/* ===== Button System ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.875rem;
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition), border-color var(--transition), color var(--transition), box-shadow var(--transition);
  white-space: nowrap;
  line-height: 1.5;
  font-family: inherit;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--link);
  color: #fff;
  border-color: var(--link);
}

.btn-primary:hover {
  background: var(--link-hover);
  border-color: var(--link-hover);
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border-color: var(--border);
}

.btn-ghost:hover {
  background: var(--bg-alt);
  color: var(--text);
  border-color: var(--border);
}

/* ===== Status Badges ===== */
.status-badge {
  display: inline-block;
  padding: 0.175rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  line-height: 1.4;
  white-space: nowrap;
}

.status-full {
  background: var(--status-full-bg);
  color: var(--status-full);
  border: 1px solid currentColor;
}

.status-partial {
  background: var(--status-partial-bg);
  color: var(--status-partial);
  border: 1px solid currentColor;
}

.status-none {
  background: var(--status-none-bg);
  color: var(--status-none);
  border: 1px solid currentColor;
}

.status-extension {
  background: var(--status-extension-bg);
  color: var(--status-extension);
  border: 1px solid currentColor;
}

.status-workaround {
  background: var(--status-workaround-bg);
  color: var(--status-workaround);
  border: 1px solid currentColor;
}

/* ===== Reserved Word Badges ===== */
.badge {
  display: inline-block;
  width: 18px;
  height: 18px;
  line-height: 18px;
  border-radius: var(--radius-sm);
  font-size: 0.625rem;
  font-weight: 700;
  text-align: center;
}

.badge-r {
  background: var(--reserved-bg);
  color: var(--reserved);
  border: 1px solid currentColor;
}

.badge-n {
  background: var(--non-reserved-bg);
  color: var(--non-reserved);
  border: 1px solid currentColor;
}

/* ===== Alias & Tag Badges ===== */
.alias-badge,
.tag-badge {
  display: inline-block;
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  line-height: 1.4;
}

.alias-badge {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-family: "JetBrains Mono", "Fira Code", "Cascadia Code", "Consolas", monospace;
}

.tag-badge {
  background: var(--status-extension-bg);
  border: 1px solid var(--status-extension);
  color: var(--status-extension);
}

/* ===== Category Cards ===== */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  margin: 1.75rem 0;
}

.category-card {
  display: block;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.375rem 1.5rem;
  text-decoration: none;
  color: var(--text);
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
}

.category-card:hover {
  border-color: var(--link);
  box-shadow: var(--shadow);
  text-decoration: none;
  color: var(--text);
  transform: translateY(-1px);
}

.category-card-title {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 0.375rem;
  color: var(--text);
}

.category-card:hover .category-card-title {
  color: var(--link);
}

.category-card-desc {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  line-height: 1.5;
}

.category-card-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ===== Feature Cards (for category pages) ===== */
.feature-list {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.feature-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
}

.feature-card:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--link);
  transform: translateX(2px);
}

.feature-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.375rem;
}

.feature-card-title {
  font-size: 0.9375rem;
  font-weight: 600;
}

.feature-card-title a {
  color: var(--text);
  text-decoration: none;
  transition: color var(--transition);
}

.feature-card-title a:hover {
  color: var(--link);
}

.feature-card-summary {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  line-height: 1.5;
}

.feature-card-aliases {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  margin-bottom: 0.5rem;
}

/* ===== Support Strip (compact row of status indicators) ===== */
.support-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.6rem;
}

.support-strip-item {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.725rem;
  color: var(--text-muted);
}

.support-strip-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  flex-shrink: 0;
}

.support-strip-dot.dot-full { background: var(--status-full); }
.support-strip-dot.dot-partial { background: var(--status-partial); }
.support-strip-dot.dot-none { background: var(--status-none); }
.support-strip-dot.dot-extension { background: var(--status-extension); }
.support-strip-dot.dot-workaround { background: var(--status-workaround); }

/* ===== Breadcrumb ===== */
.breadcrumb {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 0.625rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.1rem;
}

.breadcrumb a {
  color: var(--text-muted);
  transition: color var(--transition);
}

.breadcrumb a:hover {
  color: var(--link);
  text-decoration: none;
}

.breadcrumb-sep {
  margin: 0 0.2rem;
  color: var(--border);
}

/* ===== Legend ===== */
.legend-section {
  margin-top: 2.5rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.legend-title {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.875rem;
}

.legend-items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.75rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ===== Search Results ===== */
.search-results {
  margin-top: 1.25rem;
}

.search-empty {
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 3rem 0;
  text-align: center;
}

.search-result-group {
  margin-bottom: 2rem;
}

.search-result-group-title {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.625rem;
  padding-bottom: 0.375rem;
  border-bottom: 1px solid var(--border);
}

.search-result-item {
  padding: 0.625rem 0;
  border-bottom: 1px solid var(--border-subtle);
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-title {
  font-weight: 600;
  font-size: 0.9375rem;
}

.search-result-title a {
  color: var(--text);
  transition: color var(--transition);
}

.search-result-title a:hover {
  color: var(--link);
  text-decoration: none;
}

.search-result-desc {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 0.125rem;
}

/* ===== Compare Mode ===== */
.compare-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.625rem 0.75rem;
  padding: 1rem 1.25rem;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 1.5rem;
}

.compare-controls label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-muted);
}

.compare-controls select {
  padding: 0.375rem 0.625rem;
  font-size: 0.8125rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
  cursor: pointer;
}

.compare-controls select:focus {
  outline: 2px solid var(--link);
  outline-offset: 1px;
}

.compare-controls .compare-threshold {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8125rem;
}

.compare-controls .compare-threshold label {
  font-weight: 500;
  cursor: pointer;
}

.compare-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.compare-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.125rem;
}

.compare-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.875rem;
  padding-bottom: 0.625rem;
  border-bottom: 1px solid var(--border);
}

.compare-card-name {
  font-weight: 700;
  font-size: 0.9375rem;
}

.compare-card-row {
  font-size: 0.8125rem;
  margin-bottom: 0.3rem;
  color: var(--text-muted);
}

.compare-card-row strong {
  color: var(--text);
  font-weight: 600;
}

.compare-card pre {
  margin-top: 0.625rem;
  font-size: 0.775rem;
}

.compare-card-notes {
  margin-top: 0.625rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  list-style: disc;
  padding-left: 1.25rem;
}

.compare-card-notes li {
  margin-bottom: 0.25rem;
}

.compare-card-none {
  color: var(--text-muted);
  font-size: 0.8125rem;
  font-style: italic;
}

@media (max-width: 768px) {
  .compare-grid {
    grid-template-columns: 1fr;
  }

  .compare-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .compare-controls .compare-threshold {
    flex-wrap: wrap;
    gap: 0.5rem;
  }
}