/* Sparse Supernova — light-first, navy / sky palette, Helvetica Neue stack */
:root {
  --bg: #e8eef5;
  --panel: #ffffff;
  --panel-2: #f4f8fc;
  --text: #0f172a;
  --muted: #475569;
  --border: rgba(15, 23, 42, 0.12);
  --accent: #0c4a6e;
  --accent-2: #0284c7;
  --sky: #7dd3fc;
  --shadow: rgba(15, 23, 42, 0.08);
  --danger: #be123c;
  --radius: 16px;
}

body[data-theme="dark"] {
  --bg: #0b1220;
  --panel: rgba(255, 255, 255, 0.06);
  --panel-2: rgba(255, 255, 255, 0.08);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.66);
  --border: rgba(255, 255, 255, 0.12);
  --accent: #7dd3fc;
  --accent-2: #38bdf8;
  --sky: #0ea5e9;
  --shadow: rgba(0, 0, 0, 0.35);
  --danger: #fb7185;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 20% -10%, rgba(125, 211, 252, 0.35), transparent 55%),
    radial-gradient(900px 500px at 90% 10%, rgba(12, 74, 110, 0.12), transparent 52%),
    var(--bg);
  color: var(--text);
}

a {
  color: var(--accent-2);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.95em;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(232, 238, 245, 0.92));
  backdrop-filter: blur(10px);
}

body[data-theme="dark"] .topbar {
  background: rgba(0, 0, 0, 0.25);
}

.brand__title {
  font-weight: 760;
  letter-spacing: 0.2px;
  color: var(--accent);
}

.brand__subtitle {
  font-size: 0.92rem;
  color: var(--muted);
  margin-top: 4px;
}

.btn {
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  border-radius: 999px;
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 650;
}

.btn.btn-ghost {
  background: transparent;
}

.shell {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 18px;
  padding: 18px 20px 0 20px;
}

.sidebar {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 10px 28px var(--shadow);
  padding: 16px;
  height: fit-content;
  position: sticky;
  top: 16px;
}

.sidebar__section {
  color: var(--muted);
  font-weight: 720;
  font-size: 0.85rem;
  margin: 14px 0 8px 0;
}

.sidebar__section--cta {
  margin-top: 18px;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.nav button {
  text-align: left;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 650;
}

.nav button[aria-current="page"] {
  outline: 2px solid rgba(2, 132, 199, 0.45);
  border-color: rgba(12, 74, 110, 0.35);
}

.cta-box {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cta {
  border: 1px solid var(--border);
  background: var(--panel-2);
  border-radius: 14px;
  padding: 12px;
}
.cta__title {
  font-weight: 800;
  margin-bottom: 8px;
}
.cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--muted);
}
.cta__links a {
  color: var(--text);
  border: 1px solid var(--border);
  padding: 8px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.65);
}

body[data-theme="dark"] .cta__links a {
  background: rgba(255, 255, 255, 0.03);
}

.main {
  padding-bottom: 20px;
}

.page {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 10px 28px var(--shadow);
  padding: 18px;
}

.page h1 {
  margin: 0 0 6px 0;
  font-size: 1.55rem;
}

.page p {
  margin: 10px 0;
  color: var(--muted);
  line-height: 1.55;
}

.grid-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 14px;
}

.card {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--panel-2);
  padding: 12px;
}

.card__title {
  font-weight: 820;
  margin-bottom: 6px;
}
.card__meta {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.45;
}

.protected-note {
  margin-top: 12px;
  border: 1px dashed rgba(12, 74, 110, 0.28);
  border-radius: 12px;
  padding: 12px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.55);
}

body[data-theme="dark"] .protected-note {
  border-color: rgba(255, 255, 255, 0.22);
  background: rgba(0, 0, 0, 0.04);
}

.footer {
  padding: 18px 20px 30px 20px;
  color: var(--muted);
}

.footer__muted {
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

.list {
  margin: 10px 0 0 0;
  padding-left: 18px;
  color: var(--muted);
}

.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

.code-block {
  margin-top: 10px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel-2);
  color: var(--text);
  font-size: 0.83rem;
  overflow-x: auto;
}

.first-run__list {
  margin: 10px 0 0 0;
  padding-left: 22px;
  color: var(--muted);
  line-height: 1.55;
}

.first-run__list li {
  margin: 6px 0;
}

@media (max-width: 980px) {
  .shell {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: static;
  }
  .grid-cards {
    grid-template-columns: 1fr;
  }
}