:root {
  --bg: #ffffff;
  --surface: #f7f8fa;
  --text: #16191d;
  --muted: #5c6470;
  --line: #e3e6ea;
  --accent: #1f5f4f;
  --accent-soft: #eaf3f0;
  --maxw: 760px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171a;
    --surface: #1c2024;
    --text: #e8eaed;
    --muted: #9aa3ad;
    --line: #2c3238;
    --accent: #6fd3b4;
    --accent-soft: #1d2b28;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN",
    "Hiragino Sans", "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: .01em;
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- header --- */

header {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}

.head-inner {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 22px;
  padding-bottom: 22px;
}

.brand {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-decoration: none;
  color: var(--text);
}

.brand span {
  display: block;
  font-size: .7rem;
  font-weight: 400;
  letter-spacing: .18em;
  color: var(--muted);
  margin-top: 2px;
}

nav a {
  font-size: .86rem;
  color: var(--muted);
  text-decoration: none;
  margin-left: 18px;
}

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

/* --- hero --- */

.hero {
  padding: 72px 0 56px;
}

.hero h1 {
  font-size: clamp(1.5rem, 4.4vw, 2.05rem);
  line-height: 1.55;
  margin: 0 0 20px;
  font-weight: 700;
  letter-spacing: .02em;
}

.hero p {
  margin: 0;
  color: var(--muted);
  max-width: 34em;
}

/* --- sections --- */

section {
  padding: 44px 0;
  border-top: 1px solid var(--line);
}

h2 {
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--accent);
  margin: 0 0 24px;
  text-transform: uppercase;
}

h2 .ja {
  display: block;
  font-size: 1.15rem;
  letter-spacing: .04em;
  color: var(--text);
  text-transform: none;
  margin-top: 6px;
}

/* --- table --- */

.info {
  width: 100%;
  border-collapse: collapse;
}

.info th,
.info td {
  text-align: left;
  vertical-align: top;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: .94rem;
}

.info th {
  width: 9.5em;
  font-weight: 600;
  color: var(--muted);
  padding-right: 16px;
  white-space: nowrap;
}

@media (max-width: 560px) {
  .info th, .info td { display: block; width: auto; }
  .info th { border-bottom: none; padding-bottom: 2px; font-size: .8rem; }
  .info td { padding-top: 0; }
}

/* --- list --- */

ol.biz {
  margin: 0;
  padding-left: 1.4em;
}

ol.biz li {
  padding: 5px 0;
  font-size: .94rem;
}

/* --- notice (koukoku) --- */

.notice {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px 26px;
  margin: 0 0 28px;
}

.notice p { margin: 0; font-size: .92rem; color: var(--muted); }

.empty {
  color: var(--muted);
  font-size: .94rem;
  padding: 8px 0 4px;
}

/* --- footer --- */

footer {
  border-top: 1px solid var(--line);
  padding: 30px 0 44px;
  margin-top: 20px;
}

footer p {
  margin: 0;
  font-size: .8rem;
  color: var(--muted);
}

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

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