/* Design 5: Dark Pulse — radar/sonar concentric ring pulse */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@100;200;300;400;700&family=Source+Code+Pro:wght@300;400&display=swap');

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

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  background: #08080d;
  color: #fff;
  font-family: 'Inter', sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}

/* Pulse Rings */
.pulse-container {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 0;
}

.pulse-ring {
  position: absolute;
  border: 1px solid rgba(0, 180, 255, 0.15);
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: pulseExpand 10s ease-out infinite;
}

.pulse-ring:nth-child(1) { animation-delay: 0s; }
.pulse-ring:nth-child(2) { animation-delay: 2.5s; }
.pulse-ring:nth-child(3) { animation-delay: 5s; }
.pulse-ring:nth-child(4) { animation-delay: 7.5s; }

@keyframes pulseExpand {
  0% {
    width: 40px;
    height: 40px;
    opacity: 0.6;
    border-color: rgba(0, 180, 255, 0.4);
  }
  100% {
    width: 1200px;
    height: 1200px;
    opacity: 0;
    border-color: rgba(0, 180, 255, 0);
  }
}

/* Static rings for texture */
.static-ring {
  position: absolute;
  border: 1px solid rgba(255, 255, 255, 0.03);
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.static-ring:nth-child(5) { width: 250px; height: 250px; }
.static-ring:nth-child(6) { width: 450px; height: 450px; }
.static-ring:nth-child(7) { width: 700px; height: 700px; }
.static-ring:nth-child(8) { width: 950px; height: 950px; }

/* Content */
.content {
  position: relative;
  z-index: 10;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.6rem;
}

/* Logo */
.logo {
  width: 90px;
  opacity: 0.4;
  animation: fadeIn 2s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 0.4; }
}

/* Product Name */
.product-name {
  font-size: 5.5rem;
  font-weight: 100;
  letter-spacing: 0.5em;
  padding-left: 0.5em;
  color: #fff;
  animation: revealName 2.5s ease-out 0.3s both;
}

@keyframes revealName {
  from { opacity: 0; letter-spacing: 1.5em; padding-left: 1.5em; }
  to { opacity: 1; letter-spacing: 0.5em; padding-left: 0.5em; }
}

/* Subtitle */
.subtitle {
  font-family: 'Source Code Pro', monospace;
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.45em;
  color: rgba(0, 180, 255, 0.85);
  text-transform: uppercase;
  text-shadow: 0 0 20px rgba(0, 180, 255, 0.3);
  animation: fadeSlideUp 1.5s ease-out 1s both;
}

@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Thin separator */
.separator {
  width: 1px;
  height: 40px;
  background: linear-gradient(180deg, transparent, rgba(0, 180, 255, 0.3), transparent);
  animation: fadeSlideUp 1.5s ease-out 1.3s both;
}

/* Status text */
.status {
  font-size: 0.8rem;
  font-weight: 300;
  letter-spacing: 0.5em;
  color: rgba(255, 255, 255, 0.6);
  text-transform: uppercase;
  text-shadow: 0 0 15px rgba(255, 255, 255, 0.1);
  animation: fadeSlideUp 1.5s ease-out 1.5s both;
}

/* CTA Button */
.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 36px;
  border: 1px solid rgba(0, 180, 255, 0.25);
  border-radius: 50px;
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-family: 'Source Code Pro', monospace;
  font-size: 0.75rem;
  font-weight: 300;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  transition: all 0.5s ease;
  animation: fadeSlideUp 1.5s ease-out 1.8s both;
}

.cta-button .arrow {
  transition: transform 0.3s ease;
  font-size: 0.9rem;
}

.cta-button:hover {
  border-color: rgba(0, 180, 255, 0.6);
  color: #fff;
  background: rgba(0, 180, 255, 0.06);
  box-shadow: 0 0 40px rgba(0, 180, 255, 0.1);
}

.cta-button:hover .arrow {
  transform: translateX(4px);
}

/* Footer */
.footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 10;
  text-align: center;
  padding: 1.5rem;
  font-size: 0.65rem;
  font-weight: 200;
  color: rgba(255, 255, 255, 0.15);
  letter-spacing: 0.1em;
}