:is(body:has(.sqx:not(.at-home)) .dock-wrap,body:has(.sqx:not(.at-home)) .dock-space,body:has(.sqx:not(.at-home)) .dock-light){display:none!important}.sqx.at-home .sqx-top{display:none}.sqx{--k-from:#2459bd;--k-where:var(--stamp);--k-group:#b4600a;--k-win:#0f7b7b;--k-select:var(--green);--k-order:#7348b8;--a0:#2459bd;--a1:#0e8a6a;--a2:#b4600a;--a3:#7348b8;--a4:#c2416b;--a5:#5d7a12;min-height:100vh;color:var(--ink);flex-direction:column;display:flex}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .sqx{--k-from:#7aa5ff;--k-group:#f5a94a;--k-win:#4fd1c5;--k-order:#b79af0;--a0:#7aa5ff;--a1:#4fd3a2;--a2:#f5a94a;--a3:#b79af0;--a4:#ff8fb1;--a5:#b5d65a}}:root[data-theme=dark] .sqx{--k-from:#7aa5ff;--k-group:#f5a94a;--k-win:#4fd1c5;--k-order:#b79af0;--a0:#7aa5ff;--a1:#4fd3a2;--a2:#f5a94a;--a3:#b79af0;--a4:#ff8fb1;--a5:#b5d65a}.sqx button{font:inherit;color:inherit;cursor:pointer}.sqx kbd{background:var(--paper);box-shadow:inset 0 0 0 1px var(--line);font:700 .72rem var(--mono);color:var(--ink);border-radius:6px;padding:1px 6px;display:inline-block}.sqx-tag{font:800 .66rem/1 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}.sqx-more{font:.74rem var(--mono);color:var(--muted);margin:8px 0 0}.sqx-note{background:var(--paper2);color:var(--muted);border-radius:12px;margin:0 0 12px;padding:10px 14px;font-size:.92rem}.sqx-tip{color:var(--muted);margin:0 0 10px;font-size:.9rem;line-height:1.5}.sqx-tip b{color:var(--ink)}.sqx-top{z-index:50;background:color-mix(in srgb, var(--bg) 90%, transparent);-webkit-backdrop-filter:blur(10px);border-bottom:1.5px solid var(--line);align-items:center;gap:16px;min-height:60px;padding:8px clamp(14px,2.5vw,32px);display:flex;position:sticky;top:0}.sqx-brand{white-space:nowrap;background:0 0;border:0;align-items:baseline;gap:8px;padding:0;display:flex}.sqx-brand b{letter-spacing:-.03em;font-size:1.08rem;font-weight:800}.sqx-brand span{background:var(--ink);color:var(--bg);font:800 .72rem var(--mono);letter-spacing:.12em;border-radius:7px;padding:3px 8px}.sqx-where{align-items:center;gap:14px;min-width:0;margin-right:auto;display:flex}.sqx-crumb{white-space:nowrap;text-overflow:ellipsis;max-width:32ch;font-weight:800;overflow:hidden}.sqx-dots{flex-wrap:wrap;align-items:center;gap:5px;display:flex}.sqx-dots button{background:color-mix(in srgb, var(--ink) 18%, transparent);border:0;border-radius:50%;width:11px;height:11px;padding:0;transition:transform .12s}.sqx-dots button.ls{border-radius:3px;transform:rotate(45deg)scale(.85)}.sqx-dots button.done{background:var(--green)}.sqx-dots button.on{box-shadow:0 0 0 2.5px var(--bg), 0 0 0 4.5px var(--ink)}.sqx-dots button:hover{transform:scale(1.25)}.sqx-dots button.ls:hover{transform:rotate(45deg)scale(1.1)}.sqx-tools{align-items:center;gap:8px;margin-left:auto;display:flex}.sqx-home-link{color:var(--muted);margin-right:6px;font-size:.9rem;font-weight:700;text-decoration:none}.sqx-home-link:hover{color:var(--ink)}.sqx-tbtn{background:var(--ink);white-space:nowrap;border:0;border-radius:11px;height:38px;padding:0 14px;color:var(--bg)!important;font-weight:800!important}.sqx-tbtn.ghost{background:var(--paper);box-shadow:inset 0 0 0 1.5px var(--line);color:var(--ink)!important}.sqx-tbtn.ghost:hover{box-shadow:inset 0 0 0 1.5px var(--ink)}.sqx-icon{background:var(--paper);width:38px;height:38px;box-shadow:inset 0 0 0 1.5px var(--line);border:0;border-radius:11px;place-items:center;display:grid}.sqx-icon svg{fill:none;stroke:currentColor;stroke-width:2px;stroke-linecap:round;stroke-linejoin:round;width:16px;height:16px}.sqh{flex-direction:column;gap:clamp(36px,6vw,64px);width:min(1200px,100%);margin:0 auto;padding:10px clamp(16px,3vw,32px) 90px;display:flex}.sqh>.code-tabs{margin-bottom:calc(30px - clamp(36px,6vw,64px))}.sqh-hero{max-width:820px}.sqh-kicker{font:700 .72rem var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--muted);align-items:center;gap:8px;display:inline-flex}.sqh-kicker:before{content:"";background:var(--stamp);width:22px;height:2px}.sqh-hero h1{letter-spacing:-.05em;text-wrap:balance;margin:14px 0;font-size:clamp(2.5rem,7vw,4.6rem);font-weight:800;line-height:.98}.sqh-hero h1 em{color:var(--stamp);font-style:normal}.sqh-hero>p{max-width:64ch;color:var(--muted);margin:0;font-size:1.12rem;line-height:1.6}.sqh-act{flex-wrap:wrap;gap:10px;margin-top:26px;display:flex}.sqh-ghost{background:var(--paper);height:52px;box-shadow:inset 0 0 0 1.5px var(--line);border:0;border-radius:14px;padding:0 20px;font-weight:800!important}.sqh-ghost:hover{box-shadow:inset 0 0 0 1.5px var(--ink)}.sqh-stats{flex-wrap:wrap;gap:10px 34px;margin:28px 0 0;display:flex}.sqh-stats div{flex-direction:column-reverse;display:flex}.sqh-stats dt{font:700 .68rem var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}.sqh-stats dd{font:600 1.05rem var(--mono);color:var(--muted);margin:0}.sqh-stats dd b{color:var(--ink);letter-spacing:-.03em;font-size:1.9rem}.sqh-how{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;display:grid}.sqh-how div{background:var(--paper);box-shadow:inset 0 0 0 1px var(--line);border-radius:18px;padding:18px 20px}.sqh-how b{font-size:1.02rem;font-weight:800}.sqh-how p{color:var(--muted);margin:6px 0 0;font-size:.95rem;line-height:1.55}.sqh h2{letter-spacing:-.04em;margin:0 0 16px;font-size:clamp(1.6rem,3.2vw,2.2rem);font-weight:800}.sqh-grid{grid-template-columns:repeat(auto-fill,minmax(min(100%,270px),1fr));gap:16px;display:grid}.sqh-ch,.sqh-case{background:var(--paper);text-align:left;box-shadow:inset 0 0 0 1px var(--line);border:0;border-radius:18px;flex-direction:column;align-items:flex-start;gap:8px;padding:20px 20px 18px;transition:transform .15s,box-shadow .15s;display:flex;position:relative}.sqh-ch:hover,.sqh-case:hover{box-shadow:inset 0 0 0 1.5px var(--ink), 0 16px 30px -24px #00000080;transform:translateY(-2px)}.sqh-ch .n{font:800 .8rem var(--mono);color:var(--muted);letter-spacing:.1em}.sqh-ch b,.sqh-case b{letter-spacing:-.025em;font-size:1.25rem;font-weight:800;line-height:1.2}.sqh-ch p,.sqh-case p{color:var(--muted);flex:1;margin:0;font-size:.94rem;line-height:1.5}.sqh-ch .skills{flex-wrap:wrap;gap:4px;display:flex}.sqh-ch .skills i{font:normal 600 .7rem var(--mono);background:var(--paper2);color:var(--ink);border-radius:6px;padding:3px 7px}.sqh-ch .bar{background:var(--paper2);border-radius:3px;width:100%;height:6px;margin-top:4px;overflow:hidden}.sqh-ch .bar i{background:var(--green);border-radius:3px;height:100%;display:block}.sqh-ch small,.sqh-case small{font:.74rem var(--mono);color:var(--muted)}.sqh-ch.going{box-shadow:inset 0 3px 0 var(--green), inset 0 0 0 1px var(--line)}.sqh-ch .stamp,.sqh-case .stamp{border:2.5px solid var(--green);color:var(--green);font:800 .75rem var(--mono);letter-spacing:.16em;border-radius:7px;padding:2px 9px;position:absolute;top:16px;right:16px;transform:rotate(-7deg)}.sqh-cases{grid-template-columns:repeat(auto-fill,minmax(min(100%,420px),1fr));gap:16px;display:grid}.sqh-cases h2{grid-column:1/-1;margin-bottom:0}.sqh-case{background:color-mix(in srgb, var(--k-group) 7%, var(--paper))}.sqh-case-tag{font:800 .68rem var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--k-group)}.sqx-work{flex:1;grid-template-columns:minmax(360px,460px) minmax(0,1fr);align-items:start;gap:22px;padding:18px clamp(14px,2.5vw,32px) 64px;display:grid}.sqx-left{scrollbar-width:thin;flex-direction:column;gap:14px;max-height:calc(100vh - 88px);padding:2px 4px 8px 2px;display:flex;position:sticky;top:74px;overflow:auto}.sqx-left>*{flex:none}.sqx-right{min-width:0}.sqx-q,.sqx-case{background:var(--paper);box-shadow:inset 0 0 0 1px var(--line);border-radius:18px;padding:18px 20px}.sqx-q-top{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.sqx-q-top .lv{background:var(--ink);color:var(--bg);font:800 .66rem var(--mono);letter-spacing:.08em;text-transform:uppercase;border-radius:999px;padding:3px 9px}.sqx-q-top .lv.lv1{background:var(--green);color:#fff}.sqx-q-top .lv.lv2{background:var(--k-group);color:#fff}.sqx-q-top .lv.lv3{background:var(--stamp);color:#fff}.sqx-q-top .lv.ls{background:var(--k-from);color:#fff}:root[data-theme=dark] .sqx-q-top .lv:is(.lv1,.lv2,.lv3,.ls){color:#10131c}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .sqx-q-top .lv:is(.lv1,.lv2,.lv3,.ls){color:#10131c}}.sqx-q-top .sk,.sqx-q-top .seen{font:700 .72rem var(--mono);color:var(--muted)}.sqx-q-top .paid{border:2px solid var(--green);color:var(--green);font:800 .72rem var(--mono);letter-spacing:.16em;border-radius:6px;margin-left:auto;padding:1px 8px;transform:rotate(-6deg)}.sqx-q h1,.sqx-case h1{letter-spacing:-.03em;margin:10px 0 6px;font-size:1.5rem;font-weight:800;line-height:1.15}.sqx-q .ask{margin:0;font-size:1.05rem;line-height:1.55}.sqx-q .shape{background:var(--paper2);color:var(--muted);border-radius:10px;margin:12px 0 0;padding:9px 12px;font-size:.9rem}.sqx-q .shape b{color:var(--ink)}.sqx-chips{flex-wrap:wrap;gap:6px;margin-top:12px;display:flex}.sqx-chips button{background:color-mix(in srgb, var(--k-from) 10%, var(--paper));border:0;border-radius:8px;height:30px;padding:0 10px;color:var(--k-from)!important;font:700 .76rem var(--mono)!important}.sqx-chips button:before{content:"▦ ";opacity:.7}.sqx-chips button:hover{background:color-mix(in srgb, var(--k-from) 18%, var(--paper))}.sqx-q .hints{flex-direction:column;gap:6px;margin:12px 0 0;padding-left:20px;font-size:.93rem;line-height:1.5;display:flex}.sqx-q .hints li::marker{font:800 .8rem var(--mono);color:var(--k-group)}.sqx-q .reveal{background:color-mix(in srgb, var(--green) 10%, var(--paper));box-shadow:inset 3px 0 0 var(--green);border-radius:12px;margin:14px 0 0;padding:12px 14px;line-height:1.55}.sqx-q .reveal.outro{background:color-mix(in srgb, var(--k-group) 10%, var(--paper));box-shadow:inset 3px 0 0 var(--k-group);font-weight:600}.sqx-q-act{flex-wrap:wrap;gap:8px;margin-top:14px;display:flex}.sqx-q-act button{height:34px;box-shadow:inset 0 0 0 1.5px var(--line);background:0 0;border:0;border-radius:10px;padding:0 12px;font-size:.86rem!important;font-weight:700!important}.sqx-q-act button:hover{box-shadow:inset 0 0 0 1.5px var(--ink)}.lesson{margin-top:10px;font-size:1rem;line-height:1.7}.lesson p{margin:0 0 10px}.lesson ul,.lesson ol{margin:0 0 10px;padding-left:20px}.lesson li{margin:3px 0}.lesson code{font:600 .86em var(--mono);background:var(--paper2);border:0;border-radius:5px;padding:1px 5px}.lesson pre{background:var(--bg);box-shadow:inset 0 0 0 1px var(--line);font:500 .86rem/1.6 var(--mono);border-radius:12px;margin:10px 0 12px;padding:12px 14px;overflow-x:auto}.lesson pre code{background:0 0;padding:0;font-weight:500}.lesson table{border-collapse:collapse;margin:8px 0 12px;font-size:.88rem}.lesson th,.lesson td{border-bottom:1px solid var(--line);text-align:left;padding:5px 10px}.lesson th{font:700 .76rem var(--mono)}.lesson-card .watch{background:color-mix(in srgb, var(--stamp) 8%, var(--paper));box-shadow:inset 3px 0 0 var(--stamp);border-radius:10px;margin:10px 0 0;padding:10px 12px;font-size:.93rem;line-height:1.5}.lesson-card .watch b{color:var(--stamp)}.lesson-card .try{color:var(--muted);margin:12px 0 0;font-size:.9rem}.sqx-case .story{margin:12px 0 0;font-size:1.02rem;font-style:italic;line-height:1.6}.sqx-notes{flex-direction:column;gap:6px;margin:10px 0 0;padding:0;list-style:none;display:flex}.sqx-notes li{background:var(--paper2);border-radius:10px;padding:8px 12px;font-size:.9rem;line-height:1.45}.sqx-notes li:before{content:"✓ ";color:var(--green);font-weight:800}.sqx-notes li.open:before{content:"· ";color:var(--muted)}.sqx-notes button{background:0 0;border:0;padding:0;text-decoration:underline;color:var(--muted)!important}.sqx-pager{justify-content:space-between;gap:8px;display:flex}.sqx-pager button{min-width:0;max-width:49%;height:40px;box-shadow:inset 0 0 0 1.5px var(--line);white-space:nowrap;text-overflow:ellipsis;background:0 0;border:0;border-radius:11px;padding:0 12px;overflow:hidden;font-size:.86rem!important;font-weight:700!important}.sqx-pager button:hover{box-shadow:inset 0 0 0 1.5px var(--ink)}.sqx-pager button.go{background:var(--ink);box-shadow:none;margin-left:auto;color:var(--bg)!important}.sqx-ed{background:var(--paper);box-shadow:inset 0 0 0 1px var(--line);border-radius:18px;overflow:hidden}.sqx-ed-box{position:relative}.sqx-ed-hl,.sqx-ed textarea{font:500 14px/1.65 var(--mono);white-space:pre-wrap;overflow-wrap:anywhere;tab-size:2;letter-spacing:0;margin:0;padding:16px 18px}.sqx-ed-hl{pointer-events:none;color:var(--ink);position:absolute;inset:0;overflow:hidden}.sqx-ed textarea{box-sizing:border-box;resize:none;color:#0000;width:100%;min-height:170px;caret-color:var(--ink);-webkit-text-fill-color:transparent;background:0 0;border:0;outline:0;display:block;position:relative;overflow:hidden}.sqx-ed textarea::placeholder{color:var(--muted);-webkit-text-fill-color:var(--muted);opacity:.6}.sqx-ed textarea::selection{background:color-mix(in srgb, var(--k-from) 25%, transparent);-webkit-text-fill-color:transparent}.sqx-ed-hl .k{color:var(--k-from);font-weight:700}.sqx-ed-hl .f{color:var(--k-order)}.sqx-ed-hl .s{color:var(--green)}.sqx-ed-hl .n{color:var(--k-group)}.sqx-ed-hl .q{color:var(--a1)}.sqx-ed-hl .c{color:var(--muted);font-style:italic}.sqx-ed-hl .err{-webkit-text-decoration:wavy underline var(--stamp);text-decoration:wavy underline var(--stamp);text-underline-offset:4px;background:color-mix(in srgb, var(--stamp) 14%, transparent);border-radius:3px}.sqx-ed-bar{border-top:1.5px dashed var(--line);align-items:center;gap:10px;padding:10px 12px 10px 18px;display:flex}.sqx-ed-bar small{color:var(--muted);margin-right:auto;font-size:.72rem}.sqx-clear{background:0 0;border:0;border-radius:10px;height:38px;padding:0 12px;color:var(--muted)!important;font-weight:700!important}.sqx-run{background:var(--ink);height:44px;box-shadow:0 3px 0 0 color-mix(in srgb, var(--ink) 35%, transparent);white-space:nowrap;border:0;border-radius:13px;justify-content:center;align-items:center;gap:8px;padding:0 22px;text-decoration:none;transition:transform .15s;display:inline-flex;color:var(--bg)!important;font-size:.98rem!important;font-weight:800!important}.sqx-run.big{height:52px;padding:0 24px;font-size:1.02rem!important}.sqx-run:hover:not(:disabled){transform:translateY(-1px)}.sqx-run:disabled{opacity:.45;cursor:default}.sqx-run svg{fill:currentColor;width:16px;height:16px}.sqx-out{flex-direction:column;gap:14px;display:flex}.sqx-tabs{background:var(--paper);box-shadow:inset 0 0 0 1px var(--line);border-radius:14px;align-items:center;gap:4px;padding:4px;display:flex}.sqx-tabs button[role=tab]{background:0 0;border:0;border-radius:10px;align-items:center;gap:8px;height:40px;padding:0 16px;display:flex;color:var(--muted)!important;font-weight:800!important}.sqx-tabs button[role=tab] small{font:.72rem var(--mono)}.sqx-tabs button[role=tab][aria-selected=true]{background:var(--ink);color:var(--bg)!important}.sqx-tabs button:disabled{opacity:.45;cursor:default}.sqx-exp{text-underline-offset:3px;background:0 0;border:0;border-radius:10px;height:34px;margin-left:auto;padding:0 12px;text-decoration:underline;color:var(--muted)!important;font-size:.84rem!important;font-weight:700!important}.sqx-exp[aria-pressed=true]{color:var(--ink)!important}.sqx-empty{background:var(--paper);box-shadow:inset 0 0 0 1px var(--line);border-radius:22px;padding:clamp(24px,5vw,56px) clamp(20px,4vw,48px)}.sqx-empty-pipe{flex-wrap:wrap;gap:6px 14px;margin-bottom:22px;display:flex}.sqx-empty-pipe span{font:800 .74rem var(--mono);letter-spacing:.06em;background:var(--paper2);border-radius:10px;padding:7px 12px;position:relative}.sqx-empty-pipe span:not(:last-child):after{content:"→";color:var(--muted);font-weight:400;position:absolute;right:-12px}.sqx-empty-pipe span:first-child,.sqx-empty-pipe span:nth-child(2),.sqx-empty-pipe span:nth-child(3){color:var(--k-from)}.sqx-empty-pipe span:nth-child(4){color:var(--k-where)}.sqx-empty-pipe span:nth-child(5),.sqx-empty-pipe span:nth-child(6){color:var(--k-group)}.sqx-empty-pipe span:nth-child(7){color:var(--k-win)}.sqx-empty-pipe span:nth-child(8){color:var(--k-select)}.sqx-empty-pipe span:nth-child(n+9){color:var(--k-order)}.sqx-empty h2{letter-spacing:-.04em;margin:0 0 8px;font-size:clamp(1.5rem,3vw,2rem);font-weight:800}.sqx-empty p{max-width:62ch;color:var(--muted);margin:0 0 10px;line-height:1.6}.sqx-empty p b{color:var(--ink)}.sqx-empty p.k{margin-top:16px;font-size:.85rem}.sqx-card{background:var(--paper);box-shadow:inset 0 0 0 1px var(--line);border-radius:18px;padding:18px 20px}.sqx-card.err{box-shadow:inset 0 0 0 2px color-mix(in srgb, var(--stamp) 60%, var(--line))}.sqx-card .msg{font:600 1rem/1.5 var(--mono);color:var(--stamp);margin:8px 0 14px}.sqx-ask{background:color-mix(in srgb, var(--k-order) 12%, var(--paper));white-space:nowrap;border:0;border-radius:11px;height:36px;padding:0 14px;color:var(--k-order)!important;font-size:.86rem!important;font-weight:800!important}.sqx-ask:hover{background:color-mix(in srgb, var(--k-order) 20%, var(--paper))}.sqx-verdict{border-radius:16px;align-items:flex-start;gap:16px;padding:16px 18px;display:flex;position:relative}.sqx-verdict.ok{background:color-mix(in srgb, var(--green) 10%, var(--paper));box-shadow:inset 0 0 0 1.5px color-mix(in srgb, var(--green) 45%, transparent)}.sqx-verdict.no{background:color-mix(in srgb, var(--stamp) 7%, var(--paper));box-shadow:inset 0 0 0 1.5px color-mix(in srgb, var(--stamp) 35%, transparent)}.sqx-verdict .stamp{font:800 .86rem 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