.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(245,247,251,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
body[data-theme="dark"] .site-header {
  background: rgba(16,26,45,0.85);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 78px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--text);
  font-weight: 800;
}
.brand-mark {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--navy), #2d63b8);
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 0.78rem;
  box-shadow: var(--shadow);
}
.brand-copy strong {
  display: block;
  font-size: 1.05rem;
}
.brand-copy small {
  display: block;
  color: var(--text-soft);
  font-size: 0.72rem;
  font-weight: 600;
}
.brand-copy strong span {
  color: var(--saffron);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.main-nav a {
  color: var(--text-soft);
  font-weight: 600;
}
.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--navy);
}
.header-tools {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}
.theme-toggle {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  border-radius: 10px;
  width: 44px;
  height: 44px;
  cursor: pointer;
}
.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  border-radius: 10px;
  cursor: pointer;
}
.hero {
  padding: clamp(2.25rem, 4vw, 4rem) 0;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 1.2rem;
  align-items: center;
}
.hero-copy {
  padding: 1rem 0;
}
.hero-copy h1 {
  margin: 0 0 1rem;
  font-size: clamp(2.3rem, 5vw, 4.1rem);
  line-height: 1.06;
  letter-spacing: -0.05em;
}
.hero-copy h1 span {
  color: var(--text-soft);
}
.hero-copy p {
  margin: 0 0 1.4rem;
  color: var(--text-soft);
  font-size: 1.06rem;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.2rem;
}
.hero-note {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem;
  box-shadow: var(--shadow);
}
.notice-box {
  border-left: 4px solid var(--saffron);
  background: var(--saffron-soft);
  border-radius: var(--radius-sm);
  padding: 1rem;
  color: var(--text);
}
.search-box {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 0.75rem;
  padding: 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}
.search-box input, .search-box select {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface-muted);
  color: var(--text);
  padding: 0.8rem 0.9rem;
}
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1rem;
}
.filter-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0.55rem 0.8rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text-soft);
  font-weight: 600;
}
.filter-chip.active {
  background: var(--green-soft);
  border-color: rgba(27,127,90,0.25);
  color: var(--green);
}
.section-block {
  padding: 2.4rem 0;
}
.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}
.section-head p {
  margin: 0;
  color: var(--text-soft);
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}
.update-card, .tool-card, .source-card, .guide-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.15rem;
}
.update-card .meta, .source-card .meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  color: var(--text-soft);
  font-size: 0.8rem;
  margin-bottom: 0.75rem;
}
.update-card h3, .tool-card h3, .source-card h3, .guide-card h3 {
  margin: 0 0 0.6rem;
  font-size: 1.12rem;
}
.update-card p, .tool-card p, .guide-card p {
  margin: 0 0 0.8rem;
  color: var(--text-soft);
}
.card-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem;
  margin-top: 1rem;
}
.inline-link {
  color: var(--navy);
  font-weight: 700;
}
.source-card ul {
  list-style: none;
  margin: 0.8rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}
.source-card li {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  border-top: 1px solid var(--line);
  padding-top: 0.5rem;
}
.source-card li:first-child {
  border-top: none;
  padding-top: 0;
}
.source-card li a {
  color: var(--navy);
  font-weight: 600;
}
.notice-list {
  display: grid;
  gap: 1rem;
  padding: 0;
  list-style: none;
  margin: 1rem 0 0;
}
.notice-list li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 0.8rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--shadow);
}
.notice-step {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--green-soft);
  color: var(--green);
  display: grid;
  place-items: center;
  font-weight: 800;
}
.footer {
  background: #0f1b2e;
  color: rgba(255,255,255,0.8);
  padding: 2.5rem 0 1.5rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 1.2rem;
}
.footer-nav {
  display: grid;
  gap: 0.6rem;
}
.footer-nav a {
  color: rgba(255,255,255,0.8);
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.9rem;
  margin-top: 1.4rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255,255,255,0.12);
}
.cookie-banner {
  position: fixed;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  z-index: 50;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem;
  display: none;
}
.cookie-banner.visible { display: block; }
.cookie-banner .actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}
@media (max-width: 900px) {
  .card-grid, .footer-grid, .hero-inner {
    grid-template-columns: 1fr;
  }
  .main-nav { display: none; }
  .menu-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .main-nav.open {
    position: absolute;
    left: 1rem;
    right: 1rem;
    top: calc(100% + 0.5rem);
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius); 
    display: grid;
    gap: 0.7rem;
    padding: 1rem;
    box-shadow: var(--shadow);
  }
  .search-box {
    grid-template-columns: 1fr;
  }
}