:root {
  --paper: #ffffff;
  --ink: #16382b;
  --ink-deep: #0e2a1f;
  --ink-soft: #5a7668;
  --seal: #c73e2d;
  --seal-soft: #fbedea;
  --line: #dce3da;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  -webkit-font-smoothing: antialiased;
  line-height: 1.8;
}

.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.brand {
  font-family: "Zen Old Mincho", "Hiragino Mincho ProN", serif;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin: 0 0 40px;
}

.accent {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--seal);
}

h1 {
  font-family: "Zen Old Mincho", "Hiragino Mincho ProN", serif;
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.5;
  margin: 0 0 8px;
}

.lead {
  color: var(--ink-soft);
  font-size: 1rem;
  margin: 0 0 40px;
}

h2 {
  font-family: "Zen Old Mincho", "Hiragino Mincho ProN", serif;
  font-size: 1.15rem;
  font-weight: 700;
  margin: 40px 0 12px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

h2:first-of-type {
  border-top: none;
  padding-top: 0;
}

p,
li {
  font-size: 0.95rem;
}

ul {
  padding-left: 1.4em;
}

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

a:hover {
  color: var(--seal);
}

.notice {
  margin-top: 48px;
  padding: 16px 18px;
  border-left: 3px solid var(--seal);
  background: var(--seal-soft);
  font-size: 0.88rem;
  color: #8f2c20;
  border-radius: 0 4px 4px 0;
}

footer {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 0.8rem;
  color: var(--ink-soft);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.error-page {
  text-align: center;
  padding-top: 120px;
}