:root{font-family:Onest,Manrope,system-ui,sans-serif;color:#e8eeeb;background:#090c0d;font-synthesis:none;text-rendering:optimizeLegibility;--bg:#090c0d;--panel:#111718;--panel2:#151d1c;--line:rgba(216,236,225,.09);--muted:#8a9992;--green:#83d6ad;--gold:#d7b978;--blue:#81c9df;--white:#edf4f0}*{box-sizing:border-box}body{margin:0;min-width:320px;background:radial-gradient(ellipse at 76% 0%,rgba(47,101,79,.13),transparent 32%),#090c0d;color:var(--white)}button,input,textarea{font:inherit}button{cursor:pointer;color:inherit}a{color:inherit;text-decoration:none}.app-shell{min-height:100vh;display:flex}.sidebar{width:258px;flex-shrink:0;border-right:1px solid var(--line);background:#0b0f0fe6;-webkit-backdrop-filter:blur(22px);backdrop-filter:blur(22px);padding:27px 18px 18px;display:flex;flex-direction:column;position:fixed;inset:0 auto 0 0;z-index:10}.brand{display:flex;align-items:center;gap:11px;padding:0 9px 37px}.brand-mark{width:39px;height:39px;border:1px solid rgba(131,214,173,.35);border-radius:13px;display:grid;place-items:center;color:var(--green);background:linear-gradient(145deg,#83d6ad2b,#83d6ad06);box-shadow:0 0 24px #58bb8a17}.brand b{font-size:13px;letter-spacing:2px;display:block}.brand span{font-size:8px;letter-spacing:2.1px;color:#83918b;display:block;margin-top:4px}.workspace-label,.nav-section-head,.eyebrow,.section-kicker,.field-label{font-size:9px;letter-spacing:1.7px;color:#74837c;font-weight:700}.workspace-label{padding:0 10px 13px}.nav-link,.subject-link{height:43px;width:100%;display:flex;align-items:center;gap:12px;border:0;background:transparent;color:#9aa8a1;padding:0 11px;border-radius:10px;text-align:left;font-size:12px;margin-bottom:4px;transition:.2s}.nav-link:hover,.subject-link:hover{background:#ffffff0b;color:#eef7f1}.nav-link.active{color:var(--green);background:linear-gradient(90deg,#5fb18424,#5fb18409);box-shadow:inset 2px 0 #7bd0a4}.nav-section-head{display:flex;justify-content:space-between;align-items:center;padding:30px 10px 12px}.tiny-count{font-size:9px;color:#60736a}.subject-link{height:58px;gap:10px}.subject-link>span:nth-child(2){flex:1;min-width:0}.subject-link b{display:block;color:#dce7e1;font-size:11px}.subject-link small{display:block;color:#7c8983;font-size:9px;margin-top:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.subject-dot,.live-dot{width:7px;height:7px;border-radius:50%;background:#7fd5a8;box-shadow:0 0 12px #7fd5a866;flex-shrink:0}.library-head{padding-top:25px}.sidebar-bottom{margin-top:auto}.status-card{border:1px solid rgba(131,214,173,.13);background:linear-gradient(135deg,#5da67c17,#ffffff04);padding:13px;border-radius:12px;margin:0 3px 17px}.status-line{display:flex;align-items:center;gap:7px;font-size:8px;letter-spacing:1px;color:#a9c5b5;font-weight:700}.status-card p{font-size:10px;color:#84948b;line-height:1.55;margin:9px 0 0}.sidebar-foot{border-top:1px solid var(--line);margin:18px 7px 0;padding-top:14px;display:flex;justify-content:space-between;color:#58665f;font-size:8px;letter-spacing:1px}.main-area{margin-left:258px;width:calc(100% - 258px);min-height:100vh;display:flex;flex-direction:column}.topbar{height:72px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 clamp(24px,4.5vw,68px);background:#090c0d80;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);position:sticky;top:0;z-index:5}.crumb{display:flex;align-items:center;gap:9px;color:#6f7e77;font-size:10px}.crumb span{color:#c6d2cb}.top-actions{display:flex;align-items:center;gap:15px}.secure-pill{font-size:8px;letter-spacing:1.2px;color:#93bca5;border:1px solid rgba(131,214,173,.2);padding:7px 10px;border-radius:20px;display:flex;gap:7px;align-items:center}.avatar{height:30px;width:30px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,#b2d9bd,#4f8c70);color:#0d1812;font-weight:800;font-size:12px}.content-wrap{width:min(1160px,100%);margin:0 auto;padding:51px clamp(24px,4.5vw,68px) 70px;flex:1}.main-footer{border-top:1px solid var(--line);padding:19px clamp(24px,4.5vw,68px);display:flex;justify-content:space-between;color:#627169;font-size:8px;letter-spacing:1.3px}.main-footer i{color:var(--green);font-style:normal}.main-footer span:last-child{display:flex;align-items:center;gap:6px;letter-spacing:.3px}.welcome-row{display:flex;justify-content:space-between;align-items:center;min-height:220px}.eyebrow{display:flex;align-items:center;gap:10px;color:#88aa98}.eyebrow-line{width:20px;height:1px;background:var(--green);display:inline-block}.welcome-row h1,.subject-page-head h1,.lesson-hero h1,.page-title{font-size:clamp(32px,4vw,49px);line-height:1.13;letter-spacing:-2px;margin:17px 0 13px;font-weight:600}.welcome-row h1 em,.login-panel h1 em{font-style:normal;color:var(--green)}.lead{font-size:13px;color:#8d9c94;line-height:1.7;max-width:590px;margin:0}.welcome-orb{width:165px;height:165px;position:relative;margin-right:8%;display:grid;place-items:center}.orb-core{width:83px;height:83px;border-radius:50%;display:grid;place-items:center;color:var(--green);background:radial-gradient(circle at 35% 25%,#8ce0b247,#285c441f 62%,#0d171299);border:1px solid rgba(131,214,173,.35);box-shadow:0 0 60px #5abc8426,inset 0 0 20px #83d6ad1a;z-index:1}.orb-ring{position:absolute;border:1px solid rgba(131,214,173,.13);border-radius:50%;top:0;right:0;bottom:0;left:0}.ring2{top:18px;right:18px;bottom:18px;left:18px;border-style:dashed;border-color:#d7b9782e}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:13px;margin:27px 0 53px}.stat-card{padding:17px 19px 16px;border:1px solid var(--line);border-radius:13px;background:linear-gradient(145deg,#ffffff0b,#ffffff03);min-height:120px}.stat-top{display:flex;align-items:center;gap:9px;color:#84938b}.stat-top svg{width:16px;color:var(--green)}.stat-top span{font-size:8px;letter-spacing:1.3px}.stat-value{font-size:27px;font-weight:600;letter-spacing:-1px;margin:12px 0 1px}.stat-hint{font-size:9px;color:#728078}.section-heading{display:flex;align-items:end;justify-content:space-between;margin:0 0 18px}.section-heading h2{font-size:21px;font-weight:600;letter-spacing:-.5px;margin:7px 0 0}.text-btn{border:0;background:transparent;color:var(--green);font-size:11px;display:flex;align-items:center;gap:8px;padding:8px}.subject-feature{border:1px solid rgba(131,214,173,.17);border-radius:16px;padding:24px 26px 19px;background:radial-gradient(ellipse at 86% 20%,rgba(92,170,128,.14),transparent 37%),linear-gradient(120deg,#14231ceb,#0f1614cc);position:relative;overflow:hidden}.feature-top{display:flex;align-items:center;gap:12px}.feature-icon{height:39px;width:39px;border:1px solid rgba(131,214,173,.2);background:#83d6ad14;border-radius:11px;display:grid;place-items:center;color:var(--green)}.feature-tag{font-size:8px;letter-spacing:1.5px;color:#91bca2}.feature-code{margin-left:auto;font-size:9px;letter-spacing:1.6px;color:#6e8175}.subject-feature h3{font-size:22px;letter-spacing:-.6px;margin:19px 0 7px;font-weight:600}.subject-feature>p{color:#899990;font-size:11px;margin:0;max-width:620px}.feature-bottom{display:flex;align-items:center;gap:13px;margin-top:22px}.mini-progress{height:3px;width:130px;background:#26342d;border-radius:4px;overflow:hidden}.mini-progress span{height:100%;display:block;background:var(--green);border-radius:4px}.feature-bottom>span{font-size:9px;color:#829087}.round-arrow{margin-left:auto;width:34px;height:34px;border-radius:50%;border:1px solid rgba(131,214,173,.3);background:#83d6ad14;color:var(--green);display:grid;place-items:center}.recent-heading{margin-top:49px}.soft-btn,.primary-btn{border-radius:9px;padding:10px 14px;font-size:10px;display:inline-flex;align-items:center;gap:8px;transition:.2s}.soft-btn{border:1px solid rgba(131,214,173,.2);background:#83d6ad12;color:#b6d9c3}.soft-btn:hover{background:#83d6ad21}.primary-btn{border:1px solid #8ed9ad;background:linear-gradient(135deg,#9be2b8,#66b98b);color:#0a1b12;font-weight:800}.primary-btn:hover{filter:brightness(1.08)}.primary-btn:disabled{opacity:.6}.lesson-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:13px}.lesson-card{padding:18px 19px 15px;border:1px solid var(--line);border-radius:13px;background:linear-gradient(145deg,#ffffff0a,#ffffff03);text-align:left;transition:.2s}.lesson-card:hover{border-color:#83d6ad4d;transform:translateY(-2px);background:linear-gradient(145deg,#4b8b671c,#ffffff05)}.lesson-card-top{display:flex;justify-content:space-between;align-items:center}.lesson-number,.lesson-status{font-size:8px;letter-spacing:1.3px;color:#809187}.lesson-status{display:flex;align-items:center;gap:6px;color:#8dc7a3}.lesson-status i,.published i{width:5px;height:5px;border-radius:50%;background:#82d5a4}.lesson-card h3{font-size:15px;line-height:1.45;font-weight:600;margin:17px 0 6px;max-width:400px}.lesson-card>p{font-size:10px;color:#84938a;margin:0;min-height:30px}.lesson-card-bottom{border-top:1px solid var(--line);margin-top:16px;padding-top:12px;display:flex;align-items:center;justify-content:space-between;color:#819087;font-size:9px}.lesson-card-bottom>span:first-child{display:flex;align-items:center;gap:6px}.card-arrow{height:27px;width:27px;border:1px solid var(--line);border-radius:50%;display:grid;place-items:center;color:var(--green)}.page-enter{animation:enter .35s ease both}@keyframes enter{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.back-link{border:0;background:transparent;color:#8ca99a;font-size:9px;letter-spacing:1.3px;display:flex;align-items:center;gap:8px;padding:0;margin:0 0 27px}.subject-page-head{display:flex;justify-content:space-between;align-items:center;gap:25px}.subject-page-head h1{max-width:680px;font-size:clamp(30px,3.5vw,42px)}.subject-stamp{width:118px;height:118px;border:1px solid rgba(131,214,173,.2);border-radius:50%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;color:var(--green);background:radial-gradient(circle,rgba(131,214,173,.09),transparent 70%);flex-shrink:0}.subject-stamp span{font-size:7px;letter-spacing:1.5px;text-align:center;line-height:1.5}.toolbar-row{display:flex;justify-content:space-between;align-items:center;margin:39px 0 15px;gap:15px}.search-box{height:40px;border:1px solid var(--line);border-radius:9px;display:flex;align-items:center;gap:9px;padding:0 12px;width:min(330px,100%);color:#75857c;background:#ffffff05}.search-box input{background:transparent;border:0;outline:0;color:var(--white);font-size:11px;width:100%}.subject-list{border-top:1px solid var(--line)}.subject-lesson-row{width:100%;border:0;border-bottom:1px solid var(--line);background:transparent;display:flex;align-items:center;text-align:left;gap:18px;padding:19px 10px;transition:.2s}.subject-lesson-row:hover{background:#83d6ad0b}.row-index{font-size:18px;color:#789b86;font-weight:500;width:35px}.row-main{flex:1}.row-main b{display:block;font-size:12px;font-weight:600}.row-main small{display:block;color:#77867e;font-size:9px;margin-top:5px}.row-duration{font-size:9px;color:#809087;display:flex;align-items:center;gap:6px}.subject-lesson-row>svg{color:#779183}.lesson-hero{padding:6px 0 26px;border-bottom:1px solid var(--line)}.lesson-hero h1{max-width:850px;font-size:clamp(31px,4vw,46px);margin:16px 0 9px}.lesson-meta{display:flex;align-items:center;gap:19px;margin-top:20px;color:#84948b;font-size:9px}.lesson-meta span{display:flex;align-items:center;gap:6px}.lesson-meta .published{color:#91cba6}.lesson-actions{display:flex;gap:9px;margin-top:22px}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 215px;gap:38px;padding-top:27px}.article-content{min-width:0}.intro-card{padding:20px 22px;border:1px solid rgba(131,214,173,.17);border-radius:12px;background:linear-gradient(110deg,#46825d1f,#ffffff05);margin-bottom:34px}.intro-label{font-size:8px;letter-spacing:1.6px;color:#91c6a4}.intro-card p{font-size:13px;line-height:1.7;color:#c3d1c8;margin:10px 0 0}.content-section{margin:0 0 37px;scroll-margin-top:95px}.section-kicker{color:#759782}.content-section h2,.board-section h2,.questions-section h2,.homework-section h2,.media-section h2{font-size:20px;font-weight:600;letter-spacing:-.5px;margin:8px 0 15px}.definition-card{border-left:2px solid var(--gold);background:linear-gradient(90deg,#d7b97817,#ffffff04);padding:17px 20px;border-radius:0 10px 10px 0}.definition-card span{font-size:8px;letter-spacing:1.5px;color:var(--gold)}.definition-card p,.content-section>p{font-size:12px;line-height:1.8;color:#c1cec6;margin:8px 0 0}.diagram-card{padding:20px;border:1px solid rgba(129,201,223,.17);border-radius:12px;background:linear-gradient(130deg,#458fa417,#ffffff03);overflow:hidden}.diagram-flow{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:8px}.diagram-flow>svg{color:#77c4d8;flex-shrink:0}.diagram-node{padding:10px 12px;border:1px solid rgba(129,201,223,.2);border-radius:8px;background:#81c9df12;color:#c6e5ec;font-size:9px;text-align:center}.diagram-card>p{color:#8caaa9;font-size:10px;line-height:1.6;margin:15px 0 0}.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.compare-grid>div{padding:17px;border:1px solid var(--line);border-radius:10px;background:#ffffff05}.compare-grid>div:first-child{border-top:2px solid var(--gold)}.compare-grid>div:last-child{border-top:2px solid var(--blue)}.compare-grid span{font-size:8px;letter-spacing:1.3px;color:#a7b9ae}.compare-grid p{font-size:11px;line-height:1.7;color:#aebdb4;margin:10px 0 0}.timeline{border-left:1px solid rgba(131,214,173,.25);margin-left:9px;padding-left:22px}.timeline-item{position:relative;padding:0 0 19px;display:flex;gap:13px}.timeline-item:before{content:"";position:absolute;width:7px;height:7px;border-radius:50%;background:var(--green);left:-26px;top:5px;box-shadow:0 0 12px #83d6ad66}.timeline-item>span{font-size:9px;color:#7eaa90}.timeline-item b{font-size:11px}.timeline-item p{font-size:10px;color:#85948c;margin:4px 0 0}.formula-card{border:1px solid rgba(129,201,223,.17);border-radius:12px;padding:19px;background:#5196ab0e}.formula-card p{font-size:11px;line-height:1.7;color:#b7c8c4;margin:0}.formula{font-size:clamp(20px,3vw,28px);font-weight:600;letter-spacing:1px;color:#9cdeed;text-align:center;padding:21px 5px;font-family:Manrope,serif}.formula-card small,.range-table small{font-size:9px;color:#7e9691}.example-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.example-grid>div{border:1px solid var(--line);border-radius:10px;padding:14px;background:#ffffff05}.example-grid span{display:block;font-size:7px;letter-spacing:1.4px;color:var(--gold)}.example-grid b{display:block;font-size:13px;margin:10px 0}.example-grid p{font-size:10px;line-height:1.6;color:#a6b5ad;margin:0}.range-table{border:1px solid var(--line);border-radius:10px;overflow:hidden}.range-table table{width:100%;border-collapse:collapse;text-align:left}.range-table th{font-size:8px;letter-spacing:1.3px;color:#8fbda0;background:#83d6ad12}.range-table td,.range-table th{padding:11px 15px;border-bottom:1px solid var(--line)}.range-table td{font-size:10px;color:#c1cec6}.range-table tr:last-child td{border-bottom:0}.range-table small{display:block;padding:10px 15px;background:#ffffff04}.clean-list{list-style:none;padding:0;margin:0}.clean-list li{position:relative;padding:9px 10px 9px 23px;border-bottom:1px solid rgba(255,255,255,.05);font-size:11px;line-height:1.6;color:#b7c5bc}.clean-list li:before{content:"";position:absolute;left:4px;top:16px;width:5px;height:5px;border-radius:50%;background:var(--green)}.note-card{display:flex;gap:12px;align-items:flex-start;padding:15px 17px;border:1px solid rgba(215,185,120,.17);border-radius:10px;background:#d7b9780e;color:var(--gold)}.note-card p{font-size:11px;line-height:1.7;color:#c9bfa9;margin:0}.board-section,.questions-section,.homework-section,.media-section{margin:42px 0}.board-card,.homework-card{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#ffffff05}.board-card>div,.homework-card>div{display:flex;gap:14px;padding:13px 16px;border-bottom:1px solid var(--line);align-items:flex-start}.board-card>div:last-child,.homework-card>div:last-child{border-bottom:0}.board-card span,.homework-card span{font-size:9px;color:#85b698;padding-top:2px}.board-card p,.homework-card p{font-size:11px;line-height:1.6;color:#bfccc4;margin:0}.question-item{border-bottom:1px solid var(--line);padding:13px 2px}.question-item summary{display:flex;align-items:center;gap:10px;list-style:none;cursor:pointer;font-size:11px;color:#c9d5ce}.question-item summary::-webkit-details-marker{display:none}.question-item summary svg:first-child{color:var(--blue)}.question-item summary span{flex:1}.question-item[open] summary>svg:last-child{transform:rotate(180deg)}.question-item>p{margin:12px 0 4px 28px;color:#8fc6a4;font-size:11px;line-height:1.6}.media-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.media-card{border:1px solid var(--line);border-radius:11px;overflow:hidden;background:#ffffff05}.video-frame{aspect-ratio:16/9;background:#050808}.video-frame iframe{width:100%;height:100%;border:0}.external-media{height:90px;background:linear-gradient(120deg,#81c9df1a,#ffffff03);display:flex;align-items:center;justify-content:center;gap:9px;color:var(--blue)}.external-media span{font-size:10px}.media-card-copy{padding:13px}.media-card-copy>span{display:block;color:#7fae92;font-size:8px;letter-spacing:1px}.media-card-copy b{display:block;font-size:11px;margin:7px 0 10px}.media-card-copy a{display:flex;align-items:center;gap:5px;color:#8dc8a3;font-size:9px}.lesson-aside{padding-top:8px}.aside-card{position:sticky;top:96px;border:1px solid var(--line);border-radius:11px;padding:15px;background:#ffffff05}.aside-label{font-size:8px;letter-spacing:1.4px;color:#8fa296;display:block;margin-bottom:12px}.aside-card a{display:flex;gap:9px;padding:8px 0;font-size:9px;color:#a3b1a9;line-height:1.4}.aside-card a span{color:#7bb08f}.aside-tip{margin-top:13px;padding:14px;border:1px solid rgba(215,185,120,.14);border-radius:11px;background:#d7b9780b}.aside-tip svg{color:var(--gold)}.aside-tip b{display:block;font-size:10px;margin:8px 0}.aside-tip p{font-size:9px;color:#9c9d8e;line-height:1.6;margin:0}.editor-shell{padding-top:24px}.editor-notice{display:flex;align-items:center;gap:9px;padding:12px 14px;border:1px solid rgba(129,201,223,.15);background:#81c9df0d;border-radius:9px;color:#9bcbd5;font-size:10px;margin-bottom:23px}.title-edit,.subtitle-edit{width:100%;border:1px solid rgba(131,214,173,.2);border-radius:8px;background:#ffffff08;padding:10px;color:var(--white);font-size:24px;margin-top:12px}.subtitle-edit{font-size:13px}.field-label{display:block;margin:17px 0 9px}.wide-textarea,.media-inputs input{width:100%;background:#ffffff06;border:1px solid var(--line);border-radius:8px;color:#dce8e0;padding:12px;font-size:11px;line-height:1.7;resize:vertical;outline:none}.wide-textarea:focus,.media-inputs input:focus{border-color:#83d6ad66}.editor-toolbar{display:flex;flex-wrap:wrap;gap:5px;padding:9px;border:1px solid var(--line);border-radius:9px 9px 0 0;background:#121a17;margin-top:20px}.editor-toolbar button{border:1px solid transparent;background:transparent;border-radius:5px;padding:7px 9px;color:#9eafa4;font-size:10px}.editor-toolbar button:hover,.editor-toolbar .tool-active{background:#83d6ad1a;color:var(--green)}.tiptap-area{border:1px solid var(--line);border-top:0;border-radius:0 0 9px 9px;background:#ffffff05;min-height:280px;padding:22px}.tiptap{outline:0;min-height:230px;font-size:12px;line-height:1.8;color:#c8d5cd}.tiptap h2{font-size:20px;color:#e9f3ec}.tiptap p{margin:8px 0}.tiptap ul,.tiptap ol{padding-left:20px}.tiptap blockquote{border-left:2px solid var(--gold);padding-left:13px;color:#c6b991}.tiptap img{max-width:100%;border-radius:9px}.editor-fields{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin-top:12px}.media-editor{border:1px solid var(--line);border-radius:10px;padding:15px;margin-top:19px}.media-inputs{display:grid;grid-template-columns:1fr 1.5fr auto;gap:8px}.media-inputs input{min-width:0}.media-edit-row{display:flex;align-items:center;gap:10px;border-top:1px solid var(--line);margin-top:12px;padding-top:10px;font-size:10px}.media-edit-row span{color:var(--green)}.media-edit-row b{flex:1;font-weight:500}.media-edit-row button{border:0;background:transparent;color:#9daba3}.editor-bottom{display:flex;align-items:center;justify-content:space-between;margin-top:20px;color:#83948a;font-size:10px}.library-list{border-top:1px solid var(--line);margin-top:35px}.library-row{width:100%;display:flex;align-items:center;gap:15px;text-align:left;border:0;border-bottom:1px solid var(--line);background:transparent;padding:16px 8px}.library-row:hover{background:#83d6ad0a}.library-icon{height:39px;width:39px;border:1px solid rgba(129,201,223,.18);border-radius:10px;display:grid;place-items:center;color:var(--blue);background:#81c9df0f}.library-row>div:nth-child(2){flex:1}.library-row span{display:block;color:#83ad94;font-size:8px;letter-spacing:1px}.library-row b{display:block;font-size:11px;margin-top:5px}.library-row>svg{color:#84948b}.page-title{margin-bottom:10px}.page-title em{font-style:normal;color:var(--green)}.mobile-menu,.mobile-close,.scrim{display:none}.boot{height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:17px;color:#9eafa5;font-size:11px;letter-spacing:1px}.loader-orb{width:42px;height:42px;border-radius:50%;border:1px solid rgba(131,214,173,.2);border-top-color:var(--green);animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.login-screen{min-height:100vh;display:grid;place-items:center;position:relative;overflow:hidden;background:radial-gradient(ellipse at 51% 42%,rgba(40,94,68,.2),transparent 36%),#080c0c;padding:25px}.login-glow{position:absolute;border-radius:50%;filter:blur(80px);opacity:.18;pointer-events:none}.glow-a{width:350px;height:350px;background:#317b57;left:5%;top:10%}.glow-b{width:300px;height:300px;background:#286b83;right:3%;bottom:3%;opacity:.12}.login-panel{width:min(455px,100%);padding:42px 43px 29px;border:1px solid rgba(197,229,207,.13);border-radius:20px;background:linear-gradient(145deg,#1b2822d4,#0c1210eb);-webkit-backdrop-filter:blur(28px);backdrop-filter:blur(28px);box-shadow:0 30px 100px #00000059;position:relative}.login-brand{display:flex;align-items:center;gap:12px;font-size:12px;letter-spacing:2px}.login-brand b{color:var(--green);font-weight:500}.login-eyebrow{display:flex;align-items:center;gap:9px;margin-top:48px;color:#8fb39b;font-size:8px;letter-spacing:1.5px}.login-panel h1{font-size:39px;line-height:1.15;letter-spacing:-1.8px;margin:18px 0 12px;font-weight:600}.login-copy{font-size:11px;color:#8e9d94;line-height:1.7;margin:0 0 31px}.login-panel label{font-size:8px;letter-spacing:1.5px;color:#a0b2a7;font-weight:700}.password-wrap{height:49px;display:flex;align-items:center;gap:10px;border:1px solid rgba(196,225,204,.16);background:#0000002e;border-radius:9px;padding:0 7px 0 13px;margin-top:9px;color:#88aa95}.password-wrap:focus-within{border-color:#83d6ad7a}.password-wrap input{flex:1;min-width:0;border:0;outline:0;background:transparent;color:#eaf3ed;font-size:11px}.password-wrap input::placeholder{color:#66756c}.password-wrap button{width:35px;height:35px;border:0;border-radius:7px;background:#83d6ad;color:#0c1c13;display:grid;place-items:center}.login-error{color:#e4a59b;font-size:10px;margin-top:10px}.login-bottom{display:flex;justify-content:space-between;border-top:1px solid var(--line);margin-top:37px;padding-top:16px;color:#64736a;font-size:7px;letter-spacing:1.3px}.login-bottom span:last-child{display:flex;align-items:center;gap:7px}.login-bottom i{width:5px;height:5px;background:#80d5a4;border-radius:50%}.login-caption{position:absolute;bottom:25px;color:#53635a;font-size:8px;letter-spacing:2px}.login-caption span{margin-left:12px;color:#3c4a42}.toast{position:fixed;bottom:25px;right:25px;padding:13px 17px;border:1px solid rgba(131,214,173,.24);border-radius:10px;background:#15221a;color:#a9dfba;font-size:11px;display:flex;gap:9px;align-items:center;box-shadow:0 10px 40px #0008;z-index:30}@media(max-width:1000px){.lesson-layout{grid-template-columns:minmax(0,1fr) 180px;gap:22px}.content-wrap{padding-left:32px;padding-right:32px}.welcome-orb{margin-right:1%}}@media(max-width:760px){.sidebar{transform:translate(-100%);transition:transform .25s ease;width:270px}.sidebar.mobile-open{transform:translate(0)}.scrim{display:block;position:fixed;top:0;right:0;bottom:0;left:0;background:#0000008c;z-index:9}.mobile-menu{display:grid}.mobile-close{display:grid;margin-left:auto}.main-area{margin-left:0;width:100%}.topbar{height:61px;padding:0 18px}.content-wrap{padding:35px 20px 55px}.top-actions{gap:9px}.secure-pill{font-size:7px;padding:6px 8px}.crumb{font-size:9px}.welcome-row{min-height:185px}.welcome-orb{width:105px;height:105px;margin:0}.orb-core{width:62px;height:62px}.stats-grid{gap:8px;margin:20px 0 40px}.stat-card{padding:13px 11px;min-height:108px}.stat-top{gap:6px}.stat-top span{font-size:7px;letter-spacing:.8px}.stat-value{font-size:23px}.stat-hint{font-size:8px}.lesson-grid{grid-template-columns:1fr}.lesson-card{padding:16px}.subject-page-head{align-items:flex-start}.subject-stamp{width:75px;height:75px}.subject-stamp svg{width:21px}.subject-stamp span{font-size:6px}.subject-page-head h1{font-size:30px}.lesson-layout{display:block}.lesson-aside{display:none}.compare-grid,.example-grid,.media-grid{grid-template-columns:1fr}.diagram-flow{justify-content:flex-start}.diagram-node{font-size:8px;padding:8px}.editor-fields,.media-inputs{grid-template-columns:1fr}.main-footer{padding:15px 20px;gap:10px;font-size:7px}.main-footer span:last-child{display:none}.login-panel{padding:32px 25px 25px}.login-panel h1{font-size:34px}.login-caption{font-size:7px}.row-duration{display:none}}@media(max-width:420px){.welcome-orb{display:none}.welcome-row h1{font-size:37px}.stats-grid{grid-template-columns:1fr 1fr}.stat-card:last-child{grid-column:span 2}.toolbar-row{align-items:stretch;flex-direction:column}.search-box{width:100%}.subject-lesson-row{gap:10px;padding:15px 5px}.row-index{width:25px;font-size:15px}.row-main b{font-size:10px}.lesson-meta{gap:10px;flex-wrap:wrap}.lesson-actions{flex-wrap:wrap}.lesson-actions button{flex:1;justify-content:center}.top-actions .secure-pill{display:none}}@media print{body{background:#fff;color:#111}.sidebar,.topbar,.main-footer,.lesson-actions,.lesson-aside,.back-link{display:none!important}.main-area{margin:0;width:100%}.content-wrap{padding:0;max-width:none}.lesson-hero h1,.content-section h2{color:#111}.lead,.intro-card p,.definition-card p,.compare-grid p,.timeline-item p,.formula-card p,.example-grid p,.clean-list li,.board-card p,.homework-card p,.question-item summary{color:#222}.lesson-layout{display:block}.intro-card,.definition-card,.formula-card,.diagram-card,.board-card,.homework-card,.compare-grid>div,.example-grid>div{background:#fff;border-color:#bbb;break-inside:avoid}.video-frame{display:none}.section-kicker{color:#555}.lesson-hero{border-color:#aaa}}.rich-article-body{font-size:12px;line-height:1.85;color:#c4d1c9}.rich-article-body h2,.rich-article-body h3{color:#e9f2ec;margin:22px 0 9px}.rich-article-body p{margin:9px 0}.rich-article-body blockquote{border-left:2px solid var(--gold);padding-left:14px;color:#c8bb9a}.rich-article-body img{max-width:100%;height:auto;border-radius:10px;border:1px solid var(--line)}.rich-article-body a{color:var(--blue);text-decoration:underline}.rich-article-body ul,.rich-article-body ol{padding-left:22px}.audio-frame{padding:25px 15px;background:#83d6ad0d;display:grid;place-items:center}.audio-frame audio{width:100%;max-width:450px}.image-frame{max-height:240px;overflow:hidden;background:#050808;display:grid;place-items:center}.image-frame img{max-width:100%;max-height:240px;object-fit:contain}.login-panel{width:min(440px,100%);padding:0;border:0;border-radius:0;background:transparent;-webkit-backdrop-filter:none;backdrop-filter:none;box-shadow:none}.password-wrap{height:58px;margin-top:0;border-radius:12px;padding-left:17px;background:#0f1813b8;border-color:#83d6ad40}.password-wrap input{font-size:14px}.password-wrap button{width:42px;height:42px;border-radius:9px}.login-error{text-align:center;margin-top:14px}