* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  overflow: hidden;
  font-family: Arial, Helvetica, sans-serif;
  background: #f8fcff;
}

.hero {
  position: relative;
  width: 100vw;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6vw;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 38%, rgba(255, 255, 255, 1) 0%, rgba(235, 247, 255, .92) 42%, rgba(190, 224, 248, .72) 74%, rgba(16, 93, 177, .22) 100%),
    linear-gradient(135deg, #ffffff 0%, #ecf8ff 46%, #c6e9ff 100%);
}

.logo-wrap {
  position: relative;
  z-index: 5;
  width: min(92vw, 1280px);
  padding: clamp(22px, 4vw, 64px);
  border-radius: clamp(22px, 4vw, 58px);
  background: rgba(255, 255, 255, .44);
  border: 1px solid rgba(255, 255, 255, .72);
  box-shadow:
    0 30px 90px rgba(7, 55, 125, .14),
    inset 0 1px 0 rgba(255, 255, 255, .96);
  backdrop-filter: blur(12px);
  animation: floatLogo 7s ease-in-out infinite;
}

.logo {
  display: block;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 24px 38px rgba(8, 54, 120, .18));
}

.top-glow {
  position: absolute;
  top: -28%;
  left: 50%;
  width: 90vw;
  height: 52vh;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(255,255,255,.95), rgba(103,185,239,.25) 42%, transparent 70%);
  filter: blur(8px);
  z-index: 1;
}

.ice-grid {
  position: absolute;
  inset: 0;
  opacity: .25;
  z-index: 2;
  background-image:
    linear-gradient(rgba(12, 93, 174, .12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(12, 93, 174, .12) 1px, transparent 1px);
  background-size: 70px 70px;
  mask-image: radial-gradient(circle at center, transparent 0%, black 72%);
}

.wave {
  position: absolute;
  left: -10vw;
  right: -10vw;
  height: 26vh;
  border-radius: 50%;
  border-top: 2px solid rgba(255, 255, 255, .78);
  filter: blur(.2px);
  z-index: 3;
  pointer-events: none;
}

.wave-1 {
  bottom: 3vh;
  transform: rotate(-7deg);
  box-shadow: 0 -30px 70px rgba(22, 126, 217, .18);
  animation: waveMove 9s ease-in-out infinite;
}

.wave-2 {
  bottom: 12vh;
  transform: rotate(-4deg);
  opacity: .7;
  animation: waveMove 12s ease-in-out infinite reverse;
}

.wave-3 {
  bottom: -8vh;
  transform: rotate(-10deg);
  opacity: .55;
  animation: waveMove 15s ease-in-out infinite;
}

.snow {
  position: absolute;
  inset: -20%;
  z-index: 4;
  pointer-events: none;
  background-image:
    radial-gradient(circle, rgba(255,255,255,.95) 0 1px, transparent 2px),
    radial-gradient(circle, rgba(11,111,190,.18) 0 1px, transparent 2px);
  background-size: 90px 90px, 150px 150px;
  opacity: .45;
}

.snow-1 { animation: snowFall 18s linear infinite; }
.snow-2 { animation: snowFall 28s linear infinite reverse; opacity: .28; }
.snow-3 { animation: snowFall 38s linear infinite; opacity: .20; }

@keyframes floatLogo {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-14px) scale(1.01); }
}

@keyframes waveMove {
  0%, 100% { translate: 0 0; }
  50% { translate: 3vw -1.5vh; }
}

@keyframes snowFall {
  from { transform: translate3d(0, -6%, 0); }
  to { transform: translate3d(4%, 6%, 0); }
}

@media (max-width: 768px) {
  .hero {
    padding: 18px;
  }

  .logo-wrap {
    width: 96vw;
    padding: 18px;
    border-radius: 26px;
  }
}