* {
    padding: 0;
    margin: 0;
}

html, body {
    height: 100%;
}
body {
    background-color: #7f7f7f;
}
.center-box {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translateX(-50%) translateY(-50%);
    width: 80%;
    max-width: 380px;
    padding: 40px 30px;
    background-color: #fff;
    border-radius: 10px;
}
.title {
    text-align: center;
    margin-bottom: 20px;
    font-size: 20px;
    font-weight: bold;
}
.btn {
    line-height: 44px;
    background-color: #7ac23c;
    border-radius: 10px;
    text-align: center;
    color: #fff;
}
.click {
    cursor: pointer;
    transition: all 0.3s;
}

.click:active {
    transform: scale(1.05);
}