body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: #f4f7f6;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
        }

        .login-container {
            background-color: #ffffff;
            padding: 40px;
            border-radius: 10px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
            width: 100%;
            max-width: 400px;
            text-align: center;
        }

        h1 { color: #333; margin-bottom: 10px; }

        .welcome-text {
            color: #666;
            font-size: 0.9rem;
            margin-bottom: 25px;
            line-height: 1.5;
        }

        .error-mensaje {
            background-color: #ffebee;
            color: #c62828;
            padding: 10px;
            border-radius: 5px;
            margin-bottom: 20px;
            font-size: 0.9rem;
            border: 1px solid #ef9a9a;
        }

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

        input {
            padding: 12px;
            margin-bottom: 15px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 1rem;
            transition: border-color 0.3s;
        }

        input:focus { outline: none; border-color: #007bff; }

        button {
            padding: 12px;
            background-color: #007bff;
            color: white;
            border: none;
            border-radius: 5px;
            font-size: 1rem;
            cursor: pointer;
            transition: background-color 0.3s;
        }

        button:hover { background-color: #0056b3; }

        .footer-link {
            margin-top: 20px;
            font-size: 0.9rem;
            color: #666;
        }

        .footer-link a {
            color: #007bff;
            text-decoration: none;
            font-weight: bold;
        }

        .footer-link a:hover { text-decoration: underline; }