.material-categories{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin:26px 0 22px}
.material-categories[hidden],.material-collection-panel[hidden],.material-collections[hidden],.material-controls[hidden],.material-list[hidden]{display:none!important}
.material-category{appearance:none;text-align:left;border:1px solid var(--line);background:var(--card);padding:22px;cursor:pointer;transition:.2s ease;color:var(--ink)}
.material-category:hover,.material-category.active{transform:translateY(-2px);border-color:var(--accent);box-shadow:0 12px 34px rgba(65,45,25,.08)}
.material-category .material-icon{font-size:25px;display:block;margin-bottom:20px}
.material-category strong{font-family:var(--serif);font-size:21px;display:block}
.material-category small{color:var(--muted);display:block;margin-top:7px;line-height:1.55}
.material-category b{color:var(--accent);font-size:12px;font-weight:600;display:inline-block;margin-top:16px}
.material-collection-panel{margin:26px 0 22px}
.material-collection-heading{display:flex;justify-content:space-between;gap:22px;align-items:flex-start;margin-bottom:16px;padding:20px 22px;border:1px solid var(--line);background:var(--paper)}
.material-collection-heading h3{font-family:var(--serif);font-size:27px;margin:2px 0 5px}.material-collection-heading p{color:var(--muted);margin:0}
.material-collection-heading button{appearance:none;border:1px solid var(--line);background:var(--card);color:var(--ink);padding:10px 14px;cursor:pointer;white-space:nowrap}
.material-collection-heading button:hover{border-color:var(--accent);color:var(--accent)}
.material-collections{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.material-collection{appearance:none;text-align:left;border:1px solid var(--line);background:var(--card);padding:26px;cursor:pointer;color:var(--ink);transition:.2s ease}
.material-collection:hover,.material-collection.active{transform:translateY(-2px);border-color:var(--accent);box-shadow:0 12px 34px rgba(65,45,25,.08)}
.material-collection span{display:block;color:var(--accent);font-size:12px;letter-spacing:.12em;margin-bottom:15px}.material-collection strong{font-family:var(--serif);font-size:24px;display:block}.material-collection small{display:block;color:var(--muted);line-height:1.6;margin-top:8px}.material-collection b{display:inline-block;color:var(--accent);font-size:12px;margin-top:18px}
.material-controls{grid-template-columns:1fr 190px 180px;margin-bottom:14px}
.material-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.material-item{display:grid;grid-template-columns:48px minmax(0,1fr) auto;gap:14px;align-items:center;padding:18px;border:1px solid var(--line);background:var(--card);cursor:pointer;transition:.18s ease}
.material-item:hover,.material-item:focus{border-color:var(--accent);transform:translateY(-1px);outline:none}
.material-file-icon{width:46px;height:52px;display:grid;place-items:center;background:var(--paper);border:1px solid var(--line);font-size:21px}
.material-item h3{font-size:16px;margin:0 0 6px;line-height:1.35}
.material-meta{font-size:12px;color:var(--muted);line-height:1.5}
.material-tags{display:flex;flex-wrap:wrap;gap:5px;margin-top:8px}.material-tags span{font-size:10px;color:var(--muted);border:1px solid var(--line);border-radius:20px;padding:1px 7px}
.material-kind{font-size:11px;color:var(--accent);letter-spacing:.08em;border:1px solid var(--line);padding:4px 7px}
.material-loading{padding:60px 20px;text-align:center;color:var(--muted)}
.material-dialog{width:min(1000px,92vw);max-height:90vh;padding:28px}
.material-preview{margin:22px 0;background:#161616;min-height:260px;display:grid;place-items:center;overflow:auto}
.material-preview img{display:block;max-width:100%;max-height:68vh;object-fit:contain}
.material-preview audio{width:min(720px,90%);margin:70px 20px}
.material-preview video{display:block;max-width:100%;max-height:68vh}
.material-preview iframe{width:100%;height:68vh;border:0;background:white}
.material-preview pre{width:100%;max-height:62vh;overflow:auto;background:#fff;color:#242424;text-align:left;padding:24px;white-space:pre-wrap;margin:0;font-family:ui-monospace,Consolas,monospace;font-size:13px}
.material-actions{display:flex;gap:10px;flex-wrap:wrap}.material-actions .button{border:0;cursor:pointer}
.reading-cover{min-height:180px}.reading-cover img{max-height:340px}
.reading-parts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px;margin:12px 0 18px}
.reading-parts button{appearance:none;border:1px solid var(--line);background:var(--card);color:var(--ink);padding:13px 14px;text-align:left;cursor:pointer;display:flex;justify-content:space-between;gap:10px;align-items:center}
.reading-parts button:hover,.reading-parts button.active{border-color:var(--accent);background:var(--paper)}
.reading-parts button:disabled{opacity:.65;cursor:wait}.reading-parts small{color:var(--muted)}
.reading-pane{margin-top:16px}.reading-pane .material-actions{margin-bottom:12px}
@media(max-width:850px){.material-categories{grid-template-columns:repeat(2,minmax(0,1fr))}.material-list{grid-template-columns:1fr}.material-controls{grid-template-columns:1fr}}
@media(max-width:520px){.material-categories,.material-collections{grid-template-columns:1fr}.material-collection-heading{display:block}.material-collection-heading button{margin-top:16px;width:100%}.material-dialog{padding:20px 14px}.material-item{grid-template-columns:42px minmax(0,1fr)}.material-kind{display:none}.reading-parts{grid-template-columns:1fr}.reading-cover img{max-height:56vh}.reading-pane .material-preview iframe{height:62vh}}