* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Noto Sans JP', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  color: #0f172a;
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

body.menu-open {
  overflow: hidden;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 1.75rem 1.5rem 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 3;
  pointer-events: none;
}

.menu-toggle {
  position: absolute;
  left: 1.5rem;
  top: 1.75rem;
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  width: 26px;
  height: 20px;
  border: none;
  background: none;
  padding: 0;
  cursor: pointer;
  color: #111827;
  pointer-events: auto;
}

.menu-toggle:focus-visible {
  outline: 2px solid #2563eb;
  outline-offset: 4px;
}

.menu-toggle .bar {
  height: 2px;
  width: 100%;
  background-color: currentColor;
  transition: transform 0.25s ease, opacity 0.25s ease, background-color 0.25s ease;
}

.menu-toggle.is-open .bar:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.menu-toggle.is-open .bar:nth-child(2) {
  opacity: 0;
}

.menu-toggle.is-open .bar:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

.menu-toggle.is-open .bar {
  background-color: #f8fafc;
}

.brand {
  pointer-events: auto;
}

.brand-logo {
  width: 140px;
  height: auto;
}

.content {
  padding: 8rem 1.5rem 5rem;
  max-width: 1080px;
  margin: 0 auto;
  display: grid;
  gap: 3.5rem;
}

.content-hero {
  text-align: center;
  display: grid;
  gap: 1.25rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.75rem;
  color: #64748b;
  margin: 0;
}

.content-hero h1 {
  margin: 0;
  font-size: clamp(2.1rem, 6vw, 3rem);
  letter-spacing: 0.04em;
}

.content-hero .lead {
  margin: 0 auto;
  max-width: 48rem;
  line-height: 1.8;
  color: #475467;
}

.content-collection {
  display: grid;
  gap: 1.5rem;
}

.collection-items {
  display: grid;
  gap: 1.5rem;
}

.collection-card {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 22px;
  padding: 1.75rem;
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.12);
  display: grid;
  gap: 1.25rem;
}

.collection-card h2 {
  margin: 0;
  font-size: 1.3rem;
}

.card-meta {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: #94a3b8;
}

.card-summary {
  margin: 0;
  line-height: 1.7;
  color: #475467;
}

.card-link {
  justify-self: start;
  color: #2563eb;
  text-decoration: none;
  font-weight: 600;
}

.card-link:hover,
.card-link:focus-visible {
  text-decoration: underline;
}

.card-media img,
.card-media video {
  width: 100%;
  border-radius: 18px;
  object-fit: cover;
}

.collection-empty {
  margin: 0;
  padding: 1rem 1.25rem;
  border-radius: 14px;
  background: rgba(241, 245, 249, 0.8);
  color: #475467;
}

.loading-indicator {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: #475467;
  font-size: 0.95rem;
}

.loading-indicator::before {
  content: '';
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid rgba(37, 99, 235, 0.2);
  border-top-color: #2563eb;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.site-nav {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.94);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  z-index: 2;
}

.site-nav.open {
  display: flex;
}

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  text-align: center;
}

.site-nav li + li {
  margin-top: 1.5rem;
}

.site-nav a {
  color: #f8fafc;
  text-decoration: none;
  font-size: 1.35rem;
  letter-spacing: 0.1em;
}

@media (min-width: 768px) {
  .content {
    padding: 9rem 2.5rem 6rem;
  }

  .site-header {
    padding: 2rem 2.5rem 0;
  }

  .menu-toggle {
    left: 2.5rem;
    top: 2rem;
    width: 28px;
    height: 22px;
  }

  .brand-logo {
    width: 160px;
  }

  .collection-items {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2rem;
  }

  .collection-card {
    padding: 2rem;
  }
}

@media (min-width: 1024px) {
  .collection-items[data-layout="grid"] {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}