body {
    font-family: Arial, sans-serif;
    margin: 0;
    background: #f4f4f4;
}

header {
    background: #1f2937;
    color: white;
    padding: 20px;
}

header h1 {
    margin: 0 0 10px 0;
}

nav a {
    color: white;
    text-decoration: none;
    margin-right: 15px;
}

main {
    padding: 30px;
}

form {
    background: white;
    padding: 20px;
    max-width: 600px;
    border-radius: 8px;
    box-shadow: 0 0 8px rgba(0,0,0,0.08);
}

input, select, textarea, button {
    width: 100%;
    padding: 10px;
    margin-top: 6px;
    margin-bottom: 15px;
    box-sizing: border-box;
}

button {
    background: #2563eb;
    color: white;
    border: none;
    cursor: pointer;
}

button:hover {
    background: #1d4ed8;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    margin-top: 20px;
}

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

.success {
    color: green;
    font-weight: bold;
}

.error {
    color: red;
    font-weight: bold;
}

.card {
    background: white;
    padding: 20px;
    border-radius: 8px;
}