index.css

body {
    margin: 0;
}

.container {
    margin: auto;
    width: 50%;
    height: 100%;
    display: flex;
    flex-direction: row;
    justify-content: center;
}

.schedule {
    width: 100%;
    height: 20%;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

.header {
    height: 30px;
    width: 100%;
    background: transparent;
    margin-bottom: 5px;
    display: flex;
    flex-direction: row;
}

.header h3 {
    margin: 0;
    text-align: center;
    vertical-align: middle;
    position: relative;
    top: 50%;
    font-family: Montserrat;
    font-size: 1em;
    font-weight: 100;
    transform: translateY(-50%);
    user-select: none;
}

.align-block {
    width: 100%;
    height: 100%;
    background: transparent;
}

.header-item {
    width: 100%;
    height: 100%;
    margin: 2px;
}

.days-wrapper {
    width: 100%;
    height: 500px;
    background: transparent;
    display: flex;
    flex-direction: row;
    justify-content: flex-start;
    position: relative;
}

.hour-header {
    display: flex;
    flex-direction: column;
    margin: 2px;
    background: transparent;
    width: 100%;
}

.hour-header-item {
    width: 100%;
    height: 100%;
    border: 1px white;
    border-style: solid;
}

.hour-header-item h5 {
    color: black;
    margin: 0;
    text-align: right;
    vertical-align: middle;
    position: relative;
    top: 50%;
    font-family: Montserrat;
    font-size: 1em;
    font-weight: 100;
    transform: translateY(-50%);
    padding-right: 10%;
    user-select: none;
}

.day {
    display: flex;
    flex-direction: column;
    margin: 1px;
    background: transparent;
    width: 100%;
}

.hour {
    background: #dddddd;
    margin-bottom: 2px;
    width: 100%;
    height: 100%;
    user-select: none;
}

.hover {
    background: #727bad;
}

.disabled {
    pointer-events: none;
    opacity: 0.3;
    box-shadow: none;
}

.selected {
    background: #9aa7ee;
}