/* Shared word-card, badge, and check-button styles */

.word-card {
  position: relative;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 0.5rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  padding: 0.75rem;
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s, opacity 0.25s;
}

.word-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 0;
  background: var(--muted);
  border-radius: 3px 0 0 3px;
  transition: height 0.08s ease-out;
}

.word-card.learned {
  opacity: 0.45;
}

.word-card.learned::after {
  height: 100%;
}

.card-top {
  display: flex;
  gap: 0.35rem;
  align-items: center;
}

.card-top .check-btn {
  margin-left: auto;
}

.card-top .ghost-btn {
  margin-left: auto;
}

.card-top .ghost-btn ~ .check-btn {
  margin-left: 0;
}

.check-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: 2px solid var(--line);
  border-radius: 50%;
  background: none;
  color: var(--line);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background 0.15s, box-shadow 0.15s;
}

.check-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.check-btn:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--panel), 0 0 0 4px var(--accent);
}

.check-btn.checked {
  border-color: var(--accent);
  background: var(--accent);
  color: white;
}

.card-body {
  display: grid;
  align-content: start;
  gap: 0.4rem;
}

.card-sentence {
  margin: 0;
  font-size: 0.85rem;
  color: var(--sentence);
  line-height: 1.4;
}

.sentence-word:not(.sentence-word-hidden) {
  color: var(--accent, #475569);
  font-weight: 600;
}

.sentence-word.sentence-word-hidden {
  color: transparent !important;
  border-bottom: 2px solid var(--accent, #475569);
  font-weight: 700;
  transition: color 0.15s ease;
}

.card-sentence:hover .sentence-word.sentence-word-hidden,
*:hover > .sentence-word.sentence-word-hidden {
  color: var(--accent, #475569) !important;
}

.set-badge,
.note-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.45rem;
  font-size: 0.6875rem;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  background: var(--surface);
  color: var(--muted);
}