:root{--radius: 20px;--shadow-sm: 0 1px 2px rgba(20, 40, 25, .05);--shadow: 0 1px 2px rgba(20, 40, 25, .05), 0 14px 30px rgba(30, 70, 40, .1);color-scheme:light;--bg: #F1F6ED;--surface: #FFFFFF;--surface-2: #E7F1E1;--ink: #1F2A22;--muted: #5E6C61;--line: #DBE7D3;--accent: #1F9E57;--accent-ink: #FFFFFF;--accent-2: #FF7A5C;--callout: #E8F6EB;--font-display: "Baloo 2", ui-rounded, "SF Pro Rounded", system-ui, sans-serif;--font-body: "Nunito", system-ui, -apple-system, sans-serif}:root[data-resolved=dark]{color-scheme:dark;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);--shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 16px 40px rgba(0, 0, 0, .5)}:root[data-resolved=light][data-light=meadow]{--bg:#F4F8F3;--surface:#FFFFFF;--surface-2:#EAF2E9;--ink:#17231C;--muted:#5B6B60;--line:#E0EBDD;--accent:#0D9C60;--accent-ink:#FFFFFF;--accent-2:#FF7E63;--callout:#E7F5EE;--radius:14px;--font-display:"Plus Jakarta Sans", system-ui, sans-serif;--font-body:"Plus Jakarta Sans", system-ui, sans-serif}:root[data-resolved=light][data-light=mint]{--bg:#F6FAF9;--surface:#FFFFFF;--surface-2:#EAF3F1;--ink:#132420;--muted:#59696A;--line:#E0ECE9;--accent:#0EA5A0;--accent-ink:#FFFFFF;--accent-2:#127D79;--callout:#E4F4F2;--radius:11px;--font-display:"Hanken Grotesk", system-ui, sans-serif;--font-body:"Hanken Grotesk", system-ui, sans-serif}:root[data-resolved=light][data-light=bloom]{--bg:#F7F8FC;--surface:#FFFFFF;--surface-2:#EEF0F8;--ink:#181B2A;--muted:#5D6172;--line:#E6E8F2;--accent:#12A968;--accent-ink:#FFFFFF;--accent-2:#6C63FF;--callout:#EAF6F0;--radius:14px;--font-display:"Bricolage Grotesque", system-ui, sans-serif;--font-body:"DM Sans", system-ui, sans-serif}:root[data-resolved=light][data-light=citrus]{--bg:#FBFAF2;--surface:#FFFFFF;--surface-2:#F3F2E4;--ink:#22240F;--muted:#6A6B54;--line:#EBE9D6;--accent:#4E9A2E;--accent-ink:#FFFFFF;--accent-2:#F5820A;--callout:#F0F6E3;--radius:16px;--font-display:"Bricolage Grotesque", system-ui, sans-serif;--font-body:"Figtree", system-ui, sans-serif}:root[data-resolved=light][data-light=clay]{--bg:#FBF6F3;--surface:#FFFFFF;--surface-2:#F4EBE6;--ink:#2A211D;--muted:#6E6058;--line:#EEE1DB;--accent:#EE5F4B;--accent-ink:#FFFFFF;--accent-2:#0FB5A6;--callout:#FBEAE5;--radius:14px;--font-display:"Plus Jakarta Sans", system-ui, sans-serif;--font-body:"DM Sans", system-ui, sans-serif}:root[data-resolved=dark][data-dark=forest]{--bg:#0E1A14;--surface:#16241C;--surface-2:#1E2E24;--ink:#E7F0E8;--muted:#93A79A;--line:#274034;--accent:#35C57D;--accent-ink:#06210F;--accent-2:#FF8A6B;--callout:#17281F;--radius:20px;--font-display:"Baloo 2", ui-rounded, system-ui, sans-serif;--font-body:"Nunito", system-ui, sans-serif}:root[data-resolved=dark][data-dark=charcoal]{--bg:#141719;--surface:#1C2023;--surface-2:#24282C;--ink:#ECEFF0;--muted:#99A0A5;--line:#2D3339;--accent:#3ECF82;--accent-ink:#06220F;--accent-2:#FF8663;--callout:#1A2620;--radius:20px;--font-display:"Baloo 2", ui-rounded, system-ui, sans-serif;--font-body:"Nunito", system-ui, sans-serif}:root[data-resolved=dark][data-dark=moss]{--bg:#0C1417;--surface:#14201E;--surface-2:#1C2A28;--ink:#E4EEEC;--muted:#8CA09E;--line:#243733;--accent:#2FD4A8;--accent-ink:#04231C;--accent-2:#FF9270;--callout:#152522;--radius:20px;--font-display:"Baloo 2", ui-rounded, system-ui, sans-serif;--font-body:"Nunito", system-ui, sans-serif}:root[data-resolved=dark][data-dark=glow]{--bg:#0A130E;--surface:#111E16;--surface-2:#182A1F;--ink:#EAF3EC;--muted:#8FA898;--line:#20362A;--accent:#3DDC84;--accent-ink:#04210E;--accent-2:#FF7A5C;--callout:#132419;--radius:20px;--font-display:"Baloo 2", ui-rounded, system-ui, sans-serif;--font-body:"Nunito", system-ui, sans-serif;--shadow: 0 0 0 1px rgba(61,220,132,.08), 0 16px 40px rgba(0,0,0,.55), 0 0 28px rgba(61,220,132,.1)}:root[data-resolved=dark][data-dark=cocoa]{--bg:#17120E;--surface:#201A14;--surface-2:#2A231B;--ink:#F0E8DF;--muted:#AC9E90;--line:#33291F;--accent:#43CB80;--accent-ink:#06210F;--accent-2:#FF8A63;--callout:#231A13;--radius:20px;--font-display:"Baloo 2", ui-rounded, system-ui, sans-serif;--font-body:"Nunito", system-ui, sans-serif}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;font-size:100%}:root[data-text-size=small]{font-size:94%}:root[data-text-size=large]{font-size:112%}:root[data-reduce-motion] *,:root[data-reduce-motion] *:before,:root[data-reduce-motion] *:after{transition:none!important;animation:none!important;scroll-behavior:auto!important}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:1.0625rem;line-height:1.62;-webkit-font-smoothing:antialiased;transition:background .28s ease,color .28s ease}h1,h2,h3,h4{font-family:var(--font-display);line-height:1.14;letter-spacing:-.015em;font-weight:800;text-wrap:balance;margin:0 0 .45em;color:var(--ink)}p{margin:0 0 1em}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;display:block}button{font-family:inherit}:focus-visible{outline:2.5px solid var(--accent);outline-offset:2px;border-radius:6px}.container{max-width:720px;margin:0 auto;padding:0 22px}.wide{max-width:1080px}.appbar{position:sticky;top:0;z-index:40;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:11px 22px;background:color-mix(in srgb,var(--bg) 84%,transparent);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}.brand{display:inline-flex;align-items:center;gap:6px;font-family:var(--font-display);font-weight:800;font-size:18px;color:var(--ink);letter-spacing:-.01em}.brand-mark{font-size:19px;line-height:1}.brand:hover{text-decoration:none}main{padding:30px 0 90px}.tp{display:flex;align-items:center;gap:10px}.modeseg{display:inline-flex;background:var(--surface-2);border:1px solid var(--line);border-radius:999px;padding:3px;gap:2px}.modeseg button{appearance:none;border:0;background:transparent;color:var(--muted);font-size:13px;font-weight:700;line-height:1;padding:6px 10px;border-radius:999px;cursor:pointer;transition:background .15s,color .15s}.modeseg button.on{background:var(--surface);color:var(--ink);box-shadow:var(--shadow-sm)}.tpbtn{appearance:none;display:inline-flex;align-items:center;gap:5px;border:1px solid var(--line);background:var(--surface);color:var(--ink);font-weight:700;font-size:13px;padding:7px 13px;border-radius:999px;cursor:pointer;transition:background .15s}.tpbtn:hover{background:var(--surface-2)}.tp-panel{position:sticky;top:58px;z-index:39;margin:0 auto 6px;max-width:1036px;background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:18px 20px;display:grid;gap:16px}.tp-panel[hidden]{display:none}.tp-group{display:flex;flex-direction:column;gap:10px}.tp-label{margin:0;font-family:var(--font-display);font-weight:800;font-size:13px;color:var(--muted);letter-spacing:.02em}.tp-swatches{display:flex;flex-wrap:wrap;gap:9px}.tp-sw{display:inline-flex;align-items:center;gap:8px;border:1.5px solid var(--line);background:var(--surface);color:var(--ink);padding:7px 12px 7px 8px;border-radius:999px;cursor:pointer;font-weight:700;font-size:13px;transition:border-color .15s,transform .12s}.tp-sw:hover{transform:translateY(-1px)}.tp-sw.on{border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent)}.tp-sw .dot{width:20px;height:20px;border-radius:50%;flex:none;background:var(--sw-a);box-shadow:inset 0 0 0 3px var(--sw-b),0 0 0 1px #80808040}.blocks>*{margin:20px 0}.hook{font-style:italic;color:var(--muted);font-size:1.05rem;margin:0 0 2px}.concept-block{display:flex;flex-direction:column;align-items:flex-start;gap:8px}.concept{font-size:1.06rem;line-height:1.66}.concept p:last-child{margin-bottom:0}.concept .w{border-radius:5px;transition:background .1s,color .1s}.concept .w.spoken{color:var(--accent);background:color-mix(in srgb,var(--accent) 16%,transparent)}.listen{display:inline-flex;align-items:center;gap:6px;cursor:pointer;font-weight:700;font-size:13px;color:var(--accent);background:color-mix(in srgb,var(--accent) 10%,var(--surface));border:1px solid color-mix(in srgb,var(--accent) 32%,var(--line));padding:6px 12px;border-radius:999px;transition:background .15s}.listen:hover{background:color-mix(in srgb,var(--accent) 18%,var(--surface))}.listen.playing{background:color-mix(in srgb,var(--accent) 22%,var(--surface))}.callout{background:var(--callout);border:1px solid color-mix(in srgb,var(--accent) 22%,var(--line));border-radius:var(--radius);padding:15px 17px}.callout .k,.takeaway .k{display:block;font-family:var(--font-display);font-weight:800;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);margin-bottom:6px}.callout-body>:last-child,.takeaway>div>:last-child{margin-bottom:0}.callout--realworld{--callout: color-mix(in srgb, var(--accent-2) 12%, var(--surface));border-color:color-mix(in srgb,var(--accent-2) 30%,var(--line))}.callout--realworld .k{color:var(--accent-2)}.takeaway{background:color-mix(in srgb,var(--accent) 9%,var(--surface));border:1.5px solid color-mix(in srgb,var(--accent) 30%,var(--line));border-radius:var(--radius);padding:15px 17px}.check{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px 17px}.check .q{font-family:var(--font-display);font-weight:800;font-size:1.02rem;margin:0 0 12px}.opts{display:grid;gap:9px}.opt{text-align:left;appearance:none;cursor:pointer;display:flex;align-items:center;gap:10px;background:var(--surface);color:var(--ink);border:1.5px solid var(--line);border-radius:calc(var(--radius) - 6px);padding:11px 14px;font-size:.98rem;font-weight:600;transition:border-color .15s,background .15s}.opt:hover:not([disabled]){border-color:color-mix(in srgb,var(--accent) 55%,var(--line))}.opt .mk{width:20px;height:20px;border-radius:50%;flex:none;display:inline-grid;place-items:center;border:2px solid var(--line);font-size:12px;font-weight:900}.opt.correct{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,var(--surface))}.opt.correct .mk{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}.opt.wrong{border-color:color-mix(in srgb,#e5484d 60%,var(--line));background:color-mix(in srgb,#e5484d 10%,var(--surface))}.opt.wrong .mk{background:#e5484d;color:#fff;border-color:#e5484d}.explain{margin:12px 0 0;font-size:.95rem;color:var(--muted);background:var(--surface-2);border-radius:12px;padding:11px 13px}.explain[hidden]{display:none}.video-frame{position:relative;aspect-ratio:16 / 9;border-radius:calc(var(--radius) - 4px);overflow:hidden;border:1px solid var(--line)}.video-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.lesson-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:6px}.locator{font-family:var(--font-display);font-weight:800;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}.lesson-tools{display:flex;align-items:center;gap:9px}.tool{appearance:none;border:1px solid var(--line);background:var(--surface);color:var(--ink);font-weight:700;font-size:12.5px;padding:6px 11px;border-radius:999px;cursor:pointer}.tool[aria-pressed=true]{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}.streak{display:inline-flex;align-items:center;gap:5px;font-weight:800;font-size:12.5px;background:var(--surface-2);border:1px solid var(--line);padding:5px 10px;border-radius:999px}.lesson-title{font-size:clamp(26px,5vw,36px);margin-bottom:.2em}.duration{color:var(--muted);font-size:.92rem;font-weight:600;margin:0 0 6px}.lesson-foot{margin-top:32px;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:16px}.foot-actions{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}.lesson-nav{display:grid;grid-template-columns:1fr 1fr;gap:10px}.lnav{display:flex;flex-direction:column;gap:2px;padding:12px 15px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);color:inherit;text-decoration:none;transition:border-color .15s,transform .12s;min-width:0}.lnav:hover{border-color:color-mix(in srgb,var(--accent) 50%,var(--line));transform:translateY(-1px);text-decoration:none}.lnav.next{text-align:right;align-items:flex-end}.lnav .dir{font-size:.74rem;font-weight:800;color:var(--accent);text-transform:uppercase;letter-spacing:.06em}.lnav-title{font-family:var(--font-display);font-weight:800;font-size:.96rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:100%}@media(max-width:560px){.lesson-nav{grid-template-columns:1fr}}.cta{display:inline-flex;align-items:center;gap:7px;appearance:none;border:0;cursor:pointer;background:var(--accent);color:var(--accent-ink);font-family:var(--font-display);font-weight:800;font-size:15px;padding:12px 20px;border-radius:var(--radius);transition:filter .15s,transform .12s}.cta:hover{filter:brightness(1.05);transform:translateY(-1px)}.cta.done{background:var(--surface-2);color:var(--ink)}.lesson.focus .blocks>.block{transition:opacity .3s ease,filter .3s ease}.lesson.focus .blocks>.block:not(.focused){opacity:.3;filter:blur(1px);cursor:pointer}.lesson.focus .blocks>.block.focused{opacity:1;filter:none}.hero{padding:12px 0 8px}.eyebrow{font-family:var(--font-display);font-weight:800;font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent);margin:0 0 12px}.hero h1{font-size:clamp(30px,6vw,46px)}.hero .sub{font-size:1.12rem;color:var(--muted);max-width:42ch}.section-title{font-size:1.35rem;margin:34px 0 4px}.section-note{color:var(--muted);margin:0 0 16px;font-size:.98rem}.card-surface{background:var(--surface);border:1px solid var(--line);border-radius:calc(var(--radius) + 4px);box-shadow:var(--shadow);padding:20px 20px 18px}.course-card{display:flex;flex-direction:column;gap:6px}.course-card .meta{color:var(--muted);font-size:.9rem;font-weight:600}.progress-track{height:9px;background:var(--surface-2);border-radius:999px;overflow:hidden;margin-top:4px}.progress-fill{height:100%;background:var(--accent);border-radius:999px}.arrow-link{align-self:flex-start;margin-top:8px;display:inline-flex;align-items:center;gap:6px;font-weight:800;color:var(--accent)}.hero .stat{margin-top:14px;font-weight:800;color:var(--accent);font-size:.96rem;font-family:var(--font-display)}.hero .stat:empty{display:none}.catalog{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(300px,100%),1fr));gap:16px;margin-top:10px}.course-tile{display:flex;flex-direction:column;gap:8px;text-decoration:none;color:inherit;transition:transform .15s ease,box-shadow .15s ease}a.course-tile:hover{transform:translateY(-3px);text-decoration:none}.course-tile.draft{opacity:.72;cursor:default}.ct-top{display:flex;align-items:center;justify-content:space-between}.ct-emoji{font-size:30px;line-height:1}.ct-desc{color:var(--muted);font-size:.95rem;margin:0}.ct-foot{margin-top:auto;display:flex;flex-direction:column;gap:6px;padding-top:8px}.soon-note{margin-top:auto}.soon{font-family:var(--font-display);font-weight:800;font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);background:var(--surface-2);padding:5px 10px;border-radius:999px}.ring{position:relative;width:40px;height:40px;flex:none}.ring svg{display:block}.ring .ring-t{fill:none;stroke:var(--surface-2);stroke-width:3}.ring .ring-v{fill:none;stroke:var(--accent);stroke-width:3;stroke-linecap:round;stroke-dasharray:97.39;stroke-dashoffset:calc(97.39 - 97.39 * var(--p, 0) / 100);transform:rotate(-90deg);transform-box:fill-box;transform-origin:center;transition:stroke-dashoffset .5s ease}.ring b{position:absolute;inset:0;display:grid;place-items:center;font-family:var(--font-display);font-weight:800;font-size:10px;font-variant-numeric:tabular-nums;color:var(--ink)}.back,.ghost-link{display:inline-block;font-weight:700;color:var(--muted)}.back{margin:2px 0 18px}.course-head{display:flex;gap:16px;align-items:flex-start;margin-bottom:14px}.course-emoji{font-size:46px;line-height:1}.course-head .eyebrow{margin-bottom:8px}.course-head h1{font-size:clamp(26px,5vw,38px)}.course-progress{display:flex;flex-direction:column;gap:6px;margin:6px 0 26px}.unit{margin:24px 0}.unit-title{font-size:1.18rem;margin-bottom:12px}.lesson-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px}.lesson-row a{display:flex;align-items:center;gap:13px;padding:13px 15px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);color:inherit;text-decoration:none;transition:border-color .15s,transform .12s}.lesson-row a:hover{border-color:color-mix(in srgb,var(--accent) 50%,var(--line));transform:translateY(-1px)}.lr-check{width:23px;height:23px;border-radius:50%;border:2px solid var(--line);flex:none;display:grid;place-items:center;font-size:12px;font-weight:900;color:transparent}.lesson-row.done .lr-check{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}.lesson-row.done .lr-check:after{content:"✓"}.lr-main{flex:1;display:flex;flex-direction:column;gap:1px;min-width:0}.lr-title{font-family:var(--font-display);font-weight:800}.lr-meta{color:var(--muted);font-size:.85rem}.lr-time{color:var(--muted);font-size:.82rem;font-weight:700;white-space:nowrap}.empty{color:var(--muted)}.quiz-row{display:flex;align-items:center;gap:13px;margin-top:9px;padding:13px 15px;border:1.5px dashed var(--line);border-radius:var(--radius);background:var(--surface);color:inherit;text-decoration:none;transition:border-color .15s,transform .12s}.quiz-row:hover{border-color:color-mix(in srgb,var(--accent) 55%,var(--line));transform:translateY(-1px);text-decoration:none}.quiz-row.passed{border-style:solid;border-color:color-mix(in srgb,var(--accent) 45%,var(--line));background:color-mix(in srgb,var(--accent) 8%,var(--surface))}.qr-icon{font-size:22px;flex:none}.qr-badge{font-family:var(--font-display);font-weight:800;font-size:.82rem;color:var(--accent);white-space:nowrap}.quiz{max-width:640px;margin:0 auto}.quiz-head{margin:6px 0 22px}.quiz-head .eyebrow{margin-bottom:8px}.quiz-head h1{font-size:clamp(23px,4.5vw,31px)}.quiz-progress{height:8px;background:var(--surface-2);border-radius:999px;overflow:hidden;margin:14px 0 7px}.quiz-progress-fill{height:100%;background:var(--accent);border-radius:999px;transition:width .3s ease}.quiz-count{color:var(--muted);font-size:.9rem;font-weight:700;margin:0}.q-card{display:flex;flex-direction:column;gap:15px}.q-card[hidden]{display:none}.q-prompt{font-family:var(--font-display);font-weight:800;font-size:1.28rem;line-height:1.25;margin:0}.q-next{align-self:flex-end}.quiz-results{display:flex;flex-direction:column;align-items:center;text-align:center;gap:8px;padding:16px 0}.quiz-results h2{font-size:1.6rem;margin:8px 0 0}.result-actions{display:flex;align-items:center;gap:18px;margin-top:12px}.ring--lg{width:104px;height:104px}.ring--lg .ring-v{stroke-width:3.2}.ring--lg b{font-size:22px}.appbar-right{display:flex;align-items:center;gap:10px}.streak-chip{display:inline-flex;align-items:center;gap:5px;font-family:var(--font-display);font-weight:800;font-size:13px;background:var(--surface-2);border:1px solid var(--line);padding:6px 11px;border-radius:999px;color:var(--ink);font-variant-numeric:tabular-nums}.streak-chip[hidden]{display:none}@media(max-width:560px){.appbar{padding:10px 12px;gap:8px}.appbar-right{gap:7px}.brand-name{display:none}.brand-mark{font-size:22px}.tp-label-txt{display:none}.tp{gap:7px}.modeseg button{padding:6px 9px}.streak-chip{padding:5px 9px}.icon-btn{padding:7px 10px}}@media(max-width:380px){.streak-chip{display:none}}.settings-panel{position:sticky;top:58px;z-index:39;margin:0 auto 6px;background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:18px 20px}.settings-panel[hidden]{display:none}.set-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}.set-group{display:flex;flex-direction:column;gap:11px}.set-group[hidden]{display:none}.set-label{margin:0;font-family:var(--font-display);font-weight:800;font-size:13px;color:var(--muted);letter-spacing:.02em}.seg{display:inline-flex;align-self:flex-start;background:var(--surface-2);border:1px solid var(--line);border-radius:999px;padding:3px;gap:2px}.seg button{border:0;background:transparent;color:var(--muted);cursor:pointer;border-radius:999px;padding:4px 14px;font-weight:800;font-family:var(--font-display);line-height:1}.seg button:nth-child(1){font-size:12px}.seg button:nth-child(2){font-size:15px}.seg button:nth-child(3){font-size:19px}.seg button.on{background:var(--surface);color:var(--ink);box-shadow:var(--shadow-sm)}.set-switch{display:flex;align-items:center;gap:10px;font-size:13.5px;font-weight:600;cursor:pointer}.set-switch input{position:absolute;opacity:0;width:0;height:0}.track{flex:none;width:38px;height:22px;border-radius:999px;background:var(--surface-2);border:1.5px solid var(--line);position:relative;transition:background .2s,border-color .2s}.thumb{position:absolute;top:2px;left:2px;width:16px;height:16px;border-radius:50%;background:var(--muted);box-shadow:0 1px 2px #00000040;transition:transform .2s,background .2s}.set-switch:hover .track{border-color:color-mix(in srgb,var(--accent) 40%,var(--line))}.set-switch input:checked+.track{background:var(--accent);border-color:var(--accent)}.set-switch input:checked+.track .thumb{transform:translate(16px);background:#fff}.set-switch input:focus-visible+.track{outline:2px solid var(--accent);outline-offset:2px}.set-group .row{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13px;font-weight:600}.set-group select{font:600 12px/1 var(--font-body);color:var(--ink);background:var(--surface-2);border:1px solid var(--line);border-radius:9px;padding:7px 8px;max-width:150px}.sync-row{gap:8px}.sync-row input{flex:1;min-width:0;font:600 12px/1 var(--font-body);color:var(--ink);background:var(--surface-2);border:1px solid var(--line);border-radius:9px;padding:9px}.mini-btn{flex:none;border:1px solid var(--accent);background:var(--accent);color:var(--accent-ink);font-family:var(--font-display);font-weight:800;font-size:12px;padding:9px 13px;border-radius:9px;cursor:pointer}.set-note{margin:0;font-size:11.5px;line-height:1.4;color:var(--muted)}.attempts{width:100%;max-width:340px;margin:10px auto 0;text-align:left}.attempts-title{font-family:var(--font-display);font-weight:800;font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;margin:0 0 7px}.attempt-row{display:flex;justify-content:space-between;padding:8px 12px;border:1px solid var(--line);border-radius:10px;margin-bottom:6px;font-size:13px;font-weight:700}.attempt-row .a-when{color:var(--muted);font-weight:600}.attempt-row.pass{border-color:color-mix(in srgb,var(--accent) 45%,var(--line));color:var(--accent)}.appbar-left{display:flex;align-items:center;gap:12px}.icon-btn{appearance:none;border:1px solid var(--line);background:var(--surface);color:var(--ink);font-size:15px;line-height:1;padding:8px 11px;border-radius:10px;cursor:pointer;transition:background .15s}.icon-btn:hover{background:var(--surface-2)}.shell{display:flex;align-items:flex-start}main{flex:1;min-width:0}.sidebar{position:sticky;top:56px;align-self:flex-start;height:calc(100vh - 56px);width:262px;flex:none;overflow-y:auto;overscroll-behavior:contain;border-right:1px solid var(--line);padding:16px 12px 40px;display:flex;flex-direction:column;gap:4px}body.sb-collapsed .sidebar{display:none}.sb-home{font-family:var(--font-display);font-weight:800;font-size:.95rem;color:var(--ink);padding:8px 10px;border-radius:10px}.sb-home:hover,.sb-course:hover,.sb-lesson:hover{background:var(--surface-2);text-decoration:none}.sb-home.active{color:var(--accent)}.sb-subject{margin-top:14px}.sb-subject-title{font-family:var(--font-display);font-weight:800;font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin:0 0 6px;padding:0 10px}.sb-courses,.sb-lessons{list-style:none;margin:0;padding:0}.sb-course{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:10px;color:var(--ink);font-weight:700;font-size:.92rem}.sb-emoji{font-size:1.05rem;flex:none}.sb-course-item.open>.sb-course{color:var(--accent)}.sb-lessons{display:none;margin:2px 0 8px 20px;padding-left:12px;border-left:1px solid var(--line)}.sb-course-item.open .sb-lessons{display:block}.sb-lesson{display:block;padding:6px 10px;border-radius:8px;color:var(--muted);font-size:.85rem;font-weight:600;line-height:1.3}.sb-lesson.active{color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,transparent)}.sb-overlay{display:none}@media(max-width:900px){.sidebar{position:fixed;left:0;top:56px;z-index:60;width:280px;max-width:82vw;background:var(--bg);transform:translate(-100%);transition:transform .25s ease;box-shadow:var(--shadow)}body.sb-open .sidebar{transform:none}body.sb-collapsed .sidebar{display:flex}.sb-overlay{display:block;position:fixed;inset:56px 0 0;background:#00000073;z-index:55}.sb-overlay[hidden]{display:none}}.figure{margin:22px 0}.figure-media{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px}.figure-media svg{display:block;width:100%;height:auto;max-width:440px;margin:0 auto;color:var(--ink)}.figure-cap{margin:9px 4px 0;text-align:center;color:var(--muted);font-size:.86rem;line-height:1.45}.dgm-ink{fill:var(--ink)}.dgm-ink-s{fill:none;stroke:var(--ink)}.dgm-acc{fill:var(--accent)}.dgm-acc-s{fill:none;stroke:var(--accent)}.dgm-mut{fill:var(--muted)}.dgm-mut-s{fill:none;stroke:var(--muted)}.dgm-soft{fill:var(--surface-2)}.dgm-box{fill:var(--surface);stroke:var(--line);stroke-width:1.5}.dgm-box-acc{fill:color-mix(in srgb,var(--accent) 13%,var(--surface));stroke:color-mix(in srgb,var(--accent) 42%,var(--line));stroke-width:1.5}.dgm-t{fill:var(--ink);font-family:var(--font-body);font-weight:700}.dgm-t-mut{fill:var(--muted);font-family:var(--font-body);font-weight:600}.dgm-t-acc{fill:var(--accent);font-family:var(--font-body);font-weight:800}@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important;scroll-behavior:auto!important}}