/* ==========================================================================
   Chrome: brand lockup, header, navigation, mobile menu, footer, proposal switch
   ========================================================================== */

/* --- Brand lockup -------------------------------------------------------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--fg);
  text-decoration: none;
}

.brand__mark {
  width: 2.5rem;
  height: auto;
  flex: none;
}

.mark-t { fill: var(--mark-1); }
.mark-o { fill: var(--mark-2); }
.mark-d { fill: var(--mark-3); }

.brand__word {
  display: flex;
  flex-direction: column;
  font-family: var(--font-brand);
  line-height: 1;
  text-transform: uppercase;
}

.brand__name {
  font-size: 1.04rem;
  font-weight: 700;
  letter-spacing: 0.075em;
}

.brand__sub {
  margin-top: 0.36rem;
  font-size: 0.54rem;
  font-weight: 600;
  letter-spacing: 0.52em;
  color: var(--fg-muted);
}

/* --- Header & navigation ------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg);
  background-color: color-mix(in srgb, var(--bg) 90%, transparent);
  -webkit-backdrop-filter: saturate(1.3) blur(14px);
  backdrop-filter: saturate(1.3) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease-out);
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
}

.scroll-sentinel {
  position: absolute;
  top: 0;
  left: 0;
  width: 1px;
  height: 8px;
  pointer-events: none;
}

.site-header__inner {
  min-height: var(--header-h);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 2rem;
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem clamp(1.25rem, 0.4rem + 1.9vw, 2.6rem);
}

.site-nav a {
  position: relative;
  display: inline-block;
  padding-block: 0.5rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--fg);
  text-decoration: none;
}

.site-nav a::after {
  content: "";
  position: absolute;
  inset: auto 0 0.2rem;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--dur) var(--ease-out);
}

.site-nav a:hover::after,
.site-nav a[aria-current="page"]::after {
  transform: scaleX(1);
  transform-origin: left;
}

.site-nav a[aria-current="page"] {
  color: var(--accent);
}

.site-nav .site-nav__cta {
  padding: 0.7rem 1.15rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-btn);
  transition: background-color var(--dur) var(--ease-out), color var(--dur), border-color var(--dur);
}

.site-nav .site-nav__cta::after {
  display: none;
}

.site-nav .site-nav__cta:hover,
.site-nav .site-nav__cta[aria-current="page"] {
  background: var(--btn-bg);
  border-color: var(--btn-bg);
  color: var(--btn-fg);
}

.menu-toggle {
  display: none;
  align-items: center;
  gap: 0.7rem;
  min-height: 2.75rem;
  padding: 0.5rem 0;
  background: none;
  border: 0;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg);
  cursor: pointer;
}

.menu-toggle__icon {
  position: relative;
  width: 1.6rem;
  height: 0.6rem;
}

.menu-toggle__icon::before,
.menu-toggle__icon::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1.5px;
  background: currentColor;
  transition: transform var(--dur) var(--ease-out), top var(--dur) var(--ease-out);
}

.menu-toggle__icon::before { top: 0; }
.menu-toggle__icon::after { top: calc(100% - 1.5px); }

.menu-toggle[aria-expanded="true"] .menu-toggle__icon::before {
  top: calc(50% - 0.75px);
  transform: rotate(35deg);
}

.menu-toggle[aria-expanded="true"] .menu-toggle__icon::after {
  top: calc(50% - 0.75px);
  transform: rotate(-35deg);
}

@media (max-width: 55.99em) {
  .js .site-nav { display: none; }
  .js .menu-toggle { display: inline-flex; }
}

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 2.5rem;
  padding: calc(var(--header-h) + 1.5rem) var(--gutter) 2rem;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.mobile-menu[hidden] {
  display: none;
}

.mobile-menu__list a {
  display: flex;
  align-items: baseline;
  gap: 1.1rem;
  padding-block: 0.95rem;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-display);
  font-size: calc(2.35rem * var(--display-scale));
  font-weight: var(--display-weight);
  letter-spacing: var(--display-tracking);
  line-height: 1.1;
  text-decoration: none;
}

.mobile-menu__list a[aria-current="page"] {
  color: var(--accent);
}

.mobile-menu__list span {
  font-family: var(--font-body);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--accent);
}

.mobile-menu__meta {
  font-size: var(--step--1);
  color: var(--fg-muted);
}

html.menu-open {
  overflow: hidden;
}

/* --- Footer --------------------------------------------------------------- */
[data-tone="footer"] {
  --bg: var(--inv-bg);
  --bg-alt: var(--inv-bg-alt);
  --fg: var(--inv-fg);
  --fg-muted: var(--inv-fg-muted);
  --line: var(--inv-line);
  --line-strong: var(--inv-line-strong);
  --accent: var(--inv-accent);
  --gold: var(--inv-gold);
  --gold-line: var(--inv-gold-line);
  --em: var(--inv-em);
  --mark-1: var(--inv-mark-1);
  --mark-2: var(--inv-mark-2);
  --mark-3: var(--inv-mark-3);
  background-color: var(--bg);
  color: var(--fg);
}

html[data-direction="noir"] [data-tone="footer"] {
  --bg: #0a1d25;
  --bg-alt: #0f2630;
  --fg: #f1ede4;
  --fg-muted: rgba(241, 237, 228, 0.68);
  --line: rgba(241, 237, 228, 0.12);
  --line-strong: rgba(241, 237, 228, 0.3);
  --accent: var(--yr-ochre);
  --gold: var(--yr-ochre);
  --gold-line: var(--yr-ochre);
  --em: var(--yr-ochre);
  --mark-3: #2c8c84;
}

.site-footer {
  padding: clamp(4rem, 3rem + 4vw, 7rem) 0 2rem;
}

.site-footer a {
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

.site-footer__top {
  display: grid;
  gap: 2.25rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--line);
}

.site-footer__statement {
  font-size: calc(var(--step-4) * var(--display-scale));
  max-width: 14em;
}

.site-footer__cols {
  display: grid;
  gap: 2.25rem;
  padding-block: 3rem;
  font-size: 0.9375rem;
}

.site-footer__cols li + li {
  margin-top: 0.45rem;
}

.site-footer__h {
  margin-bottom: 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.site-footer__legal {
  color: var(--fg-muted);
  font-size: var(--step--1);
  line-height: 1.6;
}

.site-footer__base {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  font-size: var(--step--1);
  color: var(--fg-muted);
}

@media (min-width: 40em) {
  .site-footer__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 64em) {
  .site-footer__top { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); align-items: end; }
  .site-footer__statement { justify-self: end; text-align: right; }
  .site-footer__cols { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* --- Proposal direction switch (preview only; removed at launch) ---------- */
.proposal-switch {
  position: fixed;
  z-index: 150;
  left: 50%;
  bottom: max(0.9rem, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 0.2rem;
  padding: 0.3rem;
  background: rgba(255, 255, 255, 0.94);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(25, 55, 67, 0.18);
  border-radius: 999px;
  box-shadow: 0 12px 32px rgba(15, 38, 48, 0.2);
  font: 600 0.8125rem/1 "Inter", system-ui, sans-serif;
  letter-spacing: 0;
  color: #193743;
  white-space: nowrap;
}

.proposal-switch__label {
  padding: 0 0.6rem 0 0.85rem;
  font-size: 0.625rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #4e636b;
}

.proposal-switch button {
  padding: 0.6rem 0.95rem;
  background: transparent;
  border: 0;
  border-radius: 999px;
  color: #193743;
  cursor: pointer;
  transition: background-color 160ms ease, color 160ms ease;
}

.proposal-switch button:hover {
  background: rgba(25, 55, 67, 0.08);
}

.proposal-switch button[aria-pressed="true"] {
  background: #193743;
  color: #f7f5f0;
}

.proposal-switch button:focus-visible {
  outline: 2px solid #126d68;
  outline-offset: 2px;
}

.proposal-switch__key {
  margin-right: 0.4rem;
  opacity: 0.55;
}

@media (max-width: 30em) {
  .proposal-switch__label { display: none; }
  .proposal-switch button { padding: 0.6rem 0.75rem; }
}