* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html,
body {
  height: 100%;
  width: 100%;
  background: #0a0a0a;
  font-family: 'Segoe UI', 'Roboto', Arial, sans-serif;
  color: #fff;
  overflow: hidden;
}
.video-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
.video-bg video {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: auto;
  height: 100vh;
  min-width: 100vw;
  min-height: 100vh;
  object-fit: cover;
  filter: blur(8px) brightness(0.7) grayscale(0.2);
  transition: filter 0.3s;
  z-index: -1;
}
@media (max-width: 900px) {
  .video-bg video {
    width: 100vw;
    height: 100vh;
    min-width: unset;
    min-height: unset;
    filter: blur(2px) brightness(0.7) grayscale(0.2);
  }
}
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(10, 10, 20, 0.25);
  backdrop-filter: blur(4px);
  z-index: 0;
  display: contents;
}
.content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
  text-align: center;
  background: rgba(0,0,0,0.35);
  padding: 2.5rem 2.5rem 2rem 2.5rem;
  border-radius: 18px;
  box-shadow: 0 0 40px 0 rgba(0,0,0,0.4);
  max-width: 90vw;
}
h1 {
  font-size: 3.2em;
  letter-spacing: 4px;
  text-transform: uppercase;
  font-weight: 800;
  margin-bottom: 0.5em;
  text-shadow: 0 2px 16px #000a;
}
h2 {
  font-size: 1.5em;
  font-weight: 400;
  margin-bottom: 1.5em;
  text-shadow: 0 1px 8px #0008;
}
.cta-btn {
  display: inline-block;
  padding: 0.9em 2.2em;
  font-size: 1.1em;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(90deg, #ff512f 0%, #dd2476 100%);
  border: none;
  border-radius: 30px;
  box-shadow: 0 2px 12px 0 #0006;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
  margin-top: 0.5em;
}
.cta-btn:hover {
  background: linear-gradient(90deg, #dd2476 0%, #ff512f 100%);
  transform: scale(1.04);
}
.mute-btn {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 10;
  background: rgba(0,0,0,0.6);
  border: none;
  border-radius: 50%;
  width: 54px;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 2px 12px 0 #0008;
  transition: background 0.2s;
}
.mute-btn svg {
  width: 28px;
  height: 28px;
  fill: #fff;
}
.mute-btn:hover {
  background: rgba(255, 81, 47, 0.7);
}
.secondary-line {
  font-size: 1.05em;
  font-style: italic;
  color: #e0e0e0;
  margin-top: 0.7em;
  opacity: 0.85;
}
@media (max-width: 900px) {
  .content {
    padding: 1.5rem 1rem 1.2rem 1rem;
  }
  h1 {
    font-size: 2.1em;
  }
  h2 {
    font-size: 1.1em;
  }
}
@media (max-width: 600px) {
  .content {
    padding: 1.1rem 0.5rem 0.8rem 0.5rem;
  }
  h1 {
    font-size: 1.3em;
  }
  h2 {
    font-size: 0.9em;
  }
  .mute-btn {
    width: 40px;
    height: 40px;
    bottom: 16px;
    right: 16px;
  }
  .mute-btn svg {
    width: 20px;
    height: 20px;
  }
} 
/* ------------- Transition ------------------ */
#intro-transition {
  position: fixed;
  top: 0; left: 0; width: 100vw; height: 100vh;
  background: rgba(0,0,0,0.85);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  pointer-events: all;
  transition: opacity 2.5s;
}
body.transition-finished #intro-transition {
  opacity: 0;
  pointer-events: none;
}
#intro-transition .intro-silence {
  color: #fff;
  font-size: 2.5em;
  letter-spacing: 0.2em;
  opacity: 0.7;
  animation: silence-blink 1.2s steps(1, end) infinite alternate;
}
@keyframes silence-blink {
  0% { opacity: 0.7; }
  100% { opacity: 0.2; }
}