body {
    margin: 0;
    padding: 0;
    font-family: sans-serif;
    background: linear-gradient(135deg, #ffcc00, #ff3300);
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
}

.container {
    text-align: center;
    animation: fadeIn 2s ease-in-out;
}

h1 {
    font-size: 3em;
    margin-bottom: 0.3em;
}

.subtitle {
    font-size: 1.2em;
    margin-bottom: 1em;
}

button {
    padding: 1em 2em;
    font-size: 1em;
    background-color: #fff;
    color: #ff3300;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s;
}

button:hover {
    transform: scale(1.05);
}

.popup {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
}

.popup.hidden {
    display: none;
}

.popup-content {
    background-color: #fff;
    color: #333;
    padding: 2em;
    border-radius: 12px;
    text-align: center;
    max-width: 90%;
    width: 400px;
    animation: slideDown 0.4s ease;
}

#closeBtn {
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 1.5em;
    cursor: pointer;
}

@keyframes fadeIn {
    from {opacity: 0;}
    to {opacity: 1;}
}

@keyframes slideDown {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}