:root{--bg:#14161b;--panel:#1e2128;--panel-border:#2b2f38;--text:#d8dae0;--text-muted:#8b8f9a;--heading:#f0f1f4;--sq-light:#eceef2;--sq-dark:#a8aeba;--attack:#e5484d;--defense:#46a758;--in-attack:#f76b15;--in-defense:#3b9eff;--contested:#9d5bd2;--hanging:#f5a623;--last-move:#e6a823e6}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font-family:Segoe UI,system-ui,-apple-system,sans-serif;font-size:14px}#root{min-height:100vh}.app{flex-direction:column;max-width:1200px;min-height:100vh;margin:0 auto;padding:16px 20px 8px;display:flex}header{align-items:baseline;gap:14px;margin-bottom:14px;display:flex}header h1{color:var(--heading);letter-spacing:.5px;margin:0;font-size:22px}.tagline{color:var(--text-muted);margin:0;font-size:13px}.intro-link{color:var(--contested);cursor:pointer;text-underline-offset:3px;background:0 0;border:none;margin-left:auto;padding:0;font-size:12px;text-decoration:underline}.intro{background:var(--panel);border:1px solid var(--panel-border);border-left:3px solid var(--contested);color:var(--text);border-radius:8px;margin-bottom:14px;padding:10px 36px 10px 14px;font-size:13px;line-height:1.55;position:relative}.intro p{margin:0 0 8px}.intro p:last-child{margin-bottom:0}.intro em{color:var(--heading);font-style:italic}.c-blue{color:#6ba6f8}.c-red{color:#ff8f93}.c-purple{color:#c08ae6}.intro-close{color:var(--text-muted);cursor:pointer;background:0 0;border:none;padding:2px 6px;font-size:18px;line-height:1;position:absolute;top:6px;right:8px}.intro-close:hover{color:var(--heading)}main{flex:1;align-items:flex-start;gap:18px;display:flex}.board-column{flex-direction:column;flex:1;gap:12px;min-width:0;display:flex}.sidebar{flex-direction:column;flex-shrink:0;gap:12px;width:320px;max-height:calc(100vh - 90px);display:flex;overflow-y:auto}footer{text-align:center;flex-direction:column;align-items:center;gap:6px;padding:10px 0 8px;display:flex}.footer-credit{color:var(--text-muted);align-items:center;gap:8px;font-size:12px;display:inline-flex}.footer-dot{opacity:.6}.bmc-link{color:#fd0;border:1px solid var(--panel-border);background:var(--panel);border-radius:999px;align-items:center;gap:6px;padding:3px 10px;text-decoration:none;transition:border-color .15s,background .15s;display:inline-flex}.bmc-link:hover{background:#262a33;border-color:#fd0}.bmc-link img{height:14px}.board{aspect-ratio:1;-webkit-user-select:none;user-select:none;border-radius:6px;width:100%;max-width:min(680px,100vh - 220px);margin:0 auto;position:relative;overflow:hidden;box-shadow:0 4px 24px #00000073;container-type:inline-size}.board-grid{grid-template-rows:repeat(8,minmax(0,1fr));grid-template-columns:repeat(8,minmax(0,1fr));display:grid;position:absolute;inset:0}.square{justify-content:center;align-items:center;display:flex;position:relative}.square.light{background:var(--sq-light)}.square.dark{background:var(--sq-dark)}.board.flat .square.dark{background:var(--sq-light)}.board.flat .square{box-shadow:inset 0 0 0 1px #5a606e38}.square.last-move:before{content:"";border:3px solid var(--last-move);pointer-events:none;z-index:2;border-radius:2px;position:absolute;inset:0}.square.focus-square:after{content:"";outline-offset:-3px;pointer-events:none;border-radius:3px;outline:3px solid #ffffffbf;position:absolute;inset:0}.square.selected-square:after{outline-color:#ffd75e}.tint{pointer-events:none;position:absolute;inset:0}.pips{pointer-events:none;z-index:2;grid-template-columns:repeat(3,auto);justify-items:start;gap:clamp(1px,.35cqw,2px);display:grid;position:absolute;top:clamp(2px,.5cqw,3px)}.pips i{border-radius:clamp(1px,.3cqw,2px);width:clamp(4px,1.3cqw,6px);height:clamp(4px,1.3cqw,6px);display:block}.pips em{align-self:center;font-size:clamp(6px,1.4cqw,9px);font-style:normal;font-weight:800;line-height:1}.pips-white{left:clamp(2px,.5cqw,3px)}.pips-white i{background:#3b82f6;box-shadow:0 0 0 1px #ffffff8c}.pips-white em{color:#3b82f6}.pips-black{right:clamp(2px,.5cqw,3px)}.pips-black i{background:#e5484d;box-shadow:0 0 0 1px #00000059}.pips-black em{color:#e5484d}.piece{z-index:3;cursor:pointer;font-size:min(7.2vh,46px);line-height:1;position:relative}@supports (font-size:1cqw){.piece{font-size:9.5cqw}}.piece-w{color:#fafafa;text-shadow:0 0 2px #3a3a3a,0 1px 2px #0009}.piece-b{color:#1c1c1e;text-shadow:0 0 2px #ffffff59}.coord{opacity:.7;pointer-events:none;color:#454a56;z-index:2;font-size:10px;font-weight:600;position:absolute}.coord-rank{bottom:1px;left:3px}.coord-file{bottom:1px;right:4px}.piece-ring{pointer-events:none;z-index:2;border-radius:50%;position:absolute;inset:7%}.ring-hanging{border:3px solid var(--hanging);box-shadow:0 0 10px var(--hanging), inset 0 0 8px #f5a62366;animation:1.4s ease-in-out infinite hang-glow}.ring-pressure{border:3px solid var(--in-attack)}.ring-undefended{border:3px dashed #e8d44d}@keyframes hang-glow{0%,to{box-shadow:0 0 6px var(--hanging)}50%{box-shadow:0 0 16px var(--hanging)}}.piece-pulse{pointer-events:none;z-index:2;opacity:0;animation:pulse-in .45s ease-out both, pulse-out .5s ease-in calc(var(--pulse-dur,2.2s) - .5s) both;border-radius:50%;position:absolute;inset:4%}.pulse-attacked{border:4px solid var(--attack)}.pulse-defended{border:4px solid var(--defense)}.pulse-hanging{border:4px solid var(--hanging)}@keyframes pulse-in{0%{transform:scale(.7)}60%{transform:scale(1.06)}to{transform:scale(1)}}@keyframes pulse-out{0%{opacity:.95}to{opacity:0}}.control-flash{pointer-events:none;opacity:0;animation:flash-out .4s ease-out calc(var(--pulse-dur,2.2s) * .75 - .4s) both;border-radius:50%;position:absolute;inset:18%}@keyframes flash-out{0%{opacity:.9}to{opacity:0}}.arrow-fade{animation:arrow-fade-out .5s ease-in calc(var(--pulse-dur,3s) - .5s) both}@keyframes arrow-fade-out{0%{opacity:1}to{opacity:0}}.arrow-layer{pointer-events:none;z-index:4;width:100%;height:100%;position:absolute;inset:0}.board{touch-action:none}.target-dot{pointer-events:none;z-index:2;background:#464b5a59;border-radius:50%;width:24%;height:24%;position:absolute}.target-capture{pointer-events:none;z-index:2;border:3px solid #464b5a73;border-radius:50%;position:absolute;inset:5%}.piece.ghost{opacity:.35}.drag-piece{z-index:10;pointer-events:none;filter:drop-shadow(0 4px 6px #0006);position:absolute;transform:translate(-50%,-55%)}.export-watermark{z-index:30;color:#14161bcc;pointer-events:none;background:#eceef2bf;border-radius:4px;padding:2px 8px;font-size:11px;font-weight:600;display:none;position:absolute;bottom:5px;right:7px}.board.exporting .export-watermark{display:block}.sandbox-banner{background:#9d5bd21f;border:1px solid #9d5bd273;border-radius:8px;justify-content:space-between;align-items:center;gap:10px;width:100%;max-width:min(680px,100vh - 220px);margin:0 auto;padding:7px 12px;font-size:13px;display:flex}.sandbox-banner strong{color:var(--contested)}.sandbox-actions{gap:6px;display:flex}.sandbox-actions button{background:var(--panel);border:1px solid var(--panel-border);color:var(--text);cursor:pointer;border-radius:6px;padding:4px 10px;font-size:12px}.sandbox-actions button:hover{background:#262a33}.move-controls.dimmed{opacity:.45}.promo-overlay{z-index:20;background:#0a0c108c;justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.promo-box{background:var(--panel);border:1px solid var(--panel-border);border-radius:10px;align-items:center;gap:8px;padding:12px 16px;display:flex}.promo-title{color:var(--text-muted);margin-right:4px;font-size:12px}.promo-box button{border:1px solid var(--panel-border);cursor:pointer;background:#262a33;border-radius:8px;padding:4px 10px;font-size:34px;line-height:1}.promo-box button:hover{border-color:var(--contested)}.promo-box button.piece-w{color:#fafafa;text-shadow:0 0 2px #3a3a3a}.promo-box button.piece-b{color:#1c1c1e;text-shadow:0 0 2px #ffffff59}.captured-tray{align-items:center;gap:8px;width:100%;max-width:min(680px,100vh - 220px);min-height:26px;margin:0 auto;padding:0 2px;display:flex}.captured-pieces{align-items:center;line-height:1;display:inline-flex}.captured-glyph{margin-right:-3px;font-size:20px}.captured-pieces.piece-w .captured-glyph{color:#fafafa;text-shadow:0 0 1px #000,0 1px 1px #00000080}.captured-pieces.piece-b .captured-glyph{color:#1c1c1e;text-shadow:0 0 1px #fff6}.captured-adv{color:var(--text-muted);font-variant-numeric:tabular-nums;font-size:13px;font-weight:700}.move-controls{flex-direction:column;gap:6px;width:100%;max-width:min(680px,100vh - 220px);margin:0 auto;display:flex}.mc-buttons{align-items:center;gap:6px;display:flex}.mc-buttons button{background:var(--panel);border:1px solid var(--panel-border);color:var(--text);cursor:pointer;border-radius:6px;padding:5px 12px;font-size:14px}.mc-buttons button:hover:not(:disabled){background:#262a33}.mc-buttons button:disabled{opacity:.35;cursor:default}.play-btn{min-width:44px}.step-btn{font-size:18px;font-weight:700;line-height:1;padding:2px 12px 6px!important}.flip-btn{font-size:15px;line-height:1;padding:4px 10px!important}.move-label{color:var(--heading);min-width:90px;margin-left:10px;font-weight:600}.move-counter{color:var(--text-muted);font-variant-numeric:tabular-nums;margin-left:auto}.scrubber{width:100%;accent-color:var(--contested);cursor:pointer}.panel{background:var(--panel);border:1px solid var(--panel-border);border-radius:8px;padding:12px 14px}.panel h3{text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);margin:0 0 10px;font-size:13px}.muted{color:var(--text-muted)}.toggle-group{margin-bottom:12px}.toggle-group:last-child{margin-bottom:0}.toggle-group-title{color:var(--heading);margin-bottom:5px;font-size:12px;font-weight:600}.toggle{cursor:pointer;align-items:center;gap:7px;padding:2px 0;display:flex}.toggle input{accent-color:var(--contested);cursor:pointer}.swatch{border:1px solid #ffffff40;border-radius:3px;width:11px;height:11px;display:inline-block}.radio-row{gap:12px;margin-bottom:6px;display:flex}.radio{cursor:pointer;align-items:center;gap:5px;display:flex}.radio input{accent-color:var(--contested);cursor:pointer}.slider-row{align-items:center;gap:8px;padding:4px 0 2px;font-size:13px;display:flex}.slider-row input{min-width:0;accent-color:var(--contested);cursor:pointer;flex:1}.slider-row input:disabled{opacity:.35;cursor:default}.slider-value{color:var(--text-muted);font-variant-numeric:tabular-nums;text-align:right;min-width:32px}.info-panel{width:100%;max-width:min(680px,100vh - 220px);min-height:120px;margin:0 auto}.focus-header{color:var(--heading);align-items:center;gap:8px;margin-bottom:8px;display:flex}.piece-inline{font-size:22px;line-height:1}.status-banner{border-radius:6px;margin-bottom:8px;padding:5px 10px;font-size:12px;font-weight:700}.status-hanging{color:var(--hanging);background:#f5a6232e}.status-pressure{color:var(--in-attack);background:#f76b1526}.status-undefended{color:#e8d44d;background:#e8d44d1f}.chips-row{align-items:baseline;gap:8px;margin:5px 0;display:flex}.chips-title{text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);flex-shrink:0;min-width:110px;font-size:11px;font-weight:700}.chips{flex-wrap:wrap;gap:4px;display:flex}.chip{border:1px solid var(--panel-border);background:#262a33;border-radius:5px;padding:2px 8px;font-size:13px}.chip-attack{border-color:var(--attack);color:#ff8f93}.chip-defense{border-color:var(--defense);color:#7ed99a}.chip-in-attack{border-color:var(--in-attack);color:#ffa76b}.chip-in-defense{border-color:var(--in-defense);color:#8ec7ff}.chip-hanging{border-color:var(--hanging);color:var(--hanging)}.chip-motif{color:#f9a8d4;border-color:#ec4899}.chip-discovered{color:#5eead4;border-color:#14b8a6}.chip-neutral{color:var(--text-muted)}.toggle-hint{margin:4px 0 0;font-size:11px;line-height:1.4}.field-label{color:var(--heading);margin:8px 0 4px;font-size:12px;font-weight:600;display:block}.field-label:first-of-type{margin-top:0}select,textarea{width:100%;color:var(--text);border:1px solid var(--panel-border);background:#14161b;border-radius:6px;padding:6px 8px;font-family:inherit;font-size:13px}textarea{resize:vertical}.sample-desc{margin:6px 0 2px;font-size:12px}.load-btn{background:var(--contested);color:#fff;cursor:pointer;border:none;border-radius:6px;margin-top:6px;padding:6px 14px;font-weight:600}.load-btn:disabled{opacity:.4;cursor:default}.load-error{color:var(--attack);margin:6px 0 0;font-size:12px}.move-rows{flex-direction:column;max-height:260px;display:flex;overflow-y:auto}.move-row{grid-template-columns:34px 1fr 1fr;align-items:center;gap:4px;display:grid}.move-num{color:var(--text-muted);font-size:12px}.san{color:var(--text);text-align:left;cursor:pointer;background:0 0;border:none;border-radius:5px;padding:3px 8px;font-family:inherit;font-size:13px}.san:hover{background:#262a33}.san.current{background:var(--contested);color:#fff;font-weight:600}@media (width<=900px){main{flex-direction:column;align-items:stretch}.sidebar{width:100%;max-width:680px;max-height:none;margin:0 auto}}