:root {
  color-scheme: light;
  --ink: #16202a;
  --muted: #53606d;
  --line: #c8d2dc;
  --soft: #f4f7fa;
  --panel: #ffffff;
  --blue: #1d5f87;
  --green: #1f6b57;
  --rose: #8a3650;
  --gold: #85640f;
  --shadow: 0 18px 50px rgba(22, 32, 42, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #eef3f7;
  color: var(--ink);
  font-family: "Segoe UI", Arial, sans-serif;
  line-height: 1.55;
}

a {
  color: var(--blue);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px max(24px, calc((100vw - 1180px) / 2));
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 220px;
}

.brand strong {
  font-size: 17px;
  line-height: 1.2;
}

.brand span {
  color: var(--muted);
  font-size: 12px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  justify-content: flex-end;
}

.nav a {
  color: #273441;
  font-size: 13px;
  text-decoration: none;
}

.hero,
.content {
  max-width: 1180px;
  margin: 0 auto;
  padding: 34px 24px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 480px);
  align-items: center;
  gap: 34px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--green);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  letter-spacing: 0;
  line-height: 1.15;
}

h1 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(40px, 7vw, 72px);
}

h2 {
  margin: 0 0 16px;
  font-size: 30px;
}

h3 {
  margin: 26px 0 10px;
  font-size: 21px;
}

.lead {
  max-width: 760px;
  margin: 20px 0 0;
  color: #324250;
  font-size: 18px;
}

.callouts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.callout {
  padding: 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.callout strong {
  display: block;
  margin-bottom: 6px;
}

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

.map {
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.map img {
  display: block;
  width: 100%;
  height: auto;
}

.band {
  background: #fff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.wide-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
}

.card p,
.card li {
  color: #344656;
}

.card p:last-child {
  margin-bottom: 0;
}

.tag {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.rule-list {
  display: grid;
  gap: 10px;
  padding: 0;
  list-style: none;
}

.rule-list li {
  padding: 14px 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-left: 5px solid var(--green);
  border-radius: 8px;
}

.warning {
  border-left-color: var(--rose) !important;
}

.mono {
  font-family: Consolas, "Liberation Mono", monospace;
}

pre {
  overflow-x: auto;
  padding: 16px;
  background: #14202b;
  color: #edf6ff;
  border-radius: 8px;
  font-size: 13px;
  line-height: 1.45;
}

code {
  font-family: Consolas, "Liberation Mono", monospace;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid var(--line);
}

th,
td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: #f3f7fa;
}

.footer {
  max-width: 1180px;
  margin: 0 auto;
  padding: 30px 24px 48px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 900px) {
  .topbar {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    justify-content: flex-start;
  }

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

  .callouts,
  .grid,
  .wide-grid {
    grid-template-columns: 1fr;
  }
}