:root {
  color-scheme: light;
  --bg: #f7f8fb;
  --surface: #ffffff;
  --surface-soft: #eef3ff;
  --text: #182033;
  --muted: #5e6a7d;
  --brand: #2563eb;
  --brand-dark: #1e40af;
  --border: #d8deea;
  --code: #0f172a;
  --shadow: 0 18px 50px rgba(24, 32, 51, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.65;
}

a {
  color: var(--brand);
  text-decoration: none;
}

a:hover {
  color: var(--brand-dark);
  text-decoration: underline;
}

.site-header {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 55%, #2563eb 100%);
  color: #ffffff;
  padding: 4rem 1.5rem;
}

.site-header a {
  color: #ffffff;
}

.wrap {
  max-width: 1040px;
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: #c7d2fe;
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.18;
}

h1 {
  max-width: 860px;
  margin: 0;
  font-size: clamp(2.25rem, 5vw, 4.6rem);
  letter-spacing: -0.05em;
}

h2 {
  margin-top: 2.75rem;
  font-size: clamp(1.65rem, 3vw, 2.25rem);
  letter-spacing: -0.03em;
}

h3 {
  margin-top: 2rem;
  font-size: 1.3rem;
}

.lead {
  max-width: 820px;
  margin: 1.25rem 0 0;
  color: #dbeafe;
  font-size: 1.22rem;
}

.nav {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 999px;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  font-weight: 700;
}

.main {
  padding: 2rem 1.5rem 4rem;
}

.card {
  margin: -3.25rem auto 2rem;
  padding: 2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.post-card {
  display: grid;
  gap: 1rem;
}

.meta {
  color: var(--muted);
  font-size: 0.95rem;
}

.article {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: clamp(1.25rem, 4vw, 3rem);
}

.article h1 {
  color: var(--text);
  font-size: clamp(2rem, 4vw, 3.4rem);
}

.article .lead {
  color: var(--muted);
}

.callout {
  margin: 2rem 0;
  padding: 1.25rem;
  border-left: 5px solid var(--brand);
  background: var(--surface-soft);
  border-radius: 14px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  overflow: hidden;
  border-radius: 14px;
}

th,
td {
  border: 1px solid var(--border);
  padding: 0.8rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: #eef2ff;
}

code {
  color: var(--code);
  background: #eef2ff;
  border-radius: 6px;
  padding: 0.15rem 0.35rem;
}

.site-footer {
  padding: 2rem 1.5rem;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 720px) {
  .card {
    margin-top: -2rem;
    padding: 1.25rem;
  }

  th,
  td {
    display: block;
    width: 100%;
  }
}