body[data-theme="velvet-veil"] {
  --bg: #050205;
  --panel: #140919;
  --panel-2: #23162e;
  --card: rgba(35, 22, 46, 0.74);
  --card-strong: rgba(20, 9, 25, 0.9);
  --border: rgba(128, 92, 150, 0.24);
  --text: #f2eafb;
  --muted: #c6b7d8;
  --accent: #8e63c8;
  --accent-2: #b88bd8;
  --accent-soft: rgba(142, 99, 200, 0.18);
  --glow: rgba(142, 99, 200, 0.24);
}

body[data-theme="cathedral-blue"] {
  --bg: #02030a;
  --panel: #0b1223;
  --panel-2: #1a2742;
  --card: rgba(12, 32, 66, 0.74);
  --card-strong: rgba(11, 18, 35, 0.92);
  --border: rgba(148, 173, 206, 0.24);
  --text: #eaf3ff;
  --muted: #bbcee8;
  --accent: #4d7dc8;
  --accent-2: #94adce;
  --accent-soft: rgba(77, 125, 200, 0.16);
  --glow: rgba(77, 125, 200, 0.22);
}

body[data-theme="serpent-cerulean"] {
  --bg: #050913;
  --panel: #0f182d;
  --panel-2: #16254d;
  --card: rgba(22, 37, 77, 0.74);
  --card-strong: rgba(15, 24, 45, 0.92);
  --border: rgba(148, 173, 206, 0.22);
  --text: #edf4ff;
  --muted: #c3d2eb;
  --accent: #7ba0ea;
  --accent-2: #94adce;
  --accent-soft: rgba(123, 160, 234, 0.16);
  --glow: rgba(123, 160, 234, 0.22);
}

.tab-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.tab-button {
  cursor: pointer;
  border: 1px solid color-mix(in srgb, var(--accent-2) 28%, var(--border));
  border-radius: 999px;
  padding: 0.72rem 1rem;
  background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.015));
  color: var(--text);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04), 0 10px 18px rgba(0,0,0,0.12);
}

.tab-button.is-active {
  border-color: color-mix(in srgb, var(--accent) 60%, white 4%);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.05), 0 0 18px var(--glow), 0 12px 20px rgba(0,0,0,0.18);
}

.tab-panel {
  display: none;
}

.tab-panel.is-active {
  display: block;
}

.section-heading-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.section-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.34rem 0.72rem;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--accent-2) 24%, var(--border));
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  background: linear-gradient(180deg, rgba(255,255,255,0.035), rgba(255,255,255,0.015));
}

.collapsible {
  border: 1px solid color-mix(in srgb, var(--accent-2) 16%, var(--border));
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.012));
}

.collapsible summary {
  cursor: pointer;
  list-style: none;
  padding: 0.95rem 1rem;
  color: var(--text);
  font-weight: 600;
}

.collapsible summary::-webkit-details-marker {
  display: none;
}

.collapsible-body {
  padding: 0 1rem 1rem;
  display: grid;
  gap: 1rem;
}

.notes-stack,
.observatory-stack,
.feed-list {
  display: grid;
  gap: 1rem;
}

.research-grid,
.portal-grid,
.lab-grid,
.observatory-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.research-card,
.portal-card,
.dashboard-card,
.panel-card {
  display: grid;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
}

.research-card h2,
.portal-card h2,
.dashboard-card h2,
.panel-card h2 {
  margin-bottom: 0;
}

.research-card p,
.portal-card p,
.dashboard-card p,
.panel-card p {
  margin: 0;
}

.panel-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--accent-2);
  font-size: 0.92rem;
}

.split-fields {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.feed-item {
  padding: 0.9rem 1rem;
  border-radius: 18px;
  border: 1px solid color-mix(in srgb, var(--accent-2) 18%, var(--border));
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.012));
}

.feed-item strong,
.feed-item .feed-meta {
  display: block;
}

.feed-item .feed-meta {
  margin-top: 0.25rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.observatory-notes {
  min-height: 180px;
}

@media (max-width: 720px) {
  .split-fields {
    grid-template-columns: 1fr;
  }
}