:root {
  color-scheme: dark;
  --base: #04070c;
  --cyan: #00e8ff;
  --violet: #c94fff;
  --blue: #0077ff;
  --amber: #ff7b00;
  --green: #39ff14;
}
* { box-sizing: border-box; }
html, body { min-height: 100%; margin: 0; }
body { background: var(--base); color: #fff; font-family: Arial, Helvetica, sans-serif; }
a { color: inherit; }
a:focus-visible { outline: 2px solid var(--cyan); outline-offset: 4px; }
.scene {
  position: relative;
  isolation: isolate;
  min-height: 100svh;
  overflow: hidden;
  background: var(--base);
}
.skyline, .shade, .tracers { position: absolute; inset: 0; }
.skyline {
  z-index: 0;
  display: block;
  width: 100%;
  height: 100%;
  min-height: 100svh;
  object-fit: cover;
  object-position: center center;
  filter: grayscale(.8) contrast(1.15) brightness(.75);
}
.shade {
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 49% 44%, transparent 5%, rgba(4,7,12,.14) 43%, rgba(4,7,12,.69) 100%),
    linear-gradient(180deg, rgba(4,7,12,.22) 0%, transparent 32%, rgba(4,7,12,.08) 58%, rgba(4,7,12,.78) 100%);
}
.tracers {
  z-index: 2;
  width: 100%;
  height: 100%;
  min-height: 100svh;
  pointer-events: none;
  mix-blend-mode: screen;
}
.rail, .pulse {
  vector-effect: non-scaling-stroke;
  stroke: var(--trace-color);
}
.cyan { --trace-color: var(--cyan); }
.violet { --trace-color: var(--violet); }
.blue { --trace-color: var(--blue); }
.amber { --trace-color: var(--amber); }
.green { --trace-color: var(--green); }
.rail { stroke-width: 1.4; opacity: .35; }
.pulse {
  stroke-width: 2.5;
  stroke-dasharray: 26 180;
  filter: drop-shadow(0 0 4px var(--trace-color)) drop-shadow(0 0 9px var(--trace-color));
  animation: trace 10s linear infinite;
}
.pulse.violet { animation-duration: 13s; animation-delay: -4s; }
.pulse.blue { animation-duration: 9s; animation-delay: -7s; }
.pulse.amber { animation-duration: 12s; animation-delay: -2s; }
.pulse.green { animation-duration: 11s; animation-delay: -6s; }
.point { fill: var(--trace-color); filter: drop-shadow(0 0 5px var(--trace-color)); opacity: .7; }
.mark-cluster {
  position: absolute;
  left: clamp(1.5rem, 6vw, 7rem);
  bottom: clamp(4rem, 10vh, 8rem);
  z-index: 3;
  width: clamp(17rem, 41vw, 37rem);
  max-width: calc(100vw - 3rem);
}
.mark-tracers {
  position: absolute;
  z-index: 0;
  top: -21%;
  left: -15%;
  width: 130%;
  height: 142%;
  overflow: visible;
  pointer-events: none;
  mix-blend-mode: screen;
}
.mark-tracers .rail { opacity: .52; }
.mark-tracers .pulse { stroke-width: 2; stroke-dasharray: 18 110; animation-name: trace-mark; }
.mark-tracers .pulse.violet { animation-delay: -3s; }
 .wordmark { position: relative; z-index: 1; margin: 0; width: 100%; }
.wordmark img {
  display: block;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 5px 24px rgba(0,0,0,.65));
}
.credit {
  position: absolute;
  right: clamp(1rem, 2.5vw, 2.5rem);
  bottom: 1rem;
  z-index: 4;
  max-width: calc(100% - 2rem);
  color: rgba(255,255,255,.72);
  font-size: .7rem;
  line-height: 1.4;
  text-align: right;
}
.credit a { text-decoration-color: rgba(255,255,255,.48); text-underline-offset: .18rem; }
.credit a:hover { color: var(--cyan); }
@keyframes trace { to { stroke-dashoffset: -824; } }
@keyframes trace-mark { to { stroke-dashoffset: -768; } }
@media (max-width: 700px) {
  .skyline { object-position: 52% center; }
  .shade { background: linear-gradient(180deg, rgba(4,7,12,.23), rgba(4,7,12,.12) 40%, rgba(4,7,12,.78)); }
  .mark-cluster { left: 50%; bottom: 15%; width: min(72vw, 24rem); transform: translateX(-50%); }
  .credit { right: 1rem; bottom: .7rem; left: 1rem; max-width: none; text-align: center; }
}
@media (prefers-reduced-motion: reduce) {
  .pulse { animation: none; stroke-dasharray: 52 240; }
}