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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: 'Verdana', Geneva, sans-serif;
}

.video-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
}

.video-bg video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.video-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.52);
}

.stage {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.card {
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 2rem;
  padding: 3.5rem 4rem;
  max-width: 560px;
  width: 100%;
  text-align: center;
  color: #fff;
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.35),
    inset 0 1px 0 rgba(255,255,255,0.15);
  animation: fadeUp 0.9s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

.card h1 {
  font-weight: 300;
  font-size: clamp(2.2rem, 5vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
  color: rgb(147, 130, 246);
}

.card p {
  font-weight: 300;
  font-size: 0.95rem;
  line-height: 1.75;
  color: rgba(255,255,255,0.72);
  margin-bottom: 1rem;
}

.card .btn {
  display: inline-block;
  font-weight: 300;
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  text-decoration: none;
  color: rgb(147, 130, 246);
  border: 1px solid rgba(255,255,255,0.45);
  border-radius: 999px;
  padding: 0.7rem 2rem;
  transition: background 0.25s, border-color 0.25s;
}

.card .btn:hover {
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.8);
}

.autoplay-hint {
  position: fixed;
  top: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  background: rgba(255, 255,255, 0.08);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  color: rgb(147, 130, 246);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  padding: 0.55rem 1.25rem;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.15);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s;
}

.autoplay-hint.visible {
  opacity: 1;
}

.buttons {
  display: flex;
  justify-self: center;
  text-align: center;
  justify-content: center;
  gap: 20px;
}