/* --- Body --- */
body {
    font-family: 'Segoe UI', Roboto, Arial, sans-serif;
    background-color: #f3f0f9;
    color: #333;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center; /* CENTRAGE VERTICAL */
}

/* --- Header fixe violet --- */
nav {
    background: linear-gradient(135deg, #6a11cb, #8e2de2);
    color: #fff;
    padding: 15px 30px;
    display: flex;
    justify-content: flex-start; /* Accueil à gauche */
    align-items: center;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    z-index: 1000;
}

nav a {
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
}

nav a:hover {
    opacity: 0.8;
}

/* --- Conteneur du formulaire et du titre --- */
.login-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-top: 80px; /* espace pour nav fixe */
}

/* --- Titre Connexion --- */
.login-container h1 {
    color: #5b1dbb;
    margin-bottom: 30px;
    text-align: center;
}

/* --- Formulaire centré --- */
form {
    display: flex;
    flex-direction: column;
    gap: 15px;
    background: #fff;
    padding: 40px 30px;
    border-radius: 10px;
    border: 1px solid #e0d4f7;
    box-shadow: 0 3px 6px rgba(0,0,0,0.08);
    width: 90%;
    max-width: 400px;
    text-align: center;
}

/* --- Inputs --- */
form input[type="text"],
form input[type="password"] {
    padding: 12px 15px;
    border: 1px solid #dcd0f5;
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

form input[type="text"]:focus,
form input[type="password"]:focus {
    outline: none;
    border-color: #8e2de2;
    box-shadow: 0 0 5px rgba(142,45,226,0.5);
}

/* --- Bouton Se connecter --- */
form button {
    padding: 12px;
    background: linear-gradient(135deg, #6a11cb, #8e2de2);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.2s ease;
}

form button:hover {
    background: linear-gradient(135deg, #8e2de2, #6a11cb);
    transform: translateY(-2px);
}

/* --- Footer violet --- */
footer {
    background: #6a11cb;
    color: #fff;
    text-align: center;
    padding: 15px 0;
    width: 100%;
    box-shadow: 0 -2px 5px rgba(0,0,0,0.2);
    font-size: 0.95rem;
    position: fixed;
    bottom: 0;
}