add document viewer

src/app/styles/watch-doc.scss

@@ -59,6 +59,7 @@
 			align-items: center;
 			justify-content: space-between;
 			margin-top: 8px;
+			gap: 10px;
 
 			&__nav {
 				display: flex;
@@ -106,6 +107,63 @@
 				}
 			}
 		}
+
+		.prev-wrap {
+			min-height: 400px;
+			min-width: 300px;
+			position: relative;
+			display: flex;
+			justify-content: center;
+		}
+
+		.pdf-canvas {
+			display: block;
+			max-width: 100%;
+			height: auto;
+		}
+
+		.pdf-container {
+			width: 100%;
+			overflow-x: auto;
+		}
+
+		.pdf-container:fullscreen {
+			background: #f5f5f5;
+			padding: 20px;
+			gap: 20px;
+
+			.prev-wrap {
+				flex: 1;
+				min-height: auto;
+				display: flex;
+				justify-content: center;
+				align-items: center;
+				background: #f5f5f5;
+			}
+
+			.pdf-canvas {
+				max-width: 100%;
+				max-height: calc(100vh - 120px);
+				width: auto;
+				height: auto;
+				object-fit: contain;
+			}
+
+			.document-controls {
+				position: fixed;
+				bottom: 20px;
+				left: 50%;
+				transform: translateX(-50%);
+				background: rgba(255, 255, 255, 0.95);
+				backdrop-filter: blur(10px);
+				box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
+				border-radius: 12px;
+				padding: 0.75rem 1.5rem;
+				z-index: 1000;
+				min-width: 300px;
+				justify-content: center;
+			}
+		}
 	}
 
 	&-page {