:root{--night:#0c1330;--night-2:#141d45;--dusk:#262c5e;--violet:#463868;--ember:#c8694f;--amber:#f2a541;--amber-2:#ffcb7a;--amber-ink:#2b1705;--on-night:#f4ebda;--on-night-2:#b9b4cc;--paper:#fbf5ea;--sand:#f3e8d4;--sand-2:#e8d8bb;--sand-3:#d6bf97;--panel:#ecdfc6;--ink:#241a12;--ink-2:#6a5644;--good:#2c7a56;--good-soft:#dcefe2;--bad:#c2412f;--bad-soft:#f8ded7;--warn:#9a5d00;--warn-soft:#f9ebcf;--card:var(--paper);--muted:var(--ink-2);--line:var(--sand-3);--soft:var(--sand);--accent:#2c3f8f;--accent-soft:#e2e5f6;--accent-ink:#fff;--sky:#dfe2f2;--earth:#d9c29c;--facade:#f6ecd9;--lit:#fbe3b0;--shaft-top:#3a3150;--shaft-bottom:#08060c;--c1:#2c3f8f;--c2:#c8694f;--c3:#2c7a56;--c4:#7a4f9e;--radius:14px;--bar-h:56px;--sans:"Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, system-ui, "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", sans-serif;--mono:ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "D2Coding", "Liberation Mono", monospace;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;background:var(--night)}body{background:radial-gradient(1200px 600px at 70% -10%, #4638688c, transparent 70%), linear-gradient(180deg, var(--night-2) 0%, var(--night) 60%);min-height:100dvh;color:var(--on-night);font:15px/1.55 var(--sans);font-feature-settings:"ss05";-webkit-font-smoothing:antialiased;background-attachment:fixed;margin:0}#app{min-height:100dvh}.boot{color:var(--on-night-2);padding:40px}a{color:inherit}code,pre,kbd{font-family:var(--mono)}var{font-style:italic;font-family:var(--mono)}[hidden]{display:none!important}.screen{min-height:100dvh}.bar{z-index:30;height:var(--bar-h);-webkit-backdrop-filter:blur(10px);background:#0c1330f0;border-bottom:1px solid #ffffff12;justify-content:space-between;align-items:center;gap:10px;padding:0 16px;display:flex;position:sticky;top:0}.bar.dark{background:#0c1330cc}.title-bar{-webkit-backdrop-filter:none;background:0 0;border-bottom:0;justify-content:flex-end;position:absolute;left:0;right:0}.title-bar .mini-brand{display:none}.bar-left,.bar-right{align-items:center;gap:10px;min-width:0;display:flex}.bar-left{flex:auto}.bar-right{flex:none}.back{color:var(--on-night-2);white-space:nowrap;border-radius:8px;align-items:center;gap:6px;padding:6px 10px 6px 4px;font-size:14px;text-decoration:none;display:inline-flex}.back:hover{color:var(--on-night);background:#ffffff0f}.mini-brand{letter-spacing:-.01em;white-space:nowrap;align-items:center;gap:7px;font-weight:800;text-decoration:none;display:inline-flex}.mini-brand .logo{width:26px;height:21px}.bar-title{white-space:nowrap;text-overflow:ellipsis;border-left:1px solid #ffffff26;min-width:0;padding-left:10px;font-size:15px;font-weight:650;overflow:hidden}.bar-ch{color:var(--amber-2);font-weight:700}.icon-btn{min-width:36px;height:36px;color:var(--on-night);font:600 14px var(--sans);cursor:pointer;background:#ffffff0f;border:1px solid #ffffff24;border-radius:10px;justify-content:center;align-items:center;padding:0 9px;text-decoration:none;display:inline-flex}.icon-btn:hover{background:#ffffff1f}.icon-btn .ico{width:20px;height:20px}.icon-btn .slash{stroke:#ff5a4e}.icon-btn .slash-halo{stroke:#141d45}.icon-btn.muted{border-color:#ff5a4e99}.help-btn{color:var(--amber-2);font-size:17px;font-weight:800}.judge-badge{font:600 12.5px var(--sans);color:var(--on-night-2);cursor:pointer;white-space:nowrap;background:#ffffff0f;border:1px solid #ffffff24;border-radius:999px;padding:6px 11px}.judge-badge[data-state=ready]{color:#9be3bd;border-color:#9be3bd59}.judge-badge[data-state=error]{color:#ffb3a6;border-color:#ffb3a666}.logo-stairs{fill:var(--sand-2)}.logo-door{fill:var(--amber)}.logo-lamp{fill:var(--amber-2)}.btn{min-height:42px;font:700 15px var(--sans);cursor:pointer;background:var(--sand-2);color:var(--ink);border:1.5px solid #0000;border-radius:11px;justify-content:center;align-items:center;gap:6px;padding:9px 18px;text-decoration:none;transition:transform .12s,background .12s,box-shadow .12s;display:inline-flex}.btn:hover{transform:translateY(-1px)}.btn:active{transform:translateY(0)}.btn.primary{background:var(--amber);color:var(--amber-ink);box-shadow:0 3px #b7701c}.btn.primary:hover{background:#f7b257}.btn.primary:disabled{opacity:.6;cursor:progress;transform:none}.btn.ghost{color:inherit;opacity:.9;background:0 0;border-color:currentColor}.btn.small{min-height:32px;padding:5px 12px;font-size:13.5px}.btn:disabled{opacity:.45;cursor:default;transform:none}:focus-visible{outline:3px solid var(--amber-2);outline-offset:2px}.title-screen{min-height:100dvh;position:relative;overflow:hidden}.title-stage{position:absolute;inset:0}.title-shade{pointer-events:none;z-index:1;background:linear-gradient(#0a0e24eb 0%,#0a0e24b3 20%,#0a0e2400 40% 66%,#0a0e24c7 84%,#0a0e24f2 100%);position:absolute;inset:0}.title-content{z-index:2;text-align:center;flex-direction:column;justify-content:space-between;align-items:center;gap:24px;min-height:100dvh;padding:50px 24px 20px;display:flex;position:relative}.title-top{flex-direction:column;align-items:center;gap:8px;display:flex}.wordmark{letter-spacing:-.035em;justify-content:center;align-items:center;gap:.2em;margin:0;font-size:clamp(46px,5.4vw,76px);font-weight:860;line-height:1;display:flex}.logo.big{flex:none;width:1.1em;height:.88em}.hook{letter-spacing:-.025em;color:var(--amber-2);text-shadow:0 2px 22px #0a0e24cc;word-break:keep-all;margin:10px 0 0;font-size:clamp(28px,3.7vw,52px);font-weight:800;line-height:1.18}.title-line{max-width:34em;color:var(--on-night);opacity:.86;text-shadow:0 1px 12px #0a0e24e6;word-break:keep-all;margin:0;font-size:clamp(15px,1.3vw,18px);font-weight:550}.title-bottom{flex-direction:column;align-items:center;gap:14px;width:100%;display:flex}.menu{justify-content:center;gap:12px;width:100%;max-width:1040px;display:flex}.menu-btn{-webkit-backdrop-filter:blur(8px);background:#141b40bd;border:1px solid #ffffff29;border-radius:14px;flex-direction:column;flex:1 1 0;justify-content:center;align-items:center;gap:2px;min-width:0;max-width:290px;padding:13px 18px;text-decoration:none;transition:transform .12s,background .12s;display:flex}.menu-btn:hover{background:#202858db;transform:translateY(-2px)}.menu-btn.primary{background:var(--amber);border-color:var(--amber);color:var(--amber-ink);box-shadow:0 4px #b7701c}.menu-btn.primary:hover{background:#f6b259}.menu-label{font-size:18px;font-weight:780}.menu-sub{opacity:.82;word-break:keep-all;font-size:13px}.title-foot{color:var(--on-night-2);flex-wrap:wrap;justify-content:center;gap:6px 16px;font-size:12.5px;display:flex}.page{max-width:1080px;margin:0 auto;padding:30px 20px 64px}.page-head h1{letter-spacing:-.02em;margin:0 0 6px;font-size:34px;font-weight:830}.lead{max-width:70ch;color:var(--on-night-2);word-break:keep-all;margin:0}.page-actions{flex-wrap:wrap;gap:10px;margin-top:20px;display:flex}.page-actions .btn.ghost{color:var(--on-night)}.nudge{background:#f2a5411f;border:1px solid #f2a54180;border-radius:12px;flex-wrap:wrap;align-items:center;gap:10px;margin:18px 0 0;padding:12px 14px;display:flex}.lv-group h2{letter-spacing:.08em;color:var(--amber-2);margin:32px 0 12px;font-size:14px;font-weight:750}.lv-grid{grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px;display:grid}.lv-card{background:var(--sand);color:var(--ink);border:2px solid #0000;border-radius:15px;flex-direction:column;gap:7px;min-width:0;padding:14px 15px 13px;text-decoration:none;transition:transform .12s,box-shadow .12s;display:flex;position:relative}.lv-card:hover{transform:translateY(-2px);box-shadow:0 10px 24px #00000040}.lv-card.next{border-color:var(--amber);box-shadow:0 0 0 5px #f2a54138}.lv-top{justify-content:space-between;align-items:baseline;display:flex}.lv-num{font-size:24px;font-weight:850;line-height:1}.lv-stars{color:#b97a17;letter-spacing:.06em}.lv-title{font-size:16px;font-weight:720}.lv-code{color:var(--ink-2);background:var(--sand-2);white-space:nowrap;text-overflow:ellipsis;border-radius:7px;padding:5px 8px;font-size:12px;overflow:hidden}.lv-tags{gap:6px;min-height:20px;display:flex}.tag{border-radius:999px;padding:2px 9px;font-size:11.5px;font-weight:750}.tag.next{background:var(--amber);color:var(--amber-ink)}.stage{isolation:isolate;touch-action:pan-y;width:100%;height:100%;position:relative;overflow:hidden}.stage-sky{z-index:0;background:radial-gradient(1.5px 1.5px at 12% 14%,#fffc,#0000 60%),radial-gradient(1px 1px at 31% 8%,#ffffffb3,#0000 60%),radial-gradient(1.5px 1.5px at 53% 18%,#fff9,#0000 60%),radial-gradient(1px 1px at 72% 6%,#fffc,#0000 60%),radial-gradient(1.5px 1.5px at 88% 21%,#ffffff80,#0000 60%),radial-gradient(1px 1px at 43% 27%,#ffffff73,#0000 60%),radial-gradient(320px 110px at 78% 70%,#ffc47880,#0000 70%),linear-gradient(#0a1130 0%,#17204b 26%,#353166 44%,#7e4f6a 58%,#cf7d58 68%,#e79a5e 74%,#7a4a4c 86%,#2a1f33 100%);position:absolute;inset:0}.stage-view{z-index:1;position:absolute;inset:0}.stage-gl{width:100%;height:100%;display:block}.stage.loading:after{content:"";border:3px solid #ffffff40;border-top-color:var(--amber);z-index:5;border-radius:50%;width:34px;height:34px;margin:-17px 0 0 -17px;animation:.9s linear infinite spin;position:absolute;top:50%;left:50%}.stage-labels{z-index:2;pointer-events:none;position:absolute;inset:0;overflow:hidden}.l3{--ax:-50%;--ay:-100%;transform:translate(var(--x,-999px), calc(var(--y,-999px) + var(--dy,0px))) translate(var(--ax), var(--ay));white-space:nowrap;pointer-events:none;font-size:12px;line-height:1.2;position:absolute;top:0;left:0}.l3-v{color:#fff3dc;background:#161122cc;border-radius:8px;flex-direction:column;align-items:center;margin-top:-6px;padding:3px 8px;display:flex;box-shadow:0 2px 8px #00000040}.l3-v b{font:800 15px/1.15 var(--mono)}.l3-v small{font:10.5px/1.2 var(--mono);opacity:.78}.l3-v em{color:#ffd2c8;font-size:10.5px;font-style:normal;font-weight:700}.l3-v.real b{color:var(--amber-2)}.l3-v.state{background:#161122b8}.l3-v.state small{opacity:.95;font-size:11px}.l3-v.bad{background:var(--bad)}.l3-v.unknown{font:800 16px var(--mono);color:var(--amber-2)}.l3-v.ghost{background:#c2412f40;border:1.5px dashed #ff9b88}.l3-v.ghost.fenced{opacity:.55;border-color:#c8c2d8}.l3-tick{--ax:-100%;--ay:-50%;font:600 11px var(--mono);color:#fff4ded9;text-shadow:0 1px 2px #0009}.l3-tick.zero{color:var(--amber-2);font-weight:800}.l3-tick.floor{font-family:var(--sans);font-size:12px;font-weight:750}.l3-tick.basement{font-family:var(--sans);color:#cdb8e6;font-size:11.5px;font-weight:700}.l3-door{color:var(--amber-ink);background:var(--amber-2);border-radius:999px;padding:2px 8px;font-size:11.5px;font-weight:750}.l3-mark{color:#fff;background:var(--bad);border-radius:7px;padding:3px 8px;font-size:12px;font-weight:800;box-shadow:0 2px 8px #0000004d}.l3-more{--ax:0%;--ay:-50%;color:var(--on-night);text-shadow:0 1px 3px #000000b3;font-size:13px;font-weight:700}.l3-rail,.l3-zone{border-radius:8px;padding:3px 9px;font-size:12.5px;font-weight:700}.l3-rail{--ax:0%;color:var(--amber-ink);background:#e6a94a}.l3-zone{--ax:0%;color:#10153a;background:#8f9cffe6}.l3-rail code,.l3-zone code{font-size:12.5px}.l3-inf{--ay:-50%;color:var(--amber-2);text-shadow:0 0 18px #ffcb7ab3;font-size:40px;font-weight:800}.l3-inf.big{font-size:64px}.l3-check{background:var(--paper);color:var(--ink);border:2px solid var(--sand-3);border-radius:10px;align-items:center;gap:7px;padding:5px 10px;font-size:13px;display:flex;box-shadow:0 4px 14px #0000004d}.l3-check code{font-weight:700}.l3-check span{font-weight:800}.l3-check.yes{border-color:#3f9d6e}.l3-check.yes span{color:var(--good)}.l3-check.no{border-color:var(--bad)}.l3-check.no span{color:var(--bad)}.stage-hud{z-index:3;pointer-events:none;flex-wrap:wrap;gap:6px;max-width:calc(100% - 24px);display:flex;position:absolute;top:12px;left:12px}.stage-hud span{color:var(--on-night);font:600 13px var(--mono);background:#0c1028bf;border-radius:8px;padding:4px 9px}.hud-step{color:var(--amber-2)!important;font-family:var(--sans)!important}.hud-done{color:#9be3bd!important;font-family:var(--sans)!important}.stage-controls{z-index:3;flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:6px;max-width:58%;display:flex;position:absolute;top:12px;right:12px}.stage-controls:empty{display:none}.pill{font:600 12.5px var(--mono);min-height:30px;color:var(--on-night);cursor:pointer;background:#0c1028b3;border:1px solid #ffffff38;border-radius:999px;padding:4px 11px}.pill.shot{font-family:var(--sans);font-size:13px}.pill:hover{background:#0c1028e6}.pill.on{background:var(--amber);border-color:var(--amber);color:var(--amber-ink)}.pill.zero{border-style:dashed}.pill.ghost{font-family:var(--sans);color:var(--on-night-2)}.pill-label{color:var(--on-night);text-shadow:0 1px 3px #0009;font-size:12px;font-weight:650}.stage-caption{z-index:3;color:var(--on-night);-webkit-backdrop-filter:blur(6px);word-break:keep-all;overflow-wrap:anywhere;background:#0c1028cc;border-radius:11px;margin:0;padding:9px 13px;font-size:14px;line-height:1.5;position:absolute;bottom:12px;left:12px;right:12px}.stage-badge{z-index:3;text-shadow:0 2px 10px #00000080;pointer-events:none;font-size:40px;font-weight:900;line-height:1;position:absolute;bottom:64px;right:18px}.stage-badge[data-badge=✓]{color:#8fe0b4}.stage-badge[data-badge=✗]{color:#ff8a75}.stage-badge[data-badge=∞]{color:var(--amber-2)}.stage.flat .stage-view{justify-content:center;align-items:center;padding:52px 14px 70px;display:flex}.stage.flat .scene-svg{background:var(--paper);width:auto;max-width:100%;max-height:100%}.stage.flat .scene-caption,.stage.flat .scene-controls{display:none}.tut-screen{flex-direction:column;height:100dvh;min-height:0;display:flex}.tut-main{flex:auto;min-height:240px;position:relative}.tut-stage{position:absolute;inset:0}.tut-stage>.stage{width:auto;height:auto;position:absolute;inset:0}.tut-code{z-index:4;width:min(330px,42%);color:var(--ink);background:#fbf5eaf5;border-radius:13px;padding:10px 12px 4px;position:absolute;top:12px;right:12px;box-shadow:0 10px 30px #00000059}.tut-code-head{color:var(--ink-2);font-size:12.5px;font-weight:700}.tut-code .code{margin:6px 0;font-size:13px}.tut-code-facts{color:var(--ink-2);margin:0 0 6px;font-size:12.5px}.tut-code-facts code{background:var(--sand);border-radius:6px;padding:1px 6px;font-size:.92em;font-weight:700}.tut-narr,.guide-box{box-sizing:border-box;border:2px solid var(--amber);color:var(--ink);background:#fff5e1;border-radius:16px;box-shadow:0 10px 26px #06081861}.tut-narr{z-index:7;flex-direction:column;display:flex;position:relative}.tut-narr.waiting{visibility:hidden}.tut-narr-measure{visibility:hidden;pointer-events:none;width:auto;height:auto!important;position:absolute!important;top:0!important;left:0!important}.tut-narr-body{align-items:flex-start;gap:28px;display:flex}.tut-narr-text{box-sizing:border-box;word-break:keep-all;overflow-wrap:anywhere;margin:0;font-size:16.5px;line-height:1.6}.tut-narr-text .np{margin:0}.tut-narr-text .np+.np{margin-top:.6em}.nl{display:block}.nl.li{text-indent:-1.35em;padding-left:1.35em}.nl.li>*{text-indent:0}.tut-narr.fs1 .tut-narr-text,.guide-box.fs1 .tut-narr-text{font-size:16px}.tut-narr-text.fade{animation:.35s both narr-fade}@keyframes narr-fade{0%{opacity:0}}.tut-narr-text strong{color:var(--ember);font-weight:820}.tut-narr-text code{background:var(--sand-2);border-radius:6px;padding:1px 6px;font-size:.92em;font-weight:700}.tut-desk .tut-narr{transform:translateY(calc(var(--band-h,100%) - 100%));padding:16px 20px 10px;position:absolute}.tut-desk .tut-narr.tut-narr-measure{transform:none}.tut-desk .tut-narr-text{width:var(--text-w,760px);flex:none;min-height:3.2em}.tut-desk:not(.has-extra) .tut-narr .tut-narr-text{width:var(--text-full,var(--text-w,760px))}.tut-desk .tut-narr .tut-extra{width:var(--piece-w,400px);flex:none;margin-left:auto}.tut-desk .tut-narr.stacked .tut-narr-body{flex-direction:column;gap:14px}.tut-desk .tut-narr.stacked .tut-extra{margin-left:0}.tut-rings{z-index:9;pointer-events:none;position:absolute;inset:0;overflow:hidden}.tut-ring{box-sizing:border-box;border:2.5px solid var(--amber);border-radius:12px;animation:1.8s ease-in-out infinite ring-pulse;position:absolute;top:0;left:0;box-shadow:0 0 0 3px #f2a54138,0 0 18px #ffbe5a8c}@keyframes ring-pulse{50%{box-shadow:0 0 0 6px #f2a5411a,0 0 26px #ffbe5abf}}.tut-ring[data-target=code],.tut-ring[data-target=codeLine]{border-width:3px;border-color:#ffb547;animation:1.5s ease-in-out infinite ring-pulse-strong;box-shadow:0 0 0 4px #ffb54759,0 0 26px #ffbe5ad9}@keyframes ring-pulse-strong{50%{box-shadow:0 0 0 8px #ffb54729,0 0 38px #ffbe5a}}.tut-code.focus-line .code-line.run{color:#fff;background:#ffb5479e;box-shadow:inset 4px 0 #ffcf7a}.tut-code.focus-line .code-line.run.check-yes{box-shadow:inset 5px 0 #7fe0ac}.tut-code.focus-line .code-line.run.check-no{box-shadow:inset 5px 0 #ff8a75}.guide{z-index:40;pointer-events:none;position:fixed;inset:0}.guide[hidden]{display:none}.guide-rings{position:absolute;inset:0;overflow:hidden}.guide-box{pointer-events:auto;transform:translateY(calc(var(--slot-h,100%) - 100%));flex-direction:column;display:flex;position:absolute}.guide-box.guide-measure{visibility:hidden;pointer-events:none;transform:none;height:auto!important;top:0!important;left:0!important}.guide-top{border-top:1px solid #c99a6259;flex-wrap:wrap;order:1;align-items:center;gap:4px 12px;padding:7px 12px 8px 18px;display:flex}.guide-box.stack-top .guide-head{flex-basis:100%}.guide-head{letter-spacing:.01em;color:var(--ember);flex:auto;margin:0;font-size:13px;font-weight:780}.guide-box .tut-narr-text{max-width:var(--text-w,800px);padding:14px 18px 10px}.guide-nav{white-space:nowrap;align-items:center;gap:6px;margin-left:auto;display:flex}.guide-nav .btn{box-shadow:none}.guide-nav .g-count{text-align:center;min-width:3.4em;font:700 13px var(--mono);color:var(--ink-2)}.guide-nav .g-skip{margin-right:4px;font-size:13.5px}.level-screen.guide-desk .stage-caption{visibility:hidden}.level-screen.guide-sheet .panel-inner{padding-bottom:calc(var(--guide-pad,0px) + 14px)}@media (max-width:760px){.guide-top{padding:7px 9px 6px 14px}.guide-box .tut-narr-text{padding:8px 14px 12px}}.tut-controls{white-space:nowrap;align-items:center;gap:6px;display:flex}.tut-desk .tut-controls{border-top:1px solid #c99a6259;margin:12px -8px 0 -4px;padding:9px 0 0}.tc-count{font:700 13.5px var(--mono);color:var(--ink-2);margin-right:auto;padding:0 4px}.tc-chapter{font-family:var(--sans);color:var(--ember);font-weight:780}.tut-controls .tc-prev{box-shadow:none}.tut-controls .tc-next{min-height:38px;box-shadow:none;padding:6px 18px}.tut-controls .skip{margin:0 6px 0 0;font-size:13.5px;font-weight:600}.tut-extra{box-sizing:border-box;background:var(--paper);border:1px solid var(--sand-3);color:var(--ink);border-radius:13px;padding:12px 14px}.tut-extra>*{margin-top:0!important;margin-bottom:0!important}.tut-extra>.verdict-card-demo{background:0 0;border:0;padding:0}.tut-desk .tut-stage .stage-controls{top:12px;bottom:auto;left:var(--strip-x,340px);right:var(--strip-x,340px);justify-content:center;max-width:none}.tut-desk .tut-stage .stage-caption{top:var(--cap-top,12px);bottom:auto;left:var(--strip-x,340px);right:var(--strip-x,340px);width:-moz-fit-content;width:fit-content;max-width:calc(100% - 2 * var(--strip-x,340px));text-align:center;margin:0 auto}.stepper{flex-direction:column;align-items:flex-start;gap:8px;display:flex}.step-btn{min-width:10em}.step-status{color:var(--ink);margin:0;font-size:14px;line-height:1.5}.step-status code{background:var(--sand-2);border-radius:6px;padding:1px 5px;font-size:.92em;font-weight:700}.legend .card-title{margin:0 0 6px}.legend-table{border-collapse:collapse;width:100%;font-size:13.5px;line-height:1.4}.legend-table td{border-top:1px solid var(--sand-3);vertical-align:top;padding:4px}.legend-table tr:first-child td{border-top:0}.lg-code{width:42%;font-weight:700}.lg-arrow{text-align:center;width:1.4em;color:var(--ember);font-weight:800}.skip{color:var(--ink-2);font:inherit;text-underline-offset:3px;cursor:pointer;background:0 0;border:0;padding:2px 4px;text-decoration:underline}.skip:hover{color:var(--ink)}.verdict-card-demo{border:1px solid var(--sand-3);border-radius:var(--radius);background:#fffaf1;margin:0;padding:12px 14px}.verdict-card-demo .card-title{margin-bottom:8px}.step-title{letter-spacing:-.01em;margin-bottom:4px;font-size:16px;font-weight:800}.verdict-card .step-title{margin-bottom:10px}.step-sub{color:var(--ember);margin:0 0 10px;font-size:14px;font-weight:700}.proof-card.locked{background:var(--sand);border-style:dashed}.proof-card.locked .step-title{color:var(--ink-2)}.step-sub.locked-note{color:var(--ink-2);margin:0;font-weight:600}.verdict.demo.hl{border-color:var(--amber);background:#fde4bd;animation:1.6s ease-in-out infinite hl-pulse;box-shadow:0 0 0 4px #f2a54159}@keyframes hl-pulse{50%{box-shadow:0 0 0 8px #f2a5411f}}.tut-level-card{border-color:var(--amber);background:#fffaf1;margin:0}.try{margin:0}.tut-note{color:var(--ink-2);margin:6px 0 0;font-size:13.5px}.try .try-field{margin-bottom:0}.try .answer{padding:7px 11px;font-size:17px}.try .answer::placeholder{font-family:var(--sans);letter-spacing:normal;color:#a1937f;font-weight:500}.try-status{color:var(--ink-2);margin:5px 0 0;font-size:12.5px;line-height:1.45}.try .chips{margin:10px 0 0}.try .int-note{color:var(--ink-2);opacity:.85;margin:6px 0 0;font-size:12px;line-height:1.45}.try-status.ok{color:var(--good);font-size:13px}.try-status.bad{color:var(--bad);font-size:13px}.level-screen{flex-direction:column;display:flex}.level-main{height:calc(100dvh - var(--bar-h));grid-template-columns:minmax(0,1fr) minmax(390px,500px);display:grid}.stage-wrap{min-width:0;min-height:0;position:relative}.panel{background:var(--panel);min-width:0;color:var(--ink);border-left:1px solid #00000040;overflow-y:auto}.panel-inner{flex-direction:column;gap:10px;padding:12px 14px 14px;display:flex}.card{background:var(--paper);border:1px solid var(--sand-3);border-radius:var(--radius);min-width:0;padding:14px 16px}.card-title{margin:0 0 10px;font-size:15px;font-weight:760}.intro-note{background:var(--dusk);color:var(--on-night);border-radius:12px;flex-wrap:wrap;align-items:center;gap:10px;padding:10px 12px;font-size:14px;display:flex}.intro-note .btn{margin-left:auto}.intro-badge{background:var(--amber);width:24px;height:24px;color:var(--amber-ink);border-radius:50%;place-items:center;font-weight:900;display:grid}.level-head{flex-wrap:wrap;align-items:baseline;gap:4px 10px;display:flex}.level-head .attempt-line{margin:0;font-size:12.5px}.code-card{padding:10px 14px}@media (min-width:901px){.code-card{z-index:2;position:sticky;top:0;box-shadow:0 8px 16px -10px #241a1273}}.code-meta{color:var(--ink-2);margin:2px 0 0;font-size:13.5px;line-height:1.45}.code-meta code{color:var(--ink);font-size:13px}.meta-key{font-weight:700}.level-num{color:var(--ink-2);font-size:13px;font-weight:700}.level-title{letter-spacing:-.01em;margin:0;font-size:19px;font-weight:800}.level-stars{color:#b97a17;letter-spacing:.06em;margin-left:auto}.level-note{color:var(--ink-2);margin:2px 0 0;font-size:13.5px}.code{color:#f4ebda;tab-size:2;background:#221b30;border-radius:11px;margin:8px 0 6px;padding:9px 13px;font-size:13px;line-height:1.45;overflow-x:auto}.code-line{border-radius:5px;min-width:100%;margin:0 -6px;padding:0 6px;transition:background .15s;display:inline-block}.code-line.lit{background:#c2412f52}.code-line.run{background:#f2a5414d}.code-line.check-yes{background:#3f9d6e59}.code-line.check-no{background:#c2412f73}.kw{color:#ffb547;font-weight:700}.nm{color:#8fd8c8}.op{color:#f0a6a0}.verdicts{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;display:grid}.verdict{border:2px solid var(--sand-3);min-height:48px;color:var(--ink);font:760 15px var(--sans);text-align:center;cursor:pointer;background:#fffaf1;border-radius:12px;place-items:center;padding:10px 6px;transition:border-color .12s,background .12s;display:grid}.verdict:hover{border-color:var(--amber)}.verdict.on{border-color:var(--amber);box-shadow:inset 0 -3px 0 var(--amber);background:#fde4bd}.verdict.demo{cursor:default}.verdict-card .verdict{min-height:42px;padding:8px 6px}.verdict-card.collapsed{padding:7px 16px}.proof-card{padding:12px 14px}.verdict-line{margin:0;font-size:14.5px}.verdict-line-key{color:var(--ink-2);font-weight:700}.linkish{color:var(--accent);font:inherit;text-underline-offset:3px;cursor:pointer;background:0 0;border:0;padding:2px;font-weight:700;text-decoration:underline}.linkish:disabled{color:var(--ink-2);cursor:default}.step-head{flex-wrap:wrap;align-items:baseline;gap:2px 10px;margin-bottom:6px;display:flex}.step-head .step-title,.step-head .step-sub{margin:0}.field.inline{grid-template-columns:auto minmax(0,1fr);align-items:center;gap:4px 10px;margin-bottom:8px;display:grid}.field.inline .field-name{white-space:nowrap;margin:0}.field.inline .field-error{grid-column:1/-1}.proof .answer{padding:7px 11px;font-size:17px}.proof .chips{flex-wrap:wrap;align-items:center;gap:5px;margin:2px 0 10px;padding:8px;display:flex}.proof .chip-row{display:contents}.proof .chip-label{min-width:0;margin:0 2px 0 4px}.proof .chip{min-width:30px;min-height:30px;padding:3px 8px;font-size:13px}.judge-slot{flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;display:inline-flex}.judge-slot[data-state=error]{background:var(--bad-soft);color:var(--ink);border-radius:11px;flex:100%;padding:10px 12px}.judge-wait{border:1px dashed var(--sand-3);min-height:40px;color:var(--ink-2);border-radius:11px;align-items:center;padding:0 14px;font-weight:700;display:inline-flex}.judge-wait:before{content:"";border:2px solid var(--sand-3);border-top-color:var(--amber);border-radius:50%;width:12px;height:12px;margin-right:8px;animation:.8s linear infinite spin}.judge-why{word-break:keep-all;flex:100%}.help{color:var(--ink-2);word-break:keep-all;margin:8px 0 0;font-size:13px}.attempt-line{color:var(--ink-2);margin:6px 0 0;font-size:13px}.proof+.proof{border-top:1px dashed var(--sand-3);margin-top:14px;padding-top:14px}.field{margin-bottom:10px;display:block}.field-name{margin-bottom:5px;font-size:14px;font-weight:700;display:block}.field-name small{color:var(--ink-2);font-weight:500}.answer{border:2px solid var(--sand-3);width:100%;min-width:0;color:var(--ink);font:600 18px var(--mono);background:#fff;border-radius:11px;padding:10px 12px}.answer:focus{border-color:var(--amber);outline:none;box-shadow:0 0 0 4px #f2a54140}.answer.invalid{border-color:var(--bad)}.answer.small{width:7.5em;padding:7px 9px;font-size:16px}.field-error{color:var(--bad);margin-top:4px;font-size:13px;display:block}.field-error:empty{display:none}.mini-fields{flex-wrap:wrap;gap:10px 16px;margin-bottom:10px;display:flex}.mini-field{flex-wrap:wrap;align-items:center;gap:6px;font-size:15px;display:flex}.mini-field .field-error{flex-basis:100%}.actions{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.actions.wrap{margin-top:10px}.field-meta{color:var(--ink-2);font-size:13px}.field-meta.over{color:var(--warn)}.proof-status{color:var(--ink-2);font-size:13px}.proof-status.busy:before{content:"";vertical-align:-2px;border:2px solid var(--sand-3);border-top-color:var(--amber);border-radius:50%;width:12px;height:12px;margin-right:6px;animation:.8s linear infinite spin;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}@keyframes pop{0%{opacity:0;transform:translate(var(--x,0), var(--y,0)) translate(var(--ax), calc(var(--ay) + 6px))}}.chips{background:var(--sand);border-radius:11px;margin:4px 0 12px;padding:10px}.chip-row{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.chip-row+.chip-row{margin-top:7px}.chip-label{min-width:3.4em;color:var(--ink-2);font-size:12px;font-weight:700}.chip{border:1px solid var(--sand-3);min-width:34px;min-height:34px;color:var(--ink);font:700 14px var(--mono);cursor:pointer;background:#fff;border-radius:9px;padding:4px 10px}.chip:hover{border-color:var(--amber)}.chip:active{transform:translateY(1px)}.chip-var{background:var(--dusk);border-color:var(--dusk);color:var(--amber-2)}.chip-example{color:var(--ink-2);margin:8px 0 0;font-size:12.5px}.chip-example code{color:var(--ink);background:#fff;border-radius:5px;padding:1px 6px}.headline{margin:0 0 6px;font-size:17px;font-weight:800}.headline.proved{color:var(--good)}.headline.refuted{color:var(--bad)}.headline.undecided,.headline.pending{color:var(--warn)}.answer-echo{margin:0 0 8px;font-size:14px}.checks{gap:6px;margin:6px 0;padding:0;list-style:none;display:grid}.check{background:var(--sand);border-radius:9px;grid-template-columns:22px minmax(0,1fr);align-items:start;gap:6px;padding:8px 10px;display:grid}.check-icon{text-align:center;font-weight:900}.check.pass .check-icon{color:var(--good)}.check.fail{background:var(--bad-soft)}.check.fail .check-icon{color:var(--bad)}.check.unknown .check-icon{color:var(--warn)}.check-name{font-size:14px;font-weight:650}.cex{overflow-wrap:anywhere;margin-top:3px;font-size:14px}.note{color:var(--ink-2);overflow-wrap:anywhere;margin:6px 0 0;font-size:13.5px}.note.hint,.note.collatz{color:var(--ink);background:var(--warn-soft);border-radius:9px;padding:8px 10px}.solved{background:var(--good-soft);border-radius:12px;margin-top:10px;padding:12px 14px}.solved-title{color:var(--good);margin:0;font-size:19px;font-weight:850}.big-stars{color:#b97a17;letter-spacing:.08em}.solved .btn.ghost{color:var(--ink)}.copy-status{word-break:break-all;font-size:13px}.graph-card summary{cursor:pointer;font-size:15px;font-weight:760}.chart-hint{color:var(--ink-2);margin:6px 0;font-size:13px}.modal-overlay{z-index:60;background:#06091899;justify-content:center;align-items:center;padding:16px;display:flex;position:fixed;inset:0}.modal{background:var(--paper);color:var(--ink);border-top:5px solid var(--amber);border-radius:16px;width:100%;max-width:540px;max-height:calc(100dvh - 32px);padding:20px 22px;overflow:auto;box-shadow:0 24px 70px #00000073}.modal.wide{max-width:720px}.modal h2{margin:0 0 8px;font-size:20px}.modal p{margin:8px 0;line-height:1.65}.modal-actions{flex-wrap:wrap;justify-content:flex-end;gap:8px;margin-top:14px;display:flex}.modal .btn.ghost{color:var(--ink)}.rush-main{flex-direction:column;gap:12px;max-width:820px;margin:0 auto;padding:16px 20px 28px;display:flex}.rush-start-main{gap:14px;max-width:1080px}.rush-panel{text-align:center;background:#141b40b8;border:1px solid #ffffff1f;border-radius:18px;flex-direction:column;align-items:center;gap:12px;padding:22px 24px 20px;display:flex}.rush-title{letter-spacing:-.025em;color:var(--amber-2);text-align:center;word-break:keep-all;margin:4px 0 0;font-size:clamp(28px,3.2vw,40px);font-weight:840}.rush-about{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;display:grid}.rush-about-item{color:var(--on-night-2);word-break:keep-all;background:#141b40a8;border:1px solid #ffffff1a;border-radius:14px;padding:14px 16px 15px;font-size:14.5px;line-height:1.6}.rush-about-item h2{color:var(--amber-2);margin:0 0 6px;font-size:16px;font-weight:800}.rush-about-item p{margin:0}.rush-about-item .np+.np{margin-top:.5em}.rush-steps{margin:0;padding-left:20px}.rush-steps li+li{margin-top:2px}.rush-about-box>summary{width:-moz-fit-content;width:fit-content;color:var(--amber-2);cursor:pointer;background:#141b40b8;border:1px solid #ffffff24;border-radius:999px;margin:0 auto;padding:7px 16px;font-weight:750}.rush-about-box[open]>summary{margin-bottom:10px}.rush-tut-link{text-align:center;margin:0;font-size:14.5px}.rush-tut-link a{color:var(--amber-2);font-weight:700}.rush-actions{gap:14px}.rush-modes{max-width:620px}.rush-bests{color:var(--on-night-2);margin:0;font-size:14.5px}.rush-bests-off{opacity:.85;margin-top:4px;font-size:13px;display:block}.rush-nick{flex-wrap:wrap;justify-content:center;align-items:center;gap:6px 10px;margin:0;font-size:16px;display:flex}.rush-nick-key{color:var(--on-night-2)}.rush-nick strong{color:var(--on-night);font-size:18px}.rush-nick-change,.rush-fame-more{color:var(--on-night);background:#ffffff1f}.rush-nick-box{flex-direction:column;align-items:center;gap:6px;width:100%;display:flex}.rush-nick-form{flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;display:flex}.rush-nick-label{align-items:center;gap:8px;font-weight:700;display:flex}.rush-nick-input{border:2px solid var(--sand-3);background:var(--paper);width:12.5em;max-width:60vw;color:var(--ink);font:inherit;border-radius:10px;padding:8px 12px;font-size:16px}.rush-nick-input:focus{border-color:var(--amber);outline:none}.rush-nick-form .btn.ghost{color:var(--on-night)}.rush-nick-msg{color:var(--on-night-2);margin:0;font-size:13.5px}.rush-nick-msg.warn{color:var(--amber-2);font-weight:700}.rush-fame{align-items:stretch;gap:8px}.rush-fame-title{color:var(--amber-2);margin:0;font-size:19px;font-weight:820}.rush-fame-note,.rush-fame-you{color:var(--on-night-2);margin:0;font-size:14.5px}.rush-fame-you{color:var(--amber-2);font-weight:700}.rush-fame-table{border-collapse:collapse;font-variant-numeric:tabular-nums;width:100%;max-width:560px;margin:0 auto;font-size:15px}.rush-fame-table th{color:var(--on-night-2);border-bottom:1px solid #ffffff24;padding:4px 8px 6px;font-size:12.5px;font-weight:650}.rush-fame-table td{border-bottom:1px solid #ffffff0f;padding:7px 8px}.rush-fame-table th,.rush-fame-table td{text-align:center;vertical-align:middle}.rush-fame-table .nick{overflow-wrap:anywhere}.rush-fame-table tr.me td{color:var(--amber-2);background:#f2a54138;font-weight:800}.rush-fame-more{align-self:center}.rush-fame-title{text-align:center}.fame-trophy{font-size:1.05em}.fame-btn{gap:6px}.fame-btn-label{font-weight:700}@media (max-width:760px){.fame-btn-label{display:none}}.fame-page{max-width:760px;margin:0 auto}.fame-actions{justify-content:center;margin-top:6px;display:flex}.rush-hud{color:var(--on-night-2);flex-wrap:wrap;align-items:center;gap:6px 18px;font-size:14.5px;display:flex}.rush-score b{color:var(--on-night);font-variant-numeric:tabular-nums;font-size:20px;font-weight:820}.rush-lives{gap:6px;display:inline-flex}.life{border:2px solid #ffffff47;border-radius:50%;width:14px;height:14px}.life.on{border-color:var(--amber);background:radial-gradient(circle at 40% 35%, var(--amber-2), var(--amber) 70%);box-shadow:0 0 10px #f2a541b3}.rush-streak.hot{color:var(--amber-2);font-weight:760}.rush-count{font-variant-numeric:tabular-nums;margin-left:auto}.rush-timer-row{align-items:center;gap:10px;display:flex}.rush-timer{background:#ffffff1f;border-radius:999px;flex:1;height:10px;position:relative;overflow:hidden}.rush-timer-fill{transform-origin:0;border-radius:inherit;background:var(--amber);transition:transform 50ms linear,background .2s;position:absolute;inset:0}.rush-timer.low .rush-timer-fill{background:var(--ember)}.rush-timer-text{text-align:right;font-variant-numeric:tabular-nums;min-width:3.4em;color:var(--on-night);font-size:15px;font-weight:760}.rush-card{--rush-code:clamp(18px, 2.3vw, 26px);background:var(--paper);color:var(--ink);border:1px solid var(--sand-3);border-radius:18px;flex-direction:column;gap:10px;padding:12px;display:flex;box-shadow:0 14px 34px #00000052}.rush-code-wrap{text-align:center;background:#221b30;border-radius:12px;padding:18px 14px;overflow-x:auto}.rush-code-wrap .code{text-align:left;font-size:var(--rush-code);background:0 0;border-radius:0;margin:0;padding:0;line-height:1.45;display:inline-block;overflow:visible}.rush-input{font-size:calc(var(--rush-code) * 1.08);text-align:center;word-break:keep-all;border-radius:12px;flex-wrap:wrap;justify-content:center;align-items:baseline;gap:2px 16px;margin:0;padding:10px 14px;font-weight:800;line-height:1.3;display:flex}.rush-input-key{font-family:var(--sans);letter-spacing:.02em}.rush-input-math{font-family:var(--mono);white-space:nowrap;font-weight:750}.rush-input-words,.rush-input-sep{font-family:var(--sans)}.rush-input.restricted{background:var(--amber);color:var(--amber-ink);box-shadow:inset 0 0 0 2px #b7701c}.rush-input.any{color:var(--ink);box-shadow:inset 0 0 0 2px var(--sand-3);background:#e6dccb}.rush-input.restricted .rush-input-key{background:var(--amber-ink);color:var(--amber-2);border-radius:6px;padding:0 8px}.rush-input.any .rush-input-key{color:var(--ink-2)}.rush-q{flex-wrap:wrap;justify-content:center;align-items:baseline;gap:4px 10px;margin:0 0 8px;font-size:16px;font-weight:760;display:flex}.rush-q small{color:var(--on-night-2);font-size:13px;font-weight:500}.rush-verdicts{grid-template-columns:1fr 1fr;gap:12px;display:grid}.verdict.rush-verdict{border-radius:14px;justify-content:center;align-items:center;gap:10px;min-height:64px;font-size:19px;display:flex}.rush-verdict kbd,.rush-next kbd{opacity:.6;border:1px solid;border-radius:6px;padding:1px 7px;font-size:12px;font-weight:600}.rush-feedback{color:var(--ink);background:var(--good-soft);cursor:pointer;border:1px solid #2c7a5659;border-radius:16px;padding:14px 16px;position:relative}.rush-feedback.wrong{background:var(--bad-soft);border-color:#c2412f59}.rush-result{flex-wrap:wrap;align-items:baseline;gap:2px 10px;margin:0;font-size:17px;display:flex}.rush-mark{color:var(--good);font-size:22px;font-weight:900}.rush-feedback.wrong .rush-mark{color:var(--bad)}.rush-pts{color:var(--good);font-variant-numeric:tabular-nums;font-weight:800}.rush-truth{margin-left:auto;font-weight:700}.rush-why{word-break:keep-all;overflow-wrap:anywhere;margin:8px 0 0;font-size:15.5px;line-height:1.55}.rush-why code{white-space:nowrap;background:#241a1214;border-radius:5px;padding:0 4px;font-size:.94em}.rush-next-row{justify-content:flex-end;align-items:center;gap:12px;margin-top:10px;display:flex}.rush-next-hint{color:var(--ink-2);font-size:13.5px;font-weight:700}.rush-next{position:relative}.rush-stage-wrap{border:1px solid #ffffff1a;border-radius:16px;height:clamp(220px,32dvh,300px);position:relative;overflow:hidden}.rush-stage{position:absolute;inset:0}.rush-stage.hidden-run{visibility:hidden}.rush-curtain{z-index:6;text-align:center;color:var(--on-night-2);word-break:keep-all;background:radial-gradient(260px 90px at 50% 100%,#ffc47838,#0000 70%),linear-gradient(#0a1130 0%,#17204b 45%,#353166 100%);flex-direction:column;justify-content:center;align-items:center;gap:12px;padding:16px;font-size:14.5px;display:flex;position:absolute;inset:0}.rush-curtain p{margin:0}.rush-curtain-mark{opacity:.85;width:46px;height:37px}.rush-end-wrap{flex-direction:column;gap:12px;display:flex}.rush-end:focus{outline:none}.rush-final{letter-spacing:-.02em;font-variant-numeric:tabular-nums;margin:0;font-size:clamp(36px,4.4vw,54px);font-weight:860}.rush-best.new,.rush-rank{color:var(--amber-2);margin:0;font-weight:760}.rush-rank.offline,.rush-rank.refused{color:var(--on-night);font-weight:650}.rush-rank .btn{color:var(--on-night);background:#ffffff24}.rush-stats,.rush-best{color:var(--on-night-2);margin:0}.rush-share{max-width:100%;margin:6px 0 0}.rush-share code{overflow-wrap:anywhere;background:#ffffff12;border-radius:10px;max-width:100%;padding:8px 12px;font-size:14px;display:inline-block}.rush-copy{flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;display:flex}.rush-copy .btn{color:var(--on-night);background:#ffffff1f}.rush-end-actions{flex-wrap:wrap;justify-content:center;gap:10px;margin-top:6px;display:flex}.rush-end-actions .btn.ghost{color:var(--on-night)}@media (max-width:900px){.rush-about{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:760px){.rush-main{gap:9px;padding:10px 16px 22px}.rush-about{grid-template-columns:1fr;gap:8px}.rush-about-item{padding:12px 14px;font-size:14px}.rush-panel{padding:18px 14px 16px}.rush-hud{gap:4px 12px;font-size:13.5px}.rush-score b{font-size:18px}.rush-card{--rush-code:clamp(15px, 4.2vw, 17px);gap:8px;padding:8px}.rush-code-wrap{padding:12px 8px}.rush-input{gap:2px 10px;padding:8px 10px}.verdict.rush-verdict{min-height:58px;font-size:17px}.rush-verdict kbd,.rush-next kbd,.rush-q small{display:none}.rush-truth{margin-left:0}.rush-stage-wrap{height:230px}.rush-fame-table{font-size:14px}}@media (max-width:900px){.level-main{height:auto;display:block}.stage-wrap{height:50dvh;min-height:320px;max-height:520px}.panel{border-left:0;overflow:visible}}@media (max-width:760px){:root{--bar-h:52px}.bar{gap:6px;padding:0 10px}.bar-left,.bar-right{gap:6px}.back-label{display:none}.bar-left:has(.back) .mini-brand{display:none}.bar-title{padding-left:8px;font-size:14px}.judge-badge{padding:6px 9px}.judge-badge .jb-text{display:none}.icon-btn{min-width:34px;height:34px;padding:0 7px}.title-content{gap:16px;padding:54px 16px 16px}.hook{margin-top:6px}.menu{flex-direction:column;gap:8px;max-width:none}.menu-btn{flex:none;max-width:none;padding:8px 16px}.menu-label{font-size:16.5px}.menu-sub{font-size:12.5px}.page{padding:22px 16px 48px}.page-head h1{font-size:28px}.lv-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}.tut-screen{height:auto;min-height:100dvh}.tut-main{flex-direction:column;flex:1 0 auto;min-height:0;display:flex}.tut-stage{flex:none;height:clamp(300px,46dvh,480px);position:relative;inset:auto}.tut-narr{flex:none;margin:10px 8px 0;position:relative;box-shadow:0 4px 14px #0608182e}.tut-narr-text{min-height:3.2em;padding:11px 14px 10px;font-size:15.5px;line-height:1.6}.tut-narr.fs1 .tut-narr-text,.guide-box.fs1 .tut-narr-text{font-size:15px}.tut-controls{z-index:2;background:#fff5e1;border-top:1px solid #c99a6259;border-radius:0 0 14px 14px;gap:4px;padding:6px 8px 8px;position:sticky;bottom:0}.tut-controls .tc-prev{order:1}.tc-count{flex-direction:column;order:2;align-items:center;margin:0 auto;font-size:12.5px;line-height:1.2;display:flex}.tut-controls .tc-next{order:3;padding:6px 14px;font-size:14.5px}.tut-controls .skip{order:4;margin:0 2px 0 6px}.tc-chapter{font-size:11px}.tc-dot{display:none}.tut-extra{margin:10px 8px 0;padding:12px 14px 14px}.tut-stage .stage-hud{max-width:58%}.tut-stage .stage-controls{justify-content:flex-end;max-width:40%;inset:8px 8px auto auto}.tut-stage .stage-caption{max-width:none;bottom:8px;right:8px}.tut-code{width:auto;box-shadow:none;background:var(--sand);border-radius:12px;margin:10px 10px 0;padding:8px 12px 2px;position:static}.tut-code .code{margin:4px 0 6px;padding:8px 10px;font-size:12px}.tut-code-head{font-size:11px}.stage-controls{justify-content:flex-start;max-width:none;inset:auto 10px 56px}.stage-caption{padding:7px 10px;font-size:13px;bottom:8px;left:8px;right:8px}.stage-hud{top:8px;left:8px}.stage-hud span{padding:3px 7px;font-size:12px}.stage-badge{font-size:30px;top:8px;bottom:auto;right:12px}.panel-inner{padding:10px}.card{padding:12px 13px}.verdict{font-size:14px}}@media (max-width:520px){.l3-v small{display:none}.l3-v b{font-size:13px}.l3-v.state small,.l3-v.ghost small,.tut-stage .l3-v small{display:block}}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important}}.scene-svg,.chart-svg{border-radius:8px;width:100%;height:auto;display:block;overflow:hidden}.sky{fill:var(--sky)}.earth{fill:var(--earth)}.ground-line{stroke:var(--ink);stroke-width:2px}.facade{fill:var(--facade);stroke:var(--line);stroke-width:1px}.band{fill:var(--accent);opacity:.07}.tick{stroke:var(--line);stroke-width:1px}.tick.zero{stroke:#0000}.axis{stroke:var(--muted);stroke-width:1px}.lbl{font:10px var(--sans);fill:var(--muted)}.axis-lbl{font-size:10px}.ground-lbl{fill:var(--ink);font-weight:600}.basement-lbl{fill:var(--muted)}.v-lbl{font:600 10px var(--mono);fill:var(--ink)}.v-lbl.done{fill:var(--muted)}.state-lbl{font:10px var(--mono)}.counter{font:700 12px var(--sans);fill:var(--ink)}.counter.light,.state-lbl.light{fill:#e9edf3}.counter-bg{fill:var(--card);opacity:.72}.counter-bg.dark{fill:#000;opacity:.45}.badge-lbl{font:800 16px var(--sans);fill:var(--accent)}.badge-lbl.light{fill:#fff}.bad-lbl{fill:var(--bad);font-size:13px;font-weight:800}.q{font:700 16px var(--mono);fill:var(--muted)}.stairs{fill:none;stroke:var(--ink);stroke-width:3px;stroke-linejoin:round}.stairs.unknown{stroke:var(--muted);stroke-dasharray:6 5}.stairs.endless{stroke:#c9d2e0}.tread,.riser{stroke:var(--ink);stroke-width:3px;stroke-linecap:round}.tread.done{stroke:var(--muted);stroke-dasharray:4 4}.tread.bad,.riser.bad{stroke:var(--bad);stroke-width:4px}.walker{stroke:var(--accent);fill:var(--accent);stroke-width:2.4px;stroke-linecap:round;transition:transform .25s}.walker path{fill:none}.walker.bad{stroke:var(--bad);fill:var(--bad)}.walker.out{opacity:.35}.walker.light{stroke:#fff;fill:#fff}.door{fill:#9a6a3f}.ring{fill:none;stroke:var(--accent);stroke-width:2.5px;stroke-dasharray:3 5}.ring-arrow{fill:none;stroke:var(--accent);stroke-width:2.2px}.forever{font:700 30px var(--sans);fill:var(--accent);opacity:.35}.node{fill:var(--card);stroke:var(--accent);stroke-width:1.5px}.node.prefix{stroke:var(--muted);stroke-dasharray:3 3}.node-lbl{font:600 10px var(--mono);fill:var(--ink)}.lead{stroke:var(--muted);stroke-width:1.5px;stroke-dasharray:3 3}.railing{stroke:var(--c2);stroke-width:3px;fill:none}.chart-basement{fill:var(--earth);opacity:.6}.series{fill:none;stroke-width:2px;stroke-linejoin:round}.series.bad{stroke:var(--bad);stroke-width:3.5px}.dot.bad{fill:var(--bad)}.dot.exit{fill:var(--card);stroke-width:1.5px}.legend{font:12px var(--mono);color:var(--muted);flex-wrap:wrap;gap:4px 14px;margin-top:6px;display:flex}.legend-item{align-items:center;gap:5px;display:inline-flex}.swatch{border-radius:2px;width:12px;height:3px}.chart-empty{text-align:center;color:var(--muted);background:var(--soft);border-radius:8px;margin:0;padding:24px 8px;font-size:13px}.chart-empty[hidden]{display:none}.title-screen .l3-check{display:none!important}.fame-page .rush-fame-title{font-size:26px}
