main {
    font-size: 16px;
}

h1 {
    font-size: 20px;
}

h2 {
    font-size: 16px;
}

form {
    margin: 0;
    display: flex;
    align-items: center;
    margin-bottom: 8px;
}

textarea {
    width: 800px;
    height: 6rem;
    resize: vertical;
    margin-right: 4px;
}

button {
  margin-left: 4px;
  height: 1.2rem;
}

section {
    margin-top: 32px;
    border-bottom: 1px solid #ccc;
}

input {
    margin-right: 4px;
    height: 1.2rem;
}

input[type=text] {
    width: 3rem;
    text-align: center;
}

input[type=file] {
    height: 1.5rem;
}

nav {
    margin-top: 24px;
    margin-bottom: 24px;
}

nav a {
    margin-right: 12px;
    padding: 8px;
    color: black;
    background-color: #ccc;
    text-decoration: none;
}

@media (max-width: 725px) {
    nav a {
        display: block;
        margin-bottom: 8px;
    }
}

a:hover {
    background-color: #aaa;
    text-decoration: underline;

}

table {
    border-collapse: collapse;
    width: 100%;
    column-rule-style: dot-dot-dash;
}

thead {
    padding: 0 4px;
    background-color: lightgray;
    border: black 1px solid;
}

tr {
    border: black 1px solid;
}

td {
    padding: 4px 8px;
    text-align: center;
}

.error {
    color: red;
}