* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #000;
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
}

body {
  position: relative;
  color: white;
}

#startScreen {
  position: fixed;
  inset: 0;
  z-index: 20;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 1s ease;
}

#startScreen.hidden {
  opacity: 0;
  pointer-events: none;
}

.tap-text {
  font-size: 1rem;
  letter-spacing: 0.3em;
  opacity: 0.7;
  animation: pulse 2s ease-in-out infinite;
}

.slideshow {
  position: fixed;
  inset: 0;
  z-index: 1;
}

.slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transform: scale(1.06);
  transition: opacity 2s ease, transform 6s ease;
}

.slide.active {
  opacity: 1;
  transform: scale(1);
}

.overlay {
  position: fixed;
  inset: 0;
  z-index: 2;
  background: linear-gradient(to top, rgba(0,0,0,.65), rgba(0,0,0,.15) 40%, rgba(0,0,0,.35));
}

#musicToggle {
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 5;
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 50%;
  background: rgba(255,255,255,.14);
  color: #fff;
  font-size: 1rem;
  backdrop-filter: blur(8px);
  cursor: pointer;
}

.content {
  position: fixed;
  left: 50%;
  bottom: 48px;
  transform: translateX(-50%);
  z-index: 4;
  width: calc(100% - 32px);
  max-width: 520px;
  text-align: center;
  padding: 18px 16px;
  border-radius: 24px;
  background: rgba(255,255,255,.08);
  backdrop-filter: blur(14px);
  opacity: 0;
  animation: fadeUp 1.6s ease forwards;
  animation-delay: .6s;
}

.content h1 {
  font-size: clamp(1.7rem, 5vw, 2.4rem);
  font-weight: 500;
}

.content p {
  margin-top: 6px;
  font-size: .95rem;
  opacity: .88;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translate(-50%,16px);
  }
  to {
    opacity: 1;
    transform: translate(-50%,0);
  }
}

@keyframes pulse {
  0%,100% { opacity:.35; }
  50% { opacity:.85; }
}