:root {
  --bg: #020202;
  --accent: #f28705;
  --glow: rgba(242, 135, 5, 0.35);
}

* {
  box-sizing: border-box;
}

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

body {
  background:
    radial-gradient(70vmax 50vmax at 50% 45%, rgba(255, 255, 255, 0.04), transparent 70%),
    var(--bg);
  font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.particles {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

.particle {
  position: absolute;
  left: var(--x);
  bottom: -10vh;
  width: calc(var(--s) * 2px);
  height: calc(var(--s) * 2px);
  border-radius: 50%;
  background: rgba(228, 236, 248, var(--a));
  box-shadow: 0 0 calc(var(--s) * 5px) rgba(242, 135, 5, 0.08);
  animation: particle-rise var(--d) linear var(--delay) infinite;
}

.landing {
  position: relative;
  z-index: 1;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.logo-shell {
  margin: 0;
  position: relative;
  max-width: min(86vw, 760px);
  width: 100%;
  animation:
    logo-enter 900ms cubic-bezier(0.2, 0.7, 0.2, 1) both,
    logo-float 4.2s ease-in-out 1s infinite;
}

.logo {
  display: block;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 10px 24px rgba(0, 0, 0, 0.65));
}

.logo-shell::after {
  content: "";
  position: absolute;
  inset: -10% -8%;
  background: radial-gradient(ellipse at center, rgba(255, 255, 255, 0.08), transparent 68%);
  opacity: 0.24;
  filter: blur(10px);
  pointer-events: none;
  animation: aura-breathe 4.2s ease-in-out 1s infinite;
}

.logo-shell::before {
  content: "";
  position: absolute;
  left: 15%;
  right: 15%;
  bottom: -6%;
  height: 12%;
  background: radial-gradient(closest-side, var(--glow), transparent 70%);
  filter: blur(10px);
  animation: glow-pulse 4.2s ease-in-out 1s infinite;
  z-index: -1;
}

@keyframes logo-enter {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes particle-rise {
  0% {
    transform: translate3d(0, 0, 0);
    opacity: 0;
  }
  12% {
    opacity: var(--a);
  }
  88% {
    opacity: var(--a);
  }
  100% {
    transform: translate3d(var(--drift), -115vh, 0);
    opacity: 0;
  }
}

@keyframes logo-float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

@keyframes aura-breathe {
  0%,
  100% {
    opacity: 0.14;
    transform: scale(0.98);
  }
  50% {
    opacity: 0.3;
    transform: scale(1.02);
  }
}

@keyframes glow-pulse {
  0%,
  100% {
    opacity: 0.38;
    transform: scale(0.98);
  }
  50% {
    opacity: 0.62;
    transform: scale(1.01);
  }
}

@media (max-width: 680px) {
  .logo-shell {
    max-width: min(92vw, 560px);
  }
}

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