.library-tabs{display:flex;gap:8px;border-bottom:1px solid var(--line);margin-bottom:28px;padding-bottom:12px}.library-tabs a{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--muted);padding:10px 18px;border-radius:10px;font-weight:600}.library-tabs a.on{background:var(--accent-soft);color:var(--accent)}.material-intro{display:flex;align-items:center;gap:12px;background:var(--accent-soft);color:var(--accent);padding:16px 20px;border-radius:12px;margin:0 0 24px;font-size:14px}.material-filters{display:flex;gap:12px;margin-bottom:18px}.material-search{flex:1}.material-filters select{width:auto;max-width:230px}.material-types{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:24px}.material-types button{border:1px solid var(--line);border-radius:22px;background:var(--surface);padding:8px 16px;font-size:14px}.material-types button.on{background:var(--ink);color:var(--bg);border-color:var(--ink)}.material-types button span{margin-left:7px;opacity:.65}.material-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.material-card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px;display:flex;flex-direction:column;min-width:0;box-shadow:var(--shadow)}.material-card-top{display:flex;align-items:center;gap:9px;margin-bottom:24px;flex-wrap:wrap}.material-mark{display:inline-grid;place-items:center;width:42px;height:46px;background:var(--accent-soft);color:var(--accent);border-radius:11px}.material-mark.presentation{background:var(--warn-soft);color:var(--warn)}.material-mark.guide{background:var(--good-soft);color:var(--good)}.material-kind{font-size:12px;color:var(--muted)}.material-visibility{font-size:10px;color:var(--good);background:var(--good-soft);padding:4px 7px;border-radius:6px;margin-left:auto}.material-visibility.private{color:var(--muted);background:var(--surface-2)}.material-subject{font-size:12px;color:var(--muted);margin-bottom:9px;overflow-wrap:anywhere}.material-card h2{font-size:20px;line-height:1.35;margin-bottom:12px;overflow-wrap:anywhere}.material-card h2 a{color:var(--ink);text-decoration:none}.material-card h2 a:hover{color:var(--accent)}.material-description{color:var(--muted);font-size:14px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;line-height:1.6;min-height:66px}.material-meta{display:flex;gap:6px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin:14px 0 20px}.material-card-foot{display:flex;gap:12px;align-items:center;justify-content:space-between;margin-top:auto;border-top:1px solid var(--line);padding-top:18px}.material-card-foot .btn{font-size:13px;padding:8px 10px;gap:6px}.material-card-foot svg{width:15px}.material-empty{grid-column:1/-1;background:var(--surface);border:1px dashed var(--line-strong);padding:55px 24px;border-radius:16px;text-align:center}.material-empty>svg{width:40px;height:40px;color:var(--muted);margin-bottom:16px}.material-empty h2{margin-bottom:12px}.material-empty p{color:var(--muted);max-width:500px;margin:0 auto 20px}.material-editor{max-width:820px}.material-editor>.card{padding:26px;margin-bottom:20px}.material-editor h2{margin-bottom:20px;font-size:20px}.material-form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}.material-upload{display:block;padding:22px;border:1px dashed var(--line-strong);border-radius:12px;background:var(--surface-2)}.material-upload>span{display:flex;gap:10px;align-items:center;margin-bottom:12px;color:var(--accent);font-weight:600}.material-upload input{max-width:100%;font-size:13px}.material-audience{display:grid;gap:12px}.material-audience label{display:flex;align-items:flex-start;gap:12px;border:1px solid var(--line);padding:15px;border-radius:12px}.material-audience label:has(input:checked){border-color:var(--accent);background:var(--accent-soft)}.material-audience small{display:block;color:var(--muted);margin-top:4px;font-size:13px}.material-audience input{margin-top:5px;accent-color:var(--accent)}.material-student-tools{display:flex;gap:20px;align-items:center;margin:20px 0 12px}.material-student-tools select{max-width:280px}.material-student-list{display:grid;grid-template-columns:1fr 1fr;gap:12px;max-height:280px;overflow:auto;padding:4px}.material-student-list label{display:flex;gap:10px;align-items:center}.material-save{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:20px}.material-save .error{flex-basis:100%}.material-save .danger{margin-left:auto}.material-full-text{white-space:pre-wrap;overflow-wrap:anywhere;margin:20px 0 26px;line-height:1.8}.material-detail-head .material-mark{margin-bottom:20px}.material-detail-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:24px}.material-body,.material-side{padding:28px}.material-body h2{margin:10px 0 18px}.material-body>.btn{margin-bottom:24px}.material-side{height:fit-content}.material-side h2{font-size:18px;margin-bottom:16px}.material-side p{margin-bottom:16px}.material-grid .btn{white-space:normal}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
@media(max-width:1000px){.material-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.material-detail-layout{grid-template-columns:minmax(0,1fr) 230px}}
@media(max-width:640px){.material-grid{grid-template-columns:1fr;gap:14px}.material-filters{flex-wrap:wrap}.material-search{flex-basis:100%}.material-filters select{flex:1;min-width:0;max-width:100%;font-size:13px}.material-types{gap:7px}.material-types button{font-size:12px;padding:8px 12px}.material-card{padding:20px}.material-card-top{margin-bottom:18px}.material-form-row,.material-student-list,.material-detail-layout{grid-template-columns:1fr}.material-editor>.card,.material-body,.material-side{padding:20px}.material-intro{align-items:flex-start;font-size:13px;padding:15px}.material-student-tools{flex-wrap:wrap;gap:12px}.material-save .danger{margin-left:0;flex-basis:100%;text-align:left}.material-audience strong{font-size:14px}.material-save .btn{flex:1}.library-tabs{margin-bottom:22px}.library-tabs a{font-size:14px;padding:9px 15px}}

/* Обложки и акценты используют ту же палитру в обеих темах. */
.material-card{position:relative;overflow:hidden;animation:material-appear .3s ease both;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.material-card:nth-child(2){animation-delay:35ms}.material-card:nth-child(3){animation-delay:70ms}.material-card:nth-child(4){animation-delay:105ms}.material-card:nth-child(5){animation-delay:140ms}.material-card:nth-child(6){animation-delay:175ms}
@media(hover:hover){.material-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--line-strong)}}
@keyframes material-appear{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.material-cover{--cover-color:var(--accent);display:block;height:176px;position:relative;border:1px solid color-mix(in srgb,var(--cover-color) 15%,var(--line));border-radius:12px;background:color-mix(in srgb,var(--cover-color) 9%,var(--surface));overflow:hidden;margin-bottom:20px;text-decoration:none;color:var(--ink)}
.material-cover.presentation{--cover-color:var(--warn)}.material-cover.guide{--cover-color:var(--good)}.material-cover.notes{--cover-color:#8b6bd8}.material-cover.other{--cover-color:var(--muted)}
.material-cover-fallback{padding:20px;display:flex;flex-direction:column;gap:7px;position:relative;height:100%}.material-cover-fallback>svg{position:absolute;right:17px;top:17px;width:30px;height:30px;color:var(--cover-color);opacity:.65}.material-cover-fallback>span{color:var(--cover-color);font-size:10px;text-transform:uppercase;letter-spacing:.09em;max-width:80%;font-weight:700}.material-cover-fallback>strong{font-size:19px;line-height:1.3;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;max-width:90%;margin-top:5px}.material-cover-fallback>small{font-size:12px;color:var(--muted)}
.material-cover-fallback::after{content:"";width:70%;height:3px;border-radius:4px;background:var(--cover-color);opacity:.16;position:absolute;left:20px;bottom:43px;box-shadow:0 9px 0 color-mix(in srgb,var(--cover-color) 40%,transparent)}
.material-cover-caption{position:absolute;left:10px;bottom:9px;z-index:1;background:var(--surface);border:1px solid var(--line);color:var(--muted);border-radius:6px;padding:3px 7px;font-size:10px;max-width:calc(100% - 20px);white-space:nowrap;text-overflow:ellipsis;overflow:hidden;box-shadow:var(--shadow)}
.material-cover.has-preview>.material-cover-fallback{display:none}.material-cover>img,.material-cover>canvas{display:block;width:100%;height:100%;object-fit:contain;background:#fff;object-position:top center}.material-cover>img{object-fit:cover;object-position:center}.material-cover .material-slide-text{padding:20px 21px 35px;display:flex;flex-direction:column;gap:10px;height:100%}.material-slide-text small{font-size:9px;letter-spacing:.16em;color:var(--cover-color);font-weight:700}.material-slide-text strong{font-size:19px;line-height:1.2;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.material-slide-text p{font-size:11px;color:var(--muted);margin:0;overflow:hidden;max-height:30px}
.material-card-top{margin-bottom:18px}.material-mark.notes{background:color-mix(in srgb,#8b6bd8 12%,var(--surface));color:#8b6bd8}.material-mark.link{background:var(--accent-soft);color:var(--accent)}.material-mark.other{background:var(--surface-2);color:var(--muted)}
.material-dropzone{border:2px dashed var(--line-strong);border-radius:16px;padding:30px 20px;display:flex;flex-direction:column;align-items:center;gap:10px;background:var(--surface-2);text-align:center;transition:background .18s,border-color .18s,box-shadow .18s}
.material-dropzone.drag-over{border-color:var(--accent);background:var(--accent-soft);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 10%,transparent)}
.material-drop-icon{background:var(--surface);border:1px solid var(--line);width:50px;height:50px;border-radius:15px;display:grid;place-items:center;color:var(--accent);box-shadow:var(--shadow);margin-bottom:4px}.material-drop-icon svg{width:25px;height:25px}.material-dropzone>strong{font-size:17px}.material-dropzone p{font-size:14px;color:var(--muted);margin:0}.material-dropzone>small{font-size:12px;color:var(--muted);margin-top:6px}.material-dropzone .btn{margin:4px 0}
.material-upload-item{display:flex;align-items:center;gap:12px;padding:14px 0;border-bottom:1px solid var(--line);min-width:0}.material-file-icon{width:38px;height:44px;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent);border-radius:10px;flex-shrink:0}.material-upload-info{flex:1;min-width:0}.material-upload-info strong{display:block;overflow-wrap:anywhere;font-size:13px;font-weight:600}.material-upload-info small{font-size:11px;color:var(--muted)}.material-upload-item.error .material-upload-info small{color:var(--bad)}.material-upload-percent{font-size:12px;color:var(--accent);font-variant-numeric:tabular-nums}.material-upload-done{width:22px;height:22px;display:grid;place-items:center;border-radius:50%;background:var(--good-soft);color:var(--good);font-size:12px}.material-file-progress{height:4px;background:var(--line);border-radius:4px;overflow:hidden;margin-top:8px}.material-file-progress i{display:block;height:100%;background:var(--accent);border-radius:4px;transition:width .15s}
#material-upload-status{margin-top:12px}.material-card:focus-within{border-color:var(--accent)}
@media(max-width:640px){.material-cover{height:164px}.material-dropzone{padding:24px 16px}.material-upload-item{gap:8px;flex-wrap:wrap}.material-upload-item>.link{font-size:11px}.material-upload-info{min-width:130px}.material-card-top{gap:8px}}
@media(prefers-reduced-motion:reduce){.material-card{animation:none;transition:none}.material-card:hover{transform:none}.material-dropzone,.material-file-progress i{transition:none}}