:root {
  --color-primary: #1b3a5c;
  --color-secondary: #3b82f6;
  --color-text: #1a1a1a;
  --color-muted: #6b7280;
  --color-surface: #f8f9fa;
  --color-border: #e5e7eb;
  --color-white: #ffffff;
  --color-tag: #f3f4f6;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12);
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --content-width: 1120px;
  --transition-fast: 180ms ease;
  --transition-base: 240ms ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", "Noto Sans JP", sans-serif;
  color: var(--color-text);
  background:
    radial-gradient(circle at top left, rgba(59, 130, 246, 0.08), transparent 28%),
    linear-gradient(180deg, #ffffff 0%, #fbfcfd 100%);
  line-height: 1.8;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

:focus-visible {
  outline: 3px solid rgba(59, 130, 246, 0.35);
  outline-offset: 3px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(229, 231, 235, 0.8);
}

.site-shell {
  width: min(var(--content-width), calc(100% - 48px));
  margin: 0 auto;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 80px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  color: var(--color-primary);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-primary), #284f7c);
  box-shadow: var(--shadow-sm);
}

.brand-copy {
  line-height: 1.2;
}

.brand-title {
  display: block;
  font-size: 1rem;
}

.brand-subtitle {
  display: block;
  font-size: 0.78rem;
  color: var(--color-muted);
}

.desktop-nav,
.footer-nav,
.footer-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.desktop-nav a,
.footer-nav a,
.footer-links a {
  position: relative;
  color: var(--color-muted);
  transition: color var(--transition-fast);
}

.desktop-nav a:hover,
.footer-nav a:hover,
.footer-links a:hover {
  color: var(--color-secondary);
}

.desktop-nav a[aria-current="page"] {
  color: var(--color-primary);
  font-weight: 600;
}

.desktop-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -12px;
  height: 3px;
  border-radius: 999px;
  background: var(--color-primary);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-white);
  color: var(--color-primary);
}

.mobile-nav {
  display: none;
  padding: 0 0 20px;
}

.mobile-nav nav {
  display: grid;
  gap: 8px;
  padding-top: 8px;
}

.mobile-nav a {
  padding: 14px 16px;
  border-radius: 12px;
  background: var(--color-surface);
  color: var(--color-primary);
}

.mobile-nav a[aria-current="page"] {
  background: rgba(27, 58, 92, 0.08);
  font-weight: 700;
}

.page-main {
  padding: 48px 0 120px;
}

.section {
  margin-top: 96px;
}

.section-surface {
  padding: 40px;
  border: 1px solid var(--color-border);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(248, 249, 250, 0.92), rgba(255, 255, 255, 0.96));
}

.eyebrow {
  display: inline-block;
  margin-bottom: 16px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(27, 58, 92, 0.08);
  color: var(--color-primary);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.page-hero,
.home-hero {
  display: grid;
  gap: 32px;
  align-items: center;
}

.home-hero {
  grid-template-columns: 1.2fr 1fr;
}

.page-hero {
  grid-template-columns: 1fr;
}

.hero-copy h1,
.page-title {
  margin: 0;
  color: var(--color-primary);
  line-height: 1.2;
}

.hero-copy h1 {
  font-size: clamp(1.75rem, 4vw, 3.35rem);
}

.page-title {
  font-size: clamp(1.75rem, 3.5vw, 2.9rem);
}

.lead {
  margin: 0;
  font-size: 1.05rem;
  color: #334155;
}

.hero-actions,
.button-row,
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 32px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-weight: 600;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    background-color var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.button-primary:hover {
  opacity: 0.92;
}

.button-secondary {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: transparent;
}

.hero-stats,
.info-grid,
.card-grid,
.works-grid,
.gallery-grid,
.timeline {
  display: grid;
  gap: 24px;
}

.hero-stats {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.info-grid,
.card-grid,
.gallery-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.works-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card,
.timeline-item,
.gallery-card,
.work-card,
.status-card {
  height: 100%;
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover,
.gallery-card:hover,
.work-card:hover,
.status-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.nav-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card-title,
.work-card h3,
.gallery-card h3,
.timeline-item h3,
.status-card h3 {
  margin: 0;
  font-size: 1.25rem;
}

.muted,
.meta,
.card p,
.work-card p,
.gallery-card p,
.timeline-item p,
.status-card p {
  margin: 0;
  color: var(--color-muted);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--color-tag);
  color: #374151;
  font-size: 0.875rem;
}

.hero-visual,
.visual-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: 24px;
  background: var(--color-surface);
}

.hero-visual {
  min-height: 420px;
  box-shadow: 0 18px 48px rgba(27, 58, 92, 0.12);
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(27, 58, 92, 0.05), rgba(27, 58, 92, 0.38));
}

.hero-note {
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: 24px;
  padding: 20px;
  border-radius: 20px;
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.84);
  box-shadow: var(--shadow-sm);
}

.hero-note strong {
  display: block;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.split-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

.feature-list {
  display: grid;
  gap: 16px;
}

.feature-item {
  padding: 20px;
  border-left: 4px solid var(--color-primary);
  border-radius: 0 16px 16px 0;
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.feature-item strong,
.timeline-year {
  display: block;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.works-feature {
  display: grid;
  gap: 24px;
  padding: 32px;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(27, 58, 92, 0.96), rgba(37, 99, 235, 0.88));
  color: var(--color-white);
}

.works-feature p,
.works-feature .meta {
  color: rgba(255, 255, 255, 0.82);
}

.works-feature h2 {
  margin: 0;
  font-size: clamp(1.5rem, 2vw, 2.2rem);
}

.work-card {
  display: grid;
  gap: 16px;
}

.work-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.work-links .button {
  min-height: 40px;
  padding: 8px 18px;
}

.gallery-card figure,
.gallery-card img {
  margin: 0;
}

.gallery-card img,
.work-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 14px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

.gallery-card {
  display: grid;
  gap: 16px;
}

.timeline {
  gap: 20px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  align-items: start;
  gap: 24px;
}

.timeline-year {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
}

.timeline-body {
  display: grid;
  gap: 8px;
}

.status-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(59, 130, 246, 0.12);
  color: var(--color-secondary);
  font-size: 0.8rem;
  font-weight: 600;
}

.footer {
  border-top: 1px solid var(--color-border);
  background: rgba(248, 249, 250, 0.92);
}

.footer-row {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 24px;
  padding: 32px 0 48px;
}

.footer-copy {
  color: var(--color-muted);
  font-size: 0.95rem;
}

.redirect-page {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 24px;
}

.redirect-card {
  max-width: 480px;
  padding: 32px;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  background: var(--color-white);
  box-shadow: var(--shadow-md);
  text-align: center;
}

.reveal {
  animation: fade-up 620ms ease both;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 960px) {
  .home-hero,
  .split-section,
  .footer-row,
  .works-grid,
  .status-grid,
  .info-grid,
  .card-grid,
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}

@media (max-width: 768px) {
  .site-shell {
    width: min(var(--content-width), calc(100% - 32px));
  }

  .desktop-nav {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .mobile-nav[data-open="true"] {
    display: block;
  }

  .section {
    margin-top: 64px;
  }

  .section-surface,
  .works-feature,
  .card,
  .work-card,
  .gallery-card,
  .timeline-item,
  .status-card {
    padding: 20px;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 320px;
  }

  .footer-row {
    padding: 24px 0 40px;
  }

  .footer-nav,
  .footer-links {
    flex-wrap: wrap;
    gap: 12px 20px;
  }
}