:root {
  --bg: #f4f7f8;
  --text: #172026;
  --muted: #5d6b73;
  --card: #ffffff;
  --soft: #fbfdfe;
  --border: #d9e1e5;
  --accent: #0b5f75;
  --accent-dark: #073f4d;
  --max: 1100px;
  --subpage-max: 960px;
}

* {
  box-sizing: border-box;
}

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

a {
  color: inherit;
  text-decoration: none;
}

.wrap {
  width: min(calc(100% - 32px), var(--max));
  margin: 0 auto;
}

header {
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
  background: #ffffff;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.brand {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--accent-dark);
}

nav {
  display: flex;
  gap: 18px;
  color: var(--muted);
  font-size: 0.95rem;
}

nav a {
  font-weight: 400;
}

nav a:hover,
nav a[aria-current="page"] {
  color: var(--accent-dark);
}

body.home main {
  padding: 64px 0;
}

.intro {
  max-width: 760px;
  margin-bottom: 40px;
}

.lead {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 1.2rem;
}

.columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.column {
  display: flex;
  flex-direction: column;
  min-height: 280px;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--card);
}

.column h2 {
  margin: 0;
  font-size: 1.55rem;
  color: var(--accent-dark);
}

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

.column .button {
  margin-top: auto;
}

body.subpage main {
  width: min(calc(100% - 32px), var(--subpage-max));
  margin: 40px auto;
  padding: 44px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--card);
}

.label {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  color: var(--accent-dark);
  line-height: 1.15;
}

h1 {
  margin: 0;
  font-size: clamp(1.8rem, 8vw, 3.6rem);
  letter-spacing: -0.06em;
}

body.home h1 {
  font-size: clamp(1.8rem, 8vw, 3.6rem);
  line-height: 1;
}

h2 {
  margin: 44px 0 14px;
  font-size: 1.5rem;
  letter-spacing: -0.03em;
}

h3 {
  margin: 22px 0 8px;
  font-size: 1.2rem;
}

p {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

main a:not(.button) {
  color: var(--accent);
  font-weight: 700;
}

main a:not(.button):hover {
  color: var(--accent-dark);
  text-decoration: underline;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  color: #ffffff;
  background: var(--accent);
  font-weight: 700;
}

.button:hover {
  color: #ffffff;
  background: var(--accent-dark);
  text-decoration: none;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 22px;
}

.card {
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--soft);
}

.card p {
  margin-top: 8px;
  font-size: 1rem;
}

.facts {
  margin: 12px 0 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.facts li + li {
  margin-top: 4px;
}

.table-wrap {
  margin-top: 18px;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #ffffff;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th,
td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  white-space: nowrap;
}

th {
  color: var(--accent-dark);
  background: var(--soft);
  font-weight: 800;
}

tr:last-child td {
  border-bottom: 0;
}

.hint {
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.95rem;
}

.tiers {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}

.tier {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 14px;
  padding: 14px 0;
  border-top: 1px solid var(--border);
}

.tier strong {
  color: var(--accent-dark);
}

.tier span {
  color: var(--muted);
}

ul {
  margin: 14px 0 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

li + li {
  margin-top: 6px;
}

.note {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.95rem;
}

footer {
  padding: 28px 0;
  border-top: 1px solid var(--border);
  color: var(--muted);
  background: #ffffff;
  font-size: 0.95rem;
}

@media (max-width: 820px) {
  .topbar,
  nav {
    align-items: flex-start;
    flex-direction: column;
  }

  body.home main {
    padding: 44px 0;
  }

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

@media (max-width: 760px) {
  body.subpage main {
    width: min(calc(100% - 32px), var(--subpage-max));
    padding: 28px;
  }

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

  .links,
  .button {
    width: 100%;
  }

  .tier {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}