styles.css

table {
    border-collapse: collapse;
    width: 100%;
}

table td {
    border: 1px solid black;
    padding: 8px;
    text-align: center;
}

#head-container {
    display: flex;
    align-content: center;
    justify-content: space-between;
}

#head-container img {
    order: 1;
    max-width: 20%;
    height: auto;
}

#head-container h1 {
    order: 2;
    text-align: center;
    margin: 5%;
}

#head-container button {
    order: 3;
    width: 10vw;
    height: 5vh;
    margin: 5%;
}

#head-container img {
    width: 15vw;
}

div > h1 {
    color: navy;
}

#body-container {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    position: relative;
}

#body-container table {
    width: 92%;
    margin: 4% auto;
}

table caption {
    text-align: left;
    font-weight: bold;
    padding: 3%;
}

#body-container > button {
    position: absolute;
    bottom: 0;
    right: 5%;
}

.merged-cell {
    text-align: right;
}

.icon-button img {
    width: 24px;
    height: 24px;
}

td input {
    flex: 1;
    width: 3vw;
    text-align: center;
}