:root{color:#e7eee9;--bg:#101a1c;--panel:#172325;--surface:#1b2a2c;--line:#304246;--text:#e7eee9;--muted:#a6b7b3;--accent:#b9d39d;--ink:#15211a;--error:#ffc0ac;--success:#b4deb0;--shadow:0 16px 50px #0002;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;background:#101a1c;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}:root[data-theme=paper]{--bg:#f5f3ed;--panel:#fffdfa;--surface:#eceee6;--line:#d2d8ca;--text:#25362d;--muted:#526459;--accent:#315d3c;--ink:#fff;--error:#a52b22;--success:#2e6137;--shadow:0 16px 50px #3344220a;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;background:var(--bg);color:var(--text)}*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button,a,input,textarea,select{outline-offset:4px}button{border:1px solid var(--line);background:var(--surface);color:var(--text);cursor:pointer;border-radius:9px;padding:11px 16px;transition:background .15s}button:hover:not(:disabled){border-color:var(--accent)}button:disabled{opacity:.55;cursor:default}button.primary{background:var(--accent);color:var(--ink);border-color:var(--accent);font-weight:650}button.quiet{color:var(--muted);background:0 0;border-color:#0000;padding-left:0}a{color:var(--accent)}input,textarea,select{border:1px solid var(--line);width:100%;color:var(--text);background:var(--bg);border-radius:8px;margin:8px 0 16px;padding:12px}input[type=radio],input[type=checkbox]{width:auto;accent-color:var(--accent);margin:0 12px 0 0}input[type=range]{padding:0}label{color:var(--muted);line-height:1.5;display:block}h1,h2,h3{color:var(--text);letter-spacing:-.025em;line-height:1.18}h1{font-size:clamp(28px,3vw,43px);font-weight:650}h2{font-size:24px;font-weight:600}h3{font-size:20px;font-weight:600}p{line-height:1.75}small,.muted{color:var(--muted)}pre{white-space:pre-wrap;overflow-wrap:anywhere;background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:16px;font-size:13px;line-height:1.6}code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace}.eyebrow{letter-spacing:.13em;color:var(--muted);font-size:11px;font-weight:650}.app-shell{grid-template-columns:263px minmax(0,1fr);min-height:100vh;display:grid}.sidebar{border-right:1px solid var(--line);background:var(--panel);flex-direction:column;height:100vh;padding:28px 16px 22px;display:flex;position:sticky;top:0;overflow:auto}.brand{text-align:left;background:0 0;border:0;align-items:center;gap:15px;padding:0 10px 24px;font-size:17px;line-height:1.25;display:flex}.brand-mark{border:1px solid var(--accent);width:46px;height:46px;color:var(--accent);border-radius:12px;place-items:center;font-family:Georgia,serif;font-size:26px;display:grid}.sidebar>.eyebrow{padding-left:12px}.sidebar nav{flex-direction:column;gap:3px;display:flex}.world{text-align:left;min-height:46px;color:var(--muted);background:0 0;border:1px solid #0000;align-items:center;gap:10px;padding:11px 10px;font-size:12px;line-height:1.4;display:flex}.world.active{color:var(--text);background:var(--surface);border-color:var(--line)}.world-number{color:var(--accent);min-width:22px;font-size:10px}.sidebar-bottom{border-top:1px solid var(--line);gap:8px;margin-top:30px;padding-top:20px;display:grid}.sidebar-bottom button{text-align:left;color:var(--muted);background:0 0;border:0;font-size:13px}.workspace{width:100%;max-width:1440px;margin:auto;padding:0 clamp(22px,5vw,78px) 28px}.topbar{border-bottom:1px solid var(--line);height:86px;color:var(--muted);justify-content:space-between;align-items:center;margin-bottom:42px;font-size:12px;display:flex}.controls{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.topbar button{font-size:12px}.theme-choice{align-items:center;gap:10px;font-size:12px;display:flex}.theme-choice select{width:100px;margin:0;padding:8px}.hero{justify-content:space-between;align-items:center;gap:20px;padding:5px 0 34px;display:flex}.hero p{max-width:600px;color:var(--muted)}.hero h1{max-width:560px;margin:14px 0}.hero-map{opacity:.8;flex-shrink:0;width:280px;max-width:32%}.hero-map path{fill:none;stroke:var(--line);stroke-width:2px;stroke-dasharray:5 7}.hero-map circle{fill:var(--bg);stroke:var(--accent);stroke-width:2px}.hero-map text{fill:var(--muted);letter-spacing:1px;font-size:9px}.pill{border:1px solid var(--line);color:var(--muted);border-radius:20px;padding:8px 11px;font-size:11px}.section-heading{justify-content:space-between;align-items:center;gap:20px;margin:10px 0 20px;display:flex}.section-heading h2{font-size:20px}.section-heading span{color:var(--muted);font-size:11px}.lesson-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;display:grid}.lesson-card{border:1px solid var(--line);background:var(--panel);box-shadow:var(--shadow);border-radius:13px;padding:25px}.card-top{justify-content:space-between;align-items:center;display:flex}.dot{background:var(--accent);border-radius:50%;width:6px;height:6px}.lesson-card h3{margin:25px 0 14px;font-size:24px}.lesson-card p{min-height:65px;color:var(--muted);overflow-wrap:anywhere;font-size:13px}.lesson-card button{justify-content:space-between;width:100%;margin-top:20px;font-size:13px;display:flex}.notice{border:1px solid var(--line);background:var(--panel);border-radius:12px;margin:28px 0;padding:24px 28px}.notice h3{margin-top:0;font-size:16px}.notice p{color:var(--muted);margin-bottom:0;font-size:13px}.lesson-player{max-width:850px;margin:auto}.lesson-player>.eyebrow{margin-top:26px}.lesson-player h1{font-size:38px}.outcomes{flex-wrap:wrap;gap:8px;margin:22px 0;display:flex}.outcomes span{background:var(--surface);color:var(--muted);border-radius:7px;padding:9px 11px;font-size:12px}.reading{margin:30px 0 40px;font-size:17px;line-height:1.8}.reading p{margin-bottom:22px}.visual{border:1px solid var(--line);background:var(--panel);border-radius:13px;margin:20px 0 28px;padding:24px}.visual p{color:var(--muted);font-size:13px}.visual svg{width:100%;color:var(--muted)}.visual .flow-node rect{fill:var(--surface);stroke:var(--line)}.visual .flow-node path{stroke:var(--muted);stroke-width:2px;fill:none}.visual .flow-node text{fill:var(--muted);font-size:12px}.visual .flow-node.active rect{stroke:var(--accent);stroke-width:2px}.visual .flow-node.active text{fill:var(--text)}.split{grid-template-columns:1fr 1fr;gap:18px;display:grid}.data-card{border:1px solid var(--line);background:var(--surface);overflow-wrap:anywhere;border-radius:9px;flex-direction:column;gap:12px;padding:18px;display:flex}.data-card span{color:var(--muted);font-size:12px}.data-card code{font-size:24px}.trace{border-left:2px solid var(--accent);background:var(--surface);overflow-wrap:anywhere;padding:8px 16px;color:var(--text)!important}.file-tree{border:1px solid var(--line);border-radius:9px;padding:18px}.tree-folder{background:0 0;border:0;margin:10px 0;padding:8px 0;display:block}.tree-file{color:var(--accent);overflow-wrap:anywhere;margin-left:28px}.worked-example{background:var(--surface);border-radius:12px;margin:25px 0;padding:22px 26px}.worked-example p:last-child{margin-bottom:0}.misconception{border-left:3px solid var(--accent);margin:30px 0;padding:5px 22px}.misconception strong{font-size:13px}.misconception p{color:var(--muted);font-size:14px}.practice{margin:50px 0}.practice fieldset{border:0;margin:20px 0;padding:15px 0}.practice legend{padding:0;font-size:16px;font-weight:600}.answer-option{border:1px solid var(--line);color:var(--text);border-radius:9px;align-items:center;margin:10px 0;padding:14px;font-size:14px;display:flex}.answer-option:has(input:checked){border-color:var(--accent);background:var(--surface)}.practice textarea{min-height:120px}.practice label p{font-size:14px}.feedback{border:1px solid var(--line);background:var(--panel);border-radius:12px;margin-top:25px;padding:24px}.feedback p{font-size:13px}.hint{background:var(--surface);border-radius:8px;padding:16px}.success{color:var(--success)!important}.error{color:var(--error)!important}.status{color:var(--muted);border-left:2px solid var(--accent);padding-left:16px;font-size:13px}.banner{border:1px solid var(--line);border-radius:8px;padding:12px 18px;font-size:13px}.banner button{margin-left:15px}.sources{border-top:1px solid var(--line);padding:18px 0}.sources h2{font-size:18px}.sources p{color:var(--muted);font-size:13px}.sources a{font-size:13px;line-height:2;display:block}.code-diff{background:var(--bg);border:1px solid var(--line);overflow-wrap:anywhere;border-radius:8px;margin-bottom:16px;padding:16px}.code-diff code{font-size:13px;line-height:2;display:block}.removed{color:var(--error)}.added{color:var(--success)}.toggle{align-items:center;margin:16px 0;font-size:13px;display:flex}.visual table{border-collapse:collapse;width:100%;margin:20px 0;font-size:12px}.visual th,.visual td{text-align:left;border-bottom:1px solid var(--line);padding:12px 5px}.chart-track{fill:var(--surface)}.chart-value{fill:var(--accent)}.visual svg>text{fill:var(--muted);font-size:12px}.visual blockquote{border-left:2px solid var(--line);margin:20px 0;padding:5px 18px;font-size:14px;line-height:1.7}.policy{border:1px solid var(--line);border-radius:9px;padding:18px;font-weight:600}.memory-card{margin:16px 0}.login{max-width:460px;margin:10vh auto;padding:30px}.login .brand-mark{margin-bottom:35px}.login h1{font-size:40px}.login form{margin:30px 0}.login button{width:100%}footer{color:var(--muted);border-top:1px solid var(--line);margin-top:55px;padding-top:24px;font-size:10px;line-height:1.7}[data-focus=true] .hero-map{display:none}[data-focus=true] *{transition:none!important;animation:none!important}@media (width<=1000px){.app-shell{grid-template-columns:220px minmax(0,1fr)}.workspace{padding:0 24px 24px}.lesson-grid{grid-template-columns:1fr}.hero-map{display:none}.section-heading{display:block}.world{font-size:11px}.sidebar{padding:22px 12px}}@media (width<=700px){.app-shell{display:block}.sidebar{border-right:0;border-bottom:1px solid var(--line);height:auto;padding:16px;position:relative}.brand{padding-bottom:12px}.sidebar>.eyebrow{display:none}.sidebar nav{flex-direction:row;padding-bottom:4px;overflow:auto}.world{flex-shrink:0;max-width:170px;min-height:42px;padding:8px}.sidebar-bottom{flex-wrap:wrap;gap:10px;margin:12px 0 0;padding-top:10px;display:flex}.sidebar-bottom button{padding:8px 0;font-size:11px}.workspace{padding:0 18px 25px}.topbar{height:75px;margin-bottom:25px}.topbar>.controls{gap:7px}.topbar button{padding:8px;font-size:10px}.theme-choice span{display:none}.theme-choice select{width:80px;font-size:11px}.hero h1,.lesson-player h1{font-size:29px}.hero{padding-bottom:20px}.reading{font-size:16px}.visual{padding:15px}.split{grid-template-columns:1fr}.visual .controls button{padding:9px;font-size:11px}.visual .flow-node text{font-size:11px}.controls{gap:10px}.practice button{font-size:12px}.notice{padding:20px}.login{margin-top:6vh;padding:25px}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}.tutor-message{white-space:pre-wrap;overflow-wrap:anywhere}.exam-topic{border-bottom:1px solid var(--line);padding:12px 0}.exam-topic p{margin:4px 0 12px;font-size:.9rem}.voice-exam{margin-top:1.5rem}.voice-exam>.toggle{align-items:flex-start;margin:1rem 0;line-height:1.5}.voice-exam audio{display:none}.transcript{margin:1.5rem 0}.speech{border-left:3px solid var(--accent,#9be3bd);overflow-wrap:anywhere;margin:.7rem 0;padding:.7rem 1rem}.speech.examiner{border-color:var(--muted,#98a6b7);opacity:.92}.speech p{white-space:pre-wrap;margin:.4rem 0}.voice-exam textarea{box-sizing:border-box;width:100%;min-height:7rem}.voice-exam .controls{flex-wrap:wrap}.study-sections{border-top:1px solid var(--line,#344745);padding:1.5rem 0}.study-sections nav ol{flex-wrap:wrap;gap:.6rem;padding:0;list-style:none;display:flex}.study-sections nav button[aria-current=step]{border-color:var(--accent,#afd49a);font-weight:700}.prediction{border:1px solid var(--line,#344745);border-radius:12px;padding:1rem}.prediction textarea{box-sizing:border-box;width:100%;margin:.8rem 0;display:block}.takeaway{border-left:3px solid var(--accent,#afd49a);margin:1rem 0;padding:.8rem 1.1rem}.glossary dl>div{border-bottom:1px solid var(--line,#344745);grid-template-columns:minmax(110px,1fr) 3fr;gap:1rem;padding:.8rem 0;display:grid}.glossary dt{font-weight:700}.glossary dd{margin:0}.structured-task{border-top:1px solid var(--line,#344745);padding:1.3rem 0}.structured-task>div>input,.structured-task>div>select{box-sizing:border-box;width:100%;margin:.5rem 0 1rem;display:block}.order-task{grid-template-columns:1fr 1fr;gap:1.5rem;display:grid}.order-task>div>button{text-align:left;white-space:normal;margin:.7rem 0;display:block}.order-task li{margin-bottom:1rem}.bit-cells{grid-template-columns:repeat(8,minmax(0,1fr));gap:.4rem;display:grid}.bit-cells button{min-width:0;padding:.7rem .2rem}.bit-cells strong,.bit-cells small{display:block}.bit-cells .on{background:var(--accent,#afd49a);color:#14211d}.encoding-cells{flex-wrap:wrap;gap:.6rem;margin:1rem 0;display:flex}.encoding-cells .data-card{flex:0 auto;min-width:70px;padding:.7rem}.encoding-cells code{font-size:.75rem}.path-parts{flex-wrap:wrap;gap:.5rem;margin:1rem 0;display:flex}.path-parts span{border:1px solid var(--line,#344745);overflow-wrap:anywhere;border-radius:8px;padding:.5rem .7rem}@media (width<=650px){.order-task{grid-template-columns:1fr}.glossary dl>div{grid-template-columns:1fr;gap:.4rem}.bit-cells{gap:.2rem}.bit-cells small{font-size:.65rem}}.prerequisites button{text-align:left;white-space:normal;margin:.5rem 0;display:block}.route-return .controls{flex-wrap:wrap}.route-return button{white-space:normal;text-align:left}.code-practice textarea{tab-size:4;min-height:20rem;font-family:ui-monospace,SFMono-Regular,Consolas,Liberation Mono,monospace;line-height:1.5}
