* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    background-color: #282828;    
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: Arial, sans-serif;
    transition: background 0.5s ease;
}
.loader-container {
    text-align: center;
    color: white;
}
.loader {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(255, 255, 255, 0.3);
    border-top: 5px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}
.countdown {
    font-size: 18px;
    margin-top: 10px;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}