:root {
  --vl-ink: #281f2f;
  --vl-muted: #61546a;
  --vl-purple: #6f3fd4;
  --vl-soft-purple: #f1e8ff;
  --vl-pink: #fff7fb;
  --vl-green: #e9fff0;
  --vl-red: #ffeaea;
  --vl-border: rgba(85, 63, 104, 0.14);
}

* { box-sizing: border-box; }

body.vocab-lab-page {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(255, 232, 240, 0.95), transparent 32%),
    linear-gradient(135deg, #fff7fb 0%, #f7f0ff 48%, #eef7ff 100%);
  color: var(--vl-ink);
}

button,
input { font: inherit; }

.vocab-lab-app {
  width: min(1120px, calc(100% - 28px));
  margin: 0 auto;
  padding: 18px 0 34px;
}

.vocab-topbar {
  min-height: 64px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.vocab-brand,
.vocab-back-link {
  color: inherit;
  text-decoration: none;
  font-weight: 900;
}

.vocab-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.vocab-logo {
  width: 38px;
  height: 38px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #7b45df, #ff7bc0);
  color: white;
}

.vocab-back-link {
  padding: 9px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--vl-border);
}

.vocab-panel,
.vocab-learn-card,
.vocab-exercise-card,
.vocab-score-card {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--vl-border);
  box-shadow: 0 18px 48px rgba(49, 31, 72, 0.09);
  border-radius: 28px;
}

.vocab-hero {
  padding: clamp(16px, 3vw, 24px);
  margin: 14px 0 18px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: center;
}

.vocab-hero-compact {
  border-radius: 22px;
}

.vocab-badge {
  display: inline-flex;
  width: fit-content;
  padding: 7px 12px;
  border-radius: 999px;
  background: var(--vl-soft-purple);
  color: #4c287c;
  font-weight: 900;
  font-size: 0.84rem;
}

.vocab-hero h1 {
  margin: 0 0 6px;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 1;
  letter-spacing: -0.045em;
}

.vocab-hero p,
.vocab-section-intro,
.vocab-instructions,
.vocab-help {
  color: var(--vl-muted);
  line-height: 1.55;
}

.vocab-hero p { max-width: 760px; margin: 0; }

.vocab-section { margin-top: 22px; }
.vocab-section h2 { margin: 0 0 8px; font-size: clamp(1.5rem, 3vw, 2.2rem); letter-spacing: -0.04em; }
.vocab-section-intro { margin: 0 0 14px; }

.vocab-learn-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.vocab-learn-card { padding: 16px; border-radius: 22px; }
.vocab-learn-card h3 { margin: 0 0 10px; }
.vocab-list { display: grid; gap: 7px; margin: 0; padding: 0; list-style: none; }
.vocab-list li { display: grid; gap: 4px; padding: 9px 10px; border-radius: 14px; background: var(--vl-pink); border: 1px solid rgba(85, 63, 104, 0.09); }
.vocab-list strong { color: #4c287c; }
.vocab-list span { color: var(--vl-muted); font-size: 0.92rem; line-height: 1.35; }

.vocab-exercise-card { padding: clamp(16px, 3vw, 24px); margin-top: 14px; border-radius: 24px; }
.vocab-exercise-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 14px; flex-wrap: wrap; margin-bottom: 12px; }
.vocab-exercise-head h3 { margin: 0; font-size: 1.25rem; }
.vocab-instructions { margin: 4px 0 0; }
.vocab-section-score { font-weight: 900; color: #4c287c; background: var(--vl-soft-purple); border-radius: 999px; padding: 7px 10px; min-width: 82px; text-align: center; }

.vocab-question-list { display: grid; gap: 12px; }
.vocab-question { border: 1px solid rgba(85, 63, 104, 0.12); background: #fff; border-radius: 18px; padding: 14px; }
.vocab-question.correct { background: var(--vl-green); border-color: rgba(30, 120, 62, 0.24); }
.vocab-question.wrong { background: var(--vl-red); border-color: rgba(175, 45, 45, 0.24); }
.vocab-question-title { display: flex; gap: 9px; align-items: flex-start; margin: 0 0 10px; font-weight: 900; line-height: 1.45; }
.vocab-q-number { flex: 0 0 auto; border-radius: 10px; background: var(--vl-soft-purple); color: #4c287c; padding: 4px 8px; font-size: 0.86rem; }

.vocab-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.vocab-option { display: flex; align-items: center; gap: 8px; padding: 10px; border-radius: 14px; border: 1px solid rgba(85, 63, 104, 0.14); background: #fffafd; cursor: pointer; font-weight: 800; }
.vocab-option:has(input:checked) { border-color: rgba(111, 63, 212, 0.7); background: var(--vl-soft-purple); }

.vocab-gap-line { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-weight: 800; line-height: 1.8; }
.vocab-gap-input { width: min(180px, 100%); min-height: 42px; border: 1px solid rgba(85, 63, 104, 0.22); border-radius: 14px; padding: 9px 11px; background: #fff; }
.vocab-base-word { color: #4c287c; background: var(--vl-soft-purple); border-radius: 10px; padding: 4px 8px; font-size: 0.85rem; }
.vocab-feedback { margin: 10px 0 0; color: var(--vl-muted); font-size: 0.92rem; line-height: 1.45; display: none; }
.vocab-question.checked .vocab-feedback { display: block; }

.vocab-match-layout { display: grid; grid-template-columns: minmax(180px, 0.45fr) minmax(0, 1fr); gap: 14px; align-items: start; }
.vocab-bank,
.vocab-targets { display: grid; gap: 10px; }
.vocab-bank { position: sticky; top: 12px; padding: 12px; border: 1px dashed rgba(111, 63, 212, 0.28); border-radius: 18px; background: #fffafd; }
.vocab-chip { min-height: 42px; border: 1px solid rgba(111, 63, 212, 0.28); border-radius: 14px; background: var(--vl-soft-purple); color: #4c287c; font-weight: 900; cursor: grab; padding: 9px 11px; text-align: center; }
.vocab-chip.selected { outline: 3px solid rgba(111, 63, 212, 0.25); background: #e5d6ff; }
.vocab-chip:active { cursor: grabbing; }
.vocab-target-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(140px, 0.45fr); gap: 10px; align-items: center; border: 1px solid rgba(85, 63, 104, 0.12); background: #fff; border-radius: 18px; padding: 10px; }
.vocab-definition { font-weight: 800; line-height: 1.45; }
.vocab-dropzone { min-height: 46px; border: 2px dashed rgba(85, 63, 104, 0.18); border-radius: 14px; display: grid; place-items: center; padding: 5px; background: #fffafd; }
.vocab-dropzone.drag-over { border-color: rgba(111, 63, 212, 0.75); background: var(--vl-soft-purple); }
.vocab-dropzone .vocab-chip { width: 100%; }
.vocab-target-row.correct { background: var(--vl-green); }
.vocab-target-row.wrong { background: var(--vl-red); }

.vocab-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.vocab-btn { min-height: 46px; border: 0; border-radius: 15px; padding: 11px 16px; font-weight: 900; cursor: pointer; }
.vocab-btn.primary { background: var(--vl-purple); color: #fff; box-shadow: 0 12px 24px rgba(111, 63, 212, 0.22); }
.vocab-btn.secondary { background: #fff; color: var(--vl-purple); border: 1px solid rgba(111, 63, 212, 0.25); }

.vocab-score-card { padding: 18px; border-radius: 22px; margin-top: 16px; display: none; }
.vocab-score-card.visible { display: block; }
.vocab-score-card h3 { margin: 0 0 8px; }
.vocab-score-card p { margin: 0; color: var(--vl-muted); line-height: 1.55; }

@media (max-width: 780px) {
  .vocab-hero,
  .vocab-learn-grid,
  .vocab-match-layout,
  .vocab-target-row { grid-template-columns: 1fr; }
  .vocab-hero { gap: 10px; }
  .vocab-options { grid-template-columns: 1fr; }
  .vocab-bank { position: static; }
}

.vocab-lab-page footer {
  padding: 22px 18px 34px;
  text-align: center;
  color: var(--vl-muted);
}

.vocab-lab-page footer a { color: inherit; font-weight: 900; }

.vocab-load-error {
  margin: 12px 0;
  padding: 12px 14px;
  border-radius: 16px;
  background: var(--vl-red);
  border: 1px solid rgba(160, 70, 70, 0.22);
  color: #7a1d1d;
  font-weight: 800;
}

.vocab-score-download {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(85, 63, 104, 0.12);
}

.vocab-name-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 900;
  color: var(--vl-ink);
}

.vocab-download-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.vocab-name-input {
  flex: 1 1 240px;
  min-height: 46px;
  border: 1px solid rgba(85, 63, 104, 0.22);
  border-radius: 15px;
  padding: 10px 12px;
  background: #fff;
  color: var(--vl-ink);
}

.vocab-download-help,
.vocab-download-message {
  margin-top: 8px !important;
  font-size: 0.92rem;
}

.vocab-download-message {
  color: #7a1d1d !important;
  font-weight: 800;
}

@media (max-width: 560px) {
  .vocab-download-row .vocab-btn,
  .vocab-name-input {
    width: 100%;
  }
}