:root {
  --bg: #030303;
  --glow: rgba(255, 230, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
}

body {
  background:
    radial-gradient(70vmax 50vmax at 50% 45%, rgba(255, 235, 64, 0.06), transparent 72%),
    var(--bg);
  font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.landing {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.logo-shell {
  margin: 0;
  position: relative;
  isolation: isolate;
  width: min(92vw, 1100px);
  animation:
    logo-enter 900ms cubic-bezier(0.2, 0.7, 0.2, 1) both,
    logo-float 4.6s ease-in-out 1s infinite;
}

.logo {
  position: relative;
  z-index: 2;
  display: block;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 12px 26px rgba(0, 0, 0, 0.6));
}

.fireflies {
  position: absolute;
  inset: -20% -10%;
  pointer-events: none;
  z-index: 1;
}

.firefly {
  position: absolute;
  top: 50%;
  left: 50%;
  width: var(--size);
  height: var(--size);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  offset-path: ellipse(var(--rx) var(--ry) at 0 0);
  offset-rotate: 0deg;
  background: rgba(255, 240, 120, 0.9);
  box-shadow:
    0 0 calc(var(--size) * 2) rgba(255, 240, 120, 0.95),
    0 0 calc(var(--size) * 5) rgba(255, 219, 61, 0.55);
  animation:
    orbit var(--dur) linear var(--delay) infinite,
    firefly-glow var(--blink) ease-in-out calc(var(--delay) * 0.5) infinite;
}

.firefly.near {
  opacity: 0.95;
  box-shadow:
    0 0 calc(var(--size) * 2.8) rgba(255, 245, 150, 1),
    0 0 calc(var(--size) * 6.2) rgba(255, 223, 66, 0.7);
}

.firefly.mid {
  opacity: 0.78;
  filter: blur(0.25px);
}

.firefly.far {
  opacity: 0.52;
  filter: blur(0.7px);
  box-shadow:
    0 0 calc(var(--size) * 1.8) rgba(255, 240, 120, 0.7),
    0 0 calc(var(--size) * 4.3) rgba(255, 213, 45, 0.38);
}

.firefly.rev {
  animation-direction: reverse, alternate;
}

.logo-shell::before {
  content: "";
  position: absolute;
  left: 18%;
  right: 18%;
  bottom: -8%;
  height: 14%;
  background: radial-gradient(closest-side, var(--glow), transparent 72%);
  filter: blur(12px);
  z-index: -1;
  animation: glow-pulse 4.6s ease-in-out 1s infinite;
}

@keyframes logo-enter {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes logo-float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-7px);
  }
}

@keyframes orbit {
  from {
    offset-distance: 0%;
  }
  to {
    offset-distance: 100%;
  }
}

@keyframes firefly-glow {
  0%,
  100% {
    opacity: 0.24;
    filter: saturate(0.92);
  }
  35% {
    opacity: 0.95;
    filter: saturate(1.2);
  }
  50% {
    opacity: 0.4;
  }
  72% {
    opacity: 0.85;
  }
}

@keyframes glow-pulse {
  0%,
  100% {
    opacity: 0.34;
    transform: scale(0.98);
  }
  50% {
    opacity: 0.54;
    transform: scale(1.02);
  }
}

@media (prefers-reduced-motion: reduce) {
  .firefly,
  .logo-shell,
  .logo-shell::before {
    animation: none;
  }
}