/* iOS-style Preloader */
.preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(1, 1, 1, 0.98);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 99999;
  opacity: 1;
  visibility: visible;
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.preloader--hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.preloader__spinner {
  width: 50px;
  height: 50px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

@keyframes preloader-spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* Альтернативный вариант - более минималистичный */
.preloader__spinner--minimal {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(255, 255, 255, 0.2);
  border-top-color: rgba(255, 255, 255, 0.9);
  border-radius: 50%;
  animation: preloader-spin 0.8s linear infinite;
}

/* Вариант с точками (iOS Safari style) */
.preloader__dots {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: center;
}

.preloader__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.8);
  animation: preloader-bounce 1.2s ease-in-out infinite both;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

.preloader__dot:nth-child(1) {
  animation-delay: -0.24s;
}

.preloader__dot:nth-child(2) {
  animation-delay: -0.12s;
}

.preloader__dot:nth-child(3) {
  animation-delay: 0s;
}

@keyframes preloader-bounce {
  0%, 80%, 100% {
    transform: scale(0.85) translateY(0);
    opacity: 0.6;
  }
  40% {
    transform: scale(1.15) translateY(-8px);
    opacity: 1;
  }
}

/* Плавное появление контента после загрузки */
body.preloader-active {
  overflow: hidden;
}

body.preloader-active main,
body.preloader-active section {
  opacity: 0;
  transition: opacity 0.3s ease-in;
}

body:not(.preloader-active) main,
body:not(.preloader-active) section {
  opacity: 1;
}