:root {
  color-scheme: light;
  --surface-1:      #fcfcfb;
  --page:           #f9f9f7;
  --text-primary:   #0b0b0b;
  --text-secondary: #52514e;
  --muted:          #898781;
  --gridline:       #e1e0d9;
  --border:         rgba(11, 11, 11, 0.10);
  --accent:         #2a78d6;
  --accent-2:       #eb6834;
  --chip:           rgba(11, 11, 11, 0.05);
}
@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --surface-1:      #1a1a19;
    --page:           #0d0d0d;
    --text-primary:   #ffffff;
    --text-secondary: #c3c2b7;
    --muted:          #898781;
    --gridline:       #2c2c2a;
    --border:         rgba(255, 255, 255, 0.10);
    --accent:         #3987e5;
    --accent-2:       #d95926;
    --chip:           rgba(255, 255, 255, 0.06);
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --surface-1:      #1a1a19;
  --page:           #0d0d0d;
  --text-primary:   #ffffff;
  --text-secondary: #c3c2b7;
  --muted:          #898781;
  --gridline:       #2c2c2a;
  --border:         rgba(255, 255, 255, 0.10);
  --accent:         #3987e5;
  --accent-2:       #d95926;
  --chip:           rgba(255, 255, 255, 0.06);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--page);
  color: var(--text-primary);
  font: 15px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* Wide layout: content should use most of the viewport, not a narrow
   centered column. */
.wrap {
  width: 100%;
  max-width: 1600px;
  margin: 0 auto;
  padding: 28px clamp(16px, 3vw, 48px) 80px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

header.top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}
header.top .titles h1 {
  margin: 0 0 6px;
  font-size: 26px;
  font-weight: 650;
  letter-spacing: -0.01em;
}
header.top .crumbs {
  font-size: 13px;
  color: var(--muted);
  margin: 0 0 10px;
}
header.top .sub {
  color: var(--text-secondary);
  margin: 0 0 24px;
  max-width: 90ch;
}

button.ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 12px;
  font: inherit;
  font-size: 13px;
  cursor: pointer;
}
button.ghost:hover { background: var(--chip); }

/* -- tabs ---------------------------------------------------------------- */
.tabbar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  border-bottom: 1px solid var(--gridline);
  margin-bottom: 24px;
  padding-bottom: 10px;
}
.tabbar button {
  background: transparent;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 8px 14px;
  font: inherit;
  font-size: 13.5px;
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
}
.tabbar button:hover { background: var(--chip); color: var(--text-primary); }
.tabbar button.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.panels { width: 100%; }
.panel { display: none; }
.panel.active { display: block; }

/* Panel content spans the full wide column, in responsive multi-column
   groups rather than a single narrow paragraph strip. */
.panel h2 {
  font-size: 22px;
  margin: 0 0 6px;
}
.panel .intro {
  color: var(--text-secondary);
  max-width: 100ch;
  margin: 0 0 20px;
}

.callout {
  border-left: 3px solid var(--accent-2);
  background: var(--chip);
  padding: 10px 16px;
  border-radius: 0 8px 8px 0;
  margin: 0 0 20px;
  max-width: 100ch;
}
.callout.core { border-left-color: var(--accent); font-family: "Cambria Math", Cambria, serif; font-size: 16px; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-bottom: 8px;
}
.grid h3 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin: 0 0 10px;
}
.grid ul, .grid ol {
  margin: 0;
  padding-left: 20px;
}
.grid li { margin-bottom: 6px; }
.grid li strong { color: var(--text-primary); }

.status-note {
  margin-top: 28px;
  padding-top: 14px;
  border-top: 1px dashed var(--gridline);
  color: var(--muted);
  font-size: 13px;
}

/* -- home page section grid ---------------------------------------------- */
.section-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
}
.section-card {
  display: block;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
  background: var(--surface-1);
  color: inherit;
  text-decoration: none;
  transition: border-color 0.15s ease;
}
.section-card:hover {
  border-color: var(--accent);
  text-decoration: none;
}
.section-card h3 { margin: 0 0 6px; font-size: 16px; }
.section-card p { margin: 0 0 10px; color: var(--text-secondary); font-size: 13.5px; }
.section-card .count { color: var(--muted); font-size: 12px; }