:root{--paper:#f6f5f0;--ink:#20352d;--muted:#717971;--green:#244f3e;--line:#e1e4dc;--accent:#dfeabb;--light-square:#e8ebd9;--dark-square:#779481}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:'DM Sans',sans-serif;font-size:14px}button,a,select,textarea{-webkit-tap-highlight-color:transparent}button,select,textarea{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default;opacity:.4}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #d19540;outline-offset:3px}[hidden]{display:none!important}.site-header{height:96px;max-width:1280px;margin:auto;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 36px;gap:24px}.brand{display:flex;gap:11px;align-items:center;font-family:Manrope,sans-serif;font-size:13px;font-weight:800;letter-spacing:1.8px}.brand-mark{font-size:35px;line-height:1;color:var(--green)}.brand-sub{display:block;font-size:8px;letter-spacing:2.35px;font-weight:600;margin-top:4px}.header-note{color:var(--muted);font-size:12px}.lesson-link{font-size:12px;font-weight:700}.lesson-link span{margin-left:14px}main{max-width:1180px;padding:44px 24px 0;margin:auto}.intro{display:flex;justify-content:space-between;align-items:center;margin-bottom:35px}.eyebrow{font-size:10px;font-weight:750;letter-spacing:1.65px;color:#677769;display:flex;gap:8px;align-items:center}.eyebrow>span{height:6px;width:6px;background:#6d9273;border-radius:50%}h1{font-family:Manrope,sans-serif;font-weight:500;letter-spacing:-1.9px;font-size:40px;margin:12px 0}h1 em{font-style:normal;font-weight:800;color:var(--green)}.intro p{color:var(--muted);font-size:13px;margin:0}.intro-badge{display:flex;align-items:center;gap:12px;font-size:12px;line-height:1.7;color:#727b68}.intro-badge>span{font-size:45px;color:#839578}.intro-badge strong{color:var(--ink);font-weight:600}.mode-tabs{border-bottom:1px solid #d5dccf;display:flex;gap:28px;align-items:center;margin-bottom:29px}.mode-tabs button{border:0;background:none;padding:15px 0 17px;color:#758075;font-size:12px;font-weight:600;border-bottom:3px solid transparent;margin-bottom:-1px;white-space:nowrap}.mode-tabs button.active{color:var(--green);border-bottom-color:var(--green)}.mode-tabs button>span{font-size:19px;vertical-align:middle;margin-right:7px}.tabs-note{margin-left:auto;font-size:11px;color:#879082}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 324px;gap:44px;align-items:start}.board-panel{min-width:0;max-width:700px}.player-row{display:flex;gap:11px;align-items:center;padding:0 2px;margin-bottom:13px;min-height:39px}.avatar{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;font-size:27px}.avatar.dark{background:#e3e8dd;color:#314b3b}.avatar.light{background:#fefdf8;border:1px solid #dadfd2;color:#476149}.player-row strong{display:block;font-size:12px;font-weight:650}.player-row div>span{font-size:10px;display:block;margin-top:3px;color:#7c8479}.side-pill{font-size:8px;letter-spacing:1px;background:#e9ece4;border-radius:4px;padding:5px 6px;color:#78836f;margin-left:4px}.thinking{margin-left:auto;font-size:11px}.board-shell{padding:10px;background:#fffef8;box-shadow:0 4px 22px #293b2310;border:1px solid #e2e5d8;border-radius:5px}.board{display:grid;grid-template-columns:repeat(8,1fr);aspect-ratio:1;width:100%;overflow:hidden;border-radius:2px}.square{position:relative;border:0;padding:0;border-radius:0;aspect-ratio:1;display:grid;place-items:center;background:var(--light-square);color:var(--ink);min-width:0}.square.dark{background:var(--dark-square)}.square.last{background:#d7d893}.square.dark.last{background:#b1bb72}.square.selected{background:#e9ce75}.square.check{background:#ce8571}.square.hint-square{box-shadow:inset 0 0 0 4px #dfac50}.piece{width:82%;height:82%;position:relative;z-index:2;filter:drop-shadow(0 2px 1px #172b3433);pointer-events:none}.coord{position:absolute;z-index:3;font-size:10px;font-weight:650;line-height:1;color:#52694c;pointer-events:none}.dark .coord{color:#f3f3e1}.coord.rank{top:4px;left:5px}.coord.file{bottom:3px;right:5px}.legal:after{content:'';position:absolute;inset:37%;border-radius:50%;background:#263f3940;z-index:3;pointer-events:none}.legal.occupied:after{inset:4%;border:5px solid #244b3e75;background:none}.bottom-player{margin-top:16px;margin-bottom:16px}.board-toolbar{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:8px 0}.turn-status{display:flex;align-items:center;gap:9px;font-size:12px;font-weight:600}.turn-status i{height:8px;width:8px;border-radius:50%;background:#6f9271}.icon-button{border:0;background:none;font-size:22px;width:38px;height:33px;color:#6e7d6e;border-radius:5px}.icon-button:hover,.icon-button[aria-pressed=true]{background:#e3e9d9;color:#234e38}.board-help{font-size:10px;color:#899082;display:flex;justify-content:space-between;margin-top:13px}.sidebar{display:flex;flex-direction:column;gap:17px}.card{background:#fffefb;border:1px solid var(--line);border-radius:10px;padding:22px}.card-heading{display:flex;justify-content:space-between;align-items:center}.card-heading .eyebrow{font-size:9px}.small-icon{font-size:18px;color:#79836e}h2{font-family:Manrope,sans-serif;font-size:20px;letter-spacing:-.6px;font-weight:750;margin:10px 0}.setup-card>p{font-size:11px;line-height:1.7;color:var(--muted);margin:8px 0 20px}.field-label{display:block;font-size:10px;font-weight:650;margin:19px 0 8px}select,textarea{border:1px solid #dfe3d8;background:#fffefb;border-radius:6px;width:100%;padding:11px 10px;color:#475442;font-size:11px}textarea{resize:vertical;line-height:1.6}.segmented{display:flex;border:1px solid #dfe3d8;border-radius:6px;overflow:hidden;padding:3px;gap:4px}.segmented button{width:50%;border:0;background:none;padding:8px;border-radius:4px;color:#7a8374;font-size:12px}.segmented button.selected{background:#e8eddf;color:#264d38;font-weight:700}.primary,.secondary{border:0;border-radius:6px;padding:12px 15px;font-weight:600;font-size:11px}.primary{background:var(--green);color:white}.primary:hover{background:#183d2d}.secondary{background:#ebeee5;color:#38533e}.full{width:100%;margin-top:16px}.primary.full{display:flex;justify-content:space-between;align-items:center}.primary.full>span{font-size:17px}#message{margin:12px 0 0;color:#37643e;font-size:11px;line-height:1.5}#message:empty{display:none}.coach-card{padding:20px 22px;border-radius:10px;background:#eaf0df;border:1px solid #dfe6d2}.coach-label{font-size:9px;font-weight:700;letter-spacing:1.3px;color:#587344;display:flex;align-items:center;gap:8px}.coach-label>span{font-size:21px}.coach-card p{font-size:13px;line-height:1.7;color:#5a6b50;margin:9px 0 12px}.coach-card strong{color:#344d33;font-weight:600}.coach-card button{display:flex;justify-content:space-between;width:100%;border:0;background:transparent;border-top:1px solid #d6e0c7;padding:12px 0 0;font-size:11px;font-weight:650;color:#36532e}.moves-card{padding:0;overflow:hidden}.moves-header{display:flex;justify-content:space-between;align-items:center;padding:16px 18px}.moves-header h3{margin:0;font-size:12px;font-weight:650}.moves-header button{border:0;background:none;color:#7a8672;font-size:9px;padding:4px 0}.move-labels,.move-row{display:grid;grid-template-columns:34px 1fr 1fr;gap:5px;padding:9px 18px;font-size:11px}.move-labels{background:#f0f2ea;color:#929b87;font-size:9px}.move-row:nth-child(even){background:#f7f8f2}.move-row>span:first-child{color:#929a88}.move-row>span{font-variant-numeric:tabular-nums}.moves{min-height:66px;max-height:156px;overflow:auto}.empty-moves{font-size:10px;color:#99a18d;text-align:center;padding:26px 10px}.puzzle-meta{display:flex;justify-content:space-between;background:#f0f2e9;padding:9px;border-radius:5px;font-size:9px;font-weight:700;letter-spacing:.5px;margin-top:16px}#puzzle-prompt{font-size:12px;line-height:1.7}.puzzle-progress{display:flex;gap:5px}.puzzle-progress button{height:7px;flex:1;border:0;border-radius:4px;background:#dce2d3;padding:0}.puzzle-progress button.current{background:#a6b780}.puzzle-progress button.done{background:#486f48}.puzzle-nav{display:flex;gap:8px;margin-top:18px}.puzzle-nav button{flex:1;padding:11px 8px}footer{display:flex;justify-content:space-between;border-top:1px solid var(--line);margin-top:35px;padding:23px 0 28px;font-size:10px;color:#939989}footer strong{font-weight:600;color:#6e7d65}dialog{border:1px solid var(--line);background:var(--paper);border-radius:14px;padding:28px;max-width:380px;width:90%;color:var(--ink);box-shadow:0 20px 90px #0b21184a}dialog::backdrop{background:#122c2766;backdrop-filter:blur(3px)}dialog p{font-size:13px;line-height:1.7;color:var(--muted)}#promotion-options{display:flex;gap:8px;margin-top:20px}#promotion-options button{width:25%;border:1px solid var(--line);background:#e6ecda;border-radius:8px;aspect-ratio:1;padding:4px}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:20px}@media(min-width:1450px){main{padding-top:50px}.workspace{gap:55px;grid-template-columns:minmax(0,1fr) 345px}}@media(max-width:900px){.workspace{grid-template-columns:minmax(0,1fr) 285px;gap:24px}.site-header{padding:0 24px}.header-note{display:none}h1{font-size:33px}.intro-badge{display:none}.tabs-note{display:none}.mode-tabs{gap:25px}.card{padding:18px}.moves-card{padding:0}.board-help span{display:none}.side-pill{display:none}}@media(max-width:690px){.site-header{height:75px;padding:0 18px}.brand{font-size:11px}.brand-sub{font-size:7px}main{padding:28px 16px 0}.intro{margin-bottom:20px}h1{font-size:31px;letter-spacing:-1.4px}.intro p{font-size:12px;line-height:1.6;max-width:300px}.eyebrow{font-size:9px}.mode-tabs{gap:0;justify-content:space-between;margin-bottom:23px}.mode-tabs button{font-size:10px;padding-bottom:13px}.mode-tabs button>span{font-size:15px;margin-right:3px}.workspace{grid-template-columns:1fr;gap:20px}.sidebar{display:grid;grid-template-columns:1fr}.board-shell{padding:7px}.player-row div>span{font-size:10px}.board-help{font-size:10px}.board-help span{display:block}.sidebar .setup-card{order:0}.sidebar .coach-card{order:1}.moves-card{order:2}.coord{font-size:9px}.intro-badge{display:none}footer{margin-top:25px;gap:15px;line-height:1.7}footer>span:last-child{display:none}.lesson-link{font-size:10px}.lesson-link span{margin-left:4px}}@media(prefers-reduced-motion:no-preference){button{transition:background .14s,color .14s}.thinking span{animation:pulse 1s infinite}@keyframes pulse{50%{opacity:.2}}}

/* Coaching website palette */
:root{--paper:#fafafa;--ink:#1f2937;--muted:#6b7280;--green:#1e3a8a;--line:#e1e5ed;--accent:#dbeafe;--light-square:#edf1f7;--dark-square:#849bb5}
.coach-card{background:#eef2ff;border-color:#dbe3fc}.coach-label,.coach-card p{color:#526580}.coach-card strong,.coach-card button{color:#1e3a8a}.coach-card button{border-color:#d7dff2}
.avatar.dark,.side-pill{background:#e7edf6;color:#526780}.segmented button.selected{background:#e8eefb;color:#1e3a8a}.primary:hover{background:#1e40af}.coord{color:#526780}.dark .coord{color:#f8fafc}.secondary{background:#e8edf5;color:#385378}

/* Maia3 controls */
input[type=range]{width:100%;accent-color:#1e3a8a;min-height:32px;cursor:pointer}
input:focus-visible{outline:3px solid #d19540;outline-offset:3px}
.rating-label{display:flex;align-items:center;justify-content:space-between}
#rating-value{font-size:22px;color:#1e3a8a;font-weight:750;font-variant-numeric:tabular-nums}
.rating-endpoints{display:flex;justify-content:space-between;color:#526580;font-size:10px}
.rating-help{font-size:11px;line-height:1.6;color:#526580;margin:10px 0}
footer a{text-decoration:underline;text-underline-offset:3px}