body {
    font-family: "Roboto";
}

.main {
    margin-left: auto;
    margin-right: auto;
    width: 30em;
    margin-top: 5em;
}

.header {
    font-size: 1.4em;
    margin-bottom: 1em;
}

.float-left {
    float: left;
}

.calendar {
    clear: left;
}

button {
    border-style: none;
    font-size: 1.6em;
    border-radius: 4px;
    margin-right: 6px;
    outline: none;
}

button:hover {
    background-color: #B7CA56;
}

td {
    height: 4em;
    border-radius: 4px;
    padding-top: 0.3em;
    padding-right: 1em;
    padding-bottom: 1em;
    background-color: #DAE7E4;
}

td.weekend {
    background-color: #B7CA56;
}

td.other-month {
    color: gray;
}

.spinner {
    font-size: 1.6em;
}

body {
    font-family: "Roboto";
}

.main {
    margin-left: auto;
    margin-right: auto;
    width: 30em;
    margin-top: 5em;
}

.header {
    font-size: 1.4em;
    margin-bottom: 1em;
    padding-left: 2px;
}

.navigation {
    padding-left: 2px;
}

.float-left {
    float: left;
}

.calendar {
    clear: left;
}

button {
    border-style: none;
    font-size: 1.6em;
    border-radius: 4px;
    margin-right: 6px;
    outline: none;
}

button:hover {
    background-color: #B7CA56;
}

td {
    height: 4em;
    border-radius: 4px;
    padding-top: 0.3em;
    padding-right: 1em;
    padding-bottom: 1em;
    background-color: #DAE7E4;
}

td.weekend {
    background-color: #B7CA56;
}

td.other-month {
    color: gray;
}

.spinner {
    font-size: 1.6em;
}

Align header and navigation with table cells.
Align header and navigation with table cells.
