* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

body {
    height: 100vh;
    background: linear-gradient(135deg, #4e73df, #1cc88a);
}

.top-buttons {
    position: absolute;
    top: 20px;
    right: 30px;
}

.top-buttons button {
    padding: 8px 15px;
    margin-left: 8px;
    cursor: pointer;
}

.center-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 28px;
    font-weight: bold;
}

.bottom-left {
    position: absolute;
    bottom: 15px;
    left: 20px;
    cursor: pointer;
}

.bottom-right {
    position: absolute;
    bottom: 15px;
    right: 20px;
    cursor: pointer;
}

.screen {
    display: none;
    height: 100vh;
    justify-content: center;
    align-items: center;
}

.container {
    width: 320px;
    padding: 25px;
    border: 1px solid #ccc;
    border-radius: 8px;
    background: white;
    text-align: center;
}

input {
    width: 100%;
    padding: 10px;
    margin-top: 10px;
}

.error {
    color: red;
    font-size: 12px;
    height: 14px;
    text-align: left;
}

.back-btn {
    margin-top: 10px;
    cursor: pointer;
    color: blue;
    font-size: 12px;
}

.ascreen {
    background: linear-gradient(135deg, #4e73df, #1cc88a);
    animation: pop  1s infinite alternate;
}

@keyframes pop {
    from {
        transform: scale(1);
    }

    to {
        transform: scale(1.2);
    }
}