* {
    box-sizing: border-box;
}

body {
    font-family: sans-serif;
}

main {
    clear: both;
    display: flex;
    flex-direction: column;
}

#logo {
    width: 40px;
    height: 40px;
    border: 1px solid deeppink;
    position: relative;
    left: 0;
    top: 0;
    float: left;
}

#name {
    width: 200px;
    height: 40px;
    position: relative;
    right: 0;
    top: 0;
    float: right;
    text-align: right;
}

.button {
    border: 2px solid deeppink;
    padding: 1ex 1em;
}

.calendar .dayFromNextMonth, .calendar .dayFromPreviousMonth {
    background: silver;
}

.calendar .holiday {
    color: red;
}

.calendar td {
    border: 3px solid transparent;
    padding: 0.5ex;
}
.calendar .today {
    font-weight: bold;
    border-color: blue;
    border-radius: 50%;
}

button {
    border: 2px solid deeppink;
}