body {
    font-family: Arial, sans-serif;
    background: url("images/background.jpg") no-repeat center center fixed;
    background-size: cover;
    margin: 0;
    padding: 0;
    color: #333;
}

/* Bloc principal */
.container {
    max-width: 800px;
    margin: 30px auto;
    background: rgba(255, 255, 255, 0.85); /* fond blanc semi-transparent */
    padding: 20px 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

h1, h2 {
    text-align: center;
    color: #222;
}

form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

input, button {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 16px;
}

button {
    background: #4caf50;
    color: white;
    cursor: pointer;
    border: none;
}

button:hover {
    background: #45a049;
}

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

table {
    width: 100%;
    border-collapse: collapse;
    margin: 15px 0;
    background: rgba(255,255,255,0.9); /* table aussi un peu transparente */
}

table th, table td {
    border: 1px solid #ddd;
    padding: 8px;
    text-align: center;
}}