:root {
  --bg: #ffffff;
  --surface: #f5f6f8;
  --ink: #1b2230;
  --muted: #5b6475;
  --line: #e3e6eb;
  --accent: #1b2a4a;
  --notice-bg: #fbf1ee;
  --notice-line: #c8553d;
  --maxw: 760px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12151b;
    --surface: #1a1e26;
    --ink: #e7e9ee;
    --muted: #a3aab8;
    --line: #2a303b;
    --accent: #a9bde6;
    --notice-bg: #2a1f1c;
    --notice-line: #e0826d;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.9;
  line-break: strict;
}

body:lang(ko) {
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif;
  line-height: 1.8;
  word-break: keep-all;
}

body:lang(en) { line-height: 1.7; }

/* 일본어 제목은 구절 단위로 줄바꿈 (지원하는 브라우저만), 끊기면 안 되는 구절은 .nw 로 묶는다 */
body:lang(ja) h1, body:lang(ja) h2, body:lang(ja) h3 { word-break: auto-phrase; }
.nw { white-space: nowrap; }

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

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 16px;
}

/* header */
.site-header { border-bottom: 1px solid var(--line); }

.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding-top: 16px;
  padding-bottom: 16px;
}

.wordmark {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
}

.lang {
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
}

.lang a, .lang span {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  text-decoration: none;
}

.lang span[aria-current] {
  background: var(--surface);
  color: var(--ink);
  font-weight: 600;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  width: 100%;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
}

.nav a { color: var(--muted); text-decoration: none; }
.nav a:hover { color: var(--ink); }

/* hero */
.hero { padding: 56px 0 32px; }

.eyebrow {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 14px;
  letter-spacing: 0.08em;
}

h1 {
  margin: 0 0 16px;
  font-size: clamp(26px, 5vw, 34px);
  line-height: 1.45;
}

.lead { margin: 0; color: var(--muted); }

/* sections */
section { padding: 32px 0; }

h2 {
  margin: 0 0 16px;
  font-size: 20px;
  line-height: 1.5;
}

h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

p { margin: 0 0 12px; }

.notice {
  margin: 8px 0 16px;
  padding: 20px 24px;
  background: var(--notice-bg);
  border-left: 4px solid var(--notice-line);
  border-radius: 8px;
}

.notice h2 { font-size: 17px; }
.notice p:last-child { margin-bottom: 0; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.card {
  padding: 18px 20px;
  background: var(--surface);
  border-radius: 10px;
}

.card p { margin: 0; color: var(--muted); font-size: 15px; }

.points { margin: 12px 0 0; padding-left: 1.2em; }
.points li { margin: 4px 0; }

.info {
  display: grid;
  grid-template-columns: 11em 1fr;
  margin: 0;
  border-top: 1px solid var(--line);
}

.info dt, .info dd {
  margin: 0;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.info dt { color: var(--muted); font-size: 15px; }
.info dd { overflow-wrap: anywhere; }

.mail {
  display: inline-block;
  margin: 4px 0 12px;
  padding: 10px 22px;
  border: 1.5px solid var(--accent);
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  overflow-wrap: anywhere;
}

.mail:hover { background: var(--surface); }

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

/* footer */
.site-footer {
  margin-top: 40px;
  padding: 24px 0 40px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.site-footer p { margin: 0 0 4px; }

@media (max-width: 560px) {
  .hero { padding-top: 40px; }
  .info { grid-template-columns: 1fr; }
  .info dt { padding-bottom: 0; border-bottom: 0; }
  .info dd { padding-top: 2px; }
}