/* ==========================================================================
   PHOENIX MRO — Core styles: base, type, buttons, header, opening film.
   Sections below the film live in sections.css
   ========================================================================== */

/* ---------------------------------------------------------------- Base */
html { background: var(--c-bg); scroll-behavior: smooth; }

body {
  font-family: var(--f-body);
  font-size: var(--fs-base);
  color: var(--c-text);
  background: var(--c-bg);
  overflow-x: hidden;
}

html.menu-open, html.menu-open body { overflow: hidden; }

::selection { background: var(--c-accent); color: var(--c-bg); }

:focus-visible {
  outline: 2px solid var(--c-blue);
  outline-offset: 3px;
}

.container {
  width: min(100% - 2 * var(--gutter), var(--container));
  margin-inline: auto;
}
.container > *, [class*='__grid'] > * { min-width: 0; }

.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;
}

.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

.skip-link {
  position: fixed; top: 12px; left: 12px; z-index: 100;
  padding: 12px 18px;
  background: var(--c-accent); color: var(--c-bg);
  font-weight: 600;
  transform: translateY(-160%);
  transition: transform var(--dur-fast) var(--ease-out);
}
.skip-link:focus { transform: none; }

/* ---------------------------------------------------------- Typography */
.mono {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-accent);
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 1.5rem;
}
.eyebrow::before {
  content: '';
  width: 28px; height: 1px;
  background: currentColor;
  flex: none;
}

.display, .h-xl, .h-md, .h-sm {
  font-family: var(--f-display);
  font-weight: 700;
  color: inherit;
}

.display {
  font-size: var(--fs-display);
  font-weight: 800;
  line-height: 0.94;
  letter-spacing: -0.035em;
  text-transform: uppercase;
}

.h-xl {
  font-size: var(--fs-h-xl);
  font-weight: 800;
  line-height: 0.98;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  max-width: 16ch;
  text-wrap: balance;
}

.h-md { font-size: var(--fs-h-md); line-height: 1.12; letter-spacing: -0.02em; }
.h-sm { font-size: var(--fs-h-sm); line-height: 1.25; letter-spacing: -0.01em; }

.lead {
  font-size: var(--fs-lead);
  line-height: 1.5;
  color: var(--c-text);
  max-width: 38ch;
}

.muted { color: var(--c-muted); }

p { max-width: 65ch; }

/* ------------------------------------------------------------- Buttons */
.btn {
  --btn-bg: transparent;
  --btn-fg: var(--c-text);
  --btn-bd: var(--c-border);
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 48px;
  padding: 14px 26px;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--btn-fg);
  background: var(--btn-bg);
  border: 1px solid var(--btn-bd);
  border-radius: var(--radius);
  overflow: hidden;
  isolation: isolate;
  transition: color var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out), background-color var(--dur) var(--ease-out);
}
.btn::before {
  content: '';
  position: absolute; inset: 0;
  z-index: -1;
  background: var(--btn-hover, var(--c-text));
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--dur) var(--ease-out);
}
.btn:hover::before, .btn:focus-visible::before { transform: scaleX(1); transform-origin: left; }
.btn:hover, .btn:focus-visible { color: var(--btn-hover-fg, var(--c-bg)); border-color: var(--btn-hover, var(--c-text)); }

/* .btn--gold is the primary button: navy on white sections, white on navy ones */
.btn--gold { --btn-bg: var(--c-btn); --btn-fg: var(--c-btn-fg); --btn-bd: var(--c-btn); --btn-hover: var(--c-accent); --btn-hover-fg: var(--c-btn-fg); }
.btn--outline { --btn-bd: var(--c-accent); --btn-hover: var(--c-text); }
.btn--ghost { --btn-bd: var(--c-border); }
.btn--sm { min-height: 42px; padding: 10px 18px; }
.btn--lg { min-height: 56px; padding: 18px 34px; }

.link-underline {
  background: linear-gradient(currentColor, currentColor) 0 100% / 0 1px no-repeat;
  transition: background-size var(--dur) var(--ease-out), color var(--dur-fast);
  padding-bottom: 2px;
}
.link-underline:hover, .link-underline:focus-visible { background-size: 100% 1px; }

/* -------------------------------------------------------- Scroll progress */
.scroll-progress {
  position: fixed; inset: 0 0 auto 0;
  height: 2px;
  z-index: var(--z-progress);
  pointer-events: none;
}
.scroll-progress span {
  display: block; height: 100%;
  background: linear-gradient(90deg, var(--c-accent), var(--c-blue));
  transform: scaleX(var(--progress, 0));
  transform-origin: left;
}

/* ------------------------------------------------------------- Header */
.site-header {
  position: fixed; inset: 0 0 auto 0;
  z-index: var(--z-header);
  height: var(--header-h);
  transition: background-color var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out), backdrop-filter var(--dur), color var(--dur);
  border-bottom: 1px solid transparent;
  /* over the navy hero: white type */
  --c-text: var(--white);
  --c-muted: rgba(255, 255, 255, 0.8);
  --c-border: rgba(255, 255, 255, 0.32);
  --c-accent: #A9C8EC;
  --c-btn: var(--white);
  --c-btn-fg: var(--navy);
  color: var(--c-text);
  background: linear-gradient(to bottom, rgba(7, 26, 51, 0.6), rgba(7, 26, 51, 0));
}
/* past the hero: white bar, navy type */
.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.94);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  backdrop-filter: blur(14px) saturate(1.4);
  border-bottom-color: #D5DEE8;
  --c-text: var(--navy);
  --c-muted: #4F6378;
  --c-border: #D5DEE8;
  --c-accent: #1D4E89;
  --c-btn: var(--navy);
  --c-btn-fg: var(--white);
}
/* backdrop-filter would make the header the containing block of the fixed
   mobile menu, so drop it whenever the menu is mounted */
.site-header:has(.mobile-menu:not([hidden])) {
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  background: transparent;
  border-bottom-color: transparent;
}
.site-header__inner {
  height: 100%;
  width: min(100% - 2 * var(--gutter), 1600px);
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 32px;
  position: relative;
  z-index: 2;
}

/* Logo image (white artwork): white over the film, navy on the white bar */
.brand { display: inline-flex; align-items: center; flex: none; }
.brand img { display: block; height: 72px; width: auto; transition: filter var(--dur) var(--ease-out); }
.site-header.is-scrolled .brand img { filter: url(#to-navy); }

.wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--f-display);
  font-size: 1.125rem;
  letter-spacing: 0.22em;
  white-space: nowrap;
}
.wordmark__rule {
  width: 18px; height: 2px;
  background: var(--c-accent);
  align-self: center;
  margin-right: 4px;
}
.wordmark__name { font-weight: 800; }
.wordmark__suffix { font-weight: 500; color: var(--c-accent); }
.wordmark--lg { font-size: 1.5rem; }

.nav { display: none; margin-left: auto; }
.nav__list { display: flex; gap: clamp(18px, 2vw, 34px); list-style: none; padding: 0; }
.nav__link {
  position: relative;
  font-size: var(--fs-sm);
  color: var(--c-muted);
  padding: 8px 0;
  transition: color var(--dur-fast);
}
.nav__link::after {
  content: '';
  position: absolute; left: 0; right: 0; bottom: 0;
  height: 1px;
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--dur) var(--ease-out);
}
.nav__link:hover, .nav__link:focus-visible, .nav__link.is-active { color: var(--c-text); }
.nav__link:hover::after, .nav__link.is-active::after { transform: scaleX(1); transform-origin: left; }

.site-header__cta { display: none; }

.menu-toggle {
  margin-left: auto;
  width: 48px; height: 48px;
  display: grid; place-items: center;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  transition: border-color var(--dur-fast);
}
.menu-toggle:hover { border-color: var(--c-accent); }
.menu-toggle__bars { position: relative; width: 20px; height: 8px; }
.menu-toggle__bars span {
  position: absolute; left: 0; right: 0;
  height: 1.5px;
  background: var(--c-text);
  transition: transform var(--dur) var(--ease-out), top var(--dur) var(--ease-out);
}
.menu-toggle__bars span:first-child { top: 0; }
.menu-toggle__bars span:last-child { top: 6.5px; }
.menu-toggle[aria-expanded='true'] .menu-toggle__bars span:first-child { top: 3.25px; transform: rotate(45deg); }
.menu-toggle[aria-expanded='true'] .menu-toggle__bars span:last-child { top: 3.25px; transform: rotate(-45deg); }

.mobile-menu {
  position: fixed; inset: 0;
  z-index: 1;
  height: 100vh; height: 100dvh;
  padding: calc(var(--header-h) + 32px) var(--gutter) 32px;
  background: var(--c-bg);
  overflow-y: auto;
  overscroll-behavior: contain;
  clip-path: inset(0 0 100% 0);
  transition: clip-path var(--dur-slow) var(--ease-inout);
}
.mobile-menu.is-open { clip-path: inset(0 0 0 0); }
.mobile-menu nav { display: flex; flex-direction: column; min-height: 100%; }
.mobile-menu__list { padding: 0; margin: 0 0 40px; }
.mobile-menu__list li { border-bottom: 1px solid var(--c-border); }
.mobile-menu__list a {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 18px 0;
  font-family: var(--f-display);
  font-size: clamp(1.75rem, 8vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--dur) var(--ease-out), transform var(--dur) var(--ease-out), color var(--dur-fast);
}
.mobile-menu__list a span { font-family: var(--f-mono); font-size: var(--fs-xs); color: var(--c-accent); letter-spacing: 0.14em; }
.mobile-menu__list a:hover, .mobile-menu__list a:focus-visible { color: var(--c-accent); }
.mobile-menu.is-open .mobile-menu__list a { opacity: 1; transform: none; }
.mobile-menu.is-open .mobile-menu__list li:nth-child(1) a { transition-delay: 120ms; }
.mobile-menu.is-open .mobile-menu__list li:nth-child(2) a { transition-delay: 170ms; }
.mobile-menu.is-open .mobile-menu__list li:nth-child(3) a { transition-delay: 220ms; }
.mobile-menu.is-open .mobile-menu__list li:nth-child(4) a { transition-delay: 270ms; }
.mobile-menu.is-open .mobile-menu__list li:nth-child(5) a { transition-delay: 320ms; }
.mobile-menu.is-open .mobile-menu__list li:nth-child(6) a { transition-delay: 370ms; }
.mobile-menu__cta { align-self: flex-start; }
.mobile-menu__meta { margin-top: auto; padding-top: 32px; color: var(--c-muted); }

/* --------------------------------------------------------------- Sections */
.section { position: relative; padding-block: var(--section-y); }

.section--light {
  background: var(--c-paper);
  color: var(--c-ink);
}
.section--light .eyebrow { color: var(--c-accent-ink); }
.section--light .lead { color: var(--c-ink); }
.section--light p { color: var(--c-ink-muted); }
.section--light ::selection { background: var(--c-ink); color: var(--c-paper); }
.section--light :focus-visible { outline-color: var(--c-ink); }

.section-head { margin-bottom: clamp(48px, 7vw, 104px); }
.section-head__note { margin-top: 1.5rem; color: var(--c-muted); max-width: 46ch; }
.section-head--split { display: grid; gap: 24px; align-items: end; }
.section-head--split .section-head__note { margin-top: 0; }

/* Media frames */
.media-frame {
  position: relative;
  overflow: hidden;
  background: var(--c-navy);
  aspect-ratio: 4 / 3;
}
.media-frame--light { background: var(--c-paper-2); }
.media-frame > img { width: 100%; height: 100%; object-fit: cover; }
.media-frame > svg { width: 100%; height: 100%; }
figcaption { margin-top: 14px; color: var(--c-muted); line-height: 1.6; }
.section--light figcaption { color: var(--c-ink-muted); }

/* =========================================================== 00 CINEMATIC
   .cinematic is the scroll track (height set by JS from the film length);
   .cinematic__stage stays pinned while the film is scrubbed. */
.cinematic { position: relative; background: var(--white); }
.cinematic__stage {
  position: relative;
  height: 100vh; height: 100svh;
  overflow: hidden;
  isolation: isolate;
  background: #E9EEF3;
}
.cinematic.is-pinned .cinematic__stage { position: sticky; top: 0; }
.cinematic__media { position: absolute; inset: 0; z-index: -2; }
.cinematic__poster, .cinematic__video {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: var(--focus, 50% 50%);
}
.cinematic__video { opacity: 0; }
.cinematic__video.is-ready { opacity: 1; }
/* top gradient keeps the white navigation legible over bright footage */
.cinematic__shade {
  position: absolute; inset: 0 0 auto 0; height: 180px; z-index: -1;
  background: linear-gradient(to bottom, rgba(7, 26, 51, 0.55), rgba(7, 26, 51, 0));
  pointer-events: none;
}
.cinematic__cue {
  position: absolute; left: var(--edge); bottom: calc(clamp(20px, 4vh, 40px) + 92px);
  display: flex; align-items: center; gap: 14px;
  color: var(--white);
  transition: opacity 300ms linear;
}
.cinematic__cue-track { position: relative; width: 1px; height: 44px; background: rgba(255, 255, 255, 0.4); overflow: hidden; }
.cinematic__cue-track span { position: absolute; left: 0; top: 0; width: 1px; height: 16px; background: var(--white); animation: scroll-cue 2.4s var(--ease-inout) infinite; }
/* soft hand-off from the final frame into the white page */
.cinematic__fade {
  position: absolute; inset: auto 0 0 0; height: 22vh;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0), var(--white));
  opacity: 0;
  pointer-events: none;
}

/* Chapter overlays — built from the site's own system: eyebrow, display
   headline, precision ticks, stat figure, and a chapter ruler. */
.cinematic__stage { --edge: calc((100% - min(100% - 2 * var(--gutter), var(--container))) / 2); }
.cinematic__scrim {
  position: absolute; inset: 0; z-index: -1;
  background:
    linear-gradient(90deg, rgba(7, 26, 51, 0.66) 0%, rgba(7, 26, 51, 0.34) 38%, rgba(7, 26, 51, 0) 64%),
    linear-gradient(to top, rgba(7, 26, 51, 0.6) 0%, rgba(7, 26, 51, 0) 34%);
  opacity: var(--overlay, 1);
  pointer-events: none;
}
.cine-ui { position: absolute; inset: 0; opacity: var(--overlay, 1); pointer-events: none; color: var(--white); text-shadow: 0 1px 2px rgba(7, 26, 51, 0.35), 0 2px 24px rgba(7, 26, 51, 0.45); }
.cine-ui[data-hidden], html.no-js .cine-ui { visibility: hidden; }
.cine-ui a, .cine-ui button { pointer-events: auto; }

.cine-copy { position: absolute; left: 0; right: 0; top: calc(var(--header-h) + clamp(32px, 11vh, 130px)); }
.cine-chapter {
  position: absolute; top: 0; left: 0; width: min(100%, 760px);
  opacity: 0; transform: translateY(24px);
  transition: opacity 650ms var(--ease-out), transform 650ms var(--ease-out);
}
.cine-chapter.is-active { opacity: 1; transform: none; }
.cine-chapter .eyebrow { color: var(--white); }
.cine-chapter__title {
  font-family: var(--f-display); font-weight: 800;
  font-size: clamp(2.2rem, 0.9rem + 4.6vw, 6.25rem);
  line-height: 0.94; letter-spacing: -0.035em; text-transform: uppercase;
  max-width: 13ch; text-wrap: balance;
}
.cine-chapter__rule { display: block; width: min(240px, 50%); height: 16px; margin: 30px 0 24px; overflow: visible; }
.cine-chapter__rule path { fill: none; stroke: var(--white); stroke-opacity: 0.85; stroke-width: 1; vector-effect: non-scaling-stroke; }
.cine-chapter__text { font-size: var(--fs-md); line-height: 1.55; max-width: 38ch; color: rgba(255, 255, 255, 0.92); }

/* key figure, styled like the specification stats */
.cine-figure {
  position: absolute; right: var(--edge); bottom: calc(clamp(20px, 4vh, 40px) + 104px);
  display: grid; justify-items: end; gap: 12px; text-align: right;
  transition: opacity 400ms var(--ease-out), transform 400ms var(--ease-out);
}
.cine-figure.is-swapping { opacity: 0; transform: translateY(10px); }
.cine-figure__label { display: flex; align-items: center; gap: 12px; color: rgba(255, 255, 255, 0.85); }
.cine-figure__label::before { content: ''; width: 28px; height: 1px; background: currentColor; }
.cine-figure__value {
  display: flex; align-items: baseline; gap: 0.12em;
  font-family: var(--f-display); font-weight: 800;
  font-size: clamp(3.25rem, 1.6rem + 5.4vw, 8rem); line-height: 0.85; letter-spacing: -0.05em;
  font-variant-numeric: tabular-nums;
}
.cine-figure__unit { font-size: 0.3em; font-weight: 600; letter-spacing: 0.02em; color: #A9C8EC; text-transform: uppercase; }

/* chapter ruler: one segment per chapter, filling as the film plays */
.cine-rail {
  position: absolute; left: 0; right: 0; bottom: clamp(20px, 4vh, 40px);
  display: grid; grid-template-columns: repeat(var(--chapters, 4), minmax(0, 1fr)); gap: 0;
}
.cine-seg {
  position: relative;
  display: grid; gap: 14px; justify-items: start;
  padding: 18px 16px 4px 0;
  text-align: left; color: rgba(255, 255, 255, 0.62);
  transition: color var(--dur-fast);
}
.cine-seg::before { content: ''; position: absolute; left: 0; top: 0; right: 0; height: 1px; background: rgba(255, 255, 255, 0.35); }
.cine-seg::after { content: ''; position: absolute; left: 0; top: -5px; width: 1px; height: 11px; background: rgba(255, 255, 255, 0.7); }
.cine-seg__fill { position: absolute; left: 0; top: -0.5px; right: 0; height: 2px; background: var(--white); transform: scaleX(var(--fill, 0)); transform-origin: left; }
.cine-seg__key { display: flex; gap: 14px; align-items: baseline; }
.cine-seg__num { color: #A9C8EC; }
.cine-seg:hover, .cine-seg[aria-current='step'] { color: var(--white); }
.cine-seg:focus-visible { outline: 2px solid var(--white); outline-offset: 4px; }

/* Static (reduced motion / no video): first chapter only */
.cinematic:not(.is-pinned) .cine-rail, .cinematic:not(.is-pinned) .cinematic__cue { display: none; }