:root {
  --bg: #faf7f2;
  --card: #ffffff;
  --ink: #2b2320;
  --muted: #7a6f66;
  --accent: #b5322c;
  --accent-dark: #8c221d;
  --green: #2e7d32;
  --red: #c62828;
  --border: #e6ddd2;
  --shadow: 0 2px 10px rgba(0,0,0,.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--accent);
  color: white;
  padding: .8rem 1.2rem;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar h1 {
  font-size: 1.1rem;
  margin: 0;
  cursor: pointer;
}
.topbar .stats {
  font-size: .85rem;
  opacity: .9;
}

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 1.2rem;
}

h2 { margin-top: 0; }

.section-tabs {
  display: flex;
  gap: .5rem;
  margin-bottom: 1rem;
}
.section-tabs button {
  flex: 1;
  padding: .7rem;
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 10px;
  font-size: 1rem;
  cursor: pointer;
}
.section-tabs button.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.actions-row {
  display: flex;
  gap: .6rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

button.btn {
  padding: .55rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card);
  cursor: pointer;
  font-size: .95rem;
}
button.btn:hover { border-color: var(--accent); }
button.btn.primary {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}
button.btn.primary:hover { background: var(--accent-dark); }
button.btn:disabled { opacity: .4; cursor: default; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: .7rem;
}

.tile {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: .8rem .9rem;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform .08s ease;
}
.tile:hover { transform: translateY(-2px); border-color: var(--accent); }
.tile .num {
  display: inline-block;
  background: var(--accent);
  color: white;
  font-size: .75rem;
  font-weight: bold;
  border-radius: 999px;
  padding: .05rem .5rem;
  margin-bottom: .35rem;
}
.tile .title { font-weight: 600; }
.tile .meta { font-size: .78rem; color: var(--muted); margin-top: .3rem; }
.tile .badge-noanswers {
  display: inline-block;
  margin-top: .3rem;
  font-size: .72rem;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0 .35rem;
}

.progress {
  font-size: .9rem;
  color: var(--muted);
  margin-bottom: .6rem;
}
.progress-bar {
  height: 6px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 1rem;
}
.progress-bar > div {
  height: 100%;
  background: var(--accent);
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.2rem 1.3rem;
  box-shadow: var(--shadow);
  min-height: 220px;
}
.card .instruction {
  font-weight: 600;
  margin-bottom: .8rem;
  color: var(--accent-dark);
}
.card .body-text {
  white-space: pre-wrap;
  font-size: 1rem;
}
.card .answer-block {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--border);
}
.card .answer-block .label {
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--green);
  font-weight: 700;
  margin-bottom: .3rem;
}
.card .no-answer {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--border);
  color: var(--muted);
  font-style: italic;
}

.qmd-table {
  border-collapse: collapse;
  margin: .5rem 0;
  width: 100%;
}
.qmd-table th, .qmd-table td {
  border: 1px solid var(--border);
  padding: .3rem .5rem;
  text-align: left;
  font-size: .92rem;
}
.qmd-table th { background: #f4ede4; }

.word-bank {
  background: #fdfaf5;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: .75rem .9rem;
  margin-bottom: 1.1rem;
}
.word-bank-header {
  font-size: .8rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .04em;
  margin-bottom: .5rem;
}
.word-bank-chips {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
}
.bank-chip {
  display: inline-block;
  padding: .25rem .75rem;
  background: #ffffff;
  border: 1.5px solid var(--border);
  border-radius: 999px;
  font-size: .92rem;
  font-weight: 500;
  color: var(--ink);
  cursor: grab;
  user-select: none;
  transition: all .12s ease;
}
.bank-chip:hover:not(.disabled) {
  border-color: var(--accent);
  background: #fff8f0;
  transform: translateY(-1px);
}
.bank-chip.active-chip {
  border-color: var(--accent);
  background: var(--accent);
  color: white;
  box-shadow: 0 0 0 3px rgba(181, 50, 44, 0.2);
}
.bank-chip.used {
  opacity: .45;
  background: #f1ede7;
  border-style: dashed;
  text-decoration: line-through;
}
.bank-chip.disabled {
  cursor: default;
}

.fill-lines { display: flex; flex-direction: column; gap: .55rem; }
.fill-line { line-height: 2.1; font-size: 1.02rem; }
.blank-input {
  border: 1px solid var(--border);
  border-bottom: 2px solid var(--accent);
  border-radius: 4px;
  padding: .1rem .35rem;
  margin: 0 .15rem;
  font-size: 1rem;
  font-family: inherit;
  background: #fffdf9;
  min-width: 3.5em;
  transition: border-color .12s ease, background .12s ease;
}
.blank-input:focus { outline: none; border-bottom-color: var(--accent-dark); background: #fff; }
.blank-input.drag-over {
  border-color: var(--accent) !important;
  background: #faeceb !important;
  box-shadow: 0 0 0 2px var(--accent);
}
.blank-input.correct { background: #eaf6ea; border-bottom-color: var(--green); color: var(--green); font-weight: 600; }
.blank-input.wrong { background: #fbeaea; border-bottom-color: var(--red); color: var(--red); text-decoration: line-through; }
.blank-hint { font-size: .82rem; color: var(--red); margin-left: .15rem; }

.choice-group {
  display: inline-flex;
  gap: .25rem;
  align-items: center;
  vertical-align: middle;
  margin: 0 .25rem;
  padding: .12rem .2rem;
  background: #f0e9df;
  border-radius: 8px;
}
.choice-btn {
  padding: .15rem .6rem;
  font-size: .95rem;
  font-family: inherit;
  font-weight: 500;
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--ink);
  border-radius: 6px;
  cursor: pointer;
  transition: all .12s ease;
  user-select: none;
  line-height: 1.35;
}
.choice-btn:hover:not(:disabled) {
  background: #fff6ee;
  border-color: var(--accent);
}
.choice-btn.selected {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent-dark);
  font-weight: 600;
}
.choice-btn.correct {
  background: var(--green) !important;
  color: #ffffff !important;
  border-color: #1b5e20 !important;
  font-weight: 600;
}
.choice-btn.wrong {
  background: var(--red) !important;
  color: #ffffff !important;
  border-color: #b71c1c !important;
  text-decoration: line-through;
}
.choice-btn.missed {
  border: 2px dashed var(--green) !important;
  background: #eaf6ea !important;
  color: var(--green) !important;
  font-weight: 700;
}
.choice-btn:disabled {
  cursor: default;
}

.markable-sentence {
  display: inline;
}
.mark-word {
  display: inline-block;
  padding: .05rem .25rem;
  margin: 0 .04rem;
  border-radius: 6px;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all .12s ease;
  user-select: none;
}
.mark-word:hover:not(.disabled) {
  background: #faeceb;
  border-color: var(--accent);
}
.mark-word.selected {
  border-color: var(--accent);
  background: #faeceb;
  color: var(--accent-dark);
  font-weight: 600;
}
.mark-word.correct {
  border-color: var(--green) !important;
  background: #eaf6ea !important;
  color: var(--green) !important;
  font-weight: 700;
}
.mark-word.wrong {
  border-color: var(--red) !important;
  background: #fbeaea !important;
  color: var(--red) !important;
  text-decoration: line-through;
}
.mark-word.missed {
  border: 1.5px dashed var(--green) !important;
  background: #eaf6ea !important;
  color: var(--green) !important;
  font-weight: 700;
}
.mark-word.disabled {
  cursor: default;
}

.passage-box {
  background: #fdfaf5;
  border: 1.5px solid var(--border);
  border-radius: 12px;
  padding: 1.1rem 1.3rem;
  line-height: 2.3;
  font-size: 1.05rem;
}
.passage-hint {
  font-size: .84rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .04em;
  margin-bottom: .8rem;
  border-bottom: 1px dashed var(--border);
  padding-bottom: .4rem;
}
.passage-text {
  font-size: 1.05rem;
}
.passage-word {
  display: inline-block;
  padding: 0 .2rem;
  margin: 0 .04rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all .12s ease;
  user-select: none;
  border-bottom: 2.5px solid transparent;
}
.passage-word:hover:not(.disabled) {
  background: #faeceb;
  border-bottom-color: var(--accent);
}
.passage-word.marked-noun {
  border-bottom: 2.5px solid var(--accent);
  background: #faeceb;
  color: var(--accent-dark);
  font-weight: 600;
}
.passage-word.marked-proper {
  border-bottom: 2.5px solid #2563eb;
  background: #eff6ff;
  color: #1e40af;
  font-weight: 700;
}
.passage-word.correct {
  border-bottom: 2.5px solid var(--green) !important;
  background: #eaf6ea !important;
  color: var(--green) !important;
  font-weight: 700;
}
.passage-word.correct-proper {
  border-bottom: 2.5px solid var(--green) !important;
  background: #eaf6ea !important;
  color: var(--green) !important;
  font-weight: 700;
}
.passage-word.missed {
  border-bottom: 2.5px dashed var(--green) !important;
  background: #eaf6ea !important;
  color: var(--green) !important;
  font-weight: 600;
}
.passage-word.missed-proper {
  border-bottom: 2.5px dashed var(--green) !important;
  background: #eaf6ea !important;
  color: var(--green) !important;
  font-weight: 600;
}
.passage-word.wrong {
  border-bottom: 2.5px solid var(--red) !important;
  background: #fbeaea !important;
  color: var(--red) !important;
  text-decoration: line-through;
}
.passage-word.disabled {
  cursor: default;
}

.matching-container {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}
.matching-group {
  background: #fbf9f5;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: .85rem .95rem;
}
.matching-group-title {
  font-weight: 700;
  color: var(--accent-dark);
  font-size: .95rem;
  margin-bottom: .6rem;
  border-bottom: 1px dashed var(--border);
  padding-bottom: .3rem;
}
.matching-board {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  gap: .8rem;
}
@media (max-width: 640px) {
  .matching-board {
    grid-template-columns: 1fr;
  }
}
.matching-col {
  display: flex;
  flex-direction: column;
  gap: .45rem;
}
.match-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .45rem;
  padding: .5rem .75rem;
  background: #ffffff;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all .15s ease;
  user-select: none;
  font-size: .93rem;
  min-height: 2.2rem;
}
.match-item:hover:not(.disabled) {
  border-color: var(--accent);
  background: #fffcf8;
}
.match-item.active-source {
  border-color: var(--accent);
  background: #faeceb;
  box-shadow: 0 0 0 3px rgba(181, 50, 44, 0.2);
}
.match-item.paired {
  border-color: #2563eb;
  background: #eff6ff;
}
.match-item.drag-over {
  border-color: var(--accent);
  background: #faeceb;
  transform: scale(1.02);
}
.match-item.correct {
  border-color: var(--green) !important;
  background: #eaf6ea !important;
}
.match-item.wrong {
  border-color: var(--red) !important;
  background: #fbeaea !important;
}
.match-item.missed {
  border: 1.5px dashed var(--green) !important;
  background: #eaf6ea !important;
}
.match-item.disabled {
  cursor: default;
}
.match-target-badge, .match-source-badge {
  display: none;
  font-size: .78rem;
  font-weight: 700;
  padding: .1rem .4rem;
  border-radius: 4px;
  background: #2563eb;
  color: white;
  white-space: nowrap;
}
.match-item.correct .match-target-badge,
.match-item.correct .match-source-badge {
  background: var(--green) !important;
  color: white !important;
  display: inline-block !important;
}
.match-item.wrong .match-target-badge,
.match-item.wrong .match-source-badge {
  background: var(--red) !important;
  color: white !important;
  display: inline-block !important;
}
.match-item.missed .match-target-badge,
.match-item.missed .match-source-badge {
  background: var(--green) !important;
  color: white !important;
  display: inline-block !important;
}
.check-result {
  margin-top: 1rem;
  padding-top: .8rem;
  border-top: 1px dashed var(--border);
  font-weight: 600;
  color: var(--muted);
}
.check-result.all-correct { color: var(--green); }

.session-controls {
  display: flex;
  gap: .6rem;
  flex-wrap: wrap;
  margin-top: 1.1rem;
}

.result-buttons {
  display: flex;
  gap: .6rem;
}
button.btn.correct { border-color: var(--green); color: var(--green); }
button.btn.correct:hover { background: var(--green); color: white; }
button.btn.wrong { border-color: var(--red); color: var(--red); }
button.btn.wrong:hover { background: var(--red); color: white; }

.summary-box {
  text-align: center;
  padding: 2rem 1rem;
}
.summary-box .big {
  font-size: 2.2rem;
  font-weight: 700;
  margin: .6rem 0;
}
.summary-box .big .correct { color: var(--green); }
.summary-box .big .wrong { color: var(--red); }

.breadcrumb {
  font-size: .85rem;
  color: var(--muted);
  margin-bottom: .6rem;
}
.breadcrumb a { color: var(--accent-dark); cursor: pointer; text-decoration: underline; }

.theory-toggle {
  margin: .6rem 0 1rem;
}
.theory-box {
  background: #fff9f0;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: .9rem 1rem;
  margin-bottom: 1rem;
  font-size: .93rem;
}