body {
    background-image: url('https://gw.alipayobjects.com/zos/rmsportal/TVYTbAXWheQpRcWDaDMu.svg');
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: 'Roboto', sans-serif;
}

input {
    box-sizing: border-box;
    margin: 0;
    font-variant: tabular-nums;
    list-style: none;
    font-feature-settings: "tnum";
    position: relative;
    display: inline-block;
    width: 100%;
    height: 32px;
    padding: 4px 11px;
    color: rgba(0,0,0,.65);
    font-size: 14px;
    line-height: 1.5;
    background-color: #fff;
    background-image: none;
    border: 1px solid #d9d9d9;
    border-radius: 4px;
    transition: all .3s;
    margin-bottom: 1.5em;
}

button {
    color: #fff;
    background-color: #40a9ff;
    border-color: #40a9ff;
    height: 40px;
    padding: 0 15px;
    font-size: 16px;
    border-radius: 4px;
    line-height: 1.499;
    position: relative;
    display: inline-block;
    font-weight: 400;
    white-space: nowrap;
    text-align: center;
    background-image: none;
    box-shadow: 0 2px 0 rgba(0,0,0,.015);
    cursor: pointer;
    transition: all .3s cubic-bezier(.645,.045,.355,1);
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    border: 1px solid #d9d9d9;
}

.container {
    display: flex;
    align-items: center;
    flex-direction: column;
    justify-content: center;
    width: 18em;
    padding: 3em;
}

.login-form {
    display: flex;
    flex-direction: column;
    width: 100%;
}

.logo {
    width: 100%;
    margin-bottom: 1em;
}