/* ---------- tokens ---------- */
:root {
  --indigo: #140f38;
  --violet: #5b2a66;
  --coral: #ff7a59;
  --amber: #ffb347;
  --rose: #ff8fa3;
  --cream: #f6ecdf;
  --ink: #221a33;
  --warm-white: #fff6ec;
  --font-display: 'Fraunces', georgia, serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;
  --nav-pad: clamp(20px, 3vw, 44px);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--indigo);
  color: var(--warm-white);
  font-family: var(--font-display);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; color: inherit; }
body.lb-open { overflow: hidden; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  clip-path: inset(50%); overflow: hidden; white-space: nowrap;
}

/* ---------- preloader ---------- */
.preloader {
  position: fixed; inset: 0; z-index: 100;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 22px;
  background: var(--indigo);
  transition: opacity 0.9s ease, visibility 0.9s;
}
.preloader--done { opacity: 0; visibility: hidden; }
.preloader__ring {
  width: 56px; height: 56px; border-radius: 50%;
  border: 1.5px solid rgba(255, 246, 236, 0.12);
  border-top-color: var(--coral);
  animation: spin 1.1s linear infinite;
}
.preloader__label {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.35em;
  color: rgba(255, 246, 236, 0.65);
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- stage (fixed webgl canvas) ---------- */
.stage { position: fixed; inset: 0; z-index: 0; }
.stage canvas { width: 100%; height: 100%; display: block; }
.stage__fallback {
  position: absolute; inset: 0; display: none;
  background:
    radial-gradient(circle at 50% 78%, var(--amber) 0%, var(--coral) 18%, transparent 42%),
    linear-gradient(to bottom, var(--indigo) 0%, var(--violet) 55%, var(--coral) 78%, var(--indigo) 100%);
}
.no-webgl .stage canvas { display: none; }
.no-webgl .stage__fallback { display: block; }

/* ---------- grain ---------- */
.grain {
  position: fixed; inset: -50%; z-index: 40; pointer-events: none;
  opacity: 0.055;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain-shift 0.9s steps(3) infinite;
}
@keyframes grain-shift {
  0% { transform: translate(0, 0); }
  33% { transform: translate(-2%, 1%); }
  66% { transform: translate(1%, -2%); }
  100% { transform: translate(0, 0); }
}

/* ---------- fluid trail ---------- */
/* difference blend: the fluid dye inverts whatever it passes over, so the
 * "negative" zone travels with the fire itself. Transparent = no effect. */
.fluid-canvas {
  position: fixed;
  inset: 0;
  /* A canvas keeps its intrinsic (DPR-scaled) size unless told otherwise,
   * which offset everything by the DPR factor. Pin it to the viewport. */
  width: 100%;
  height: 100%;
  z-index: 60;
  pointer-events: none;
  mix-blend-mode: difference;
}

/* ---------- nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--nav-pad);
  mix-blend-mode: difference; /* stays legible over cream and indigo alike */
  color: #fff;
}
.nav__logo {
  font-family: var(--font-display); font-weight: 600;
  font-size: 28px; line-height: 1;
}
.nav__logo span { color: var(--coral); }
.nav__links { display: flex; gap: clamp(18px, 3vw, 40px); }
.nav__links a {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.28em;
  opacity: 0.75; transition: opacity 0.3s;
  padding-bottom: 3px; border-bottom: 1px solid transparent;
}
.nav__links a:hover { opacity: 1; border-bottom-color: var(--coral); }

/* ---------- hero DOM layer ---------- */
main { position: relative; z-index: 10; }
.hero {
  height: 100svh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: flex-end;
  text-align: center;
  padding-bottom: clamp(28px, 6vh, 64px);
  gap: 18px;
}
.hero__kicker {
  position: absolute; top: clamp(76px, 12vh, 120px);
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.4em;
  color: rgba(255, 246, 236, 0.55);
}
.hero__tagline {
  font-size: clamp(17px, 2vw, 22px);
  font-style: italic; font-weight: 340;
  line-height: 1.55;
  color: rgba(255, 246, 236, 0.92);
  text-shadow: 0 2px 24px rgba(20, 15, 56, 0.6);
}
.hero__scroll-hint {
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.4em;
  color: rgba(255, 246, 236, 0.5);
}
.hero__scroll-hint span {
  width: 1px; height: 34px;
  background: linear-gradient(to bottom, transparent, var(--coral));
  animation: drip 1.8s ease-in-out infinite;
}
@keyframes drip {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* hero entrance: revealed by JS after preloader */
.hero__kicker, .hero__tagline, .hero__scroll-hint { opacity: 0; }
.hero--in .hero__kicker { animation: fade-up 1.2s 0.9s ease forwards; }
.hero--in .hero__tagline { animation: fade-up 1.2s 1.15s ease forwards; }
.hero--in .hero__scroll-hint { animation: fade-up 1.2s 1.5s ease forwards; }
@keyframes fade-up {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .grain, .hero__scroll-hint span, .preloader__ring { animation: none; }
  .hero--in .hero__kicker, .hero--in .hero__tagline, .hero--in .hero__scroll-hint {
    animation: none; opacity: 1;
  }
}