body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

header {
    background-color: #282c34;
    color: white;
    padding: 1em;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    margin: 0;
}

button {
    padding: 0.5em 1em;
    margin: 0.5em;
    cursor: pointer;
    border: none;
    border-radius: 4px;
}

button:hover {
    opacity: 0.8;
}

main {
    padding: 2em;
}

form label {
    display: block;
    margin-bottom: 0.5em;
}

form input, form select, form textarea {
    width: 100%;
    padding: 0.5em;
    margin-top: 0.2em;
    box-sizing: border-box;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1em;
}

th, td {
    border: 1px solid #ddd;
    padding: 0.5em;
    text-align: center;
}

th {
    background-color: #f2f2f2;
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    right:0;
    bottom:0;
    background: rgba(0,0,0,0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background: white;
    padding: 2em;
    border-radius: 5px;
    position: relative;
    width: 90%;
    max-width: 500px;
}

.close-button {
    position: absolute;
    top: 1em;
    right: 1em;
    cursor: pointer;
    font-size: 1.5em;
}