:root {
  --archive-bg: #07111f;
  --archive-panel: #0d1b2a;
  --archive-text: #f4f7fb;
  --archive-muted: #91a9c2;
  --archive-cyan: #49b7ff;
  --archive-yellow: #ffd166;
  --archive-line: rgba(153, 180, 209, .2);
  --archive-line-strong: rgba(153, 180, 209, .38);
  --archive-shell-height: 72px;
  --archive-radius-sm: 10px;
  --archive-radius-md: 18px;
  --archive-content: 1480px;
  --archive-editorial: 860px;
}

.archive-shell,
.archive-shell * {
  box-sizing: border-box;
}

.archive-shell {
  position: sticky;
  z-index: 900;
  top: 0;
  min-height: var(--archive-shell-height);
  padding: 10px max(20px, calc((100vw - var(--archive-content)) / 2));
  display: grid;
  grid-template-columns: minmax(230px, auto) minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
  border-bottom: 1px solid var(--archive-line);
  background: rgba(3, 9, 18, .94);
  backdrop-filter: blur(20px);
}

.archive-shell__brand {
  min-width: 0;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--archive-text);
  text-decoration: none;
}

.archive-shell__mark {
  flex: 0 0 auto;
  padding: 8px 9px;
  border-radius: 8px;
  color: var(--archive-bg);
  background: var(--archive-cyan);
  font: 950 13px/1 ui-sans-serif, system-ui, sans-serif;
  letter-spacing: .06em;
}

.archive-shell__identity {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.archive-shell__identity strong {
  overflow: hidden;
  font: 600 16px/1.1 Georgia, "Times New Roman", serif;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.archive-shell__identity small {
  margin-top: 4px;
  color: var(--archive-muted);
  font: 850 9px/1.2 ui-sans-serif, system-ui, sans-serif;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.archive-nav {
  min-width: 0;
  justify-self: end;
  display: flex;
  align-items: center;
  gap: clamp(13px, 1.6vw, 26px);
}

.archive-nav a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  color: var(--archive-muted);
  font: 850 10px/1 ui-sans-serif, system-ui, sans-serif;
  letter-spacing: .1em;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}

.archive-nav a:hover,
.archive-nav a[aria-current="page"] {
  color: var(--archive-text);
  border-bottom-color: var(--archive-cyan);
}

.archive-shell__utility,
.archive-menu-button {
  min-height: 44px;
  border: 1px solid var(--archive-line);
  border-radius: var(--archive-radius-sm);
  color: var(--archive-text);
  background: rgba(13, 27, 42, .72);
  font: 850 10px/1 ui-sans-serif, system-ui, sans-serif;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.archive-shell__utility {
  padding: 0 15px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

.archive-menu-button {
  display: none;
  padding: 0 13px;
  align-items: center;
  gap: 9px;
  cursor: pointer;
}

.archive-menu-button__glyph {
  width: 16px;
  display: grid;
  gap: 3px;
}

.archive-menu-button__glyph::before,
.archive-menu-button__glyph::after,
.archive-menu-button__glyph span {
  content: "";
  width: 100%;
  height: 1px;
  display: block;
  background: currentColor;
  transition: transform .16s ease, opacity .16s ease;
}

.archive-menu-button[aria-expanded="true"] .archive-menu-button__glyph::before {
  transform: translateY(4px) rotate(45deg);
}

.archive-menu-button[aria-expanded="true"] .archive-menu-button__glyph span {
  opacity: 0;
}

.archive-menu-button[aria-expanded="true"] .archive-menu-button__glyph::after {
  transform: translateY(-4px) rotate(-45deg);
}

.archive-shell a:focus-visible,
.archive-shell button:focus-visible,
.archive-action:focus-visible,
.archive-credit-strip a:focus-visible {
  outline: 3px solid var(--archive-yellow);
  outline-offset: 3px;
}

/* Shared action levels for later archive phases. */
.archive-action {
  min-height: 46px;
  padding: 0 17px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border: 1px solid var(--archive-line);
  border-radius: var(--archive-radius-sm);
  font-weight: 850;
  text-decoration: none;
}

.archive-action--primary { color: #07111f; background: var(--archive-yellow); border-color: var(--archive-yellow); }
.archive-action--secondary { color: var(--archive-text); background: rgba(13, 27, 42, .7); }
.archive-action--utility { min-height: 40px; color: var(--archive-muted); background: transparent; font-size: 12px; }

/* Shared technical metadata and restrained publication credit language. */
.archive-metadata {
  margin: 0;
  border-top: 1px solid var(--archive-line);
}

.archive-metadata > div {
  padding: 12px 0;
  display: grid;
  grid-template-columns: minmax(120px, .32fr) minmax(0, 1fr);
  gap: 20px;
  border-bottom: 1px solid var(--archive-line);
}

.archive-metadata dt {
  color: var(--archive-cyan);
  font: 900 10px/1.4 ui-sans-serif, system-ui, sans-serif;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.archive-metadata dd {
  margin: 0;
  color: var(--archive-text);
  line-height: 1.5;
}

.archive-credits {
  margin-top: 52px;
  padding: clamp(26px, 4vw, 44px);
  border-top: 1px solid var(--archive-line-strong);
  border-bottom: 1px solid var(--archive-line);
}

.archive-credits__label {
  margin: 0 0 18px;
  color: var(--archive-cyan);
  font: 900 10px/1.2 ui-sans-serif, system-ui, sans-serif;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.archive-credits__lead {
  display: grid;
  grid-template-columns: minmax(190px, .55fr) minmax(0, 1.45fr);
  gap: 28px;
}

.archive-credits__lead h2 {
  margin: 0;
  color: var(--archive-text);
  font: 500 clamp(30px, 3vw, 46px)/1 Georgia, "Times New Roman", serif;
}

.archive-credits__lead p {
  max-width: var(--archive-editorial);
  margin: 0;
  color: var(--archive-muted);
  line-height: 1.65;
}

.archive-credits__systems {
  margin-top: 30px;
  padding-top: 20px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  border-top: 1px solid var(--archive-line);
}

.archive-credits__systems span {
  color: var(--archive-muted);
  font-size: 12px;
  line-height: 1.5;
}

.archive-credits__systems strong { display: block; color: var(--archive-text); font-size: 13px; }

.archive-credit-strip {
  color: var(--archive-muted);
  font-size: 11px;
  line-height: 1.6;
}

.archive-credit-strip strong { color: var(--archive-text); }
.archive-credit-strip a { color: var(--archive-cyan); font-weight: 800; }

@media (max-width: 1040px) {
  .archive-shell { grid-template-columns: minmax(205px, auto) minmax(0, 1fr) auto; gap: 15px; }
  .archive-nav { gap: 12px; }
  .archive-nav a { font-size: 9px; letter-spacing: .07em; }
}

@media (max-width: 900px) {
  :root { --archive-shell-height: 64px; }

  .archive-shell {
    min-height: var(--archive-shell-height);
    padding: 9px 12px;
    grid-template-columns: minmax(0, 1fr) auto auto;
    gap: 8px;
  }

  .archive-shell__identity strong { font-size: 15px; }
  .archive-shell__identity small { font-size: 8px; }
  .archive-shell__utility { min-width: 44px; padding-inline: 11px; }
  .archive-shell__utility span { display: none; }
  .archive-shell.is-enhanced .archive-menu-button { display: inline-flex; }

  .archive-nav {
    grid-column: 1 / -1;
    justify-self: stretch;
    margin: 1px -12px -9px;
    padding: 10px 12px 13px;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2px 12px;
    border-top: 1px solid var(--archive-line);
    background: #030912;
  }

  .archive-shell.is-enhanced .archive-nav:not(.is-open) { display: none; }
  .archive-nav a { padding-inline: 8px; font-size: 10px; }

  .archive-credits__lead { grid-template-columns: 1fr; }
  .archive-credits__systems { grid-template-columns: 1fr; }
}

@media (max-width: 430px) {
  .archive-shell__archive-word { display: none; }
  .archive-shell__identity small { display: none; }
  .archive-menu-button { padding-inline: 10px; }
  .archive-menu-button > span:first-child { font-size: 9px; }
  .archive-metadata > div { grid-template-columns: 1fr; gap: 4px; }
}

@media screen and (orientation: landscape) and (min-width: 600px) and (max-width: 900px) and (max-height: 500px) {
  .archive-nav { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (prefers-reduced-motion: reduce) {
  .archive-shell *, .archive-shell *::before, .archive-shell *::after { transition-duration: .01ms !important; }
}

@media print {
  .archive-shell, .archive-menu-button { display: none !important; }
  .archive-credits { break-inside: avoid; color: #111; border-color: #999; }
}