@import"https://fonts.googleapis.com/css2?family=Orbitron:wght@400;500;600;700;900&family=Inter:wght@300;400;500;600;700&display=swap";:root{--color-bg-primary: #05050a;--color-bg-secondary: #0d0d15;--color-bg-tertiary: #15152a;--color-text-primary: #ffffff;--color-text-secondary: #c8c8dc;--color-text-tertiary: #9090b0;--color-player-north: #1a1a1a;--color-player-north-glow: #4a4a4a;--color-player-south: #fefefe;--color-player-south-glow: #ffffff;--color-player-east: #ff2244;--color-player-east-glow: #ff5577;--color-player-west: #2266ff;--color-player-west-glow: #5588ff;--color-accent-gold: #ffcc00;--color-accent-purple: #b066ff;--color-accent-cyan: #00ffdd;--color-accent-pink: #ff00dd;--color-square-light: #f5e8d8;--color-square-dark: #8b7355;--color-square-selected: rgba(255, 204, 0, .7);--color-square-valid: rgba(0, 255, 100, .5);--color-square-check: rgba(255, 50, 50, .7);--glass-bg: rgba(21, 21, 42, .75);--glass-bg-strong: rgba(21, 21, 42, .9);--glass-border: rgba(255, 255, 255, .15);--glass-shadow: 0 12px 48px rgba(0, 0, 0, .5);--gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);--gradient-secondary: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);--gradient-gold: linear-gradient(135deg, #ffd700 0%, #ffed4e 50%, #ff9a56 100%);--gradient-cosmic: linear-gradient(135deg, #1a1a3e 0%, #0f0c29 50%, #302b63 100%);--space-xs: .25rem;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--space-3xl: 4rem;--radius-sm: .5rem;--radius-md: .75rem;--radius-lg: 1.25rem;--radius-xl: 2rem;--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-normal: .3s cubic-bezier(.4, 0, .2, 1);--transition-slow: .5s cubic-bezier(.4, 0, .2, 1);--shadow-sm: 0 4px 12px rgba(0, 0, 0, .15);--shadow-md: 0 8px 24px rgba(0, 0, 0, .25);--shadow-lg: 0 16px 48px rgba(0, 0, 0, .4);--shadow-glow: 0 0 30px rgba(102, 126, 234, .6);--shadow-glow-strong: 0 0 50px rgba(182, 102, 255, .8)}*{margin:0;padding:0;box-sizing:border-box}html,body{min-height:100vh;overflow-x:hidden}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:linear-gradient(135deg,#3a3a3a,#2a2a2a,#1a1a1a);color:var(--color-text-primary);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;position:relative}body:before{content:"";position:fixed;top:0;left:0;width:100%;height:100%;background:radial-gradient(ellipse at 10% 20%,rgba(80,80,80,.08) 0%,transparent 50%),radial-gradient(ellipse at 90% 80%,rgba(100,100,100,.08) 0%,transparent 50%),radial-gradient(ellipse at 50% 50%,rgba(120,120,120,.05) 0%,transparent 60%);pointer-events:none;z-index:-1}body:after{content:"";position:fixed;top:0;left:0;width:100%;height:100%;background-image:radial-gradient(circle at 20% 50%,rgba(255,255,255,.02) 1px,transparent 1px),radial-gradient(circle at 80% 80%,rgba(255,255,255,.02) 1px,transparent 1px);background-size:50px 50px,80px 80px;animation:starsFloat 60s linear infinite;pointer-events:none;z-index:-1}@keyframes cosmicPulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.8;transform:scale(1.1)}}@keyframes starsFloat{0%{background-position:0 0,0 0}to{background-position:500px 500px,-800px -800px}}#root{min-height:100vh;display:flex;flex-direction:column;position:relative}h1,h2,h3,h4,h5,h6{font-family:Orbitron,sans-serif;font-weight:700;line-height:1.2;letter-spacing:.05em;text-transform:uppercase}h1{font-size:3.5rem;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;filter:drop-shadow(0 0 20px rgba(102,126,234,.5));animation:titleGlow 3s ease-in-out infinite}@keyframes titleGlow{0%,to{filter:drop-shadow(0 0 20px rgba(102,126,234,.5))}50%{filter:drop-shadow(0 0 30px rgba(182,102,255,.8))}}h2{font-size:2.5rem;background:var(--gradient-gold);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}h3{font-size:1.75rem}.btn{padding:var(--space-md) var(--space-xl);border:none;border-radius:var(--radius-lg);font-family:Orbitron,sans-serif;font-size:1rem;font-weight:600;text-transform:uppercase;letter-spacing:.1em;cursor:pointer;transition:all var(--transition-normal);position:relative;overflow:hidden;box-shadow:var(--shadow-md)}.btn:before{content:"";position:absolute;top:50%;left:50%;width:0;height:0;border-radius:50%;background:#ffffff4d;transform:translate(-50%,-50%);transition:width var(--transition-slow),height var(--transition-slow)}.btn:hover:before{width:300px;height:300px}.btn-primary{background:var(--gradient-primary);color:#fff;border:2px solid transparent}.btn-primary:hover{box-shadow:var(--shadow-lg),var(--shadow-glow-strong);transform:translateY(-3px) scale(1.05)}.btn-secondary{background:var(--glass-bg-strong);color:var(--color-text-primary);border:2px solid var(--glass-border);-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px)}.btn-secondary:hover{background:#ffffff26;border-color:#ffffff4d;box-shadow:var(--shadow-lg);transform:translateY(-2px)}.card{background:var(--glass-bg);border:2px solid var(--glass-border);border-radius:var(--radius-xl);padding:var(--space-xl);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);box-shadow:var(--glass-shadow);transition:all var(--transition-normal);position:relative;overflow:hidden}.card:before{content:"";position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(135deg,rgba(255,255,255,.1) 0%,transparent 50%);opacity:0;transition:opacity var(--transition-normal)}.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg),0 0 40px #667eea4d;border-color:#ffffff4d}.card:hover:before{opacity:1}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.gap-sm{gap:var(--space-sm)}.gap-md{gap:var(--space-md)}.gap-lg{gap:var(--space-lg)}.text-center{text-align:center}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideIn{0%{opacity:0;transform:translate(-30px)}to{opacity:1;transform:translate(0)}}@keyframes pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.7;transform:scale(.95)}}@keyframes glow{0%,to{box-shadow:0 0 20px #667eea80,0 0 40px #667eea4d}50%{box-shadow:0 0 30px #b666ffb3,0 0 60px #b666ff80}}@keyframes rotate{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.fade-in{animation:fadeIn .6s cubic-bezier(.4,0,.2,1)}.slide-in{animation:slideIn .6s cubic-bezier(.4,0,.2,1)}.spinner{width:50px;height:50px;border:4px solid rgba(255,255,255,.1);border-top-color:var(--color-accent-cyan);border-radius:50%;animation:spin 1s linear infinite,glow 2s ease-in-out infinite}@keyframes spin{to{transform:rotate(360deg)}}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:var(--color-bg-secondary);border-radius:var(--radius-sm)}::-webkit-scrollbar-thumb{background:linear-gradient(135deg,#667eea80,#b666ff80);border-radius:var(--radius-sm);border:2px solid var(--color-bg-secondary)}::-webkit-scrollbar-thumb:hover{background:linear-gradient(135deg,#667eeacc,#b666ffcc)}::selection{background:#667eea80;color:#fff}.difficulty-selector{display:flex;align-items:center;gap:var(--space-md);padding:var(--space-md) var(--space-xl);background:var(--glass-bg-strong);border:2px solid var(--glass-border);border-radius:var(--radius-lg);-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px)}.difficulty-selector label{font-family:Orbitron,sans-serif;font-weight:600;font-size:.9rem;text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-primary)}.difficulty-select{padding:var(--space-sm) var(--space-md);background:#ffffff1a;border:2px solid rgba(255,255,255,.2);border-radius:var(--radius-md);color:var(--color-text-primary);font-family:Orbitron,sans-serif;font-weight:600;font-size:1rem;cursor:pointer;transition:all var(--transition-normal);outline:none}.difficulty-select:hover{background:#ffffff26;border-color:#fff6;box-shadow:0 0 20px #667eea66}.difficulty-select:focus{border-color:var(--color-accent-purple);box-shadow:0 0 25px #b666ff99}.difficulty-select option{background:var(--color-bg-secondary);color:var(--color-text-primary);padding:var(--space-sm)}.camera-hint{margin-top:1rem;padding:.75rem 1.5rem;background:#667eea1a;border:1px solid rgba(102,126,234,.3);border-radius:12px;color:var(--color-accent-blue);font-size:.9rem;font-weight:500;text-align:center;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);animation:hintPulse 3s ease-in-out infinite}@keyframes hintPulse{0%,to{box-shadow:0 0 10px #667eea33}50%{box-shadow:0 0 20px #667eea66}}.app-layout{--bg: #071113;--line: rgba(224, 211, 179, .12);--text: #f6f0e7;--muted: rgba(246, 240, 231, .68);--sand: #ddb46d;--sand-deep: #b9863a;--sky: #79c7ff;min-height:100vh;background:radial-gradient(circle at top left,rgba(221,180,109,.12),transparent 28%),radial-gradient(circle at 85% 8%,rgba(121,199,255,.1),transparent 24%),linear-gradient(180deg,#081012,#091619 52%,#050b0c);color:var(--text);font-family:Space Grotesk,sans-serif;position:relative;overflow-x:hidden}.app-navbar{position:sticky;top:0;z-index:100;background:#081214eb;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid rgba(246,240,231,.08)}.app-navbar-inner{display:flex;align-items:center;gap:.75rem;width:min(1480px,calc(100% - 2rem));margin:0 auto;padding:.65rem 0}.app-hamburger{display:flex;flex-direction:column;gap:4px;background:none;border:none;cursor:pointer;padding:6px;border-radius:8px;transition:background .15s}.app-hamburger:hover{background:#ffffff0f}.app-hamburger-line{display:block;width:20px;height:2px;background:var(--text);border-radius:2px;transition:transform .2s ease,opacity .2s ease}.app-hamburger-line.open:nth-child(1){transform:translateY(6px) rotate(45deg)}.app-hamburger-line.open:nth-child(2){opacity:0}.app-hamburger-line.open:nth-child(3){transform:translateY(-6px) rotate(-45deg)}.app-navbar-logo{background:none;border:none;color:var(--sand);font-family:Sora,sans-serif;font-size:1.15rem;font-weight:700;letter-spacing:-.02em;cursor:pointer;padding:0;white-space:nowrap;transition:opacity .15s ease}.app-navbar-logo:hover{opacity:.8}.app-navbar-links{display:flex;align-items:center;gap:.25rem;margin-left:auto}.app-navbar-link{background:none;border:none;color:#f6f0e7a6;font:inherit;font-size:.88rem;padding:.4rem .75rem;border-radius:999px;cursor:pointer;transition:color .15s ease,background .15s ease}.app-navbar-link:hover{color:var(--text);background:#ffffff0a}.app-navbar-link--active{color:var(--text);background:#ffffff0f}.app-navbar-actions{display:flex;align-items:center;gap:.5rem;flex-shrink:0}.app-navbar-signin{background:transparent;border:1px solid rgba(246,240,231,.15);color:var(--text);border-radius:999px;padding:.4rem .9rem;font:inherit;font-size:.85rem;cursor:pointer;transition:border-color .15s ease}.app-navbar-signin:hover{border-color:#ddb46d73}.app-navbar-create{background:linear-gradient(135deg,#ddb46d,#b9863a);border:none;color:#071113;border-radius:999px;padding:.4rem .9rem;font:inherit;font-size:.85rem;font-weight:700;cursor:pointer;transition:opacity .15s ease}.app-navbar-create:hover{opacity:.88}.app-navbar-avatar{display:flex;align-items:center;gap:.45rem;background:transparent;border:1px solid rgba(246,240,231,.1);color:var(--text);border-radius:999px;padding:.25rem .7rem .25rem .25rem;font:inherit;font-size:.85rem;cursor:pointer;transition:border-color .15s ease}.app-navbar-avatar:hover{border-color:#ddb46d73}.app-navbar-avatar-img,.app-navbar-avatar-letter{width:1.6rem;height:1.6rem;border-radius:50%;object-fit:cover;flex-shrink:0}.app-navbar-avatar-letter{display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#ddb46d,#b9863a);color:#071113;font-weight:700;font-size:.75rem}.app-navbar-avatar-name{max-width:8rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.app-drawer-backdrop{position:fixed;inset:0;z-index:200;background:#0000008c;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);animation:fadeIn .2s ease}.app-drawer{position:fixed;top:0;left:0;bottom:0;z-index:210;width:300px;max-width:85vw;background:linear-gradient(180deg,#0a1519,#060c0e);border-right:1px solid var(--line);padding:1.25rem 1rem;display:flex;flex-direction:column;gap:1rem;transform:translate(-100%);transition:transform .25s cubic-bezier(.4,0,.2,1);overflow-y:auto}.app-drawer--open{transform:translate(0)}.app-drawer-header{display:flex;align-items:center;justify-content:space-between;padding-bottom:.75rem;border-bottom:1px solid var(--line)}.app-drawer-heading{font-size:.68rem;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--sand)}.app-drawer-body{display:flex;flex-direction:column;gap:.25rem}.app-drawer-section{display:flex;flex-direction:column}.app-drawer-parent{display:flex;align-items:center;gap:.5rem;width:100%;padding:.65rem .75rem;border-radius:12px;border:none;background:transparent;color:var(--text);font:inherit;font-size:.9rem;font-weight:600;cursor:pointer;transition:background .15s ease;text-align:left}.app-drawer-parent:hover{background:#ffffff0d}.app-drawer-parent-icon{font-size:.7rem;opacity:.6;width:1rem;flex-shrink:0}.app-drawer-parent-label{font-family:Sora,sans-serif;letter-spacing:-.01em}.app-drawer-children{display:flex;flex-direction:column;gap:2px;margin-left:1.5rem;padding-left:.75rem;border-left:1px solid rgba(255,255,255,.08);overflow:hidden;animation:slideDown .15s ease}@keyframes slideDown{0%{opacity:0;max-height:0}to{opacity:1;max-height:200px}}.app-drawer-child{display:flex;align-items:center;width:100%;padding:.5rem .75rem;border-radius:8px;border:none;background:transparent;color:#f6f0e7a6;font:inherit;font-size:.85rem;cursor:pointer;transition:color .15s ease,background .15s ease;text-align:left}.app-drawer-child:hover{color:var(--text);background:#ffffff0a}.app-drawer-child--active{color:var(--sand);background:#ddb46d14}.app-drawer-divider{height:1px;background:var(--line);margin:.35rem 0}.app-drawer-solo{display:flex;flex-direction:column;align-items:flex-start;gap:.15rem;width:100%;padding:.7rem .75rem;border-radius:12px;border:1px solid transparent;background:transparent;color:var(--text);text-align:left;cursor:pointer;transition:background .15s ease,border-color .15s ease;font:inherit}.app-drawer-solo:hover{background:#ffffff0a;border-color:var(--line)}.app-drawer-solo--active{background:#ffffff0d;border-color:var(--line)}.app-drawer-solo--sky{border-color:#79c7ff33}.app-drawer-solo--sky:hover{border-color:#79c7ff66;background:#79c7ff0a}.app-drawer-solo--sand{border-color:#ddb46d33}.app-drawer-solo--sand:hover{border-color:#ddb46d66;background:#ddb46d0a}.app-drawer-solo strong{font-family:Sora,sans-serif;font-size:.95rem;letter-spacing:-.01em}.app-drawer-solo p{margin:0;font-size:.75rem;line-height:1.4;color:var(--muted)}.app-content{max-width:1480px;margin:0 auto;padding:1.5rem 1.4rem 3rem;position:relative;z-index:1}@media(max-width:820px){.app-navbar-avatar-name{display:none}.app-navbar-avatar{padding:.25rem}}@media(max-width:720px){.app-navbar-links,.app-navbar-create{display:none}}@media(max-width:480px){.app-navbar-inner{gap:.4rem}.app-navbar-avatar-name{display:none}.app-navbar-avatar{padding:.2rem}.app-navbar-avatar-img,.app-navbar-avatar-letter{width:1.4rem;height:1.4rem}}.toast-container{position:fixed;bottom:1.5rem;right:1.5rem;z-index:9999;display:flex;flex-direction:column;gap:.5rem;pointer-events:none}.toast{pointer-events:auto;padding:.7rem 1.2rem;border-radius:8px;font-family:Space Grotesk,sans-serif;font-size:.85rem;line-height:1.4;color:#f6f0e7;background:#071113f2;border:1px solid rgba(255,255,255,.1);box-shadow:0 8px 28px #00000080;animation:toast-in .25s ease-out;max-width:360px}.toast--success{border-left:3px solid #7bd4a4}.toast--error{border-left:3px solid #ef7d63}.toast--info{border-left:3px solid #79c7ff}@keyframes toast-in{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.promotion-modal-overlay{position:fixed;inset:0;background:#000000d9;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:10000;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.promotion-modal{background:linear-gradient(135deg,#2a2a2a,#1a1a1a);border:3px solid #ffd700;border-radius:20px;padding:40px;box-shadow:0 20px 60px #000000e6,0 0 40px #ffd7004d,inset 0 1px #ffffff1a;min-width:500px;animation:slideUp .4s cubic-bezier(.34,1.56,.64,1)}@keyframes slideUp{0%{transform:translateY(50px) scale(.9);opacity:0}to{transform:translateY(0) scale(1);opacity:1}}.promotion-title{color:gold;font-size:2rem;font-weight:700;text-align:center;margin:0 0 15px;text-shadow:0 0 10px rgba(255,215,0,.8),2px 2px 4px rgba(0,0,0,.8)}.promotion-subtitle{color:#e0e0e0;font-size:1.1rem;text-align:center;margin:0 0 30px}.promotion-options{display:grid;grid-template-columns:repeat(4,1fr);gap:15px;margin-bottom:20px}.promotion-option{background:linear-gradient(135deg,#3a3a3a,#2a2a2a);border:2px solid #555;border-radius:12px;padding:20px 10px;cursor:pointer;transition:all .3s cubic-bezier(.34,1.56,.64,1);display:flex;flex-direction:column;align-items:center;gap:10px}.promotion-option:hover{transform:translateY(-8px) scale(1.05);border-color:gold;box-shadow:0 10px 30px #0009,0 0 30px #ffd70066,inset 0 0 20px #ffd7001a}.promotion-option:active{transform:translateY(-4px) scale(1.02)}.promotion-piece-symbol{font-size:4rem;line-height:1;transition:transform .3s ease}.promotion-option:hover .promotion-piece-symbol{transform:scale(1.2) rotateY(15deg)}.promotion-option.player-South .promotion-piece-symbol{color:#fff;text-shadow:2px 2px 0 rgba(200,200,200,.8),4px 4px 8px rgba(0,0,0,.9),0 0 20px rgba(255,255,255,.8)}.promotion-option.player-North .promotion-piece-symbol{color:#2a2a2a;text-shadow:1px 1px 0 #000000,2px 2px 0 rgba(50,50,50,.8),0 0 15px rgba(100,100,100,.5)}.promotion-option.player-East .promotion-piece-symbol{color:#f35;text-shadow:1px 1px 0 #cc0022,2px 2px 0 rgba(200,0,50,.8),0 0 25px rgba(255,50,50,.8)}.promotion-option.player-West .promotion-piece-symbol{color:#37f;text-shadow:1px 1px 0 #1144cc,2px 2px 0 rgba(20,60,200,.6),0 0 25px rgba(50,100,255,.8)}.promotion-piece-name{color:#e0e0e0;font-size:.9rem;font-weight:600;text-transform:uppercase;letter-spacing:1px}.promotion-hint{text-align:center;color:#888;font-size:.9rem;font-style:italic;padding:10px;background:#ffd7000d;border-radius:8px;border:1px solid rgba(255,215,0,.2)}@media(max-width:768px){.promotion-modal{min-width:unset;max-width:90%;padding:30px 20px}.promotion-options{grid-template-columns:repeat(2,1fr);gap:12px}.promotion-piece-symbol{font-size:3rem}.promotion-title{font-size:1.5rem}}@media(max-width:480px){.promotion-modal{padding:20px 15px}.promotion-options{gap:10px}.promotion-piece-symbol{font-size:2.5rem}.promotion-option{padding:15px 8px}}.chess-board-container{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:0;gap:var(--space-xl);min-height:100vh;position:relative}.board-visual-stage{display:flex;flex-direction:column;align-items:center;justify-content:center;width:100%;min-height:0;gap:var(--space-md, 1rem)}.chess-board-container canvas,.chess-board canvas{border:none!important;outline:none!important;box-shadow:none!important}.chess-board-container h1{font-size:1.8rem;margin:0;background:linear-gradient(135deg,#fff,#ccc);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;text-shadow:0 2px 10px rgba(0,0,0,.3);letter-spacing:.1em}.view-toggle-btn{padding:12px 24px;font-size:1rem;font-weight:700;color:#000;background:#fff;border:none;border-radius:100px;cursor:pointer;transition:all .2s ease;box-shadow:0 4px 15px #ffffff1a;font-family:DM 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