:root {
  --paper: #fbf7ef;
  --ink: #2d302b;
  --muted: #666961;
  --sage: #70826d;
  --sage-pale: #e9eee5;
  --coral: #bf765b;
  --coral-pale: #f8e5dc;
  --line: #dedbd1;
  --white: #fffdf9;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  line-height: 1.85;
}

a { color: inherit; }

.wrap { width: min(100% - 32px, 760px); margin: 0 auto; }

header {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  background: rgba(251, 247, 239, 0.94);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.brand {
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .03em;
  text-decoration: none;
}

nav { display: flex; gap: 13px; }

nav a {
  color: var(--muted);
  font-size: 12px;
  text-decoration: none;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--coral);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
}

.hero { padding: 70px 0 52px; }

h1, h2, h3 { line-height: 1.42; letter-spacing: .01em; }

h1 { margin: 0; font-size: clamp(31px, 7vw, 48px); }
h2 { margin: 0; font-size: clamp(24px, 4vw, 31px); }
h3 { margin: 0; font-size: 18px; }

.lead {
  max-width: 620px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 16px;
}

.notice {
  margin-top: 26px;
  padding: 15px 17px;
  border-left: 4px solid var(--coral);
  border-radius: 0 10px 10px 0;
  background: var(--coral-pale);
  color: #654438;
  font-size: 13px;
}

main { padding-bottom: 72px; }

section { padding: 48px 0; }

section + section { border-top: 1px solid var(--line); }

.section-intro { margin: 13px 0 0; color: var(--muted); }

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 24px;
}

.card {
  display: flex;
  min-height: 196px;
  flex-direction: column;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--white);
  text-decoration: none;
  transition: transform .15s ease, border-color .15s ease;
}

.card:hover { border-color: var(--sage); transform: translateY(-2px); }

.card .number {
  color: var(--coral);
  font-size: 12px;
  font-weight: 700;
}

.card h3 { margin-top: 18px; }
.card p { margin: 10px 0 0; color: var(--muted); font-size: 13px; }
.card .arrow { margin-top: auto; color: var(--sage); font-size: 13px; font-weight: 700; }

.check-list { display: grid; gap: 11px; margin: 23px 0 0; padding: 0; list-style: none; }

.check-list li {
  position: relative;
  padding: 15px 16px 15px 48px;
  border-radius: 10px;
  background: var(--sage-pale);
}

.check-list li::before {
  position: absolute;
  top: 17px;
  left: 17px;
  width: 16px;
  height: 16px;
  border: 2px solid var(--sage);
  border-radius: 4px;
  content: "";
}

.guide {
  margin-top: 24px;
  padding: 25px;
  border-radius: 15px;
  background: #eee9dc;
}

.guide p { margin: 10px 0 0; color: var(--muted); }

.pill {
  display: inline-block;
  margin: 0 0 9px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--coral-pale);
  color: #8e563f;
  font-size: 12px;
  font-weight: 700;
}

.article { padding-top: 48px; }

.article h2 { margin-top: 50px; }

.article p { margin: 17px 0 0; }

.article .intro { color: var(--muted); font-size: 17px; }

.steps { display: grid; gap: 13px; margin: 24px 0 0; }

.step {
  padding: 19px 19px 19px 68px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--white);
  position: relative;
}

.step > span {
  position: absolute;
  top: 19px;
  left: 18px;
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 50%;
  background: var(--sage);
  color: white;
  font-size: 13px;
  font-weight: 700;
}

.step p { margin: 5px 0 0; color: var(--muted); font-size: 14px; }

.question-box {
  margin-top: 24px;
  padding: 23px;
  border-radius: 14px;
  background: var(--coral-pale);
}

.question-box ul, .sources ul { margin: 12px 0 0; padding-left: 1.25em; }

.question-box li + li { margin-top: 8px; }

.timeline { display: grid; gap: 12px; margin-top: 26px; }

.timeline article {
  padding: 20px;
  border-left: 4px solid var(--sage);
  border-radius: 0 12px 12px 0;
  background: var(--white);
}

.timeline article:nth-child(2) { border-left-color: var(--coral); }
.timeline article:nth-child(3) { border-left-color: #b59951; }
.timeline article:nth-child(4) { border-left-color: #77859a; }

.timeline p { margin: 6px 0 0; color: var(--muted); font-size: 14px; }

.article-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 46px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 47px;
  padding: 0 18px;
  border-radius: 9px;
  background: var(--sage);
  color: white;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.button.secondary { background: var(--white); border: 1px solid var(--line); color: var(--ink); }

.sources {
  margin-top: 48px;
  padding: 22px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.sources a { color: #496248; }

footer { padding: 28px 0 38px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
footer p { margin: 7px 0 0; }

@media (max-width: 620px) {
  .cards { grid-template-columns: 1fr; }
  .card { min-height: 154px; }
  .hero { padding: 52px 0 36px; }
  nav { gap: 9px; }
  nav a { font-size: 11px; }
}