/* Nuraforce opening sequence — a lightweight 2D interpretation of the
   supplied woven-particle reference. The loader is decorative and releases
   at the end of the five-second identity sequence. */

.site-intro {
  --intro-canvas: #03050b;
  --intro-canvas-soft: #0a1020;
  --intro-ink: #f7f9ff;
  position: fixed;
  z-index: 50000;
  inset: 0;
  display: none;
  overflow: hidden;
  contain: strict;
  isolation: isolate;
  color: var(--intro-ink);
  background:
    radial-gradient(circle at 50% 47%, rgba(76, 71, 181, 0.20), transparent 29%),
    radial-gradient(circle at 50% 52%, var(--intro-canvas-soft), var(--intro-canvas) 64%);
  cursor: wait;
  opacity: 1;
  pointer-events: auto;
}

.intro-pending,
.intro-playing {
  overflow: hidden;
  scroll-behavior: auto;
  scrollbar-gutter: stable;
}

.intro-pending body,
.intro-playing body {
  overflow: hidden !important;
}

.intro-pending .site-intro,
.intro-playing .site-intro {
  display: block;
}

.site-intro__canvas,
.site-intro__field {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.site-intro__canvas {
  z-index: 2;
  display: block;
}

.site-intro__field {
  z-index: 1;
  background:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    radial-gradient(circle at 34% 38%, rgba(76, 111, 255, 0.09), transparent 26%),
    radial-gradient(circle at 68% 62%, rgba(70, 225, 255, 0.075), transparent 28%);
  background-size: 56px 56px, 56px 56px, auto, auto;
  mask-image: radial-gradient(circle at 50% 50%, #000 0%, rgba(0, 0, 0, 0.72) 48%, transparent 88%);
  opacity: 0.55;
  transform: scale(1.04);
}

.site-intro::after {
  position: absolute;
  z-index: 4;
  inset: 0;
  content: "";
  background: radial-gradient(circle at 50% 49%, transparent 24%, rgba(0, 0, 0, 0.20) 62%, rgba(0, 0, 0, 0.62) 100%);
  pointer-events: none;
}

.site-intro__mark,
.site-intro__wordmark {
  position: absolute;
  z-index: 3;
  left: 50%;
  opacity: 0;
  will-change: transform, opacity, filter;
}

.site-intro__mark {
  top: 50%;
  display: block;
  width: var(--intro-mark-size, 220px);
  height: auto;
  filter: drop-shadow(0 0 28px rgba(90, 120, 255, 0.30)) drop-shadow(0 16px 42px rgba(0, 0, 0, 0.28));
  transform: translate(-50%, -50%) scale(0.88);
  user-select: none;
}

.site-intro__wordmark {
  top: 50%;
  width: max-content;
  color: var(--intro-ink);
  font-family: Inter, "SF Pro Display", ui-sans-serif, system-ui, sans-serif;
  font-size: clamp(1.45rem, 3.1vw, 2.65rem);
  font-weight: 850;
  letter-spacing: 0.46em;
  line-height: 1;
  text-indent: 0.46em;
  text-shadow: 0 0 32px rgba(255, 255, 255, 0.22);
  transform: translate(-50%, 18px) scale(0.98);
  white-space: nowrap;
}

.intro-pending .ambient *,
.intro-playing .ambient *,
.intro-pending .hero-optics *,
.intro-playing .hero-optics * {
  animation-play-state: paused !important;
}

:root[data-theme="light"] .site-intro {
  --intro-canvas: #eef2fb;
  --intro-canvas-soft: #f8faff;
  --intro-ink: #10172b;
  background:
    radial-gradient(circle at 50% 47%, rgba(94, 86, 230, 0.14), transparent 31%),
    radial-gradient(circle at 50% 52%, var(--intro-canvas-soft), var(--intro-canvas) 68%);
}

:root[data-theme="light"] .site-intro__field {
  background:
    linear-gradient(rgba(29, 47, 88, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(29, 47, 88, 0.028) 1px, transparent 1px),
    radial-gradient(circle at 34% 38%, rgba(76, 111, 255, 0.10), transparent 26%),
    radial-gradient(circle at 68% 62%, rgba(23, 153, 185, 0.08), transparent 28%);
  background-size: 56px 56px, 56px 56px, auto, auto;
}

:root[data-theme="light"] .site-intro::after {
  background: radial-gradient(circle at 50% 49%, transparent 25%, rgba(76, 92, 130, 0.05) 64%, rgba(76, 92, 130, 0.16) 100%);
}

:root[data-theme="light"] .site-intro__mark {
  filter: drop-shadow(0 0 28px rgba(81, 85, 220, 0.20)) drop-shadow(0 16px 42px rgba(56, 75, 120, 0.14));
}

:root[data-theme="light"] .site-intro__wordmark {
  text-shadow: 0 0 26px rgba(61, 77, 142, 0.13);
}

@media (max-width: 560px) {
  .site-intro__field {
    background-size: 38px 38px, 38px 38px, auto, auto;
    opacity: 0.42;
  }

  .site-intro__wordmark {
    font-size: clamp(1.25rem, 6.3vw, 1.65rem);
    letter-spacing: 0.32em;
    text-indent: 0.32em;
  }
}

@media (prefers-reduced-motion: reduce), (forced-colors: active) {
  .site-intro {
    display: none !important;
  }
}

@media print {
  .site-intro {
    display: none !important;
  }
}