:root {
  --bg: #0b0b0b;
  --fg: #f4f1ea;
  --shade: rgba(0, 0, 0, 0.45);
}

*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  overflow: hidden;
}

#mosaic,
.shade {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
}

#mosaic { display: block; }

/* darken the mosaic, a bit more in the centre behind the logo */
.shade {
  background:
    radial-gradient(ellipse 70% 60% at 50% 50%, rgba(0, 0, 0, 0.35), transparent 75%),
    var(--shade);
  pointer-events: none;
}

main {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(0.75rem, 3vh, 2rem);
  padding: 2rem 16px;
  text-align: center;
}

h1 { margin: 0; line-height: 0; }

h1 img {
  width: min(88vw, 900px, 105vh);
  height: auto;
  filter: drop-shadow(0 0 18px rgba(0, 0, 0, 0.6));
}

.save {
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  font-family: "Anton", "Impact", "Arial Narrow", sans-serif;
  text-transform: uppercase;
  line-height: 1;
  text-shadow: 0 0 16px rgba(0, 0, 0, 0.7);
}

.kicker {
  font-size: clamp(1rem, 2.6vw, 1.75rem);
  letter-spacing: 0.35em;
  margin-right: -0.35em; /* compensate trailing letter-spacing */
}

.date {
  font-size: clamp(3rem, 12vw, 8rem);
  letter-spacing: 0.04em;
}

/* film grain over the whole page; the oversized layer jumps around so the
   noise flickers like film instead of sitting still */
.grain {
  position: fixed;
  inset: -50%;
  background: url("../img/grain.png") repeat;
  opacity: var(--grain, 0.4);
  mix-blend-mode: overlay;
  pointer-events: none;
  z-index: 1;
  animation: grain 1s steps(1) infinite;
}

@keyframes grain {
  0%   { transform: translate(0, 0); }
  12%  { transform: translate(-7%, 4%); }
  25%  { transform: translate(5%, -9%); }
  37%  { transform: translate(-11%, -3%); }
  50%  { transform: translate(8%, 10%); }
  62%  { transform: translate(-4%, -12%); }
  75%  { transform: translate(12%, 2%); }
  87%  { transform: translate(-9%, 8%); }
}

@media (prefers-reduced-motion: reduce) {
  .grain { animation: none; }
}