:root {
  --bg: #05050a;
  --text: rgba(244, 247, 255, 0.94);
  --muted: rgba(221, 226, 239, 0.58);
  --line: rgba(129, 233, 255, 0.44);
  --glow-rgb: 62, 43, 135;
  --transition: 560ms cubic-bezier(.22,.72,.18,1);
}

* { box-sizing: border-box; }
html, body { width: 100%; min-height: 100%; }
html { background: var(--bg); }
body {
  margin: 0;
  overflow: hidden;
  color: var(--text);
  background: var(--bg);
  font-family: Arial, Helvetica, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: geometricPrecision;
  overscroll-behavior: none;
}
button { font: inherit; }

.ambient {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  background:
    radial-gradient(circle at 50% 50%, rgba(28, 22, 58, .22), transparent 52%),
    var(--bg);
}
.ambient__glow {
  position: absolute;
  left: 50%; top: 50%;
  width: min(130vw, 1200px);
  aspect-ratio: 1;
  transform: translate(-50%, -50%) scale(1);
  border-radius: 50%;
  background: radial-gradient(circle,
    rgba(var(--glow-rgb), .15) 0%,
    rgba(var(--glow-rgb), .07) 28%,
    rgba(var(--glow-rgb), 0) 68%);
  filter: blur(34px);
  transition: background 1200ms ease;
  animation: breathe 24s ease-in-out infinite;
}
#particles { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .34; }
@keyframes breathe {
  0%,100% { transform: translate(-50%, -50%) scale(.96); opacity: .76; }
  50% { transform: translate(-50%, -50%) scale(1.08); opacity: 1; }
}

.archive { position: relative; width: 100%; height: 100dvh; }
.intro, .viewer, .end-screen {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: max(24px, env(safe-area-inset-top)) max(24px, env(safe-area-inset-right)) max(24px, env(safe-area-inset-bottom)) max(24px, env(safe-area-inset-left));
}

.intro { opacity: 0; visibility: hidden; transition: opacity 900ms ease, visibility 900ms ease; }
.intro.is-visible { opacity: 1; visibility: visible; }
.intro__content { width: min(86vw, 520px); text-align: center; }
.eyebrow {
  margin: 0 0 28px;
  letter-spacing: .34em;
  font-size: 12px;
  color: var(--muted);
}
.intro h1 {
  margin: 0;
  font-size: clamp(32px, 6vw, 54px);
  line-height: 1.04;
  font-weight: 500;
  letter-spacing: -.035em;
}
.subtitle {
  margin: 15px 0 32px;
  font-size: clamp(15px, 2.5vw, 19px);
  color: var(--muted);
  letter-spacing: .03em;
}
.intro__line {
  width: min(240px, 58vw);
  height: 1px;
  margin: 0 auto 32px;
  background: rgba(255,255,255,.09);
  overflow: hidden;
}
.intro__line span {
  display: block;
  width: 100%; height: 100%;
  transform-origin: left;
  transform: scaleX(0);
  background: linear-gradient(90deg, rgba(58,218,234,.25), rgba(179,104,255,.85), rgba(58,218,234,.25));
  animation: introLine 2.2s .25s cubic-bezier(.2,.8,.2,1) forwards;
}
@keyframes introLine { to { transform: scaleX(1); } }
.enter {
  border: 0;
  padding: 11px 24px;
  color: rgba(244,247,255,.76);
  background: transparent;
  letter-spacing: .28em;
  text-transform: uppercase;
  font-size: 12px;
  cursor: pointer;
  transition: color 240ms ease, text-shadow 240ms ease, transform 240ms ease;
}
.enter:hover, .enter:focus-visible {
  color: #fff;
  text-shadow: 0 0 18px rgba(151,110,255,.76);
  transform: translateY(-1px);
}

.viewer { opacity: 0; transition: opacity 750ms ease; }
.viewer.is-visible { opacity: 1; }
.page-stage {
  width: 100%; height: 100%;
  display: grid; place-items: center;
  touch-action: pan-y;
}
.page-image {
  display: block;
  max-width: min(92vw, calc((100dvh - 64px) * .4614));
  max-height: calc(100dvh - 64px);
  width: auto; height: auto;
  object-fit: contain;
  user-select: none;
  -webkit-user-drag: none;
  filter: drop-shadow(0 18px 56px rgba(0,0,0,.50));
  opacity: 1;
  transform: translateY(0) scale(1);
  transition: opacity var(--transition), transform var(--transition), filter 800ms ease;
}
.page-image.is-leaving-next { opacity: 0; transform: translateY(-10px) scale(.995); }
.page-image.is-leaving-prev { opacity: 0; transform: translateY(10px) scale(.995); }
.page-image.is-entering-next { opacity: 0; transform: translateY(12px) scale(.995); }
.page-image.is-entering-prev { opacity: 0; transform: translateY(-12px) scale(.995); }

.nav {
  position: fixed;
  top: 50%;
  width: 74px; height: 92px;
  margin-top: -46px;
  border: 0;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  opacity: .36;
  transition: opacity 260ms ease, filter 260ms ease;
}
.nav--prev { left: max(0px, env(safe-area-inset-left)); }
.nav--next { right: max(0px, env(safe-area-inset-right)); }
.nav span {
  position: absolute;
  top: 50%;
  width: 32px; height: 1px;
  background: currentColor;
  box-shadow: 0 0 0 rgba(145,105,255,0);
  transition: width 260ms ease, box-shadow 260ms ease;
}
.nav--prev span { right: 18px; }
.nav--next span { left: 18px; }
.nav span::before {
  content: "";
  position: absolute;
  top: -4px;
  width: 8px; height: 8px;
  border-top: 1px solid currentColor;
}
.nav--prev span::before { left: 0; border-left: 1px solid currentColor; transform: rotate(-45deg); }
.nav--next span::before { right: 0; border-right: 1px solid currentColor; transform: rotate(45deg); }
.nav:hover, .nav:focus-visible { opacity: .92; filter: drop-shadow(0 0 10px rgba(146,111,255,.64)); }
.nav:hover span, .nav:focus-visible span { width: 40px; box-shadow: 0 0 16px rgba(146,111,255,.50); }
.nav:disabled { opacity: 0; pointer-events: none; }
.counter {
  position: fixed;
  left: 50%; bottom: max(14px, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  font-size: 10px;
  letter-spacing: .24em;
  color: rgba(232,235,244,.48);
  transition: opacity 360ms ease;
}
.viewer.controls-hidden .nav,
.viewer.controls-hidden .counter { opacity: 0; pointer-events: none; }

.end-screen { opacity: 0; visibility: hidden; transition: opacity 1100ms ease, visibility 1100ms ease; }
.end-screen.is-visible { opacity: 1; visibility: visible; }
.end-screen p {
  margin: 0;
  max-width: 760px;
  text-align: center;
  font-size: clamp(22px, 4.3vw, 42px);
  font-weight: 400;
  letter-spacing: -.02em;
  color: rgba(244,247,255,.90);
}

@media (max-width: 720px) {
  .intro, .viewer, .end-screen { padding: max(18px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) max(18px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left)); }
  .page-image {
    max-width: min(96vw, calc((100dvh - 30px) * .4614));
    max-height: calc(100dvh - 30px);
    filter: drop-shadow(0 12px 32px rgba(0,0,0,.42));
  }
  .nav { top: auto; bottom: max(4px, env(safe-area-inset-bottom)); width: 68px; height: 56px; margin: 0; }
  .nav--prev { left: max(4px, env(safe-area-inset-left)); }
  .nav--next { right: max(4px, env(safe-area-inset-right)); }
  .nav--prev span { right: 14px; }
  .nav--next span { left: 14px; }
  .counter { bottom: max(21px, calc(env(safe-area-inset-bottom) + 10px)); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 1ms !important; animation-iteration-count: 1 !important; transition-duration: 1ms !important; }
}

/* v1.0.1 — reliable archive entrance on touch devices */
.enter {
  position: relative;
  z-index: 5;
  min-width: 112px;
  min-height: 44px;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  pointer-events: auto;
}
.enter:active {
  color: #fff;
  text-shadow: 0 0 18px rgba(151,110,255,.76);
  transform: translateY(1px) scale(.985);
}
.enter:disabled { cursor: wait; opacity: .72; }
.intro.is-entering .intro__content { pointer-events: none; }