:root {
            --bg-color: #121212;
            --card-bg: #1E1E1E;
            --text-color: #E0E0E0;
            --primary-color: #3498db;
            --secondary-color: #2980b9;
            --accent-color: #34495e;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: var(--bg-color);
            color: var(--text-color);
            margin: 0;
            padding: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
        }

        .container {
            background-color: var(--card-bg);
            border-radius: 15px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            padding: 30px;
            width: 90%;
            max-width: 500px;
            position: relative;
        }

        h1 {
            color: var(--primary-color);
            text-align: center;
            margin-bottom: 30px;
            font-size: 28px;
            font-weight: 600;
        }

        .input-group {
            margin-bottom: 25px;
            position: relative;
        }

        label {
            display: block;
            margin-bottom: 8px;
            color: var(--text-color);
            font-weight: 500;
        }

        textarea, select {
            width: 100%;
            padding: 12px;
            background-color: var(--accent-color);
            border: none;
            border-radius: 8px;
            color: var(--text-color);
            font-size: 16px;
            transition: all 0.3s ease;
        }

        textarea:focus, select:focus {
            outline: none;
            box-shadow: 0 0 0 2px var(--primary-color);
        }

        .switch-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            background-color: var(--accent-color);
            border-radius: 25px;
            padding: 5px;
            margin-bottom: 25px;
        }

        .switch-option {
            flex: 1;
            text-align: center;
            padding: 10px;
            cursor: pointer;
            border-radius: 20px;
            transition: all 0.3s ease;
        }

        .switch-option.active {
            background-color: var(--primary-color);
            color: var(--bg-color);
        }

        button {
            background-color: var(--primary-color);
            color: var(--bg-color);
            border: none;
            padding: 12px 20px;
            text-align: center;
            text-decoration: none;
            display: inline-block;
            font-size: 16px;
            margin: 4px 2px;
            cursor: pointer;
            border-radius: 8px;
            transition: background-color 0.3s;
            width: 100%;
            font-weight: 600;
        }

        button:hover {
            background-color: var(--secondary-color);
        }

        #resultado {
            margin-top: 25px;
            padding: 15px;
            border-radius: 8px;
            background-color: var(--accent-color);
            min-height: 100px;
        }

        .icon {
            margin-right: 8px;
        }

        .update-icon {
            position: absolute;
            top: 15px;
            right: 15px;
            cursor: pointer;
            font-size: 24px;
            color: var(--primary-color);
        }

        .icon-button {
            background: none;
            border: none;
            color: var(--primary-color);
            font-size: 24px;
            cursor: pointer;
            padding: 5px;
            position: absolute;
            right: 10px;
            top: 50%;
            transform: translateY(-50%);
        }

        .result-actions {
            display: flex;
            justify-content: flex-end;
            margin-top: 15px;
        }

        .btn-copy {
            background: none;
            border: none;
            color: var(--primary-color);
            font-size: 24px;
            cursor: pointer;
            padding: 5px;
        }

        .modal {
            display: none;
            position: fixed;
            z-index: 1;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            overflow: auto;
            background-color: rgba(0,0,0,0.4);
        }

        .modal-content {
            background-color: var(--card-bg);
            margin: 15% auto;
            padding: 20px;
            border: 1px solid var(--accent-color);
            width: 80%;
            max-width: 500px;
            border-radius: 15px;
            color: var(--text-color);
        }

        .close {
            color: var(--text-color);
            float: right;
            font-size: 28px;
            font-weight: bold;
        }

        .close:hover,
        .close:focus {
            color: var(--primary-color);
            text-decoration: none;
            cursor: pointer;
        }