:root{--sidebar-w: 300px;--topbar-h: 66px;--bg: #f6f5f0;--bg-soft: #efeee7;--surface: #ffffff;--surface-2: #fbfaf6;--surface-3: #f1efe8;--ink: #1b2430;--ink-2: #33404f;--muted: #5f6c7b;--muted-2: #85909d;--line: #e2dfd5;--line-strong: #cfcabd;--accent: #3355c8;--accent-ink: #2743a6;--accent-soft: #e9edfb;--accent-2: #0e7c6b;--accent-2-soft: #e2f4ef;--gold: #a86a12;--gold-soft: #fbf1dc;--danger: #b42318;--danger-soft: #fdecea;--success: #157347;--success-soft: #e4f5ec;--violet: #6b3fa0;--violet-soft: #f1e9fb;--sidebar-bg: #131a26;--sidebar-bg-2: #182231;--sidebar-ink: #dbe3ef;--sidebar-muted: #93a1b5;--sidebar-line: #263244;--sidebar-active: #22314a;--shadow-sm: 0 1px 2px rgba(24, 32, 44, .06), 0 2px 8px rgba(24, 32, 44, .04);--shadow-md: 0 4px 14px rgba(24, 32, 44, .07), 0 12px 30px rgba(24, 32, 44, .06);--shadow-lg: 0 18px 60px rgba(16, 24, 38, .18);--radius: 14px;--radius-sm: 9px;--radius-lg: 22px;--serif: "Newsreader", Georgia, "Times New Roman", serif;--sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;--prose-size: 17px;--prose-width: 860px}[data-theme=dark]{--bg: #0d1219;--bg-soft: #111822;--surface: #151d28;--surface-2: #18212e;--surface-3: #1d2837;--ink: #e9eef5;--ink-2: #cbd5e1;--muted: #9aa8ba;--muted-2: #78879a;--line: #273344;--line-strong: #37465c;--accent: #7d9bff;--accent-ink: #a8bcff;--accent-soft: #1c2a4d;--accent-2: #45d0b0;--accent-2-soft: #10362f;--gold: #e0b163;--gold-soft: #3a2d16;--danger: #ff8b80;--danger-soft: #3d1d1a;--success: #5fd39a;--success-soft: #143528;--violet: #c3a1f2;--violet-soft: #2d2140;--sidebar-bg: #0a0f16;--sidebar-bg-2: #101823;--sidebar-line: #1e2a3a;--sidebar-active: #1a2941;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3), 0 2px 8px rgba(0, 0, 0, .2);--shadow-md: 0 6px 20px rgba(0, 0, 0, .35);--shadow-lg: 0 24px 70px rgba(0, 0, 0, .55)}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{margin:0;font-family:var(--sans);font-size:16px;line-height:1.65;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}img,svg,canvas{max-width:100%}button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer;background:none;border:0}a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:3px}a:hover{color:var(--accent-ink)}h1,h2,h3,h4,h5{line-height:1.22;margin:0}p{margin:0 0 1em}ul,ol{margin:0 0 1em;padding-left:1.4em}li{margin:.3em 0}hr{border:0;border-top:1px solid var(--line);margin:2rem 0}::selection{background:var(--accent-soft);color:var(--accent-ink)}:focus-visible{outline:3px solid color-mix(in srgb,var(--accent) 45%,transparent);outline-offset:2px;border-radius:4px}*{scrollbar-width:thin;scrollbar-color:var(--line-strong) transparent}*::-webkit-scrollbar{width:10px;height:10px}*::-webkit-scrollbar-thumb{background:var(--line-strong);border-radius:10px;border:3px solid var(--bg)}*::-webkit-scrollbar-track{background:transparent}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;left:12px;top:-60px;z-index:200;background:var(--accent);color:#fff;padding:10px 16px;border-radius:8px;transition:top .2s}.skip-link:focus{top:12px;color:#fff}.app{display:flex;min-height:100vh}.workspace{flex:1;min-width:0;margin-left:var(--sidebar-w);display:flex;flex-direction:column;min-height:100vh}.main{width:100%;max-width:1220px;margin:0 auto;padding:36px 46px 90px;flex:1}.sidebar{position:fixed;inset:0 auto 0 0;width:var(--sidebar-w);z-index:70;display:flex;flex-direction:column;background:radial-gradient(600px 300px at -10% -5%,#22345a 0%,transparent 60%),linear-gradient(180deg,var(--sidebar-bg) 0%,var(--sidebar-bg-2) 100%);color:var(--sidebar-ink);border-right:1px solid var(--sidebar-line);transition:transform .28s ease}.brand{display:flex;align-items:center;gap:12px;padding:22px 22px 18px;border-bottom:1px solid var(--sidebar-line)}.brand-mark{width:42px;height:42px;flex:0 0 42px;border-radius:11px;display:grid;place-items:center;background:linear-gradient(145deg,#3355c8,#0e7c6b);color:#fff;font:700 19px/1 var(--serif);box-shadow:inset 0 1px #ffffff47,0 6px 18px #143ca059;letter-spacing:-.5px}.brand-text{min-width:0}.brand-title{font-weight:700;font-size:15px;letter-spacing:.1px;color:#fff}.brand-sub{font-size:11.5px;color:var(--sidebar-muted);letter-spacing:.08em;text-transform:uppercase;margin-top:2px}.sidebar-progress{padding:16px 22px 14px;border-bottom:1px solid var(--sidebar-line)}.sidebar-progress-top{display:flex;justify-content:space-between;align-items:baseline;font-size:11.5px;color:var(--sidebar-muted);letter-spacing:.04em;text-transform:uppercase;margin-bottom:8px}.sidebar-progress-top strong{color:#fff;font-size:13px;letter-spacing:0}.sidebar-progress .track{background:#263244;height:6px;border-radius:99px;overflow:hidden}.sidebar-progress .fill{height:100%;width:0%;background:linear-gradient(90deg,#4f74e8,#45d0b0);border-radius:99px;transition:width .45s cubic-bezier(.2,.7,.2,1)}.sidebar-nav{flex:1;overflow-y:auto;padding:12px 12px 18px}.nav-section-label{font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:#6f7f95;padding:16px 12px 7px;font-weight:600}.nav-item{display:flex;align-items:center;gap:11px;padding:8px 12px;border-radius:8px;color:#b8c4d6;font-size:13.5px;text-decoration:none;line-height:1.35;transition:background .15s,color .15s;position:relative}.nav-item:hover{background:#ffffff0e;color:#fff}.nav-item.active{background:var(--sidebar-active);color:#fff}.nav-item.active:before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:3px;background:#45d0b0}.nav-num{flex:0 0 25px;height:25px;border-radius:7px;display:grid;place-items:center;background:#ffffff12;font-size:11px;font-weight:700;color:#cfd9e8;font-variant-numeric:tabular-nums}.nav-item.active .nav-num{background:#7d9bff38;color:#fff}.nav-item.done .nav-num{background:#45d0b029;color:#63e0c2}.nav-text{flex:1;min-width:0}.nav-item .nav-check{color:#45d0b0;font-size:12px;opacity:0}.nav-item.done .nav-check{opacity:1}.nav-item.special{font-weight:600}.nav-sub{margin:2px 0 6px 36px;padding-left:10px;border-left:1px solid var(--sidebar-line);display:none}.has-sub.open .nav-sub{display:block}.nav-sub a{display:block;color:#8f9db1;text-decoration:none;font-size:12.5px;padding:5px 8px;border-radius:6px;line-height:1.35;transition:color .12s,background .12s}.nav-sub a:hover{color:#fff;background:#ffffff0d}.nav-sub a.active{color:#bcd0ff;background:#7d9bff1a}.nav-sub a.done{color:#7fcdb9}.sidebar-footer{padding:14px 20px 16px;border-top:1px solid var(--sidebar-line);font-size:11px;color:#6f7f95;line-height:1.5}.sidebar-footer a{color:#93a1b5}.sidebar-footer .dot{color:#45d0b0}.topbar{position:sticky;top:0;z-index:50;height:var(--topbar-h);display:flex;align-items:center;gap:16px;padding:0 28px;background:color-mix(in srgb,var(--bg) 84%,transparent);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.icon-btn{width:38px;height:38px;border-radius:9px;display:inline-grid;place-items:center;color:var(--ink-2);border:1px solid transparent;transition:background .15s,border-color .15s}.icon-btn:hover{background:var(--surface);border-color:var(--line)}.menu-btn{display:none}.crumbs{display:flex;align-items:center;gap:7px;font-size:13px;color:var(--muted);min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.crumbs b{color:var(--ink);font-weight:600}.crumbs .sep{color:var(--muted-2)}.topbar-spacer{flex:1}.topbar-actions{display:flex;align-items:center;gap:6px}.search-trigger{display:flex;align-items:center;gap:9px;height:38px;padding:0 10px 0 13px;border:1px solid var(--line);background:var(--surface);border-radius:9px;color:var(--muted);font-size:13px;min-width:210px;transition:border-color .15s,box-shadow .15s}.search-trigger:hover{border-color:var(--line-strong);box-shadow:var(--shadow-sm)}.search-trigger svg{flex:0 0 auto;opacity:.75}.search-trigger .kbd{margin-left:auto}.kbd{font-family:var(--sans);font-size:10.5px;font-weight:600;color:var(--muted);background:var(--surface-3);border:1px solid var(--line);border-bottom-width:2px;border-radius:5px;padding:1px 5px;line-height:1.45}.topbar .chip-btn{height:38px;padding:0 12px;display:inline-flex;align-items:center;gap:7px;border:1px solid var(--line);border-radius:9px;background:var(--surface);font-size:13px;color:var(--ink-2);font-weight:500}.topbar .chip-btn:hover{border-color:var(--line-strong);box-shadow:var(--shadow-sm)}.progress-pill{display:flex;align-items:center;gap:8px;height:38px;padding:0 13px;border:1px solid var(--line);border-radius:9px;background:var(--surface);font-size:12.5px;color:var(--muted)}.progress-pill strong{color:var(--ink);font-size:13px}.progress-pill .mini-track{width:58px;height:5px;background:var(--surface-3);border-radius:99px;overflow:hidden}.progress-pill .mini-fill{height:100%;width:0%;background:linear-gradient(90deg,var(--accent),var(--accent-2));border-radius:99px;transition:width .4s}.scrim{position:fixed;inset:0;background:#080d148c;z-index:65;opacity:0;pointer-events:none;transition:opacity .25s;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.scrim.show{opacity:1;pointer-events:auto}.site-footer{border-top:1px solid var(--line);padding:22px 46px 30px;font-size:12.5px;color:var(--muted);display:flex;flex-wrap:wrap;gap:8px 18px;align-items:center;justify-content:space-between;max-width:1220px;margin:0 auto;width:100%}.site-footer .muted{color:var(--muted-2)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:42px;padding:0 18px;border-radius:9px;border:1px solid var(--line-strong);background:var(--surface);color:var(--ink);font-size:14px;font-weight:600;text-decoration:none;transition:transform .12s,box-shadow .15s,background .15s,border-color .15s;white-space:nowrap}.btn:hover{border-color:var(--muted-2);box-shadow:var(--shadow-sm);color:var(--ink)}.btn:active{transform:translateY(1px)}.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff;box-shadow:0 2px #00000014,0 8px 20px color-mix(in srgb,var(--accent) 22%,transparent)}.btn.primary:hover{background:var(--accent-ink);border-color:var(--accent-ink);color:#fff}.btn.ghost{background:transparent;border-color:transparent;color:var(--muted)}.btn.ghost:hover{background:var(--surface-3);color:var(--ink)}.btn.small{height:34px;padding:0 12px;font-size:12.5px;border-radius:8px}.btn.tiny{height:28px;padding:0 9px;font-size:11.5px;border-radius:6px;gap:5px}.btn.success{background:var(--success);border-color:var(--success);color:#fff}.btn[disabled]{opacity:.5;cursor:not-allowed}.btn-block{width:100%}.chip{display:inline-flex;align-items:center;gap:6px;padding:4px 9px;border-radius:99px;font-size:11.5px;font-weight:600;letter-spacing:.02em;background:var(--surface-3);color:var(--muted);border:1px solid transparent;white-space:nowrap}.chip.accent{background:var(--accent-soft);color:var(--accent-ink)}.chip.teal{background:var(--accent-2-soft);color:var(--accent-2)}.chip.gold{background:var(--gold-soft);color:var(--gold)}.chip.red{background:var(--danger-soft);color:var(--danger)}.chip.violet{background:var(--violet-soft);color:var(--violet)}.chip.outline{background:transparent;border-color:var(--line)}.dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:currentColor}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm)}.card-pad{padding:22px 24px}.view{display:none;animation:fadeUp .32s ease}.view.active{display:block}@keyframes fadeUp{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}.dash-hero{position:relative;overflow:hidden;border-radius:var(--radius-lg);border:1px solid var(--line);background:radial-gradient(900px 380px at 92% -20%,color-mix(in srgb,var(--accent) 16%,transparent) 0%,transparent 62%),radial-gradient(700px 420px at 4% 120%,color-mix(in srgb,var(--accent-2) 14%,transparent) 0%,transparent 60%),var(--surface);padding:42px 44px 40px;margin-bottom:28px;box-shadow:var(--shadow-md)}.dash-hero:after{content:"";position:absolute;inset:0;pointer-events:none;background-image:radial-gradient(color-mix(in srgb,var(--ink) 8%,transparent) 1px,transparent 1px);background-size:22px 22px;opacity:.22;mask-image:linear-gradient(100deg,transparent 30%,#000 100%);-webkit-mask-image:linear-gradient(100deg,transparent 30%,#000 100%)}.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:36px;align-items:center}.hero-kicker{display:inline-flex;align-items:center;gap:8px;font-size:11.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:12px}.hero-kicker:before{content:"";width:22px;height:2px;background:var(--accent);border-radius:2px}.dash-hero h1{font-family:var(--serif);font-size:clamp(34px,4vw,52px);font-weight:600;letter-spacing:-.022em;line-height:1.05;margin:0 0 14px}.dash-hero h1 em{font-style:italic;color:var(--accent)}.hero-lead{font-size:16.5px;color:var(--muted);max-width:58ch;margin-bottom:22px;line-height:1.65}.hero-meta{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:26px}.hero-actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.hero-note{font-size:12px;color:var(--muted-2);margin-top:12px}.hero-progress{background:color-mix(in srgb,var(--surface) 75%,transparent);border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-align:center;box-shadow:var(--shadow-sm);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.ring-wrap{position:relative;width:138px;height:138px;margin:0 auto 12px}.ring-wrap svg{transform:rotate(-90deg);display:block}.ring-track{stroke:var(--surface-3)}.ring-fill{stroke:url(#ringGrad);stroke-linecap:round;transition:stroke-dashoffset .8s cubic-bezier(.2,.7,.2,1)}.ring-label{position:absolute;inset:0;display:grid;place-content:center;text-align:center}.ring-label strong{font-family:var(--serif);font-size:30px;line-height:1;letter-spacing:-.02em}.ring-label span{display:block;font-size:10.5px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);margin-top:5px}.hero-progress h3{font-size:13px;margin-bottom:3px}.hero-progress p{font-size:12px;color:var(--muted);margin:0 0 12px}.hero-progress .btn{width:100%}.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin:34px 0 16px}.section-head h2{font-family:var(--serif);font-size:28px;font-weight:600;letter-spacing:-.015em}.section-head p{margin:4px 0 0;font-size:13.5px;color:var(--muted)}.section-head .side{font-size:12.5px;color:var(--muted)}.module-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.module-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;text-decoration:none;color:var(--ink);transition:transform .16s,box-shadow .16s,border-color .16s;position:relative;overflow:hidden;min-height:174px}.module-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--line-strong);color:var(--ink)}.module-card:before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--card-accent, var(--accent));opacity:.8}.module-card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.module-num{font-family:var(--serif);font-size:13px;font-weight:700;color:var(--card-accent, var(--accent));background:color-mix(in srgb,var(--card-accent, var(--accent)) 10%,transparent);border-radius:7px;padding:3px 8px;letter-spacing:.04em}.module-card h3{font-size:15px;font-weight:650;line-height:1.3;margin-bottom:6px;letter-spacing:-.005em}.module-card p{font-size:12.5px;color:var(--muted);line-height:1.5;margin:0 0 14px;flex:1}.module-card-foot{display:flex;align-items:center;gap:8px;font-size:11px;color:var(--muted-2)}.module-card-foot .track{flex:1;height:4px;border-radius:99px;background:var(--surface-3);overflow:hidden}.module-card-foot .fill{height:100%;width:0;border-radius:99px;background:var(--card-accent, var(--accent));transition:width .4s}.module-card-foot .pct{font-variant-numeric:tabular-nums;color:var(--muted);font-weight:600}.dash-cols{display:grid;grid-template-columns:1.35fr 1fr;gap:16px;margin-top:16px}.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm)}.panel h3{font-size:15px;margin-bottom:4px}.panel>p{font-size:12.5px;color:var(--muted);margin-bottom:16px}.how-list{list-style:none;padding:0;margin:0;counter-reset:how}.how-list li{display:flex;gap:13px;padding:11px 0;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}.how-list li:first-child{border-top:0;padding-top:0}.how-list li:before{counter-increment:how;content:counter(how);flex:0 0 24px;height:24px;border-radius:50%;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent-ink);font-size:11px;font-weight:700}.how-list b{color:var(--ink);display:block;font-size:13px;margin-bottom:1px}.stat-row{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.stat-box{background:var(--surface-2);border:1px solid var(--line);border-radius:10px;padding:13px 15px}.stat-box strong{display:block;font-family:var(--serif);font-size:23px;line-height:1.1;letter-spacing:-.01em}.stat-box span{font-size:11px;color:var(--muted)}.path-mini{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px}.path-mini a{font-size:11px;color:var(--muted);text-decoration:none;border:1px solid var(--line);border-radius:6px;padding:3px 7px}.path-mini a:hover{color:var(--accent);border-color:var(--accent)}.module-hero{position:relative;border-radius:var(--radius-lg);border:1px solid var(--line);background:radial-gradient(700px 280px at 100% 0%,color-mix(in srgb,var(--mod-accent, var(--accent)) 14%,transparent),transparent 65%),var(--surface);padding:34px 38px 30px;margin-bottom:26px;box-shadow:var(--shadow-sm)}.module-hero .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:11px;letter-spacing:.14em;text-transform:uppercase;font-weight:700;color:var(--mod-accent, var(--accent));margin-bottom:10px}.module-hero h1{font-family:var(--serif);font-size:clamp(30px,3.4vw,42px);font-weight:600;letter-spacing:-.02em;margin-bottom:10px}.module-hero .lead{font-size:16px;color:var(--muted);max-width:74ch;margin-bottom:18px}.module-hero-meta{display:flex;flex-wrap:wrap;gap:8px;align-items:center}.module-hero .hero-progress-mini{margin-left:auto;min-width:170px}.module-hero .hero-progress-mini .bar{height:6px;border-radius:99px;background:var(--surface-3);overflow:hidden;margin-top:6px}.module-hero .hero-progress-mini .bar span{display:block;height:100%;width:0;background:var(--mod-accent, var(--accent));border-radius:99px;transition:width .4s}.module-hero .hero-progress-mini small{font-size:11px;color:var(--muted)}.toc-card{border:1px solid var(--line);background:var(--surface-2);border-radius:var(--radius);padding:18px 20px;margin-bottom:30px}.toc-card h3{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}.toc-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:2px 20px}.toc-grid a{display:flex;gap:9px;align-items:baseline;color:var(--ink-2);text-decoration:none;font-size:13px;padding:5px 0;border-bottom:1px dotted var(--line)}.toc-grid a:hover{color:var(--accent)}.toc-grid .n{font-size:10.5px;color:var(--muted-2);font-variant-numeric:tabular-nums;flex:0 0 26px}.lesson{position:relative;padding:4px 0 36px;margin-bottom:30px;border-bottom:1px solid var(--line);scroll-margin-top:calc(var(--topbar-h) + 22px)}.lesson:last-of-type{border-bottom:0}.lesson-head{display:flex;align-items:flex-start;gap:18px;margin-bottom:18px}.lesson-head-text{flex:1;min-width:0}.lesson-kicker{font-size:10.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--mod-accent, var(--accent));margin-bottom:6px}.lesson h2{font-family:var(--serif);font-size:clamp(25px,2.6vw,33px);font-weight:600;letter-spacing:-.015em;margin:0 0 7px}.lesson-meta{display:flex;flex-wrap:wrap;gap:10px;align-items:center;font-size:11.5px;color:var(--muted-2)}.lesson-meta .sep{width:3px;height:3px;background:currentColor;border-radius:50%}.complete-btn{flex:0 0 auto;display:inline-flex;align-items:center;gap:7px;height:34px;padding:0 12px;border-radius:8px;border:1px solid var(--line-strong);background:var(--surface);font-size:12px;font-weight:600;color:var(--muted);transition:all .15s;white-space:nowrap}.complete-btn:hover{border-color:var(--success);color:var(--success)}.complete-btn .box{width:16px;height:16px;border:1.5px solid currentColor;border-radius:5px;display:grid;place-items:center;font-size:10px;line-height:1}.complete-btn.is-done{background:var(--success-soft);border-color:color-mix(in srgb,var(--success) 45%,transparent);color:var(--success)}.complete-btn.is-done .box{background:var(--success);border-color:var(--success);color:#fff}.prose{font-size:var(--prose-size);line-height:1.75;color:var(--ink-2);max-width:var(--prose-width)}.prose>:first-child{margin-top:0}.prose h3{font-family:var(--sans);font-size:19px;font-weight:700;color:var(--ink);margin:34px 0 10px;letter-spacing:-.01em;scroll-margin-top:calc(var(--topbar-h) + 20px)}.prose h4{font-size:15.5px;font-weight:650;color:var(--ink);margin:24px 0 7px}.prose strong{color:var(--ink);font-weight:650}.prose em{font-style:italic}.prose code:not([class*=language-]){font-family:var(--mono);font-size:.84em;background:var(--surface-3);border:1px solid var(--line);padding:1px 5px;border-radius:5px;color:var(--ink)}.prose blockquote{margin:22px 0;padding:14px 20px;border-left:3px solid var(--accent-2);background:var(--accent-2-soft);border-radius:0 10px 10px 0;color:var(--ink-2);font-size:15px}.prose blockquote p:last-child{margin-bottom:0}.prose ul li::marker{color:var(--muted-2)}.prose .lead{font-size:18.5px;line-height:1.7;color:var(--ink-2)}.callout{position:relative;margin:22px 0;padding:16px 18px 15px 44px;border:1px solid var(--line);border-radius:11px;background:var(--surface-2);font-size:14.5px;line-height:1.65;color:var(--ink-2)}.callout:before{position:absolute;left:15px;top:15px;width:20px;height:20px;border-radius:6px;display:grid;place-items:center;font-size:11px;font-weight:800;background:var(--surface-3);color:var(--muted)}.callout>:last-child{margin-bottom:0}.callout .callout-title{display:block;font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;margin-bottom:4px;color:var(--muted)}.callout.tip{background:var(--accent-2-soft);border-color:color-mix(in srgb,var(--accent-2) 24%,transparent)}.callout.tip:before{content:"✓";background:var(--accent-2);color:#fff}.callout.tip .callout-title{color:var(--accent-2)}.callout.info{background:var(--accent-soft);border-color:color-mix(in srgb,var(--accent) 22%,transparent)}.callout.info:before{content:"i";background:var(--accent);color:#fff;font-family:var(--serif);font-style:italic}.callout.info .callout-title{color:var(--accent-ink)}.callout.warn{background:var(--gold-soft);border-color:color-mix(in srgb,var(--gold) 26%,transparent)}.callout.warn:before{content:"!";background:var(--gold);color:#fff}.callout.warn .callout-title{color:var(--gold)}.callout.math{background:var(--violet-soft);border-color:color-mix(in srgb,var(--violet) 20%,transparent)}.callout.math:before{content:"∑";background:var(--violet);color:#fff;font-family:var(--serif)}.callout.math .callout-title{color:var(--violet)}.callout.history{background:var(--surface-2);border-style:dashed}.callout.history:before{content:"◷";background:var(--surface-3);color:var(--gold)}.callout.history .callout-title{color:var(--gold)}.callout.code-note:before{content:"⌨"}.formula{margin:22px 0;padding:16px 20px;background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--violet);border-radius:0 10px 10px 0;overflow-x:auto;text-align:center;color:var(--ink)}.formula math{font-size:1.06em}.formula .formula-caption{display:block;text-align:left;font-size:11.5px;color:var(--muted);margin-top:8px}.formula-label{display:block;text-align:left;font-size:10.5px;letter-spacing:.09em;text-transform:uppercase;color:var(--violet);font-weight:700;margin-bottom:6px}.math-inline{white-space:nowrap}.example{margin:26px 0;border:1px solid var(--line);border-radius:12px;background:var(--surface);overflow:hidden;box-shadow:var(--shadow-sm)}.example-head{display:flex;align-items:center;gap:10px;padding:11px 18px;background:linear-gradient(90deg,var(--gold-soft),transparent);border-bottom:1px solid var(--line);font-size:11.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--gold)}.example-head .badge-num{width:21px;height:21px;border-radius:6px;background:var(--gold);color:#fff;display:grid;place-items:center;font-size:11px}.example-body{padding:17px 20px 15px;font-size:15px;line-height:1.7;color:var(--ink-2)}.example-body>:last-child{margin-bottom:0}.example .step{display:grid;grid-template-columns:26px 1fr;gap:10px;padding:7px 0;border-top:1px dashed var(--line)}.example .step:first-child{border-top:0}.example .step-n{width:22px;height:22px;border-radius:50%;display:grid;place-items:center;background:var(--surface-3);font-size:10.5px;font-weight:700;color:var(--muted);margin-top:3px}.code-block{position:relative;margin:22px 0;border-radius:11px;overflow:hidden;border:1px solid var(--line);background:#151c26}.code-head{display:flex;align-items:center;gap:8px;height:38px;padding:0 12px 0 15px;background:#10161f;border-bottom:1px solid #29323f;color:#9fb0c5;font-family:var(--mono);font-size:11px}.code-head .lang{color:#7d9bff;text-transform:uppercase;font-weight:600;letter-spacing:.06em}.code-head .file{color:#6e7f93}.code-block pre{margin:0;padding:16px 18px;overflow-x:auto;background:#151c26!important;font-family:var(--mono)!important;font-size:12.8px!important;line-height:1.62!important;tab-size:4}.code-block code{font-family:var(--mono)!important;text-shadow:none!important;color:#d8e2ef}.copy-btn{position:absolute;top:6px;right:7px;height:26px;padding:0 8px;border-radius:5px;border:1px solid #344050;background:#1d2733;color:#9fb0c5;font-size:10.5px;font-family:var(--sans);font-weight:600;display:inline-flex;align-items:center;gap:4px;opacity:0;transition:opacity .15s,background .15s}.code-block:hover .copy-btn,.copy-btn:focus{opacity:1}.copy-btn:hover{background:#29384a;color:#fff}.copy-btn.copied{background:#14532d;border-color:#1c7a43;color:#7ee2a8}.code-block .line-note{color:#6e7f93}.token.comment,.token.prolog,.token.doctype,.token.cdata{color:#7c8ea3;font-style:italic}.token.punctuation{color:#9fb0c5}.token.namespace{opacity:.8}.token.property,.token.tag,.token.boolean,.token.number,.token.constant,.token.symbol{color:#f0b37e}.token.selector,.token.attr-name,.token.string,.token.char,.token.builtin,.token.inserted{color:#9adba0}.token.operator,.token.entity,.token.url,.language-css .token.string,.style .token.string{color:#89c4f4}.token.atrule,.token.attr-value,.token.keyword{color:#8fa8ff}.token.function,.token.class-name{color:#f2cf7a}.token.regex,.token.important,.token.variable{color:#e58ea8}.token.important,.token.bold{font-weight:700}.token.italic{font-style:italic}.table-wrap{margin:22px 0;overflow-x:auto;border:1px solid var(--line);border-radius:11px;background:var(--surface)}table.data{width:100%;border-collapse:collapse;font-size:13.5px}table.data th{text-align:left;font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:700;padding:10px 14px;background:var(--surface-2);border-bottom:1px solid var(--line);white-space:nowrap}table.data td{padding:10px 14px;border-bottom:1px solid var(--line);vertical-align:top;color:var(--ink-2)}table.data tr:last-child td{border-bottom:0}table.data tbody tr:hover{background:color-mix(in srgb,var(--accent) 3%,transparent)}table.data td.num,table.data th.num{text-align:right;font-variant-numeric:tabular-nums}table.data .good{color:var(--success);font-weight:600}table.data .bad{color:var(--danger);font-weight:600}.def-list{display:grid;gap:8px;margin:18px 0}.def-item{display:grid;grid-template-columns:170px 1fr;gap:14px;padding:9px 0;border-top:1px solid var(--line);font-size:14px}.def-item:first-child{border-top:0}.def-item dt{font-weight:650;color:var(--ink)}.def-item dd{margin:0;color:var(--muted)}.exercise{margin:20px 0;border:1px solid var(--line);border-radius:11px;background:var(--surface-2);overflow:hidden}.exercise summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:10px;padding:13px 17px;font-size:13.5px;font-weight:600;color:var(--ink);-webkit-user-select:none;user-select:none}.exercise summary::-webkit-details-marker{display:none}.exercise summary:before{content:"✎";width:24px;height:24px;border-radius:6px;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent);font-size:12px;flex:0 0 24px}.exercise summary:after{content:"Ver solución";margin-left:auto;font-size:10.5px;color:var(--muted-2);font-weight:500}.exercise[open] summary:after{content:"Ocultar"}.exercise[open] summary{border-bottom:1px solid var(--line)}.exercise .answer{padding:14px 18px 16px;font-size:14px;color:var(--ink-2);line-height:1.7;background:var(--surface)}.exercise .answer>:last-child{margin-bottom:0}.exercise .answer:before{content:"Solución";display:block;font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--accent-2);font-weight:700;margin-bottom:6px}.objectives{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 22px;margin:18px 0 24px;padding:16px 18px;background:var(--surface-2);border:1px solid var(--line);border-radius:11px}.objectives h4{grid-column:1 / -1;margin:0 0 2px;font-size:11px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted)}.objectives div{position:relative;padding-left:18px;font-size:13px;color:var(--muted)}.objectives div:before{content:"→";position:absolute;left:0;color:var(--accent);font-size:12px}.figure{margin:26px 0}.figure-frame{border:1px solid var(--line);border-radius:12px;background:var(--surface);padding:18px;overflow:hidden}.figure figcaption{font-size:11.5px;color:var(--muted);margin-top:8px;text-align:center;line-height:1.5}.svg-diagram{width:100%;height:auto;display:block}.diagram-text{font-family:var(--sans)}.timeline{position:relative;margin:24px 0;padding-left:26px}.timeline:before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:var(--line)}.tl-item{position:relative;padding:0 0 20px}.tl-item:before{content:"";position:absolute;left:-24px;top:6px;width:10px;height:10px;border-radius:50%;background:var(--surface);border:2px solid var(--accent)}.tl-item .year{font-family:var(--serif);font-size:14px;font-weight:700;color:var(--accent)}.tl-item h4{margin:1px 0 3px;font-size:14px}.tl-item p{margin:0;font-size:13.5px;color:var(--muted)}.metric-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:20px 0}.metric{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:12px 14px}.metric .k{font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:600}.metric .v{font-family:var(--serif);font-size:22px;line-height:1.2;margin-top:2px}.metric .s{font-size:10.5px;color:var(--muted-2)}.algo-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:20px 0}.algo-card{border:1px solid var(--line);border-radius:11px;padding:15px 16px;background:var(--surface)}.algo-card h4{margin:0 0 4px;font-size:14px}.algo-card p{margin:0;font-size:12.5px;color:var(--muted);line-height:1.55}.algo-card .tag{font-size:10px;color:var(--accent);font-weight:700;text-transform:uppercase;letter-spacing:.07em}.sim{margin:28px 0;border:1px solid var(--line);border-radius:14px;background:var(--surface);overflow:hidden;box-shadow:var(--shadow-sm)}.sim-head{display:flex;align-items:flex-start;gap:12px;padding:14px 18px;border-bottom:1px solid var(--line);background:linear-gradient(90deg,color-mix(in srgb,var(--accent) 5%,var(--surface)),var(--surface))}.sim-head .sim-icon{flex:0 0 30px;height:30px;border-radius:8px;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent);font-size:14px}.sim-head h4{font-size:14px;margin:0 0 2px}.sim-head p{font-size:11.5px;color:var(--muted);margin:0}.sim-body{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:0}.sim-canvas-wrap{position:relative;padding:14px;min-width:0;display:flex;align-items:center;justify-content:center;background:var(--surface-2)}.sim-canvas-wrap canvas{display:block;width:100%;max-width:560px;height:auto;border-radius:9px;border:1px solid var(--line);background:var(--surface);touch-action:none;cursor:crosshair}.sim-controls{border-left:1px solid var(--line);padding:14px 16px}.sim-controls .ctrl{margin-bottom:12px}.sim-controls label{display:flex;justify-content:space-between;align-items:baseline;font-size:11px;font-weight:600;color:var(--muted);margin-bottom:4px;gap:8px}.sim-controls label output{color:var(--ink);font-variant-numeric:tabular-nums;font-weight:700;font-size:11.5px}.sim-controls input[type=range]{width:100%;accent-color:var(--accent);height:18px}.sim-controls select,.sim-controls input[type=number],.sim-controls input[type=text]{width:100%;height:32px;border:1px solid var(--line);border-radius:7px;background:var(--surface);padding:0 8px;font-size:12px;color:var(--ink)}.sim-controls input[type=number]{font-variant-numeric:tabular-nums}.sim-controls .btn-row{display:flex;gap:6px;margin-top:10px;flex-wrap:wrap}.sim-controls .btn-row .btn{flex:1}.sim-readout{margin-top:10px;padding:10px 0 0;border-top:1px solid var(--line);font-size:11.5px;color:var(--muted);line-height:1.8}.sim-readout b{color:var(--ink);font-variant-numeric:tabular-nums}.sim-readout .bad{color:var(--danger)}.sim-readout .ok{color:var(--success)}.sim-hint{font-size:10.5px;color:var(--muted-2);margin-top:8px;line-height:1.5}.sim-legend{display:flex;flex-wrap:wrap;gap:10px;font-size:10.5px;color:var(--muted);margin-top:8px}.sim-legend span{display:inline-flex;align-items:center;gap:4px}.sim-legend i{width:9px;height:9px;border-radius:50%;display:inline-block}.quiz{margin:34px 0 12px;border:1px solid var(--line);background:var(--surface);border-radius:14px;overflow:hidden;box-shadow:var(--shadow-sm)}.quiz-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:16px 20px;border-bottom:1px solid var(--line);background:linear-gradient(90deg,var(--accent-soft),transparent)}.quiz-head .qicon{width:32px;height:32px;border-radius:9px;background:var(--accent);color:#fff;display:grid;place-items:center;font-weight:700;font-size:14px}.quiz-head h3{font-size:15px;margin:0}.quiz-head p{font-size:11.5px;color:var(--muted);margin:1px 0 0}.quiz-score{margin-left:auto;font-size:12px;color:var(--muted);text-align:right}.quiz-score b{color:var(--ink);font-size:15px;font-variant-numeric:tabular-nums}.quiz-body{padding:8px 20px 20px}.q-item{padding:18px 0;border-bottom:1px solid var(--line)}.q-item:last-child{border-bottom:0;padding-bottom:4px}.q-text{font-size:14.5px;font-weight:600;color:var(--ink);margin-bottom:10px;display:flex;gap:9px;line-height:1.5}.q-text .qn{flex:0 0 22px;height:22px;border-radius:6px;background:var(--surface-3);display:grid;place-items:center;font-size:10.5px;color:var(--muted);font-weight:700;margin-top:1px}.q-options{display:grid;gap:6px}.q-opt{display:flex;align-items:flex-start;gap:9px;text-align:left;padding:9px 12px;border:1px solid var(--line);border-radius:8px;background:var(--surface-2);font-size:13.5px;color:var(--ink-2);line-height:1.5;transition:border-color .12s,background .12s}.q-opt:hover:not(:disabled){border-color:var(--accent);background:var(--accent-soft)}.q-opt .letter{flex:0 0 20px;height:20px;border-radius:5px;border:1px solid var(--line-strong);display:grid;place-items:center;font-size:10px;font-weight:700;color:var(--muted);background:var(--surface)}.q-opt.correct{border-color:var(--success);background:var(--success-soft);color:var(--ink)}.q-opt.correct .letter{background:var(--success);border-color:var(--success);color:#fff}.q-opt.wrong{border-color:var(--danger);background:var(--danger-soft);color:var(--ink)}.q-opt.wrong .letter{background:var(--danger);border-color:var(--danger);color:#fff}.q-opt:disabled{cursor:default;opacity:1}.q-opt.dim{opacity:.55}.q-feedback{display:none;margin-top:9px;padding:9px 12px;border-radius:8px;font-size:12.5px;line-height:1.6;background:var(--surface-3);color:var(--ink-2);border-left:3px solid var(--muted-2)}.q-feedback.show{display:block}.q-feedback.ok{background:var(--success-soft);border-left-color:var(--success)}.q-feedback.no{background:var(--danger-soft);border-left-color:var(--danger)}.q-feedback b{color:var(--ink)}.quiz-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 20px;border-top:1px solid var(--line);background:var(--surface-2);font-size:11.5px;color:var(--muted);flex-wrap:wrap}.quiz-progress{height:4px;background:var(--surface-3);border-radius:99px;flex:1;min-width:100px;overflow:hidden}.quiz-progress span{display:block;height:100%;width:0;background:var(--accent);transition:width .3s}.modal{position:fixed;inset:0;z-index:120;display:none;align-items:flex-start;justify-content:center;padding:8vh 18px 30px;background:#080d148c;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);overflow-y:auto}.modal.open{display:flex;animation:fadeIn .18s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.modal-panel{width:100%;max-width:640px;background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow-lg);overflow:hidden;animation:modalUp .22s ease}.modal-panel.wide{max-width:820px}@keyframes modalUp{0%{transform:translateY(14px);opacity:0}to{transform:none;opacity:1}}.modal-head{display:flex;align-items:center;gap:12px;padding:16px 20px;border-bottom:1px solid var(--line)}.modal-head h2{font-size:16px;margin:0;flex:1}.modal-head .x{width:32px;height:32px;border-radius:8px;display:grid;place-items:center;color:var(--muted);font-size:18px}.modal-head .x:hover{background:var(--surface-3);color:var(--ink)}.modal-body{padding:18px 20px 22px;max-height:70vh;overflow-y:auto}.modal-search{padding:12px 16px;border-bottom:1px solid var(--line);display:flex;gap:10px;align-items:center;background:var(--surface-2)}.modal-search input{flex:1;height:42px;border:1px solid var(--line);border-radius:9px;background:var(--surface);padding:0 12px;font-size:14.5px;color:var(--ink)}.modal-search input:focus{outline:2px solid var(--accent);outline-offset:0;border-color:var(--accent)}.search-results{padding:8px;min-height:140px}.sr-item{display:block;padding:10px 12px;border-radius:9px;text-decoration:none;color:var(--ink)}.sr-item:hover,.sr-item.sel{background:var(--accent-soft);color:var(--ink)}.sr-item .sr-mod{font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:var(--accent);font-weight:700}.sr-item h4{font-size:13.5px;margin:1px 0 2px}.sr-item p{font-size:11.5px;color:var(--muted);margin:0;line-height:1.5}.sr-item mark{background:var(--gold-soft);color:var(--gold);border-radius:2px;padding:0 1px}.search-empty{padding:34px 20px;text-align:center;color:var(--muted);font-size:13px}.search-hint{padding:0 8px 8px;font-size:10.5px;color:var(--muted-2)}.gl-search{margin-bottom:12px}.gl-search input{width:100%;height:38px;border:1px solid var(--line);border-radius:8px;background:var(--surface-2);padding:0 12px;font-size:13px}.gl-list{display:grid;gap:0}.gl-item{padding:10px 2px;border-bottom:1px solid var(--line)}.gl-item:last-child{border-bottom:0}.gl-item dt{font-weight:650;font-size:13.5px;color:var(--ink);display:flex;gap:8px;align-items:baseline}.gl-item dt .gl-cat{font-size:9px;text-transform:uppercase;letter-spacing:.07em;color:var(--muted-2);font-weight:600}.gl-item dd{margin:3px 0 0;font-size:12.5px;color:var(--muted);line-height:1.6}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:20px}.stat-card{border:1px solid var(--line);border-radius:11px;padding:13px 15px;background:var(--surface-2)}.stat-card .v{font-family:var(--serif);font-size:26px;line-height:1.1}.stat-card .k{font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-top:3px}.stat-card .s{font-size:10px;color:var(--muted-2);margin-top:2px}.mod-progress-list{display:grid;gap:7px}.mod-progress-row{display:grid;grid-template-columns:96px 1fr 44px;gap:10px;align-items:center;font-size:11.5px;color:var(--muted)}.mod-progress-row .tr{height:5px;background:var(--surface-3);border-radius:99px;overflow:hidden}.mod-progress-row .fl{height:100%;background:var(--accent);border-radius:99px}.mod-progress-row .pc{text-align:right;font-variant-numeric:tabular-nums}.danger-zone{margin-top:24px;padding-top:16px;border-top:1px dashed var(--line)}.danger-zone h4{font-size:12px;color:var(--danger);margin-bottom:4px}.danger-zone p{font-size:11.5px;color:var(--muted);margin-bottom:10px}.exam-hero{border-radius:var(--radius-lg);border:1px solid var(--line);background:var(--surface);padding:34px 38px;margin-bottom:24px;box-shadow:var(--shadow-sm)}.exam-hero h1{font-family:var(--serif);font-size:clamp(30px,3vw,40px);font-weight:600;margin-bottom:8px}.exam-hero p{color:var(--muted);max-width:70ch;margin-bottom:16px}.exam-shell{max-width:900px}.exam-q{border:1px solid var(--line);border-radius:12px;background:var(--surface);padding:18px 20px;margin-bottom:10px}.exam-q .q-text{margin-bottom:10px}.exam-nav{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:18px}.exam-result{border:1px solid var(--line);border-radius:14px;background:var(--surface);padding:28px;text-align:center;margin-bottom:22px}.exam-result .score-big{font-family:var(--serif);font-size:64px;line-height:1;margin:6px 0;letter-spacing:-.03em}.exam-result .pct-label{font-size:12px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted)}.exam-result p{color:var(--muted);font-size:13.5px;margin:8px auto 0;max-width:55ch}.exam-breakdown{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:18px;text-align:left}.exam-breakdown div{background:var(--surface-2);border:1px solid var(--line);border-radius:8px;padding:8px 10px;font-size:11px;color:var(--muted)}.exam-breakdown b{display:block;color:var(--ink);font-size:13px}.exam-answered{font-size:11.5px;color:var(--muted)}.toast{position:fixed;left:50%;bottom:26px;transform:translate(-50%) translateY(20px);z-index:200;background:var(--ink);color:var(--bg);padding:10px 18px;border-radius:10px;font-size:13px;font-weight:500;box-shadow:var(--shadow-lg);opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;max-width:90vw;text-align:center}.toast.show{opacity:1;transform:translate(-50%) translateY(0)}.biblio-section{margin:26px 0 34px}.biblio-section h2{font-family:var(--serif);font-size:26px;margin-bottom:4px}.biblio-section>p{color:var(--muted);font-size:13px;margin-bottom:14px}.ref-list{list-style:none;padding:0;margin:0;display:grid;gap:8px}.ref{display:grid;grid-template-columns:46px 1fr;gap:12px;padding:12px 14px;border:1px solid var(--line);border-radius:9px;background:var(--surface);font-size:13px;line-height:1.55;color:var(--muted)}.ref .tag{font-size:9px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--accent);background:var(--accent-soft);border-radius:5px;padding:2px 5px;height:fit-content;text-align:center}.ref b{color:var(--ink);font-weight:600}.ref a{word-break:break-word}.ref .why{display:block;font-size:11.5px;color:var(--muted-2);margin-top:2px}.mt0{margin-top:0!important}.mb0{margin-bottom:0!important}.muted{color:var(--muted)}.small{font-size:12.5px}.center{text-align:center}.nowrap{white-space:nowrap}.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.stack{display:grid;gap:12px}.inline-code{font-family:var(--mono);font-size:.88em;background:var(--surface-3);border:1px solid var(--line);padding:1px 5px;border-radius:5px}.hr-soft{border:0;border-top:1px solid var(--line);margin:26px 0}.badge-status{font-size:9.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;padding:2px 6px;border-radius:4px}.badge-status.ready{background:var(--success-soft);color:var(--success)}.badge-status.advanced{background:var(--violet-soft);color:var(--violet)}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:18px}.two-col>div>h4:first-child{margin-top:0}.sim-body.compact{grid-template-columns:minmax(0,1fr)}.sim-body.compact .sim-controls{border-left:0;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px 16px;align-items:end}.sim-body.compact .sim-controls .ctrl{margin-bottom:0}.sim-body.compact .sim-readout{grid-column:1 / -1;border-top:1px solid var(--line);margin-top:2px;padding-top:10px;display:flex;flex-wrap:wrap;gap:6px 20px}.sim-body.compact .sim-readout span{display:inline-flex;gap:5px}.sim-body.compact .btn-row{margin-top:0}.sim-body.compact .sim-hint{grid-column:1 / -1;margin-top:0}.confusion-grid{display:grid;grid-template-columns:90px 1fr 1fr;gap:6px;margin:14px 0;font-size:11px;text-align:center}.confusion-grid .head{font-weight:700;color:var(--muted);display:grid;place-items:center;font-size:10px;text-transform:uppercase;letter-spacing:.05em}.confusion-grid .cell{border-radius:8px;padding:12px 8px;border:1px solid var(--line);display:grid;gap:2px;place-content:center}.confusion-grid .cell b{font-size:19px;font-family:var(--serif)}.confusion-grid .cell span{font-size:9.5px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}.confusion-grid .cell.tp{background:var(--success-soft);border-color:color-mix(in srgb,var(--success) 30%,transparent)}.confusion-grid .cell.tn{background:var(--accent-soft);border-color:color-mix(in srgb,var(--accent) 26%,transparent)}.confusion-grid .cell.fp,.confusion-grid .cell.fn{background:var(--danger-soft);border-color:color-mix(in srgb,var(--danger) 24%,transparent)}.nn-legend{font-size:10px;color:var(--muted);text-align:center;margin-top:6px}.chart-wrap{position:relative;width:100%;height:300px;margin:16px 0}.chart-wrap.tall{height:340px}.chart-wrap canvas{width:100%!important;height:100%!important}.chart-card{border:1px solid var(--line);border-radius:12px;background:var(--surface);padding:16px 16px 8px;margin:22px 0}.chart-card h4{font-size:13px;margin-bottom:2px}.chart-card p{font-size:11px;color:var(--muted);margin:0}.venn{display:grid;place-items:center;padding:10px 0 4px}.venn svg{max-width:520px;width:100%;height:auto}.venn text{font-family:var(--sans)}.project{border:1px solid var(--line);border-radius:14px;background:var(--surface);margin:30px 0;overflow:hidden;box-shadow:var(--shadow-sm)}.project-head{padding:20px 24px 16px;border-bottom:1px solid var(--line);background:linear-gradient(100deg,color-mix(in srgb,var(--proj-accent, var(--accent)) 7%,var(--surface)),var(--surface))}.project-head .pnum{font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;font-weight:700;color:var(--proj-accent, var(--accent))}.project-head h3{font-family:var(--serif);font-size:24px;margin:2px 0 6px;font-weight:600}.project-head p{font-size:13px;color:var(--muted);margin:0;max-width:75ch}.project-meta{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}.project-body{padding:20px 24px 22px}.project-body .prose{font-size:15px;max-width:none}.project-body h4{font-size:12px;text-transform:uppercase;letter-spacing:.09em;color:var(--muted);margin:20px 0 7px}.project-body h4:first-child{margin-top:0}.proj-steps{list-style:none;counter-reset:ps;padding:0;margin:0 0 12px;display:grid;gap:4px}.proj-steps li{counter-increment:ps;position:relative;padding-left:28px;font-size:13.5px;color:var(--ink-2)}.proj-steps li:before{content:counter(ps);position:absolute;left:0;top:1px;width:19px;height:19px;border-radius:50%;background:var(--surface-3);display:grid;place-items:center;font-size:9.5px;font-weight:700;color:var(--muted)}.proj-result{border-left:3px solid var(--accent-2);background:var(--accent-2-soft);padding:11px 14px;border-radius:0 8px 8px 0;font-size:12.5px;color:var(--ink-2)}.checklist{list-style:none;padding:0;margin:14px 0;display:grid;gap:5px}.checklist li{position:relative;padding-left:24px;font-size:13.5px;color:var(--ink-2)}.checklist li:before{content:"□";position:absolute;left:2px;color:var(--muted-2);font-size:14px}@media(max-width:1180px){:root{--sidebar-w: 274px}.module-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.main{padding:30px 32px 80px}.site-footer{padding:20px 32px 26px}.dash-hero{padding:34px 32px}.hero-grid{grid-template-columns:minmax(0,1fr) 240px;gap:24px}.hero-progress{padding:18px}.ring-wrap{width:118px;height:118px}.ring-wrap svg{width:118px;height:118px}}@media(max-width:980px){.sidebar{transform:translate(-100%);box-shadow:none}.sidebar.open{transform:none;box-shadow:0 0 60px #00000080}.workspace{margin-left:0}.menu-btn{display:inline-grid}.dash-cols{grid-template-columns:1fr}.topbar{padding:0 18px}.search-trigger{min-width:0;width:38px;padding:0;justify-content:center;border-color:transparent;background:transparent}.search-trigger .label,.search-trigger .kbd{display:none}.search-trigger:hover{background:var(--surface);border-color:var(--line)}.hero-grid{grid-template-columns:1fr}.hero-progress{display:grid;grid-template-columns:110px 1fr;align-items:center;text-align:left;gap:16px}.ring-wrap{width:104px;height:104px;margin:0}.ring-wrap svg{width:104px;height:104px}.ring-label strong{font-size:24px}.hero-progress .btn{width:auto}.sim-body{grid-template-columns:1fr}.sim-controls{border-left:0;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px 14px;align-items:end}.sim-controls .ctrl,.sim-controls .btn-row{margin:0}.sim-readout{grid-column:1 / -1}}@media(max-width:760px){.main{padding:22px 18px 64px}.site-footer{padding:18px 18px 24px;font-size:11.5px}.topbar{height:58px;gap:8px}.topbar-actions{gap:2px}.topbar .chip-btn .txt{display:none}.topbar .chip-btn{width:38px;padding:0;justify-content:center}.progress-pill{display:none}.crumbs{font-size:12px}.dash-hero{padding:26px 22px;border-radius:16px}.dash-hero h1{font-size:34px}.hero-lead{font-size:15px}.hero-progress{grid-template-columns:92px 1fr}.ring-wrap,.ring-wrap svg{width:88px;height:88px}.module-grid{grid-template-columns:1fr}.module-card{min-height:0}.section-head{flex-direction:column;align-items:flex-start;gap:4px;margin-top:28px}.section-head h2{font-size:24px}.module-hero{padding:24px 20px 22px;border-radius:16px}.module-hero h1{font-size:29px}.module-hero .hero-progress-mini{margin-left:0;width:100%;margin-top:6px}.toc-grid{grid-template-columns:1fr}.lesson h2{font-size:25px}.lesson-head{gap:10px;flex-direction:column}.complete-btn{align-self:flex-start}.prose{font-size:16px}.objectives,.two-col,.grid-2,.grid-3,.algo-grid{grid-template-columns:1fr}.metric-row,.stats-grid{grid-template-columns:repeat(2,1fr)}.exam-breakdown{grid-template-columns:1fr}.def-item{grid-template-columns:1fr;gap:1px}.sim-canvas-wrap{padding:8px}.sim-head{padding:12px 14px}.modal{padding:4vh 10px 20px}.modal-body{padding:16px;max-height:78vh}.quiz-body{padding:6px 14px 16px}.quiz-head{padding:14px}.quiz-score{margin-left:0;width:100%;text-align:left}.example-body,.example-head{padding-left:14px;padding-right:14px}.formula{padding:13px 12px}.table-wrap{font-size:12px}.project-head,.project-body{padding-left:16px;padding-right:16px}.callout{padding:14px 14px 12px 40px}.callout:before{left:12px;top:13px}.chart-wrap{height:250px}.veil,.topbar-actions .hide-xs{display:none}}@media(max-width:420px){.dash-hero h1{font-size:30px}.hero-actions .btn,.hero-actions{width:100%}.metric-row{grid-template-columns:1fr}.quiz-foot{flex-direction:column;align-items:stretch}.exam-hero{padding:24px 20px}}@media print{.sidebar,.topbar,.scrim,.modal,.toast,.site-footer,.complete-btn,.copy-btn,.sim-controls,.quiz-foot,.hero-actions,.search-trigger,.menu-btn,.toc-card{display:none!important}.workspace{margin-left:0}.main{padding:0;max-width:none}.view{display:none!important}.view.active{display:block!important}.lesson{break-inside:avoid-page;border-bottom:1px solid #ccc}.code-block{border:1px solid #ccc}.code-block pre{white-space:pre-wrap;background:#f5f5f5!important;color:#111}.code-block code{color:#111}body{background:#fff;color:#000;font-size:11pt}.prose{max-width:none;font-size:10.5pt}.module-hero{border:1px solid #ddd;box-shadow:none}.sim,.example,.callout,.quiz{break-inside:avoid}a{color:#000;text-decoration:none}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}