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compresorpdfnova
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<!DOCTYPE html>
<html lang="es">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Compresor PDF Pro</title>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/css/all.min.css">
    <link href="https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700;800&display=swap" rel="stylesheet">
    
    <style>
        /* --- VARIABLES DE ESTILO (Diseño Oscuro) --- */
        *, *::before, *::after { box-sizing: border-box; }
        :root {
            --bg-dark-blue: #141c30; 
            --card-dark-blue: #1e2945; 
            --accent-green: #00ffc0; 
            --text-light-gray: #e0e6f0; 
            --text-muted: #a0aec0; 
            --border-color: rgba(255, 255, 255, 0.1); 
            --shadow-elevated: 0 4px 8px rgba(0, 0, 0, 0.2), 0 6px 20px rgba(0, 0, 0, 0.15);
            --shadow-pressed: inset 2px 2px 5px rgba(0, 0, 0, 0.3), inset -2px -2px 5px rgba(255, 255, 255, 0.05);
            --danger-color: #e74c3c; 
            --success-color: #27ae60; 
            --error-color: #e74c3c;
            --highlight-color: #007bff; /* Azul para el compresor */
        }

        body {
            background-color: var(--bg-dark-blue); font-family: 'Poppins', sans-serif;
            display: flex; justify-content: center; align-items: center; min-height: 100vh;
            margin: 0; color: var(--text-light-gray); padding: 20px;
        }

        .container {
            width: 100%; max-width: 500px; background: var(--card-dark-blue); padding: 40px; 
            border-radius: 20px; box-shadow: var(--shadow-elevated); text-align: center;
            transition: transform 0.3s ease; border: 1px solid var(--border-color); 
        }

        h1 { font-weight: 800; font-size: 2.2rem; margin-bottom: 5px; color: var(--highlight-color); letter-spacing: 1.5px; }
        .subtitle { font-size: 0.95rem; color: var(--text-muted); margin-bottom: 25px; }

        .form-group { margin-bottom: 20px; text-align: left; }
        .form-label { display: block; font-size: 0.9rem; font-weight: 600; margin-bottom: 8px; color: var(--text-light-gray); }
        .form-input {
            width: 100%; padding: 12px 18px; border: 1px solid var(--border-color); border-radius: 12px;
            background: var(--bg-dark-blue); color: var(--text-light-gray); font-size: 1rem; outline: none;
            transition: all 0.2s ease; box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3); 
        }
        .form-input::placeholder { color: var(--text-muted); }
        .form-input:focus { border-color: var(--highlight-color); box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.3); }

        /* Estilo para el selector de calidad */
        select.form-input {
            -webkit-appearance: none;
            -moz-appearance: none;
            appearance: none;
            background-image: url("data:image/svg+xml;utf8,<svg fill='%23a0aec0' height='24' viewBox='0 0 24 24' width='24' xmlns='http://www.w3.org/2000/svg'><path d='M7 10l5 5 5-5z'/><path d='M0 0h24v24H0z' fill='none'/></svg>");
            background-repeat: no-repeat;
            background-position: right 10px top 50%;
            padding-right: 30px;
        }

        .file-upload-label { 
            display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 25px; border-radius: 12px; cursor: pointer; background: var(--bg-dark-blue); box-shadow: var(--shadow-elevated); transition: all 0.2s ease; margin-bottom: 15px; border: 1px dashed var(--highlight-color); /* Color azul */
        }
        .file-upload-label:hover { background: #253355; box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3); }
        .file-upload-icon { color: var(--highlight-color); font-size: 2.5rem; margin-bottom: 10px; }
        .file-upload-label p { margin: 0; font-weight: 600; }
        .file-input { display: none; }

        #submitBtn { 
            background: var(--highlight-color); border: none; padding: 15px; border-radius: 12px; 
            font-size: 1rem; font-weight: 700; width: 100%; cursor: pointer; transition: all 0.2s ease; 
            color: var(--bg-dark-blue); box-shadow: 0 5px 15px rgba(0, 123, 255, 0.4); /* Sombra azul */
            display: flex; align-items: center; justify-content: center; margin-bottom: 10px;
        }

        #submitBtn:hover { background: #0069d9; box-shadow: 0 8px 20px rgba(0, 123, 255, 0.5); }
        #submitBtn:active { box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.4); transform: translateY(1px); color: var(--bg-dark-blue); }
        #submitBtn:disabled { opacity: 0.4; cursor: not-allowed; background: var(--text-muted); box-shadow: none; }
        
        #statusMessage { margin-top: 20px; padding: 12px; border-radius: 12px; font-weight: 600; text-align: center; border: 1px solid; color: var(--text-light-gray); }
        .status-success { background: rgba(39, 174, 96, 0.2); border-color: var(--success-color); color: var(--success-color); }
        .status-error { background: rgba(231, 76, 60, 0.2); border-color: var(--error-color); color: var(--error-color); }
        .status-info { background: rgba(0, 123, 255, 0.2); border-color: var(--highlight-color); color: var(--highlight-color); }

        .spinner { border: 4px solid rgba(255, 255, 255, 0.1); border-top-color: var(--bg-dark-blue); border-right-color: var(--bg-dark-blue); border-bottom-color: var(--bg-dark-blue); border-left-color: var(--highlight-color); /* Spinner azul */ border-radius: 50%; width: 20px; height: 20px; animation: spin 1s linear infinite; }
        @keyframes spin { to { transform: rotate(360deg); } }
        .hidden { display: none !important; }

    </style>
</head>
<body>

    <div class="container">
        <h1>🗜️ Compresor PDF PRO 🗜️</h1>
        <p class="subtitle">Comprime tus PDF de forma agresiva usando Ghostscript.</p>
        <p style="font-size: 0.9em; color: var(--text-muted); margin-bottom: 30px;">
            *La compresión es fuerte. El tamaño final depende del contenido (imágenes) del PDF.
        </p>

        <form id="compressForm">
            
            <div class="form-group">
                <label for="qualitySelector" class="form-label">Nivel de Compresión (Perfil Ghostscript)</label>
                <div class="compression-slider-container" style="justify-content: space-between; gap: 0;">
                    <select id="qualitySelector" name="quality" class="form-input" style="width: 100%; box-shadow: none;">
                        <option value="ebook">Ebook (Buena compresión, calidad media)</option>
                        <option value="screen" selected>Screen (Alta compresión, baja calidad)</option>
                        <option value="printer">Printer (Baja compresión, alta calidad)</option>
                        <option value="prepress">Prepress (Mínima compresión, máxima calidad)</option>
                    </select>
                </div>
            </div>

            <label for="pdfFileInput" class="file-upload-label" style="border: 1px dashed var(--highlight-color);">
                <i class="file-upload-icon fas fa-file-upload" style="color: var(--highlight-color);"></i>
                <p>Haz clic para seleccionar el archivo PDF</p>
                <p id="fileNameDisplay" style="color: var(--text-muted); font-size: 0.85rem; margin-top: 5px !important;">Solo un archivo permitido (.pdf)</p>
            </label>
            <input type="file" id="pdfFileInput" name="pdf_file" accept="application/pdf" required class="file-input" onchange="displayFileName(this.files[0])">
            
            <button type="submit" id="submitBtn">
                <span id="buttonText">Comprimir y Descargar PDF</span>
                <div id="loadingSpinner" class="spinner hidden ml-3"></div>
            </button>
        </form>
        
        <div id="statusMessage" class="hidden"></div>
    </div>

    <script>
        const pdfFileInput = document.getElementById('pdfFileInput');
        const submitBtn = document.getElementById('submitBtn');
        const compressForm = document.getElementById('compressForm');
        const statusMessage = document.getElementById('statusMessage');
        const loadingSpinner = document.getElementById('loadingSpinner');
        const buttonText = document.getElementById('buttonText');
        const fileNameDisplay = document.getElementById('fileNameDisplay');
        const qualitySelector = document.getElementById('qualitySelector');

        function showStatus(message, type) { 
            statusMessage.textContent = message;
            statusMessage.classList.remove('hidden', 'status-error', 'status-success', 'status-info');
            
            if (type === 'error') {
                statusMessage.classList.add('status-error');
            } else if (type === 'success') {
                statusMessage.classList.add('status-success');
            } else if (type === 'info') {
                statusMessage.classList.add('status-info');
            }
        }

        function toggleLoading(isLoading) { 
            submitBtn.disabled = isLoading;
            if (isLoading) {
                buttonText.textContent = 'Comprimiendo...';
                loadingSpinner.classList.remove('hidden');
            } else {
                buttonText.textContent = 'Comprimir y Descargar PDF';
                loadingSpinner.classList.add('hidden');
            }
        }

        function displayFileName(file) {
            if (file) {
                fileNameDisplay.textContent = `${file.name} (${(file.size / 1024 / 1024).toFixed(2)} MB)`;
            } else {
                 fileNameDisplay.textContent = "Solo un archivo permitido (.pdf)";
            }
        }

        compressForm.addEventListener('submit', async (e) => {
            e.preventDefault();
            
            if (pdfFileInput.files.length === 0) { 
                showStatus('⚠️ Por favor, selecciona un archivo PDF.', 'error');
                return;
            }

            showStatus('⏳ Subiendo y comprimiendo PDF...', 'info');
            toggleLoading(true);

            const formData = new FormData(compressForm); 
            
            try {
                // Envía a la ruta /compress
                const response = await fetch('/compress', {
                    method: 'POST',
                    body: formData
                });

                if (response.ok) {
                    const blob = await response.blob();
                    const url = window.URL.createObjectURL(blob);
                    const a = document.createElement('a');
                    const originalName = pdfFileInput.files[0].name.replace('.pdf', '');
                    const selectedQuality = qualitySelector.options[qualitySelector.selectedIndex].text.split('(')[0].trim();
                    
                    a.style.display = 'none';
                    a.href = url;
                    a.download = `comp_${selectedQuality.toLowerCase().replace(/ /g, '_')}_${originalName}.pdf`; 
                    document.body.appendChild(a);
                    a.click();
                    window.URL.revokeObjectURL(url);
                    
                    showStatus('✅ Compresión exitosa. Descarga iniciada.', 'success');

                } else {
                    const errorText = await response.text();
                    showStatus(`❌ Error en la compresión: ${errorText}`, 'error');
                }
            } catch (error) {
                showStatus(`❌ Error de red: ${error.message}`, 'error');
            } finally {
                toggleLoading(false);
            }
        });

        document.addEventListener('DOMContentLoaded', () => {
             displayFileName(null);
        });
    </script>
</body>
</html>