* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: url("../images/bg.jpg");
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
        }
        
        .container {
            background: white;
            border-radius: 10px;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
            width: 100%;
            max-width: 400px;
            padding: 40px;
            animation: slideIn 0.5s ease-out;
        }
        
        @keyframes slideIn {
            from {
                opacity: 0;
                transform: translateY(-20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        h1 {
            text-align: center;
            color: #333;
            margin-bottom: 30px;
            font-size: 28px;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        label {
            display: block;
            margin-bottom: 8px;
            color: #555;
            font-weight: 500;
        }
        
        input[type="text"],
        input[type="password"] {
            width: 100%;
            padding: 12px;
            border: 2px solid #ddd;
            border-radius: 5px;
            font-size: 14px;
            transition: border-color 0.3s;
        }
        
        input[type="text"]:focus,
        input[type="password"]:focus {
            outline: none;
            border-color: #667eea;
        }
        
        .erro {
            background-color: #f8d7da;
            color: #721c24;
            padding: 12px;
            border-radius: 5px;
            margin-bottom: 20px;
            border: 1px solid #f5c6cb;
            animation: shake 0.5s;
        }
        
        @keyframes shake {
            0%, 100% { transform: translateX(0); }
            25% { transform: translateX(-10px); }
            75% { transform: translateX(10px); }
        }
        
        button {
            width: 100%;
            padding: 12px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            border-radius: 5px;
            font-size: 16px;
            font-weight: bold;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        
        button:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
        }
        
        button:active {
            transform: translateY(0);
        }
        
        @media (max-width: 480px) {
            .container {
                padding: 30px 20px;
            }
            
            h1 {
                font-size: 24px;
            }
        }