/* Style pour les pages d'authentification (login et register) */
        
        body {
            margin: 0;
            padding: 0;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            background-color: #F4F9FD;
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .auth-container {
            background-color: white;
            padding: 50px 60px;
            border-radius: 20px;
            box-shadow: 0 6px 20px rgba(81, 78, 243, 0.3);
            width: 100%;
            max-width: 450px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .auth-container:hover {
            box-shadow: 0 15px 50px rgba(81, 78, 243, 0.25);
        }

        h1 {
            color: #3F8CFF;
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 10px;
            text-align: center;
        }

        .subtitle {
            color: #6c757d;
            text-align: center;
            margin-bottom: 40px;
            font-size: 14px;
        }

        .error {
            background-color: #f8d7da;
            color: #721c24;
            padding: 12px 20px;
            border-radius: 10px;
            margin-bottom: 25px;
            text-align: center;
            font-size: 14px;
            border: 1px solid #f5c6cb;
            animation: shake 0.5s;
        }

        @keyframes shake {
            0%, 100% { transform: translateX(0); }
            25% { transform: translateX(-10px); }
            75% { transform: translateX(10px); }
        }

        form {
            display: flex;
            flex-direction: column;
        }

        form > div {
            margin-bottom: 25px;
        }

        label {
            display: block;
            color: #2c3e50;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        input[type="text"],
        input[type="email"],
        input[type="password"] {
            width: 100%;
            height: 50px;
            padding: 0 20px;
            border: 2px solid #EAEEF4;
            border-radius: 12px;
            font-size: 16px;
            background-color: #EEF6FB;
            transition: all 0.3s ease;
            box-sizing: border-box;
        }

        input[type="text"]:focus,
        input[type="email"]:focus,
        input[type="password"]:focus {
            outline: none;
            border-color: #3F8CFF;
            background-color: white;
            box-shadow: 0 0 0 4px rgba(81, 78, 243, 0.1);
        }

        input[type="text"]::placeholder,
        input[type="email"]::placeholder,
        input[type="password"]::placeholder {
            color: #a0aec0;
        }

        button[type="submit"] {
            width: 100%;
            height: 55px;
            background: linear-gradient(135deg, #3F8CFF 0%, #3F8CFF 100%);
            color: white;
            border: none;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            margin-top: 10px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(81, 78, 243, 0.3);
        }

        button[type="submit"]:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(81, 78, 243, 0.4);
            background: linear-gradient(135deg, #3F8CFF 0%, #3F8CFF 100%);
        }

        button[type="submit"]:active {
            transform: translateY(-1px);
        }

        .auth-link {
            text-align: center;
            margin-top: 30px;
            color: #6c757d;
            font-size: 14px;
        }

        .auth-link a {
            color: #3F8CFF;
            text-decoration: none;
            font-weight: 600;
            transition: color 0.3s ease;
        }

        .auth-link a:hover {
            color: #3F8CFF;
            text-decoration: underline;
        }

        /* Logo ou décoration optionnelle */
        .logo-placeholder {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, #3F8CFF 0%, #3F8CFF 100%);
            border-radius: 20px;
            margin: 0 auto 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 36px;
            font-weight: bold;
            box-shadow: 0 6px 20px rgba(81, 78, 243, 0.3);
        }

        /* Animation d'entrée */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .auth-container {
            animation: fadeInUp 0.6s ease;
        }

        /* Responsive */
        @media (max-width: 600px) {
            .auth-container {
                padding: 40px 30px;
                margin: 20px;
            }

            h1 {
                font-size: 28px;
            }
        }