:root {
  color-scheme: light;
  --bg: #f3f6fb;
  --surface: #ffffff;
  --surface-alt: #edf3ff;
  --text: #1e293b;
  --muted: #475569;
  --border: #cbd5e1;
  --accent: #1d4ed8;
  --accent-strong: #1e40af;
  --code: #e0e7ff;
  --shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.7 Inter, "Segoe UI", Arial, sans-serif;
}

a {
  color: var(--accent);
}

.site-header,
.site-footer {
  background: #0f172a;
  color: #e2e8f0;
}

.site-header__inner,
.site-footer__inner,
.page {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
}

.site-header h1 {
  margin: 0;
  font-size: 1.2rem;
}

.site-header p,
.site-footer p {
  margin: 0;
  color: #cbd5e1;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.site-nav a {
  color: #bfdbfe;
  text-decoration: none;
  font-weight: 600;
}

.site-nav a:hover {
  text-decoration: underline;
}

.page {
  padding: 28px 0 48px;
}

.page__panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.hero {
  display: grid;
  gap: 24px;
  align-items: start;
}

.hero img,
.content img {
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: #fff;
}

.kicker {
  margin: 0 0 8px;
  color: var(--accent-strong);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.25;
}

h1 {
  margin: 0 0 14px;
  font-size: 2.2rem;
}

h2 {
  margin: 36px 0 14px;
  font-size: 1.45rem;
}

h3 {
  margin: 24px 0 10px;
  font-size: 1.15rem;
}

p,
ul,
ol,
table {
  margin: 0 0 16px;
}

.breadcrumb {
  margin-bottom: 16px;
  color: var(--muted);
  font-size: 0.95rem;
}

.summary-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.summary-card {
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface-alt);
}

.summary-card h3 {
  margin-top: 0;
}

.meta-table,
.skill-table {
  width: 100%;
  border-collapse: collapse;
}

.meta-table th,
.meta-table td,
.skill-table th,
.skill-table td {
  padding: 12px 14px;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.meta-table th,
.skill-table th {
  background: #eff6ff;
}

code {
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--code);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.93em;
}

.note {
  padding: 16px 18px;
  border-left: 4px solid var(--accent);
  background: #eff6ff;
  border-radius: 12px;
}

.link-list {
  display: grid;
  gap: 10px;
  padding: 0;
  list-style: none;
}

.link-list a {
  font-weight: 600;
}

.spec-meta {
  display: grid;
  gap: 12px;
  margin: 0 0 24px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface-alt);
}

.spec-meta__grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.spec-meta__item dt {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.spec-meta__item dd {
  margin: 0;
}

.spec-status {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 700;
}

.spec-status--implemented {
  background: #dcfce7;
  color: #166534;
}

.spec-status--in-progress {
  background: #fef3c7;
  color: #92400e;
}

.spec-status--planned,
.spec-status--draft {
  background: #e0e7ff;
  color: #3730a3;
}

.spec-status--review-needed,
.spec-status--deprecated,
.spec-status--unknown {
  background: #fee2e2;
  color: #991b1b;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 16px;
}

.spec-table th,
.spec-table td {
  padding: 12px 14px;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.spec-table th {
  background: #eff6ff;
}

.table-wrap {
  overflow-x: auto;
  margin: 0 0 16px;
}

.loader-frame {
  display: grid;
  gap: 20px;
}

.loader-heading {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  margin-bottom: 8px;
}

.loader-heading small {
  color: var(--muted);
}

.loading,
.error-panel {
  padding: 18px;
  border-radius: 16px;
}

.loading {
  background: var(--surface-alt);
  color: var(--muted);
}

.error-panel {
  border: 1px solid #fecaca;
  background: #fff1f2;
  color: #9f1239;
}

.site-footer__inner {
  padding: 18px 0 24px;
}

@media (max-width: 720px) {
  .page__panel {
    padding: 22px;
  }

  h1 {
    font-size: 1.8rem;
  }
}