body {
    font-family: sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f6f8;
    color: #222;
}

header {
    background-color: #1f4b99;
    color: white;
    padding: 16px 24px;
}

header h1 {
    margin: 0;
    font-size: 24px;
}

nav {
    margin-top: 8px;
}

nav a {
    color: white;
    text-decoration: none;
    margin-right: 16px;
}

nav a:hover {
    text-decoration: underline;
}

nav form {
    display: inline;
    margin: 0;
    padding: 0;
}

nav .nav-button {
    background: none;
    border: none;
    color: white;
    text-decoration: none;
    margin-right: 16px;
    padding: 0;
    border-radius: 0;
    cursor: pointer;
    font: inherit;
}

nav .nav-button:hover {
    text-decoration: underline;
    background: none;
}

main {
    max-width: 1000px;
    margin: 24px auto;
    background-color: white;
    padding: 24px;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}

h2 {
    margin-top: 40px;
    margin-bottom: 12px;
}

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

th, td {
    border: 1px solid #d0d7de;
    padding: 8px 10px;
    text-align: left;
    vertical-align: top;
}

th {
    background-color: #f0f4f8;
    width: 240px;
}

button {
    background-color: #1f4b99;
    color: white;
    border: none;
    padding: 10px 16px;
    border-radius: 4px;
    cursor: pointer;
}

button:hover {
    background-color: #163a78;
}

a {
    color: #1f4b99;
}

.message-error {
    color: #b00020;
    margin-bottom: 16px;
}

.actions {
    margin-top: 20px;
}

.form-help {
    font-size: 0.9em;
    color: #555;
    margin-top: 4px;
}