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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #000000;
  color: #ffffff;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.screen {
  width: 100%;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
  animation: fadeIn 0.6s ease-out;
}

.screen.hidden {
  display: none;
}

.content {
  max-width: 400px;
  width: 100%;
  text-align: center;
}

.title {
  font-size: 64px;
  font-weight: 700;
  letter-spacing: -3px;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #ffffff 0%, #666666 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: slideDown 0.6s ease-out;
}

.subtitle {
  font-size: 18px;
  color: #666666;
  font-weight: 500;
  margin-bottom: 32px;
  animation: slideDown 0.7s ease-out;
}

.divider {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, transparent, #333333, transparent);
  margin: 0 auto 32px;
  animation: expand 0.8s ease-out;
}

.description {
  font-size: 15px;
  color: #999999;
  line-height: 1.6;
  margin-bottom: 40px;
  animation: fadeIn 0.9s ease-out;
}

.platforms {
  display: flex;
  gap: 12px;
  justify-content: center;
  animation: fadeIn 1s ease-out;
}

.platform-badge {
  padding: 8px 20px;
  background: #111111;
  border: 1px solid #222222;
  border-radius: 20px;
  font-size: 13px;
  color: #666666;
  font-weight: 500;
}

.install-guide {
  margin-top: 40px;
  animation: fadeIn 0.8s ease-out;
}

.install-guide.hidden {
  display: none;
}

.step {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
  text-align: left;
  padding: 20px;
  background: #0a0a0a;
  border: 1px solid #1a1a1a;
  border-radius: 12px;
  transition: all 0.3s ease;
}

.step:hover {
  border-color: #222222;
  transform: translateX(4px);
}

.step-number {
  width: 32px;
  height: 32px;
  background: #111111;
  border: 1px solid #222222;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  color: #666666;
  flex-shrink: 0;
}

.step p {
  font-size: 14px;
  color: #999999;
  line-height: 1.5;
}

.step strong {
  color: #ffffff;
  font-weight: 600;
}

.btn-install {
  width: 100%;
  padding: 16px;
  background: #ffffff;
  color: #000000;
  border: none;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 32px;
  transition: all 0.3s ease;
}

.btn-install:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 255, 255, 0.2);
}

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

.loader {
  text-align: center;
}

.loader-text {
  font-size: 48px;
  font-weight: 700;
  letter-spacing: -2px;
  background: linear-gradient(135deg, #ffffff 0%, #666666 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeInScale 0.8s ease-out;
}

.loader-dot {
  display: inline-block;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes expand {
  from {
    width: 0;
    opacity: 0;
  }
  to {
    width: 60px;
    opacity: 1;
  }
}

@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.3;
  }
}

@media (max-width: 480px) {
  .title {
    font-size: 48px;
  }
  
  .step {
    padding: 16px;
  }
}