* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    color: #333;
}

h1 {
    background-color: #2c3e50;
    color: white;
    padding: 20px;
    text-align: center;
}

nav {
    background-color: #34495e;
    padding: 10px 20px;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: bold;
}

nav a:hover {
    color: #f39c12;
}

main {
    max-width: 900px;
    margin: 30px auto;
    padding: 20px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

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

th,
td {
    padding: 10px 15px;
    border: 1px solid #ddd;
    text-align: left;
}

th {
    background-color: #2c3e50;
    color: white;
}

tr:nth-child(even) {
    background-color: #f9f9f9;
}

tr:hover {
    background-color: #eaf0fb;
}

form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

input,
textarea {
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1rem;
}

button {
    padding: 10px;
    background-color: #2c3e50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

button:hover {
    background-color: #f39c12;
}

a {
    color: #2c3e50;
    text-decoration: none;
}

a:hover {
    color: #f39c12;
}

.btn-retour {
    display: inline-block;
    margin-top: 20px;
    padding: 8px 16px;
    background-color: #2c3e50;
    color: white;
    border-radius: 4px;
}

.btn-retour:hover {
    background-color: #f39c12;
    color: white;
}