/* ==========================================================================
   REVERON EMPIRE — Base, layout, header, navigation, footer
   Mobile-first. Larger breakpoints live in responsive.css.
   ========================================================================== */

/* ---------- Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-h) + 1rem);
}

body {
  min-height: 100vh;
  background: var(--color-bg-dark);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg, canvas, video { display: block; max-width: 100%; }
img { height: auto; }
input, button, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.2em; }
:where(ul[class], ol[class], nav ul, nav ol) { list-style: none; padding: 0; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 700; line-height: var(--lh-heading); overflow-wrap: break-word; }
p { overflow-wrap: break-word; }
abbr[title] { text-decoration: none; }
[hidden] { display: none !important; }
main:focus { outline: none; }

/* ---------- Focus ---------- */
:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- Accessibility utilities ---------- */
.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 0.75rem; left: 0.75rem;
  z-index: var(--z-skip);
  padding: 0.75rem 1.25rem;
  background: var(--re-white);
  color: var(--re-graphite);
  font-weight: 600;
  border-radius: var(--radius-btn);
  transform: translateY(-200%);
  transition: transform var(--dur-micro) var(--ease-out);
}
.skip-link:focus { transform: translateY(0); }

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: calc(var(--container) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container--wide { max-width: calc(var(--container-wide) + 2 * var(--gutter)); }

.section { padding-block: var(--section-pad); position: relative; }

.theme-light,
.theme-ice,
.theme-dark {
  background-color: var(--section-bg);
  color: var(--section-text);
}

/* ---------- Typography ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--section-accent, var(--re-blue));
  margin-bottom: var(--space-5);
}
.eyebrow::before {
  content: "";
  width: 3px;
  height: 1.1em;
  background: currentColor;
}

.section-intro { max-width: 52rem; }

.section-title {
  font-size: var(--fs-h2);
  font-weight: 800;
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-display);
  text-transform: uppercase;
}

.line { display: block; }
.line--accent { color: var(--section-accent, var(--re-blue)); }
.line__inner { display: inline-block; }

.section-lead {
  margin-top: var(--space-5);
  max-width: 38rem;
  font-size: var(--fs-lg);
  line-height: 1.55;
  color: var(--section-muted);
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: var(--z-header);
  color: var(--re-white);
  background: rgba(11, 13, 16, 0.82);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--color-border-dark);
  transition: background-color var(--dur-ui) var(--ease-out), border-color var(--dur-ui) var(--ease-out), transform var(--dur-ui) var(--ease-out);
}

/* With JS: transparent over the hero until the page scrolls. */
.js .site-header:not(.is-scrolled):not(.is-menu-open) {
  background: transparent;
  border-bottom-color: transparent;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}
/* backdrop-filter would make the header the containing block of the fixed menu. */
.site-header.is-menu-open {
  background: var(--re-graphite);
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  height: var(--header-h);
  transition: height var(--dur-ui) var(--ease-out);
}
/* Scrolled: a compact dark surface. */
.js .site-header.is-scrolled .site-header__inner { height: 64px; }
.site-header .btn--primary { box-shadow: none; }
/* Steps out of the way while reading down; returns on the way up. */
.js .site-header.is-hidden:not(.is-menu-open):not(:focus-within) { transform: translateY(-100%); }

/* Route progress: the header's bottom edge is the page's route. */
.site-header__progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--dur-ui) ease;
}
.site-header.is-scrolled .site-header__progress { opacity: 1; }
.site-header__progress span {
  position: absolute;
  top: 0;
  left: 0;
  height: 1px;
  width: calc(var(--progress, 0) * 100%);
  background: var(--re-signal-blue);
}
.site-header__progress span::after {
  content: "";
  position: absolute;
  right: -3px;
  top: -3px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--re-signal-blue);
}

/* Brand (header). .brand__img is the official logo; .brand__mark/.brand__word are the text fallback. */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  flex-shrink: 0;
}
.brand__mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--color-border-dark-strong);
  border-radius: var(--radius-xs);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: -0.02em;
  background: linear-gradient(180deg, rgba(56, 160, 255, 0.12), rgba(18, 104, 243, 0));
  position: relative;
  overflow: hidden;
}
.brand__mark::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 2px;
  background: var(--re-gradient);
}
.brand__word { display: flex; flex-direction: column; line-height: 1; }
.brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  font-style: italic;
}
.brand__sub {
  margin-top: 0.3rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.56rem;
  letter-spacing: 0.62em;
  color: var(--re-signal-blue);
}
.brand__img { height: 36px; width: auto; }
@media (min-width: 1024px) { .brand__img { height: 42px; } }

/* Primary navigation (desktop — shown in responsive.css) */
.primary-nav { display: none; }
.primary-nav ul { display: flex; gap: clamp(1.25rem, 2.4vw, 2.5rem); }
.primary-nav a {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding-block: 0.5rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: none;
  color: rgba(250, 251, 253, 0.78);
  transition: color var(--dur-micro) ease;
}
.primary-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: var(--re-signal-blue);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-ui) var(--ease-out);
}
.primary-nav__num { font-family: var(--font-display); font-size: 0.6rem; font-weight: 700; letter-spacing: 0.06em; color: var(--re-steel); transition: color var(--dur-micro) ease; }
.primary-nav a:hover,
.primary-nav a[aria-current="page"] { color: var(--re-white); }
.primary-nav a:hover .primary-nav__num,
.primary-nav a[aria-current="page"] .primary-nav__num { color: var(--re-signal-blue); }
.primary-nav a:hover::after,
.primary-nav a[aria-current="page"]::after { transform: scaleX(1); }

/* No-JS fallback: the mobile menu cannot open, so show the nav inline. */
.no-js .primary-nav { display: block; order: 3; width: 100%; }
.no-js .site-header__inner { flex-wrap: wrap; height: auto; padding-block: 0.75rem; }
.no-js .primary-nav ul { flex-wrap: wrap; gap: 0.25rem 1.25rem; }
.no-js .menu-toggle { display: none; }

.site-header__actions { display: flex; align-items: center; gap: var(--space-4); }
.site-header .site-header__cta { display: none; }

/* Language switch */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
}
.lang-switch a {
  text-decoration: none;
  color: var(--section-muted, var(--re-steel));
  padding: 0.35rem 0.15rem;
  transition: color var(--dur-micro) ease;
}
.lang-switch a:hover,
.lang-switch a.is-active { color: var(--section-text, var(--re-white)); }
.lang-switch a.is-active { box-shadow: inset 0 -2px 0 var(--re-signal-blue); }
.lang-switch__sep { color: var(--color-border-dark-strong); }
.site-header .lang-switch a { color: rgba(250, 251, 253, 0.6); }
.site-header .lang-switch a:hover,
.site-header .lang-switch a.is-active { color: var(--re-white); }
.lang-switch--header { display: none; }

/* Menu toggle */
.menu-toggle {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-border-dark-strong);
  border-radius: var(--radius-btn);
  color: var(--re-white);
}
.menu-toggle__bars { position: relative; width: 18px; height: 10px; }
.menu-toggle__bars span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 1.5px;
  background: currentColor;
  transition: transform var(--dur-ui) var(--ease-out), top var(--dur-ui) var(--ease-out);
}
.menu-toggle__bars span:first-child { top: 0; }
.menu-toggle__bars span:last-child { top: 100%; }
.menu-toggle[aria-expanded="true"] .menu-toggle__bars span:first-child { top: 50%; transform: rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-toggle__bars span:last-child { top: 50%; transform: rotate(-45deg); }

/* Mobile menu */
.mobile-menu {
  position: fixed;
  inset: var(--header-h) 0 0;
  z-index: var(--z-menu);
  background: var(--re-graphite);
  color: var(--re-white);
  overflow-y: auto;
  overscroll-behavior: contain;
  opacity: 0;
  transition: opacity var(--dur-ui) var(--ease-out);
}
.mobile-menu.is-open { opacity: 1; }
.mobile-menu__inner {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 100%;
  padding-block: var(--space-7) var(--space-6);
  gap: var(--space-7);
}
.mobile-menu__list { position: relative; padding-left: 1.75rem; }
.mobile-menu__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 1.6rem;
  bottom: 1.6rem;
  width: 1px;
  background: var(--color-border-dark-strong);
}
.mobile-menu__list li {
  position: relative;
  border-bottom: 1px solid var(--color-border-dark);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--dur-ui) var(--ease-out), transform var(--dur-ui) var(--ease-out);
  transition-delay: calc(var(--i) * 50ms + 80ms);
}
.mobile-menu.is-open .mobile-menu__list li { opacity: 1; transform: none; }
.mobile-menu__list a {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding-block: 1.1rem;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 7vw, 2.75rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  text-decoration: none;
}
.mobile-menu__list li::before {
  content: "";
  position: absolute;
  left: calc(-1.75rem + 1px);
  top: 50%;
  width: 9px;
  height: 9px;
  margin-top: -4.5px;
  border: 1.5px solid var(--re-steel);
  border-radius: 50%;
  background: var(--re-graphite);
}
.mobile-menu__list li:has(a[aria-current="page"])::before { border-color: var(--re-signal-blue); background: var(--re-signal-blue); }
.mobile-menu__list a[aria-current="page"] { color: var(--re-signal-blue); }
.mobile-menu__num { min-width: 1.5rem; font-family: var(--font-body); font-size: var(--fs-xs); font-weight: 600; color: var(--re-steel); letter-spacing: 0.1em; }
.mobile-menu__footer { display: grid; gap: var(--space-5); justify-items: start; }
.mobile-menu__tagline { display: grid; gap: 0.35rem; font-family: var(--font-display); font-weight: 700; font-size: var(--fs-xs); letter-spacing: var(--tracking-label); color: var(--re-white); }
.mobile-menu__tagline span { font-family: var(--font-body); font-weight: 600; font-size: 0.6rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--re-steel); }

body.menu-open { overflow: hidden; }

/* ---------- Inner page hero ---------- */
.page-hero {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--header-h) + clamp(3rem, 8vw, 7rem));
  padding-bottom: clamp(3.5rem, 7vw, 6.5rem);
  isolation: isolate;
}
.page-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border-dark-strong), transparent);
}
.page-hero__bg { position: absolute; inset: 0; z-index: -1; opacity: 0.9; }
.page-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(60% 80% at 85% 20%, rgba(18, 104, 243, 0.22), transparent 70%),
    linear-gradient(90deg, var(--re-graphite) 10%, rgba(11, 13, 16, 0.4) 70%, rgba(11, 13, 16, 0.2));
}
.page-hero__title {
  font-size: clamp(2.6rem, 1.4rem + 5.6vw, 7rem);
  font-weight: 800;
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-display);
  text-transform: uppercase;
  max-width: 16ch;
}
.page-hero__lead {
  margin-top: var(--space-6);
  max-width: 36rem;
  font-size: var(--fs-lg);
  color: var(--re-steel);
}

/* Breadcrumbs */
.breadcrumbs { margin-bottom: var(--space-6); }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 0.5rem; font-size: var(--fs-xs); letter-spacing: 0.12em; text-transform: uppercase; color: var(--re-steel); }
.breadcrumbs li { display: inline-flex; align-items: center; gap: 0.5rem; }
.breadcrumbs li + li::before { content: ""; width: 14px; height: 1px; background: currentColor; opacity: 0.6; }
.breadcrumbs a { text-decoration: none; }
.breadcrumbs a:hover { color: var(--re-white); }
.breadcrumbs [aria-current] { color: var(--re-white); }

/* ---------- Footer: the end of the route ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  padding-top: clamp(4.5rem, 3rem + 6vw, 8rem);
  border-top: 1px solid var(--color-border-dark);
}
.site-footer__motif {
  position: absolute;
  z-index: -1;
  right: -0.06em;
  bottom: -0.24em;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(14rem, 44vw, 46rem);
  line-height: 1;
  letter-spacing: -0.06em;
  font-style: italic;
  color: rgba(140, 163, 199, 0.035);
  pointer-events: none;
  user-select: none;
}
.site-footer__statement { display: grid; gap: var(--space-7); align-items: end; }
.site-footer__big {
  font-family: var(--font-display);
  font-size: clamp(3.4rem, 0.8rem + 11vw, 11.5rem);
  font-weight: 800;
  line-height: 0.84;
  letter-spacing: -0.055em;
  text-transform: uppercase;
}
.site-footer__big .line { display: block; }
.site-footer__big .line:nth-child(2) { padding-left: 0.6em; color: var(--re-steel); }
.site-footer__big .line--accent { color: var(--re-signal-blue); }
.site-footer__brand { display: grid; gap: var(--space-5); justify-items: start; }
.site-footer__logo { text-decoration: none; }

/* Mile-marker rule */
.site-footer__rule { margin-block: clamp(3.5rem, 2rem + 4vw, 6rem) clamp(2.5rem, 1.5rem + 3vw, 4.5rem); }
.site-footer__rule span {
  display: block;
  height: 9px;
  border-top: 1px solid var(--color-border-dark-strong);
  background: repeating-linear-gradient(90deg, var(--color-border-dark-strong) 0 1px, transparent 1px 48px);
  -webkit-mask: linear-gradient(90deg, #000, rgba(0, 0, 0, 0.15));
  mask: linear-gradient(90deg, #000, rgba(0, 0, 0, 0.15));
}

.site-footer__top { display: grid; gap: var(--space-8); padding-bottom: var(--space-8); }
.site-footer__heading {
  display: flex;
  gap: 0.75rem;
  margin-bottom: var(--space-5);
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--re-steel);
}
.site-footer__heading span { font-family: var(--font-display); font-weight: 700; letter-spacing: 0.06em; color: var(--re-signal-blue); }
.site-footer__heading span::after { content: "/"; margin-left: 0.75rem; color: var(--color-border-dark-strong); }
.site-footer__index { display: grid; border-top: 1px solid var(--color-border-dark); }
.site-footer__index a {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  padding-block: 0.7rem;
  border-bottom: 1px solid var(--color-border-dark);
  text-decoration: none;
  color: rgba(250, 251, 253, 0.88);
  transition: color var(--dur-micro) ease, padding var(--dur-ui) var(--ease-out);
}
.site-footer__index a span { font-family: var(--font-display); font-size: 0.66rem; font-weight: 700; color: var(--re-steel); transition: color var(--dur-micro) ease; }
.site-footer__index a:hover { color: var(--re-white); padding-left: 0.4rem; }
.site-footer__index a:hover span { color: var(--re-signal-blue); }
.site-footer__directory { display: grid; border-top: 1px solid var(--color-border-dark); }
.site-footer__directory > div { display: grid; gap: 0.2rem; padding-block: 0.8rem; border-bottom: 1px solid var(--color-border-dark); }
.site-footer__directory dt { font-size: 0.62rem; font-weight: 600; letter-spacing: var(--tracking-label); text-transform: uppercase; color: var(--re-steel); }
.site-footer__directory dd { margin: 0; overflow-wrap: anywhere; }
.site-footer__directory a { text-decoration: none; }
.site-footer__directory a:hover { color: var(--re-signal-blue); }

.site-footer__bottom {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4) var(--space-6);
  padding-block: var(--space-6);
  font-size: var(--fs-sm);
  color: var(--re-steel);
}
.site-footer__bottom::before {
  content: "";
  position: absolute;
  top: 0;
  left: var(--gutter);
  right: var(--gutter);
  height: 1px;
  background: var(--color-border-dark);
}
.site-footer__legal { display: flex; flex-wrap: wrap; gap: var(--space-5); }
.site-footer__return {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--re-white);
}
.site-footer__return .icon { width: 16px; height: 16px; color: var(--re-signal-blue); transition: transform var(--dur-ui) var(--ease-out); }
.site-footer__return:hover .icon { transform: translateY(-4px); }

/* Footer lockup. .logo-full__img is the official logo; .logo-full__* spans are the text fallback. */
.logo-full { display: inline-flex; flex-direction: column; line-height: 1; }
.logo-full__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-style: italic;
  font-size: clamp(2rem, 1.5rem + 2vw, 2.75rem);
  letter-spacing: -0.01em;
}
.logo-full__sub {
  margin-top: 0.45rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.55em;
  color: var(--re-signal-blue);
}
.logo-full__sub small { font-size: 0.6rem; letter-spacing: 0.2em; color: var(--re-white); }
.logo-full__descriptor {
  margin-top: 0.85rem;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.62rem;
  letter-spacing: 0.32em;
  color: var(--re-steel);
}
.logo-full__img { width: clamp(260px, 24vw, 380px); height: auto; }

/* Contact list (footer, forms aside) */
.contact-list { display: grid; gap: 0.85rem; }
.contact-list li { display: flex; align-items: flex-start; gap: 0.75rem; }
.contact-list .icon { flex-shrink: 0; width: 18px; height: 18px; margin-top: 0.2em; color: var(--re-signal-blue); }
.contact-list a { text-decoration: none; }
.contact-list a:hover { color: var(--re-signal-blue); }

.social-list { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; margin-top: var(--space-5); font-size: var(--fs-sm); }

/* ---------- Development helpers ---------- */
.pending {
  display: inline-block;
  padding: 0.1em 0.45em;
  border: 1px dashed var(--color-warning);
  border-radius: var(--radius-xs);
  background: var(--color-warning-bg);
  color: var(--color-warning);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.8em;
  letter-spacing: 0.02em;
  line-height: 1.4;
  white-space: nowrap;
}
.theme-light .pending,
.theme-ice .pending { color: #8A5A00; border-color: #C98A0B; }
.theme-light .theme-dark .pending { color: var(--color-warning); border-color: var(--color-warning); }

.dev-badge {
  position: fixed;
  left: 0.75rem;
  bottom: 0.75rem;
  z-index: var(--z-rail);
  max-width: min(28rem, calc(100vw - 1.5rem));
  padding: 0.4rem 0.7rem;
  border: 1px dashed var(--color-warning);
  border-radius: var(--radius-xs);
  background: rgba(11, 13, 16, 0.92);
  color: var(--color-warning);
  font-size: 0.68rem;
  line-height: 1.4;
  pointer-events: none;
}