.st{--st-board:#0f1b2d;--st-cell:#1d2c44;--st-wall:#b4532a;--st-wall-line:#8a3d1d;--st-trail:#ffcb47;--st-flag:#ffcb47;--st-robot:#2549d6;--st-crash:#9b1c1c;--st-ink:#0f1b2d;background:var(--mist);min-height:100vh}.st-top{background:var(--white);border-bottom:1px solid var(--line)}.st-top__inner{flex-wrap:wrap;align-items:center;gap:14px;min-height:68px;display:flex}.st-top__brand{text-decoration:none;display:inline-flex}.st-top__title{font-family:var(--font-display);color:var(--text-2);border-left:1px solid var(--line-2);padding-left:14px;font-size:20px;font-weight:700}.st-badge{background:var(--sun);color:var(--ink);border-radius:999px;padding:4px 10px;font-size:12px;font-weight:600}.st-link{font:inherit;color:var(--blue);cursor:pointer;background:0 0;border:0;min-height:44px;margin-left:auto;padding:10px 4px;font-weight:600}.st-link:hover{color:var(--blue-deep);text-decoration:underline}.st-body{padding-top:28px;padding-bottom:48px}.st-steps{grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-bottom:24px;display:grid}@media (max-width:760px){.st-steps{grid-template-columns:repeat(2,minmax(0,1fr))}}.st-step{text-align:left;border:1.5px solid var(--line-2);background:var(--white);min-height:64px;color:var(--ink);font:inherit;cursor:pointer;border-radius:14px;align-items:center;gap:12px;padding:14px 16px;display:flex}.st-step:hover{border-color:var(--blue)}.st-step--on{border-color:var(--blue);background:var(--blue);color:var(--white)}.st-step__num{width:32px;height:32px;font-family:var(--font-display);background:var(--blue-soft);color:var(--blue-deep);border-radius:999px;flex-shrink:0;justify-content:center;align-items:center;font-weight:700;display:inline-flex}.st-step--on .st-step__num{background:var(--sun);color:var(--ink)}.st-step__text{flex-direction:column;min-width:0;display:flex}.st-step__label{font-size:16px;font-weight:700}.st-step__blurb{opacity:.85;font-size:13px}.st-panel{background:var(--white);border:1px solid var(--line);border-radius:20px;flex-direction:column;gap:18px;padding:32px;display:flex}@media (max-width:600px){.st-panel{padding:20px}}.st-h1{font-family:var(--font-display);letter-spacing:-.01em;font-size:clamp(26px,3.4vw,34px);font-weight:700;line-height:1.15}.st-lead{color:var(--text-2);max-width:70ch;font-size:17px}.st-intro{flex-direction:column;gap:18px;display:flex}.st-form{flex-direction:column;gap:18px;max-width:720px;display:flex}.st-field{flex-direction:column;gap:8px;display:flex}.st-label{font-size:15px;font-weight:600}.st-input,.st-textarea{font:inherit;color:var(--ink);background:var(--white);border:1.5px solid var(--line-2);border-radius:12px;width:100%;min-height:48px;padding:12px 14px;font-size:16px}.st-input--small{min-height:40px;padding:8px 10px;font-size:14px}.st-input:focus,.st-textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-soft);outline:none}.st-actions{flex-wrap:wrap;gap:10px;display:flex}.button:disabled{opacity:.55;cursor:not-allowed}button.button{cursor:pointer;font-family:inherit}.st-muted{color:var(--muted)}.st-small{font-size:13px}.st-levels{flex-wrap:wrap;gap:8px;display:flex}.st-level{border:1.5px solid var(--line-2);background:var(--white);min-height:40px;color:var(--ink);font:inherit;cursor:pointer;border-radius:999px;align-items:center;gap:6px;padding:8px 16px;font-size:14px;font-weight:600;display:inline-flex}.st-level--on{background:var(--ink);border-color:var(--ink);color:var(--white)}.st-level:disabled{opacity:.5;cursor:not-allowed}.st-level__lock{font-size:12px;font-weight:500}.st-work{grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:start;gap:28px;display:grid}@media (max-width:900px){.st-work{grid-template-columns:minmax(0,1fr)}}.st-board{flex-direction:column;gap:14px;display:flex}.st-grid{width:100%;max-width:440px;height:auto;display:block}.st-robot{transition:transform .28s}@media (prefers-reduced-motion:reduce){.st-robot{transition:none}}.st-result-wrap{max-width:440px}.st-result{border-radius:14px;flex-direction:column;align-items:flex-start;gap:12px;padding:16px;display:flex}.st-result--ok{background:#e7f6ec;border:1.5px solid #2f8a4c}.st-result--bad{background:var(--butter);border:1.5px solid #b7791f}.st-result__msg{font-weight:600}.st-result .st-field{width:100%}.st-code{flex-direction:column;gap:12px;min-width:0;display:flex}.st-palette{flex-wrap:wrap;gap:8px;display:flex}.st-chip{border:1.5px solid var(--blue);background:var(--blue-soft);min-height:40px;color:var(--blue-deep);cursor:pointer;border-radius:10px;padding:8px 12px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px}.st-chip:hover{background:var(--blue);color:var(--white)}.st-editor{background:var(--ink);border-radius:14px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:16px;line-height:1.6;display:flex;overflow:hidden}.st-gutter{color:#7d8aa3;text-align:right;-webkit-user-select:none;user-select:none;background:#16243a;flex-direction:column;min-width:40px;padding:14px 0;display:flex}.st-gutter__n{padding:0 10px;font-size:16px;line-height:1.6}.st-gutter__n--on{background:var(--sun);color:var(--ink);font-weight:700}.st-editor__text{resize:vertical;background:var(--ink);color:#f2f5fb;min-width:0;font:inherit;white-space:pre;border:0;outline:none;flex:1;padding:14px;line-height:1.6;overflow-x:auto}.st-editor:focus-within{box-shadow:0 0 0 3px var(--sun)}.st-meta{color:var(--muted);font-size:13px}.st-help{border:1px solid var(--line);border-radius:12px;padding:12px 16px;font-size:15px}.st-help summary{cursor:pointer;min-height:28px;font-weight:600}.st-help ul{flex-direction:column;gap:6px;margin:10px 0;padding-left:20px;display:flex}.st-help code,.st-pre{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}.st-help code{background:var(--mist);border-radius:6px;padding:1px 6px}.st-lesson{border:2px solid var(--blue);background:var(--blue-soft);border-radius:16px;flex-direction:column;align-items:flex-start;gap:14px;max-width:820px;padding:20px 22px;display:flex}.st-lesson__head{align-items:center;gap:10px;display:flex}.st-lesson__tag{background:var(--sun);color:var(--ink);border-radius:999px;padding:4px 10px;font-size:12px;font-weight:700}.st-lesson__skill{color:var(--blue-deep);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:20px;font-weight:700}.st-lesson__points{flex-direction:column;gap:6px;margin:0;padding-left:20px;font-size:16px;display:flex}.st-lesson__example{flex-direction:column;gap:8px;width:100%;max-width:520px;display:flex}.st-lesson__tip{color:var(--text-2);font-size:15px}.st-lesson-toggle{background:var(--blue-soft);border:1.5px solid var(--blue);color:var(--blue-deep);min-height:40px;font:inherit;cursor:pointer;border-radius:999px;align-self:flex-start;padding:8px 16px;font-size:14px;font-weight:600}.st-hints{flex-direction:column;align-items:flex-start;gap:8px;display:flex}.st-hint{background:var(--butter);border-left:4px solid var(--sun);border-radius:8px;padding:10px 14px;font-size:15px}.st-link--left{margin-left:0;padding-left:0}.st-stats{flex-wrap:wrap;gap:12px;display:flex}.st-stat{background:var(--mist);min-width:140px;color:var(--text-2);border-radius:14px;flex-direction:column;padding:14px 20px;font-size:14px;display:flex}.st-stat__n{font-family:var(--font-display);color:var(--ink);font-size:28px;font-weight:700}.st-empty{border:1.5px dashed var(--line-2);color:var(--muted);border-radius:14px;padding:24px}.st-table-wrap{overflow-x:auto}.st-table{border-collapse:collapse;width:100%;font-size:15px}.st-table th,.st-table td{text-align:left;border-bottom:1px solid var(--line);vertical-align:middle;padding:10px 12px}.st-table thead th{color:var(--muted);font-size:13px;font-weight:600}.st-tag{border-radius:999px;padding:3px 10px;font-size:12px;font-weight:700}.st-tag--ok{color:#1f6b3a;background:#e7f6ec}.st-tag--bad{background:var(--butter);color:#7a4a00}.st-card{border:2px solid var(--ink);border-radius:20px;flex-direction:column;gap:20px;padding:28px;display:flex}.st-card__head{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;display:flex}.st-card__brand{display:inline-flex}.st-card__tag{background:var(--sun);border-radius:999px;padding:6px 12px;font-size:13px;font-weight:600}.st-card__title{font-family:var(--font-display);font-size:clamp(28px,4vw,40px);font-weight:700;line-height:1.1}.st-card__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;display:grid}@media (max-width:640px){.st-card__grid{grid-template-columns:minmax(0,1fr)}}.st-card__h{color:var(--blue);margin-bottom:6px;font-size:13px;font-weight:700}.st-pre{background:var(--ink);color:#f2f5fb;border-radius:12px;margin:0;padding:16px;font-size:15px;line-height:1.6;overflow-x:auto}.st-table--report td,.st-table--report th{text-align:center}.st-table--report th[scope=row]{text-align:left}.st-dot__empty{border:1.5px solid var(--line-2);border-radius:999px;width:12px;height:12px;display:inline-block}.st-dot__mark{background:var(--blue);color:var(--white);border-radius:999px;padding:3px 10px;font-size:12px;font-weight:700;display:inline-block}.st-foot{color:var(--muted);margin-top:20px;font-size:13px}@media print{.st-chrome,.skip-link{display:none!important}.st,.st-panel{background:#fff;border:0;padding:0}.st-card{border:1.5px solid #0f1b2d}.st-dot__mark,.st-pre,.st-card__tag{-webkit-print-color-adjust:exact;print-color-adjust:exact}}