Update index.html

index.html

@@ -14,77 +14,80 @@
 
         body {
             font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
-            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+            background: #2c3e50;
             min-height: 100vh;
-            padding: 20px;
+            padding: 0;
+            margin: 0;
         }
 
         .container {
-            max-width: 1400px;
-            margin: 0 auto;
+            height: 100vh;
+            display: flex;
+            flex-direction: column;
             background: white;
-            border-radius: 20px;
-            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
-            overflow: hidden;
         }
 
         .header {
             background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
-            padding: 30px;
+            padding: 12px 20px;
             color: white;
-            text-align: center;
+            display: flex;
+            justify-content: space-between;
+            align-items: center;
+            flex-shrink: 0;
         }
 
         .header h1 {
-            font-size: 2.5em;
-            margin-bottom: 10px;
-            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
+            font-size: 1.3em;
+            margin: 0;
         }
 
         .upload-section {
-            padding: 40px;
+            padding: 15px 20px;
             background: #f8f9fa;
-            border-bottom: 2px solid #e9ecef;
-            text-align: center;
+            border-bottom: 1px solid #dee2e6;
+            display: flex;
+            align-items: center;
+            gap: 15px;
+            flex-shrink: 0;
         }
 
         .upload-area {
-            border: 3px dashed #667eea;
-            border-radius: 15px;
-            padding: 60px 20px;
+            border: 2px dashed #667eea;
+            border-radius: 8px;
+            padding: 15px 25px;
             background: white;
-            transition: all 0.3s ease;
             cursor: pointer;
+            transition: all 0.2s ease;
+            flex: 1;
+            display: flex;
+            align-items: center;
+            gap: 10px;
         }
 
         .upload-area:hover {
             border-color: #764ba2;
             background: #f8f9ff;
-            transform: translateY(-5px);
-            box-shadow: 0 10px 30px rgba(102, 126, 234, 0.2);
         }
 
         .upload-area.dragover {
             border-color: #764ba2;
             background: #f0f0ff;
-            transform: scale(1.02);
         }
 
         .upload-icon {
-            font-size: 4em;
-            margin-bottom: 20px;
+            font-size: 1.5em;
         }
 
         .upload-text {
-            font-size: 1.3em;
+            font-size: 0.95em;
             color: #495057;
-            margin-bottom: 10px;
             font-weight: 600;
         }
 
         .upload-hint {
             color: #6c757d;
-            font-size: 1em;
+            font-size: 0.85em;
         }
 
         #fileInput {
@@ -92,28 +95,27 @@
         }
 
         .file-count {
-            margin-top: 20px;
-            padding: 15px 30px;
+            padding: 10px 20px;
             background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
             color: white;
-            border-radius: 30px;
-            display: inline-block;
+            border-radius: 20px;
             font-weight: bold;
-            font-size: 1.1em;
-            box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
+            font-size: 0.9em;
+            white-space: nowrap;
         }
 
         .tabs {
             display: flex;
             background: #f8f9fa;
-            padding: 0 20px;
+            padding: 0 10px;
             overflow-x: auto;
-            border-bottom: 3px solid #e9ecef;
-            gap: 5px;
+            border-bottom: 2px solid #dee2e6;
+            gap: 3px;
+            flex-shrink: 0;
         }
 
         .tabs::-webkit-scrollbar {
-            height: 8px;
+            height: 6px;
         }
 
         .tabs::-webkit-scrollbar-track {
@@ -122,24 +124,25 @@
 
         .tabs::-webkit-scrollbar-thumb {
             background: #667eea;
-            border-radius: 4px;
+            border-radius: 3px;
         }
 
         .tab {
-            padding: 15px 25px;
+            padding: 10px 15px;
             cursor: pointer;
             border: none;
             background: transparent;
             color: #6c757d;
-            font-weight: 600;
-            transition: all 0.3s ease;
+            font-weight: 500;
+            font-size: 0.85em;
+            transition: all 0.2s ease;
             white-space: nowrap;
             position: relative;
-            border-radius: 10px 10px 0 0;
-            margin-top: 5px;
+            border-radius: 8px 8px 0 0;
+            margin-top: 3px;
             display: flex;
             align-items: center;
-            gap: 8px;
+            gap: 6px;
         }
 
         .tab:hover {
@@ -150,23 +153,23 @@
         .tab.active {
             background: white;
             color: #667eea;
-            box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
         }
 
         .tab.active::after {
             content: '';
             position: absolute;
-            bottom: -3px;
+            bottom: -2px;
             left: 0;
             right: 0;
-            height: 3px;
+            height: 2px;
             background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
         }
 
         .close-tab {
-            margin-left: 8px;
+            margin-left: 5px;
             color: #dc3545;
             font-weight: bold;
+            font-size: 1.1em;
             opacity: 0.6;
             transition: opacity 0.2s;
         }
@@ -176,8 +179,10 @@
         }
 
         .content {
-            padding: 30px;
-            min-height: 500px;
+            flex: 1;
+            overflow: hidden;
+            display: flex;
+            flex-direction: column;
         }
 
         .tab-content {
@@ -204,52 +209,55 @@
             display: flex;
             justify-content: center;
             align-items: center;
-            gap: 15px;
-            margin-bottom: 20px;
-            padding: 15px;
+            gap: 12px;
+            padding: 10px;
             background: #f8f9fa;
-            border-radius: 10px;
+            border-bottom: 1px solid #dee2e6;
+            flex-shrink: 0;
         }
 
         .pdf-controls button {
-            padding: 10px 20px;
+            padding: 8px 16px;
             background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
             color: white;
             border: none;
-            border-radius: 8px;
+            border-radius: 6px;
             cursor: pointer;
-            font-weight: bold;
-            transition: all 0.3s ease;
+            font-weight: 600;
+            font-size: 0.85em;
+            transition: all 0.2s ease;
         }
 
         .pdf-controls button:hover:not(:disabled) {
-            transform: translateY(-2px);
-            box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
+            transform: translateY(-1px);
+            box-shadow: 0 3px 8px rgba(102, 126, 234, 0.3);
         }
 
         .pdf-controls button:disabled {
-            opacity: 0.5;
+            opacity: 0.4;
             cursor: not-allowed;
         }
 
         .pdf-controls span {
-            font-weight: bold;
+            font-weight: 600;
+            font-size: 0.9em;
             color: #495057;
         }
 
         .pdf-viewer-container {
-            border: 2px solid #e9ecef;
-            border-radius: 10px;
-            background: #f8f9fa;
-            padding: 20px;
+            flex: 1;
             overflow: auto;
-            max-height: 700px;
+            background: #525252;
+            display: flex;
+            align-items: center;
+            justify-content: center;
         }
 
         .pdf-canvas {
             display: block;
-            margin: 0 auto;
-            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
+            max-width: 100%;
+            height: auto;
+            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
         }
 
         .empty-state {
@@ -286,18 +294,19 @@
 <body>
     <div class="container">
         <div class="header">
-            <h1>📄 PDF Tab Viewer</h1>
-            <p>Chọn hoặc kéo thả nhiều file PDF để xem (hỗ trợ mọi trình duyệt)</p>
+            <h1>📄 PDF Viewer</h1>
+            <div class="file-count" id="fileCount" style="display: none;">0 file</div>
         </div>
 
         <div class="upload-section">
             <div class="upload-area" id="uploadArea">
                 <div class="upload-icon">📁</div>
-                <div class="upload-text">Nhấn để chọn file PDF</div>
-                <div class="upload-hint">hoặc kéo thả file vào đây (có thể chọn nhiều file)</div>
+                <div>
+                    <div class="upload-text">Chọn PDF</div>
+                    <div class="upload-hint">hoặc kéo thả (nhiều file)</div>
+                </div>
             </div>
             <input type="file" id="fileInput" accept=".pdf" multiple>
-            <div class="file-count" id="fileCount" style="display: none;">0 file đã chọn</div>
         </div>
 
         <div class="tabs" id="tabs"></div>
@@ -361,7 +370,7 @@
             pdfFiles = [...pdfFiles, ...newFiles];
 
             fileCountEl.style.display = 'inline-block';
-            fileCountEl.textContent = `${pdfFiles.length} file đã chọn`;
+            fileCountEl.textContent = `${pdfFiles.length} file`;
 
             newFiles.forEach((file, idx) => {
                 const fileIndex = startIndex + idx;
@@ -516,7 +525,7 @@
                     </div>
                 `;
             } else {
-                fileCountEl.textContent = `${pdfFiles.length} file đã chọn`;
+                fileCountEl.textContent = `${pdfFiles.length} file`;
                 if (activeIndex >= pdfFiles.length) {
                     switchTab(Math.max(0, pdfFiles.length - 1));
                 }