:root {
  color-scheme: light;
  --bg: #f7f8fb;
  --card: #ffffff;
  --text: #151823;
  --muted: #5f6677;
  --line: #e6e8ef;
  --brand: #3656f5;
  --brand-dark: #2437b8;
}

* {
  box-sizing: border-box;
}

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

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

a:hover {
  text-decoration: underline;
}

.shell {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 56px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 800;
  letter-spacing: 0;
}

.mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 10px;
  background: var(--brand);
  color: white;
  font-weight: 900;
}

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

.hero {
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--card);
  box-shadow: 0 18px 40px rgba(18, 24, 40, 0.06);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--brand-dark);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 10px;
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1.1;
  letter-spacing: 0;
}

h2 {
  margin: 34px 0 10px;
  font-size: 22px;
  line-height: 1.25;
}

h3 {
  margin: 22px 0 8px;
  font-size: 17px;
}

p,
li {
  color: var(--muted);
}

.lead {
  margin: 0;
  max-width: 760px;
  font-size: 17px;
}

.card {
  margin-top: 18px;
  padding: 26px 30px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--card);
}

.meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.meta div {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfcff;
  color: var(--muted);
  font-size: 14px;
}

.meta strong {
  display: block;
  color: var(--text);
}

.notice {
  padding: 16px 18px;
  border-left: 4px solid var(--brand);
  border-radius: 10px;
  background: #eef2ff;
}

.footer {
  padding-top: 28px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 640px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero,
  .card {
    padding: 22px;
  }
}