@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--bg:#0b1020;--panel:#11182b;--panel2:#151e34;--panel3:#1a2540;--line:#26324b;--text:#eef3ff;--muted:#9ba9c4;--faint:#71809c;--accent:#8d9dff;--accent2:#b4bcff;--green:#7be0b1;--yellow:#f6cf82;--red:#ff9b9b;--shadow:0 18px 50px rgba(0,0,0,.2);--radius:18px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:'DM Sans',sans-serif;font-size:14px;line-height:1.55}button,input{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.app-shell{display:flex;min-height:100vh}.sidebar{width:270px;flex:0 0 270px;background:#0e1425;border-right:1px solid var(--line);display:flex;flex-direction:column;padding:22px 14px 16px;position:sticky;top:0;height:100vh;overflow-y:auto;z-index:30}.brand{display:flex;align-items:center;gap:11px;padding:2px 9px 27px}.brand-mark{width:39px;height:39px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(145deg,#b9c2ff,#6c7cff);color:#0b1020;font-family:Manrope;font-weight:800;font-size:14px;box-shadow:0 7px 22px #6879ff30}.brand-name{font:700 14px Manrope,sans-serif;letter-spacing:-.3px}.brand-sub{font:500 9px 'DM Mono',monospace;color:var(--muted);letter-spacing:1.25px;margin-top:2px}.icon-btn{border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:10px;width:38px;height:38px;display:grid;place-items:center;font-size:18px;transition:.2s}.icon-btn:hover{border-color:var(--accent);background:var(--panel2)}.close-sidebar{display:none;margin-left:auto}.home-link{display:flex;align-items:center;gap:11px;width:100%;border:0;background:transparent;color:var(--muted);padding:11px 13px;text-align:left;border-radius:11px;margin-bottom:5px;font-weight:600}.home-link:hover,.home-link.active{background:#202b49;color:var(--text)}.home-link.active .nav-symbol{color:var(--accent2)}.nav-symbol{font-size:18px;width:20px;text-align:center;color:var(--faint)}.nav-label{font:500 10px 'DM Mono',monospace;letter-spacing:1.4px;color:var(--faint);padding:23px 12px 10px;display:flex;justify-content:space-between}.nav-label span{color:var(--muted)}.stage-nav{display:flex;flex-direction:column;gap:4px}.stage-group{margin-bottom:6px}.stage-heading{width:100%;border:0;background:transparent;color:var(--muted);padding:9px 11px;display:flex;align-items:center;gap:9px;text-align:left;border-radius:10px;font-weight:700;font-size:12px}.stage-heading:hover{background:var(--panel)}.stage-number{width:23px;height:23px;border:1px solid var(--line);border-radius:7px;display:grid;place-items:center;font:11px 'DM Mono',monospace;color:var(--accent2);flex-shrink:0}.stage-heading .stage-chevron{margin-left:auto;color:var(--faint);transition:transform .2s}.stage-group.open .stage-chevron{transform:rotate(90deg)}.module-links{display:none;padding:2px 0 5px 15px}.stage-group.open .module-links{display:block}.module-link{width:100%;border:0;background:transparent;color:var(--faint);text-align:left;display:flex;gap:9px;align-items:center;padding:8px 9px 8px 12px;border-radius:8px;font-size:12px;line-height:1.35}.module-link:hover{background:#171f34;color:var(--text)}.module-link.selected{background:#202b49;color:var(--text)}.module-link .num{font:10px 'DM Mono',monospace;color:var(--faint);min-width:18px}.module-link.selected .num{color:var(--accent2)}.done-dot{width:7px;height:7px;border:1px solid #50607d;border-radius:50%;margin-left:auto;flex-shrink:0}.module-link.completed .done-dot{background:var(--green);border-color:var(--green)}.sidebar-bottom{margin-top:auto;padding-top:22px}.mini-progress{background:#131c30;border:1px solid var(--line);border-radius:13px;padding:13px;margin:8px 3px 14px}.mini-progress-top{display:flex;justify-content:space-between;font-size:12px;margin-bottom:10px}.mini-progress-top b{color:var(--green);font:500 12px 'DM Mono',monospace}.progress-track{height:5px;background:#28334c;border-radius:8px;overflow:hidden}.progress-track span{display:block;width:0;height:100%;background:linear-gradient(90deg,#7be0b1,#a6edca);border-radius:8px;transition:width .3s}.small{font-size:11px}.muted{color:var(--muted)}.mini-progress .muted{margin-top:8px}.main-area{min-width:0;flex:1;display:flex;flex-direction:column}.topbar{height:70px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 34px;position:sticky;top:0;background:rgba(11,16,32,.92);backdrop-filter:blur(18px);z-index:20}.breadcrumbs{display:flex;align-items:center;gap:10px;color:var(--faint);font-size:12px}.breadcrumbs b{color:var(--text);font-weight:600}.crumb-sep{color:#46516b}.top-actions{display:flex;align-items:center;gap:10px}.searchbox{height:38px;width:225px;display:flex;align-items:center;gap:9px;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:0 10px;color:var(--muted)}.searchbox>span{font-size:21px}.searchbox input{min-width:0;width:100%;border:0;outline:0;background:transparent;color:var(--text);font-size:12px}.searchbox input::placeholder{color:var(--faint)}kbd{font:10px 'DM Mono',monospace;border:1px solid var(--line);padding:2px 5px;border-radius:5px;color:var(--faint)}.menu-btn{display:none}.content{width:100%;max-width:1180px;margin:0 auto;padding:34px 36px 55px;flex:1}.footer{display:flex;justify-content:space-between;gap:14px;border-top:1px solid var(--line);padding:16px 36px;color:var(--faint);font-size:10px;letter-spacing:.2px}.footer span:first-child{font-family:'DM Mono',monospace;letter-spacing:1.2px}.eyebrow{font:500 10px 'DM Mono',monospace;letter-spacing:1.8px;text-transform:uppercase;color:var(--accent2);display:flex;align-items:center;gap:9px}.eyebrow:before{content:'';width:18px;height:1px;background:var(--accent)}h1,h2,h3,p{margin-top:0}h1,h2,h3{font-family:Manrope,sans-serif;letter-spacing:-.7px}h1{font-size:clamp(29px,4vw,45px);line-height:1.15;margin:14px 0 15px;font-weight:800;max-width:800px}h2{font-size:23px;line-height:1.25;margin-bottom:14px}h3{font-size:15px;margin-bottom:9px}.lead{font-size:15px;line-height:1.75;color:var(--muted);max-width:760px}.hero{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(230px,.75fr);gap:22px;align-items:stretch;margin-bottom:26px}.hero-main{padding:20px 0 12px}.hero-card{position:relative;overflow:hidden;border:1px solid #344166;background:radial-gradient(circle at 100% 0%,#35477d 0,transparent 48%),linear-gradient(145deg,#192442,#12192b 70%);border-radius:20px;padding:24px;display:flex;flex-direction:column;justify-content:space-between;min-height:230px}.hero-card:after{content:'WTM';font:800 82px Manrope,sans-serif;letter-spacing:-8px;position:absolute;right:-6px;bottom:20px;color:#c2cbff0b;pointer-events:none}.card-label{font:500 10px 'DM Mono',monospace;letter-spacing:1.4px;color:#b9c3ff}.hero-card h3{font-size:20px;max-width:240px;margin:13px 0}.hero-card p{font-size:12px;color:#aab7d5;max-width:260px}.primary-btn,.secondary-btn,.ghost-btn{border-radius:10px;padding:10px 14px;font-weight:700;font-size:12px;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:.2s;border:1px solid transparent}.primary-btn{background:var(--accent);color:#10152a}.primary-btn:hover{background:#b4bcff;transform:translateY(-1px)}.secondary-btn{background:var(--panel2);color:var(--text);border-color:var(--line)}.secondary-btn:hover,.ghost-btn:hover{border-color:var(--accent)}.ghost-btn{background:transparent;color:var(--muted);border-color:var(--line)}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:24px 0 34px}.stat-card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px 17px}.stat-label{font:500 10px 'DM Mono',monospace;letter-spacing:.8px;color:var(--faint);text-transform:uppercase}.stat-number{font:700 26px Manrope,sans-serif;margin:8px 0 2px}.stat-foot{font-size:11px;color:var(--muted)}.section-head{display:flex;align-items:end;justify-content:space-between;gap:12px;margin:30px 0 15px}.section-head h2{margin:0}.section-head p{color:var(--muted);font-size:12px;margin:5px 0 0}.stage-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.stage-card{background:var(--panel);border:1px solid var(--line);border-radius:15px;padding:18px;min-width:0;transition:.2s}.stage-card:hover{border-color:#596995;transform:translateY(-2px)}.stage-card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}.stage-badge{font:500 10px 'DM Mono',monospace;color:var(--accent2);background:#283253;padding:5px 7px;border-radius:6px}.stage-card h3{font-size:16px;margin:0 0 7px}.stage-card p{color:var(--muted);font-size:12px;min-height:39px;margin-bottom:16px}.stage-card-bottom{display:flex;justify-content:space-between;align-items:center;color:var(--faint);font-size:11px}.stage-card-bottom button{border:0;background:transparent;color:var(--accent2);font-weight:700;font-size:11px}.stage-card .progress-track{margin-top:13px}.continue-card{display:flex;align-items:center;gap:15px;background:var(--panel2);border:1px solid var(--line);border-radius:15px;padding:17px;margin-top:18px}.continue-icon{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:#283253;color:var(--accent2);font-size:20px;flex-shrink:0}.continue-copy{flex:1;min-width:0}.continue-copy .muted{font-size:11px}.continue-copy h3{margin:4px 0 0;font-size:14px}.continue-card .primary-btn{flex-shrink:0}.module-hero{border:1px solid var(--line);background:linear-gradient(120deg,#18213a,#11182b 75%);border-radius:19px;padding:25px 27px;margin-bottom:20px;position:relative;overflow:hidden}.module-hero:after{content:attr(data-number);position:absolute;right:24px;top:5px;font:800 100px Manrope,sans-serif;color:#d4dcff08;letter-spacing:-8px;pointer-events:none}.module-hero h1{font-size:clamp(27px,3.5vw,38px);margin:11px 0 12px;max-width:760px}.module-hero .lead{font-size:14px;max-width:790px}.meta-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:19px}.meta-pill{border:1px solid var(--line);border-radius:7px;padding:5px 9px;color:var(--muted);font-size:10px}.meta-pill strong{color:var(--text);font-weight:600}.module-layout{display:grid;grid-template-columns:minmax(0,1fr) 245px;gap:19px;align-items:start}.lesson-main{min-width:0}.lesson-side{position:sticky;top:90px;display:flex;flex-direction:column;gap:12px}.panel{background:var(--panel);border:1px solid var(--line);border-radius:15px;padding:19px;margin-bottom:14px;min-width:0}.panel-head{display:flex;align-items:center;gap:10px;margin-bottom:13px}.panel-icon{width:30px;height:30px;display:grid;place-items:center;border:1px solid var(--line);border-radius:9px;background:var(--panel2);color:var(--accent2);font-size:14px;flex-shrink:0}.panel-head h2{font-size:16px;margin:0;letter-spacing:-.3px}.panel p{color:var(--muted);font-size:13px;line-height:1.75}.concept-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.concept{padding:13px;border-radius:11px;background:var(--panel2);border:1px solid #26334e}.concept strong{display:block;color:var(--text);font-size:12px;margin-bottom:5px}.concept p{font-size:11px;margin:0;line-height:1.65}.flow-list{counter-reset:flow;display:flex;flex-direction:column;gap:9px}.flow-step{display:flex;gap:12px;align-items:flex-start;color:var(--muted);font-size:12px}.flow-step:before{counter-increment:flow;content:counter(flow,decimal-leading-zero);font:11px 'DM Mono',monospace;color:var(--accent2);background:#283253;border-radius:7px;padding:5px 6px;flex-shrink:0}.examples{display:grid;gap:10px}.example{padding:14px;border:1px solid var(--line);background:var(--panel2);border-radius:12px}.example-top{display:flex;gap:9px;align-items:center;margin-bottom:7px}.example-num{font:11px 'DM Mono',monospace;color:var(--accent2);border:1px solid #344166;border-radius:6px;padding:3px 6px}.example h3{margin:0;font-size:13px}.example p{margin:0;font-size:12px}.check-list{display:grid;gap:9px}.check-item{display:flex;gap:10px;align-items:flex-start;font-size:12px;color:var(--muted)}.check-item:before{content:'✓';display:grid;place-items:center;width:18px;height:18px;border-radius:6px;border:1px solid #3e785f;color:var(--green);font-size:11px;flex-shrink:0}.skip-item:before{content:'–';border-color:#5d5260;color:var(--yellow)}.notes-area{width:100%;min-height:220px;background:#0b1120;border:1px solid #2b3854;border-radius:11px;color:#dce4f9;padding:14px;font:12px/1.75 'DM Mono',monospace;resize:vertical}.note-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}.side-panel{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:15px}.side-panel h3{font-size:12px;margin:0 0 11px}.side-list{display:grid;gap:8px}.side-list button{border:0;background:transparent;color:var(--muted);text-align:left;font-size:11px;padding:3px 0;display:flex;gap:8px}.side-list button:hover{color:var(--accent2)}.side-list span{color:var(--faint);font:10px 'DM Mono',monospace}.quiz-option{width:100%;text-align:left;padding:11px 12px;border-radius:10px;background:var(--panel2);border:1px solid var(--line);color:var(--muted);font-size:12px;margin:5px 0}.quiz-option:hover{border-color:#596995;color:var(--text)}.quiz-option.correct{border-color:#3e785f;background:#153327;color:var(--green)}.quiz-option.wrong{border-color:#83535b;background:#351c28;color:var(--red)}.quiz-feedback{font-size:12px;margin-top:10px;color:var(--muted)}.lesson-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:19px;padding-top:17px;border-top:1px solid var(--line)}.lesson-bottom .muted{font-size:11px}.mark-btn.done{background:#173b2e;color:var(--green);border-color:#3e785f}.stage-page-head{margin-bottom:25px}.stage-module-list{display:grid;gap:10px}.module-row{display:flex;align-items:center;gap:14px;padding:15px;background:var(--panel);border:1px solid var(--line);border-radius:13px;cursor:pointer;transition:.15s}.module-row:hover{border-color:#566794;background:var(--panel2)}.module-row.done{border-color:#2c604b}.module-index{width:42px;height:42px;display:grid;place-items:center;background:var(--panel2);border:1px solid var(--line);border-radius:11px;font:12px 'DM Mono',monospace;color:var(--accent2);flex-shrink:0}.module-row-copy{flex:1;min-width:0}.module-row-copy h3{font-size:13px;margin:0 0 4px}.module-row-copy p{font-size:11px;color:var(--muted);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.module-row-meta{display:flex;align-items:center;gap:10px;color:var(--faint);font-size:10px;flex-shrink:0}.module-row-meta .check{color:var(--green);font-size:16px}.search-results{display:grid;gap:8px;margin-top:20px}.search-result{padding:15px;border:1px solid var(--line);background:var(--panel);border-radius:12px;text-align:left;color:var(--text);display:block;width:100%}.search-result:hover{border-color:var(--accent)}.search-result strong{display:block;font-size:13px;margin-bottom:4px}.search-result span{display:block;color:var(--muted);font-size:11px}.empty-state{text-align:center;padding:60px 20px;color:var(--muted)}.empty-state h2{color:var(--text)}.callout{border-left:3px solid var(--accent);padding:12px 14px;background:#1a2440;border-radius:0 10px 10px 0;color:var(--muted);font-size:12px;line-height:1.7}.callout strong{color:var(--text)}.hidden{display:none!important}.light-mode{--bg:#f3f5fb;--panel:#fff;--panel2:#f6f7fc;--panel3:#eceffd;--line:#dfe4f0;--text:#1a2440;--muted:#56627b;--faint:#8490a7;--accent:#5266e8;--accent2:#5266e8;--shadow:0 18px 50px rgba(29,43,78,.08)}.light-mode .sidebar{background:#fff}.light-mode .topbar{background:rgba(243,245,251,.93)}.light-mode .hero-card{background:radial-gradient(circle at 100% 0%,#d9e0ff 0,transparent 48%),linear-gradient(145deg,#e7ebff,#fff 70%);border-color:#d7def8}.light-mode .hero-card p{color:#56627b}.light-mode .card-label{color:#5266e8}.light-mode .hero-card:after{color:#5266e80b}.light-mode .module-hero{background:linear-gradient(120deg,#e9edff,#fff 75%)}.light-mode .notes-area{background:#f8f9fd;color:#24304d;border-color:#dfe4f0}.light-mode .callout{background:#eef1ff}.light-mode .stage-badge{background:#edf0ff}.light-mode .home-link.active,.light-mode .home-link:hover,.light-mode .module-link.selected{background:#edf0ff}.light-mode .module-link:hover{background:#f4f5fb}.light-mode .mini-progress{background:#f6f7fc}.light-mode .progress-track{background:#e3e7f2}.light-mode .continue-icon,.light-mode .stage-number{background:#edf0ff}.light-mode .concept{border-color:#e4e7f0}.light-mode .example{background:#f8f9fd}.light-mode .quiz-option{background:#f8f9fd}.light-mode .quiz-option.correct{background:#e9f8ef}.light-mode .quiz-option.wrong{background:#fff0f0}.mobile-scrim{display:none}
@media(max-width:1100px){.sidebar{width:245px;flex-basis:245px}.content{padding:27px 25px 45px}.topbar{padding:0 25px}.module-layout{grid-template-columns:minmax(0,1fr) 210px;gap:13px}.panel{padding:16px}.hero{grid-template-columns:minmax(0,1.25fr) minmax(220px,.8fr)}}
@media(max-width:850px){.sidebar{position:fixed;left:0;top:0;bottom:0;height:100dvh;transform:translateX(-105%);transition:transform .25s ease;width:285px;max-width:85vw;box-shadow:var(--shadow)}.sidebar.open{transform:translateX(0)}.close-sidebar{display:grid}.mobile-scrim.show{display:block;position:fixed;inset:0;background:#030712aa;z-index:25}.menu-btn{display:grid}.topbar{gap:12px;padding:0 18px}.breadcrumbs{flex:1;overflow:hidden;white-space:nowrap}.searchbox{width:190px}.content{padding:25px 20px 40px}.module-layout{grid-template-columns:1fr}.lesson-side{position:static;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));align-items:start}.hero{grid-template-columns:1fr 250px}.footer{padding:15px 20px}}
@media(max-width:600px){.topbar{height:62px;padding:0 13px;gap:9px}.breadcrumbs{font-size:11px;gap:6px}.breadcrumbs>span:first-child{display:none}.searchbox{width:38px;padding:0;justify-content:center;border:0;background:transparent}.searchbox input,.searchbox kbd{display:none}.searchbox>span{font-size:23px}.searchbox.expanded{position:absolute;left:12px;right:59px;width:auto;padding:0 10px;background:var(--panel);border:1px solid var(--line);justify-content:flex-start;z-index:5}.searchbox.expanded input{display:block}.searchbox.expanded kbd{display:block}.top-actions{gap:6px}.icon-btn{width:35px;height:35px}.content{padding:22px 14px 35px}.hero{grid-template-columns:1fr;gap:14px}.hero-main{padding:5px 0}.hero-card{min-height:185px;padding:20px}.hero-card h3{max-width:280px}.stats-grid{gap:7px;margin:20px 0 28px}.stat-card{padding:12px 10px}.stat-number{font-size:22px}.stat-label{font-size:8px;letter-spacing:.3px}.stat-foot{font-size:10px}.stage-grid{grid-template-columns:1fr}.stage-card p{min-height:0}.section-head{align-items:flex-start}.section-head h2{font-size:20px}.module-hero{padding:20px 17px}.module-hero:after{font-size:76px;right:8px}.module-hero h1{font-size:27px}.lead{font-size:13px}.panel{padding:15px}.concept-list{grid-template-columns:1fr}.lesson-side{grid-template-columns:1fr}.module-row{padding:12px;gap:10px}.module-index{width:35px;height:35px}.module-row-meta{gap:5px}.module-row-meta .time{display:none}.module-row-copy h3{font-size:12px}.module-row-copy p{font-size:10px}.continue-card{align-items:flex-start;flex-wrap:wrap;padding:13px}.continue-copy{min-width:calc(100% - 65px)}.continue-card .primary-btn{margin-left:59px}.footer{padding:14px;flex-direction:column;gap:5px}.lesson-bottom{align-items:flex-start;flex-wrap:wrap}.lesson-bottom .actions{display:flex;gap:7px}.primary-btn,.secondary-btn,.ghost-btn{padding:10px 11px}.panel-head h2{font-size:15px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

.toast{position:fixed;bottom:22px;left:50%;transform:translate(-50%,20px);opacity:0;pointer-events:none;background:#1b2942;border:1px solid #435577;color:#eef3ff;border-radius:10px;padding:11px 15px;font-size:12px;z-index:100;box-shadow:var(--shadow);transition:.2s}.toast.show{opacity:1;transform:translate(-50%,0)}.light-mode .toast{background:#fff;color:#1a2440;border-color:#dfe4f0}