@font-face{font-family:sans;src:url(../media/inter_latin_400_normal-s.p.08vufg9rbrtqu.woff2)format("woff2");font-display:swap;font-weight:400}@font-face{font-family:sans;src:url(../media/inter_latin_500_normal-s.p.037elok7xg7ol.woff2)format("woff2");font-display:swap;font-weight:500}@font-face{font-family:sans;src:url(../media/inter_latin_600_normal-s.p.42bxzpetz5w8g.woff2)format("woff2");font-display:swap;font-weight:600}@font-face{font-family:sans Fallback;src:local(Arial);ascent-override:89.79%;descent-override:22.36%;line-gap-override:0.0%;size-adjust:107.89%}.sNf_Ba_className{font-family:sans,sans Fallback}.sNf_Ba_variable{--font-sans:"sans", "sans Fallback"}
@font-face{font-family:"serif";src:url(../media/source_serif_4_latin_500_normal-s.p.3odirqkonwcnw.woff2)format("woff2");font-display:swap;font-weight:500}@font-face{font-family:"serif";src:url(../media/source_serif_4_latin_600_normal-s.p.06q0e_ipspcv9.woff2)format("woff2");font-display:swap;font-weight:600}@font-face{font-family:serif Fallback;src:local(Arial);ascent-override:94.99%;descent-override:30.72%;line-gap-override:0.0%;size-adjust:109.07%}.IXWLXW_className{font-family:"serif",serif Fallback}.IXWLXW_variable{--font-serif:"serif", "serif Fallback"}
:root{--bg:#f8f6f0;--card:#fff;--ink:#172033;--muted:#545d72;--line:#e2dfd5;--accent:#1f4fd1;--accent-press:#173da6;--tint:#e9eefc;--night:#0a0f1f;--moon:#eef2ff;--moon-muted:#a7b3d1;--electric:#2f62ee;--ice:#8fb0ff;--sans:var(--font-sans), system-ui, sans-serif;--serif:var(--font-serif), Georgia, serif;--mono:ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;--radius:10px;--small:15px;--body:17px;--h2:20px;--h1:40px}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:var(--body);-webkit-font-smoothing:antialiased;margin:0;line-height:1.6}h1,h2{font-family:var(--serif);margin:0;font-weight:600;line-height:1.15}h1{font-size:var(--h1)}h2{font-size:var(--h2)}p{margin:0}a{color:var(--accent)}code{font-family:var(--mono);font-size:var(--small)}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.sr{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.skip{z-index:40;background:var(--card);padding:10px 14px;position:absolute;top:-60px;left:12px}.skip:focus{top:12px}.brand{min-height:44px;color:var(--ink);font-size:var(--small);white-space:nowrap;align-items:center;gap:10px;font-weight:600;text-decoration:none;display:flex}.btn{border-radius:var(--radius);min-height:44px;font:500 var(--body) / 1.25 var(--sans);cursor:pointer;border:0;justify-content:center;align-items:center;padding:10px 20px;text-decoration:none;display:inline-flex}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-press)}.btn-primary:active{transform:translateY(1px)}.dive-open{min-height:44px;color:var(--muted);font:400 var(--small) / 1.3 var(--sans);text-underline-offset:3px;cursor:pointer;background:0 0;border:0;padding:0;text-decoration:underline}.dive-open:hover{color:var(--ink)}.author{color:var(--muted);padding:10px 0;font-size:13px;text-decoration:none;display:inline-block}.author:hover{color:var(--accent);text-underline-offset:3px;text-decoration:underline}.continue{color:var(--muted);font-size:var(--small);padding:10px 0;display:inline-block}.continue:hover{color:var(--ink)}.missing{flex-direction:column;justify-content:center;align-items:flex-start;gap:24px;max-width:560px;min-height:100dvh;margin:0 auto;padding:24px;display:flex}@media (prefers-reduced-motion:reduce){*{animation:none!important}}
.landing{background:var(--night);height:100dvh;color:var(--moon);text-align:center;flex-direction:column;align-items:center;display:flex;position:relative;overflow:hidden}.horizon{flex:0 0 34%;width:100%;position:relative;-webkit-mask-image:linear-gradient(#000 70%,#0000);mask-image:linear-gradient(#000 70%,#0000)}.horizon i{aspect-ratio:1;background:var(--night);width:min(62vw,104vh);box-shadow:0 -1px 2px var(--ice);border-radius:50%;animation:1.6s ease-out backwards rise;position:absolute;top:36%;left:50%;transform:translate(-50%)}.horizon i:before{content:"";box-shadow:0 -6px 34px var(--electric), 0 -26px 120px #2f62ee80, inset 0 10px 44px #2f62ee47;border-radius:50%;animation:7s ease-in-out infinite breathe;position:absolute;inset:0}.horizon i:after{content:"";background:conic-gradient(from 0deg, transparent 0 78%, var(--ice) 92%, #fff 96%, transparent 100%);border-radius:50%;animation:9s linear infinite travel;position:absolute;inset:-1px;-webkit-mask:radial-gradient(farthest-side,#0000 calc(100% - 2px),#000 calc(100% - 1px));mask:radial-gradient(farthest-side,#0000 calc(100% - 2px),#000 calc(100% - 1px))}@keyframes rise{0%{opacity:0;transform:translate(-50%,56px)}}@keyframes breathe{50%{opacity:.55}}@keyframes travel{to{transform:rotate(360deg)}}.landing-main{flex-direction:column;flex:1;justify-content:center;align-items:center;width:100%;max-width:980px;min-height:0;padding:0 24px;display:flex;position:relative}.landing h1{font:500 clamp(24px, 3vw, 50px) / 1.35 var(--sans);text-wrap:balance;letter-spacing:.26em;text-transform:uppercase;margin-right:-.26em}.landing h1:after{content:"";background:var(--ice);width:.5em;height:.09em;margin-left:.1em;animation:1.2s steps(2,end) infinite blink;display:inline-block}@keyframes blink{50%{opacity:0}}.landing-main p{color:var(--moon-muted);font-size:var(--body);margin-top:20px}.btn-start{background:var(--electric);min-height:56px;margin-top:32px;padding:14px 34px}.btn-start:hover{background:var(--accent)}.btn-start:focus-visible,.landing .continue:focus-visible,.landing .author:focus-visible{outline-color:var(--ice)}.landing .continue{color:var(--moon-muted);margin-top:8px}.landing .continue:hover{color:var(--moon)}.landing>.author{color:var(--moon-muted);flex:none;margin-bottom:16px}.landing>.author:hover{color:var(--moon)}@media (max-width:640px){.horizon{flex-basis:26%}.horizon i{width:112vw;top:42%}.landing h1{letter-spacing:.18em;margin-right:-.18em}.btn-start{align-self:stretch}}@media (max-height:480px){.horizon{flex-basis:12%}.landing h1{font-size:22px}.landing-main p{font-size:var(--small);margin-top:8px}.btn-start{align-self:center;min-height:44px;margin-top:14px;padding:8px 24px}.landing>.author{margin-bottom:0;padding:4px 0}}
.course{grid-template-columns:280px minmax(0,1fr);min-height:100dvh;display:grid}.course-main{min-width:0;padding:72px clamp(24px,6vw,96px) 96px}.sidebar{scrollbar-width:thin;flex-direction:column;height:100dvh;padding:24px;display:flex;position:sticky;top:0;overflow-y:auto}.sidebar nav{flex-direction:column;flex:1;display:flex}.sidebar .author,.phonemenu .author{margin-top:auto}.sidebar>.brand{margin-bottom:24px}.phonebar,.phonemenu{display:none}.tree,.tree ol{margin:0;padding:0;list-style:none}.tree-stage{color:var(--muted);font-size:var(--small);padding:7px 0;text-decoration:none;display:block}.tree-stage:hover,.tree-stage.open,.tree-stage[aria-current=page]{color:var(--ink)}.tree-stage.open,.tree-stage[aria-current=page]{font-weight:600}.tree-group{border-top:1px solid var(--line);color:var(--muted);letter-spacing:.06em;text-transform:uppercase;margin-top:14px;padding:14px 0 4px;font-size:13px;font-weight:600;text-decoration:none;display:block}.tree-group:hover{color:var(--accent)}.tree-prompts{margin-top:16px}.tree-lesson{color:var(--muted);font-size:var(--small);align-items:baseline;gap:10px;padding:5px 0;line-height:1.35;text-decoration:none;display:flex}.tree-lesson:hover{color:var(--ink)}.tree-lesson[aria-current=page]{color:var(--accent);font-weight:500}.dot{background:var(--line);border-radius:50%;flex:none;width:7px;height:7px;transform:translateY(-1px)}.dot-done{background:var(--accent)}@media (max-width:960px){.course{display:block}.sidebar{display:none}.course-main{padding:32px 20px 64px}.phonebar{z-index:20;background:var(--bg);justify-content:space-between;align-items:center;min-height:56px;padding:0 20px;display:flex;position:sticky;top:0}.phonemenu{z-index:19;background:var(--bg);flex-direction:column;padding:8px 20px 24px;display:flex;position:fixed;inset:56px 0 0;overflow-y:auto}.phonemenu .tree-group{padding-bottom:8px}.phonemenu .tree-stage,.phonemenu .tree-lesson{font-size:var(--body);padding:11px 0}}
.lesson{counter-reset:step;max-width:680px}.lesson>h1{margin-bottom:32px}.lesson>:not(h1):not(:last-child),.dive-body>*{margin-top:0;margin-bottom:24px}.step{counter-increment:step;padding-left:40px;position:relative}.step:before{content:counter(step);background:var(--ink);width:27px;height:27px;color:var(--bg);font-size:var(--small);border-radius:50%;place-items:center;font-weight:600;display:grid;position:absolute;top:0;left:0}.step>.prompt,.step>.btn{margin-top:12px}.result{border:1px solid var(--line);border-radius:var(--radius);width:100%;max-width:520px;margin-top:12px;display:block}.os{counter-reset:none}.os>div[hidden]{display:none}.os>div:not(.os-tabs)>*+*{margin-top:24px}.os-tabs{background:var(--line);border-radius:8px;gap:4px;margin-bottom:20px;padding:3px;display:inline-flex}.os-tabs button{min-height:36px;color:var(--muted);font:500 var(--small) / 1.2 var(--sans);cursor:pointer;background:0 0;border:0;border-radius:6px;padding:4px 16px}.os-tabs button[aria-pressed=true]{background:var(--card);color:var(--ink)}.prompt{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);margin:0}.prompt figcaption{color:var(--muted);font-size:var(--small);justify-content:space-between;align-items:center;gap:16px;padding:10px 10px 0 20px;display:flex}.prompt pre{font:var(--small) / 1.6 var(--mono);white-space:pre-wrap;overflow-wrap:anywhere;margin:0;padding:8px 20px 20px}.prompt mark{color:var(--accent);background:0 0;font-weight:600}.copy{min-width:84px;font-size:var(--small)}.flow{flex-wrap:wrap;align-items:center;gap:4px 0;padding:0;font-weight:500;list-style:none;display:flex}.flow li+li:before{content:"→";color:var(--muted);margin:0 12px;font-weight:400}.compare{grid-template-columns:1fr 1fr;gap:32px;display:grid}.compare h2{font:600 var(--body) / 1.4 var(--sans);margin-bottom:8px}.compare ul{color:var(--muted);margin:0;padding:0;list-style:none}.compare li+li{margin-top:6px}.rows{margin:0}.rows div{border-top:1px solid var(--line);grid-template-columns:150px minmax(0,1fr);gap:16px;padding:10px 0;display:grid}.rows dt{font-weight:600}.rows dd{color:var(--muted);margin:0}.checklist{padding:0;list-style:none}.checklist label{cursor:pointer;align-items:flex-start;gap:12px;padding:7px 0;display:flex}.checklist input{width:20px;height:20px;accent-color:var(--accent);cursor:pointer;flex:none;margin:4px 0 0}.checklist-done{color:var(--accent);margin-top:8px;font-weight:600}.term{position:relative}.term button{color:inherit;font:inherit;cursor:help;-webkit-text-decoration:underline dotted var(--muted);text-decoration:underline dotted var(--muted);text-underline-offset:3px;background:0 0;border:0;padding:0}.term-pop{z-index:15;border:1px solid var(--line);background:var(--card);width:min(280px,76vw);font-size:var(--small);border-radius:8px;padding:10px 12px;line-height:1.45;position:absolute;top:calc(100% + 6px);left:0}.dive{border-radius:var(--radius);background:var(--bg);width:min(640px,100vw - 32px);max-height:calc(100dvh - 48px);color:var(--ink);border:0;padding:0}.dive::backdrop{background:#17203380}.dive-body{padding:24px}.dive-head{justify-content:space-between;align-items:baseline;gap:16px;display:flex}.next{align-items:center;min-height:44px;margin-top:24px;font-weight:500;text-decoration:none;display:inline-flex}.next:after{content:"→";margin-left:8px}.next:hover{text-underline-offset:3px;text-decoration:underline}.search{border:1px solid var(--muted);border-radius:var(--radius);background:var(--card);width:100%;min-height:48px;color:var(--ink);font:var(--body) var(--sans);padding:10px 16px}.search::placeholder{color:var(--muted)}.prompt-group{margin-bottom:48px}.prompt-group>div{margin-top:24px}.prompt-group>div>p{margin-bottom:8px;font-weight:500}@media (max-width:640px){.lesson>h1{margin-bottom:24px;font-size:34px}.compare{grid-template-columns:minmax(0,1fr);gap:24px}.rows div{grid-template-columns:minmax(0,1fr);gap:2px}.prompt figcaption{padding-left:16px}.prompt pre{padding:8px 16px 16px}}
.mock{margin:12px 0 0;font-size:13px;line-height:1.3}.m-window{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);max-width:520px;overflow:hidden}.m-bar{border-bottom:1px solid var(--line);min-height:30px;color:var(--muted);align-items:center;gap:6px;padding:0 12px;display:flex}.m-bar i{background:var(--line);border-radius:50%;width:8px;height:8px}.m-title{gap:12px;margin-left:auto;display:flex}.m-bar>.m-title:only-child{margin:0 auto}.m-body{min-height:92px;display:flex}.m-side{border-right:1px solid var(--line);width:108px;color:var(--muted);flex-direction:column;flex:none;align-items:flex-start;gap:8px;padding:12px;display:flex}.m-side b{color:var(--ink);font-weight:600}.m-main{flex-direction:column;flex:1;justify-content:flex-end;min-width:0;padding:12px;display:flex}.m-prompt{width:100%;position:relative}.m-input{border:1px solid var(--line);border-radius:8px;align-items:center;gap:10px;padding:10px 12px;display:flex}.m-quiet{color:var(--muted)}.m-row{color:var(--muted);flex-wrap:wrap;gap:8px;margin-top:8px;display:flex}.m-row>span{white-space:nowrap}.m-menu{background:var(--card);border:1px solid var(--line);border-radius:8px;flex-direction:column;align-items:flex-start;gap:6px;margin-top:8px;padding:8px 10px;display:inline-flex;box-shadow:0 4px 14px #1f1a1714}.m-files{justify-content:center;align-items:center}.m-chat{color:var(--ink);margin:0}.m-link{font-family:var(--mono)}.hit{outline:2px solid var(--accent);outline-offset:0;background:var(--tint);color:var(--accent-press);border-radius:6px;padding:2px 7px;font-weight:600;display:inline-block}.hit b{color:inherit}.m-install{justify-content:center;align-items:center;gap:24px;padding:24px 16px;display:flex}.m-icon{border:1px solid var(--line);color:var(--ink);border-radius:10px;padding:16px 12px;font-weight:500;display:inline-block}.m-icon.hit{border-color:#0000;padding:16px 12px}.m-arrow{color:var(--accent);font-size:var(--h2)}@media (max-width:640px){.m-side{width:84px;padding:10px}.m-install{gap:12px}}

