/* Grundlegende Einstellungen */
body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #ffffff;
    color: #333333;
    line-height: 1.6;
}

/* Kopfzeile */
header {
    background-color: #003366;
    color: #ffffff;
    padding: 20px 0;
    text-align: center;
}

header h1 {
    margin: 0;
    font-size: 2em;
}

/* Navigation */
nav {
    background-color: #0055a5;
    display: flex;
    justify-content: center;
}

nav a {
    color: #ffffff;
    padding: 14px 20px;
    text-decoration: none;
    display: block;
}

nav a:hover {
    background-color: #003366;
}

/* Hauptinhalt */
main {
    padding: 20px;
    max-width: 1200px;
    margin: auto;
}

/* Tabellen */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

table th, table td {
    border: 1px solid #dddddd;
    padding: 12px;
    text-align: left;
}

table th {
    background-color: #f2f2f2;
}

/* Buttons */
button {
    background-color: #0055a5;
    color: #ffffff;
    border: none;
    padding: 10px 16px;
    cursor: pointer;
    border-radius: 4px;
}

button:hover {
    background-color: #003366;
}

/* Formulare */
form input[type="email"],
form input[type="password"],
form input[type="text"],
form select {
    width: 100%;
    padding: 10px;
    margin: 8px 0 16px 0;
    border: 1px solid #cccccc;
    border-radius: 4px;
    box-sizing: border-box;
}

/* Fehlermeldungen */
.error {
    color: red;
    margin-top: 10px;
}

/* Fußzeile */
footer {
    background-color: #003366;
    color: #ffffff;
    text-align: center;
    padding: 10px 0;
    position: fixed;
    width: 100%;
    bottom: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
    }

    nav a {
        text-align: center;
        padding: 10px;
    }
}