:root {
  --brand-paper: #fafaf9;
  --brand-surface: #ffffff;
  --brand-ink: #111313;
  --brand-ink-soft: #4d5254;
  --brand-muted: #74797b;
  --brand-rule: #dedfdd;
  --brand-signal: #315d72;
  --brand-signal-soft: #edf3f5;
  --brand-night: #06090d;
  --brand-night-surface: #0b1118;
  --brand-night-rule: #1e2a35;
  --brand-night-ink: #e9edf0;
  --brand-night-soft: #b5c0c9;
  --brand-night-muted: #788693;
  --brand-night-signal: #62a5ce;
  --brand-amber: #f0a33a;
  --brand-serif: "Iowan Old Style", "Palatino Linotype", Palatino, Baskerville, Georgia, serif;
  --brand-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --brand-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --brand-max: 1160px;
  --brand-gutter: clamp(20px, 4vw, 56px);
}

body.brand-unified {
  font-family: var(--brand-sans);
}

.brandbar {
  position: sticky;
  top: 0;
  z-index: 60;
  width: 100%;
  border-bottom: 1px solid var(--brand-rule);
  background: color-mix(in srgb, var(--brand-paper) 91%, transparent);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.brandbar-inner {
  width: min(100%, var(--brand-max));
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin: 0 auto;
  padding-inline: var(--brand-gutter);
}

.brand-wordmark {
  min-width: 0;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--brand-ink);
  font-family: var(--brand-sans);
  font-size: 13px;
  font-weight: 680;
  letter-spacing: -.01em;
  text-decoration: none;
  white-space: nowrap;
}

.brand-mark {
  width: 9px;
  height: 9px;
  flex: 0 0 auto;
  display: block;
  border: 0;
  border-radius: 0;
  color: transparent;
  background: var(--brand-signal);
  box-shadow: 4px 4px 0 var(--brand-signal-soft);
}

.brand-context {
  color: var(--brand-muted);
  font-weight: 420;
}

.brandbar-main {
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand-surface-nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand-surface-nav a {
  position: relative;
  padding: 6px 0;
  color: var(--brand-muted);
  font-family: var(--brand-sans);
  font-size: 12px;
  line-height: 1;
  text-decoration: none;
}

.brand-surface-nav a:hover,
.brand-surface-nav a[aria-current="page"] {
  color: var(--brand-ink);
}

.brand-surface-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 1px;
  background: var(--brand-signal);
}

.brand-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand-status {
  color: var(--brand-muted);
  font-family: var(--brand-mono);
  font-size: 9px;
  letter-spacing: .09em;
  text-transform: uppercase;
  white-space: nowrap;
}

.brand-status::before {
  content: "";
  width: 5px;
  height: 5px;
  display: inline-block;
  margin: 0 7px 1px 0;
  border-radius: 50%;
  background: var(--brand-signal);
}

.brand-language {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  color: var(--brand-muted);
  font-family: var(--brand-mono);
  font-size: 10px;
  letter-spacing: .04em;
}

.brand-language button {
  border: 0;
  border-bottom: 1px solid transparent;
  padding: 5px 4px 3px;
  color: inherit;
  background: none;
  font: inherit;
  line-height: 1;
  cursor: pointer;
}

.brand-language button:hover,
.brand-language button[aria-pressed="true"] {
  color: var(--brand-ink);
}

.brand-language button[aria-pressed="true"] {
  border-color: var(--brand-ink);
}

.brand-footer {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--brand-rule);
  color: var(--brand-muted);
  background: var(--brand-paper);
  font-family: var(--brand-sans);
  letter-spacing: 0;
}

.brand-footer-inner {
  width: min(100%, var(--brand-max));
  min-height: 112px;
  display: grid;
  grid-template-columns: minmax(230px, 1fr) auto auto;
  gap: 32px;
  align-items: center;
  margin: 0 auto;
  padding: 26px var(--brand-gutter);
}

.brand-footer-identity strong {
  display: block;
  color: var(--brand-ink);
  font-family: var(--brand-serif);
  font-size: 20px;
  font-weight: 400;
}

.brand-footer-identity span {
  color: var(--brand-muted);
  font-family: var(--brand-mono);
  font-size: 9px;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.brand-footer-identity p {
  max-width: 58ch;
  margin: 8px 0 0;
  color: var(--brand-muted);
  font-family: var(--brand-sans);
  font-size: 12px;
  line-height: 1.55;
}

.brand-footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px 18px;
}

.brand-footer-nav a {
  color: var(--brand-ink-soft);
  font-family: var(--brand-sans);
  font-size: 12px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.brand-footer-nav a:hover { color: var(--brand-ink); border-color: var(--brand-rule); }

.brand-footer-meta {
  color: var(--brand-muted);
  font-family: var(--brand-mono);
  font-size: 9px;
  letter-spacing: .06em;
  text-align: right;
  text-transform: uppercase;
  white-space: nowrap;
}

body.brand-dark {
  --brand-paper: #06090d;
  --brand-surface: #0b1118;
  --brand-ink: #e9edf0;
  --brand-ink-soft: #b5c0c9;
  --brand-muted: #788693;
  --brand-rule: #1e2a35;
  --brand-signal: #62a5ce;
  --brand-signal-soft: #142733;
  --display: var(--brand-serif);
  --body: var(--brand-sans);
  --mono: var(--brand-mono);
}

.brandbar--dark {
  border-color: rgba(98, 165, 206, .18);
  background: rgba(6, 9, 13, .9);
}

.brandbar--dark .brand-mark {
  background: var(--brand-night-signal);
  box-shadow: 4px 4px 0 rgba(98, 165, 206, .15);
}

.brandbar--dark .brand-status::before {
  background: var(--brand-amber);
  box-shadow: 0 0 12px rgba(240, 163, 58, .55);
}

.brand-footer--dark {
  border-color: var(--brand-night-rule);
  color: var(--brand-night-muted);
  background: var(--brand-night);
}

.brand-footer--dark .brand-footer-identity strong { color: var(--brand-night-ink); }
.brand-footer--dark .brand-footer-nav a { color: var(--brand-night-soft); }
.brand-footer--dark .brand-footer-nav a:hover { color: var(--brand-night-ink); }

body.brand-dark h1,
body.brand-dark section h2,
body.brand-dark .footer-grid strong {
  font-family: var(--brand-serif);
  font-weight: 400;
}

body.brand-dark .brief-card h3,
body.brand-dark .limits-card h3,
body.brand-dark .metric-card h3 {
  font-family: var(--brand-sans);
}

body.brand-unified header.hero > .lang-toggle { display: none; }

@media (max-width: 880px) {
  .brand-context { display: none; }
  .brand-surface-nav { gap: 14px; }
  .brand-status { display: none; }
  .brand-footer-inner { grid-template-columns: 1fr auto; }
  .brand-footer-meta { display: none; }
}

@media (max-width: 640px) {
  .brandbar-inner { min-height: 64px; gap: 12px; }
  .brand-surface-nav { display: none; }
  .brandbar-main { gap: 10px; }
  .brand-wordmark { font-size: 12px; }
  .brand-actions { gap: 8px; }
  .brand-footer-inner { min-height: 0; grid-template-columns: 1fr; gap: 18px; padding-block: 30px; }
  .brand-footer-nav { justify-content: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  .brandbar *, .brand-footer * { transition: none !important; }
}