:root {
  color-scheme: light dark;
  --bg: #eef8fb;
  --panel: rgba(255, 255, 255, 0.78);
  --text: #15202b;
  --muted: #667786;
  --blue: #78b7e5;
  --lavender: #b59cf0;
  --mint: #9be0c8;
  --border: rgba(80, 120, 150, 0.18);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101827;
    --panel: rgba(22, 32, 48, 0.82);
    --text: #eef5fb;
    --muted: #a9b5c3;
    --border: rgba(180, 210, 240, 0.16);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(120, 183, 229, 0.28), transparent 34rem),
    radial-gradient(circle at bottom right, rgba(155, 224, 200, 0.24), transparent 30rem),
    var(--bg);
  color: var(--text);
  line-height: 1.65;
}

.page {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0 64px;
}

header {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  margin-bottom: 28px;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  font-weight: 800;
  font-size: 1.15rem;
}

.mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--blue), var(--lavender));
  color: white;
}

nav {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

a {
  color: #2878bd;
  font-weight: 650;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.hero,
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 22px;
  box-shadow: 0 18px 48px rgba(40, 80, 110, 0.12);
}

.hero {
  padding: 34px;
  margin-bottom: 18px;
}

.hero p {
  max-width: 720px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.card {
  padding: 22px;
  margin: 16px 0;
}

h1,
h2,
h3 {
  line-height: 1.16;
  margin: 0 0 12px;
}

h1 {
  font-size: clamp(2.2rem, 7vw, 4.2rem);
  letter-spacing: 0;
}

h2 {
  font-size: 1.45rem;
  margin-top: 4px;
}

p,
ul {
  margin-top: 0;
}

li {
  margin: 8px 0;
}

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

.pill {
  display: inline-flex;
  padding: 7px 11px;
  border-radius: 999px;
  background: rgba(120, 183, 229, 0.16);
  color: #2878bd;
  font-weight: 750;
  font-size: 0.88rem;
}

.warning {
  border-color: rgba(224, 86, 96, 0.32);
}

footer {
  color: var(--muted);
  font-size: 0.92rem;
  margin-top: 28px;
}

@media (max-width: 680px) {
  header {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    padding: 24px;
  }
}