:root{--hp-gold:var(--gold);--hp-gold-dim:#c8953a;--hp-gold-glow:#f4c43066;--hp-red-dark:#7a0000;--hp-red-mid:#c00;--hp-green-dark:#0d2b0d;--hp-green-mid:#1a4a1a;--hp-green-light:#2e7d32;--hp-silver:#b0bec5;--hp-bg:var(--cosmos);--hp-bg2:#0f0f1e;--hp-sq-light:#c9a86c;--hp-sq-dark:#6b3a2a;--hp-sq-sel:#f4c4308c;--hp-sq-last:#f4c43047;--hp-text-main:#e8d5a3;--hp-text-dim:#8a7a5a;--hp-border:#f4c43040;--sq-size:clamp(44px,9vw,72px)}body.chess-page{background:var(--hp-bg);color:var(--hp-text-main);font-family:var(--font-sans);min-height:100vh;overflow-x:hidden}.chess-header h1,.chess-modal h2,.chess-modal h3{font-family:var(--font-hp-display)}.chess-page{--castle-sky-top:#080418;--castle-sky-mid:#1a0c38;--castle-moon:#fff5d0;--castle-cloud:#fff;--castle-mountain:#150d2a;--castle-stone:#4a3d5c;--castle-stone-dark:#2a1d3c;--castle-glow:#ffd232d9;--castle-mist:#ffe6961f;--castle-fg:#0d0820}body[data-house=b]{--castle-sky-top:#020c08;--castle-sky-mid:#041a10;--castle-stone:#2d4a3a;--castle-stone-dark:#162a1e;--castle-glow:#50ff8cd9;--castle-mist:#50ff8c14;--castle-fg:#050f08}#chess-fx{pointer-events:none;z-index:10;position:fixed;inset:0}#chess-castle{z-index:0;pointer-events:none;position:fixed;inset:0;overflow:hidden}#chess-castle-svg{width:100%;height:260vh;animation:70s ease-in-out infinite alternate castle-pan}@keyframes castle-pan{0%{transform:translateY(-160vh)}to{transform:translateY(0)}}@media not (pointer:fine){#chess-castle-svg{animation-duration:120s}}#chess-app{z-index:1;flex-direction:column;align-items:center;gap:1rem;min-height:100vh;padding:1rem;display:flex;position:relative}.chess-header{text-align:center;border-bottom:1px solid var(--hp-border);width:100%;max-width:960px;padding:.5rem 1rem}.chess-header h1{color:var(--hp-gold);text-shadow:0 0 20px var(--hp-gold-glow), 0 0 40px #f0c04040;letter-spacing:.08em;font-size:clamp(1.4rem,4vw,2.2rem);font-weight:700}.chess-header p{color:var(--hp-text-dim);letter-spacing:.12em;text-transform:uppercase;margin-top:.2rem;font-size:.85rem}.chess-main{flex-wrap:wrap;justify-content:center;align-items:flex-start;gap:1.5rem;width:100%;max-width:960px;display:flex}.chess-board-section{flex-direction:column;align-items:center;gap:.4rem;display:flex}.chess-player-label{font-family:var(--font-body);letter-spacing:.1em;text-transform:uppercase;border-radius:4px;padding:.35rem 1rem;font-size:.9rem;font-weight:700}.chess-player-label--gryffindor{background:linear-gradient(90deg, var(--hp-red-dark), #5a0000);color:var(--hp-gold);border:1px solid var(--hp-gold-dim);box-shadow:0 0 12px #7a000080}.chess-player-label--slytherin{background:linear-gradient(90deg, var(--hp-green-dark), var(--hp-green-mid));color:var(--hp-silver);border:1px solid var(--hp-green-light);box-shadow:0 0 12px #1a4a1a80}.chess-board-wrapper{align-items:center;gap:4px;display:flex}.chess-rank-labels{flex-direction:column;gap:0;display:flex}.chess-rank-labels span{width:18px;height:var(--sq-size);font-family:var(--font-mono);color:var(--hp-text-dim);justify-content:center;align-items:center;font-size:.7rem;display:flex}.chess-file-labels{margin-left:22px;display:flex}.chess-file-labels span{width:var(--sq-size);height:18px;font-family:var(--font-mono);color:var(--hp-text-dim);justify-content:center;align-items:center;font-size:.7rem;display:flex}#chess-board{grid-template-columns:repeat(8, var(--sq-size));grid-template-rows:repeat(8, var(--sq-size));background:var(--hp-sq-dark);border:2px solid var(--hp-gold-dim);contain:layout style;display:grid;box-shadow:0 0 0 4px #0009,0 0 30px #f4c43026,0 8px 32px #000c}.chess-square{width:var(--sq-size);height:var(--sq-size);cursor:pointer;user-select:none;justify-content:center;align-items:center;display:flex;position:relative}.chess-square--light{background:var(--hp-sq-light)}.chess-square--dark{background:var(--hp-sq-dark)}#chess-board[data-house=b]{background:#1e4a2a}#chess-board[data-house=b] .chess-square--light{background:#8aab8a}#chess-board[data-house=b] .chess-square--dark{background:#1e4a2a}.chess-square:hover{filter:brightness(1.12)}.chess-square--selected{background:var(--hp-sq-sel)!important}.chess-square--last{background:var(--hp-sq-last)!important}.chess-square--check:before{content:"";pointer-events:none;background:#c80000;animation:.8s ease-in-out infinite alternate chess-pulse-check;position:absolute;inset:0}@keyframes chess-pulse-check{0%{opacity:.4}to{opacity:.7}}.chess-square--hint:after{content:"";pointer-events:none;background:#0000004d;border-radius:50%;width:32%;height:32%;position:absolute}.chess-square--hint-capture:after{content:"";pointer-events:none;background:0 0;border:4px solid #0000004d;border-radius:50%;position:absolute;inset:4%}.chess-piece{pointer-events:none;z-index:1;justify-content:center;align-items:center;display:flex;position:relative}.chess-piece svg{width:calc(var(--sq-size) * .82);height:calc(var(--sq-size) * .82);display:block}.chess-piece--white{color:var(--hp-gold)}.chess-piece--black{color:#90ee90}#chess-board:not([data-classic]) .chess-piece--white{filter:drop-shadow(-1px -1px #000000e6)drop-shadow(1px -1px #000000e6)drop-shadow(-1px 1px #000000e6)drop-shadow(1px 1px #000000e6)drop-shadow(0 0 6px #f4c43099)drop-shadow(0 2px 4px #000c)}#chess-board:not([data-classic]) .chess-piece--black{filter:drop-shadow(-1px -1px #000000e6)drop-shadow(1px -1px #000000e6)drop-shadow(-1px 1px #000000e6)drop-shadow(1px 1px #000000e6)drop-shadow(0 0 6px #2ec85099)drop-shadow(0 2px 4px #000c)}.chess-piece--classic{font-size:calc(var(--sq-size) * .82);line-height:1;display:block}.chess-panel{flex-direction:column;flex-shrink:0;gap:.8rem;width:260px;display:flex}.chess-panel-card{border:1px solid var(--hp-border);backdrop-filter:blur(4px);background:#0f0a05d9;border-radius:6px;padding:.7rem .9rem}.chess-panel-card h3{font-family:var(--font-body);text-transform:uppercase;letter-spacing:.12em;color:var(--hp-gold-dim);border-bottom:1px solid var(--hp-border);margin-bottom:.5rem;padding-bottom:.35rem;font-size:.75rem}.chess-status{text-align:center;border:1px solid var(--hp-border);background:#0f0a05e6;border-radius:4px;justify-content:center;align-items:center;min-height:2.4rem;padding:.5rem .75rem;font-size:.9rem;display:flex}.chess-status--player{border-color:var(--hp-gold);color:var(--hp-gold);background:#1e1400e6;animation:1.8s ease-in-out infinite chess-player-pulse}@keyframes chess-player-pulse{0%,to{opacity:1}50%{opacity:.5}}.chess-status--check{color:#fa4;background:#3c1400e6;border-color:#c60}.chess-status--checkmate{border-color:var(--hp-red-mid);color:#f66;background:#500000e6}.chess-status--stalemate,.chess-status--draw{color:#aaa;border-color:#666}.chess-status--ai{border-color:var(--hp-green-light);color:#90ee90;background:#001400e6;animation:1.4s ease-in-out infinite chess-ai-pulse}@keyframes chess-ai-pulse{0%,to{opacity:1}50%{opacity:.45}}#chess-board[data-thinking]{opacity:.45;cursor:wait}.chess-status--win{border-color:var(--hp-gold);color:var(--hp-gold);background:#281400e6;animation:1s ease-in-out infinite alternate chess-glow-gold}@keyframes chess-glow-gold{0%{box-shadow:0 0 6px var(--hp-gold-glow)}to{box-shadow:0 0 18px var(--hp-gold-glow)}}#chess-move-history{scrollbar-width:thin;scrollbar-color:var(--hp-gold-dim) transparent;flex-direction:column;gap:2px;max-height:220px;font-size:.75rem;display:flex;overflow-y:auto}.chess-history-entry{color:var(--hp-text-dim);border-radius:3px;padding:3px 6px;line-height:1.4}.chess-history-entry--player{color:var(--hp-gold-dim)}.chess-history-entry--ai{color:#7ec87e}.chess-history-num{color:var(--hp-text-dim);margin-right:4px;font-style:italic}.chess-history-entry--latest{background:#f4c43014}.chess-controls{flex-direction:column;gap:.4rem;display:flex}.chess-controls-row{gap:.5rem;display:flex}.chess-btn{font-family:var(--font-sans);border:1px solid var(--hp-border);cursor:pointer;color:var(--hp-text-main);letter-spacing:.04em;background:#140f05e6;border-radius:4px;flex:1;padding:.45rem .5rem;font-size:.8rem;transition:opacity .1s}.chess-btn:hover{border-color:var(--hp-gold-dim);color:var(--hp-gold);background:#281e0af2}.chess-btn:active{transform:scale(.97)}.chess-btn:disabled{opacity:.4;cursor:not-allowed}.chess-btn--icon{text-align:center;flex:0 0 2.4rem;padding:.45rem 0}.chess-legend{flex-direction:column;gap:5px;display:flex}.chess-legend-item{align-items:center;gap:8px;font-size:.72rem;display:flex}.chess-legend-piece{flex-shrink:0;width:48px;height:48px}.chess-legend-piece--white{color:var(--hp-gold)}.chess-legend-piece--black{color:#90ee90}.chess-legend-names{color:var(--hp-text-main);line-height:1.3;font-family:var(--font-sans)}.chess-legend-role{color:var(--hp-text-dim);font-size:.65rem}.chess-overlay{z-index:100;backdrop-filter:blur(6px);background:#000000e0;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.chess-overlay--hidden{display:none}.chess-modal{border:1px solid var(--hp-gold-dim);text-align:center;background:linear-gradient(160deg,#1a0e04 0%,#0a0a18 100%);border-radius:10px;width:90%;max-width:460px;padding:2rem;box-shadow:0 0 40px #f4c43033,0 20px 60px #000c}.chess-modal h2{color:var(--hp-gold);text-shadow:0 0 16px var(--hp-gold-glow);margin-bottom:.5rem;font-size:1.6rem}.chess-modal h3{color:var(--hp-gold);margin-bottom:1rem;font-size:1.1rem}.chess-modal p{color:var(--hp-text-main);margin-bottom:.6rem;font-size:.9rem;line-height:1.6}.chess-house-row{justify-content:center;gap:1rem;margin:1.2rem 0;display:flex}.chess-house-card{border:2px solid var(--hp-border);cursor:pointer;user-select:none;background:#140f05cc;border-radius:8px;flex:1;max-width:160px;padding:1rem .75rem;transition:opacity .1s}.chess-house-card:hover{border-color:var(--hp-gold-dim)}.chess-house-card--gryffindor.chess-house-card--active{border-color:var(--hp-gold);background:#7a000040;box-shadow:0 0 16px #f4c43040}.chess-house-card--slytherin.chess-house-card--active{border-color:var(--hp-green-light);background:#0d2b0d59;box-shadow:0 0 16px #2e7d3240}.chess-house-icon{margin-bottom:.4rem;font-size:2.4rem;display:block}.chess-house-name{font-family:var(--font-body);font-size:1rem;font-weight:700}.chess-house-role{color:var(--hp-text-dim);margin-top:.2rem;font-size:.72rem}.chess-house-card--gryffindor .chess-house-name{color:var(--hp-gold)}.chess-house-card--slytherin .chess-house-name{color:#90ee90}.chess-modal-section-label{color:var(--hp-text-dim);margin-bottom:.3rem;font-size:.82rem}.chess-diff-row{justify-content:center;gap:.5rem;margin:.75rem 0 1.25rem;display:flex}.chess-diff-pill{border:1px solid var(--hp-border);font-family:var(--font-sans);color:var(--hp-text-main);cursor:pointer;background:#140f05cc;border-radius:20px;padding:.3rem 1rem;font-size:.8rem;transition:opacity .1s}.chess-diff-pill:hover{border-color:var(--hp-gold-dim)}.chess-diff-pill--active{border-color:var(--hp-gold);color:var(--hp-gold);background:#f4c4301f}.chess-begin-btn{font-family:var(--font-body);letter-spacing:.1em;background:linear-gradient(90deg, var(--hp-red-dark), #600);color:var(--hp-gold);border:2px solid var(--hp-gold-dim);cursor:pointer;text-transform:uppercase;border-radius:6px;margin-top:.5rem;padding:.7rem 2rem;font-size:1rem;font-weight:700;transition:transform .1s}.chess-begin-btn:hover{box-shadow:0 0 20px var(--hp-gold-glow);background:linear-gradient(90deg,#900,#800);transform:translateY(-1px)}.chess-begin-btn:disabled{opacity:.45;cursor:not-allowed;box-shadow:none;transform:none}.chess-promo-choices{flex-wrap:wrap;justify-content:center;gap:.75rem;margin-top:1rem;display:flex}.chess-promo-btn{border:2px solid var(--hp-border);width:70px;height:70px;color:var(--hp-gold);cursor:pointer;background:#140f05f2;border-radius:8px;flex-direction:column;justify-content:center;align-items:center;gap:2px;transition:transform .1s;display:flex}.chess-promo-btn:hover{border-color:var(--hp-gold);box-shadow:0 0 12px var(--hp-gold-glow);transform:scale(1.06)}.chess-promo-label{color:var(--hp-text-dim);letter-spacing:.05em;font-size:.58rem;font-family:var(--font-sans)}.chess-promo-svg{width:2.4rem;height:2.4rem;margin:0 auto .25rem;display:block}@media (width<=640px){.chess-main{flex-direction:column;align-items:center}.chess-panel{width:100%;max-width:calc(8 * var(--sq-size) + 22px)}#chess-move-history{max-height:140px}.chess-house-card{padding:.75rem .5rem}}