:root {
  color-scheme: light;
  --ink: #15202b;
  --muted: #5d6875;
  --line: #d9e0e7;
  --paper: #f5f7f9;
  --panel: #ffffff;
  --blue: #174f86;
  --green: #246b4d;
  --gold: #8a641c;
}

* {
  box-sizing: border-box;
}

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

a {
  color: var(--blue);
  text-underline-offset: 3px;
}

.topbar {
  background: #101820;
  color: #fff;
  padding: 18px clamp(16px, 5vw, 56px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}

.brand {
  color: #fff;
  text-decoration: none;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0;
}

.nav {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-size: .95rem;
}

.nav a {
  color: #dfe9f3;
  text-decoration: none;
}

.hero {
  padding: 70px clamp(16px, 5vw, 56px) 42px;
  background: linear-gradient(180deg, #ffffff, #eef4f8);
  border-bottom: 1px solid var(--line);
}

.hero-inner,
.content {
  max-width: 980px;
  margin: 0 auto;
}

.kicker {
  color: var(--green);
  font-weight: 800;
  text-transform: uppercase;
  font-size: .82rem;
  letter-spacing: .06em;
  margin: 0 0 12px;
}

h1 {
  font-size: clamp(2.35rem, 6vw, 4.6rem);
  line-height: .98;
  margin: 0 0 22px;
  letter-spacing: 0;
}

h2 {
  font-size: clamp(1.55rem, 3vw, 2.25rem);
  line-height: 1.12;
  margin: 38px 0 14px;
  letter-spacing: 0;
}

.lead {
  color: var(--muted);
  font-size: 1.13rem;
  max-width: 760px;
}

.content {
  padding: 44px clamp(16px, 5vw, 30px) 64px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
  margin-top: 28px;
}

.wide {
  margin-top: 34px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
}

.card h2,
.card h3 {
  font-size: 1.15rem;
  line-height: 1.25;
  margin: 0 0 8px;
}

.card p {
  color: var(--muted);
  margin: 0 0 14px;
}

.article {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: clamp(22px, 4vw, 34px);
}

.article p {
  max-width: 780px;
}

.section-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.section-list a {
  display: block;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  font-weight: 700;
  text-decoration: none;
}

ul {
  padding-left: 20px;
}

li {
  margin-bottom: 10px;
}

.note {
  border-left: 4px solid var(--gold);
  background: #fff8e8;
  padding: 16px 18px;
  color: #463914;
  margin: 28px 0;
}

.next {
  margin-top: 30px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.next a {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  text-decoration: none;
  font-weight: 700;
}

footer {
  padding: 26px clamp(16px, 5vw, 56px);
  background: #101820;
  color: #dfe9f3;
  font-size: .95rem;
}

footer p {
  max-width: 980px;
  margin: 0 auto;
}

@media (max-width: 680px) {
  .topbar {
    align-items: flex-start;
  }

  .nav {
    width: 100%;
  }
}