#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    opacity: 1;
    transition: opacity 0.5s ease-in-out;
}

#preloader.fade-out {
    opacity: 0;
    pointer-events: none;
}

body.preloader-active {
    overflow: hidden;
}

#preloader img {
    max-width: 150px;
    margin-bottom: 20px;
}

.spinner {
    border: 8px solid #f3f3f3;
    border-top: 8px solid #333;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
}

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

.header {
    display: flex;
    align-items: center;
    padding: 10px;
}

.header img {
    max-width: 100px;
    margin-right: 20px;
}

.header .container {
    display: flex;
    align-items: center;
    width: 100%;
}

.nav ul {
    list-style: none;
    padding: 0;
    display: flex;
}

.nav ul li {
    margin-right: 15px;
}

.footer .contact-info-footer {
    margin-top: 10px;
    font-size: 0.9em;
    color: #666;
}

.main {}
.informacje-container {}