/* ============================================================
   DERBY LIFESCIENCE — Ultra-premium particle loader
   Canvas particles assemble into the logo · white → pine stage
   Primary #769382 · Secondary #A8B8AD · Accent #47624F
   ============================================================ */

:root {
  --l-primary:   #769382;
  --l-secondary: #A8B8AD;
  --l-accent:    #47624F;
  --l-pine:      #1E2821;
  --l-e:         cubic-bezier(0.22, 1, 0.36, 1);
}

/* lock scroll while the loader is up (class added by js/loader.js) */
html.is-loading, html.is-loading body { overflow: hidden; }

.loader {
  position: fixed; inset: 0; z-index: 9999; overflow: hidden;
  background: radial-gradient(60% 55% at 50% 44%, #26332B 0%, #1E2821 55%, #141C17 100%);
  transition: opacity 0.8s var(--l-e), visibility 0.8s var(--l-e);
}
/* Scene 8 · seamless fade + scale hand-off to the homepage */
.loader.is-done { opacity: 0; visibility: hidden; }

.loader__canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }

/* soft ambient centre glow (Scene 1 → Scene 7) */
.loader__ambient {
  position: absolute; left: 50%; top: 44%; width: 620px; height: 620px; transform: translate(-50%, -50%);
  border-radius: 50%; pointer-events: none; opacity: 0;
  background: radial-gradient(circle, rgba(118,147,130,0.22), rgba(168,184,173,0.10) 45%, transparent 68%);
  filter: blur(20px); transition: opacity 1.1s var(--l-e);
  animation: lBreathe 6s ease-in-out infinite;
}
.loader.is-dark .loader__ambient { opacity: 1; }
@keyframes lBreathe { 0%,100% { transform: translate(-50%,-50%) scale(1); } 50% { transform: translate(-50%,-50%) scale(1.06); } }

/* Scene 8 · expanding wave of light */
.loader__wave {
  position: absolute; left: 50%; top: 44%; width: 20px; height: 20px; transform: translate(-50%,-50%) scale(0);
  border-radius: 50%; pointer-events: none; opacity: 0;
  background: radial-gradient(circle, rgba(237,231,216,0.55), rgba(168,184,173,0.28) 40%, transparent 70%);
}
.loader.is-done .loader__wave { animation: lWave 0.85s var(--l-e) forwards; }
@keyframes lWave { 0% { opacity: 0.9; transform: translate(-50%,-50%) scale(0); } 100% { opacity: 0; transform: translate(-50%,-50%) scale(60); } }

/* ---------- centred UI ---------- */
.loader__ui {
  position: absolute; inset: 0; z-index: 2;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 24px; text-align: center;
}
.loader__stage { position: relative; width: 160px; height: 160px; display: grid; place-items: center; }

/* soft halo that expands behind the logo (Scene 4) */
.loader__halo {
  position: absolute; width: 240px; height: 240px; border-radius: 50%; pointer-events: none;
  background: radial-gradient(circle, rgba(118,147,130,0.5) 0%, rgba(71,98,79,0.22) 45%, transparent 70%);
  filter: blur(14px); opacity: 0; transform: scale(0.6);
  transition: opacity 0.9s var(--l-e), transform 1s var(--l-e);
}
.loader.reveal .loader__halo { opacity: 1; transform: scale(1); animation: lBreathe 5s ease-in-out infinite 1s; }

/* pulse rings (Scene 7) */
.loader__ring {
  position: absolute; width: 150px; height: 150px; border-radius: 50%; pointer-events: none;
  border: 1px solid rgba(168,184,173,0.4); opacity: 0;
}
.loader.reveal .loader__ring { animation: lPulse 3.4s var(--l-e) infinite; }
.loader.reveal .loader__ring--2 { animation-delay: 1.7s; }
@keyframes lPulse {
  0%   { opacity: 0.55; transform: scale(0.7); }
  70%  { opacity: 0; }
  100% { opacity: 0; transform: scale(1.9); }
}

/* logo — hidden until the particles have assembled, then revealed */
.loader__logo { position: relative; z-index: 2; display: grid; place-items: center; overflow: hidden; border-radius: 12px; }
.loader__logo img {
  position: relative; z-index: 1; width: 96px; height: auto; display: block;
  filter: drop-shadow(0 14px 30px rgba(0,0,0,0.28));
  opacity: 0; transform: scale(0.9);
  transition: opacity 0.7s var(--l-e), transform 0.9s var(--l-e);
}
.loader.reveal .loader__logo img { opacity: 1; transform: scale(1); animation: lLogoBreathe 4.5s ease-in-out infinite 1s; }
@keyframes lLogoBreathe { 0%,100% { transform: scale(1); } 50% { transform: scale(1.035); } }

/* left → right light shimmer across the logo (Scene 4) */
.loader__shimmer {
  position: absolute; inset: 0; z-index: 2; pointer-events: none;
  background: linear-gradient(105deg, transparent 30%, rgba(255,255,255,0.55) 48%, transparent 66%);
  transform: translateX(-130%); mix-blend-mode: screen; opacity: 0;
}
.loader.reveal .loader__shimmer { animation: lShimmer 1.5s var(--l-e) 0.5s; }
@keyframes lShimmer { 0% { transform: translateX(-130%); opacity: 0; } 25% { opacity: 1; } 60%,100% { transform: translateX(130%); opacity: 0; } }

/* ---------- name · tagline · progress ---------- */
.loader__name, .loader__tag, .loader__bar {
  opacity: 0; transform: translateY(12px); transition: opacity 0.8s var(--l-e), transform 0.8s var(--l-e);
}
.loader.reveal .loader__name, .loader.reveal .loader__tag, .loader.reveal .loader__bar { opacity: 1; transform: translateY(0); }
.loader.reveal .loader__tag { transition-delay: 0.14s; }
.loader.reveal .loader__bar { transition-delay: 0.28s; }

.loader__name {
  margin-top: 34px;
  font-size: clamp(13px, 1.5vw, 15.5px); font-weight: 800;
  letter-spacing: 0.34em; text-transform: uppercase; color: #EDE7D8;
  text-indent: 0.34em;   /* keep glyphs optically centred despite tracking */
}
.loader__tag {
  margin-top: 12px; max-width: 440px;
  font-size: 13px; line-height: 1.5; color: rgba(237,231,216,0.72);
}
.loader__bar {
  margin-top: 30px; width: 220px; height: 2px; border-radius: 2px; overflow: hidden; position: relative;
  background: rgba(168,184,173,0.2);
}
.loader__bar span {
  display: block; height: 100%; width: 0; border-radius: 2px; position: relative;
  background: linear-gradient(90deg, var(--l-secondary), var(--l-primary), var(--l-accent));
}
/* moving glow riding the leading edge of the bar */
.loader__bar span::after {
  content: ""; position: absolute; top: -3px; right: -4px; width: 14px; height: 8px; border-radius: 50%;
  background: radial-gradient(circle, rgba(237,231,216,0.9), transparent 70%); filter: blur(1px);
}

/* ---------- responsive ---------- */
@media (max-width: 480px) {
  .loader__stage { width: 132px; height: 132px; }
  .loader__logo img { width: 78px; }
  .loader__halo { width: 190px; height: 190px; }
  .loader__ring { width: 120px; height: 120px; }
  .loader__name { margin-top: 26px; letter-spacing: 0.26em; text-indent: 0.26em; }
  .loader__tag { font-size: 12.5px; padding: 0 12px; }
  .loader__bar { width: 180px; }
}

/* ---------- reduced motion — skip the show, keep the brand card ---------- */
@media (prefers-reduced-motion: reduce) {
  .loader { background: radial-gradient(60% 55% at 50% 44%, #26332B, #1E2821 60%, #141C17); }
  .loader__canvas, .loader__wave, .loader__ring, .loader__shimmer { display: none; }
  .loader__ambient { opacity: 1; animation: none; }
  .loader__halo { opacity: 1; transform: scale(1); animation: none; }
  .loader__logo img { opacity: 1; transform: none; animation: none; }
  .loader__name, .loader__tag, .loader__bar { opacity: 1; transform: none; }
}