:root {
  --world-font-sans: "Noto Sans JP", "Hiragino Sans", "Yu Gothic UI", "Yu Gothic", system-ui, -apple-system, sans-serif;
  --world-page-background: #f4f3ee;
  --world-shell-surface: #fffefa;
  --world-shell-background: var(--world-page-background);
  --world-shell-ink: #101a17;
  --world-shell-sub: #59645f;
  --world-shell-line: #d9d8d1;
  --world-shell-accent: #137861;
  --world-shell-accent-deep: #0e604d;
  --world-shell-accent-soft: #e7f0ed;
}
html,
body {
  background-color: var(--world-page-background);
  font-family: var(--world-font-sans);
}
button,
input,
select,
textarea {
  font-family: inherit;
}
.world-shell-header,
.world-shell-footer {
  color: var(--world-shell-ink);
  font-family: var(--world-font-sans);
}
.world-shell-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: 78px;
  border-bottom: 1px solid var(--world-shell-line);
  background: rgba(255,254,250,.97);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(255,255,255,.84) inset;
}
.world-shell-header__inner {
  width: min(1240px, calc(100% - 48px));
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 30px;
}
.world-shell-context {
  min-width: 0;
  display: inline-flex;
  align-items: center;
  gap: 15px;
}
.world-shell-brand {
  display: inline-flex;
  align-items: center;
  gap: 15px;
  flex: none;
  color: inherit;
  text-decoration: none;
}
.world-shell-brand__mark {
  position: relative;
  display: block;
  width: 39px;
  height: 45px;
  flex: none;
  border: 2px solid var(--world-shell-accent);
  border-radius: 9px;
  background: var(--world-shell-surface);
  box-shadow:
    inset 8px 0 0 #eef3f1,
    inset 17px 0 0 var(--world-shell-surface),
    inset 22px 0 0 #eef3f1,
    inset 31px 0 0 var(--world-shell-surface),
    0 1px 2px rgba(16,26,23,.05);
}
.world-shell-brand__mark::after {
  content: "";
  position: absolute;
  right: -5px;
  bottom: -5px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--world-shell-accent);
  box-shadow: 0 0 0 3px var(--world-shell-surface);
}
.world-shell-brand__copy strong {
  display: block;
  font-size: 22px;
  line-height: 1;
  font-weight: 760;
  letter-spacing: -.055em;
}
.world-shell-brand__copy small {
  display: block;
  margin-top: 4px;
  color: var(--world-shell-sub);
  font-size: 11px;
  letter-spacing: .05em;
}
.world-shell-divider {
  width: 1px;
  height: 29px;
  background: var(--world-shell-line);
}
.world-shell-product {
  overflow: hidden;
  max-width: 180px;
  color: var(--world-shell-ink);
  font-size: 17px;
  letter-spacing: -.025em;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.world-shell-badge {
  padding: 7px 12px;
  border: 1px solid #c7ddd7;
  border-radius: 999px;
  background: var(--world-shell-accent-soft);
  color: var(--world-shell-accent-deep);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .06em;
}
.world-shell-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
  color: var(--world-shell-sub);
  font-size: 13px;
  font-weight: 650;
}
.world-shell-nav a {
  color: inherit;
  text-decoration: none;
}
.world-shell-nav a:hover,
.world-shell-footer__nav a:hover {
  color: var(--world-shell-accent);
}
.world-shell-toggle {
  display: none;
  margin-left: auto;
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--world-shell-line);
  border-radius: 10px;
  background: var(--world-shell-surface);
  color: var(--world-shell-ink);
  font: inherit;
  font-size: 13px;
  font-weight: 700;
}
.world-shell-actions {
  display: flex;
  align-items: center;
  margin-left: auto;
}
.world-shell-nav + .world-shell-actions { margin-left: 0; }
.world-shell-action {
  min-height: 45px;
  padding: 0 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 11px;
  cursor: pointer;
  color: #fff;
  font: inherit;
  font-size: 13px;
  font-weight: 720;
  text-decoration: none;
  transition: background-color .18s, border-color .18s, transform .18s;
}
.world-shell-action:hover { transform: translateY(-1px); }
.world-shell-action--primary { background: var(--world-shell-accent); }
.world-shell-action--primary:hover { background: var(--world-shell-accent-deep); }
.world-shell-action--secondary {
  border-color: #c5ddd6;
  background: var(--world-shell-accent-soft);
  color: var(--world-shell-accent-deep);
}
.world-shell-footer {
  margin-top: 42px;
  border-top: 1px solid var(--world-shell-line);
  background: var(--world-shell-background);
}
.world-shell-footer__inner {
  width: min(1240px, calc(100% - 48px));
  margin: 0 auto;
  padding: 34px 0 32px;
  display: grid;
  grid-template-columns: auto minmax(160px, 1fr) auto;
  align-items: center;
  column-gap: 34px;
  row-gap: 10px;
}
.world-shell-footer__brand .world-shell-brand__mark {
  transform: scale(.86);
  transform-origin: left center;
}
.world-shell-footer__description {
  margin: 0;
  color: var(--world-shell-sub);
  font-size: 13px;
  line-height: 1.7;
}
.world-shell-footer__nav {
  display: flex;
  justify-content: flex-end;
  gap: 20px;
  color: var(--world-shell-sub);
  font-size: 13px;
}
.world-shell-footer__nav a {
  color: inherit;
  text-decoration: none;
}
.world-shell-footer__legal {
  grid-column: 2;
  display: flex;
  gap: 18px;
  color: var(--world-shell-sub);
  font-size: 12px;
}
.world-shell-footer__legal a {
  color: inherit;
  text-decoration: none;
}
.world-shell-footer__legal a:hover { color: var(--world-shell-accent); }
.world-shell-footer__copyright {
  grid-column: 3;
  justify-self: end;
  color: var(--world-shell-sub);
  font-size: 12px;
}
@media (max-width: 820px) {
  .world-shell-header { height: 70px; }
  .world-shell-header__inner,
  .world-shell-footer__inner { width: min(100% - 28px, 1240px); }
  .world-shell-brand { gap: 12px; }
  .world-shell-brand__mark { width: 34px; height: 40px; }
  .world-shell-brand__copy strong { font-size: 20px; }
  .world-shell-brand__copy small { display: none; }
  .world-shell-product { max-width: 122px; font-size: 15px; }
  .world-shell-divider { height: 22px; }
  .world-shell-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .world-shell-nav {
    display: none;
    position: absolute;
    top: calc(100% + 1px);
    left: 14px;
    right: 14px;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px;
    border: 1px solid var(--world-shell-line);
    border-radius: 12px;
    background: var(--world-shell-surface);
    box-shadow: 0 18px 34px rgba(16,26,23,.12);
  }
  .world-shell-nav.is-open { display: flex; }
  .world-shell-nav a { padding: 12px 11px; }
  .world-shell-action { min-height: 41px; padding-inline: 13px; }
  .world-shell-footer__inner { display: block; padding-block: 28px; }
  .world-shell-footer__description { margin: 13px 0 18px; }
  .world-shell-footer__nav { justify-content: flex-start; flex-wrap: wrap; margin-bottom: 15px; }
  .world-shell-footer__legal { margin-bottom: 22px; }
  .world-shell-footer__copyright { display: block; }
}
@media (max-width: 560px) {
  .world-shell-header__inner { gap: 10px; }
  .world-shell-product { display: none; }
  .world-shell-badge { display: none; }
  .world-shell-actions { margin-left: auto; }
  .world-shell-nav + .world-shell-actions { margin-left: 0; }
}