:root {
    --primary: #2c3e50;
    --secondary: #3498db;
    --accent: #e74c3c;
    --light: #ecf0f1;
    --dark: #2c3e50;
    --shadow: 0 4px 6px rgba(0,0,0,0.1);
    --radius: 8px;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
}

/* Navigation */
.zone-navigation {
    background-color: var(--primary);
    padding: 1rem 2rem;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    list-style: none;
    gap: 1.5rem;
}

.navbar-link {
    color: white;
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    transition: var(--transition);
}

.navbar-link:hover,
.navbar-link.active {
    background-color: var(--secondary);
}

/* Formulaire */
.form-container {
    background-color: white;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

.form-control {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 16px;
    background-color: white;
}

.form-row {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.form-row > div {
    flex: 1;
}

.btn {
    background-color: #2c3e50;
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 5px;
    font-weight: bold;
    cursor: pointer;
    width: 100%;
    font-size: 16px;
    transition: background-color 0.3s;
    margin: 15px 0;
}

.btn:hover {
    background-color: #3498db;
}

.btn-cancel {
    background-color: #ccc;
    color: #333;
}

.btn-cancel:hover {
    background-color: #aaa;
}

/* Footer */
.zone-pied {
    background-color: var(--dark);
    color: white;
    padding: 3rem 2rem 1rem;
    margin-top: 3rem;
}

/* Guide utilisateur */
#start-tutorial {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #3b6e93;
    color: white;
    padding: 12px 20px;
    border: none;
    border-radius: 30px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    z-index: 9999;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
    transition: background 0.3s;
}

#start-tutorial:hover {
    background: #508bbb;
}

/* Responsive */
@media (max-width: 768px) {
    .form-row {
        flex-direction: column;
        gap: 0;
    }
}