:root{color-scheme:light;--ink:#17233c;--muted:#61708a;--blue:#255ee5;--line:#e3e8f1;--navy:#101b34;--surface:#f4f7fc;--font:"Segoe UI","Nirmala UI","Noto Sans Devanagari",system-ui,sans-serif}
*{box-sizing:border-box}body{margin:0;font-family:var(--font);font-size:16px;color:var(--ink);background:var(--surface)}button,input,select,textarea{font:inherit}button,a,input,select{touch-action:manipulation}button,a{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:var(--blue)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #82a8ff;outline-offset:3px}.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;top:-80px;left:20px;padding:12px;background:#fff;z-index:30}.skip-link:focus{top:12px}.icon{display:inline-flex;width:18px;height:18px;flex-shrink:0}.icon svg{width:100%;height:100%;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.topbar{height:82px;display:flex;align-items:center;gap:30px;padding:0 28px;background:#fff;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);min-width:192px}.brand strong{display:block;font-size:20px;letter-spacing:-.6px;line-height:1.3}.brand small{display:block;font-size:13px;color:var(--muted);margin-top:2px}.brand-mark{width:38px;height:40px;border-radius:11px;background:var(--navy);color:#85aaff;font-size:27px;line-height:40px;font-weight:700;text-align:center;position:relative}.brand-mark span{position:absolute;right:7px;top:8px;width:5px;height:5px;background:#fff;border-radius:50%}.library-label{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--muted)}.library-dot{width:7px;height:7px;border:1.5px solid #9aaaca;border-radius:50%}.button{border:1px solid var(--line);border-radius:9px;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:40px;padding:10px 14px;font-size:14px;font-weight:600;background:white;color:var(--ink);text-decoration:none;line-height:1.35}.button:hover{background:#f0f4fc;border-color:#bdcce7}.top-download{margin-left:auto}.button.primary{background:var(--blue);border-color:var(--blue);color:#fff}.button.primary:hover{background:#194fcf}.button.secondary{background:#fff;border-color:#ced8e8}.workspace{display:grid;grid-template-columns:208px 370px minmax(0,1fr);height:calc(100dvh - 82px)}
.sidebar{background:var(--navy);color:#fff;padding:30px 14px 20px;display:flex;flex-direction:column;overflow:auto}.sidebar-title{font-size:12px;letter-spacing:1.2px;color:#97a8c9;margin:0 14px 18px}.track-nav{display:flex;flex-direction:column;gap:6px}.track-button{display:flex;gap:10px;align-items:center;width:100%;border:0;border-radius:8px;padding:12px 13px;text-align:left;background:transparent;color:#bfcae0;font-size:14px;line-height:1.4}.track-button:hover{color:white;background:#1b2b49}.track-button.active{background:#2457c5;color:#fff}.track-name{flex:1}.track-count{font-variant-numeric:tabular-nums;opacity:.75;font-size:13px}.track-button .icon{width:17px;height:17px}.sidebar-note{margin:32px 14px 20px;padding-top:22px;border-top:1px solid #2d3b55;position:relative}.sidebar-note strong{font-size:14px}.sidebar-note p{font-size:14px;line-height:1.65;color:#a4b4d0;margin:8px 0 12px}.sidebar-note .text-button{color:#93b5ff;font-size:14px;padding:0}.sidebar-foot{margin-top:auto;padding:20px 14px 0;color:#7f93b5;font-size:12px;display:flex;flex-direction:column;gap:6px}.text-button{border:0;background:none;padding:6px 0;color:var(--blue);font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:7px;line-height:1.4}.text-button:hover{text-decoration:underline}
.library{display:flex;flex-direction:column;min-width:0;background:#f8faff;border-right:1px solid var(--line);overflow:hidden}.library-head{padding:25px 20px 17px;border-bottom:1px solid var(--line)}.heading-row{display:flex;gap:12px;align-items:center;margin-bottom:18px}h1{font-size:20px;letter-spacing:-.5px;margin:0;font-weight:650;line-height:1.35}.count-badge{font-size:12px;font-weight:600;min-width:26px;padding:3px 6px;border-radius:6px;background:#e8eefb;color:#4a6597;text-align:center}.search-box{border:1px solid #d4dded;border-radius:8px;background:white;display:flex;align-items:center;padding:0 10px;gap:8px;height:43px;color:#72829e}.search-box:focus-within{outline:2px solid #93b3ff;outline-offset:1px}.search-box input{min-width:0;border:0;outline:none;width:100%;background:transparent;color:var(--ink);font-size:14px}.search-box input:focus-visible{outline:none}.search-box input::placeholder{color:#7f8ca2}.search-box kbd{font-family:inherit;border:1px solid var(--line);border-radius:4px;font-size:12px;padding:1px 5px}.filter-row{display:flex;align-items:center;gap:10px;margin-top:12px;font-size:13px;color:var(--muted)}.filter-row select{flex:1;min-width:0;max-width:185px;border:0;background:transparent;font-size:14px;color:var(--ink);padding:4px 0;cursor:pointer}.reset-button{border:0;background:none;font-size:13px;color:var(--blue);padding:4px}.lesson-list{overflow:auto;flex:1;padding:10px;scrollbar-width:thin;scrollbar-color:#b7c5dc transparent}.lesson-item{display:block;border:1px solid transparent;width:100%;padding:15px 13px;border-radius:9px;background:transparent;text-align:left;margin-bottom:4px;position:relative;color:var(--ink)}.lesson-item:hover{background:#edf2fc}.lesson-item.active{background:#fff;border-color:#abc5ff;box-shadow:0 3px 10px #0b285709}.lesson-item.active:before{content:"";position:absolute;top:17px;left:-1px;height:24px;width:3px;background:var(--blue);border-radius:0 3px 3px 0}.item-top{display:flex;align-items:center;gap:8px;margin-bottom:9px;font-size:12px;color:#6981a5}.item-number{font-variant-numeric:tabular-nums;letter-spacing:.5px;font-weight:600}.item-group{font-size:12px}.pilot-chip{margin-left:auto;font-size:11px;letter-spacing:.3px;color:#246b4f;background:#e4f3eb;border-radius:4px;padding:3px 5px;font-weight:600}.item-title{display:block;font-size:16px;line-height:1.65;font-weight:600;letter-spacing:0;margin-bottom:10px}.item-foot{display:flex;justify-content:space-between;gap:10px;font-size:12px;color:var(--muted)}.list-footer{padding:12px 20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:10px;font-size:12px;color:var(--muted)}.empty{padding:36px 22px;color:var(--muted);line-height:1.65}.empty strong{color:var(--ink);display:block;margin-bottom:8px;font-size:17px}
.reader{display:flex;flex-direction:column;min-width:0;background:#fff;overflow:hidden;outline:none}.reader-header{padding:29px 36px 24px}.lesson-eyebrow{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px;line-height:1.4;margin-bottom:13px}.lesson-eyebrow .divider{color:#b6c3d8}.reader h2{font-size:26px;font-weight:650;line-height:1.55;letter-spacing:-.3px;max-width:850px;margin:0 0 17px}.lesson-meta{display:flex;gap:17px;align-items:center;flex-wrap:wrap;font-size:14px;color:var(--muted)}.presenter-pill{display:inline-flex;align-items:center;gap:7px;color:#475c81}.presenter-initial{display:flex;align-items:center;justify-content:center;background:#e8effd;color:#2c59b0;font-size:12px;font-weight:700;width:25px;height:25px;border-radius:7px}.approved-tag{display:inline-flex;align-items:center;gap:6px;color:#26734e;background:#e9f6ef;padding:4px 7px;border-radius:5px;font-size:12px;font-weight:600}.reader-actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:23px}.reader-actions .button{min-height:42px}.tabs{display:flex;gap:24px;padding:0 36px;border-bottom:1px solid var(--line)}.tab{color:var(--muted);font-size:14px;border:0;background:transparent;padding:13px 0 15px;position:relative;font-weight:600;white-space:nowrap}.tab:hover{color:var(--ink)}.tab.active{color:var(--blue)}.tab.active:after{content:"";height:3px;position:absolute;bottom:-1px;left:0;right:0;background:var(--blue);border-radius:3px 3px 0 0}.reader-content{overflow:auto;flex:1;min-height:150px;padding:27px 36px 45px;scrollbar-width:thin;scrollbar-color:#b7c5dc transparent}.content-note{font-size:13px;color:var(--muted);margin-bottom:26px;line-height:1.6;display:flex;align-items:center;gap:7px}.narration{max-width:820px;margin:0}.narration p{margin:0 0 17px;font-size:18px;line-height:1.95;color:#35425a;overflow-wrap:anywhere}.narration p.english{padding:11px 17px;border-left:3px solid #517ce6;background:#f0f5ff;font-size:19px;line-height:1.6;color:#1b428f;font-weight:550;border-radius:0 7px 7px 0;margin:7px 0 18px;white-space:pre-wrap}.reader-footer{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 36px;border-top:1px solid var(--line);font-size:12px;color:var(--muted);background:#fcfdff;min-height:49px}.reader-footer .icon{width:15px;height:15px}.markdown{max-width:850px;font-size:16px;line-height:1.8;overflow-wrap:anywhere;color:#35425a}.markdown h1,.markdown h2,.markdown h3{font-size:19px;font-weight:650;margin:24px 0 13px;color:var(--ink);line-height:1.6;letter-spacing:0}.markdown h2{padding-top:12px;border-top:1px solid var(--line)}.markdown h3{font-size:16px;margin:20px 0 9px;color:#255199}.markdown p{margin:0 0 15px;white-space:pre-line}.markdown ul,.markdown ol{padding-left:24px;margin:12px 0 21px}.markdown li{padding-left:2px;margin-bottom:10px}.markdown hr{border:0;border-top:1px solid var(--line);margin:25px 0}.markdown strong{font-weight:650}.scene-list{display:flex;flex-direction:column;gap:12px;max-width:850px}.scene{border:1px solid var(--line);border-radius:9px;overflow:hidden}.scene summary{padding:16px 17px;display:flex;justify-content:space-between;align-items:center;gap:12px;cursor:pointer;font-size:16px;font-weight:600;color:var(--ink);list-style:none;line-height:1.5;background:#fbfcff}.scene summary::-webkit-details-marker{display:none}.scene summary:after{content:"+";font-size:21px;font-weight:400;color:#6b83ac}.scene[open] summary:after{content:"−"}.scene[open] summary{border-bottom:1px solid var(--line)}.scene-body{padding:20px}.scene-narration{border-left:2px solid #b5caf6;padding-left:17px;margin-bottom:21px}.scene-narration p{font-size:16px;line-height:1.9;margin:0 0 12px}.scene-body .markdown{font-size:14px;line-height:1.8}.scene-body .markdown h3{font-size:14px;margin-top:16px}.toast{position:fixed;bottom:28px;left:50%;transform:translate(-50%,15px);border-radius:10px;padding:14px 21px;background:#12223f;color:#fff;font-size:14px;box-shadow:0 7px 30px #0e193734;opacity:0;pointer-events:none;z-index:50;max-width:calc(100vw - 32px);transition:opacity .15s,transform .15s}.toast.visible{opacity:1;transform:translate(-50%,0)}.copy-dialog{width:min(680px,calc(100vw - 32px));border:1px solid var(--line);border-radius:13px;padding:24px;color:var(--ink);box-shadow:0 20px 80px #0004}.copy-dialog::backdrop{background:#101b3480}.dialog-header{display:flex;align-items:center;justify-content:space-between;gap:12px}.dialog-header h2{margin:0;font-size:21px}.copy-dialog p{color:var(--muted);font-size:14px;line-height:1.7}.copy-dialog textarea{width:100%;height:300px;border:1px solid var(--line);border-radius:7px;padding:13px;resize:vertical;font-size:15px;line-height:1.8}.icon-button{background:transparent;border:0;padding:8px;color:var(--muted);display:inline-flex}.noscript{padding:25px;position:fixed;bottom:0;width:100%;background:#fff;border-top:1px solid var(--line);z-index:10}
@media(min-width:1700px){.workspace{grid-template-columns:225px 410px minmax(0,1fr)}.reader-header{padding-left:52px;padding-right:52px}.tabs{padding-left:52px}.reader-content{padding-left:52px}.reader-footer{padding-left:52px}}
@media(max-width:1200px){.workspace{grid-template-columns:178px 310px minmax(0,1fr)}.topbar{padding:0 20px}.sidebar{padding-left:8px;padding-right:8px}.track-button{padding:11px 9px;gap:8px}.track-button .icon{display:none}.reader-header{padding:24px}.reader h2{font-size:23px}.tabs{padding:0 24px;gap:20px}.reader-content{padding:23px 24px 35px}.reader-footer{padding:10px 24px}.reader-actions .button{font-size:13px;padding:9px 11px}.narration p{font-size:17px}.narration p.english{font-size:18px}}
@media(max-width:950px){.workspace{grid-template-columns:310px minmax(0,1fr);grid-template-rows:auto minmax(0,1fr)}.sidebar{grid-column:1/-1;display:block;padding:10px 15px;overflow:auto}.sidebar-title,.sidebar-note,.sidebar-foot{display:none}.track-nav{flex-direction:row;width:max-content;gap:5px}.track-button{width:auto;white-space:nowrap;padding:8px 12px}.track-count{font-size:12px}.reader,.library{min-height:0}.topbar{height:74px;gap:18px}.workspace{height:calc(100dvh - 74px)}.library-label{font-size:13px}.brand{min-width:155px}.brand strong{font-size:19px}.top-download{font-size:13px;padding:9px 11px}.reader-header{padding:23px 21px 20px}.reader h2{font-size:22px}.lesson-meta{gap:12px}.tabs{padding:0 21px;gap:18px}.reader-content{padding:23px 21px 35px}.reader-actions{gap:7px}.reader-actions .button{font-size:13px}.reader-actions .icon{width:15px;height:15px}}
@media(max-width:720px){.topbar{height:70px;padding:0 16px}.brand{min-width:0}.brand-mark{width:33px;height:35px;line-height:35px;font-size:24px}.brand strong{font-size:18px}.brand small{font-size:12px}.library-label{display:none}.top-download{padding:9px;min-height:36px;font-size:12px}.top-download .icon{width:15px;height:15px}.workspace{height:auto;display:flex;flex-direction:column}.sidebar{flex-shrink:0;padding:10px 12px}.track-button{font-size:13px}.library{border-right:0;border-bottom:1px solid var(--line)}.library-head{padding:17px 16px 12px}.heading-row{margin-bottom:12px}h1{font-size:18px}.filter-row{margin-top:8px}.lesson-list{display:flex;gap:9px;padding:12px 16px;overflow:auto;flex:none;scroll-snap-type:x proximity}.lesson-item{width:255px;min-width:255px;padding:12px;background:#fff;border-color:var(--line);scroll-snap-align:start;margin-bottom:0}.item-title{font-size:15px;line-height:1.65;margin-bottom:9px;min-height:50px}.item-foot{font-size:12px}.item-group{font-size:11px}.item-top{margin-bottom:6px}.list-footer{padding:8px 16px}.reader{min-height:560px;overflow:visible}.reader-header{padding:23px 20px 20px}.reader h2{font-size:22px;line-height:1.7}.lesson-eyebrow{font-size:12px}.lesson-meta{font-size:13px}.reader-actions{margin-top:19px;gap:8px}.reader-actions .button{flex:1;font-size:13px;min-height:42px;padding:10px 9px}.tabs{padding:0 20px;gap:24px;overflow:auto}.tab{font-size:14px}.reader-content{overflow:visible;padding:22px 20px 35px;min-height:0}.narration p{font-size:17px;line-height:1.95}.narration p.english{font-size:18px;line-height:1.7;padding:10px 13px}.reader-footer{padding:10px 20px}.markdown{font-size:16px;line-height:1.85}.content-note{font-size:12px;margin-bottom:22px}.scene-body{padding:16px}.scene summary{font-size:15px}.empty{min-width:300px;padding:15px}.search-box kbd{display:none}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}