:root {
  color-scheme: light;
  --ink: #091229;
  --muted: #5c687a;
  --line: #dde5ef;
  --blue: #0969f6;
  --green: #16b978;
  --bg: #f7fafc;
  --card: #ffffff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}

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

.topbar {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
  position: sticky;
  top: 0;
}

.nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  font-weight: 900;
  font-size: 22px;
  letter-spacing: 0;
}

.links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 14px;
}

.links a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 700;
}

.hero,
.content {
  max-width: 1080px;
  margin: 0 auto;
  padding: 56px 24px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 32px;
  align-items: center;
}

h1 {
  font-size: clamp(34px, 7vw, 68px);
  line-height: 1;
  letter-spacing: 0;
  margin: 0 0 20px;
}

h2 {
  font-size: 28px;
  line-height: 1.2;
  margin: 40px 0 12px;
}

h3 {
  font-size: 20px;
  margin: 28px 0 8px;
}

p {
  color: var(--muted);
  margin: 0 0 16px;
}

.lead {
  font-size: 19px;
  max-width: 720px;
}

.panel,
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.panel {
  padding: 24px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.card {
  padding: 20px;
}

.card strong {
  display: block;
  margin-bottom: 8px;
}

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 6px;
  background: var(--blue);
  color: white;
  text-decoration: none;
  font-weight: 900;
}

.notice {
  border-left: 4px solid var(--green);
  background: #eafaf3;
  padding: 16px;
  border-radius: 6px;
  color: #0f5f3f;
}

ul {
  color: var(--muted);
  padding-left: 22px;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 28px 24px;
  color: var(--muted);
  text-align: center;
  font-size: 14px;
}

@media (max-width: 760px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    grid-template-columns: 1fr;
    padding-top: 36px;
  }

  .grid {
    grid-template-columns: 1fr;
  }
}