html, body {
    margin: 0;
    height: 100%;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: Helvetica;
    background-image: linear-gradient(to right bottom, #1a2026, #2b343c, #3e4954, #525f6d, #667687);
}

.container {
    background-color: white;
    width: 280px;
    padding: 30px 20px;
}

.title {
    font-size: 20px;
    text-align: center;
    margin-bottom: 15px;
    
}

.login_box {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    align-items: center;

}

.login_box span {
    font-size: 14px;
    margin-bottom: 10px;
    color: red;
}

.input_box {
    width: 100%;
    margin-bottom: 10px;
}


.input_box > input {
    float: left;
    width: calc(100% - 30px);
    height: 30px;
    border: 0;
    background-color: #D6D6D6;
    margin-top: 10px;
    font-size: 14px;
    padding: 5px 15px;
}

.submit_box button {
    border: 0;
    background-color: darkred;
    height: 35px;
    width: 100%;
    font-size: 14px;
    color: white;
    cursor: pointer;
}

.submit_box button:hover {
    background-color: #373737;
}

.submit_box {
    width: 100%;
    margin-top: 10px;
}