:root{--bg-dark: #ECEAE3;--bg-gradient-start: #F5F4F0;--bg-gradient-end: #E4E1D8;--panel-glass: rgba(255, 255, 255, .75);--panel-glass-border: rgba(112, 146, 124, .22);--panel-glass-glow: 0 12px 32px 0 rgba(112, 146, 124, .12);--text-primary: #2C3531;--text-secondary: #4E5E58;--text-muted: #7A8E85;--accent-gold: #B08D2C;--accent-gold-glow: rgba(176, 141, 44, .35);--accent-emerald: #2E7D32;--accent-ruby: #C62828;--sq-light: #F0F0E8;--sq-dark: #70927C;--sq-selected: rgba(176, 141, 44, .3);--sq-highlight: rgba(100, 149, 237, .25);--sq-check: rgba(239, 68, 68, .45);--sq-last-move: rgba(112, 146, 124, .25);--font-display: "Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none}body{font-family:var(--font-body);background:radial-gradient(circle at 50% 50%,var(--bg-gradient-start),var(--bg-gradient-end));color:var(--text-primary);min-height:100vh;min-height:-webkit-fill-available;overflow-x:hidden;display:flex;flex-direction:column}html{height:-webkit-fill-available}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:#70927c14;border-radius:4px}::-webkit-scrollbar-thumb{background:#70927c40;border-radius:4px;transition:background .3s ease}::-webkit-scrollbar-thumb:hover{background:#70927c66}@keyframes pulseGlow{0%,to{box-shadow:0 0 10px var(--sq-check)}50%{box-shadow:0 0 25px #ef4444d9}}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes boardFadeIn{0%{opacity:0;transform:scale(.97)}to{opacity:1;transform:scale(1)}}@keyframes pop{0%{transform:scale(.8)}50%{transform:scale(1.08)}to{transform:scale(1)}}.glass-panel{background:var(--panel-glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--panel-glass-border);box-shadow:var(--panel-glass-glow);border-radius:16px;animation:fadeIn .4s ease-out forwards}.app-container{max-width:1200px;margin:0 auto;padding:16px;width:100%;display:flex;flex-direction:column;align-items:center;flex-grow:1}.game-area{display:grid;grid-template-columns:1fr;gap:24px;width:100%;max-width:950px;margin-top:16px}@media (min-width: 768px){.game-area{grid-template-columns:minmax(360px,500px) 1fr;align-items:start}}.chessboard-container{display:flex;flex-direction:column;align-items:center;width:100%;animation:boardFadeIn .5s cubic-bezier(.16,1,.3,1) forwards}.board-outer-ring{background-color:#f0f0e8;border-radius:4px;border:1px solid #D5D5C4;display:grid;grid-template-columns:24px 1fr 24px;grid-template-rows:24px 1fr 24px;box-shadow:0 20px 50px #00000073;width:100%;max-width:500px;aspect-ratio:1 / 1;transform:translateZ(0)}.border-corner{pointer-events:none}.border-files{display:grid;grid-template-columns:repeat(8,1fr);width:100%;height:100%;align-items:center;justify-items:center;pointer-events:none}.border-ranks{display:grid;grid-template-rows:repeat(8,1fr);width:100%;height:100%;align-items:center;justify-items:center;pointer-events:none}.border-label{font-family:var(--font-body);font-size:11px;font-weight:700;color:#111;text-transform:lowercase}.chessboard{display:grid;grid-template-columns:repeat(8,1fr);grid-template-rows:repeat(8,1fr);width:100%;height:100%;border:2px solid #000000;position:relative}.square{position:relative;aspect-ratio:1 / 1;display:flex;align-items:center;justify-content:center;transition:background-color .2s ease;transform:translateZ(0);backface-visibility:hidden}.square.light{background-color:var(--sq-light)}.square.dark{background-color:var(--sq-dark)}.square.selected{background-color:var(--sq-selected)!important}.square.last-move{background-color:var(--sq-last-move)}.square.check{background-color:var(--sq-check)!important;animation:pulseGlow 1.5s infinite;z-index:10}.move-hint{width:24%;height:24%;background-color:#ffffff80;border-radius:50%;pointer-events:none;box-shadow:0 0 8px #0000004d}.move-hint-capture{position:absolute;top:2px;right:2px;bottom:2px;left:2px;border:4px solid rgba(239,68,68,.5);border-radius:8px;pointer-events:none;box-shadow:inset 0 0 10px #ef444440;z-index:1}.chess-piece{width:92%;height:92%;cursor:grab;z-index:2;transition:transform .1s ease;-webkit-user-select:none;user-select:none;display:flex;align-items:center;justify-content:center;filter:drop-shadow(0 4px 6px rgba(0,0,0,.25))}.chess-piece img{width:100%;height:100%;object-fit:contain;pointer-events:none}.chess-piece:active{cursor:grabbing;transform:scale(1.08)}.chess-piece.dragging{opacity:.8;transform:scale(1.15);z-index:100}.coord{display:none}.captured-tray{display:flex;align-items:center;gap:4px;height:32px;min-height:32px;padding:4px 8px;border-radius:8px;background:#ffffff08;margin:6px 0;width:100%;max-width:500px;overflow-x:auto}.captured-piece{width:20px;height:20px;opacity:.7}.captured-score{font-size:11px;font-weight:600;color:var(--accent-gold);margin-left:auto}.status-bar{display:flex;justify-content:space-between;align-items:center;width:100%;max-width:500px;margin-bottom:10px;padding:8px 12px;border-radius:8px;font-family:var(--font-display);font-weight:600;font-size:14px}.turn-pill{display:flex;align-items:center;gap:8px;padding:4px 10px;border-radius:20px;font-size:12px;transition:all .3s ease}.turn-pill.active{box-shadow:0 0 12px #ffffff1a}.turn-pill.white{background:#fff;color:#000}.turn-pill.black{background:#111;color:#fff;border:1px solid rgba(255,255,255,.2)}.turn-dot{width:8px;height:8px;border-radius:50%}.turn-pill.active .turn-dot{background-color:var(--accent-emerald);box-shadow:0 0 8px var(--accent-emerald)}.sidebar-panel{display:flex;flex-direction:column;gap:16px;width:100%}.controls-card{padding:18px;display:flex;flex-direction:column;gap:12px}.game-code-box{display:flex;align-items:center;background:#0003;border:1px solid rgba(255,255,255,.05);border-radius:8px;padding:6px 12px;gap:10px}.game-code-text{font-family:monospace;font-size:16px;font-weight:700;color:var(--accent-gold);letter-spacing:1px}.copy-btn{background:transparent;border:none;cursor:pointer;color:var(--text-secondary);transition:color .2s ease,transform .1s ease;display:flex;align-items:center;justify-content:center}.copy-btn:hover{color:#fff}.copy-btn:active{transform:scale(.9)}.btn{font-family:var(--font-display);font-weight:600;border-radius:8px;padding:10px 16px;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;font-size:14px;transition:all .2s cubic-bezier(.16,1,.3,1);border:none;outline:none}.btn-primary{background:linear-gradient(135deg,var(--accent-gold),hsl(35,100%,50%));color:#000;box-shadow:0 4px 14px #f59e0b40}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 20px #f59e0b66}.btn-glass{background:#ffffff73;border:1px solid rgba(44,53,49,.12);color:var(--text-primary);box-shadow:0 2px 6px #00000005}.btn-glass:hover{background:#ffffffa6;border-color:#2c353133;transform:translateY(-1px);box-shadow:0 4px 12px #0000000d}.btn-danger{background:#ef44441a;border:1px solid rgba(239,68,68,.2);color:#ff8095}.btn-danger:hover{background:#ef444433;border-color:#ef444459;transform:translateY(-1px)}.btn:active{transform:scale(.97) translateY(0)}.btn-group{display:grid;grid-template-columns:1fr 1fr;gap:10px}.history-card{padding:16px;display:flex;flex-direction:column;height:240px}@media (min-width: 768px){.history-card{height:320px}}.history-header{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid rgba(255,255,255,.05);padding-bottom:10px;margin-bottom:12px}.history-title{font-family:var(--font-display);font-size:15px;font-weight:700}.moves-grid-container{flex-grow:1;overflow-y:auto;padding-right:4px}.moves-grid{display:grid;grid-template-columns:36px 1fr 1fr;row-gap:6px;font-size:13px;color:var(--text-secondary)}.move-num{color:var(--text-muted);font-weight:600}.move-cell{padding:3px 6px;border-radius:4px;cursor:pointer;font-family:monospace;font-size:14px}.move-cell:hover{background:#ffffff0d;color:#fff}.app-header{width:100%;max-width:1168px;display:flex;justify-content:space-between;align-items:center;padding:8px 0 16px;border-bottom:1px solid rgba(255,255,255,.05);margin-bottom:8px}.logo-section{display:flex;align-items:center;gap:1px}.logo-icon{font-size:26px;line-height:1;display:inline-flex;align-items:center;transform:translateY(-2px)}.logo-title{font-family:var(--font-display);font-size:20px;font-weight:800;letter-spacing:-.5px;background:linear-gradient(135deg,var(--text-primary) 40%,var(--accent-gold));-webkit-background-clip:text;-webkit-text-fill-color:transparent}.auth-section{display:flex;align-items:center;gap:12px}.auth-user-pill{display:flex;align-items:center;gap:8px;background:#ffffff0a;border:1px solid rgba(255,255,255,.08);padding:4px 10px;border-radius:20px;font-size:11px}.auth-dot{width:6px;height:6px;border-radius:50%;background-color:var(--accent-emerald)}.auth-dot.anon{background-color:var(--text-muted)}.overlay-screen{position:fixed;top:0;right:0;bottom:0;left:0;background:#eceae3d9;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);z-index:1000;display:flex;align-items:center;justify-content:center;padding:24px}.overlay-modal{max-width:400px;width:100%;padding:30px;text-align:center;animation:fadeIn .3s cubic-bezier(.16,1,.3,1) forwards}.overlay-title{font-family:var(--font-display);font-size:28px;font-weight:800;margin-bottom:12px;background:linear-gradient(135deg,var(--text-primary),var(--accent-gold));-webkit-background-clip:text;-webkit-text-fill-color:transparent}.overlay-desc{font-size:14px;color:var(--text-secondary);line-height:1.5;margin-bottom:24px}.lobby-view{max-width:500px;width:100%;padding:32px;text-align:center;margin-top:10%;display:flex;flex-direction:column;gap:20px}.lobby-hero{font-size:48px;margin-bottom:8px;animation:pop .8s cubic-bezier(.34,1.56,.64,1) forwards}.lobby-title{font-family:var(--font-display);font-size:32px;font-weight:800;background:linear-gradient(135deg,white,var(--accent-gold));-webkit-background-clip:text;-webkit-text-fill-color:transparent}.lobby-desc{color:var(--text-secondary);font-size:14px;line-height:1.6}@media (max-width: 480px){.app-container{padding:12px}.app-header{padding-bottom:12px}.logo-title{font-size:18px}.lobby-title{font-size:26px}.board-outer-ring{padding:4px}}.history-item-hover:hover{background:#ffffff14!important;border-color:#ffffff26!important}.chessboard-container:fullscreen{background:radial-gradient(circle at 50% 50%,var(--bg-gradient-start),var(--bg-gradient-end))!important;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px!important;overflow:auto;width:100vw;height:100vh}.chessboard-container:fullscreen .captured-tray{max-width:600px}.chessboard-container:fullscreen .board-outer-ring{max-width:min(80vw,80vh);max-height:min(80vw,80vh)}.offline-banner{background:var(--accent-ruby);color:#fff;padding:8px 16px;border-radius:8px;width:100%;max-width:1168px;text-align:center;font-weight:600;font-size:13px;margin-bottom:12px;animation:fadeIn .3s ease-out;box-shadow:0 4px 12px #c6282833}.tooltip-container{position:relative;display:inline-block;align-self:center}.tooltip-trigger{background:none;border:none;color:var(--accent-gold);cursor:pointer;font-size:12px;font-weight:600;font-family:var(--font-display);padding:4px 8px;border-radius:4px;transition:opacity .2s;outline:none}.tooltip-trigger:hover{opacity:.85}.tooltip-content{visibility:hidden;position:absolute;bottom:125%;left:50%;transform:translate(-50%);width:270px;padding:16px;border-radius:12px;z-index:100;opacity:0;transition:opacity .2s,transform .2s;text-align:left;pointer-events:none;box-shadow:0 8px 30px #00000026!important}.tooltip-container:hover .tooltip-content{visibility:visible;opacity:1;transform:translate(-50%) translateY(-4px)}.chessboard-container.pseudo-fullscreen{position:fixed!important;top:0!important;left:0!important;width:100vw!important;height:100vh!important;z-index:3000!important;background:radial-gradient(circle at 50% 50%,var(--bg-gradient-start),var(--bg-gradient-end))!important;display:flex!important;flex-direction:column!important;align-items:center!important;justify-content:center!important;padding:16px!important;box-sizing:border-box!important}.chessboard-container.pseudo-fullscreen .board-outer-ring{max-width:90vmin!important;max-height:90vmin!important}.chessboard-container.pseudo-fullscreen button{margin-top:12px}