:root {
  color-scheme: light;
  font-family: Arial, Helvetica, sans-serif;
  color: #12243d;
  background: radial-gradient(ellipse at 50% 36%, #fff 0%, #f8f9fa 50%, #edf2f5 100%);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  place-items: center;
}
main {
  width: min(1100px, 92vw);
  padding: clamp(24px, 5vh, 68px) 20px;
  text-align: center;
}
.logo {
  display: block;
  width: min(780px, 78vw);
  max-width: 100%;
  max-height: 36vh;
  height: auto;
  object-fit: contain;
  margin: 0 auto;
}
.line {
  width: 76px;
  height: 2px;
  margin: clamp(20px, 4vh, 44px) auto 26px;
  background: #087cae;
  opacity: .65;
  border-radius: 4px;
}
.category {
  margin: 0;
  color: #176b97;
  font-size: clamp(15px, 1.7vw, 22px);
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
}
h1 {
  margin: clamp(24px, 4vh, 44px) 0 0;
  font-size: clamp(24px, 3.2vw, 43px);
  line-height: 1.25;
  font-weight: 400;
  letter-spacing: .012em;
}
.farewell {
  max-width: 34rem;
  margin: 18px auto 0;
  color: #637485;
  font-size: clamp(16px, 2vw, 20px);
  line-height: 1.5;
}
.foot {
  position: fixed;
  bottom: clamp(20px, 4vh, 42px);
  left: 12px;
  right: 12px;
  margin: 0;
  color: #637485;
  font-size: clamp(12px, 1.2vw, 15px);
}
.dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 9px;
  border-radius: 50%;
  background: #0c81b3;
  vertical-align: 2px;
  animation: pulse 2.5s ease-in-out infinite;
}
video {
  display: block;
  width: min(100%, 900px);
  max-height: 60vh;
  margin: 24px auto 0;
  background: #111;
  border-radius: 12px;
}
.download {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 20px;
  border-radius: 8px;
  background: #176b97;
  color: #fff;
  font-weight: 600;
}
[hidden] { display: none; }
@keyframes pulse { 0%, 100% { opacity: .35; } 50% { opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .dot { animation: none; } }
@media (max-height: 580px) {
  main { padding: 12px; }
  .logo { max-height: 29vh; }
  .line { margin: 14px auto; }
  h1 { margin-top: 15px; }
  .foot { position: static; margin: 24px 0 0; }
}