/* ================================================================
   Santala Research — glossary.css  (Premium Edition)
   ================================================================ */

/* ── Hero ─────────────────────────────────────────────────────── */
.glossary-hero {
  padding: 140px 0 56px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.glossary-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.04em;
  margin-bottom: 16px;
}

.glossary-hero h1 span {
  background: linear-gradient(135deg, var(--accent), var(--accent2, #8b6cff));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.glossary-hero-sub {
  font-size: 1.02rem;
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ── Controls wrapper ─────────────────────────────────────────── */
.glossary-controls {
  position: sticky;
  top: 72px;
  z-index: 100;
  background: rgba(5, 5, 16, 0.88);
  backdrop-filter: blur(24px) saturate(1.3);
  -webkit-backdrop-filter: blur(24px) saturate(1.3);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
  margin-bottom: 44px;
}

/* ── Search ───────────────────────────────────────────────────── */
.glossary-search-wrap {
  max-width: 380px;
  margin: 0 auto 14px;
  position: relative;
}

.glossary-search-wrap svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  flex-shrink: 0;
}

#glossary-search {
  width: 100%;
  padding: 10px 16px 10px 40px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  transition: border-color 0.25s, box-shadow 0.25s;
  outline: none;
}

#glossary-search::placeholder {
  color: var(--text-muted);
}

#glossary-search:focus {
  border-color: var(--accent-dim);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ── A-Z Alphabet index ───────────────────────────────────────── */
.glossary-alpha {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 3px;
  margin-bottom: 12px;
}

.alpha-btn {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  padding: 3px 7px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
  line-height: 1.4;
  min-width: 26px;
  text-align: center;
}

.alpha-btn:hover:not(.alpha-btn--disabled) {
  border-color: rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.03);
}

.alpha-btn.active {
  border-color: var(--accent-dim);
  color: var(--accent);
  background: rgba(0, 232, 255, 0.06);
}

.alpha-btn--disabled {
  opacity: 0.2;
  cursor: default;
}

/* ── Category filters ─────────────────────────────────────────── */
.glossary-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
}

.glossary-filters .filter-btn {
  padding: 5px 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-body);
}

.glossary-filters .filter-btn:hover {
  border-color: rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.03);
}

.glossary-filters .filter-btn.active {
  border-color: rgba(0, 232, 255, 0.15);
  color: var(--accent);
  background: rgba(0, 232, 255, 0.06);
}

/* ── Grid ─────────────────────────────────────────────────────── */
.glossary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 18px;
  padding-bottom: 72px;
}

/* ── Card ─────────────────────────────────────────────────────── */
.glossary-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: var(--transition);
  scroll-margin-top: 120px;
  position: relative;
  overflow: hidden;
}

.glossary-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-dim), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.glossary-card:hover {
  border-color: rgba(255, 255, 255, 0.06);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.25);
  transform: translateY(-2px);
}

.glossary-card:hover::before {
  opacity: 1;
}

.glossary-card:target {
  border-color: var(--accent-dim);
  box-shadow: 0 0 0 2px rgba(0, 232, 255, 0.1), 0 8px 36px rgba(0, 232, 255, 0.08);
}

.glossary-card:target::before {
  opacity: 1;
}

/* ── Card Header ──────────────────────────────────────────────── */
.glossary-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.glossary-term {
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
  margin: 0;
  letter-spacing: -0.01em;
}

.glossary-cat-badge {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  border: 1px solid rgba(0, 232, 255, 0.1);
  color: var(--accent-dim);
  background: rgba(0, 232, 255, 0.03);
  white-space: nowrap;
}

/* ── Definition text ──────────────────────────────────────────── */
.glossary-def {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.78;
  margin: 0 0 14px;
}

/* ── Cross-links ──────────────────────────────────────────────── */
.glossary-link {
  color: var(--accent-dim);
  border-bottom: 1px dotted rgba(0, 232, 255, 0.3);
  text-decoration: none;
  transition: var(--transition);
}

.glossary-link:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ── Related terms ────────────────────────────────────────────── */
.glossary-related {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 5px;
  margin-top: 4px;
}

.related-label {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.related-chip {
  font-size: 0.72rem;
  padding: 2px 9px;
  border-radius: 10px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
  font-family: var(--font-mono);
}

.related-chip:hover {
  border-color: rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.03);
}

/* ── Empty / error states ─────────────────────────────────────── */
.glossary-empty,
.glossary-error {
  grid-column: 1 / -1;
  text-align: center;
  padding: 56px 24px;
  color: var(--text-muted);
  font-size: 0.93rem;
}

/* ── Section wrapper ──────────────────────────────────────────── */
.glossary-section {
  position: relative;
  z-index: 1;
}

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 768px) {
  .glossary-hero {
    padding: 120px 0 40px;
  }

  .glossary-controls {
    top: 60px;
  }

  .glossary-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .glossary-card {
    padding: 18px;
  }

  .glossary-alpha {
    gap: 2px;
  }

  .alpha-btn {
    font-size: 0.62rem;
    padding: 2px 5px;
    min-width: 22px;
  }
}

@media (max-width: 480px) {
  .glossary-hero h1 {
    font-size: 1.9rem;
  }

  .glossary-card-header {
    flex-direction: column;
    gap: 8px;
  }
}