body {
    font-family: 'Poppins', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f0f4f8;
    color: #333;
    text-align: center;
    overflow: hidden;
    background: linear-gradient(135deg, #181818, #222831, #30475e);
}

#loading-screen {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #1a1a2e;
    color: #ffffff;
    flex-direction: column;
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
}

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

.progress-bar {
    width: 100%;
    height: 5px;
    background-color: #e0e0e0;
    margin-top: 20px;
    position: relative;
    overflow: hidden;
}

.progress-bar::after {
    content: '';
    display: block;
    height: 100%;
    width: 0;
    background-color: #ffcc00;
    animation: loading 6s linear forwards;
}

@keyframes loading {
    0% { width: 0; }
    100% { width: 100%; }
}

.hidden {
    display: none;
}

.completely-hidden {
    visibility: hidden;
    position: absolute;
}

#main-content {
    padding: 40px;
    background: #ffffff;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    border-radius: 10px;
    max-width: 600px;
    margin: 50px auto;
}

#main-content h1 {
    color: #ff5733;
}

#main-content p {
    font-size: 16px;
    color: #444;
}

#go-back-button {
    background: #007BFF;
    color: white;
    border: none;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    margin-top: 20px;
    border-radius: 5px;
    transition: background 0.3s ease;
}

#go-back-button:hover {
    background: #0056b3;
}

#secret-message {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(135deg, #003638, #001c2e, #000814);
    color: #ffcc00;
    font-size: 20px;
}