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

html, body {
    height: 100%;
}

body {
    font-family: system-ui, -apple-system, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: #333;
    background: #fafafa;
}

/* HEADER ET NAVIGATION */
header {
    background: #fff;
    border-bottom: 1px solid #ddd;
    padding: 20px;
    position: sticky;
    top: 0;
    z-index: 200;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
}

h2 {
    font-size: 18px;
    margin-bottom: 15px;
}

nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0;
}

nav > ul > li {
    position: relative;
}

nav > ul > li > a {
    display: block;
    padding: 10px 18px;
    text-decoration: none;
    color: #333;
    border-bottom: 2px solid transparent;
    transition: border-color 0.2s, background 0.2s;
}

nav > ul > li > a:hover{
    border-bottom-color: #0066cc;
    background: #f5f5f5;
}


nav > ul > li > a.active {
    border-bottom-color: #0066cc;
    background: #dddddd;
}
/* SOUS-MENU */
nav ul ul {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    flex-direction: column;
    background: #fff;
    border: 1px solid #ddd;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    min-width: 200px;
    z-index: 100;
}

nav li:hover > ul {
    display: flex;
}

nav ul ul li {
    width: 100%;
}

nav ul ul a {
    display: block;
    padding: 10px 18px;
    text-decoration: none;
    color: #333;
    border: none;
    transition: background 0.2s;
}

nav ul ul a:hover {
    background: #f5f5f5;
}

/* MAIN CONTAINER */
main {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
}

/* FORMULAIRE */
form {
    background: #fff;
    border: 1px solid #ddd;
    padding: 40px;
    border-radius: 4px;
    max-width: 600px;
    margin: 0 auto;
}

h1 {
    font-size: 24px;
    margin-bottom: 8px;
    color: #222;
}

.step-indicator {
    font-size: 12px;
    color: #999;
    margin-bottom: 25px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 13px;
    color: #555;
}

input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 3px;
    font-size: 14px;
    transition: border-color 0.2s;
}

input:focus {
    outline: none;
    border-color: #0066cc;
    box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.1);
}

.field-with-error input {
    border-color: #d32f2f;
}

.error-message {
    color: #d32f2f;
    font-size: 12px;
    margin-top: 4px;
    display: block;
}

button {
    width: 100%;
    padding: 12px;
    background: #0066cc;
    color: white;
    border: none;
    border-radius: 3px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

button:hover {
    background: #0052a3;
}

button:active {
    opacity: 0.95;
}

/* INFO BOX ÉTAPE 2 */
.info-box {
    background: #f9f9f9;
    border-left: 3px solid #0066cc;
    padding: 15px;
    margin-bottom: 25px;
    font-size: 13px;
    border-radius: 2px;
}

.info-box p {
    margin: 8px 0;
}

.info-label {
    font-weight: 600;
    color: #222;
}

/* MESSAGE SUCCÈS */
.success-message {
    background: #e8f5e9;
    color: #2e7d32;
    padding: 15px;
    border-radius: 3px;
    margin-bottom: 20px;
    font-size: 13px;
    border: 1px solid #c8e6c9;
}

a {
    color: #0066cc;
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: #0052a3;
}

/* RESPONSIVE */
@media (max-width: 768px) {
    header {
        padding: 15px;
    }

    .header-content {
        max-width: 100%;
    }

    h2 {
        font-size: 16px;
        margin-bottom: 12px;
    }

    nav > ul > li > a {
        padding: 8px 12px;
        font-size: 13px;
    }

    nav ul ul {
        min-width: 150px;
    }

    nav ul ul a {
        padding: 8px 12px;
        font-size: 13px;
    }

    main {
        margin: 20px auto;
    }

    form {
        padding: 25px;
        max-width: 100%;
    }

    h1 {
        font-size: 20px;
    }

    input, button {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    header {
        padding: 12px;
    }

    h2 {
        font-size: 14px;
        margin-bottom: 10px;
    }

    nav > ul {
        gap: 0;
    }

    nav > ul > li > a {
        padding: 6px 10px;
        font-size: 12px;
    }

    main {
        padding: 0 10px;
    }

    form {
        padding: 15px;
    }

    h1 {
        font-size: 18px;
    }

    .step-indicator {
        margin-bottom: 15px;
    }

    .form-group {
        margin-bottom: 15px;
    }

    input, button {
        font-size: 16px;
        padding: 10px;
    }
}