/* Distinctive, restrained site chrome. One shared treatment across every published page.
   Scope C: presentation craft, no page redesign or new frontend runtime. */

.site-header {
  position: sticky;
  top: 0;
  isolation: isolate;
  background: color-mix(in srgb, var(--bg) 88%, white);
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 22%, var(--line));
  box-shadow: 0 10px 32px rgba(21, 47, 43, .065);
  backdrop-filter: blur(18px) saturate(1.1);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-strong) 0%, var(--accent) 54%, var(--accent-warm) 100%);
}

.site-header .header-inner {
  min-height: 84px;
  gap: clamp(1.25rem, 3vw, 2.5rem);
}

.site-header .brand {
  gap: .9rem;
}

.site-header .brand-mark-image {
  width: 2rem;
  height: 2rem;
  padding: .25rem;
  border-radius: .65rem;
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--line));
  background: rgba(255, 255, 255, .88);
  box-shadow: 0 7px 22px rgba(27, 58, 53, .10);
}

.site-header .brand-title {
  font-size: clamp(1.05rem, 1rem + .2vw, 1.18rem);
  letter-spacing: -.04em;
}

.site-header .brand-subtitle {
  display: inline-block;
  margin-top: .12rem;
  font-size: .71rem;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.site-header .nav-list {
  gap: .4rem;
}

.site-header .nav-list a {
  position: relative;
  padding: .65rem .95rem;
  border-radius: .65rem;
  font-weight: 600;
  transition: color .18s ease, background-color .18s ease, border-color .18s ease, box-shadow .18s ease;
}

.site-header .nav-list a:hover,
.site-header .nav-list a:focus-visible {
  color: var(--accent-strong);
  border-color: color-mix(in srgb, var(--accent) 28%, var(--line));
  background: rgba(255, 255, 255, .92);
}

.site-header .nav-list a[aria-current="page"] {
  color: #fff;
  background: var(--accent-strong);
  border-color: var(--accent-strong);
  box-shadow: 0 7px 20px rgba(23, 63, 67, .17);
}

.site-header .nav-list a[aria-current="page"]:focus-visible {
  outline-color: var(--accent-warm);
  outline-offset: 3px;
}

.footer {
  position: relative;
  overflow: clip;
  margin-top: clamp(2.5rem, 6vw, 5rem);
  padding: clamp(3rem, 6vw, 4.75rem) 0 clamp(3.25rem, 6vw, 5rem);
  border-top: 1px solid color-mix(in srgb, var(--accent) 28%, var(--line));
  background: linear-gradient(125deg, #e4eee8 0%, #f0f5ef 50%, #e6ede8 100%);
}

.footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-warm) 0%, var(--accent) 46%, transparent 93%);
}

.footer-inner {
  grid-template-columns: minmax(0, 1.12fr) minmax(0, 1.12fr) minmax(0, .75fr);
  gap: clamp(2rem, 4vw, 3.8rem);
  align-items: start;
}

.footer .footer-brand {
  border-left: 3px solid var(--accent);
  padding-left: clamp(1rem, 2vw, 1.4rem);
}

.footer .footer-brand > .brand {
  margin-bottom: 1.1rem;
}

.footer .footer-brand .brand-mark-image {
  width: 1.8rem;
  height: 1.8rem;
}

.footer .footer-brand p {
  max-width: 27ch;
  line-height: 1.7;
}

.footer .footer-social {
  gap: .55rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.footer .footer-icon-link {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: .7rem;
  border-color: color-mix(in srgb, var(--accent) 27%, var(--line));
  background: rgba(255, 255, 255, .76);
}

.footer .footer-icon-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 7px 20px rgba(23, 63, 67, .11);
}

.footer .footer-project-link img.footer-icon {
  width: 1.35rem;
  height: 1.35rem;
  object-fit: contain;
  border-radius: .24rem;
}

.footer .footer-nav {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.25rem, 2.2vw, 2.25rem);
}

.footer .footer-nav-title,
.footer .footer-note-title {
  color: var(--accent-strong);
  font-size: .73rem;
  font-weight: 750;
  letter-spacing: .12em;
  margin-bottom: .9rem;
}

.footer .footer-links {
  gap: .55rem;
}

.footer .footer-links a {
  font-weight: 550;
}

.footer .footer-note {
  max-width: none;
  text-align: left;
  justify-self: stretch;
  padding: .25rem 0 0 1.2rem;
  border-left: 1px solid color-mix(in srgb, var(--accent) 25%, var(--line));
}

.footer .footer-note-small {
  margin-top: 1.35rem !important;
  max-width: 26ch;
  font-size: .8rem;
}

@media (max-width: 1080px) {
  .footer-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  }

  .footer .footer-note {
    grid-column: 1 / -1;
    border-left: 0;
    border-top: 1px solid color-mix(in srgb, var(--accent) 20%, var(--line));
    padding: 1.25rem 0 0;
  }
}

@media (max-width: 900px) {
  .site-header .header-inner { min-height: 76px; }
  .site-header .nav-toggle {
    border-radius: .7rem;
    color: var(--accent-strong);
    border-color: color-mix(in srgb, var(--accent) 25%, var(--line));
    background: rgba(255, 255, 255, .92);
  }

  .site-header .nav-list {
    top: 76px;
    gap: .25rem;
    padding: .75rem;
    border-radius: 1rem;
    border-color: color-mix(in srgb, var(--accent) 26%, var(--line));
    box-shadow: 0 22px 50px rgba(23, 63, 67, .15);
  }

  .site-header .nav-list a { width: 100%; }
}

@media (max-width: 720px) {
  .site-header .header-inner { min-height: 70px; }
  .site-header .brand-title { font-size: 1rem; }
  .site-header .brand-subtitle { display: none; }
  .site-header .nav-list { top: 70px; }

  .footer { padding-top: 2.7rem; }
  .footer-inner { grid-template-columns: minmax(0, 1fr); gap: 2rem; }
  .footer .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer .footer-note { grid-column: auto; }
  .footer .footer-brand { padding-left: 1rem; }
}

@media (max-width: 460px) {
  .footer .footer-nav { gap: 1.25rem; }
  .footer .footer-links a { font-size: .88rem; }
}

@media (prefers-reduced-motion: reduce) {
  .site-header .nav-list a,
  .footer .footer-icon-link {
    transition: none;
  }
}