:root{color-scheme:dark;--bg:#071016;--panel:#0c1922;--panel2:#10212a;--panel3:#142730;--border:#1d343b;--text:#edf6f4;--muted:#90a8b0;--dim:#658089;--lime:#b9f96a;--aqua:#64e6d5;--amber:#f9cd7c;--red:#ff7986;--shadow:0 20px 75px #0006;--radius:19px}
*{box-sizing:border-box}html,body,#app{margin:0;min-height:100vh}html{scroll-behavior:smooth}body{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text);background:var(--bg);font-size:14px;-webkit-font-smoothing:antialiased}button,input,textarea,select{font:inherit}button,a{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}a{text-decoration:none;color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--aqua);outline-offset:3px}::selection{background:#b9f96950} ::-webkit-scrollbar{width:9px;height:9px}::-webkit-scrollbar-thumb{background:#26414b;border:2px solid #081319;border-radius:20px}::-webkit-scrollbar-track{background:transparent}
.boot-loading{height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--muted)}.boot-logo{font-size:40px;color:var(--lime);font-family:monospace}
.layout{min-height:100vh;display:grid;grid-template-columns:244px minmax(0,1fr)}.sidebar{height:100vh;position:sticky;top:0;background:#0a151c;border-right:1px solid var(--border);display:flex;flex-direction:column;padding:26px 15px 18px;z-index:10}.brand{display:flex;align-items:center;gap:12px;padding:2px 12px 26px}.brand-symbol{display:grid;place-items:center;flex:none;width:37px;height:37px;background:var(--lime);border-radius:12px;color:#0b1c19;font-size:18px;font-weight:900;font-family:monospace}.brand-text strong{display:block;letter-spacing:.07em;font-size:14px}.brand-text small{color:var(--muted);font-size:10px;letter-spacing:.23em;display:block;margin-top:3px}.nav-label{font-size:10px;font-weight:800;color:var(--dim);text-transform:uppercase;letter-spacing:.17em;margin:16px 15px 10px}.nav-item{display:flex;align-items:center;gap:13px;padding:12px 14px;border-radius:11px;color:#a5b7bf;font-weight:600;margin:2px 0;transition:.2s}.nav-item:hover{color:var(--text);background:#152630}.nav-item.active{color:var(--lime);background:#b9f96a11;box-shadow:inset 0 0 0 1px #b9f96a20}.nav-icon{font-size:19px;width:20px;line-height:1;text-align:center;font-family:monospace}.sidebar-bottom{margin-top:auto;padding:14px 8px 0;border-top:1px solid var(--border)}.side-tip{padding:14px;background:linear-gradient(125deg,#203b30,#10282c);border:1px solid #37544a;border-radius:14px}.side-tip small{color:var(--lime);text-transform:uppercase;letter-spacing:.12em;font-weight:800}.side-tip p{line-height:1.5;color:#c5d7d0;font-size:12px;margin:8px 0 0}.side-user{display:flex;align-items:center;gap:10px;margin-top:16px;padding:7px 4px}.avatar{width:36px;height:36px;border-radius:11px;background:#27424b;color:var(--lime);display:grid;place-items:center;font-size:14px;font-weight:800;flex:none}.side-user b{display:block;font-size:12px;max-width:130px;white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.side-user small{color:var(--dim)}.main{min-width:0}.topbar{height:73px;display:flex;align-items:center;gap:20px;border-bottom:1px solid var(--border);padding:0 35px;position:sticky;top:0;z-index:8;background:#071016eb;backdrop-filter:blur(18px)}.breadcrumbs{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.breadcrumbs strong{color:var(--text)}.topspacer{flex:1}.search-small{border:1px solid var(--border);color:#899fa7;background:#0c1a20;border-radius:10px;padding:9px 13px;display:flex;align-items:center;gap:16px;font-size:12px;min-width:200px}.search-small kbd{border:1px solid #34474d;background:#1a2b32;border-radius:4px;padding:3px 6px;color:#b8c4c7;font-size:10px}.top-xp{padding:9px 13px;border-radius:10px;background:#b9f96a12;color:var(--lime);font-weight:800;white-space:nowrap}.top-user{width:32px;height:32px;display:grid;place-items:center;border-radius:10px;background:var(--panel3);color:var(--aqua);font-weight:800}.content{max-width:1520px;margin:auto;padding:31px 35px 85px}.eyebrow{font-size:11px;font-weight:850;letter-spacing:.19em;color:var(--lime);text-transform:uppercase}.title-xl{font-weight:800;letter-spacing:-.055em;font-size:clamp(30px,3.2vw,47px);line-height:1.12;margin:8px 0 11px}.subline{color:var(--muted);line-height:1.65;font-size:14px;max-width:700px}.muted{color:var(--muted)}.dim{color:var(--dim)}.btn{border:1px solid var(--border);background:#142630;color:var(--text);padding:11px 16px;border-radius:11px;font-weight:750;display:inline-flex;align-items:center;gap:9px;justify-content:center;transition:background .2s,transform .2s,box-shadow .2s;white-space:nowrap}.btn:hover{background:#1d343d;transform:translateY(-1px)}.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}.btn.primary{background:var(--lime);color:#0c1e16;border-color:var(--lime)}.btn.primary:hover{background:#d3ff9c;box-shadow:0 8px 25px #b9f96a24}.btn.ghost{background:transparent}.btn.danger{background:#381b28;color:#ff9baa;border-color:#683541}.btn.sm{padding:7px 10px;font-size:12px;border-radius:8px}.btn-wide{width:100%}.btn-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.section-head{display:flex;justify-content:space-between;gap:20px;align-items:center;margin:32px 0 17px}.section-head h2{font-size:20px;letter-spacing:-.035em;margin:0}.section-head a{color:var(--lime);font-weight:750;font-size:12px}.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius)}.card-inner{padding:23px}.hero{position:relative;min-height:275px;overflow:hidden;background:linear-gradient(115deg,#172e31 0,#0d2028 49%,#0a161d 100%);border:1px solid #2a4a46;border-radius:23px;padding:36px 39px;display:flex;align-items:center;justify-content:space-between}.hero:before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at 85% 30%,#b9f96a16,transparent 42%),repeating-linear-gradient(0deg,transparent,transparent 28px,#65e6d506 29px,#65e6d506 30px),repeating-linear-gradient(90deg,transparent,transparent 28px,#65e6d506 29px,#65e6d506 30px);pointer-events:none}.hero-content{z-index:1;max-width:620px}.hero h1{font-size:clamp(29px,3.4vw,46px);line-height:1.14;letter-spacing:-.055em;margin:14px 0 14px}.hero h1 em{font-style:normal;color:var(--lime)}.hero p{color:#b0ccc9;line-height:1.6;max-width:465px;margin:0 0 22px}.hero-graphic{width:330px;height:196px;flex:none;position:relative;z-index:1;background:#061319;border:1px solid #47645a;border-radius:14px;overflow:hidden;box-shadow:0 23px 60px #0009;transform:rotate(2deg)}.hero-graphic .terminal-title{background:#182e34;border-bottom:1px solid #31514d;padding:11px 14px;color:#829fa4;font-size:11px;display:flex;align-items:center;gap:7px}.dots{display:inline-flex;gap:5px;margin-right:8px}.dots i{width:7px;height:7px;border-radius:100%;background:#ff7a7a}.dots i:nth-child(2){background:#e5ca77}.dots i:nth-child(3){background:#9acc85}.hero-graphic pre{font-size:12px;line-height:1.8;padding:15px 17px;color:#c0d5cf;margin:0}.hero-graphic b{color:var(--lime)}.hero-graphic .cyan{color:var(--aqua)}.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:18px}.stat{padding:20px 22px;background:var(--panel);border:1px solid var(--border);border-radius:15px}.stat strong{display:block;font-size:26px;letter-spacing:-.045em}.stat .stat-label{font-size:12px;color:var(--muted);margin-top:4px;display:block}.stat .stat-icon{color:var(--lime);float:right;font-size:20px}.progressbar{height:6px;border-radius:10px;background:#284048;overflow:hidden}.progressbar i{display:block;height:100%;border-radius:10px;background:linear-gradient(90deg,#75d9c0,var(--lime))}.track-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.track-card{position:relative;min-height:222px;display:flex;flex-direction:column;background:#0c1a22;border:1px solid var(--border);border-radius:17px;padding:23px;transition:.2s;text-align:left}.track-card:hover{border-color:#48725a;transform:translateY(-3px);background:#10252b}.track-head{display:flex;align-items:center;justify-content:space-between}.track-number{font-size:12px;color:var(--dim);font-weight:850;letter-spacing:.12em}.track-glyph{height:36px;width:36px;border-radius:11px;background:#b9f96a10;color:var(--lime);display:grid;place-items:center;font-size:20px;font-family:monospace}.track-card h3{font-size:18px;letter-spacing:-.035em;margin:17px 0 8px}.track-card p{font-size:12px;line-height:1.55;color:var(--muted);margin:0 0 17px;min-height:55px}.track-bottom{margin-top:auto}.track-bottom small{display:flex;justify-content:space-between;margin-bottom:10px;color:var(--muted);font-size:11px}.track-bottom strong{color:var(--lime)}.track-card .level{font-size:10px;background:#243b43;border-radius:6px;padding:4px 7px;color:#bdd2d3}.activity-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(290px,1fr);gap:16px}.path-list{display:flex;flex-direction:column;gap:10px}.path-row{display:flex;align-items:center;padding:14px;background:#0f222b;border:1px solid var(--border);border-radius:13px;gap:15px}.path-row .count{font-family:monospace;color:var(--aqua);border:1px solid #2a4d53;padding:8px;border-radius:9px}.path-row b{display:block;margin-bottom:5px}.path-row p{font-size:12px;color:var(--muted);margin:0}.path-row .right{margin-left:auto;white-space:nowrap;color:var(--lime);font-size:12px;font-weight:800}.learning-split{display:grid;grid-template-columns:292px minmax(0,1fr);gap:20px;align-items:start;margin-top:22px}.lesson-sidebar{position:sticky;top:92px;background:var(--panel);border:1px solid var(--border);border-radius:16px;max-height:calc(100vh - 115px);overflow:auto;padding:15px}.lesson-sidebar .back{color:var(--aqua);font-size:12px;display:inline-flex;padding:8px}.lesson-sidebar h3{font-size:15px;margin:9px 10px 18px}.lesson-item{display:flex;align-items:start;gap:10px;padding:11px 10px;border-radius:9px;cursor:pointer;color:#a1b8be;font-size:12px;line-height:1.4}.lesson-item:hover{background:#1b323a;color:white}.lesson-item.active{background:#b9f96a13;color:var(--lime)}.lesson-item.complete .lesson-marker{background:#b9f96a25;color:var(--lime)}.lesson-marker{border-radius:7px;background:#172e36;padding:5px 7px;min-width:30px;text-align:center;flex:none;font-family:monospace}.lesson-doc{max-width:930px;min-width:0}.lesson-info{display:flex;align-items:center;gap:11px;color:var(--muted);font-size:12px;flex-wrap:wrap}.chip{display:inline-block;border:1px solid #345549;color:var(--lime);padding:6px 9px;background:#b9f96a0c;border-radius:7px;font-weight:800;font-size:10px;letter-spacing:.06em}.chip.cyan{color:var(--aqua);border-color:#32656b;background:#64e6d510}.lesson-doc h1{font-size:clamp(31px,3.7vw,48px);letter-spacing:-.058em;margin:16px 0 12px;line-height:1.11}.lesson-objectives{background:linear-gradient(120deg,#143034,#10252e);border:1px solid #2a4847;border-radius:15px;padding:20px;margin:25px 0}.lesson-objectives h3{margin:0 0 11px;color:var(--lime);font-size:13px;text-transform:uppercase;letter-spacing:.1em}.lesson-objectives ul{padding:0;margin:0;list-style:none}.lesson-objectives li{padding:5px 0;color:#d5e4df;font-size:13px}.lesson-objectives li:before{content:'✓';color:var(--lime);margin-right:10px}.lesson-section{margin:34px 0}.lesson-section h2{font-size:19px;letter-spacing:-.02em;margin-bottom:11px}.lesson-section p{color:#b6cbd0;line-height:1.85;font-size:14px;margin:0;max-width:830px}.code-card{background:#071218;border:1px solid #274149;border-radius:13px;overflow:hidden;margin-top:16px}.code-head{display:flex;align-items:center;justify-content:space-between;background:#10232c;border-bottom:1px solid #213943;padding:11px 15px;color:#92b0b6;font-size:11px;font-weight:700}.code-card pre{overflow:auto;padding:20px;line-height:1.8;font:12px/1.7 "SFMono-Regular",Consolas,"Liberation Mono",monospace;margin:0;color:#b9f96a;white-space:pre}.quiz-panel{background:#11242c;border:1px solid #305052;border-radius:17px;padding:25px;margin:26px 0}.quiz-panel h3{margin:9px 0 16px;font-size:19px}.quiz-options{display:grid;gap:9px;margin:0 0 18px}.quiz-option{border:1px solid #2b444d;background:#0b1b23;border-radius:10px;padding:13px;display:flex;align-items:center;gap:10px;cursor:pointer}.quiz-option:hover{border-color:#6d9586}.quiz-option.selected{border-color:var(--lime);background:#b9f96a0c}.quiz-option input{accent-color:var(--lime)}.lab-challenge{border:1px solid #42644b;background:linear-gradient(140deg,#1c3329,#10282a);border-radius:18px;padding:24px;margin:26px 0}.lab-challenge h3{margin:10px 0 8px;font-size:20px}.lab-challenge p{line-height:1.65;color:#c8d8cc}.feedback{margin-top:13px;padding:13px 16px;border:1px solid #406064;border-radius:10px;color:#d1e3e0;background:#18313a;font-size:12px;line-height:1.6}.feedback.success{border-color:#608c43;background:#273d29;color:#c5f9a0}.feedback.error{border-color:#785452;background:#362a2b;color:#ffc2b6}.lesson-footer{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;padding-top:28px;border-top:1px solid var(--border);margin-top:30px}.topic-header{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:20px 0}.topic-summary{background:var(--panel);border:1px solid var(--border);border-radius:18px;padding:23px 26px;margin-top:20px}.topic-summary .topic-meta{display:flex;gap:11px;flex-wrap:wrap}.catalog-tools{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:24px 0}.search-input{background:#101f27;border:1px solid #2d424c;border-radius:11px;outline:none;color:var(--text);padding:12px 15px;min-width:280px;flex:1}.search-input:focus{border-color:var(--aqua)}.select{background:#101f27;border:1px solid #2d424c;border-radius:11px;outline:none;color:var(--text);padding:12px 15px}.lesson-list{display:grid;gap:9px}.list-lesson{display:flex;align-items:center;gap:16px;background:#0e1f27;border:1px solid var(--border);border-radius:12px;padding:16px 18px;text-align:left}.list-lesson:hover{border-color:#457c6f;background:#132931}.list-lesson .step{font-family:monospace;color:var(--lime);font-size:13px;width:37px;flex:none}.list-lesson .name{font-weight:750;flex:1}.list-lesson .lesson-type{font-size:11px;color:var(--muted)}.list-lesson .check{color:var(--lime)}.lab-intro{background:linear-gradient(120deg,#112b2d,#0e1c25);padding:25px;border:1px solid #2f4c48;border-radius:18px}.lab-intro h3{font-size:24px;margin:9px 0}.lab-intro p{color:var(--muted);line-height:1.8;max-width:620px}.pill{font-size:11px;color:var(--aqua);border:1px solid #2b5b5c;padding:7px 10px;border-radius:8px}.two-col{display:grid;grid-template-columns:1.2fr .8fr;gap:15px}.field{display:grid;gap:7px}.field label{color:#b4cbd0;font-size:12px;font-weight:750}.field input,.field textarea,.field select{background:#0b1b23;border:1px solid #2c4951;color:var(--text);padding:12px;border-radius:10px;outline:none;width:100%}.field input:focus,.field textarea:focus{border-color:var(--lime)}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.form-grid .full{grid-column:1/-1}.notes{width:100%;min-height:160px;resize:vertical;background:#0c1e26;color:var(--text);border:1px solid #29454d;border-radius:12px;padding:15px;line-height:1.6}.empty-state{text-align:center;padding:55px 24px;color:var(--muted);border:1px dashed #29434a;border-radius:16px;background:#0b1a21}.empty-state strong{display:block;color:var(--text);font-size:18px;margin-bottom:7px}.achievement-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:21px}.achievement{padding:23px;min-height:150px}.achievement .badgeicon{font-size:29px;display:block;margin-bottom:12px}.achievement h3{margin:0 0 6px}.achievement p{color:var(--muted);font-size:12px}.achievement.locked{opacity:.48}.table-wrap{overflow:auto;border:1px solid var(--border);border-radius:14px}table{border-collapse:collapse;width:100%;min-width:540px}th,td{text-align:left;padding:14px;border-bottom:1px solid var(--border);font-size:12px}th{background:#182931;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-size:10px}tr:last-child td{border-bottom:none}.mono{font-family:ui-monospace,monospace}.auth-screen{min-height:100vh;display:grid;grid-template-columns:1fr 470px;background:radial-gradient(ellipse at 33% 34%,#1b3b35 0,transparent 44%),#071016}.auth-left{display:flex;flex-direction:column;justify-content:space-between;padding:54px 8vw}.auth-left .brand{padding:0}.auth-claim h1{font-size:clamp(44px,5vw,79px);line-height:1.02;letter-spacing:-.075em;margin:0 0 24px}.auth-claim h1 span{color:var(--lime)}.auth-claim p{font-size:16px;color:#a8c6c0;line-height:1.75;max-width:470px}.auth-snippet{display:inline-flex;align-items:center;gap:10px;padding:12px 17px;border:1px solid #315b4d;border-radius:10px;background:#b9f96a0b;font-family:monospace;color:var(--lime);font-size:13px}.auth-left-footer{color:var(--dim);font-size:12px}.auth-side{background:#0b1921;border-left:1px solid #244047;display:flex;align-items:center;justify-content:center;padding:35px}.auth-form{width:100%;max-width:370px}.auth-form h2{font-size:31px;letter-spacing:-.05em;margin:12px 0 9px}.auth-form p{color:var(--muted);line-height:1.6;margin:0 0 24px}.auth-form form{display:grid;gap:16px}.auth-toggle{margin-top:24px;text-align:center;color:var(--muted);font-size:12px}.auth-toggle a{color:var(--lime);font-weight:800}.auth-error{color:#ffc1c1;background:#ff798615;border:1px solid #7b3e44;border-radius:8px;padding:12px;line-height:1.5}.hidden{display:none!important}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);z-index:60;background:#183138;border:1px solid #48665b;box-shadow:var(--shadow);color:var(--text);border-radius:11px;padding:14px 20px;font-weight:700;font-size:12px;max-width:92vw}.terminal-drawer{position:fixed;bottom:22px;right:23px;width:min(770px,calc(100vw - 36px));height:min(510px,75vh);background:#061116;border:1px solid #48624c;border-radius:18px;box-shadow:0 25px 100px #000d;z-index:30;display:flex;flex-direction:column;overflow:hidden;transition:.2s}.terminal-drawer.maximized{inset:0;width:100vw;height:100vh;border-radius:0}.terminal-drawer.closed{display:none}.terminal-bar{padding:13px 16px;display:flex;align-items:center;gap:10px;background:#132930;border-bottom:1px solid #31504f}.terminal-bar strong{font-size:12px;letter-spacing:.02em}.terminal-bar .bar-actions{margin-left:auto;display:flex;gap:7px}.terminal-bar button{border:1px solid #344a50;background:#1a353c;color:#c8e1db;border-radius:7px;padding:5px 9px}.terminal-screen{flex:1;min-height:0;padding:9px 13px;overflow:hidden}.terminal-screen .xterm{height:100%}.terminal-foot{border-top:1px solid #234046;display:flex;justify-content:space-between;gap:10px;padding:8px 14px;color:#81a199;font-size:11px;background:#0f2529}.online{color:var(--lime)}.offline{color:var(--red)}.quick-lab{position:fixed;right:23px;bottom:20px;z-index:20;border-radius:14px;background:var(--lime);color:#0c211c;border:1px solid #cee99b;box-shadow:0 8px 35px #b9f96a29;padding:15px 20px;font-weight:850}.mobile-menu{display:none}.admin-panel{padding:22px;margin-top:20px}.admin-panel h3{margin:0 0 16px}.search-result{padding:15px;display:flex;align-items:center;gap:13px;border-bottom:1px solid var(--border)}.search-result:last-child{border-bottom:0}.search-result b{display:block;margin-bottom:5px}.search-result small{color:var(--muted)}.search-result .end{margin-left:auto;color:var(--lime)}.loader{display:inline-block;width:16px;height:16px;border:2px solid #b9f96a44;border-top-color:var(--lime);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}
@media(min-width:1550px){.content{padding:37px 52px 100px}.topbar{padding:0 52px}.hero{min-height:310px}}
@media(max-width:1180px){.layout{grid-template-columns:210px minmax(0,1fr)}.sidebar{padding-left:9px;padding-right:9px}.content{padding:25px 25px 70px}.topbar{padding:0 25px}.track-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero-graphic{width:250px;transform:rotate(0)}}
@media(max-width:830px){.layout{grid-template-columns:1fr}.sidebar{position:fixed;transform:translateX(-110%);width:255px;box-shadow:0 30px 70px #000b;transition:transform .2s}.sidebar.open{transform:translateX(0)}.mobile-menu{display:inline-flex;border:1px solid var(--border);border-radius:10px;background:#15262f;color:var(--lime);padding:8px 11px;font-size:19px}.topbar{height:65px}.search-small{min-width:auto}.search-small kbd{display:none}.stats{grid-template-columns:repeat(2,minmax(0,1fr))}.hero-graphic{display:none}.learning-split{grid-template-columns:1fr}.lesson-sidebar{position:static;max-height:250px}.auth-screen{grid-template-columns:1fr}.auth-left{padding:25px 35px}.auth-left .auth-claim,.auth-left-footer{display:none}.auth-side{padding:30px;border-left:0;background:transparent}.auth-form{max-width:440px}.achievement-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:550px){.content{padding:22px 16px 90px}.topbar{padding:0 15px;gap:10px}.topbar .search-small{display:none}.hero{padding:25px;min-height:280px}.hero h1{font-size:32px}.hero p{font-size:13px}.stats{gap:10px}.stat{padding:16px}.stat strong{font-size:23px}.track-grid,.activity-grid,.two-col,.achievement-grid{grid-template-columns:1fr}.track-card{min-height:190px}.section-head h2{font-size:18px}.lesson-doc h1{font-size:31px}.lesson-section p{font-size:13px}.form-grid{grid-template-columns:1fr}.form-grid .full{grid-column:auto}.terminal-drawer{bottom:0;right:0;width:100vw;height:76vh;border-radius:16px 16px 0 0}.quick-lab{right:12px;bottom:12px;padding:12px 14px}.auth-left{padding:26px 25px 0}.auth-side{padding:30px 25px}.auth-form h2{font-size:27px}}

/* CPT1625 course materials */
.course-materials{margin:26px 0;background:linear-gradient(145deg,#142730,#0a1b22);border:1px solid #39605a;border-radius:16px;padding:22px}
.course-materials h2{margin:10px 0;font-size:22px;letter-spacing:-.025em}.course-materials p{color:var(--muted);font-size:13px;line-height:1.65}
.resource-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(245px,1fr));gap:9px;margin-top:15px}
.resource-item{display:flex;gap:10px;align-items:center;border:1px solid #31544c;background:#0b2028;border-radius:11px;padding:13px;color:var(--text)}
.resource-item:hover{border-color:var(--lime);background:#142f2d}.resource-item span:nth-child(2){flex:1;min-width:0}.resource-item b{display:block;overflow-wrap:anywhere;font-size:12px}.resource-item small{display:block;color:var(--muted);margin-top:5px;font-size:11px}
.resource-item .resource-icon{font-size:22px;color:var(--lime)}.resource-item strong{color:var(--lime);font-size:18px}.course-note{border-left:3px solid var(--aqua);background:#183137;color:#b6d7d2;padding:13px;margin:18px 0;border-radius:0 9px 9px 0;font-size:12px;line-height:1.6}
.readable-body p{white-space:pre-wrap;overflow-wrap:anywhere}.lesson-section .readable-body p{margin:0 0 12px}

.course-milestones{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin:25px 0}
.course-milestones>div{background:#10252c;border:1px solid #31534c;border-radius:14px;padding:22px}
.course-milestones h3{font-size:17px;margin:12px 0 8px}.course-milestones p{color:var(--muted);font-size:12px;line-height:1.65}
@media(max-width:650px){.course-milestones{grid-template-columns:1fr}}

/* Rhodium Lange — course reader and integrated Ubuntu KDE desktop */
.material-open { text-align:left; cursor:pointer; width:100%; color:inherit; font:inherit; }
.material-open:hover { border-color: var(--lime); background: rgba(174,255,122,.06); }
.material-reader { margin:22px 0; background:#0a151b; border:1px solid #28434c; border-radius:15px; overflow:hidden; }
.reader-toolbar { position:sticky; top:0; z-index:2; background:#0d2028; display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:12px; padding:13px 16px; border-bottom:1px solid #28434c; }
.reader-toolbar strong { display:block; overflow-wrap:anywhere; font-size:13px; }
.reader-toolbar small { display:block; margin-top:3px; color:#95adb5; font-size:11px; }
.reader-controls { display:flex;align-items:center;gap:8px; font-size:12px; }
.reader-page { padding:14px; max-height:72vh; overflow:auto; display:flex;justify-content:center;align-items:flex-start; background:#14232b;cursor:pointer; }
.reader-page img {display:block;max-width:100%;height:auto;box-shadow:0 6px 35px rgba(0,0,0,.45);background:#fff; user-select:none; }
.reader-hint {padding:0 16px 13px;color:#8da5b1;font-size:12px;}
/* Resizable workspace: the app and Webtop occupy separate, non-overlapping regions. */
:root{--desktop-width:52vw}
.desktop-dock{position:fixed;inset:0 0 0 auto;width:var(--desktop-width);background:#061118;display:flex;flex-direction:column;z-index:40;border-left:1px solid #3c5c67;box-shadow:none;transform:none;min-width:0}
.desktop-dock.closed{display:none;pointer-events:none}
.desktop-resizer{position:absolute;top:0;bottom:0;left:-6px;width:12px;z-index:3;cursor:col-resize;touch-action:none;background:transparent}
.desktop-resizer:hover,.desktop-resizer:focus-visible,.desktop-resizer.dragging{outline:none;background:rgba(185,249,106,.38)}
.desktop-resizer:focus-visible{box-shadow:0 0 0 2px var(--lime)}
.desktop-top{display:flex;align-items:center;justify-content:space-between;min-height:49px;background:#102730;color:#d8f4e4;padding:0 13px;gap:8px;font-size:12px;font-weight:700;letter-spacing:.04em}
.desktop-title{display:flex;align-items:center;gap:7px;min-width:0;white-space:nowrap}
.desktop-title small{font-size:9px;opacity:.65;letter-spacing:.06em}
.desktop-live{color:#b4fb83;font-size:11px}
.desktop-controls{display:flex;gap:5px;align-items:center;flex-wrap:nowrap}
.desktop-controls button{padding:7px 9px;color:#ecf5f5;border:1px solid #37515a;border-radius:6px;background:#19323b;cursor:pointer;white-space:nowrap;font-size:11px}
.desktop-controls button:hover,.desktop-controls button:focus-visible{border-color:var(--lime)}
.desktop-frame-box{position:relative;flex:1;min-height:0;overflow:hidden}
.webtop-iframe{display:block;width:100%;height:100%;border:0;background:#17212a}
.desktop-loading{position:absolute;inset:0;display:grid;place-content:center;color:#bddbd8;text-align:center;background:#0b1c24;padding:20px}
.desktop-foot{padding:8px 11px;color:#9fb7bc;background:#11242c;border-top:1px solid #2b4b52;font-size:10px;text-align:center}
/* The original grid sidebar occupied a column even when hidden: remove the column too. */
body.has-desktop #app{width:calc(100vw - var(--desktop-width));min-width:0}
body.has-desktop .layout{display:grid;grid-template-columns:minmax(0,1fr);width:100%;min-width:0}
body.has-desktop .sidebar{display:none}
body.has-desktop .main{margin:0!important;width:100%;min-width:0;max-width:100%;overflow:clip}
body.has-desktop .content{padding:22px 25px 80px;min-width:0;max-width:100%}
body.has-desktop .topbar{padding:0 25px;min-width:0;gap:10px}
body.has-desktop .breadcrumbs{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
body.has-desktop .topbar .search-small{display:none}
body.has-desktop .learning-split{display:block;min-width:0;width:100%}
body.has-desktop .lesson-sidebar{display:none}
body.has-desktop .lesson-doc{max-width:100%;min-width:0;width:100%}
body.has-desktop .lesson-doc h1{font-size:clamp(25px,2.5vw,36px);overflow-wrap:anywhere;hyphens:auto;line-height:1.18}
body.has-desktop .lesson-info{display:flex;flex-wrap:wrap;gap:8px}
body.has-desktop .lesson-info span{white-space:nowrap}
body.has-desktop .resource-grid{grid-template-columns:minmax(0,1fr)}
body.has-desktop .reader-toolbar{position:relative}
body.has-desktop .reader-page{max-height:65vh}
body.has-desktop .course-materials,body.has-desktop .lesson-objectives,body.has-desktop .lab-challenge{padding:18px}
body.has-desktop .stats{grid-template-columns:repeat(2,minmax(0,1fr))}
body.has-desktop .track-grid,body.has-desktop .activity-grid,body.has-desktop .course-milestones{grid-template-columns:1fr}
body.has-desktop .hero-graphic{display:none}
body.has-desktop .hero{padding:25px}
/* Focus is an explicit student action, not an automatic overlay on the materials. */
body.desktop-focus .desktop-dock{width:100vw;z-index:55}
body.desktop-focus #app{width:0;overflow:hidden;visibility:hidden}
body.desktop-focus .desktop-resizer{display:none}
/* At tablet/mobile widths, switch between full lesson and full desktop instead
   of squeezing either into an unreadable column. '← Lesson' returns instantly. */
@media(max-width:1100px){
 body.has-desktop .desktop-dock{width:100vw;z-index:55}
 body.has-desktop #app{width:0;overflow:hidden;visibility:hidden}
 body.has-desktop .desktop-resizer{display:none}
 .desktop-title small{display:none}
}
@media(max-width:550px){.desktop-controls button{padding:6px 7px;font-size:10px}.desktop-title{font-size:10px}.desktop-foot{font-size:9px}}
.reader-text{margin:0 16px 16px; padding:12px; background:#0e222c;border:1px solid #2a4550;border-radius:8px;color:#ccdfdc;font-size:13px;}
.reader-text summary{cursor:pointer;font-weight:700}.reader-text pre{white-space:pre-wrap;overflow-wrap:anywhere;max-height:40vh;overflow:auto;font:inherit;line-height:1.55;}