.brand--link {
  color: inherit;
  text-decoration: none;
}

.vocab-shell {
  max-width: 1360px;
  padding-top: clamp(0.9rem, 2vw, 1.5rem);
}

.vocab-heading {
  margin-bottom: 1.4rem;
}

.vocab-heading h1 {
  margin: 0;
  color: var(--ink);
  font: 600 clamp(1.6rem, 3vw, 2.1rem) "Space Grotesk", "Trebuchet MS", sans-serif;
}

.vocab-workspace {
  display: grid;
  grid-template-columns: minmax(265px, 360px) minmax(0, 1fr);
  gap: 1rem;
  min-height: 68vh;
}

.vocab-menu-panel,
.vocab-reader {
  border: 1px solid var(--border);
  border-radius: 0.7rem;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 16px 32px rgba(21, 42, 102, 0.08);
}

.vocab-menu-panel {
  overflow: hidden;
}

.vocab-menu-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--brand);
  color: #fff;
  font: 600 0.95rem "Space Grotesk", "Trebuchet MS", sans-serif;
}

.vocab-menu-panel__header strong {
  min-width: 2.25rem;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  text-align: center;
}

.category-list {
  display: grid;
  max-height: calc(72vh - 3rem);
  overflow: auto;
}

.category-card {
  position: relative;
  display: grid;
  gap: 0.75rem;
  padding: 0.95rem 1rem;
  border-bottom: 1px solid #dbe3f0;
}

.category-card.is-active {
  background: var(--brand-soft);
}

.category-card__top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: 0.65rem;
}

.category-card__title {
  margin: 0;
  color: var(--ink);
  font: 600 0.98rem "Space Grotesk", "Trebuchet MS", sans-serif;
  line-height: 1.3;
}

.category-info {
  display: inline-grid;
  place-items: center;
  width: 1.75rem;
  height: 1.75rem;
  min-width: 1.75rem;
  padding: 0;
  border-color: #b8c7df;
  border-radius: 50%;
  color: var(--brand);
  font: 700 0.95rem "Space Grotesk", "Trebuchet MS", sans-serif;
}

.category-popover {
  position: fixed;
  z-index: 20;
  min-width: 170px;
  padding: 0.7rem 0.8rem;
  border: 1px solid #dbe3f0;
  border-radius: 0.5rem;
  background: #fff;
  box-shadow: 0 12px 24px rgba(21, 42, 102, 0.15);
  color: var(--ink);
  font: 600 0.86rem "Space Grotesk", "Trebuchet MS", sans-serif;
}

.category-popover p {
  margin: 0;
}

.category-popover p + p {
  margin-top: 0.35rem;
}

.category-card__actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.category-action {
  min-height: 42px;
  padding: 0.55rem 0.7rem;
  border-radius: 0.5rem;
  background: #fff;
  color: var(--ink);
  font-weight: 600;
}

.category-action.is-active {
  border-color: var(--accent-dark);
  background: var(--accent);
  color: #fff;
}

.vocab-reader {
  padding: clamp(1.1rem, 3vw, 2rem);
  overflow: auto;
  max-height: 76vh;
}

.vocab-reader__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.85rem;
  font-family: "Space Grotesk", "Trebuchet MS", sans-serif;
}

.vocab-reader__meta span {
  padding: 0.25rem 0.55rem;
  border: 1px solid #d4a05d;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 0.82rem;
  font-weight: 600;
}

.vocab-reader__heading {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.vocab-reader h2 {
  margin: 0;
  color: var(--brand);
  font: 600 clamp(1.35rem, 2.4vw, 1.9rem) "Space Grotesk", "Trebuchet MS", sans-serif;
}

.vocab-reader__heading p {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font: 400 0.94rem "Space Grotesk", "Trebuchet MS", sans-serif;
}

.wrong-filter {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 38px;
  padding: 0.45rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background: #fff;
  color: var(--muted);
  font: 600 0.88rem "Space Grotesk", "Trebuchet MS", sans-serif;
  white-space: nowrap;
}

.wrong-filter input {
  width: 1rem;
  height: 1rem;
  accent-color: var(--brand);
}

.vocab-content {
  font-family: "Space Grotesk", "Trebuchet MS", sans-serif;
}

.learn-list {
  display: grid;
  gap: 0.7rem;
}

.learn-card {
  padding: 0.85rem 0.95rem;
  border: 1px solid #dbe3f0;
  border-radius: 0.55rem;
  background: #f1f5f9;
}

.learn-card--correct {
  border-color: rgba(21, 128, 61, 0.4);
  background: #ecfdf3;
}

.learn-card--wrong {
  border-color: rgba(180, 35, 45, 0.4);
  background: #fff1f2;
}

.learn-card--unseen {
  border-color: #cbd5e1;
  background: #f1f5f9;
}

.learn-card__term {
  margin: 0;
  color: var(--ink);
  font-size: 1.03rem;
  font-weight: 600;
}

.learn-card__term--pair {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  font-size: 1.08rem;
}

.learn-card__term--pair span {
  display: inline-grid;
  place-items: center;
  min-width: 2.1rem;
  min-height: 1.35rem;
  padding: 0.05rem 0.45rem;
  border-radius: 999px;
  background: #dbeafe;
  color: var(--brand);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
}

.learn-card__explanation,
.learn-card__sentence {
  margin: 0.28rem 0 0;
  color: #26364f;
  font-size: 0.94rem;
  line-height: 1.55;
}

.learn-card__sentence {
  font-style: italic;
}

.learn-card__examples {
  display: grid;
  gap: 0.28rem;
  margin-top: 0.35rem;
}

.learn-card__sentence--pair {
  margin: 0;
}

.learn-card__sentence--pair strong {
  color: var(--brand);
  font-style: normal;
}

.empty-state {
  margin: 0;
  padding: 1rem;
  border: 1px solid #dbe3f0;
  border-radius: 0.55rem;
  background: #fff;
  color: var(--muted);
  font-weight: 600;
}

.quiz-form {
  display: grid;
  gap: 1rem;
}

.quiz-intro,
.quiz-loading {
  display: grid;
  justify-items: start;
  gap: 0.9rem;
  padding: 1rem;
  border: 1px solid #dbe3f0;
  border-radius: 0.55rem;
  background: #fff;
  color: #26364f;
  line-height: 1.55;
}

.quiz-intro p,
.quiz-loading p {
  margin: 0;
}

.quiz-loading {
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
}

.quiz-loading__spinner {
  width: 1.2rem;
  height: 1.2rem;
  border: 3px solid #dbe3f0;
  border-top-color: var(--brand);
  border-radius: 50%;
  animation: vocab-spin 0.8s linear infinite;
}

@keyframes vocab-spin {
  to {
    transform: rotate(360deg);
  }
}

.quiz-question {
  padding: 1rem;
  border: 1px solid #dbe3f0;
  border-radius: 0.55rem;
  background: #fff;
}

.quiz-question__prompt {
  margin: 0 0 0.75rem;
  color: #26364f;
  font-size: 0.96rem;
  line-height: 1.55;
}

.quiz-question__prompt strong {
  color: var(--brand);
}

.quiz-options {
  display: grid;
  gap: 0.5rem;
}

.quiz-option {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 42px;
  padding: 0.55rem 0.65rem;
  border: 1px solid #dbe3f0;
  border-radius: 0.5rem;
  background: #fbfcff;
  color: var(--ink);
}

.quiz-option__label {
  min-width: 2rem;
  color: var(--brand);
  font-weight: 700;
}

.quiz-option input {
  width: 1rem;
  height: 1rem;
  accent-color: var(--brand);
}

.quiz-option.is-correct {
  border-color: rgba(21, 128, 61, 0.55);
  background: #ecfdf3;
}

.quiz-option.is-wrong {
  border-color: rgba(180, 35, 45, 0.55);
  background: #fff1f2;
}

.quiz-feedback {
  display: grid;
  gap: 0.35rem;
  margin-top: 0.85rem;
  padding: 0.75rem 0.85rem;
  border-radius: 0.5rem;
  color: #26364f;
  font-size: 0.92rem;
  line-height: 1.5;
}

.quiz-feedback.is-correct {
  background: #ecfdf3;
}

.quiz-feedback.is-wrong {
  background: #fff1f2;
}

.quiz-feedback p {
  margin: 0;
}

.quiz-feedback__options {
  display: grid;
  gap: 0.2rem;
  margin: 0.2rem 0 0;
  padding-left: 1.2rem;
}

.quiz-feedback__chosen:empty {
  display: none;
}

.quiz-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.quiz-button {
  border-radius: 0.5rem;
  border-color: var(--accent-dark);
  background: var(--accent);
  color: #fff;
  font-weight: 600;
}

.quiz-button:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.quiz-status {
  margin: 0;
  color: var(--accent-dark);
  font-size: 0.92rem;
  font-weight: 600;
}

.quiz-status.is-error {
  color: #b4232d;
}

@media (max-width: 820px) {
  .vocab-workspace {
    grid-template-columns: 1fr;
  }

  .category-list {
    max-height: 360px;
  }

  .vocab-reader {
    max-height: none;
  }
}

@media (max-width: 560px) {
  .vocab-reader__heading {
    display: grid;
  }

  .category-card__actions {
    grid-template-columns: 1fr;
  }
}