/* Прелоадер */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-color, #f8f9fa);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 99999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.preloader-content {
    text-align: center;
}

.preloader-spinner {
    width: 50px;
    height: 50px;
    margin: 0 auto;
    position: relative;
}

.preloader-spinner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 50%;
    border: 3px solid var(--border-color, #dee2e6);
    border-top-color: var(--accent-color, #212529);
    animation: spin 1s linear infinite;
}

/* Анимации */
@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* Плавная загрузка контента */
.page-content {
    opacity: 0;
    animation: fadeIn 0.5s ease 0.3s forwards;
}

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

/* Адаптивность */
@media (max-width: 480px) {
    .preloader-spinner {
        width: 40px;
        height: 40px;
    }
    
    .preloader-spinner::before {
        border-width: 2px;
    }
}