/* Preloader Styles */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #003366;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease-in-out, visibility 0.5s ease-in-out;
}

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

.spinner {
    width: 60px;
    height: 60px;
    border: 5px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #ffffff;
    animation: spin 1s ease-in-out infinite;
    position: relative;
}

.spinner::before,
.spinner::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
}

.spinner::before {
    width: 80px;
    height: 80px;
    border: 5px solid transparent;
    border-top-color: rgba(255, 255, 255, 0.5);
    animation: spin 2s linear infinite;
}

.spinner::after {
    width: 40px;
    height: 40px;
    border: 5px solid transparent;
    border-top-color: rgba(255, 255, 255, 0.7);
    animation: spin 1.5s linear infinite reverse;
}

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

/* Animación de logo para preloader */
.preloader-logo {
    position: absolute;
    width: 100px;
    height: 100px;
    animation: pulse 1.5s ease-in-out infinite alternate;
}

@keyframes pulse {
    0% {
        transform: scale(0.8);
        opacity: 0.7;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}