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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #05050a;
  color: #eafcff;
}

#bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  display: block;
}

.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.glass-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 56px 60px;
  border-radius: 24px;
  background: rgba(10, 14, 26, 0.7);
  backdrop-filter: blur(2px) saturate(160%);
  -webkit-backdrop-filter: blur(2px) saturate(160%);
  border: 1px solid rgba(0, 255, 240, 0.25);
  box-shadow:
    0 0 0 1px rgba(255, 0, 200, 0.08) inset,
    0 20px 60px rgba(0, 0, 0, 0.6),
    0 0 60px rgba(0, 255, 240, 0.08);
  animation: rise 0.9s ease-out;
}

.glass-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: 24px;
  padding: 1px;
  background: linear-gradient(135deg, rgba(0,255,240,0.6), rgba(255,0,200,0.5), rgba(0,255,240,0.6));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0.6;
  animation: borderShift 6s linear infinite;
}

.badge {
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: #00fff0;
  border: 1px solid rgba(0, 255, 240, 0.4);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 24px;
  text-shadow: 0 0 8px rgba(0, 255, 240, 0.6);
}

h1 {
  font-size: 2.6rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  margin-bottom: 12px;
  background: linear-gradient(90deg, #00fff0, #ff00c8);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 30px rgba(0, 255, 240, 0.35);
}

.accent {
  color: #ff00c8;
  -webkit-text-fill-color: #ff00c8;
  animation: blink 1.2s steps(1) infinite;
}

.tagline {
  font-size: 1rem;
  color: #8fb3bd;
  margin-bottom: 40px;
  max-width: 320px;
}

.download-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 44px;
  color: #05050a;
  background: linear-gradient(135deg, #00fff0, #ff00c8);
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.02em;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(0, 255, 240, 0.35);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.download-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 50px rgba(255, 0, 200, 0.45);
}

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

.btn-glow {
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent, rgba(255,255,255,0.5), transparent);
  transform: translateX(-100%);
  animation: sweep 2.5s ease-in-out infinite;
}

.btn-text {
  position: relative;
  z-index: 1;
}

.hint {
  margin-top: 18px;
  font-size: 0.8rem;
  color: #5a7480;
}

@keyframes blink {
  50% { opacity: 0.2; }
}

@keyframes sweep {
  0% { transform: translateX(-120%); }
  60%, 100% { transform: translateX(120%); }
}

@keyframes borderShift {
  0% { filter: hue-rotate(0deg); }
  100% { filter: hue-rotate(360deg); }
}

@keyframes rise {
  from { opacity: 0; transform: translateY(24px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}