:root{--bg-dark: #161512;--bg-card: #262421;--bg-card-border: #363431;--primary-green: #81b64c;--primary-green-hover: #a3d162;--danger-red: #cc3333;--text-main: #e2e2e2;--text-muted: #8b8987;--board-light: #eeeed2;--board-dark: #769656;--board-highlight: rgba(245, 180, 50, .55);--board-lastmove: rgba(129, 182, 76, .45);--font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-dark);color:var(--text-main);font-family:var(--font-family);min-height:100vh;overflow-x:hidden}button{font-family:inherit;cursor:pointer;border:none;outline:none;transition:background .15s ease,transform .1s ease}.glass-panel{background:var(--bg-card);border:1px solid var(--bg-card-border);border-radius:8px;box-shadow:0 4px 16px #0006}.btn-primary{background:var(--primary-green);color:#fff;font-weight:700;font-size:1.1rem;padding:.85rem 1.75rem;border-radius:6px;border-bottom:3px solid #5d8a32;display:inline-flex;align-items:center;justify-content:center;gap:.5rem}.btn-primary:hover{background:var(--primary-green-hover)}.btn-primary:active{transform:translateY(1px);border-bottom-width:1px}.btn-danger{background:#cc333326;color:#ef4444;border:1px solid rgba(204,51,51,.3);font-weight:600;padding:.6rem 1.2rem;border-radius:6px}.btn-danger:hover{background:var(--danger-red);color:#fff}.btn-secondary{background:#363431;color:#e2e2e2;border:1px solid #45423e;font-weight:600;padding:.6rem 1.2rem;border-radius:6px}.btn-secondary:hover{background:#45423e}.radar-container{position:relative;width:120px;height:120px;margin:0 auto;display:flex;align-items:center;justify-content:center}.radar-circle{position:absolute;border:2px solid rgba(129,182,76,.35);border-radius:50%;animation:radarPulse 2s infinite ease-out}.radar-circle:nth-child(1){width:100%;height:100%;animation-delay:0s}.radar-circle:nth-child(2){width:70%;height:70%;animation-delay:.5s}.radar-circle:nth-child(3){width:40%;height:40%;animation-delay:1s}@keyframes radarPulse{0%{transform:scale(.6);opacity:1}to{transform:scale(1.3);opacity:0}}.chessboard-wrapper{width:100%;max-width:580px;aspect-ratio:1 / 1;display:grid;grid-template-columns:repeat(8,1fr);grid-template-rows:repeat(8,1fr);border-radius:6px;overflow:hidden;box-shadow:0 8px 24px #000000b3;border:3px solid #262421;-webkit-user-select:none;user-select:none}.chess-square{position:relative;display:flex;align-items:center;justify-content:center;cursor:pointer}.chess-square.light{background-color:var(--board-light);color:var(--board-dark)}.chess-square.dark{background-color:var(--board-dark);color:var(--board-light)}.chess-square.selected{background-color:var(--board-highlight)!important}.chess-square.last-move{background-color:var(--board-lastmove)!important}.chess-square.in-check{background-color:#cc3333b3!important}.legal-dot{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:26%;height:26%;background:#00000040;border-radius:50%;pointer-events:none;z-index:2}.legal-capture-ring{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:84%;height:84%;border:4px solid rgba(0,0,0,.25);border-radius:50%;pointer-events:none;z-index:2;box-sizing:border-box}.coord-rank{position:absolute;top:2px;left:3px;font-size:.75rem;font-weight:700;pointer-events:none;z-index:3}.coord-file{position:absolute;bottom:1px;right:3px;font-size:.75rem;font-weight:700;pointer-events:none;z-index:3}.chess-piece-img{position:relative;width:90%;height:90%;object-fit:contain;z-index:1}.chess-piece-img:hover{transform:scale(1.04)}.modal-overlay{position:fixed;top:0;left:0;width:100vw;height:100vh;background:#000000bf;display:flex;align-items:center;justify-content:center;z-index:1000;padding:1rem}.animate-fadeIn{animation:fadeIn .2s ease-out forwards}@keyframes fadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}