:root {
  --bg: #eef3f8;
  --surface: rgba(255, 255, 255, 0.96);
  --text: #1a233a;
  --muted: #5f6679;
  --line: #1a233a;
  --accent1: #ff8a8a;
  --accent2: #9adbc8;
  --border: rgba(26, 35, 58, 0.12);
  --shadow: 0 24px 60px rgba(26, 35, 58, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Avenir Next", "Hiragino Sans", "Yu Gothic", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(255, 138, 138, 0.18), transparent 26%),
    radial-gradient(circle at top left, rgba(154, 219, 200, 0.2), transparent 24%),
    var(--bg);
}

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

.page {
  max-width: 920px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

.hero,
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.hero {
  padding: 32px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent1);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.03;
}

h2 {
  margin: 0 0 14px;
  font-size: 22px;
}

p,
li {
  line-height: 1.72;
  color: var(--muted);
}

.lede {
  margin-top: 16px;
  max-width: 58ch;
  font-size: 17px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.card {
  padding: 24px;
}

.card strong {
  display: block;
  margin-bottom: 10px;
  color: var(--text);
  font-size: 18px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 800;
}

.button-primary {
  color: var(--text);
  background: var(--accent2);
}

.button-secondary {
  color: var(--text);
  background: rgba(255, 138, 138, 0.18);
}

.section {
  margin-top: 20px;
  padding: 24px;
}

.list {
  margin: 0;
  padding-left: 20px;
}

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

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 14px;
}

.mono {
  font-variant-numeric: tabular-nums;
}

@media (max-width: 640px) {
  .page {
    padding: 24px 16px 56px;
  }

  .hero,
  .card,
  .section {
    padding: 20px;
    border-radius: 20px;
  }
}