/* Base Wrapper & Layout */
		 .wrapper {
		   max-width: 850px;
		   margin: auto;
		 }

		 /* Card Container */
		 .box {
		   background: #fff;
		   border-radius: 14px;
		   box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
		   margin-bottom: 25px;
		   overflow: hidden;
		   border: 1px solid #e5e7eb;
		 }

		 .box-title {
		   background: linear-gradient(135deg, #1e3a8a, #2563eb);
		   color: #fff;
		   padding: 16px 20px;
		   font-size: 15px;
		   font-weight: bold;
		 }

		 .box-content {
		   padding: 0;
		 }

		 /* --- RESPONSIVE PDF CONTAINER (A4 Aspect Ratio) --- */
		 .pdf-container {
		   position: relative;
		   width: 100%;
		   /* 1:1.414 ratio (height to width) matches standard A4 paper */
		   padding-top: 141.4%;
		   overflow: hidden;
		   background: #f3f4f6;
		   border-bottom: 1px solid #e5e7eb;
		 }

		 .pdf-frame {
		   position: absolute;
		   top: 0;
		   left: 0;
		   width: 100%;
		   height: 100%;
		   border: none;
		 }

		 /* Info Table */
		 .info-table {
		   width: 100%;
		   border-collapse: collapse;
		 }

		 .info-table tr {
		   border-bottom: 1px solid #e5e7eb;
		 }

		 .info-table td {
		   padding: 14px 16px;
		   font-size: 14px;
		   vertical-align: top;
		 }

		 .info-label {
		   background: #f3f4f6;
		   font-weight: bold;
		   color: #1e3a8a;
		   width: 30%;
		   border-right: 2px solid #e5e7eb;
		   white-space: nowrap;
		 }

		 .info-label span {
		   margin-right: 6px;
		   font-size: 14px;
		 }

		 .info-value {
		   color: #111827;
		   width: 70%;
		 }

		 /* Abstract Text */
		 .abs-text {
		   padding: 18px;
		   text-align: justify;
		   color: #374151;
		   font-size: 14px;
		   line-height: 1.7;
		 }

		 /* Download Section */
		 .download-sec {
		   padding: 18px;
		   border-top: 1px solid #eee;
		   background: #f9fafb;
		 }

		 .download-sec h4 {
		   margin: 0 0 12px;
		   font-size: 16px;
		   color: #1f2937;
		 }

		 .download-btn {
		   display: inline-block;
		   margin: 6px 10px 6px 0;
		   padding: 10px 18px;
		   background: linear-gradient(135deg, #2563eb, #1e3a8a);
		   color: #fff;
		   text-decoration: none;
		   font-weight: 600;
		   border-radius: 8px;
		   transition: all 0.3s ease;
		   box-shadow: 0 4px 10px rgba(37, 99, 235, 0.3);
		 }

		 .download-btn:hover {
		   background: linear-gradient(135deg, #1e3a8a, #1e40af);
		   transform: translateY(-2px);
		 }

		 /* Responsive Styles */
		 @media (max-width: 768px) {
		   .info-table,
		   .info-table tr,
		   .info-table td {
		     display: block;
		     width: 100%;
		   }

		   .info-label {
		     background: #eef2ff;
		     border-right: none;
		     border-bottom: 1px solid #ddd;
		     width: 100%;
		     padding: 10px;
		     font-size: 14px;
		   }

		   .info-value {
		     padding: 10px;
		     font-size: 14px;
		     width: 100%;
		   }

		   .info-table tr {
		     margin-bottom: 12px;
		     border-bottom: 2px solid #e5e7eb;
		   }
		  }