:root {
  --navy: #06254d;
  --red: #f50022;
  --teal: #007d99;
  --paper: #fffcf4;
  font-family: 'Hiragino Kaku Gothic ProN', 'Yu Gothic', Meiryo, sans-serif;
  color: var(--navy);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--navy); font-weight: 600; }
a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 3px solid #f9b600; outline-offset: 3px; }

.content-site-header {
  background: #fff;
  border-bottom: 1px solid #e6edf0;
}

.content-site-header__inner {
  width: min(1180px, calc(100% - 40px));
  min-height: 82px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.content-site-header img { display: block; width: 180px; height: auto; }
.content-home-link,
.content-back-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  border-radius: 999px;
  background: var(--teal);
  color: #fff;
  font-size: 14px;
  font-weight: 800;
}

.content-archive-hero {
  padding: 64px 20px 58px;
  text-align: center;
  background: linear-gradient(180deg, #dcf6ff 0%, #f5fbfa 72%, var(--paper) 100%);
}

.content-archive-hero__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 62px;
  height: 62px;
  margin: 0 auto 15px;
  border-radius: 50%;
  background: #fff;
  color: var(--teal);
  font-size: 29px;
  box-shadow: 0 8px 24px rgba(0, 50, 80, .1);
}
.content-archive-hero__icon svg { width: 32px; height: 32px; }

.content-archive-hero h1 { margin: 0; font-size: clamp(32px, 5vw, 56px); line-height: 1.2; }
.content-archive-hero p { margin: 12px 0 0; font-size: 15px; line-height: 1.8; font-weight: 500; }

.content-archive-main {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 54px 0 80px;
}

.content-gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 30px 22px;
}

.content-gallery-card {
  margin: 0;
  overflow: hidden;
  border-radius: 18px;
  background: #fff;
  border: 1px solid #eee8dd;
  box-shadow: 0 8px 28px rgba(0, 40, 75, .08);
}

.content-gallery-thumb {
  aspect-ratio: 1 / 1;
  overflow: hidden;
}

.content-gallery-card img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.content-gallery-card figcaption { padding: 15px 17px 17px; font-size: 14px; line-height: 1.7; }

.content-voice-list { display: grid; gap: 18px; max-width: 860px; margin: 0 auto; }
.content-voice-card {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  padding: 24px 26px;
  border: 1px solid #eee8dd;
  border-radius: 22px;
  background: #fff;
  box-shadow: 0 8px 25px rgba(0, 40, 75, .07);
}

.content-voice-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 48px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #f3c55d;
  color: #fff;
  font-size: 27px;
}

.content-voice-copy { min-width: 0; }
.content-voice-copy h2 { margin: 0 0 8px; font-size: 20px; line-height: 1.5; }
.content-voice-copy__body { font-size: 15px; line-height: 1.9; font-weight: 500; }
.content-voice-copy__body > :first-child { margin-top: 0; }
.content-voice-copy__body > :last-child { margin-bottom: 0; }
.content-voice-profile { display: block; margin-top: 8px; color: #687888; font-size: 13px; }

.content-empty { padding: 48px 20px; border-radius: 20px; background: #f4f3ed; text-align: center; line-height: 1.8; }
.content-back { margin-top: 48px; text-align: center; }

.stamp-archive-line-icon{border-radius:14px;background:#00b943;color:#fff;font-size:15px;font-weight:900;letter-spacing:-.5px}
.stamp-set-list{display:grid;gap:34px}
.stamp-set-card{padding:28px;border:1px solid #eee8dd;border-radius:24px;background:#fff;box-shadow:0 8px 28px rgba(0,40,75,.07)}
.stamp-set-card__header{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:24px}
.stamp-set-card__header h2{margin:0 0 5px;font-size:26px;line-height:1.35}
.stamp-set-card__header time{font-size:12px;color:#6d7c89;font-weight:500}
.stamp-store-link{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:9px 18px;border-radius:999px;background:#00b943;color:#fff;font-size:13px;font-weight:800;white-space:nowrap}
.stamp-set-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.stamp-set-thumb{aspect-ratio:320/270;display:flex;align-items:center;justify-content:center;overflow:hidden;border-radius:12px;background:#f8faf9}
.stamp-set-thumb img{display:block;width:100%;height:100%;object-fit:contain}

.content-site-footer {
  padding: 40px 20px;
  background: #052650;
  color: #fff;
  text-align: center;
}

.content-site-footer img { display: block; width: 180px; margin: 0 auto 20px; filter: brightness(0) invert(1); }
.content-site-footer nav { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px 22px; margin-bottom: 20px; font-size: 13px; }
.content-site-footer small { color: #d6e3ed; font-size: 12px; font-weight: 400; }

@media (max-width: 767px) {
  .content-site-header__inner { width: calc(100% - 28px); min-height: 68px; }
  .content-site-header img { width: 138px; }
  .content-home-link { min-height: 38px; padding: 8px 15px; font-size: 12px; }
  .content-archive-hero { padding: 46px 18px 42px; }
  .content-archive-hero__icon { width: 54px; height: 54px; font-size: 25px; }
  .content-archive-hero__icon svg { width: 28px; height: 28px; }
  .content-archive-hero h1 { font-size: 32px; }
  .content-archive-hero p { font-size: 13px; }
  .content-archive-main { width: calc(100% - 28px); padding: 34px 0 56px; }
  .content-gallery-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px 10px; }
  .content-gallery-card { border-radius: 10px; }
  .content-gallery-card figcaption { padding: 10px 11px 12px; font-size: 12px; }
  .content-voice-list { gap: 12px; }
  .content-voice-card { gap: 11px; padding: 16px 15px; border-radius: 18px; }
  .content-voice-avatar { flex-basis: 38px; width: 38px; height: 38px; font-size: 21px; }
  .content-voice-copy h2 { font-size: 16px; margin-bottom: 5px; }
  .content-voice-copy__body { font-size: 13px; line-height: 1.75; }
  .content-voice-profile { font-size: 11px; }
  .stamp-set-list { gap: 20px; }
  .stamp-set-card { padding: 18px 14px; border-radius: 18px; }
  .stamp-set-card__header { display: block; margin-bottom: 16px; }
  .stamp-set-card__header h2 { font-size: 20px; }
  .stamp-store-link { margin-top: 12px; min-height: 38px; padding: 8px 15px; font-size: 12px; }
  .stamp-set-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .stamp-set-thumb { border-radius: 8px; }
  .content-site-footer { padding: 34px 16px; }
}