:root {
  color-scheme: light;
  --brand: #1f3b57;
  --brand-deep: #16283b;
  --accent: #c58b38;
  --canvas: #f6f0e5;
  --surface: #fffdf8;
  --surface-muted: #f0e4d1;
  --text: #223244;
  --text-muted: #687585;
  --border: #ddd0bc;
  --success: #68856a;
  --danger: #b7675d;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  padding: 0;
}

body {
  background: linear-gradient(180deg, #fbf5ea 0%, var(--canvas) 100%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

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

.shell {
  margin: 0 auto;
  max-width: 920px;
  padding: 32px 20px 56px;
}

.topbar {
  align-items: center;
  display: flex;
  gap: 14px;
  margin-bottom: 24px;
}

.logo {
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 8px 28px rgba(22, 40, 59, 0.08);
  display: inline-flex;
  height: 54px;
  justify-content: center;
  width: 54px;
}

.logo img {
  height: 34px;
  width: 34px;
}

.brand-block {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-name {
  color: var(--brand-deep);
  font-size: 26px;
  font-weight: 900;
  letter-spacing: -0.03em;
}

.brand-tag {
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
}

.hero,
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: 0 12px 34px rgba(22, 40, 59, 0.08);
  margin-bottom: 20px;
  padding: 26px 24px;
}

.hero h1 {
  color: var(--brand-deep);
  font-size: 40px;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin: 0 0 12px;
}

.hero p {
  color: var(--text-muted);
  font-size: 18px;
  margin: 0;
  max-width: 720px;
}

.meta {
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 14px;
  text-transform: uppercase;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.nav a {
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--brand-deep);
  font-size: 14px;
  font-weight: 700;
  padding: 10px 14px;
  text-decoration: none;
}

.card h2 {
  color: var(--brand-deep);
  font-size: 23px;
  letter-spacing: -0.02em;
  margin: 0 0 10px;
}

.card h3 {
  color: var(--brand-deep);
  font-size: 18px;
  margin: 22px 0 10px;
}

.card p,
.card li {
  color: var(--text);
  font-size: 16px;
}

.card ul,
.card ol {
  margin: 12px 0 0 22px;
  padding: 0;
}

.card li + li {
  margin-top: 8px;
}

.highlight,
.notice {
  border-radius: 18px;
  margin-top: 16px;
  padding: 16px 18px;
}

.highlight {
  background: #f8e6be;
  border: 1px solid #ead4a1;
}

.notice {
  background: #e6f0e5;
  border: 1px solid #cde0cb;
}

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

.footer {
  color: var(--text-muted);
  font-size: 14px;
  margin-top: 26px;
}

@media (max-width: 720px) {
  .shell {
    padding: 20px 14px 40px;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero p {
    font-size: 16px;
  }
}