:root{--paper: #f5efe3;--paper-2: #ede4d3;--card: #fbf8f1;--card-2: #f3ecdf;--ink: #2a2723;--ink-2: #57524a;--ink-3: #8a8373;--line: #e0d5c1;--line-2: #cfc2aa;--moss: #4c7a45;--moss-2: #78a468;--leaf: #a8c98c;--moss-soft: #e3ecd6;--terracotta: #c4663f;--clay: #e3a47c;--terracotta-soft: #f5e0d2;--sky: #4f7fa6;--sky-soft: #dde8f0;--sun: #d99a2b;--sun-soft: #f7e8c6;--plum: #875a86;--plum-soft: #eee0ec;--teal: #3b8581;--teal-soft: #d9ece8;--rose: #c25467;--rose-soft: #f4dde1;--code-bg: #efe7d7;--code-ink: #3a352d;--hl-key: #a2472a;--hl-str: #4c7a45;--hl-num: #7a4e9c;--hl-com: #948b77;--hl-fn: #2f6a93;--hl-self: #b0632f;--shadow: 0 1px 2px rgb(60 45 20 / .06), 0 8px 24px -12px rgb(60 45 20 / .22);--shadow-lg: 0 2px 6px rgb(60 45 20 / .06), 0 24px 48px -24px rgb(60 45 20 / .35);--radius: 18px;--radius-sm: 11px;--f-display: "Lora", "Iowan Old Style", Georgia, serif;--f-text: "Source Serif 4", "Iowan Old Style", Georgia, serif;--f-ui: "Manrope", system-ui, -apple-system, "Segoe UI", sans-serif;--f-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;--col: 680px;--wide: 1040px;--top-h: 56px;--accent: var(--moss);--accent-soft: var(--moss-soft);--on-accent: #fffdf7}@media (prefers-color-scheme: dark){:root{--paper: #1c1a16;--paper-2: #23201b;--card: #26231d;--card-2: #2d2922;--ink: #efe6d6;--ink-2: #c3b9a6;--ink-3: #8f8674;--line: #3a352c;--line-2: #4b443a;--moss: #8cbf7c;--moss-2: #6f9e62;--leaf: #9cc783;--moss-soft: #2c3727;--terracotta: #e38a62;--clay: #c98a64;--terracotta-soft: #3d2c23;--sky: #86b1d4;--sky-soft: #22303b;--sun: #e7b453;--sun-soft: #3a3020;--plum: #c396c1;--plum-soft: #352834;--teal: #74bdb6;--teal-soft: #1f3432;--rose: #e48a99;--rose-soft: #3b262a;--code-bg: #221f1a;--code-ink: #e6dcc9;--hl-key: #ef9a73;--hl-str: #a4cf8f;--hl-num: #c9a2e6;--hl-com: #857c69;--hl-fn: #8fc0e6;--hl-self: #e0a36b;--shadow: 0 1px 2px rgb(0 0 0 / .3), 0 8px 24px -12px rgb(0 0 0 / .6);--shadow-lg: 0 2px 6px rgb(0 0 0 / .3), 0 24px 48px -24px rgb(0 0 0 / .7);--on-accent: #1c1a16}}body.sp-body{background:var(--paper);color:var(--ink);margin:0}.sp{min-height:100svh;font-family:var(--f-text);font-size:18px;line-height:1.62;color:var(--ink);background:radial-gradient(1200px 600px at 85% -10%,color-mix(in srgb,var(--leaf) 16%,transparent),transparent 70%),radial-gradient(900px 500px at -10% 30%,color-mix(in srgb,var(--clay) 10%,transparent),transparent 70%),var(--paper);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:clip;font-variant-ligatures:no-contextual}.sp *,.sp *:before,.sp *:after{box-sizing:border-box}.sp h1,.sp h2,.sp h3,.sp h4{text-align:left;color:inherit}.sp p,.sp ul,.sp ol,.sp figure,.sp blockquote{margin-top:0}.sp button{line-height:1.2}.sp dialog{color:var(--ink)}.sp code,.sp pre,.sp kbd,.sp a{color:inherit}.sp :focus-visible{outline:2.5px solid var(--accent);outline-offset:2px;border-radius:6px}.sp ::selection{background:color-mix(in srgb,var(--accent) 28%,transparent)}.sp-eyebrow{font-family:var(--f-ui);font-size:13px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--accent);margin:0 0 12px;display:flex;gap:8px;flex-wrap:wrap}.sp-btn,.sp button.sp-btn{font-family:var(--f-ui);font-size:15px;font-weight:700;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:42px;padding:9px 18px;border-radius:999px;border:1.5px solid var(--line-2);background:var(--card);color:var(--ink);text-decoration:none;cursor:pointer;transition:transform .15s,background .15s,border-color .15s,box-shadow .15s;-webkit-tap-highlight-color:transparent;white-space:nowrap}.sp-btn:hover{border-color:var(--accent)}.sp-btn:active{transform:scale(.97)}.sp-btn[disabled]{opacity:.45;cursor:default;transform:none}.sp-btn--primary,.sp button.sp-btn--primary{background:var(--accent);border-color:var(--accent);color:var(--on-accent);box-shadow:var(--shadow)}.sp-btn--primary:hover,.sp button.sp-btn--primary:hover{background:color-mix(in srgb,var(--accent) 88%,black)}.sp-btn--small{min-height:34px;padding:5px 13px;font-size:13.5px}.sp-btn--ghost,.sp button.sp-btn--ghost{background:transparent;border-color:transparent}.sp-btn--ghost:hover{background:var(--card-2);border-color:transparent}.sp-chip{font-family:var(--f-ui);font-size:13.5px;font-weight:600;min-height:34px;padding:5px 12px;border-radius:999px;border:1.5px solid var(--line);background:var(--card);color:var(--ink-2);cursor:pointer;transition:all .15s;-webkit-tap-highlight-color:transparent}.sp-chip:hover{border-color:var(--accent);color:var(--ink)}.sp-chip.is-on,.sp-chip[aria-pressed=true]{background:var(--accent-soft);border-color:var(--accent);color:var(--ink)}.sp-seg{display:inline-flex;padding:3px;border-radius:999px;background:var(--card-2);border:1px solid var(--line);gap:2px;flex-wrap:wrap}.sp-seg button{font-family:var(--f-ui);font-size:13.5px;font-weight:700;border:0;background:transparent;color:var(--ink-2);padding:6px 13px;min-height:32px;border-radius:999px;cursor:pointer}.sp-seg button.is-on,.sp-seg button[aria-pressed=true]{background:var(--card);color:var(--ink);box-shadow:var(--shadow)}.sp-range{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:10px;font-family:var(--f-ui);font-size:14px;font-weight:600;color:var(--ink-2)}.sp-range output{font-family:var(--f-mono);font-size:13.5px;color:var(--ink);min-width:3.5em;text-align:right}.sp input[type=range]{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:100%;height:28px;background:transparent;cursor:pointer;touch-action:pan-y}.sp input[type=range]::-webkit-slider-runnable-track{height:6px;border-radius:3px;background:linear-gradient(to right,var(--accent) var(--fill, 50%),var(--line) var(--fill, 50%))}.sp input[type=range]::-moz-range-track{height:6px;border-radius:3px;background:var(--line)}.sp input[type=range]::-moz-range-progress{height:6px;border-radius:3px;background:var(--accent)}.sp input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:22px;height:22px;margin-top:-8px;border-radius:50%;background:var(--card);border:2.5px solid var(--accent);box-shadow:var(--shadow)}.sp input[type=range]::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:var(--card);border:2.5px solid var(--accent)}.sp input[type=text],.sp textarea,.sp input[type=number]{font:inherit;font-family:var(--f-ui);font-size:16px;color:var(--ink);background:var(--card);border:1.5px solid var(--line-2);border-radius:var(--radius-sm);padding:10px 14px;width:100%;transition:border-color .15s}.sp input[type=text]:focus,.sp textarea:focus{outline:none;border-color:var(--accent)}.sp-top{position:sticky;top:0;z-index:40;height:var(--top-h);display:flex;align-items:center;gap:14px;padding:0 max(16px,env(safe-area-inset-left));background:color-mix(in srgb,var(--paper) 86%,transparent);-webkit-backdrop-filter:blur(14px) saturate(1.3);backdrop-filter:blur(14px) saturate(1.3);border-bottom:1px solid color-mix(in srgb,var(--line) 70%,transparent);font-family:var(--f-ui)}.sp-top__back{text-decoration:none;font-size:20px;color:var(--ink-3);width:32px;height:32px;display:grid;place-items:center;border-radius:50%}.sp-top__back:hover{background:var(--card-2);color:var(--ink)}.sp-top__brand{display:flex;align-items:center;gap:9px;text-decoration:none;min-width:0}.sp-logo{width:30px;height:30px;flex:none}.sp-top__name{font-family:var(--f-display);font-weight:700;font-size:20px;letter-spacing:-.01em}.sp-top__course{font-size:13px;font-weight:600;color:var(--ink-3);white-space:nowrap}.sp-top__where{flex:1;min-width:0;display:flex;align-items:baseline;gap:10px;justify-content:center;opacity:0;transform:translateY(6px);transition:opacity .25s,transform .25s;font-size:14px}.sp-top.is-scrolled .sp-top__where{opacity:1;transform:none}.sp-top.is-scrolled .sp-top__course{display:none}.sp-top__n{font-weight:800;color:var(--accent);white-space:nowrap}.sp-top__title{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sp--hub .sp-top__brand{flex:1}.sp-top__toc{display:flex;align-items:center;gap:8px;border:1.5px solid var(--line);background:var(--card);color:var(--ink);border-radius:999px;padding:4px 12px 4px 5px;font:700 13.5px var(--f-ui);cursor:pointer;min-height:36px}.sp-ring{width:26px;height:26px;border-radius:50%;background:conic-gradient(var(--accent) calc(var(--p) * 1%),var(--line) 0);-webkit-mask:radial-gradient(circle,transparent 7.5px,black 8px);mask:radial-gradient(circle,transparent 7.5px,black 8px)}.sp-top__link{text-decoration:none;font-weight:700;font-size:13.5px;color:var(--ink-2);padding:6px 8px;border-radius:8px}.sp-top__link:hover{color:var(--ink);background:var(--card-2)}.sp--code .sp-top__brand{flex:1}.sp-top__lang{text-decoration:none;font-weight:800;font-size:13px;color:var(--ink-2);padding:6px 10px;border-radius:999px;border:1.5px solid var(--line)}.sp-top__lang:hover{border-color:var(--accent);color:var(--ink)}@media (max-width: 760px){.sp-top{gap:8px}.sp-top__course,.sp-top__toc-label,.sp-top__link{display:none}.sp-top__toc{padding:4px}.sp-top__where{justify-content:flex-start;font-size:13px}.sp-top__n,.sp--chapter .sp-top.is-scrolled .sp-top__name{display:none}.sp--chapter .sp-top:not(.is-scrolled) .sp-top__where{flex:1}}.sp-hero{max-width:calc(var(--wide) + 40px);margin:0 auto;padding:56px 20px 28px;display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:40px;align-items:center}.sp-hero__title{font-family:var(--f-display);font-weight:650;font-size:clamp(38px,6vw,64px);line-height:1.02;letter-spacing:-.025em;margin:0 0 18px}.sp-hero__lead{font-size:21px;line-height:1.5;color:var(--ink-2);margin:0 0 24px;max-width:34em}.sp-hero__learn{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 20px;box-shadow:var(--shadow);max-width:560px}.sp-hero__learn-title{margin:0 0 6px;font:800 12px var(--f-ui);letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3)}.sp-hero__learn ul{margin:0;padding:0;list-style:none;font-family:var(--f-ui);font-size:15.5px;line-height:1.5}.sp-hero__learn li{padding:4px 0 4px 26px;position:relative}.sp-hero__learn li:before{content:"";position:absolute;left:3px;top:11px;width:11px;height:11px;border-radius:50% 0;background:var(--accent);transform:rotate(-12deg)}.sp-hero__art{display:grid;place-items:center}.sp-hero__art sp-plant{width:260px;height:300px}@media (max-width: 860px){.sp-hero{grid-template-columns:1fr;padding-top:28px;gap:8px}.sp-hero__art{order:-1;justify-items:start}.sp-hero__art sp-plant{width:120px;height:138px}.sp-hero__lead{font-size:19px}}.sp-ch__grid{max-width:calc(var(--wide) + 40px);margin:0 auto;padding:0 20px 40px;display:grid;grid-template-columns:200px minmax(0,1fr);gap:48px}.sp-ch__toc{position:sticky;top:calc(var(--top-h) + 28px);align-self:start;font-family:var(--f-ui);font-size:14px;padding-top:36px}.sp-ch__toc-title{margin:0 0 8px;font-weight:800;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3)}.sp-ch__toc ol{list-style:none;margin:0;padding:0;border-left:2px solid var(--line)}.sp-ch__toc a{display:block;text-decoration:none;color:var(--ink-3);padding:6px 0 6px 14px;margin-left:-2px;border-left:2px solid transparent;line-height:1.35;font-weight:600;transition:color .15s,border-color .15s}.sp-ch__toc a:hover{color:var(--ink)}.sp-ch__toc a.is-on{color:var(--ink);border-left-color:var(--accent)}@media (max-width: 1100px){.sp-ch__grid{grid-template-columns:minmax(0,1fr)}.sp-ch__toc{display:none}}.sp-prose{min-width:0;max-width:var(--col);padding-top:24px}.sp-prose>*{margin-top:0}.sp-prose p{margin:0 0 1.05em}.sp-prose h2{font-family:var(--f-display);font-weight:650;font-size:clamp(28px,4vw,36px);line-height:1.12;letter-spacing:-.02em;margin:2.2em 0 .6em;scroll-margin-top:calc(var(--top-h) + 20px)}.sp-prose h3{font-family:var(--f-ui);font-weight:800;font-size:19px;letter-spacing:-.005em;margin:1.8em 0 .5em;scroll-margin-top:calc(var(--top-h) + 20px)}.sp-prose ul,.sp-prose ol{padding-left:1.3em;margin:0 0 1.1em}.sp-prose li{margin:.25em 0}.sp-prose li::marker{color:var(--accent);font-family:var(--f-ui);font-weight:700}.sp-prose strong{font-weight:650}.sp-prose a{color:var(--accent);text-decoration-thickness:1.5px;text-underline-offset:3px}.sp-prose code{font-family:var(--f-mono);font-size:.84em;background:var(--code-bg);border-radius:6px;padding:.1em .38em;overflow-wrap:anywhere}.sp-prose blockquote{margin:1.4em 0;padding:.2em 0 .2em 1.1em;border-left:3px solid var(--accent);font-style:italic;color:var(--ink-2)}.sp-prose hr{border:0;height:1px;background:var(--line);margin:2.4em 0}.sp-prose .lead-in:first-letter{font-family:var(--f-display);float:left;font-size:3.4em;line-height:.9;padding:.06em .1em 0 0;color:var(--accent);font-weight:700}.sp-prose kbd{font-family:var(--f-mono);font-size:.8em;border:1px solid var(--line-2);border-bottom-width:2px;border-radius:5px;padding:.05em .4em;background:var(--card)}.sp-prose .katex{font-size:1.06em}.sp-prose .katex-display{margin:1.2em 0;overflow-x:auto;overflow-y:hidden;padding:4px 0}.sp-prose figure,.sp-prose .fig{margin:1.8em 0}.sp-prose .fig--wide{width:min(var(--wide) - 248px,calc(100vw - 40px));max-width:none}@media (max-width: 1100px){.sp-prose .fig--wide{width:100%}}.sp-prose figcaption{font-family:var(--f-ui);font-size:14px;line-height:1.5;color:var(--ink-3);margin-top:10px;padding:0 4px}.sp-card,.sp-prose .widget{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;font-family:var(--f-ui);font-size:15px;line-height:1.5;position:relative}@media (max-width: 560px){.sp-card,.sp-prose .widget{padding:16px 14px;border-radius:15px}}.widget__title{font:800 12px var(--f-ui);letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin:0 0 12px}.widget__row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.widget__hint{font-size:13.5px;color:var(--ink-3);margin:10px 0 0}.widget canvas,.widget svg{display:block;max-width:100%}.sp-prose .note{margin:1.6em 0;padding:16px 18px 14px;border-radius:var(--radius-sm);background:var(--note-bg, var(--card-2));border:1px solid color-mix(in srgb,var(--note-c, var(--ink-3)) 22%,transparent);font-family:var(--f-ui);font-size:15.5px;line-height:1.55}.sp-prose .note>:last-child{margin-bottom:0}.sp-prose .note:before{display:block;font:800 11.5px var(--f-ui);letter-spacing:.08em;text-transform:uppercase;color:var(--note-c, var(--ink-3));margin-bottom:6px;content:var(--note-label, "")}.sp-prose .note--math{--note-c: var(--sky);--note-bg: var(--sky-soft)}.sp-prose .note--py{--note-c: var(--sun);--note-bg: var(--sun-soft)}.sp-prose .note--research{--note-c: var(--plum);--note-bg: var(--plum-soft)}.sp-prose .note--tip{--note-c: var(--moss);--note-bg: var(--moss-soft)}.sp-prose .note--warn{--note-c: var(--terracotta);--note-bg: var(--terracotta-soft)}html[lang=ru] .sp-prose .note--math{--note-label: "Математика"}html[lang=ru] .sp-prose .note--py{--note-label: "Python"}html[lang=ru] .sp-prose .note--research{--note-label: "Исследователю"}html[lang=ru] .sp-prose .note--tip{--note-label: "Подсказка"}html[lang=ru] .sp-prose .note--warn{--note-label: "Осторожно"}html[lang=en] .sp-prose .note--math{--note-label: "Maths"}html[lang=en] .sp-prose .note--py{--note-label: "Python"}html[lang=en] .sp-prose .note--research{--note-label: "For researchers"}html[lang=en] .sp-prose .note--tip{--note-label: "Tip"}html[lang=en] .sp-prose .note--warn{--note-label: "Careful"}.sp-prose .key{margin:2em 0;padding:20px 22px 18px;background:var(--card);border-radius:4px 4px var(--radius) var(--radius);border-top:5px solid var(--accent);box-shadow:var(--shadow);font-family:var(--f-display);font-size:21px;line-height:1.4;font-weight:500;transform:rotate(-.4deg)}.sp-prose .key>:last-child{margin-bottom:0}.sp-prose details.deeper{margin:1.4em 0;border:1.5px dashed var(--line-2);border-radius:var(--radius-sm);padding:0 18px;font-size:17px}.sp-prose details.deeper>summary{cursor:pointer;list-style:none;font:700 15.5px var(--f-ui);padding:14px 0;display:flex;gap:10px;align-items:center}.sp-prose details.deeper>summary::-webkit-details-marker{display:none}.sp-prose details.deeper>summary:before{content:"+";width:24px;height:24px;display:grid;place-items:center;border-radius:50%;background:var(--accent-soft);color:var(--accent);font-weight:800;flex:none;transition:transform .2s}.sp-prose details.deeper[open]>summary:before{transform:rotate(45deg)}.sp-prose details.deeper[open]{padding-bottom:6px}.sp-prose .table-wrap{overflow-x:auto;margin:1.4em 0;-webkit-overflow-scrolling:touch}.sp-prose table{border-collapse:collapse;font-family:var(--f-ui);font-size:15px;width:100%}.sp-prose th,.sp-prose td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line);vertical-align:top}.sp-prose th{font-weight:800;font-size:12.5px;letter-spacing:.04em;text-transform:uppercase;color:var(--ink-3)}py-cell{display:block;margin:1.6em 0}.py{border-radius:var(--radius-sm);background:var(--code-bg);border:1px solid color-mix(in srgb,var(--line-2) 70%,transparent);overflow:hidden;font-family:var(--f-ui)}.py__bar{display:flex;align-items:center;gap:8px;padding:6px 8px 6px 14px;border-bottom:1px solid color-mix(in srgb,var(--line-2) 50%,transparent);font-size:12.5px;font-weight:700;color:var(--ink-3)}.py__file{flex:1;font-family:var(--f-mono);font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.py__file:before{content:"🐍 "}.py__bar button{font:700 12.5px var(--f-ui);border:0;background:transparent;color:var(--ink-2);padding:5px 9px;border-radius:8px;cursor:pointer;min-height:30px}.py__bar button:hover{background:color-mix(in srgb,var(--ink) 7%,transparent);color:var(--ink)}.py__bar button.py__run{background:var(--moss);color:var(--on-accent)}.py__bar button.py__run:hover{background:color-mix(in srgb,var(--moss) 85%,black)}.py__code{margin:0;padding:14px 16px 16px;font-family:var(--f-mono);font-size:13.8px;line-height:1.6;color:var(--code-ink);overflow-x:auto;-moz-tab-size:4;tab-size:4;white-space:pre;-webkit-overflow-scrolling:touch}.py__code[contenteditable=true]{outline:none;caret-color:var(--terracotta)}.py__code .k{color:var(--hl-key);font-weight:500}.py__code .s{color:var(--hl-str)}.py__code .n{color:var(--hl-num)}.py__code .c{color:var(--hl-com);font-style:italic}.py__code .f{color:var(--hl-fn)}.py__code .b{color:var(--hl-self)}.py__out{margin:0;padding:12px 16px;font-family:var(--f-mono);font-size:13px;line-height:1.55;white-space:pre-wrap;word-break:break-word;border-top:1px dashed var(--line-2);background:color-mix(in srgb,var(--card) 60%,var(--code-bg));color:var(--ink-2);max-height:340px;overflow:auto}.py__out:empty{display:none}.py__out.is-error{color:var(--rose)}.py__out:before{content:"▸ ";color:var(--moss)}@media (max-width: 560px){.py__code{font-size:12.8px;padding:12px}}.sp-pager{max-width:calc(var(--wide) + 40px);margin:0 auto;padding:20px 20px 60px;display:grid;grid-template-columns:1fr 1.6fr;gap:16px}.sp-pager__card{display:flex;flex-direction:column;gap:4px;text-decoration:none;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s;font-family:var(--f-ui)}.sp-pager__card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.sp-pager__card--next{text-align:right;align-items:flex-end;border-color:color-mix(in srgb,var(--accent) 40%,var(--line))}.sp-pager__dir{font-size:13px;font-weight:800;color:var(--accent)}.sp-pager__n{font-size:12.5px;font-weight:700;color:var(--ink-3)}.sp-pager__title{font-family:var(--f-display);font-size:22px;font-weight:650;line-height:1.2}.sp-pager__lead{font-size:14.5px;color:var(--ink-2);margin-top:4px;max-width:30em}@media (max-width: 700px){.sp-pager{grid-template-columns:1fr}.sp-pager__card--next{order:-1}}.sp-drawer{border:0;padding:0;margin:0 0 0 auto;height:100%;max-height:100%;width:min(420px,92vw);background:var(--paper);color:var(--ink);box-shadow:var(--shadow-lg);font-family:var(--f-ui)}.sp-drawer::backdrop{background:#1e181059;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}.sp-drawer[open]{animation:sp-drawer-in .28s cubic-bezier(.2,.8,.2,1)}@keyframes sp-drawer-in{0%{transform:translate(40px);opacity:0}}.sp-drawer__head{position:sticky;top:0;display:flex;align-items:center;justify-content:space-between;padding:14px 16px 10px 22px;background:var(--paper);border-bottom:1px solid var(--line)}.sp-drawer__title{margin:0;font-family:var(--f-display);font-weight:650;font-size:22px}.sp-drawer__close{width:40px;height:40px;border-radius:50%;border:0;background:var(--card-2);font-size:16px;cursor:pointer;color:var(--ink)}.sp-drawer__list{list-style:none;margin:0;padding:10px 12px 40px}.sp-drawer__list>li>a{display:flex;gap:12px;align-items:baseline;padding:10px;border-radius:12px;text-decoration:none;font-weight:700;font-size:15.5px}.sp-drawer__list>li>a:hover{background:var(--card-2)}.sp-drawer__list>li.is-here>a{background:var(--card);box-shadow:var(--shadow)}.sp-drawer__n{font-family:var(--f-display);color:var(--ink-3);width:1.6em;text-align:right;flex:none}.sp-drawer__list>li.is-done .sp-drawer__n{color:var(--moss)}.sp-drawer__sub{list-style:none;margin:4px 0 8px 46px;padding:0;border-left:2px solid var(--line)}.sp-drawer__sub a{display:block;padding:6px 12px;text-decoration:none;color:var(--ink-2);font-size:14.5px;font-weight:600}.sp-cover{max-width:calc(var(--wide) + 40px);margin:0 auto;padding:64px 20px 40px;display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:32px;align-items:center}.sp-cover__title{font-family:var(--f-display);font-weight:650;font-size:clamp(42px,7vw,76px);line-height:1;letter-spacing:-.03em;margin:0 0 20px}.sp-cover__lead{font-size:20px;line-height:1.55;color:var(--ink-2);margin:0 0 28px;max-width:32em}.sp-cover__cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:32px}.sp-cover__art{display:grid;place-items:center}.sp-cover__art sp-plant{width:min(380px,100%);height:440px}.sp-facts{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;font-family:var(--f-ui)}.sp-facts li{display:flex;flex-direction:column;gap:2px}.sp-facts strong{font-family:var(--f-display);font-size:26px;font-weight:650;color:var(--accent);line-height:1.1}.sp-facts span{font-size:13.5px;color:var(--ink-3);line-height:1.35}@media (max-width: 860px){.sp-cover{grid-template-columns:1fr;padding-top:32px}.sp-cover__art{order:-1}.sp-cover__art sp-plant{height:220px;width:190px}.sp-facts{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:18px}}.sp-hubchat,.sp-map,.sp-need{max-width:calc(var(--wide) + 40px);margin:0 auto;padding:40px 20px;font-family:var(--f-ui)}.sp-hubchat__head,.sp-map__head{max-width:640px;margin-bottom:20px}.sp-hubchat h2,.sp-map h2,.sp-need h2{font-family:var(--f-display);font-weight:650;font-size:clamp(30px,4.5vw,42px);letter-spacing:-.02em;margin:0 0 10px;line-height:1.1}.sp-hubchat__head p,.sp-map__head p,.sp-need p{color:var(--ink-2);font-size:16.5px;margin:0}.sp-map__part{margin-top:28px}.sp-map__part-title{display:flex;align-items:center;gap:12px;font:800 14px var(--f-ui);letter-spacing:.06em;text-transform:uppercase;color:var(--ink-2);margin:0 0 14px}.sp-map__part-title span{width:28px;height:28px;display:grid;place-items:center;border-radius:50%;background:var(--ink);color:var(--paper);font-size:13px}.sp-map__list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:14px}.sp-map__card{position:relative;display:grid;grid-template-columns:58px 1fr;grid-template-rows:auto auto 1fr;column-gap:14px;height:100%;padding:16px 18px 16px 12px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);text-decoration:none;transition:transform .2s,box-shadow .2s,border-color .2s}.sp-map__card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:color-mix(in srgb,var(--accent) 45%,var(--line))}.sp-map__card sp-plant{grid-row:1 / 4;width:58px;height:66px;align-self:start}.sp-map__n{font:800 12px var(--f-ui);color:var(--accent);letter-spacing:.05em}.sp-map__title{font-family:var(--f-display);font-size:20px;font-weight:650;line-height:1.2;margin:2px 0 6px}.sp-map__lead{font-size:14px;color:var(--ink-2);line-height:1.45}.sp-map__done{display:none;position:absolute;top:12px;right:14px;font-size:12px;font-weight:800;color:var(--moss)}.sp-map__card.is-done .sp-map__done{display:block}.sp-need{display:grid;grid-template-columns:1fr 1.2fr;gap:40px;padding-bottom:80px}.sp-need ul{padding-left:1.2em;font-size:16.5px;line-height:1.55;color:var(--ink-2)}.sp-need li{margin:8px 0}.sp-files{list-style:none;padding:0;margin:16px 0 0;display:grid;gap:8px}.sp-files a{display:grid;grid-template-columns:34px 1fr auto;align-items:center;gap:10px;text-decoration:none;padding:12px 14px;background:var(--card);border:1px solid var(--line);border-radius:14px;transition:border-color .15s}.sp-files a:hover{border-color:var(--accent)}.sp-files__icon{font-size:22px;text-align:center}.sp-files__name{font-weight:600;font-size:15px}.sp-files__size{font-family:var(--f-mono);font-size:12.5px;color:var(--ink-3)}@media (max-width: 860px){.sp-need{grid-template-columns:1fr}}.sp-foot{border-top:1px solid var(--line);padding:28px 20px 40px;text-align:center;font-family:var(--f-ui);font-size:14px;color:var(--ink-3)}.sp-foot__note{margin:0 auto 12px;max-width:560px}.sp-foot__links{display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:center}.sp-foot__links a{color:var(--ink-2);text-decoration:none;font-weight:600}.sp-foot__links a:hover{color:var(--accent)}sp-plant{display:block}sp-plant svg{width:100%;height:100%;overflow:visible}llm-sprout-now{display:block;margin:3em 0 1em}.now{position:relative;border-radius:26px;background:radial-gradient(500px 240px at 100% 0%,color-mix(in srgb,var(--leaf) 30%,transparent),transparent 70%),var(--card);border:1.5px solid color-mix(in srgb,var(--moss) 35%,var(--line));box-shadow:var(--shadow-lg);padding:24px;font-family:var(--f-ui);font-size:15.5px}.now__head{display:grid;grid-template-columns:76px 1fr;gap:16px;align-items:center;margin-bottom:16px}.now__head sp-plant{width:76px;height:88px}.now__eyebrow{font:800 12px var(--f-ui);letter-spacing:.08em;text-transform:uppercase;color:var(--moss);margin:0 0 4px}.now__title{font-family:var(--f-display);font-size:26px;font-weight:650;line-height:1.15;margin:0}.now__facts{display:flex;flex-wrap:wrap;gap:6px 8px;margin:10px 0 0;padding:0;list-style:none}.now__facts li{font-size:12.5px;font-weight:700;padding:3px 10px;border-radius:999px;background:var(--moss-soft);color:var(--ink-2)}.now__body{font-family:var(--f-text);font-size:17px;line-height:1.55;margin:0 0 16px;color:var(--ink-2)}.now__body>:last-child{margin-bottom:0}@media (max-width: 560px){.now{padding:18px 14px;border-radius:20px}.now__head{grid-template-columns:56px 1fr}.now__head sp-plant{width:56px;height:64px}.now__title{font-size:22px}}.gen{font-family:var(--f-text);font-size:17px;line-height:1.6;background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:14px 16px;min-height:110px;white-space:pre-wrap;word-break:break-word}.gen__prompt{color:var(--ink-3)}.gen__tok{border-radius:3px;transition:background .3s}.gen__tok.is-fresh{background:color-mix(in srgb,var(--accent) 22%,transparent)}.gen__caret{display:inline-block;width:8px;height:1.1em;vertical-align:-.15em;background:var(--accent);border-radius:2px;animation:sp-blink 1s steps(2) infinite;margin-left:1px}@keyframes sp-blink{50%{opacity:0}}.gen__meta{display:flex;gap:12px;flex-wrap:wrap;font-size:12.5px;color:var(--ink-3);margin-top:8px;font-family:var(--f-mono)}llm-chat{display:block}.chat{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow-lg);overflow:hidden;font-family:var(--f-ui);height:min(620px,78svh)}.chat__log{flex:1;overflow-y:auto;padding:20px 18px 8px;display:flex;flex-direction:column;gap:12px;overscroll-behavior:contain}.chat__msg{max-width:82%;padding:10px 15px;border-radius:18px;font-size:16px;line-height:1.5;white-space:pre-wrap;word-break:break-word}.chat__msg--user{align-self:flex-end;background:var(--moss);color:var(--on-accent);border-bottom-right-radius:6px}.chat__msg--bot{align-self:flex-start;background:var(--paper-2);border-bottom-left-radius:6px;font-family:var(--f-text);font-size:17px}.chat__msg--bot.is-empty:after{content:"···";letter-spacing:2px;color:var(--ink-3);animation:sp-blink 1s steps(2) infinite}.chat__who{display:flex;align-items:center;gap:8px;font-size:12px;font-weight:800;color:var(--ink-3);margin:4px 0 -6px 4px}.chat__who svg{width:20px;height:20px}.chat__empty{margin:auto;text-align:center;color:var(--ink-3);max-width:360px;padding:20px}.chat__empty sp-plant{width:90px;height:100px;margin:0 auto 10px}.chat__sugg{display:flex;gap:8px;overflow-x:auto;padding:4px 16px 10px;scrollbar-width:none}.chat__sugg::-webkit-scrollbar{display:none}.chat__sugg button{flex:none}.chat__form{display:flex;gap:8px;padding:12px;border-top:1px solid var(--line);background:var(--card);align-items:flex-end}.chat__form textarea{resize:none;min-height:46px;max-height:140px;border-radius:16px;line-height:1.4}.chat__send{flex:none;width:46px;height:46px;border-radius:50%;border:0;background:var(--moss);color:var(--on-accent);font-size:19px;cursor:pointer;display:grid;place-items:center}.chat__send[disabled]{opacity:.4}.chat__bar{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:8px 14px;border-bottom:1px solid var(--line);font-size:12.5px;color:var(--ink-3)}.chat__status{font-family:var(--f-mono)}.chat__load{height:3px;background:var(--line)}.chat__load span{display:block;height:100%;background:var(--moss);width:0;transition:width .2s}@media (max-width: 560px){.chat{border-radius:18px;height:72svh}.chat__msg{max-width:90%}}llm-quiz{display:block;margin:1.8em 0}.quiz{border:1.5px solid var(--line);border-radius:var(--radius);padding:18px 20px;background:var(--card);font-family:var(--f-ui)}.quiz__q{font-family:var(--f-text);font-size:17.5px;font-weight:600;margin:0 0 12px}.quiz__opts{display:grid;gap:8px}.quiz__opt{text-align:left;font:600 15px var(--f-ui);padding:11px 14px;border-radius:12px;border:1.5px solid var(--line);background:var(--paper);color:var(--ink);cursor:pointer;transition:all .15s}.quiz__opt:hover{border-color:var(--accent)}.quiz__opt.is-right{border-color:var(--moss);background:var(--moss-soft)}.quiz__opt.is-wrong{border-color:var(--rose);background:var(--rose-soft)}.quiz__why{margin:12px 0 0;font-size:15px;color:var(--ink-2)}.sp-bars{display:grid;gap:4px;font-family:var(--f-mono);font-size:13px}.sp-bar{display:grid;grid-template-columns:7.5em 1fr 4.2em;align-items:center;gap:8px}.sp-bar__label{white-space:pre;overflow:hidden;text-overflow:ellipsis;background:var(--paper);border-radius:5px;padding:1px 6px}.sp-bar__track{display:block;height:14px;background:var(--paper-2);border-radius:7px;overflow:hidden}.sp-bar__fill{display:block;height:100%;background:var(--accent);border-radius:7px;transition:width .25s}.sp-bar__val{text-align:right;color:var(--ink-3)}.sp-bar.is-picked .sp-bar__label{background:var(--accent);color:var(--on-accent)}.sp-tok{display:inline;border-radius:4px;padding:1px;margin:0 1px 0 0;box-decoration-break:clone;-webkit-box-decoration-break:clone}.sp-loading{display:flex;align-items:center;gap:10px;color:var(--ink-3);font-size:14px;padding:16px 0}.sp-loading:before{content:"";width:16px;height:16px;border-radius:50%;border:2.5px solid var(--line);border-top-color:var(--accent);animation:sp-spin .8s linear infinite}@keyframes sp-spin{to{transform:rotate(360deg)}}@media (prefers-reduced-motion: reduce){.sp *,.sp *:before,.sp *:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}.sp-body .utility-feedback,.sp-body .utility-feedback-launcher{display:none!important}.sp-code h2 code{font-size:.8em;background:none;padding:0}.sp-code__meta{display:block;margin-top:4px;font-family:var(--f-ui);font-size:14px;color:var(--ink-3)}.sp-code py-cell .py__code{max-height:70svh;overflow:auto}llm-ladder{display:block}.ladder{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px 22px;font-family:var(--f-ui)}.ladder__axis{margin:0 0 10px;font-size:12.5px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--ink-3)}.ladder__list{list-style:none;margin:0;padding:0;display:grid;gap:4px}.ladder__row{display:grid;grid-template-columns:minmax(150px,15em) 1fr 3.2em;align-items:center;gap:12px;padding:6px 8px;border-radius:10px;cursor:default;outline:none}.ladder__row:hover,.ladder__row:focus-visible{background:var(--paper)}.ladder__name{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--ink);text-decoration:none;min-width:0}.ladder__name:hover{color:var(--moss)}.ladder__ch{flex:none;width:22px;height:22px;display:grid;place-items:center;border-radius:50%;background:var(--paper-2);font-size:11.5px;font-weight:800;color:var(--ink-2)}.ladder__track{height:12px}.ladder__bar{display:block;height:12px;border-radius:0 4px 4px 0;background:color-mix(in srgb,var(--moss) 42%,var(--card));transition:width .6s cubic-bezier(.3,.7,.3,1)}.ladder__row.is-final .ladder__bar{background:var(--moss)}.ladder__row.is-final .ladder__name{font-weight:800}.ladder__val{font-family:var(--f-mono);font-size:13px;color:var(--ink-2);text-align:right}.ladder__tip{margin-top:12px;min-height:2.8em;font-size:14px;line-height:1.45;color:var(--ink-2);padding:10px 12px;background:var(--paper);border-radius:10px}@media (max-width: 560px){.ladder{padding:14px 12px}.ladder__row{grid-template-columns:1fr 2.8em;row-gap:4px}.ladder__track{grid-column:1 / -1;order:3}}.sp-growth{max-width:calc(var(--wide) + 40px);margin:0 auto;padding:40px 20px;font-family:var(--f-ui)}.sp-growth__head{max-width:640px;margin-bottom:20px}.sp-growth h2{font-family:var(--f-display);font-weight:650;font-size:clamp(30px,4.5vw,42px);letter-spacing:-.02em;margin:0 0 10px;line-height:1.1}.sp-growth p{color:var(--ink-2);font-size:16.5px;margin:0}.sp-gloss{max-width:calc(var(--wide) + 40px);margin:0 auto;padding:8px 20px 60px;font-family:var(--f-ui)}.sp-gloss__list{margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:12px}.sp-gloss__item{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:14px 16px;scroll-margin-top:calc(var(--top-h) + 16px)}.sp-gloss__item:target{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.sp-gloss dt{margin:0 0 6px}.sp-gloss__term{font-family:var(--f-display);font-size:20px;font-weight:700}.sp-gloss__other{font-size:13px;font-weight:700;color:var(--ink-3);margin-left:4px}.sp-gloss dd{margin:0;font-size:15px;line-height:1.5;color:var(--ink-2)}.sp-gloss dd a{color:var(--accent);font-weight:700;text-decoration:none;white-space:nowrap}.sp--glossary .sp-top__brand,.sp--code .sp-top__brand{flex:1}.gen-box__prompt{resize:none;min-height:44px;line-height:1.4;overflow:hidden;font-family:var(--f-ui)}