body {
    background-size: cover;
    background-color: rgb(101, 93, 105);
    overscroll-behavior: none;
}

.container {
    position: relative;
    width: 480px;
    margin: auto;
    text-align: start;
    height: 850px;
}

.content {
    position: absolute;
    width: 100%;
    top: 62.8%;
    left: 8%;
}

.header {
    width: 100%;
}

.register-btn {
    border: none;
    margin: none;
    padding: none;
    cursor: pointer;
    background: none;
    width: 300px;
    height: 93px;
    transition: transform .08s ease-out, filter .08s ease-out;
}

.register-btn:active {
    transform: translateY(4px);
    filter: brightness(0.95);
}

.register-btn img {
    width: 100%;
    height: 100%;
}

/* Popup Style */
.popup {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    visibility: hidden;
}

.popup.show {
    visibility: visible;
}

.popup-content {
    background: white;
    padding: 25px;
    border-radius: 12px;
    text-align: center;
    width: 280px;
    font-family: sans-serif;
    animation: popupScale 0.2s ease;
}

.popup-content button {
    margin-top: 15px;
    padding: 10px 20px;
    border: none;
    background: #4CAF50;
    color: white;
    border-radius: 8px;
    cursor: pointer;
}

@keyframes popupScale {
    from {
        transform: scale(0.8);
        opacity: 0;
    }

    to {
        transform: scale(1);
        opacity: 1;
    }
}