@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-cyrillic-ext-wght-normal-BOeWTOD4.woff2)format("woff2-variations");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-cyrillic-wght-normal-DqGufNeO.woff2)format("woff2-variations");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-greek-ext-wght-normal-DlzME5K_.woff2)format("woff2-variations");unicode-range:U+1F??}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-greek-wght-normal-CkhJZR-_.woff2)format("woff2-variations");unicode-range:U+370-377,U+37A-37F,U+384-38A,U+38C,U+38E-3A1,U+3A3-3FF}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-vietnamese-wght-normal-CBcvBZtf.woff2)format("woff2-variations");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-latin-ext-wght-normal-DO1Apj_S.woff2)format("woff2-variations");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-latin-wght-normal-Dx4kXJAl.woff2)format("woff2-variations");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/ibm-plex-mono-cyrillic-ext-500-normal-BqneJy0T.woff2)format("woff2"),url(/assets/ibm-plex-mono-cyrillic-ext-500-normal-BIfNGwUT.woff)format("woff");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/ibm-plex-mono-cyrillic-500-normal-Bq9vWWag.woff2)format("woff2"),url(/assets/ibm-plex-mono-cyrillic-500-normal-Ael50iVv.woff)format("woff");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/ibm-plex-mono-vietnamese-500-normal-DZ4AoWbu.woff2)format("woff2"),url(/assets/ibm-plex-mono-vietnamese-500-normal-C8zxqsMH.woff)format("woff");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/ibm-plex-mono-latin-ext-500-normal-CAhNIIs5.woff2)format("woff2"),url(/assets/ibm-plex-mono-latin-ext-500-normal-CZ70TYgx.woff)format("woff");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/ibm-plex-mono-latin-500-normal-DSY6xOcd.woff2)format("woff2"),url(/assets/ibm-plex-mono-latin-500-normal-CB9ihrfo.woff)format("woff");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Excalifont;src:url(/excalidraw/fonts/Excalifont/Excalifont-Regular-a88b72a24fb54c9f94e3b5fdaa7481c9.woff2)format("woff2");unicode-range:U+20-7E}@font-face{font-family:Cascadia;src:url(/excalidraw/fonts/Cascadia/CascadiaCode-Regular.woff2)format("woff2")}:root{color:#292822;font-synthesis:none;--paper:#fcfbf8;--ink:#292822;--muted:#68655c;--border:#e7e3db;--tint:#f8efe0;--accent:#9a5419;--mono:"IBM Plex Mono", monospace;background:#f5f3ee;font-family:Inter Variable,Inter,sans-serif}*,:before,:after{box-sizing:border-box}html,body,#root{min-width:300px;min-height:100%;margin:0}body{margin:0}button,textarea,input{font:inherit}button{cursor:pointer}button:disabled{cursor:default;opacity:.52}:focus-visible{outline-offset:3px;outline:2px solid #a45f26}h1,h2,h3,p{margin:0}svg{flex-shrink:0}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}.app{grid-template-rows:67px minmax(0,1fr);height:100dvh;min-height:540px;display:grid}.masthead{background:var(--paper);border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:0 29px;display:flex}.brand,.header-actions,.clock{align-items:center;display:flex}.brand{gap:11px}.brand strong{letter-spacing:-.035em;font-size:15px;display:block}.brand span,.eyebrow{font:500 10px/1.3 var(--mono);letter-spacing:.11em;color:var(--muted);margin-top:3px;display:block}.header-actions{gap:18px}.clock{font:500 13px/1 var(--mono);color:#5c594f;font-variant-numeric:tabular-nums;gap:7px}.workspace{grid-template-columns:minmax(0,1fr) clamp(342px,30vw,432px);gap:14px;min-width:0;min-height:0;padding:17px;display:grid}.whiteboard,.interview-panel{background:var(--paper);border:1px solid #e2ded6;border-radius:15px;min-width:0;min-height:0;overflow:hidden}.whiteboard{grid-template-rows:71px minmax(0,1fr) 37px;display:grid}.board-header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;gap:12px;padding:0 21px;display:flex}.board-title .eyebrow{margin:0 0 6px}.board-title h2{letter-spacing:-.038em;font-size:17px;font-weight:640}.board-state{color:var(--muted);white-space:nowrap;align-items:center;gap:7px;font-size:12px;display:flex}.status-dot,.panel-live i{background:#b77435;border-radius:50%;width:6px;height:6px}.board-surface{isolation:isolate;background:#faf9f6;min-width:0;min-height:0;position:relative}.board-surface .excalidraw{--color-primary:#8b4c1b;--color-primary-darker:#713e17;--color-primary-darkest:#5c2f10;--color-primary-light:#f3dfc3;--color-surface-primary-container:#f5e6d2;--color-surface-low:#f6f3ed;--island-bg-color:#fffdfa;--default-bg-color:#faf9f6}.board-surface .excalidraw__canvas{background-image:radial-gradient(circle,#c8beb042 1px,#0000 1px);background-size:21px 21px}.board-empty{z-index:1;color:#625d50;pointer-events:none;text-align:center;flex-direction:column;align-items:center;gap:8px;display:flex;position:absolute;inset:46% 15px auto;transform:translateY(-50%)}.board-empty strong{color:#4c473d;letter-spacing:-.025em;margin-top:5px;font-size:16px;font-weight:620}.board-empty>span{font-size:13px;line-height:1.4}.board-empty-mark{color:#9b6839;background:#fcfaf5;border:1px solid #ded7c9;border-radius:13px;place-items:center;width:52px;height:52px;display:grid}.board-footer{border-top:1px solid var(--border);color:var(--muted);justify-content:space-between;align-items:center;gap:8px;padding:0 17px;font-size:11px;display:flex}.board-footer span:first-child{align-items:center;gap:6px;display:flex}.interview-panel{flex-direction:column;display:flex}.panel-top{border-bottom:1px solid var(--border);align-items:center;gap:11px;min-height:71px;padding:0 19px;display:flex}.panel-mark,.dialog-mark{color:#945723;background:#f6ead8;border:1px solid #eddec7;border-radius:10px;flex-shrink:0;place-items:center;width:36px;height:36px;display:grid}.panel-top h2{letter-spacing:-.02em;font-size:14px;font-weight:670}.panel-top p{color:var(--muted);margin-top:3px;font-size:12px}.panel-live{font:500 11px/1 var(--mono);color:#784713;align-items:center;gap:6px;margin-left:auto;display:flex}.setup{flex-direction:column;flex:1;gap:24px;padding:clamp(19px,3.4vh,32px) 23px 20px;display:flex;overflow-y:auto}.setup-copy .eyebrow{color:#8b5629;margin:0 0 12px}.setup h1{letter-spacing:-.065em;font-size:clamp(27px,3.1vw,42px);font-weight:650;line-height:1.02}.setup-copy p{color:var(--muted);max-width:31ch;margin-top:12px;font-size:13px;line-height:1.55}.clock-expired{color:#8d382b}.setup-options{gap:20px;display:grid}.problem-picker{gap:7px;display:grid}.problem-label{justify-content:space-between;align-items:baseline;gap:8px;display:flex}.problem-label span{color:var(--muted);font-size:11px}.problem-picker label,.duration-picker legend{font-size:13px;font-weight:640}.problem-picker select{width:100%;min-width:0;min-height:43px;color:var(--ink);font:inherit;background:#fffefa;border:1px solid #ded9ce;border-radius:8px;padding:0 10px;font-size:14px}.problem-picker p{color:var(--muted);font-size:13px;line-height:1.5}.duration-picker{border:0;min-width:0;margin:0;padding:0}.duration-picker legend{margin-bottom:7px;padding:0}.duration-options{grid-template-columns:repeat(3,minmax(0,1fr));gap:7px;display:grid}.duration-options label{cursor:pointer}.duration-options span{border:1px solid #ded9ce;border-radius:8px;place-items:center;min-height:41px;font-size:13px;font-weight:620;display:grid}.duration-options input:checked+span{color:#774619;background:#faf3e7;border-color:#d6b994}.duration-options input:focus-visible+span{outline-offset:2px;outline:2px solid #a45f26}.setup-bottom{gap:11px;margin-top:auto;display:grid}.setup-bottom p{color:var(--muted);gap:7px;font-size:11px;line-height:1.45;display:flex}.setup-bottom p svg{margin-top:1px}.primary,.secondary,.icon-button,.text-button{justify-content:center;align-items:center;gap:8px;font-size:13px;font-weight:620;display:inline-flex}.primary,.secondary{border-radius:8px;min-height:39px;padding:0 13px}.primary{color:#fffdf8;background:#2d2b25;border:1px solid #2d2b25}.primary:hover:not(:disabled){background:#453e32}.setup .primary{justify-content:space-between;min-height:45px;padding-inline:15px}.secondary{color:var(--ink);background:#fcfbf8;border:1px solid #ded9ce}.secondary:hover:not(:disabled){background:#f3efe6}.end-button{color:#714728;min-height:34px}.end-button svg{fill:#f0dcc9}.icon-button{color:#6e685a;background:0 0;border:none;border-radius:7px;width:34px;height:34px}.icon-button:hover:not(:disabled){background:#eee9df}.text-button{color:#8b4d1a;background:0 0;border:0;padding:0}.text-button:hover:not(:disabled){text-decoration:underline}.chat-log,.report-content{scrollbar-width:thin;flex:1;min-height:0;padding:19px;overflow-y:auto}.chat-log{flex-direction:column;gap:15px;display:flex}.reference-chat-empty{max-width:32ch;color:var(--muted);font-size:13px;line-height:1.65}.message{background:#f7f4ed;border:1px solid #eee8dc;border-radius:10px;max-width:100%;padding:13px 14px}.message.user{background:#f5ebdd;border-color:#ebe1d1;width:fit-content;max-width:90%;margin-left:auto}.message-label{color:#6c563e;font:500 10px/1.2 var(--mono);text-transform:uppercase;letter-spacing:.065em;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:7px;display:flex}.message-label span{color:#86531f;letter-spacing:0;text-transform:none;align-items:center;gap:4px;display:flex}.message p,.report-content p{white-space:pre-wrap;overflow-wrap:anywhere;font-size:13px;line-height:1.65}.working{color:var(--muted);align-items:center;gap:7px;font-size:12px;display:flex}.spin{animation:.9s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.composer,.panel-actions{border-top:1px solid var(--border);padding:13px 17px}.composer-box{background:#fffefa;border:1px solid #e2dcd1;border-radius:10px;align-items:flex-end;gap:8px;padding:8px;display:flex}.composer-box:focus-within{border-color:#c09d72}.composer textarea{resize:vertical;width:100%;min-height:40px;max-height:150px;color:var(--ink);background:0 0;border:0;outline:0;padding:4px;font-size:13px;line-height:1.55}.composer textarea::placeholder{color:#797467}.send{color:#fff;background:#302c25;border:0;border-radius:7px;flex:none;place-items:center;width:32px;height:32px;display:grid}.composer-hint{color:var(--muted);align-items:center;gap:6px;margin-top:8px;font-size:11px;display:flex}.chat-issue{color:#8d382b;background:#fff4ed;flex-wrap:wrap;align-items:center;gap:8px;padding:8px 17px;font-size:12px;display:flex}.chat-issue .text-button{font-size:12px}.report-tabs{border-bottom:1px solid var(--border);gap:20px;padding:0 17px;display:flex}.report-tabs button{color:var(--muted);background:0 0;border:0;border-bottom:2px solid #0000;min-height:40px;padding:0 2px;font-size:13px}.report-tabs button[aria-pressed=true]{color:var(--ink);border-color:#a16532;font-weight:650}.report-content section{border-bottom:1px solid var(--border);margin-bottom:17px;padding-bottom:17px}.report-content section:last-child{border:0;margin:0;padding:0}.report-content h3{letter-spacing:-.02em;margin-bottom:6px;font-size:14px}.panel-actions{flex-wrap:wrap;justify-content:flex-end;gap:7px;display:flex}dialog{background:var(--paper);width:min(422px,100vw - 30px);color:var(--ink);border:1px solid #e4dbcb;border-radius:16px;padding:24px;box-shadow:0 18px 90px #26201730}dialog::backdrop{background:#2420196e}.dismiss{position:absolute;top:13px;right:13px}.dialog-mark{margin-bottom:15px}dialog h2{letter-spacing:-.045em;font-size:24px;line-height:1.15}dialog p{color:var(--muted);margin:8px 0 17px;font-size:13px;line-height:1.55}dialog form{gap:13px;display:grid}dialog label{gap:6px;font-size:12px;font-weight:600;display:grid}dialog input{width:100%;color:var(--ink);background:#fffefa;border:1px solid #ddd5c7;border-radius:8px;padding:10px;font-size:16px}dialog .error{color:#8d382b;margin:0}.dialog-actions,.dialog-links{flex-wrap:wrap;justify-content:space-between;gap:8px;display:flex}.dialog-links{margin-top:13px}.app-issue{z-index:3;background:#fff5eb;border:1px solid #e7c6ac;border-radius:8px;align-items:center;gap:9px;width:fit-content;max-width:calc(100% - 24px);margin-inline:auto;padding:6px 8px 6px 13px;font-size:13px;display:flex;position:fixed;bottom:12px;left:12px;right:12px}.mobile-tabs{display:none}@media (width<=760px){.app{grid-template-rows:58px 47px minmax(0,1fr);min-height:500px}.masthead{padding:0 13px}.header-actions{gap:9px}.brand img{width:30px;height:30px}.brand{gap:7px}.brand strong{font-size:13px}.brand span{letter-spacing:.07em;font-size:8px}.clock{gap:3px;font-size:11px}.clock svg{width:12px}.end-button{gap:4px;padding-inline:6px;font-size:11px}.end-button svg{width:10px}.mobile-tabs{align-items:center;gap:6px;padding:0 9px;display:flex}.mobile-tabs button{min-height:35px;color:var(--muted);background:0 0;border:1px solid #0000;border-radius:7px;flex:1;justify-content:center;align-items:center;gap:6px;font-size:13px;display:flex}.mobile-tabs button[aria-pressed=true]{background:var(--paper);border-color:var(--border);color:var(--ink);font-weight:640}.workspace{padding:0 8px 8px;display:block;position:relative}.whiteboard,.interview-panel{border-radius:12px;width:100%;height:100%}[data-mobile-tab=chat] .whiteboard,[data-mobile-tab=board] .interview-panel{visibility:hidden;pointer-events:none;width:auto;height:auto;position:absolute;inset:0 8px 8px}.whiteboard{grid-template-rows:56px minmax(0,1fr) 32px}.board-header{padding:0 12px}.board-title h2{font-size:14px}.board-state{font-size:10px}.panel-top{min-height:56px;padding-inline:15px}.setup{gap:16px;padding:18px 16px 15px}.setup h1{font-size:30px}.setup-copy .eyebrow{margin-bottom:7px}.setup-copy p{margin-top:7px}.wide-break{display:none}.problem-picker select,.composer textarea{font-size:16px}}@media (prefers-reduced-motion:reduce){.spin{animation:none}}.brand,.primary,.secondary,.back-link{text-decoration:none}.brand{color:inherit;border-radius:6px}.brand:hover strong{color:#794c29}.home-actions{gap:10px;display:grid}.home-actions .secondary,.puzzle-entry{justify-content:space-between}.puzzle-entry{margin-top:7px}.back-link{color:#794c29;align-items:center;gap:7px;width:fit-content;font-size:13px;font-weight:620;display:inline-flex}.back-link:hover{text-decoration:underline}.puzzle-instructions{font-size:14px;line-height:1.65}.puzzle-meta{color:var(--muted);font-size:12px;line-height:1.5}.puzzle-page .masthead{min-height:67px}.puzzle-library{width:min(100% - 44px,1010px);margin:0 auto;padding:50px 0 56px}.puzzle-library h1{letter-spacing:-.065em;margin:8px 0 10px;font-size:clamp(32px,5vw,54px);line-height:1.05}.puzzle-library>p{max-width:62ch;color:var(--muted);font-size:14px;line-height:1.6}.puzzle-filter{gap:7px;width:min(100%,365px);margin-top:20px;display:grid}.puzzle-filter label{font-size:13px;font-weight:620}.puzzle-filter select{border:1px solid var(--border);background:var(--paper);min-width:0;min-height:42px;color:var(--ink);font:inherit;border-radius:8px;padding:0 10px;font-size:16px}.puzzle-topic{margin-top:30px}.puzzle-topic-heading{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:8px 16px;margin-bottom:10px;display:flex}.puzzle-topic-heading h2{letter-spacing:-.03em;font-size:21px;font-weight:650}.puzzle-list{border-top:1px solid var(--border);grid-template-columns:repeat(2,minmax(0,1fr));column-gap:28px;margin:0;padding:0;list-style:none;display:grid}.puzzle-list li{border-bottom:1px solid var(--border)}.puzzle-list a{min-height:91px;color:var(--ink);grid-template-columns:29px minmax(0,1fr) auto;align-items:center;gap:11px;padding:12px 9px;text-decoration:none;display:grid}.puzzle-list a:hover{background:#fcfbf8}.puzzle-index{color:var(--accent);font:500 12px var(--mono)}.puzzle-info{gap:3px;display:grid}.puzzle-info strong{letter-spacing:-.025em;font-size:16px}.puzzle-answer{width:100%;padding:26px clamp(16px,4vw,48px);overflow:auto}.puzzle-answer>*{max-width:660px}.puzzle-scenario{margin:0 0 22px;font-size:15px;line-height:1.6}.puzzle-answer fieldset{border:0;min-width:0;margin:0 0 22px;padding:0}.puzzle-answer legend,.answer-explanation{font-size:14px;font-weight:650}.answer-options,.ordered-steps{gap:7px;margin:9px 0 0;display:grid}.ordered-steps{padding:0;list-style:none}.answer-options label,.answer-options button,.ordered-steps button{text-align:left;border:1px solid var(--border);background:var(--paper);width:100%;min-height:42px;color:var(--ink);border-radius:7px;align-items:center;gap:9px;padding:9px 11px;font-size:14px;line-height:1.4;display:flex}.answer-options input{accent-color:#794c29;margin:0}.answer-options :is(input,svg),.ordered-steps svg{flex-shrink:0}.ordered-steps svg{margin-left:auto}:is(.answer-options label:has(input:checked),.ordered-steps button){background:#f5ede3;border-color:#d5b99c}.puzzle-answer fieldset:not(:disabled) :is(button,label){cursor:pointer}.answer-explanation{margin-bottom:7px;display:block}.puzzle-answer textarea{resize:vertical;border:1px solid var(--border);width:100%;min-height:112px;color:var(--ink);background:var(--paper);font:inherit;border-radius:7px;padding:10px 11px;font-size:14px;line-height:1.5;display:block}.solution-surface{flex-direction:column;min-width:0;min-height:0;display:flex}.solution-original{flex:1;grid-template-rows:minmax(0,1fr);min-height:0;display:grid}.solution-original[hidden]{display:none}.solution-tabs{border-bottom:1px solid var(--border);flex-wrap:wrap;gap:4px;padding:7px 12px;display:flex}.solution-tabs button{min-height:34px;color:var(--muted);background:0 0;border:1px solid #0000;border-radius:7px;padding:5px 11px;font-size:13px}.solution-tabs button[aria-pressed=true]{background:var(--tint);color:var(--ink);border-color:#e8d7c2;font-weight:650}.report-tabs button:last-child:not([aria-pressed]){color:#794c29;margin-left:auto;font-weight:620}.reference-diagram{flex:1;grid-template-rows:auto minmax(0,1fr);min-height:0;margin:0;display:grid}.reference-toolbar{border-bottom:1px solid var(--border);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:0 8px;padding:5px 13px;display:flex}.reference-toolbar span{color:var(--muted);font:500 11px/1.4 var(--mono)}.reference-toolbar div{gap:12px;display:flex}.reference-toolbar button{white-space:nowrap;background:0 0;border:0;min-height:32px;padding:5px 0}.reference-toolbar button[aria-label=Zoom\ in]{justify-content:center;min-width:24px;font-size:17px}.reference-canvas[hidden]{display:none}.reference-scroll{background:#faf9f6;min-height:0;padding:16px 24px;font-size:14px;line-height:1.55;overflow:auto}.reference-scroll ol{margin:0;padding-inline-start:22px}.reference-scroll li{margin-bottom:10px}.reference-scroll p{color:var(--muted);margin:3px 0 0}.reference-scroll section+section{margin-top:8px}@media (width<=400px){.report-tabs{gap:10px;padding-inline:12px}.reference-toolbar{padding-inline:8px}.reference-toolbar div{gap:9px}.reference-toolbar button{font-size:12px}}@media (width<=650px){.puzzle-page .masthead{min-height:55px}.puzzle-library{width:calc(100% - 32px);padding-top:31px}.puzzle-list{grid-template-columns:1fr}.puzzle-list a{min-height:83px}}.keys-section{border-top:1px solid var(--border);margin-top:36px;padding-top:22px}.keys-section h2,.keys-discussion h2{letter-spacing:-.03em;margin:0 0 12px;font-size:21px}.keys-section a{display:inline-flex}.keys-page{width:min(100% - 32px,1540px);margin:0 auto;padding:19px 0 44px}.keys-page>.primary{margin-top:16px;display:flex}.keys-title{flex-wrap:wrap;justify-content:space-between;align-items:end;gap:10px 20px;margin:10px 0 14px;display:flex}.keys-title h1{letter-spacing:-.05em;margin:0;font-size:clamp(27px,4vw,42px);line-height:1.1}.keys-title p,.keys-discussion p{color:var(--muted);margin:5px 0 0;font-size:14px;line-height:1.55}.keys-board{border:1px solid var(--border);border-radius:12px;grid-template-rows:auto minmax(0,1fr);height:clamp(480px,76dvh,920px);margin:0;display:grid;overflow:hidden}.keys-toolbar{border-bottom:1px solid var(--border);background:var(--paper);flex-wrap:wrap;gap:6px;padding:8px;display:flex}.keys-toolbar .secondary{min-height:32px;padding:5px 9px}.keys-toolbar .secondary[aria-pressed=true]{background:var(--tint);border-color:#d5b99c}.keys-discussion{max-width:760px;margin-top:24px}.keys-discussion details{border-top:1px solid var(--border);padding:10px 0}.keys-discussion summary{cursor:pointer;font-size:14px;font-weight:600}.owner-review-tab{border:1px solid var(--border);min-height:34px;color:var(--ink);border-radius:7px;align-items:center;padding:5px 10px;font-size:12px;font-weight:650;text-decoration:none;display:inline-flex}.owner-review-tab:hover,.owner-review-tab[aria-current]{background:var(--tint);color:#794c29}.owner-review-toolbar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin:24px 0 10px;display:flex}.owner-review-toolbar .solution-tabs{border:1px solid var(--border);background:var(--paper);border-radius:8px}.owner-review-toolbar .solution-tabs a{min-height:34px;color:var(--muted);border:1px solid #0000;border-radius:7px;align-items:center;padding:5px 10px;font-size:13px;text-decoration:none;display:inline-flex}.owner-review-toolbar .solution-tabs a:hover{color:var(--ink)}.owner-review-toolbar .solution-tabs a[aria-current]{background:var(--tint);color:var(--ink);border-color:#e8d7c2;font-weight:650}.owner-library .owner-progress{margin:0 0 12px}.owner-exercise-list a{grid-template-columns:minmax(0,1fr) auto;min-height:76px}.owner-guide-list{margin-top:18px}.owner-guide{margin-top:24px}.owner-guide h2{letter-spacing:-.04em;margin:12px 0 8px;font-size:clamp(24px,4vw,36px);line-height:1.12}.owner-guide h3{margin:24px 0 10px;font-size:18px}.owner-guide p,.owner-guide dd{max-width:84ch;color:var(--muted);font-size:14px;line-height:1.65}.owner-guide>p{margin:0 0 12px}.owner-guide-schema+p{margin-top:12px}.owner-guide-steps{gap:12px;padding-left:22px;display:grid}.owner-guide-steps p{margin:3px 0 0}.owner-guide-schema{border-block:1px solid var(--border);margin:0}.owner-guide-schema>div{grid-template-columns:minmax(0,190px) minmax(0,1fr);gap:12px;padding:11px 0;display:grid}.owner-guide-schema>div+div{border-top:1px solid var(--border)}.owner-guide-schema dt{font-weight:650}.owner-guide-schema dd{overflow-wrap:anywhere;margin:0}.owner-schema-page{width:min(100% - 32px,1540px)}.owner-schema-board{height:clamp(560px,78dvh,960px)}.owner-schema-toolbar{gap:8px;display:grid}.owner-schema-sections,.owner-schema-tools{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.owner-schema-tools{color:var(--muted);justify-content:space-between;font-size:12px}.owner-schema-tools label{align-items:center;gap:8px;display:flex}.owner-schema-tools select{background:var(--paper);max-width:245px;min-height:32px;color:var(--ink);border:1px solid var(--border);border-radius:6px;padding:4px 6px}.owner-exercise-meta{color:var(--muted);font:500 12px/1.4 var(--mono);margin-top:22px}.owner-attempt{width:min(100% - 44px,1320px)}.owner-attempt>p{max-width:85ch}.owner-attempt-grid{grid-template-columns:minmax(0,1fr) minmax(250px,320px);align-items:start;gap:18px;margin-top:22px;display:grid}.owner-board{border:1px solid var(--border);border-radius:12px;height:clamp(420px,62vh,680px);overflow:hidden}.owner-board-loading{padding:18px}.owner-response-only{max-width:650px;margin-top:22px}.owner-response{background:var(--paper);border:1px solid var(--border);border-radius:10px;justify-items:start;gap:10px;padding:15px;display:grid}.owner-response>label,.owner-options legend{font-size:14px;font-weight:650}.owner-options{border:0;min-width:0;margin:0 0 7px;padding:0}.owner-response textarea{resize:vertical;border:1px solid var(--border);width:100%;min-height:110px;color:var(--ink);background:#fff;border-radius:7px;padding:10px}.owner-answer{background:var(--paper);border:1px solid var(--border);border-radius:10px;margin-top:18px;padding:15px;font-size:14px;line-height:1.55}.owner-answer h2{margin:0 0 5px;font-size:15px}.owner-answer>p{max-width:90ch;margin:0 0 14px}.owner-reference{border:1px solid var(--border);border-radius:8px;height:clamp(360px,56vh,550px);display:flex;overflow:hidden}.owner-attempt-actions{flex-wrap:wrap;align-items:center;gap:10px;display:flex}@media (width<=800px){.owner-attempt-grid{grid-template-columns:minmax(0,1fr)}}@media (width<=580px){.masthead:has(.owner-review-tab) .header-actions{gap:7px}.owner-review-tab{max-width:125px;padding-inline:6px;font-size:11px}.app .header-actions:has(.end-button) .owner-review-tab{display:none}.owner-board{height:440px}.owner-review-toolbar .solution-tabs{padding-inline:5px}.owner-review-toolbar .solution-tabs a{padding-inline:6px;font-size:12px}.owner-guide .owner-reference{height:360px}.owner-guide-schema>div{grid-template-columns:minmax(0,1fr);gap:4px}.owner-schema-board{height:max(570px,78dvh)}.owner-schema-tools select{max-width:198px}}