:root{font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;color:#15353e;background:#f1f5f6;font-size:16px;line-height:1.55;--ink:#082e38;--muted:#60777e;--line:#d7e3e6;--teal:#087f87;--lime:#d4f27a;--white:#fff}*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button,a,input,textarea,select{outline-offset:4px}button{cursor:pointer;border:0;border-radius:12px;padding:11px 17px;background:var(--ink);color:white;font-weight:650;min-height:44px;transition:background .15s}button:hover{background:#165564}button:disabled{opacity:.5;cursor:not-allowed}button.secondary{color:var(--ink);background:#eaf0f2}button.secondary:hover{background:#d5e5e8}button.accent{background:var(--lime);color:var(--ink)}button.danger{background:#fff0ef;color:#ae3026}button.small{padding:7px 12px;font-size:.875rem}button.icon{padding:7px 12px;min-width:42px}a{color:#086d7b;overflow-wrap:anywhere}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(1.8rem,3.5vw,2.65rem);line-height:1.15;letter-spacing:-.04em}h2{font-size:1.5rem;line-height:1.25;letter-spacing:-.02em}h3{font-size:1.08rem;line-height:1.4}p:last-child{margin-bottom:0}.muted{color:var(--muted)}.eyebrow{font-size:.8rem;font-weight:750;text-transform:uppercase;letter-spacing:.12em}.badge{display:inline-flex;background:#e5f3f2;color:#096269;border-radius:7px;padding:4px 9px;font-size:.8rem;font-weight:650}.badge.warn{background:#fff0cc;color:#805413}.topbar{height:76px;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 30px;gap:20px}.brand{display:flex;align-items:center;gap:12px;font-weight:700;line-height:1.2}.mark{width:42px;height:42px;background:var(--lime);border-radius:12px;color:var(--ink);display:grid;place-items:center;font-size:24px}.brand small{display:block;font-size:.75rem;letter-spacing:.08em;font-weight:450;opacity:.7;margin-top:5px}.topbar button.secondary{background:#224752;color:#fff}.top-actions,.row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.between{justify-content:space-between}.shell{max-width:1450px;margin:auto;display:grid;grid-template-columns:260px minmax(0,1fr);min-height:calc(100vh - 76px)}.sidebar{padding:30px 22px;border-right:1px solid var(--line);background:#f7fafb}.sidebar .nav{display:block;width:100%;text-align:left;background:transparent;color:#506c74;margin:5px 0;padding:13px 15px}.sidebar .nav.active{background:var(--ink);color:#fff}.sidebar .caption{margin:28px 15px 9px}.main{padding:36px 42px;min-width:0}.welcome{display:grid;grid-template-columns:minmax(0,1fr) 220px;gap:25px;margin-bottom:32px;background:var(--ink);color:white;padding:32px;border-radius:24px}.welcome p{color:#c6dbdf;max-width:560px}.progress-card{border-left:1px solid #50717a;padding-left:26px;display:flex;flex-direction:column;justify-content:center}.big-number{font-size:3rem;font-weight:750;letter-spacing:-.06em;line-height:1.2}.progress{height:7px;background:#355760;border-radius:10px;overflow:hidden;margin:12px 0}.progress span{height:100%;background:var(--lime);display:block}.search{position:relative;margin:20px 0 28px}input,textarea,select{width:100%;border:1px solid #bdcfd4;background:white;color:var(--ink);border-radius:10px;padding:11px 13px;min-height:44px}textarea{resize:vertical;min-height:95px}input[type=checkbox],input[type=radio]{width:20px;min-height:20px;height:20px;accent-color:var(--teal);flex:0 0 auto}label.field{display:block;font-size:.875rem;font-weight:650;margin:15px 0}label.field input,label.field textarea,label.field select{margin-top:6px;font-weight:400}.search input{padding:15px 18px;background:white}.section-head{display:flex;align-items:center;gap:14px;margin:30px 0 17px}.section-head .number{font-size:.85rem;color:#698087;border:1px solid var(--line);border-radius:9px;padding:8px}.section-head h2{margin:0}.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.lesson-card{display:flex;flex-direction:column;background:white;border:1px solid var(--line);border-radius:18px;padding:22px;min-height:180px}.lesson-card h3{font-size:1.2rem;margin:13px 0 7px}.lesson-card p{color:var(--muted);margin-bottom:20px}.lesson-card .row{margin-top:auto}.lesson-card button{margin-left:auto}.empty{padding:45px 20px;text-align:center;border:1px dashed #b8cdd3;border-radius:18px;color:var(--muted);background:white}.notice{border-radius:14px;background:#eaf4f7;padding:18px 20px;border-left:4px solid #2287a0;margin:18px 0}.notice.warning{background:#fff6df;border-color:#d49a2b}.notice.success{background:#ebf6dd;border-color:#82af42}.notice h3{margin-bottom:5px}.reader{max-width:800px;margin:0 auto}.reader-head{margin:28px 0}.reader-head h1{margin:14px 0}.reader-body{background:white;border:1px solid var(--line);border-radius:20px;padding:30px}.content-block{margin:0 0 26px;overflow-wrap:anywhere}.content-block:last-child{margin-bottom:0}.content-block img{max-width:100%;max-height:620px;object-fit:contain;border-radius:14px;background:#f1f5f6;width:100%}.content-block figure{margin:0}.content-block figcaption{font-size:.875rem;color:var(--muted);margin-top:8px}.content-block video,.content-block audio{width:100%;border-radius:12px;background:#f0f4f5}.content-block video{max-height:500px}.prose{white-space:pre-wrap}.steps{list-style:none;padding:0;counter-reset:steps}.steps li{counter-increment:steps;display:flex;gap:15px;margin:15px 0;align-items:flex-start}.steps li:before{content:counter(steps);display:grid;place-items:center;flex:0 0 33px;height:33px;background:#e0f0ef;color:var(--teal);border-radius:50%;font-weight:700}.check{display:flex;gap:12px;align-items:flex-start;padding:13px 0;cursor:pointer}.quiz{border:1px solid var(--line);background:#f7fafb;border-radius:16px;padding:21px}.answer{display:block;width:100%;text-align:left;margin:8px 0;background:white;color:var(--ink);border:1px solid var(--line);font-weight:450}.answer.selected{border-color:var(--teal);background:#e1f4f2}.feedback{margin:14px 0 0;padding:12px;border-radius:10px;background:#fff0df}.feedback.correct{background:#e8f6da}.reader-footer{margin:20px 0;padding:20px;border-radius:16px;background:#e0eeee;display:flex;align-items:center;justify-content:space-between;gap:14px}.gallery{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.contact{border:1px solid var(--line);border-radius:14px;padding:20px}.login-wrap{min-height:100vh;display:grid;grid-template-columns:1fr 1fr}.login-art{padding:8vw 6vw;background:var(--ink);color:white;display:flex;flex-direction:column;justify-content:space-between;gap:50px}.login-art h1{font-size:clamp(2.5rem,5vw,5rem);max-width:650px}.login-art .lime{color:var(--lime)}.login-art p{color:#c0d5da;max-width:460px}.route-line{border-top:1px solid #4c6a73;display:flex;justify-content:space-between;padding-top:20px;font-size:.85rem;color:#bad1d7}.login-panel{display:flex;align-items:center;justify-content:center;padding:35px}.login-box{width:100%;max-width:410px}.login-box h2{font-size:2rem}.tabs{display:flex;padding:5px;background:#e4ecef;border-radius:13px;gap:5px;margin:25px 0}.tabs button{background:transparent;color:#456069;flex:1}.tabs button.active{background:white;color:var(--ink);box-shadow:0 2px 5px #1233}.full{width:100%}.error{color:#a83025;margin:12px 0}.adminbar{display:flex;justify-content:space-between;gap:14px;align-items:center;margin-bottom:22px;flex-wrap:wrap}.adminbar h1{font-size:1.8rem;margin:0}.editor-layout{display:grid;grid-template-columns:255px minmax(0,1fr);gap:20px}.tree{background:white;border:1px solid var(--line);border-radius:16px;padding:14px;align-self:start}.tree-section{margin-bottom:18px}.tree-section button{width:100%;text-align:left;background:#edf3f5;color:var(--ink);font-size:.875rem}.tree-lesson{display:flex;gap:4px;margin:5px 0 5px 10px}.tree-lesson button{background:white;font-weight:450}.tree-lesson button.active{background:#dff2ef;color:#00676a}.editor-panel{background:white;border:1px solid var(--line);border-radius:16px;padding:24px;min-width:0}.editor-panel h2{margin-bottom:6px}.block-edit{border:1px solid #cbdcdf;border-radius:14px;margin:15px 0;overflow:hidden}.block-edit>summary{padding:14px;background:#f4f8f9;cursor:pointer;font-weight:650;overflow-wrap:anywhere}.block-fields{padding:4px 18px 18px}.block-toolbar{padding:10px 15px;display:flex;gap:6px;justify-content:flex-end;border-top:1px solid var(--line)}.block-toolbar button{font-size:.85rem}.block-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:20px 0}.block-grid button{text-align:left;padding:18px 14px;background:#edf5f6;color:var(--ink)}.block-grid button span{display:block;font-size:.8rem;font-weight:450;color:var(--muted);margin-top:6px}.two{display:grid;grid-template-columns:1fr 1fr;gap:15px}.media-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.media-item{padding:14px;border:1px solid var(--line);border-radius:14px;background:white;overflow-wrap:anywhere}.media-item img{width:100%;height:130px;object-fit:cover;border-radius:9px}.media-item p{margin:10px 0;font-size:.875rem}.media-placeholder{height:100px;display:grid;place-items:center;background:#eaf1f3;border-radius:9px;font-size:1.5rem;font-weight:700}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;font-size:.875rem}td,th{text-align:left;border-bottom:1px solid var(--line);padding:14px 10px}th{background:#eaf2f4}dialog{border:0;border-radius:22px;padding:28px;max-width:800px;width:calc(100% - 30px);max-height:90vh;box-shadow:0 20px 100px #0019;color:var(--ink)}dialog::backdrop{background:#001c2c99}dialog #modal-close{margin-top:20px}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:#082e38;color:#fff;padding:13px 22px;border-radius:14px;z-index:100;max-width:calc(100vw - 30px);box-shadow:0 5px 25px #0003;display:none}#toast.show{display:block}.loading{padding:40px}.offline{background:#ffedbf;padding:10px 20px;text-align:center;font-size:.875rem}.save-state{font-size:.8rem;color:var(--muted)}.mobile-nav{display:none}.file-select{padding:18px;background:#f0f6f7;border:1px dashed #99b5bc;border-radius:12px}.file-select input{background:transparent;border:0;padding:8px 0}.footnote{margin-top:30px;font-size:.8rem;color:var(--muted)}hr{border:0;border-top:1px solid var(--line);margin:25px 0}progress{accent-color:var(--teal);width:100%}.upload-status{font-size:.875rem}button:focus-visible,a:focus-visible{outline:3px solid #25aab9}.unpublished{font-size:.8rem;color:#8c5b10}
@media(max-width:1100px){.main{padding:28px 24px}.shell{grid-template-columns:220px minmax(0,1fr)}.sidebar{padding:25px 12px}.editor-layout{grid-template-columns:1fr}.tree{max-height:280px;overflow:auto}.media-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:720px){.topbar{height:auto;min-height:72px;padding:14px 18px;gap:10px}.brand{font-size:.9rem}.brand small{font-size:.65rem}.top-actions button{font-size:.8rem;padding:8px 12px}.shell{display:block}.sidebar{padding:10px 14px;border-right:0;border-bottom:1px solid var(--line);display:flex;overflow:auto;gap:6px}.sidebar .nav{width:auto;white-space:nowrap;margin:0;padding:10px 14px;font-size:.875rem}.sidebar .caption,.sidebar .footnote{display:none}.main{padding:22px 16px}.welcome{padding:24px;grid-template-columns:1fr;gap:15px;border-radius:18px}.welcome h1{font-size:2rem}.progress-card{border-left:0;border-top:1px solid #50717a;padding:14px 0 0;display:block}.big-number{font-size:2rem}.cards{grid-template-columns:1fr}.lesson-card{min-height:160px}.reader-body{padding:21px 18px}.reader-footer{align-items:stretch;flex-direction:column}.login-wrap{display:block}.login-art{padding:30px 25px;gap:25px}.login-art h1{font-size:2.5rem;margin-bottom:15px}.login-art .route-line{display:none}.login-panel{padding:30px 24px}.login-art .brand{margin-bottom:15px}.editor-panel{padding:18px 14px}.block-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.two{grid-template-columns:1fr;gap:0}.adminbar .row{width:100%}.adminbar .row button{flex:1;font-size:.8rem}.media-grid{grid-template-columns:1fr 1fr}.gallery{grid-template-columns:1fr}.block-toolbar{flex-wrap:wrap}.topbar .brand small{max-width:140px}.section-head h2{font-size:1.25rem}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
/* v2: richer materials and editor */
.hint{font-size:.875rem;color:var(--muted);font-weight:400;line-height:1.5;margin:10px 0}.adminbar{position:sticky;top:0;z-index:5;background:#f1f5f6ed;backdrop-filter:blur(10px);padding:12px 0}.rule-box{margin:14px;padding:18px;background:#edf6f6;border:1px solid #c8e1e2;border-radius:14px}.rule-box h3{margin:0}.rule-box .two{align-items:center}.option-check{font-weight:650}.lesson-settings{display:grid;grid-template-columns:1fr 170px;gap:20px;padding:20px;background:#f0f6ec;border-radius:14px;margin:20px 0}.lesson-settings h3{margin:0}.lesson-settings label{margin:0}.template-row{margin:16px 0}.part-editor{background:#f6f9fa;border:1px solid #d5e4e7;border-radius:14px;margin:14px 0;padding:16px}.part-head{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:.875rem}.part-head .row{flex-wrap:nowrap;gap:4px}.part-editor textarea{min-height:110px}.insert-bar{display:flex;flex-wrap:wrap;gap:8px;padding:14px;background:#e5f1f2;border-radius:10px;margin:12px}.story-builder .insert-bar{margin:12px 0;position:sticky;bottom:10px;z-index:2;box-shadow:0 3px 15px #0024}.editor-thumb{max-width:100%;max-height:150px;object-fit:contain;border-radius:8px;margin:10px 0}.story:after{content:'';display:block;clear:both}.story-media{margin:18px 0}.story-left{float:left;width:43%;margin:5px 22px 16px 0}.story-right{float:right;width:43%;margin:5px 0 16px 22px}.story-wide{clear:both;width:100%}.story h3{margin-top:20px}.story figure{margin:0}.story .prose{min-height:8px}.video-unit{border:1px solid #cfe0e4;border-radius:16px;padding:16px;background:#f8fbfc}.video-unit h3{margin-bottom:14px}.video-unit video{width:100%;max-height:500px;background:#092e38;border-radius:10px}.video-meta{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center;margin-top:12px;font-size:.875rem}.video-unit progress{height:7px;border:0;border-radius:6px;display:block;margin-top:12px}.requirements{background:#e5eeee;border:1px solid #d0e2e4;padding:18px;border-radius:14px;margin-bottom:18px;font-size:.9rem}.requirement-list{display:flex;flex-wrap:wrap;gap:7px;margin-top:12px}.sort-task{padding:0;list-style:none}.sort-task li{display:grid;grid-template-columns:28px 1fr auto;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px;margin:8px 0}.sort-task li>div{display:flex;gap:5px}.sort-number{font-size:.875rem;color:var(--teal);font-weight:700}.motivation{display:flex;align-items:center;flex-wrap:wrap;gap:25px;background:white;border:1px solid #d6e4e6;border-radius:18px;padding:22px;margin:0 0 26px}.motivation>div:first-child{flex:1}.motivation>div:first-child>strong{display:block;font-size:1.15rem;margin-top:5px}.score{display:flex;align-items:baseline;gap:7px}.score strong{font-size:2.2rem;color:var(--teal);letter-spacing:-.04em}.score span{font-size:.875rem;color:var(--muted)}.achievements{display:flex;gap:9px;flex-wrap:wrap;flex-basis:100%}.achievements span{font-size:.8rem;border-radius:8px;padding:7px 12px;background:#f0f3f4;color:#617780}.achievements .earned{background:#e7f5c5;color:#345418}.point-tag{font-size:.8rem;font-weight:650;color:#196c71;margin-left:auto}.reader .quiz h3{margin-top:14px}.quiz label.answer{display:flex}.reader-footer{margin-top:24px}.block-edit>summary{line-height:1.6}.block-edit>summary::marker{color:var(--teal)}
@media(max-width:720px){.lesson-settings{grid-template-columns:1fr}.part-editor{padding:12px}.part-head{align-items:flex-start}.story-left,.story-right{float:none;width:100%;margin:16px 0}.rule-box{margin:10px;padding:14px}.motivation{padding:18px;gap:15px}.achievements{gap:5px}.achievements span{font-size:.75rem;padding:6px 8px}.sort-task li{grid-template-columns:20px 1fr auto;gap:6px}.sort-task .icon{padding:6px;min-width:35px}.adminbar{position:static}.insert-bar button{font-size:.8rem;padding:10px}.video-unit{padding:12px}}
@media(max-width:720px){.progress-card .big-number{display:block;margin-bottom:4px}.progress-card>span:not(.big-number){display:block}}
/* v3: clear service and account controls */
.service-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,320px),1fr));gap:20px;margin:24px 0}.service-grid h2{font-size:1.3rem;overflow-wrap:anywhere}.identity-label{font-size:.8rem;color:var(--muted);max-width:180px;overflow-wrap:anywhere}.quality-control{display:flex;gap:10px;align-items:center;margin:8px 0;font-size:.85rem}.quality-control select{width:auto;padding:7px 14px}.mode-tabs{flex-wrap:wrap}.mode-tabs button{font-size:.85rem;padding:9px 12px}.media-item strong{overflow-wrap:anywhere}.media-item .row{flex-wrap:wrap;margin-top:10px}.media-item .error{font-size:.8rem}.brand{max-width:65%}.brand>span:last-child{overflow-wrap:anywhere}.login-art .brand{max-width:100%}#pending-uploads .row{padding:10px 0;border-bottom:1px solid #dde7e8}.service-grid .row{flex-wrap:wrap}@media(max-width:600px){.identity-label{display:none}.brand{max-width:58%;font-size:.85rem}.brand small{font-size:.5rem}.quality-control{justify-content:flex-end}.mode-tabs button{padding:8px}.service-grid{gap:12px}.top-actions{gap:5px}.top-actions button{padding:8px 10px}}

.topbar .identity-label{color:#b9d2d8}


.three{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}
.user-filters{margin:18px 0}
.user-filters .field{margin:0}
.identity-label{font-size:.82rem;color:var(--muted);max-width:260px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
@media(max-width:850px){.three{grid-template-columns:1fr}.identity-label{display:none}}