:root{color-scheme:dark;--bg:#101713;--panel:#19221c;--text:#f1f3e9;--muted:#93a395;--accent:#d1ed94;--border:#2d3a2f;--danger:#ffafa0;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-synthesis:none}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);min-height:100svh}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer;border:0}button:disabled{opacity:.45;cursor:wait}button:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:4px}[hidden]{display:none!important}.app{max-width:490px;margin:auto;padding:calc(22px + env(safe-area-inset-top)) 22px calc(20px + env(safe-area-inset-bottom))}.masthead{display:flex;justify-content:space-between;align-items:center;margin-bottom:38px}.brand{display:flex;align-items:center;color:var(--text);font-weight:750;font-size:19px;letter-spacing:-.8px;text-decoration:none}.brand>span:last-child{font-weight:400;color:var(--accent)}.brand-icon{display:grid;place-items:center;background:var(--accent);color:#1c2a17;width:29px;height:29px;border-radius:9px;font-size:29px;margin-right:9px}.streak{font-size:12px;border:1px solid var(--border);padding:7px 10px;border-radius:30px;color:var(--accent)}.eyebrow{font-size:9px;letter-spacing:2.4px;color:var(--accent);font-weight:700;margin:0 0 13px}h1{font-size:42px;line-height:1.09;letter-spacing:-2px;margin:0;font-weight:600}h1 span{color:var(--accent)}.subtitle{font-size:12px;color:var(--muted);line-height:1.6;margin:14px 0 28px}.daily-heading{display:flex;justify-content:space-between;align-items:center}.daily-heading h2{font-size:14px;font-weight:600;margin:0}.daily-heading>span{font-size:11px;color:var(--muted)}.progress{display:flex;gap:6px;margin:13px 0 24px}.progress button{flex:1;height:4px;min-height:12px;background:transparent;position:relative;padding:0}.progress button:after{content:"";position:absolute;inset:4px 0;background:var(--border);border-radius:10px}.progress button.active:after{background:var(--accent)}.progress button.done:after{background:#6d9d65}.puzzle-meta{display:flex;align-items:center;justify-content:space-between;gap:5px}.badge{font-size:9px;font-weight:700;letter-spacing:1px;color:var(--accent);background:#c8ea9112;padding:7px 9px;border-radius:5px;border:1px solid #c8ea9125}.badge.blunder{color:#ffbb93;background:#ffbb9310;border-color:#ffbb9320}.badge.ghost{color:#cdbdff;background:#cdbdff10;border-color:#cdbdff20}.turn{color:var(--muted);font-size:10px}.opponent{font-size:19px;letter-spacing:-.4px;margin:16px 0 5px;font-weight:550}.context{font-size:12px;color:var(--muted);margin:0 0 19px}#board-frame{padding:5px;background:#2b392e;border-radius:9px;box-shadow:0 12px 35px #0003}#board{width:100%;aspect-ratio:1;position:relative;border-radius:5px;overflow:hidden}cg-board{background-color:#71866c!important;background-image:conic-gradient(#dce4cf 25%,#72876e 0 50%,#dce4cf 0 75%,#72876e 0)!important;background-size:25% 25%!important}cg-board square.last-move{background-color:#e6ef7780!important}.cg-wrap coords{font-size:10px;font-weight:600}.cg-wrap coords.ranks{left:2px;top:0}.cg-wrap coords.files{bottom:0;text-align:right;padding-right:3px}cg-board square.selected{background:#e9f4a180!important}.board-caption{display:flex;align-items:center;justify-content:center;gap:7px;font-size:12px;padding:18px 4px;color:var(--text);min-height:53px}.live-dot{width:5px;height:5px;border-radius:50%;background:var(--accent);flex-shrink:0}.actions{display:flex;gap:9px}.secondary,.primary{padding:13px 16px;border-radius:8px;min-height:44px;font-size:12px;font-weight:600}.secondary{color:var(--text);background:var(--panel);border:1px solid var(--border)}.primary{color:#1c2a17;background:var(--accent)}.actions button{flex:1}.coach{display:flex;justify-content:center;gap:8px;color:var(--accent);background:none;font-size:12px;width:100%;padding:19px 0 11px}.coach span{margin-left:4px}.microcopy{color:var(--muted);font-size:10px;text-align:center;line-height:1.7;margin:5px 0 27px}footer{border-top:1px solid var(--border);padding-top:20px;color:var(--muted);display:flex;align-items:center;gap:6px;font-size:10px}footer>span:last-child{font-size:7px;letter-spacing:1px;margin-left:auto}.footer-mark{font-size:20px;color:var(--accent)}.state-card{text-align:center;padding:30px 18px;background:var(--panel);border:1px solid var(--border);border-radius:12px;margin-bottom:28px}.state-icon{font-size:48px;color:var(--accent)}.state-card h2{font-size:19px}.state-card p{color:var(--muted);font-size:13px;line-height:1.7}.summary{padding:18px;border:1px solid var(--border);background:var(--panel);border-radius:10px;margin-bottom:20px;line-height:1.6;font-size:13px}.summary strong{color:var(--accent)}.error{background:#ffafa010;color:var(--danger);padding:12px;border-radius:8px;font-size:12px;line-height:1.6}dialog{background:var(--panel);border:1px solid var(--border);color:var(--text);border-radius:14px;max-width:90%;padding:22px}dialog::backdrop{background:#0009}dialog h2{font-size:18px}dialog p{font-size:13px;color:var(--muted)}.promotion-options{display:flex;gap:8px;margin:20px 0}.promotion-options button{font-size:38px;border-radius:8px;padding:8px 12px;background:var(--bg);color:var(--text)}.promotion-options small{display:block;font-size:9px}.shake{animation:shake .3s ease-in-out}@keyframes shake{25%,75%{transform:translateX(-5px)}50%{transform:translateX(5px)}}@media(max-width:360px){.app{padding-left:14px;padding-right:14px}h1{font-size:36px}.badge{font-size:8px}.masthead{margin-bottom:25px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}}

.objective{font-size:14px;line-height:1.5;color:var(--accent);margin:0 0 16px}.lesson{padding:16px;background:var(--panel);border:1px solid var(--border);border-radius:10px;margin-bottom:16px;font-size:13px;line-height:1.65}.lesson h3{margin:0;color:var(--accent);font-size:15px}.lesson ol{padding-left:22px}.lesson li{margin:8px 0}#lesson-comparison{color:var(--muted)}

.history-nav{margin-bottom:24px}#history-panel{margin-bottom:24px}#history-panel>p{font-size:13px;color:var(--muted);line-height:1.6}.history-item{padding:12px 0;border-bottom:1px solid var(--border);font-size:13px}.history-item button{margin:0 8px 8px 0}#history-more{margin-top:16px}#replay{margin-top:12px;width:100%}