:root{--text:#6b6375;--text-h:#08060d;--bg:#fff;--border:#e5e4e7;--code-bg:#f4f3ec;--accent:#aa3bff;--accent-bg:#aa3bff1a;--accent-border:#aa3bff80;--social-bg:#f4f3ec80;--shadow:#0000001a 0 10px 15px -3px, #0000000d 0 4px 6px -2px;--sans:system-ui, "Segoe UI", Roboto, sans-serif;--heading:system-ui, "Segoe UI", Roboto, sans-serif;--mono:ui-monospace, Consolas, monospace;font:18px/1.45 var(--sans);letter-spacing:.18px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}}@media (width<=1024px){:root{font-size:16px}}@media (prefers-color-scheme:dark){:root{--text:#9ca3af;--text-h:#f3f4f6;--bg:#16171d;--border:#2e303a;--code-bg:#1f2028;--accent:#c084fc;--accent-bg:#c084fc26;--accent-border:#c084fc80;--social-bg:#2f303a80;--shadow:#0006 0 10px 15px -3px, #00000040 0 4px 6px -2px}#social .button-icon{filter:invert()brightness(2)}}#root{text-align:center;border-inline:1px solid var(--border);box-sizing:border-box;flex-direction:column;width:1126px;max-width:100%;min-height:100svh;margin:0 auto;display:flex}body{margin:0}button,input,select,textarea{font:inherit}h1,h2{font-family:var(--heading);color:var(--text-h);font-weight:500}h1{letter-spacing:-1.68px;margin:32px 0;font-size:56px}@media (width<=1024px){h1{margin:20px 0;font-size:36px}}h2{letter-spacing:-.24px;margin:0 0 8px;font-size:24px;line-height:118%}@media (width<=1024px){h2{font-size:20px}}p{margin:0}code,.counter{font-family:var(--mono);color:var(--text-h);border-radius:4px;display:inline-flex}code{background:var(--code-bg);padding:4px 8px;font-size:15px;line-height:135%}.performance-layout{grid-template-columns:minmax(0,1fr) 250px;align-items:start;gap:18px;display:grid}@media (width<=850px){.performance-layout{grid-template-columns:minmax(0,1fr)}}.workspace-nav{z-index:10;color:#234a3b;text-align:left;background:#fff;border-bottom:1px solid #dbe4de;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;padding:16px 24px;display:flex;position:sticky;top:0}.workspace-home{color:#234a3b;align-items:center;gap:10px;font-size:18px;font-weight:750;text-decoration:none;display:inline-flex}.workspace-home svg{flex-shrink:0}.workspace-nav-links{flex-wrap:wrap;align-items:center;gap:14px;font-size:14px;display:flex}.workspace-nav-links a{color:#234a3b;font-weight:600;text-decoration:none}.workspace-section{color:#68786f;font-size:12px}.workspace-nav a:focus-visible{outline-offset:5px;border-radius:3px;outline:2px solid #285b46}.workspace-nav a:hover{text-decoration:underline}.helpers{text-align:left;color:#233b36;max-width:1160px;margin:24px auto}.helpers *{box-sizing:border-box}.helpers h1{color:#193e34;margin:18px 0;font-size:clamp(32px,5vw,58px);font-weight:650;line-height:1.12}.helpers h2{color:#193e34;font-weight:650}.helpers .eyebrow{letter-spacing:2px;color:#547268;font-size:11px;font-weight:750}.helpers .intro{color:#64756e;max-width:650px;margin-bottom:32px}.helper-cards{grid-template-columns:1fr 1fr;gap:22px;display:grid}.helper-card{color:inherit;background:#fff;border:1px solid #dbe4de;border-radius:22px;flex-direction:column;align-items:flex-start;gap:16px;padding:32px;text-decoration:none;display:flex}.helper-card:hover{border-color:#53836c}.chess-card{background:#e7efe5}.tool-icon{font-size:48px}.helper-card p{color:#5b6b63;line-height:1.7}.helper-card strong{margin-top:14px}.workspace-note{color:#78847d;margin-top:32px;font-size:14px}.coach-layout{grid-template-columns:minmax(280px,1.1fr) minmax(280px,1fr);align-items:start;gap:24px;display:grid}.coach-panel{background:#fff;border:1px solid #dbe4de;border-radius:18px;margin-bottom:18px;padding:22px}.helpers button,.helpers select,.helpers input[type=file]{color:#234a3b;cursor:pointer;background:#f2f6ef;border:1px solid #c9d7cb;border-radius:8px;padding:8px 12px;font-size:14px}.helpers button:disabled{opacity:.5;cursor:wait}.helpers button.active,.helpers .primary{color:#fff;background:#285b46}.helpers textarea{color:#233b36;background:#fff;border:1px solid #c9d7cb;border-radius:8px;width:100%;min-height:100px;margin:10px 0;padding:12px;font-size:14px}.helpers label{margin:12px 0;font-size:14px;display:block}.coach-actions{flex-wrap:wrap;gap:8px;margin:12px 0;display:flex}.chessboard{aspect-ratio:1;border-radius:8px;grid-template-rows:repeat(8,minmax(0,1fr));grid-template-columns:repeat(8,minmax(0,1fr));width:100%;display:grid;overflow:hidden}.square{color:#171f1c;background:#e9eddb;place-items:center;font-family:DejaVu Sans,serif;font-size:clamp(22px,4vw,48px);line-height:1;display:grid;position:relative}.square.dark{background:#7d9b7a}.square.white-piece{color:#fff;text-shadow:0 1px 2px #111,1px 0 #111,-1px 0 #111}.square small{color:#213c2f;text-shadow:none;font:9px system-ui;position:absolute;bottom:2px;left:3px}.move-list{flex-wrap:wrap;gap:5px;max-height:160px;display:flex;overflow:auto}.helpers .muted{color:#65766c;font-size:13px;line-height:1.6}.helpers .notice{background:#f2f4e9;border-radius:8px;margin:12px 0;padding:12px;font-size:14px}.helpers .error{color:#8d3225;background:#ffe9e4}.evidence{border-top:1px solid #e0e6df;padding:14px 0}.evidence blockquote{border-left:3px solid #8aa68c;margin:10px 0;padding-left:12px}.eval-chart{background:#f3f6f0;width:100%;height:80px;margin:12px 0}@media (width<=760px){.helper-cards,.coach-layout{grid-template-columns:1fr}.helper-card{padding:24px}}.helpers .chessboard .square{aspect-ratio:1;color:#171f1c;background:#e9eddb;border:0;border-radius:0;width:100%;min-width:0;height:100%;min-height:0;margin:0;padding:0;font-size:clamp(20px,5vw,52px);line-height:1;overflow:hidden}.helpers .chessboard .square.dark{background:#7d9b7a}.helpers .chessboard .square.white-piece{color:#fff}.chess-piece{pointer-events:none;place-items:center;display:grid;position:absolute;inset:0}.helpers .chessboard .square:disabled{opacity:1;cursor:default}.helpers .chessboard .square.selected{box-shadow:inset 0 0 0 4px #e4b52e}.helpers .chessboard .square.legal-target:after{content:"";pointer-events:none;background:#193e3480;border-radius:50%;width:25%;height:25%;position:absolute}.helpers .chessboard .square:focus-visible{outline-offset:-3px;z-index:1;outline:3px solid #d57d14}.play-panel{max-width:640px;margin:0 auto 24px}.coach-layout>section{min-width:0}@media (width<=760px){.coach-layout{grid-template-columns:minmax(0,1fr)}}.helpers input:not([type=range]):not([type=file]){color:#233b36;background:#fff;border:1px solid #c9d7cb;border-radius:8px;max-width:100%;padding:8px 12px;display:block}.helpers details{margin:14px 0}.helpers summary{cursor:pointer;font-weight:650}.helpers form{margin:16px 0}.rating-control{background:#e7efe5;border-radius:14px;margin:16px 0;padding:20px}.rating-number{margin:10px 0;font-size:36px;display:block}.rating-number small{font-size:14px;font-weight:400}.rating-control input[type=range]{accent-color:#285b46;width:100%}.rating-labels{justify-content:space-between;font-size:13px;display:flex}.quality-spectrum{border-radius:10px;margin:18px 0;display:flex;overflow:hidden}.quality-spectrum>div{color:#fff;text-align:center;flex:1;min-width:0;padding:12px 2px;font-size:11px}.quality-spectrum strong{margin-top:8px;font-size:10px;display:block}.quality-badge{color:#fff;border-radius:8px;padding:4px 10px;font-size:14px;display:inline-block}.quality-counts{flex-wrap:wrap;gap:20px;margin:20px 0;display:flex}.quality-counts>div{gap:5px;display:grid}.quality-counts strong{font-size:28px}.quality-counts span{font-size:12px}.profile-meter{grid-template-columns:100px minmax(0,1fr) 65px;align-items:center;gap:12px;margin:12px 0;font-size:13px;display:grid}.profile-meter meter{width:100%;height:22px}.trend-bars{align-items:end;gap:8px;padding:10px 0;display:flex;overflow-x:auto}.trend-bars button{flex-direction:column;justify-content:end;gap:5px;min-width:55px;height:155px;display:flex}.trend-bars button>span{background:#78a38b;width:100%;min-height:2px}.eval-chart circle{cursor:pointer}.eval-chart circle:focus{stroke:#111;stroke-width:2px;outline:none}