* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
        }
        
        .login-container {
            background: white;
            border-radius: 20px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
            width: 100%;
            max-width: 450px;
            overflow: hidden;
        }
        
        .login-header {
            background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
            color: white;
            padding: 40px 30px;
            text-align: center;
        }
        
        .login-header h1 {
            font-size: 2.2em;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 15px;
        }
        
        .login-header p {
            opacity: 0.9;
            font-size: 1.1em;
        }
        
        .login-form {
            padding: 40px 30px;
        }
        
        .form-group {
            margin-bottom: 25px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: #2c3e50;
            font-weight: 600;
            font-size: 1em;
        }
        
        .form-group input {
            width: 100%;
            padding: 15px 20px;
            border: 2px solid #e1e5e9;
            border-radius: 10px;
            font-size: 16px;
            transition: all 0.3s ease;
            background: #f8f9fa;
        }
        
        .form-group input:focus {
            outline: none;
            border-color: #3498db;
            background: white;
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
        }
        
        .error-message {
            background: #fee;
            color: #c0392b;
            padding: 15px;
            border-radius: 10px;
            margin-bottom: 25px;
            border-left: 4px solid #c0392b;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .error-message:before {
            content: "⚠️";
        }
        
        .btn-login {
            background: linear-gradient(135deg, #27ae60 0%, #2ecc71 100%);
            color: white;
            border: none;
            padding: 18px;
            width: 100%;
            border-radius: 10px;
            font-size: 18px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }
        
        .btn-login:hover {
            transform: translateY(-2px);
            box-shadow: 0 7px 20px rgba(46, 204, 113, 0.3);
        }
        
        .btn-login:active {
            transform: translateY(0);
        }
        
        .form-footer {
            text-align: center;
            margin-top: 25px;
            padding-top: 20px;
            border-top: 1px solid #eee;
            color: #7f8c8d;
            font-size: 0.9em;
        }
        
        .back-to-site {
            display: inline-block;
            margin-top: 15px;
            color: #3498db;
            text-decoration: none;
            font-weight: 500;
        }
        
        .back-to-site:hover {
            text-decoration: underline;
        }
        
        /* Animation pour les messages d'erreur */
        @keyframes shake {
            0%, 100% {transform: translateX(0);}
            10%, 30%, 50%, 70%, 90% {transform: translateX(-5px);}
            20%, 40%, 60%, 80% {transform: translateX(5px);}
        }
        
        .shake {
            animation: shake 0.5s;
        }
        
        /* Responsive */
        @media (max-width: 480px) {
            .login-container {
                border-radius: 15px;
            }
            
            .login-header {
                padding: 30px 20px;
            }
            
            .login-header h1 {
                font-size: 1.8em;
            }
            
            .login-form {
                padding: 30px 20px;
            }
            
            .form-group input {
                padding: 12px 15px;
            }
            
            .btn-login {
                padding: 15px;
            }
        }
        
        /* Style pour le mot de passe */
        .password-container {
            position: relative;
        }
        
        .toggle-password {
            position: absolute;
            right: 15px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            cursor: pointer;
            color: #7f8c8d;
            font-size: 1.2em;
        }