:root {
  color-scheme: light dark;
  --ink: #122033;
  --muted: #52606d;
  --blue: #0d4fc4;
  --teal: #006e61;
  --surface: rgba(255, 255, 255, 0.86);
  --line: rgba(18, 32, 51, 0.12);
  --page: #f3f5f9;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 85% 0%, rgba(13, 79, 196, 0.12), transparent 34rem),
    var(--page);
  line-height: 1.65;
}

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

.shell {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 750;
  text-decoration: none;
}

.mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  color: white;
  background: linear-gradient(145deg, var(--blue), var(--teal));
  border-radius: 12px;
}

nav { display: flex; flex-wrap: wrap; gap: 14px; }
nav a { color: var(--muted); text-decoration: none; font-size: 0.94rem; }

main { padding: 34px 0 72px; }

.hero { padding: 52px 0 28px; }
.eyebrow { color: var(--teal); font-weight: 700; }
h1 { max-width: 760px; margin: 8px 0 18px; font-size: clamp(2.25rem, 7vw, 4.6rem); line-height: 1.05; letter-spacing: -0.045em; }
h2 { margin-top: 2.2rem; line-height: 1.2; }
h3 { margin-top: 1.65rem; line-height: 1.25; }
.lede { max-width: 700px; color: var(--muted); font-size: 1.18rem; }

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 30px 0;
}

.card, article {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: 0 18px 48px rgba(18, 32, 51, 0.06);
}

.card { padding: 22px; }
.card strong { display: block; margin-bottom: 6px; }
.card p { margin: 0; color: var(--muted); }

article { padding: clamp(22px, 5vw, 52px); }
article h1 { font-size: clamp(2rem, 5vw, 3.6rem); }
article li { margin: 0.55rem 0; }
.lang { padding-top: 1rem; border-top: 1px solid var(--line); margin-top: 3rem; }
.date, .note { color: var(--muted); }

.cta {
  display: inline-block;
  margin-top: 12px;
  padding: 12px 18px;
  color: white;
  background: var(--blue);
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
}

footer { padding: 22px 0 44px; color: var(--muted); font-size: 0.9rem; }

@media (max-width: 720px) {
  header { align-items: flex-start; flex-direction: column; }
  .grid { grid-template-columns: 1fr; }
  .hero { padding-top: 22px; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f4f7fb;
    --muted: #b8c0ca;
    --blue: #75a6ff;
    --teal: #52d9c2;
    --surface: rgba(31, 34, 39, 0.9);
    --line: rgba(255, 255, 255, 0.12);
    --page: #090b0f;
  }
}