius: 10px;
  background: #f3f0ff;
  color: #7c3aed;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.15s;
}
.wb-word.used {
  opacity: 0.3;
  pointer-events: none;
  border-color: #ccc;
  color: #999;
  background: #f9fafb;
}
.wb-sentences { display: flex; flex-direction: column; gap: 0.8rem; }
.wb-sentence {
  font-size: 1.05rem;
  line-height: 1.6;
}
.wb-slot {
  display: inline-block;
  min-width: 100px;
  padding: 0.3rem 0.8rem;
  border-bottom: 2px solid #7c3aed;
  text-align: center;
  cursor: pointer;
  font-weight: 600;
  color: #7c3aed;
  transition: background 0.15s;
  border-radius: 4px;
}
.wb-slot:empty { color: transparent; }
.wb-slot:empty::after { content: "___"; color: #ccc; font-weight: 400; }
.wb-slot.correct { background: #ecfdf5; border-color: #10b981; color: #065f46; }
.wb-slot.wrong { background: #fef2f2; border-color: #ef4444; color: #991b1b; }

/* ── Order (click-to-sort) ────────────── */
.order-pool, .order-sorted {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  min-height: 3rem;
}
.order-sorted { margin-top: 1rem; border-top: 2px dashed #e5e7eb; padding-top: 1rem; }
.order-item {
  padding: 0.7rem 1.2rem;
  font-size: 1rem;
  border: 2px solid #e5e7eb;
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  transition: all 0.15s;
}
.order-item:active { transform: scale(0.98); }
.order-sorted .order-item {
  border-color: #7c3aed;
  background: #f3f0ff;
}
.order-sorted .order-item::before {
  font-weight: 700;
  color: #7c3aed;
  margin-right: 0.5rem;
}
.order-sorted .order-item:nth-child(1)::before { content: "\2460 "; }
.order-sorted .order-item:nth-child(2)::before { content: "\2461 "; }
.order-sorted .order-item:nth-child(3)::before { content: "\2462 "; }
.order-sorted .order-item:nth-child(4)::before { content: "\2463 "; }
.order-item.correct { background: #ecfdf5 !important; border-color: #10b981 !important; }
.order-item.wrong { background: #fef2f2 !important; border-color: #ef4444 !important; }

/* ── Feedback overlay ─────────────────── */
.feedback {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.15);
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.feedback.show { display: flex; }
.feedback-inner {
  background: #fff;
  border-radius: 20px;
  padding: 2rem 3rem;
  text-align: center;
  font-size: 1.5rem;
  font-weight: 700;
  box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}
.feedback-inner.is-correct { color: #059669; }
.feedback-inner.is-wrong { color: #dc2626; }

/* ── Nav bar ──────────────────────────── */
.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 1.5rem;
  background: #fff;
  border-top: 1px solid #e5e7eb;
  flex-shrink: 0;
}
.nav-bar button {
  padding: 0.7rem 1.8rem;
  font-size: 1.1rem;
  font-weight: 600;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.nav-bar .btn-prev { background: #e5e7eb; color: #374151; }
.nav-bar .btn-next { background: #7c3aed; color: #fff; }
.nav-bar .btn-prev:disabled,
.nav-bar .btn-next:disabled { opacity: 0.3; pointer-events: none; }
.nav-bar .progress { font-size: 1rem; color: #6b7280; font-weight: 600; }

/* ── Summary card ─────────────────────── */
.summary { text-align: center; }
.summary .score-big {
  font-size: 3rem;
  font-weight: 800;
  color: #7c3aed;
  margin: 1rem 0;
}
.summary .btn-restart {
  padding: 0.8rem 2rem;
  font-size: 1.1rem;
  background: #7c3aed;
  color: #fff;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
}

/* ── Responsive: portrait fallback ────── */
@media (max-width: 768px) {
  body { font-size: 17px; }
  .card { padding: 1.5rem; }
  .card .prompt { font-size: 1.15rem; }
  .card-area { padding: 0.8rem 1rem; }
}