:root {
  --bg-deep: #071821;
  --bg-mid: #0d2a38;
  --ice: #b8e8f5;
  --ice-bright: #e8f9ff;
  --accent: #3ec4e0;
  --accent-deep: #1a8fad;
  --text: #f3fbff;
  --muted: rgba(232, 249, 255, 0.72);
  --line: rgba(184, 232, 245, 0.28);
  --font-display: "Bebas Neue", sans-serif;
  --font-body: "Manrope", sans-serif;
}

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

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

body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg-deep);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 2rem 1.25rem 2.5rem;
  overflow: hidden;
  background:
    radial-gradient(ellipse 90% 70% at 50% 0%, rgba(62, 196, 224, 0.22), transparent 55%),
    radial-gradient(ellipse 60% 50% at 80% 90%, rgba(26, 143, 173, 0.18), transparent 50%),
    linear-gradient(165deg, #0a2230 0%, var(--bg-deep) 45%, #051018 100%);
}

.hero__glow {
  position: absolute;
  inset: auto auto 10% 50%;
  width: min(70vw, 520px);
  height: min(70vw, 520px);
  transform: translateX(-50%);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(62, 196, 224, 0.2), transparent 65%);
  filter: blur(10px);
  animation: pulse 6s ease-in-out infinite;
  pointer-events: none;
}

.hero__frost {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(232, 249, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(232, 249, 255, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 45%, #000 20%, transparent 75%);
  pointer-events: none;
  animation: drift 18s linear infinite;
}

.stage {
  position: relative;
  z-index: 1;
  width: min(100%, 420px);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.brand {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(5.5rem, 18vw, 8.5rem);
  letter-spacing: 0.12em;
  line-height: 0.85;
  color: var(--ice-bright);
  text-shadow: 0 0 40px rgba(62, 196, 224, 0.35);
  animation: rise 0.9s ease-out both;
}

.headline {
  margin: 1.1rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 5.5vw, 2.35rem);
  letter-spacing: 0.04em;
  font-weight: 400;
  color: var(--ice);
  animation: rise 0.9s ease-out 0.12s both;
}

.lead {
  margin: 0.75rem 0 0;
  max-width: 28ch;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--muted);
  animation: rise 0.9s ease-out 0.22s both;
}

.buy-btn {
  margin-top: 2.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: min(100%, 280px);
  padding: 1.05rem 2rem;
  border: 1px solid rgba(184, 232, 245, 0.45);
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-deep) 100%);
  color: #041018;
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
  box-shadow: 0 12px 36px rgba(26, 143, 173, 0.35);
  animation: rise 0.9s ease-out 0.34s both;
}

.buy-btn:hover {
  transform: translateY(-2px);
  filter: brightness(1.06);
  box-shadow: 0 16px 42px rgba(26, 143, 173, 0.45);
}

.buy-btn:active {
  transform: translateY(0);
}

.contacts {
  margin-top: 1.75rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.85rem 1.35rem;
  animation: rise 0.9s ease-out 0.46s both;
}

.contact {
  position: relative;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0.01em;
  transition: color 0.2s ease;
}

.contact::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 100%;
  height: 1px;
  background: var(--line);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.contact:hover {
  color: var(--ice-bright);
}

.contact:hover::after {
  transform: scaleX(1);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.55;
    transform: translateX(-50%) scale(1);
  }
  50% {
    opacity: 0.9;
    transform: translateX(-50%) scale(1.06);
  }
}

@keyframes drift {
  from {
    background-position: 0 0;
  }
  to {
    background-position: 48px 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .brand,
  .headline,
  .lead,
  .buy-btn,
  .contacts,
  .hero__glow,
  .hero__frost {
    animation: none;
  }
}