*{box-sizing:border-box}body{margin:0;background:#101318;color:#ecf0f3;font:15px system-ui,Segoe UI,sans-serif}.shell{max-width:1150px;margin:auto;padding:20px}a{color:#a9cfe1;text-decoration:none}header{margin-bottom:20px}h1{margin:14px 0 4px;font-size:27px}header p,.small{color:#a8b3bf;font-size:13px}.layout{display:grid;grid-template-columns:minmax(0,660px) minmax(260px,350px);gap:16px;align-items:start}.panel{background:#1e242b;border:1px solid #34404c;border-radius:12px;padding:16px;min-width:0}.board-panel{width:100%}.board-header{display:flex;justify-content:space-between;margin-bottom:10px}.board{display:grid;grid-template-columns:repeat(8,1fr);aspect-ratio:1;width:100%;max-width:640px;margin:auto;border:1px solid #5a6670}.square{border:0;padding:0;position:relative;aspect-ratio:1;min-width:0;cursor:pointer;display:flex;align-items:center;justify-content:center;background:var(--sq);color:inherit}.square.selected{outline:3px solid #f7d265;outline-offset:-3px}.square.target::after{content:'';position:absolute;width:24%;aspect-ratio:1;border-radius:50%;background:#163c38aa;pointer-events:none}.square .piece{font-size:clamp(27px,4.5vw,64px);font-family:'Segoe UI Symbol','DejaVu Sans',serif;line-height:1;z-index:1;text-shadow:0 1px 1px #0008}.square .piece.white{color:#fff;text-shadow:0 1px 2px #000,0 0 2px #000}.square .piece.black{color:#101419;text-shadow:0 1px 1px #fff9}.square img{width:92%;height:92%;object-fit:contain;pointer-events:none;z-index:1}.coord{position:absolute;font-size:10px;font-weight:700;z-index:2;pointer-events:none;color:var(--opposite)}.coord.rank{top:2px;left:3px}.coord.file{bottom:2px;right:3px}.feedback{min-height:45px;padding:12px 0;color:#c5d3db}.toolbar,.buttons{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0}button,select{border:1px solid #506171;border-radius:7px;padding:9px 12px;background:#2d3944;color:#f0f2f4;font:inherit;cursor:pointer}button:hover:enabled{background:#405364}button:disabled{opacity:.4;cursor:default}label{display:block;margin:14px 0 8px;color:#bdc9d6}label select{width:100%;display:block;margin-top:6px}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;margin-top:22px}.stats>div{border:1px solid #394854;border-radius:8px;padding:10px 5px;text-align:center}.stats span{display:block;color:#adb9c6;font-size:11px}.stats b{font-size:22px}.seed{color:#b5c1cb;overflow-wrap:anywhere}.promo{border:1px dashed #53616f;border-radius:8px;padding:17px 9px;color:#99a5b3;text-align:center;font-size:12px;margin-top:24px}.settings{background:#151b20;padding:8px 12px;border-radius:8px;border:1px solid #394854}.settings[hidden]{display:none}@media(max-width:750px){.layout{grid-template-columns:1fr}.shell{padding:12px}.panel{padding:10px}.square .piece{font-size:clamp(25px,8vw,56px)}}

/* Etapa 4: tablero de casillas continuas, sin bordes internos ni redondeados. */
.board{gap:0;border:0;border-radius:0;overflow:hidden}
.board>.square{appearance:none;-webkit-appearance:none;border:0!important;border-radius:0!important;margin:0!important;padding:0!important;box-shadow:none;min-width:0;min-height:0;line-height:1;outline:0;background:var(--sq)!important}
.board>.square:hover{background:var(--sq)!important}
.board>.square:focus-visible{outline:2px solid #f7d265;outline-offset:-2px}
.board>.square.selected{outline:3px solid #f7d265;outline-offset:-3px}
.summary{border-top:1px solid #394854;margin-top:15px;padding-top:10px}
.summary[hidden],#clockStats[hidden]{display:none}
#settingsBtn{font-size:18px;padding:7px 13px}
#modeStatus{min-height:18px}

/* Tablero estable: sin salto de scroll ni estilos globales de botones desactivados. */
.board{overflow-anchor:none;grid-template-rows:repeat(8,minmax(0,1fr));}
.board>.square:disabled{opacity:1;cursor:default;}
.board>.square{overflow:hidden;touch-action:manipulation;}
.board>.square img{display:block;width:92%;height:92%;flex:none;}
.board>.square .piece{display:block;flex:none;}

/* Limpieza de panel y resumen flotante (sin publicidad AdSense en modal) */
.extra-stats{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:10px 0 12px}
.extra-stats>div{border:1px solid #394854;border-radius:8px;padding:10px 5px;text-align:center}
.extra-stats span{display:block;font-size:11px;color:#adb9c6}.extra-stats b{font-size:22px}
#continue[hidden],#modeStatus[hidden],#summaryOverlay[hidden],.extra-stats[hidden]{display:none!important}
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.72);z-index:1000;display:flex;align-items:center;justify-content:center;padding:18px}
.summary-modal{background:#1e242b;border:1px solid #4b5a66;border-radius:14px;max-width:510px;width:100%;max-height:90vh;overflow-y:auto;padding:22px;box-shadow:0 18px 65px #0009}
.summary-modal h3{margin-top:0;font-size:21px}.modal-promo{border:1px dashed #53616f;border-radius:8px;padding:16px;text-align:center;color:#a3b0bb;font-size:12px;margin-top:18px}.modal-actions{display:flex;justify-content:flex-end;margin-top:16px}

/* Resumen premium con el personaje real de JereChess. */
.summary-modal{max-width:850px;width:min(850px,96vw);padding:24px;background:linear-gradient(145deg,#111b2b,#15202b 65%,#121923);border:1px solid #42658e;border-radius:20px;color:#edf2f9;box-shadow:0 22px 70px #000c;}
.summary-title{display:flex;align-items:center;justify-content:center;gap:12px;border-bottom:1px solid #435067;padding-bottom:14px;margin-bottom:18px;}
.summary-title h3{margin:0;font-size:clamp(21px,3vw,29px);}
.summary-cap{font-size:24px;color:#e4c27b;}
.summary-layout{display:grid;grid-template-columns:minmax(170px,.85fr) minmax(0,1.65fr);gap:20px;align-items:stretch;}
.summary-mascot{min-width:0;position:relative;display:flex;align-items:end;justify-content:center;overflow:hidden;border-radius:12px;background:radial-gradient(circle at 50% 70%,#28374a 0%,#131c2b 68%);}
.summary-mascot img{display:block;width:100%;max-height:345px;object-fit:contain;object-position:center bottom;mask-image:linear-gradient(to bottom,black 82%,transparent 100%);}
.mascot-speech{position:absolute;top:5px;right:3px;left:3px;margin:0 auto;max-width:215px;border:1px solid #4d77ac;background:#1d304bf2;padding:8px;border-radius:10px;text-align:center;font-size:13px;font-weight:700;z-index:2;}
.summary-results{min-width:0;display:flex;flex-direction:column;gap:9px;}
.summary-reason{font-size:12px;color:#acbacd;margin:0 0 2px;}
.summary-stat-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;}
.summary-stat{background:#19232e;border:1px solid #405060;border-radius:10px;padding:13px;min-height:94px;display:flex;flex-direction:column;justify-content:space-between;gap:7px;}
.summary-stat span{font-size:13px;color:#d1d9e3;}.summary-stat strong{font-size:clamp(22px,3vw,31px);font-variant-numeric:tabular-nums;}
.summary-stat.solved{border-color:#348775}.summary-stat.solved strong{color:#65d5a3}.summary-stat.failed{border-color:#8b4653}.summary-stat.failed strong{color:#ff7888}.summary-stat.precision{border-color:#93794f}.summary-stat.precision strong{color:#f1d28b}.summary-stat.time{border-color:#4674a7}.summary-stat.time strong{color:#a0c9fc}
.summary-solution{width:100%;text-align:center;background:#25405f;border-color:#527fad;padding:12px;margin-top:3px;}
#solutionText:empty{display:none}.summary-modal .modal-promo{margin-top:16px}.summary-modal .modal-actions button{padding:10px 20px;background:#29486b;border-color:#6e9dd4;}
@media(max-width:580px){.summary-modal{padding:14px}.summary-layout{grid-template-columns:1fr;gap:10px}.summary-mascot{min-height:135px;max-height:175px;justify-content:start}.summary-mascot img{max-height:165px;width:44%}.mascot-speech{left:46%;right:6px;top:32%;font-size:12px}.summary-stat{min-height:78px;padding:9px}.summary-stat strong{font-size:23px}.summary-title{margin-bottom:12px}}

/* Ajuste aprobado v4.3.1: mensaje debajo de los pies, nunca sobre la coleta. */
.summary-mascot{flex-direction:column;align-items:center;justify-content:flex-end;gap:0;}
.summary-mascot img{flex:0 1 auto;min-height:0;}
.mascot-speech{position:static;flex:none;inset:auto;max-width:none;width:calc(100% - 16px);margin:0 8px 8px;box-sizing:border-box;font-size:12px;line-height:1.35;padding:8px 6px;}
@media(max-width:580px){
 .summary-mascot{max-height:none;min-height:0;align-items:center;justify-content:flex-end;}
 .summary-mascot img{width:auto;max-width:100%;max-height:165px;}
 .mascot-speech{position:static;inset:auto;width:calc(100% - 16px);margin:0 8px 8px;}
}

/* Aviso de error exclusivo en la casilla de destino: sin mensajes. */
.board>.square.incorrect,.board>.square.incorrect:hover{background:#db4251!important;box-shadow:inset 0 0 0 4px #ff9ca7!important;transition:background .08s linear;}
.review-item{border:1px solid #435568;border-radius:7px;padding:10px;margin-top:7px;background:#1b2838;}
.review-item summary{cursor:pointer;font-size:13px;color:#d6e5f5;}
.review-item p{margin:8px 0 0;font-size:13px;line-height:1.6;overflow-wrap:anywhere;}