:root {
  color-scheme: light;
  --ink: #19212d;
  --muted: #526174;
  --line: #dce3eb;
  --paper: #ffffff;
  --canvas: #f3f6fa;
  --accent: #185adb;
  --accent-dark: #1248b7;
  --soft: #eaf0ff;
  font-family: Inter, "Segoe UI", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.65;
}

a {
  color: var(--accent);
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--accent-dark);
}

.shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.topbar {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 750;
  letter-spacing: -0.02em;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 12px;
  background: var(--accent);
  color: white;
  font-size: 19px;
  font-weight: 800;
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}

.nav a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
}

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

main {
  padding: 48px 0 72px;
}

.hero {
  padding: clamp(32px, 7vw, 76px);
  border: 1px solid var(--line);
  border-radius: 28px;
  background:
    radial-gradient(ellipse at 92% 8%, #dce8ff 0, transparent 34%),
    var(--paper);
  box-shadow: 0 18px 50px rgb(25 33 45 / 6%);
}

.eyebrow {
  color: var(--accent);
  font-size: 13px;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.2;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 760px;
  margin: 16px 0;
  font-size: clamp(38px, 6vw, 66px);
}

h2 {
  margin: 0 0 14px;
  font-size: clamp(25px, 4vw, 34px);
}

h3 {
  margin: 28px 0 8px;
  font-size: 19px;
}

.lead {
  max-width: 720px;
  color: var(--muted);
  font-size: clamp(18px, 2.4vw, 21px);
}

.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border: 1px solid var(--accent);
  border-radius: 12px;
  background: var(--accent);
  color: white;
  font-weight: 700;
  text-decoration: none;
}

.button:hover {
  background: var(--accent-dark);
  color: white;
}

.button.secondary {
  background: white;
  color: var(--accent);
}

.button.secondary:hover {
  background: var(--soft);
}

.notice {
  margin-top: 24px;
  padding: 16px 18px;
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  background: var(--soft);
  color: #23395f;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
}

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

.card h3 {
  margin-top: 0;
}

.page-heading {
  margin-bottom: 22px;
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--paper);
}

.page-heading h1 {
  margin: 8px 0;
  font-size: clamp(34px, 5vw, 48px);
}

.page-content {
  padding: clamp(24px, 5vw, 54px);
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--paper);
}

.page-content section + section {
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid var(--line);
}

.page-content p,
.page-content li {
  color: #344255;
}

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

.date {
  color: var(--muted);
  font-size: 14px;
}

.footer {
  padding: 28px 0;
  border-top: 1px solid var(--line);
  background: var(--paper);
  color: var(--muted);
  font-size: 14px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--muted);
}

@media (max-width: 760px) {
  .shell {
    width: min(100% - 28px, 600px);
  }

  .topbar-inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding: 16px 0;
  }

  .nav {
    gap: 16px;
  }

  main {
    padding: 24px 0 44px;
  }

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}