*,:after,:before{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;background:#f0f4f8;color:#1a202c;min-height:100vh}.container{max-width:900px;margin:0 auto;padding:2rem 1rem}.header{text-align:center;margin-bottom:2.5rem}.header h1{font-size:2.5rem;font-weight:800;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:.5rem}.header p{color:#718096;font-size:1.1rem}.dropzone{border:2.5px dashed #a0aec0;border-radius:16px;padding:3rem 2rem;text-align:center;cursor:pointer;transition:all .3s ease;background:#fff;margin-bottom:2rem;position:relative}.dropzone.dragging,.dropzone:hover{border-color:#667eea;background:#f7f8ff;box-shadow:0 0 0 4px rgba(102,126,234,.15)}.dropzone input[type=file]{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%;height:100%}.dropzone-icon{font-size:3.5rem;margin-bottom:1rem;display:block}.dropzone h2{font-size:1.3rem;font-weight:600;color:#2d3748;margin-bottom:.5rem}.dropzone p{color:#a0aec0;font-size:.95rem}.dropzone .browse-link{color:#667eea;font-weight:600;text-decoration:underline}.files-section h2{font-size:1.4rem;font-weight:700;color:#2d3748;margin-bottom:1.25rem;display:flex;align-items:center;gap:.5rem}.files-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));grid-gap:1.25rem;gap:1.25rem}.file-card{background:#fff;border-radius:14px;box-shadow:0 2px 12px rgba(0,0,0,.08);overflow:hidden;transition:transform .2s,box-shadow .2s;display:flex;flex-direction:column}.file-card:hover{transform:translateY(-3px);box-shadow:0 6px 24px 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.2s;display:flex;align-items:center;justify-content:center;gap:.3rem;text-decoration:none}.btn-download{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.btn-download:hover{opacity:.9;transform:scale(1.03)}.btn-delete{background:#fff5f5;color:#e53e3e;border:1px solid #fed7d7}.btn-delete:hover{background:#fed7d7}.btn-preview{background:#ebf8ff;color:#3182ce;border:1px solid #bee3f8}.btn-preview:hover{background:#bee3f8}.empty-state{text-align:center;padding:3rem 1rem;color:#a0aec0}.empty-state span{font-size:3rem;display:block;margin-bottom:1rem}.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.7);display:flex;align-items:center;justify-content:center;z-index:1000;padding:1rem;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.modal-content{background:#fff;border-radius:16px;max-width:800px;width:100%;max-height:90vh;overflow:auto;position:relative;box-shadow:0 20px 60px rgba(0,0,0,.3)}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:1.25rem 1.5rem;border-bottom:1px solid #edf2f7}.modal-header h3{font-size:1.1rem;font-weight:700;color:#2d3748;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:80%}.modal-close{background:#edf2f7;border:none;border-radius:50%;width:36px;height:36px;font-size:1.2rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s;flex-shrink:0}.modal-close:hover{background:#e2e8f0}.modal-body{padding:1.5rem;display:flex;align-items:center;justify-content:center;min-height:200px}.modal-body img{object-fit:contain}.modal-body img,.modal-body video{max-width:100%;max-height:60vh;border-radius:8px}.modal-body audio{width:100%}.modal-body .text-preview{width:100%;background:#f7fafc;border-radius:8px;padding:1rem;font-family:monospace;font-size:.85rem;white-space:pre-wrap;word-break:break-all;max-height:50vh;overflow:auto;color:#2d3748;border:1px solid #e2e8f0}.modal-footer{padding:1rem 1.5rem;border-top:1px solid #edf2f7;display:flex;justify-content:flex-end;gap:.75rem}.toast{position:fixed;bottom:2rem;right:2rem;background:#2d3748;color:#fff;padding:.85rem 1.5rem;border-radius:12px;font-size:.95rem;font-weight:500;box-shadow:0 4px 20px rgba(0,0,0,.2);z-index:2000;animation:slideIn .3s ease}@keyframes slideIn{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.stats-bar{display:flex;gap:1.5rem;margin-bottom:2rem;flex-wrap:wrap}.stat-card{background:#fff;border-radius:12px;padding:1rem 1.5rem;box-shadow:0 2px 8px rgba(0,0,0,.06);flex:1 1;min-width:140px;text-align:center}.stat-card .stat-value{font-size:1.6rem;font-weight:800;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.stat-card .stat-label{font-size:.8rem;color:#a0aec0;margin-top:.2rem}@media (max-width:600px){.header h1{font-size:1.8rem}.files-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr))}}