:root{--preview-primary:#193c76;--preview-secondary:#0077b6;--preview-success:#28a745;--preview-danger:#dc3545;--preview-warning:#ffc107;--preview-dark:#212529;--preview-light:#f8f9fa;--preview-border:#dee2e6}#materialPreviewModal .modal-dialog{max-width:90%;margin:1.75rem auto}#materialPreviewModal .modal-content{border-radius:16px;border:none;box-shadow:0 10px 40px rgba(0,0,0,0.2)}#materialPreviewModal .modal-header{background:linear-gradient(135deg,var(--preview-primary),var(--preview-secondary));color:white;border-radius:16px 16px 0 0;padding:20px 30px;border:none}#materialPreviewModal .modal-header .btn-close{filter:brightness(0) invert(1);opacity:0.8}#materialPreviewModal .modal-header .btn-close:hover{opacity:1}.preview-header-info{display:flex;flex-direction:column;gap:8px;flex:1}.preview-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,0.2);padding:4px 12px;border-radius:20px;font-size:12px;font-weight:600;width:fit-content}.preview-badge i{font-size:14px}#materialPreviewModal .modal-title{margin:0;font-size:20px;font-weight:700}#materialPreviewModal .modal-body{padding:30px;min-height:400px;max-height:calc(100vh - 300px);overflow-y:auto}#materialPreviewModal .modal-footer{padding:20px 30px;border-top:2px solid var(--preview-border);background:var(--preview-light);border-radius:0 0 16px 16px}.preview-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:400px;gap:20px}.preview-loading .spinner-border{width:3rem;height:3rem}.preview-loading p{font-size:16px;color:#666;margin:0}.preview-error{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:400px;gap:20px;text-align:center}.preview-error i{font-size:64px;color:var(--preview-danger)}.preview-error h4{color:var(--preview-dark);font-weight:700;margin:0}.preview-error p{color:#666;max-width:500px;margin:0}.preview-container{animation:fadeIn 0.3s ease-in}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.video-wrapper{position:relative;width:100%;border-radius:12px;overflow:hidden;box-shadow:0 4px 16px rgba(0,0,0,0.1);background:#000}.video-wrapper #videoPlayer{width:100%;height:auto;min-height:400px}.plyr{border-radius:12px}.plyr--video{background:#000}.plyr__control--overlaid{background:rgba(25,60,118,0.9)}.plyr__control--overlaid:hover{background:var(--preview-primary)}.plyr--full-ui input[type=range]{color:var(--preview-primary)}.plyr__control.plyr__tab-focus,.plyr__control:hover,.plyr__control[aria-expanded=true]{background:var(--preview-primary)}.text-content-wrapper{background:white;border-radius:12px;padding:30px;box-shadow:0 2px 8px rgba(0,0,0,0.05);border:1px solid var(--preview-border)}.text-preview-content{font-size:16px;line-height:1.8;color:#333;max-height:500px;overflow-y:auto}.text-preview-content h1,.text-preview-content h2,.text-preview-content h3,.text-preview-content h4,.text-preview-content h5,.text-preview-content h6{color:var(--preview-primary);font-weight:700;margin-top:24px;margin-bottom:12px}.text-preview-content h1{font-size:28px}.text-preview-content h2{font-size:24px}.text-preview-content h3{font-size:20px}.text-preview-content p{margin-bottom:16px}.text-preview-content ul,.text-preview-content ol{margin-bottom:16px;padding-left:24px}.text-preview-content li{margin-bottom:8px}.text-preview-content strong{font-weight:600;color:var(--preview-dark)}.text-preview-content em{font-style:italic}.text-preview-content code{background:var(--preview-light);padding:2px 6px;border-radius:4px;font-family:'Courier New',monospace;font-size:14px;color:var(--preview-danger)}.text-preview-content pre{background:var(--preview-dark);color:#fff;padding:16px;border-radius:8px;overflow-x:auto;margin-bottom:16px}.text-preview-content blockquote{border-left:4px solid var(--preview-primary);padding-left:16px;margin:16px 0;font-style:italic;color:#666}.pdf-controls{display:flex;justify-content:space-between;align-items:center;padding:16px;background:var(--preview-light);border-radius:12px 12px 0 0;border:1px solid var(--preview-border);border-bottom:none;gap:16px;flex-wrap:wrap}.pdf-nav-controls{display:flex;align-items:center;gap:12px}.pdf-page-info{font-size:14px;font-weight:600;color:var(--preview-dark);padding:0 8px}.pdf-zoom-controls{display:flex;align-items:center;gap:12px}#pdfZoomLevel{font-size:14px;font-weight:600;color:var(--preview-dark);min-width:50px;text-align:center}.pdf-viewer-wrapper{background:#525659;border:1px solid var(--preview-border);border-radius:0 0 12px 12px;padding:20px;display:flex;justify-content:center;align-items:flex-start;min-height:500px;max-height:600px;overflow:auto}#pdfCanvas{max-width:100%;height:auto;box-shadow:0 4px 16px rgba(0,0,0,0.3);background:white}.preview-note{display:flex;align-items:center;gap:12px;margin-top:20px;padding:16px 20px;background:linear-gradient(135deg,rgba(40,167,69,0.1),rgba(32,201,151,0.1));border:1px solid rgba(40,167,69,0.3);border-radius:12px}.preview-note i{font-size:20px;color:var(--preview-success);flex-shrink:0}.preview-note span{font-size:14px;color:#333;font-weight:500}@media (max-width:991px){#materialPreviewModal .modal-dialog{max-width:95%}#materialPreviewModal .modal-body{padding:20px;max-height:calc(100vh - 250px)}.text-content-wrapper{padding:20px}.text-preview-content{font-size:15px}.video-wrapper #videoPlayer{min-height:300px}}@media (max-width:768px){#materialPreviewModal .modal-header{padding:16px 20px}#materialPreviewModal .modal-title{font-size:18px}#materialPreviewModal .modal-body{padding:16px}#materialPreviewModal .modal-footer{padding:16px 20px;flex-direction:column;gap:10px}#materialPreviewModal .modal-footer .btn{width:100%}.pdf-controls{flex-direction:column;align-items:stretch;gap:12px}.pdf-nav-controls{justify-content:space-between}.pdf-zoom-controls{justify-content:center}.preview-note{padding:12px 16px}.preview-note span{font-size:13px}.video-wrapper #videoPlayer{min-height:250px}}@media (max-width:576px){#materialPreviewModal .modal-dialog{margin:0.5rem;max-width:calc(100% - 1rem)}.text-content-wrapper{padding:16px}.text-preview-content{font-size:14px}.pdf-page-info{font-size:13px}.pdf-controls .btn{padding:6px 10px;font-size:13px}.video-wrapper #videoPlayer{min-height:200px}}.text-preview-content::-webkit-scrollbar,.pdf-viewer-wrapper::-webkit-scrollbar,#materialPreviewModal .modal-body::-webkit-scrollbar{width:8px}.text-preview-content::-webkit-scrollbar-track,.pdf-viewer-wrapper::-webkit-scrollbar-track,#materialPreviewModal .modal-body::-webkit-scrollbar-track{background:var(--preview-light);border-radius:4px}.text-preview-content::-webkit-scrollbar-thumb,.pdf-viewer-wrapper::-webkit-scrollbar-thumb,#materialPreviewModal .modal-body::-webkit-scrollbar-thumb{background:#ccc;border-radius:4px}.text-preview-content::-webkit-scrollbar-thumb:hover,.pdf-viewer-wrapper::-webkit-scrollbar-thumb:hover,#materialPreviewModal .modal-body::-webkit-scrollbar-thumb:hover{background:#999}