#upe-preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 999999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.4s ease;
}
.upe-preloader-content {
    text-align: center;
}
/* Spinner */
.upe-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid #3498db;
    border-radius: 50%;
    animation: upe-spin 1s linear infinite;
    display: inline-block;
}
/* Pulse */
.upe-pulse {
    width: 50px;
    height: 50px;
    background-color: #3498db;
    border-radius: 50%;
    animation: upe-pulse 1.2s infinite;
}
/* Progress bar */
.upe-progress-bar {
    width: 250px;
    background-color: #e0e0e0;
    border-radius: 25px;
    overflow: hidden;
    height: 8px;
}
.upe-progress-fill {
    width: 0%;
    height: 100%;
    background-color: #3498db;
    animation: upe-progressAnim 1.5s infinite ease-in-out;
}
/* Logo */
.upe-logo {
    max-width: 120px;
    max-height: 120px;
    animation: upe-pulse 1.5s infinite;
}
/* Simple text */
.upe-simple {
    font-size: 18px;
    font-family: sans-serif;
    color: #333;
}
/* Keyframes */
@keyframes upe-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
@keyframes upe-pulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.7; }
    100% { transform: scale(1); opacity: 1; }
}
@keyframes upe-progressAnim {
    0% { width: 10%; }
    50% { width: 80%; }
    100% { width: 10%; }
}