:root {
  --bg: #fffaf4;
  --surface: #ffffff;
  --text: #1d1a17;
  --muted: #6b635b;
  --line: #eadfd3;
  --accent: #e8730c;
  --accent-text: #ffffff;
  --highlight: #fff1e3;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171411;
    --surface: #221e1a;
    --text: #f3ede6;
    --muted: #a99f94;
    --line: #3a332c;
    --accent: #ff9a3d;
    --accent-text: #1d1a17;
    --highlight: #2c231b;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.75 -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Noto Sans KR", "PingFang SC", "PingFang TC", "Segoe UI", sans-serif;
  -webkit-text-size-adjust: 100%;
}
a { color: var(--accent); }
main, .site-header, .site-nav, .site-footer { max-width: 760px; margin: 0 auto; padding: 0 16px; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-top: 16px; padding-bottom: 8px; }
.brand { display: flex; align-items: center; gap: 8px; color: var(--text); text-decoration: none; font-weight: 700; font-size: 18px; }
.brand img { border-radius: 7px; }
.language { position: relative; display: flex; align-items: center; gap: 6px; color: var(--muted); }
.language select {
  font: inherit; font-size: 14px; color: var(--text); background: var(--surface);
  border: 1px solid var(--line); border-radius: 999px; padding: 6px 12px; max-width: 46vw;
}
.site-nav { display: flex; flex-wrap: wrap; gap: 4px 16px; padding-bottom: 12px; border-bottom: 1px solid var(--line); font-size: 14px; }
.site-nav a, .site-footer nav a { color: var(--muted); text-decoration: none; }
.site-nav a[aria-current="page"] { color: var(--text); font-weight: 600; }
main { padding-top: 24px; padding-bottom: 48px; }
h1 { font-size: 28px; line-height: 1.3; margin: 8px 0 16px; }
h2 { font-size: 20px; line-height: 1.4; margin: 32px 0 8px; }
h3 { font-size: 16px; margin: 0 0 4px; }
p, li { overflow-wrap: anywhere; }
ul { padding-left: 1.3em; }
li + li { margin-top: 4px; }
.hero { text-align: center; padding: 24px 0 8px; }
.hero .icon { border-radius: 28px; box-shadow: 0 8px 24px rgba(232, 115, 12, 0.25); }
.hero h1 { font-size: 36px; margin: 16px 0 4px; }
.tagline { font-size: 20px; font-weight: 600; margin: 0 0 12px; }
.lead { color: var(--muted); text-align: left; }
.button {
  display: inline-block; margin: 12px 0; padding: 12px 24px; border-radius: 999px;
  background: var(--accent); color: var(--accent-text); font-weight: 600; text-decoration: none;
}
.button.disabled { background: var(--line); color: var(--muted); }
.highlight { background: var(--highlight); border-radius: 16px; padding: 4px 20px 12px; margin-top: 32px; }
.highlight h2 { margin-top: 16px; }
.features { list-style: none; padding: 0; display: grid; gap: 12px; }
.features li { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px; margin: 0; }
.features p { margin: 0; color: var(--muted); }
.faq details { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 12px 16px; margin-bottom: 8px; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq details p { margin: 8px 0 0; color: var(--muted); }
.note { font-size: 14px; color: var(--muted); }
.date { margin-top: 32px; color: var(--muted); font-size: 14px; }
.site-footer { border-top: 1px solid var(--line); padding-top: 16px; padding-bottom: 32px; font-size: 14px; color: var(--muted); }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 4px 16px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
@media (min-width: 640px) {
  .features { grid-template-columns: 1fr 1fr; }
}