/* ==========================================================================
   AL BAHAA CONTRACTING - CINEMATIC INTRO & BRAND TRANSITION (ENGINEERING GRADE)
   ========================================================================== */

:root {
  --intro-bg-color: #c3dae3;
  --intro-z-index: 999999;
  --intro-transition-speed: 650ms;
}

/* Ensure stable scrollbar layout globally without layout shifts */
html {
  scrollbar-gutter: stable;
}

/* Primary Preloader Overlay */
#site-preloader {
  position: fixed;
  inset: 0;
  width: 100vw;
  width: 100dvw;
  height: 100vh;
  height: 100dvh;
  z-index: var(--intro-z-index);
  background-color: var(--intro-bg-color);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  pointer-events: auto;
  opacity: 1;
  visibility: visible;
  transition: opacity var(--intro-transition-speed) cubic-bezier(0.16, 1, 0.3, 1),
              visibility var(--intro-transition-speed) cubic-bezier(0.16, 1, 0.3, 1);
  transform: translateZ(0);
  backface-visibility: hidden;
  will-change: opacity, visibility;
}

#site-preloader.is-fading-out {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

/* Video Stage Container */
.intro-video-stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: min(90vw, 1200px);
  max-height: min(80dvh, 675px);
  aspect-ratio: 16 / 9;
}

/* Video Player with Gamma Edge-Feathering Mask */
.intro-video-player {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background-color: var(--intro-bg-color);
  display: block;
  transform: translateZ(0);
  will-change: transform;
  /* Radial Feathering Mask to eliminate YUV-sRGB gamma seam */
  -webkit-mask-image: radial-gradient(ellipse 85% 85% at 50% 50%, black 72%, transparent 100%);
  mask-image: radial-gradient(ellipse 85% 85% at 50% 50%, black 72%, transparent 100%);
}

/* Fast-Path Non-intrusive Skip Control */
.intro-skip-btn {
  position: absolute;
  bottom: 24px;
  right: 24px;
  z-index: calc(var(--intro-z-index) + 1);
  background-color: rgba(12, 46, 73, 0.08);
  border: 1px solid rgba(12, 46, 73, 0.22);
  color: var(--color-primary, #0c2e49);
  padding: 8px 18px;
  font-family: var(--font-heading, "Ridley Grotesk", sans-serif);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 2px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity 300ms ease, transform 300ms ease, background-color 200ms ease, color 200ms ease;
  will-change: opacity, transform;
}

.intro-skip-btn.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.intro-skip-btn:hover,
.intro-skip-btn:focus-visible {
  background-color: var(--color-primary, #0c2e49);
  color: var(--color-white, #ffffff);
  border-color: var(--color-primary, #0c2e49);
  outline: none;
}

/* Architectural Hero Reveal Orchestration */
body.intro-active .site-header {
  transform: translateY(-100%);
  transition: transform var(--intro-transition-speed) cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform;
}

body.intro-active .home-hero__card {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--intro-transition-speed) cubic-bezier(0.16, 1, 0.3, 1),
              transform var(--intro-transition-speed) cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

body.intro-reveal .site-header {
  transform: translateY(0);
}

body.intro-reveal .home-hero__card {
  opacity: 1;
  transform: translateY(0);
}

/* Clean up will-change after transition completes */
body.intro-complete .site-header,
body.intro-complete .home-hero__card {
  will-change: auto;
}

/* Header Brand Interactive Motion & Video Loop */
.site-header__brand {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.site-header__logo-video {
  height: 44px;
  width: auto;
  aspect-ratio: 752 / 240;
  object-fit: contain;
  background-color: transparent;
  display: block;
  pointer-events: auto;
  cursor: pointer;
  filter: brightness(0) invert(1);
  transition: transform 260ms ease, opacity 260ms ease;
  transform: translateZ(0);
}

.site-header__brand:hover .site-header__logo-video {
  transform: scale(1.03);
}

.site-header__logo {
  transition: transform 300ms ease, filter 300ms ease;
}

.site-header__brand:hover .site-header__logo {
  transform: scale(1.025);
}