:root {
  color-scheme: light;
  --bg: #f7fbfa;
  --surface: #ffffff;
  --ink: #10201f;
  --muted: #52605e;
  --line: #dbe8e5;
  --primary: #13c9bd;
  --primary-dark: #067a72;
  --accent: #f5ba3f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: var(--primary-dark);
  font-weight: 700;
}

.site-header {
  background: #071413;
  color: #ffffff;
  border-bottom: 4px solid var(--primary);
}

.nav {
  width: min(1040px, calc(100% - 32px));
  margin: 0 auto;
  padding: 18px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #ffffff;
  text-decoration: none;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: grid;
  place-items: center;
  font-weight: 900;
  color: #041211;
}

.brand-name {
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0;
}

.nav-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.nav-links a {
  color: #dffdf9;
  text-decoration: none;
  font-size: 15px;
}

.hero {
  width: min(1040px, calc(100% - 32px));
  margin: 0 auto;
  padding: 54px 0 62px;
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(36px, 8vw, 68px);
  line-height: 0.98;
  letter-spacing: 0;
}

.hero p {
  max-width: 720px;
  margin: 20px 0 0;
  color: #d8ece9;
  font-size: 18px;
}

.container {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
  padding: 42px 0 64px;
}

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

.card,
.content {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 28px rgba(9, 37, 34, 0.06);
}

.card {
  padding: 22px;
  text-decoration: none;
  color: var(--ink);
}

.card h2 {
  margin: 0 0 8px;
  font-size: 20px;
}

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

.content {
  padding: clamp(22px, 4vw, 38px);
}

.content h1 {
  margin: 0 0 8px;
  font-size: clamp(32px, 7vw, 48px);
  line-height: 1.05;
  letter-spacing: 0;
}

.content h2 {
  margin: 34px 0 10px;
  font-size: 22px;
}

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

.content ul {
  padding-left: 22px;
}

.meta {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 14px;
}

.notice {
  border-left: 4px solid var(--accent);
  background: #fff8e7;
  padding: 14px 16px;
  border-radius: 8px;
  color: #4f3c05;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 24px 0;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 760px) {
  .grid {
    grid-template-columns: 1fr;
  }

  .nav {
    align-items: flex-start;
  }
}