* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
  background: #020403;
  color: #dff7f7;
}
body { overflow-x: hidden; }

.hero {
  position: relative;
  min-height: 100vh;
  background:
    linear-gradient(rgba(1,8,8,0.28), rgba(1,8,8,0.42)),
    url('hero.jpg') center/cover no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.overlay {
  position: relative;
  z-index: 5;
  text-align: center;
  background: rgba(0, 12, 12, 0.18);
  border: 1px solid rgba(170,255,255,0.10);
  padding: 32px 28px;
  border-radius: 18px;
  backdrop-filter: blur(8px);
  box-shadow: 0 0 40px rgba(90, 220, 220, 0.08);
}

.logo {
  width: 112px;
  height: 112px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 18px;
  box-shadow: 0 0 28px rgba(180,255,255,0.14);
  transition: transform 0.2s ease;
}

h1 {
  margin: 0;
  letter-spacing: 0.32em;
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
}

p {
  margin-top: 10px;
  margin-bottom: 0;
  opacity: 0.84;
  font-size: 1rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

#particles {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

.particle {
  position: absolute;
  border-radius: 999px;
  background: rgba(205,255,255,0.55);
  box-shadow: 0 0 12px rgba(170,255,255,0.12);
  animation: floatUp linear infinite;
  opacity: 0;
}

@keyframes floatUp {
  0% { transform: translate3d(0, 18px, 0); opacity: 0; }
  10% { opacity: 0.35; }
  85% { opacity: 0.18; }
  100% { transform: translate3d(12px, -120px, 0); opacity: 0; }
}

.fog {
  position: absolute;
  inset: -10%;
  z-index: 1;
  pointer-events: none;
  opacity: 0.16;
  mix-blend-mode: screen;
  filter: blur(28px);
}

.fog-a {
  background:
    radial-gradient(circle at 20% 40%, rgba(210,255,255,0.25), transparent 26%),
    radial-gradient(circle at 70% 30%, rgba(180,240,240,0.18), transparent 22%),
    radial-gradient(circle at 50% 70%, rgba(220,255,255,0.16), transparent 24%);
  animation: driftA 24s ease-in-out infinite alternate;
}

.fog-b {
  background:
    radial-gradient(circle at 30% 60%, rgba(190,255,255,0.12), transparent 28%),
    radial-gradient(circle at 80% 55%, rgba(220,255,255,0.10), transparent 25%);
  animation: driftB 30s ease-in-out infinite alternate;
}

@keyframes driftA {
  from { transform: translateX(-1.5%) translateY(0%); }
  to   { transform: translateX(1.5%) translateY(-1.2%); }
}

@keyframes driftB {
  from { transform: translateX(1%) translateY(0.8%); }
  to   { transform: translateX(-1%) translateY(-0.8%); }
}

.ring-pulse {
  position: absolute;
  left: 50%;
  top: 50%;
  width: min(58vw, 620px);
  height: min(58vw, 620px);
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 1px solid rgba(210,255,255,0.12);
  box-shadow: 0 0 30px rgba(190,255,255,0.06);
  z-index: 3;
  pointer-events: none;
  animation: ringBreath 7.5s ease-in-out infinite;
}

@keyframes ringBreath {
  0%, 100% {
    transform: translate(-50%, -50%) scale(0.992);
    opacity: 0.16;
  }
  50% {
    transform: translate(-50%, -50%) scale(1.008);
    opacity: 0.24;
  }
}

.signals, .links, footer {
  background: #020403;
  text-align: center;
}

.signals {
  padding: 42px 20px 22px;
}

.signal {
  margin: 14px 0;
  opacity: 0.78;
  letter-spacing: 0.14em;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  padding: 10px 18px 42px;
}

.links a {
  color: #dff7f7;
  text-decoration: none;
  padding: 12px 16px;
  border: 1px solid rgba(170,255,255,0.14);
  border-radius: 999px;
  background: rgba(11, 26, 26, 0.55);
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.links a:hover {
  transform: translateY(-1px);
  border-color: rgba(170,255,255,0.32);
  background: rgba(15, 36, 36, 0.72);
  box-shadow: 0 0 18px rgba(120, 255, 255, 0.08);
}

footer {
  padding: 0 18px 44px;
  font-size: 0.82rem;
  line-height: 1.7;
  opacity: 0.56;
}

@media (max-width: 700px) {
  .overlay { padding: 24px 18px; }
  .logo { width: 92px; height: 92px; }
  .links { flex-direction: column; align-items: center; }
  .links a { width: min(92vw, 340px); }
  .ring-pulse {
    width: min(82vw, 520px);
    height: min(82vw, 520px);
  }
}