/* ==========================================================================
   GLOSSARIO 3D — CSS
   ========================================================================== */

/* --- Hero --- */
.gloss-hero {
  position: relative;
  padding: 8rem 0 3rem;
  background: var(--bg-primary);
  overflow: hidden;
}
.gloss-hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -15%;
  width: 50%;
  height: 180%;
  background: linear-gradient(135deg, #0071E3, #00a3ff);
  opacity: 0.05;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}
.gloss-hero__title {
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  font-weight: 800;
  margin-bottom: 0.75rem;
  position: relative;
}
.gloss-hero__desc {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  line-height: 1.6;
  position: relative;
}

/* --- Busca --- */
.gloss-search {
  position: sticky;
  top: 60px;
  z-index: 50;
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}
.gloss-search__inner {
  display: flex;
  gap: 1rem;
  align-items: center;
}
.gloss-search__input {
  flex: 1;
  padding: 0.85rem 1.25rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}
.gloss-search__input::placeholder {
  color: var(--text-muted);
}
.gloss-search__input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.12);
}
.gloss-search__count {
  font-size: 0.85rem;
  color: var(--text-muted);
  white-space: nowrap;
}

/* --- Navegacao Alfabetica --- */
.gloss-alpha {
  position: sticky;
  top: 120px;
  z-index: 49;
  background: rgba(10, 10, 10, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}
.gloss-alpha__list {
  display: flex;
  gap: 0.25rem;
  justify-content: center;
  flex-wrap: wrap;
  list-style: none;
  padding: 0;
  margin: 0;
}
.gloss-alpha__btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: none;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  font-family: inherit;
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.gloss-alpha__btn:hover,
.gloss-alpha__btn.active {
  background: rgba(0, 113, 227, 0.12);
  color: var(--accent-primary);
}
.gloss-alpha__btn.disabled {
  opacity: 0.25;
  cursor: default;
  pointer-events: none;
}

/* --- Termos --- */
.gloss-terms {
  padding: var(--section-padding) 0;
  min-height: 60vh;
}
.gloss-letter-group {
  margin-bottom: 3rem;
}
.gloss-letter-group__heading {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent-primary);
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border);
  margin-bottom: 1.5rem;
}
.gloss-terms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1rem;
}
.gloss-term {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  transition: transform var(--transition-base), border-color var(--transition-base);
}
.gloss-term:hover {
  transform: translateY(-2px);
  border-color: rgba(0, 113, 227, 0.25);
}
.gloss-term[hidden] {
  display: none;
}
.gloss-term__name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}
.gloss-term__def {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}
.gloss-term__def a {
  color: var(--accent-primary);
  text-decoration: none;
}
.gloss-term__def a:hover {
  text-decoration: underline;
}

/* --- Empty State --- */
.gloss-empty {
  text-align: center;
  padding: 4rem 0;
  display: none;
}
.gloss-empty.visible {
  display: block;
}
.gloss-empty__icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.4;
}
.gloss-empty__text {
  color: var(--text-muted);
  font-size: 1.1rem;
}

/* --- Letter group hidden when search filters --- */
.gloss-letter-group.hidden {
  display: none;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .gloss-search__inner {
    flex-direction: column;
  }
  .gloss-alpha__btn {
    width: 30px;
    height: 30px;
    font-size: 0.75rem;
  }
  .gloss-terms-grid {
    grid-template-columns: 1fr;
  }
}