:root{--font-body: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;--font-heading: var(--font-body);--font-explanation: "Helvetica Neue", Helvetica, Arial, sans-serif;--font-notation: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;--navy-950: #0d131d;--navy-900: #111722;--navy-800: #162232;--navy-700: #1c2a3d;--navy-600: #24344a;--navy-line: #2a3545;--ivory: #f4efe4;--ivory-2: #e9e1d2;--ivory-muted: #b9b2a4;--slate: #9ca9b8;--gold: #d7ad62;--gold-strong: #e2bd77;--gold-rgb: 215, 173, 98;--gold-soft: rgba(var(--gold-rgb), .14);--success: #8db38a;--success-soft: rgba(141, 179, 138, .14);--danger: #d08a7e;--danger-soft: rgba(208, 138, 126, .14);--bg-primary: var(--navy-900);--bg-secondary: var(--navy-800);--bg-card: var(--navy-800);--bg-raised: var(--navy-700);--bg-glass: var(--navy-800);--text-primary: var(--ivory);--text-secondary: var(--slate);--text-accent: var(--gold);--border-color: var(--navy-line);--border-hover: rgba(var(--gold-rgb), .45);--radius: 10px;--shadow-soft: 0 6px 20px rgba(0, 0, 0, .25);--shadow-strong: 0 12px 32px rgba(0, 0, 0, .35);--primary-electric: var(--gold);--electric-blue: var(--gold);--primary-purple: var(--gold);--accent-magenta: var(--gold);--secondary-accent: var(--gold);--neon-glow: none;--neon-glow-soft: none;--gradient-text: none;--gradient-bg: var(--navy-900);color-scheme:dark}html,body{width:100%;margin:0;padding:0;background-color:var(--bg-primary);color:var(--text-primary);font-family:var(--font-body);overflow-x:hidden;line-height:1.6;-webkit-font-smoothing:antialiased}a{font-weight:500;color:var(--gold);text-decoration:none;transition:color .15s ease}a:hover{color:var(--gold-strong)}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);font-weight:700;color:var(--ivory);line-height:1.25}button{font-family:var(--font-body);border-radius:8px;border:1px solid var(--gold);padding:.7em 1.4em;font-size:1rem;font-weight:600;background-color:transparent;color:var(--gold);cursor:pointer;transition:background-color .15s ease,color .15s ease,border-color .15s ease}button:hover{background-color:var(--gold);color:var(--navy-900)}button:focus-visible,a:focus-visible{outline:2px solid var(--gold);outline-offset:2px}*{margin:0;padding:0;box-sizing:border-box}html,body{width:100%;margin:0;padding:0;overflow-x:hidden}#root{width:100%!important;max-width:none!important;margin:0;padding:0;display:block}.page-content{position:relative;z-index:1;padding:140px 5% 60px}.container{display:flex;flex-direction:row;width:90%!important;max-width:1400px!important;min-height:60vh;margin:100px auto;background:var(--bg-card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-soft);border:1px solid var(--border-color)}.image-section{flex:1.2;background:var(--navy-950);display:flex;align-items:center;justify-content:center;padding:40px;position:relative}.image-section img{width:100%;max-width:800px;height:auto;border-radius:8px}.text-section{flex:1;padding:60px;display:flex;flex-direction:column;justify-content:center;text-align:left;animation:fadeIn 1.5s ease-in}.text-section h1{font-size:48px;margin-bottom:20px;font-weight:700;line-height:1.2;color:var(--ivory)}.text-section p{font-size:20px;margin-bottom:30px;color:var(--slate)}.ButtonElements{display:flex;flex-wrap:wrap;gap:15px;margin-bottom:20px;justify-content:center}.ButtonElements button{min-width:180px}@media(max-width:1024px){.container{width:95%}}@media(max-width:768px){.container{flex-direction:column;margin:20px auto;width:90%}.text-section{text-align:center;padding:30px}.text-section button{align-self:center}}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.app-body{display:flex;align-items:flex-start}.app-main{position:relative;z-index:1;flex:1;min-width:0}.page-container{padding-top:96px}.section-title{font-size:2rem;font-weight:700;margin-bottom:16px;color:var(--ivory)}.glass-depth{position:relative;border-radius:var(--radius);padding:10px;background:var(--bg-card);border:1px solid var(--border-color);overflow:hidden}.gradient-text-blue{color:var(--gold)}.stat-label{font-size:.85rem;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.08em}.ambient-glow{display:none}.nav-container{position:fixed;top:0;left:0;width:100%;height:68px;padding:0 32px;display:flex;align-items:center;background:var(--navy-800);border-bottom:1px solid var(--navy-line);transition:transform .25s ease,box-shadow .25s ease;z-index:1000}.nav-container.scrolled{box-shadow:0 6px 18px #0000004d}.nav-container.hidden{transform:translateY(-100%)}.nav-content{width:100%;max-width:1400px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:24px}.nav-logo{display:flex;align-items:center;gap:10px;white-space:nowrap;text-decoration:none}.nav-logo-mark{width:42px;height:42px;overflow:hidden;flex-shrink:0;border-radius:10px}.nav-logo-mark img{display:block;width:47px;margin:-1px 0 0 -2.5px}.nav-logo-text{font-size:1.35rem;font-weight:700;letter-spacing:.01em;color:var(--ivory)}.nav-logo-text span{color:var(--gold)}.nav-logo:hover .nav-logo-text{color:var(--ivory)}nav{display:flex;align-items:center;gap:26px}nav a.nav-item,nav button.nav-item{color:var(--ivory-2);font-family:var(--font-body);font-size:.98rem;font-weight:500;text-decoration:none;transition:color .15s ease}nav a.nav-item:hover{color:var(--gold)}nav button.nav-energy{padding:4px 10px;border-color:var(--navy-line);color:var(--gold);background:transparent}nav button.nav-energy:hover{background:var(--gold-soft);color:var(--gold)}.nav-btn-outline{border:1px solid var(--ivory-muted);padding:7px 20px;border-radius:8px;color:var(--ivory);font-weight:600;transition:border-color .15s ease,color .15s ease}.nav-btn-outline:hover{border-color:var(--gold);color:var(--gold)}.nav-btn-solid{background:var(--gold);border:1px solid var(--gold);padding:7px 20px;border-radius:8px;color:var(--navy-900);font-weight:700}.nav-btn-solid:hover{background:var(--gold-strong);border-color:var(--gold-strong);color:var(--navy-900)}@media(max-width:760px){.nav-container{padding:0 16px}nav{gap:14px}nav a.nav-item{font-size:.9rem}.nav-logo-text{font-size:1.1rem}}@media(max-width:600px){.nav-logo-text{display:none}.nav-content{gap:12px}nav{gap:12px;overflow-x:auto;scrollbar-width:none}nav a.nav-item{white-space:nowrap}.nav-btn-outline,.nav-btn-solid{padding:6px 12px;white-space:nowrap}}.missions-container{padding:40px;background:rgba(var(--gold-rgb),.05);border-radius:40px;width:100%;max-width:1000px;margin:0 auto}.missions-header{margin-bottom:30px}.missions-header h3{font-size:2.5rem;font-weight:800;color:var(--ivory);margin-bottom:4px}.missions-header p{color:var(--text-secondary);font-size:1.1rem;margin-bottom:10px}.streak-badge{display:flex;align-items:center;gap:10px;background:#1c2a3d45;padding:8px 16px;border-radius:100px;border:3px solid rgba(var(--gold-rgb),.33);box-shadow:0 4px 15px #0000001a}.fire-icon{font-size:1.5rem;animation:flicker 1.2s infinite alternate}.streak-count{font-weight:900;color:var(--gold);font-size:1.4rem;font-family:Space Mono,monospace}@keyframes flicker{0%{transform:scale(1);filter:drop-shadow(0 0 2px #d08a7e)}to{transform:scale(1.2);filter:drop-shadow(0 0 10px #d08a7e)}}.history-timeline{display:flex;justify-content:space-between;padding:15px 0;border-top:1px solid rgba(255,255,255,.05);margin-top:15px}.history-day{display:flex;flex-direction:column;align-items:center;gap:8px}.history-dot{width:32px;height:32px;border-radius:50%;border:2px solid rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center;font-size:12px;color:transparent;transition:all .4s cubic-bezier(.16,1,.3,1);background:#ffffff05}.history-dot.done{background:#8db38a;border-color:#8db38a;color:#fff;box-shadow:none}.history-dot.today{border-color:var(--gold);border-style:dashed}.day-label{font-size:11px;color:#9ca9b8;text-transform:uppercase;font-weight:700;letter-spacing:1px}.missions-list{display:flex;flex-direction:column;gap:20px}.mission-card{display:flex;align-items:center;gap:25px;padding:25px;background:#ffffff08;border:1px solid rgba(255,255,255,.05);border-radius:24px;cursor:pointer;transition:all .3s ease}.mission-card:hover{background:rgba(var(--gold-rgb),.1);border-color:rgba(var(--gold-rgb),.3)}.mission-card.completed{border-color:#8db38a4d;background:#8db38a0d}.mission-icon{font-size:2rem;width:60px;height:60px;display:flex;align-items:center;justify-content:center;background:#ffffff0d;border-radius:16px}.mission-info{flex:1}.mission-info h4{font-size:1.3rem;font-weight:700;color:#fff;margin-bottom:8px}.mission-info p{font-size:.95rem;color:#9ca9b8;margin-bottom:15px}.progress-bar-container{width:100%;height:6px;background:#ffffff0d;border-radius:10px;overflow:hidden}.progress-bar-fill{height:100%;background:var(--gold);transition:width .6s cubic-bezier(.16,1,.3,1)}.mission-card.completed .progress-bar-fill{background:#8db38a}.mission-status{width:80px;display:flex;justify-content:center}.mission-status .count{font-weight:700;color:var(--primary-green);font-family:Space Mono,monospace;font-size:1.2rem}.mission-status .check{color:#8db38a;font-size:1.5rem;font-weight:900}.mission-history-btn{background:#ffffff0d;border:1px solid rgba(255,255,255,.1);color:#888;padding:8px 16px;border-radius:100px;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1px;cursor:pointer;transition:all .3s ease}.mission-history-btn:hover{background:#ffffff1a;color:#fff;border-color:#fff3}.mission-history-modal-overlay{position:fixed;inset:0;background:#000000d9;z-index:2000;display:flex;align-items:center;justify-content:center;padding:20px}.mission-history-modal{width:100%;max-width:500px;background:var(--navy-900);border:1px solid rgba(255,255,255,.1);border-radius:30px;padding:40px;position:relative;box-shadow:0 30px 60px #000c}.mission-history-modal h3{font-size:1.8rem;font-weight:800;color:#fff;margin-bottom:25px;text-align:center}.close-modal{position:absolute;top:20px;right:20px;background:none;border:none;color:#555;font-size:24px;cursor:pointer;transition:color .3s}.close-modal:hover{color:#fff}.history-grid{max-height:400px;overflow-y:auto;display:flex;flex-direction:column;gap:12px;padding-right:10px}.history-grid::-webkit-scrollbar{width:4px}.history-grid::-webkit-scrollbar-thumb{background:#ffffff1a;border-radius:10px}.history-item{display:flex;justify-content:space-between;align-items:center;padding:15px 20px;background:#ffffff08;border-radius:15px;border:1px solid rgba(255,255,255,.05)}.history-date{font-size:13px;color:#9ca9b8;font-weight:600}.history-status{font-size:11px;font-weight:800;color:#8db38a;letter-spacing:1px}.missions-book-btn{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;padding:0;border-radius:10px;border:1px solid rgba(255,255,255,.18);background:#ffffff0f;color:var(--text-primary, #8db38a);cursor:pointer;transition:background .2s ease,border-color .2s ease,box-shadow .2s ease}.missions-book-btn:hover,.missions-book-btn.is-open{background:#ffffff24;border-color:#8db38ab3;box-shadow:none}.missions-book-btn:focus-visible{outline:2px solid rgba(141,179,138,.9);outline-offset:2px}.missions-popover{position:fixed;top:88px;right:24px;z-index:1100;width:min(420px,calc(100vw - 32px));max-height:calc(100vh - 110px);overflow-y:auto;background:var(--navy-800);border:1px solid rgba(141,179,138,.12);border-radius:20px;box-shadow:0 24px 60px #8db38ab3;animation:missionsPopoverIn .18s ease-out}@keyframes missionsPopoverIn{0%{opacity:0}to{opacity:1}}.missions-popover-close{position:absolute;top:12px;right:12px;z-index:1;display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border:none;border-radius:8px;background:transparent;color:var(--text-secondary, var(--gold));cursor:pointer}.missions-popover-close:hover{background:#ffffff14;color:var(--gold)}.missions-popover .missions-container{padding:24px 20px 20px;border-radius:20px;max-width:none;box-shadow:none}.missions-popover .missions-header{margin-bottom:18px;padding-right:32px}.missions-popover .missions-header h3{font-size:1.6rem;margin-top:0}.missions-popover .missions-header p{font-size:.95rem}.missions-popover .missions-list{gap:12px}.missions-popover .mission-card{gap:14px;padding:14px;border-radius:16px}.missions-popover .mission-icon{width:44px;height:44px;font-size:1.5rem;border-radius:12px}.missions-popover .mission-info h4{font-size:1.05rem;margin-bottom:4px}.missions-popover .mission-info p{font-size:.85rem;margin-bottom:10px}.missions-popover .mission-status{width:48px}@media(max-width:600px){.missions-popover{top:76px;right:16px}}.board{--sq-light: var(--board-light, #ece3d0);--sq-dark: var(--board-dark, #7b8ca3);--sq-last: var(--board-last, rgba(var(--gold-rgb), .5));--sq-selected: var(--board-selected, rgba(var(--gold-rgb), .72));position:relative;width:100%;aspect-ratio:1 / 1;display:grid;grid-template-columns:repeat(8,1fr);grid-template-rows:repeat(8,1fr);border-radius:6px;overflow:hidden;-webkit-user-select:none;user-select:none;border:1px solid var(--navy-line, var(--navy-line));box-shadow:0 10px 28px #00000059}.board-sq{position:relative;display:flex;align-items:center;justify-content:center;min-width:0;min-height:0}.board-sq.light{background:var(--sq-light)}.board-sq.dark{background:var(--sq-dark)}.board-sq.last:before,.board-sq.selected:before{content:"";position:absolute;inset:0;background:var(--sq-last)}.board-sq.selected:before{background:var(--sq-selected)}.board-sq.in-check:after{content:"";position:absolute;inset:0;background:radial-gradient(circle,rgba(196,82,70,.85) 0%,rgba(196,82,70,.3) 50%,transparent 72%)}.board-sq.can-move{cursor:pointer}.board-sq.drag-over{box-shadow:inset 0 0 0 4px #f4efe4bf}.board-piece{position:relative;z-index:2;width:90%;height:90%;object-fit:contain;filter:var(--board-piece-filter, none);-webkit-user-drag:element}.board-sq.can-move .board-piece{cursor:grab}.board-piece.dragging{opacity:.35}.board-dot{position:absolute;z-index:3;width:28%;height:28%;border-radius:50%;background:#16223247;pointer-events:none}.board-ring{position:absolute;z-index:3;inset:5%;border-radius:50%;border:5px solid rgba(22,34,50,.28);pointer-events:none}.board-coord{position:absolute;z-index:1;font-size:clamp(9px,1.3vmin,12px);font-weight:700;line-height:1;pointer-events:none}.board-coord.rank{top:4%;left:5%}.board-coord.file{bottom:4%;right:6%}.board-sq.light .board-coord{color:var(--sq-dark)}.board-sq.dark .board-coord{color:var(--sq-light)}.board-mark{position:absolute;z-index:4;top:3%;right:3%;width:34%;max-width:26px;aspect-ratio:1;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;box-shadow:0 1px 3px #00000059;pointer-events:none}.board-mark.good{background:#5f8f5b}.board-mark.bad{background:#b4584b}.board-promo{position:absolute;inset:0;z-index:10;display:flex;align-items:center;justify-content:center;background:#0d131d99}.board-promo-box{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;padding:14px;border-radius:10px;background:var(--navy-800, var(--navy-800));border:1px solid var(--navy-line, var(--navy-line));width:min(80%,340px)}.board-promo-btn{aspect-ratio:1;padding:6px;border-radius:8px;border:1px solid var(--navy-line, var(--navy-line));background:var(--sq-light)}.board-promo-btn:hover{background:#fff;border-color:var(--gold, var(--gold))}.board-promo-btn img{width:100%;height:100%}.board-promo-cancel{grid-column:1 / -1;padding:6px;font-size:.85rem;border-color:var(--navy-line, var(--navy-line));color:var(--slate, #9ca9b8)}.board-promo-cancel:hover{background:transparent;color:var(--ivory, #f4efe4)}.board-annotations{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:6}.ad-slot{display:flex;flex-direction:column;align-items:center;gap:4px}.ad-slot-label{font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;color:var(--slate)}.ad-slot ins{width:100%}.ad-slot-home{width:100%;margin-top:32px;min-height:90px}.ad-slot-lesson{width:160px;min-height:600px;position:sticky;top:88px}.ad-slot-placeholder{justify-content:center;border:1px dashed var(--border-color);border-radius:8px;color:var(--slate);font-size:.8rem}.hero-demo{display:grid;grid-template-columns:min(100%,500px,max(300px,calc(100svh - 300px))) minmax(240px,320px);justify-content:center;align-items:center;gap:24px;width:100%}.hero-demo-board{width:100%}.hero-demo-cta{display:flex;justify-content:center;width:100%;margin-top:16px}@media(max-width:900px){.hero-demo{grid-template-columns:minmax(0,1fr);max-width:480px;margin:0 auto}}.hero-demo-panel{padding:14px 16px;border-radius:var(--radius);background:var(--bg-card);border:1px solid var(--border-color)}.hero-demo-game{display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px;margin:0 0 12px;font-size:.92rem;font-weight:600;color:var(--ivory-2)}.hero-demo-game span{display:inline-flex;align-items:center;gap:6px}.hero-demo-game img{width:20px;height:20px}.hero-demo-game .hero-demo-vs{font-weight:400;color:var(--slate)}.hero-demo-move{display:inline-block;margin-right:8px;padding:1px 7px;border-radius:4px;background:var(--gold-soft);font-family:var(--font-notation);font-size:.86rem;color:var(--gold)}.hero-demo-prompt{margin:0;font-size:.97rem;color:var(--ivory)}.hero-demo-result{display:flex;gap:8px;align-items:flex-start;margin:10px 0 0;font-family:var(--font-explanation);font-size:.93rem}.hero-demo-result svg{flex-shrink:0;margin-top:2px}.hero-demo-result.ok{color:var(--success)}.hero-demo-result.no{color:var(--danger)}.hero-demo-result span{color:var(--ivory-2)}.hero-demo-reveal{margin-top:10px;padding:6px 14px;font-size:.88rem;border-color:var(--border-color);color:var(--slate)}.hero-demo-reveal:hover{background:var(--bg-raised);color:var(--ivory);border-color:var(--slate)}.home{max-width:1240px;margin:0 auto;padding:0 32px}.home-stage{padding:12px 0 36px}.home-stage-head{max-width:820px;margin:0 auto 18px;text-align:center}.home-kicker{display:inline-block;margin:0 0 12px;padding:3px 10px;border-radius:4px;background:var(--gold-soft);font-family:var(--font-notation);font-size:.85rem;color:var(--gold)}.home-stage h1{margin:0;font-size:clamp(1.8rem,3.6vw,2.7rem);line-height:1.1;letter-spacing:-.015em;text-wrap:balance}.home-stage h1 span{color:var(--gold)}.home-sub{margin:10px auto 0;max-width:640px;font-size:1.06rem;color:var(--ivory-2);text-wrap:pretty}.home-stage-foot{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:20px 40px;margin-top:24px}.home-stats{display:flex;flex-wrap:wrap;gap:32px}.home-stat-value{font-size:1.5rem;font-weight:700;color:var(--ivory);line-height:1.1}.home-stat-label{font-size:.86rem;color:var(--slate)}.home-btn-primary{display:inline-flex;align-items:center;gap:8px;padding:13px 26px;border:none;border-radius:8px;background:var(--gold);color:var(--navy-900);font-size:1.05rem;font-weight:700}.home-btn-primary:hover{background:var(--gold-strong);color:var(--navy-900)}.home-features{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;padding:8px 0 24px}.home-feature{position:relative;display:flex;gap:14px;padding:20px;border-radius:var(--radius);border:1px solid var(--border-color);background:var(--bg-card)}.home-feature-move{position:absolute;top:10px;right:14px;font-family:var(--font-notation);font-size:.78rem;letter-spacing:.02em;color:var(--gold);opacity:.55}.home-feature svg{flex-shrink:0;margin-top:2px;color:var(--gold)}.home-feature h2{margin:0 0 4px;padding-right:52px;font-size:1.05rem}.home-feature p{margin:0;font-size:.93rem;color:var(--slate)}.home-bot{display:flex;align-items:center;gap:20px;margin-bottom:20px;padding:22px 24px;border-radius:var(--radius);border:1px solid var(--border-color);background:var(--bg-card)}.home-bot>svg{flex-shrink:0;color:var(--gold)}.home-bot>div{flex:1}.home-bot h2{margin:0 0 4px;font-size:1.2rem}.home-bot p{margin:0;color:var(--slate)}.home-bot .home-btn-primary{flex-shrink:0}.home-results{display:flex;flex-direction:column;gap:18px;padding:22px;border-radius:var(--radius);background:var(--gold-soft);border:1px solid rgba(var(--gold-rgb),.3)}.home-climb{display:flex;flex-wrap:wrap;align-items:center;gap:20px 28px;padding:18px 22px;border-radius:var(--radius);background:var(--bg-card);border:1px solid var(--border-color)}.home-climb-num{display:flex;flex-direction:column;gap:4px}.home-climb-value{font-size:clamp(2rem,4vw,2.75rem);font-weight:800;line-height:1;color:var(--ivory);font-variant-numeric:tabular-nums}.home-climb-value.gold{color:var(--gold)}.home-climb-label{font-size:.8rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--slate)}.home-climb-arrow{color:var(--gold);flex-shrink:0}.home-climb-gain{margin-left:auto;padding-left:28px;border-left:1px solid var(--border-color)}.home-climb-gain .home-climb-value{color:var(--success)}.home-results-row{display:flex;align-items:center;justify-content:space-between;gap:24px}.home-results p{margin:0;font-size:.95rem;color:var(--ivory-2)}.home-results strong{color:var(--gold)}.home-btn-secondary{flex-shrink:0;padding:10px 18px;font-size:.95rem}.home-footer{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px 32px;margin-top:32px;padding:24px 0 32px;border-top:1px solid var(--border-color)}.home-footer-brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--ivory)}.home-footer-brand img{width:30px;height:30px;object-fit:cover;object-position:top;border-radius:7px}.home-footer-brand span span{color:var(--gold)}.home-footer-links{display:flex;flex-wrap:wrap;gap:8px 22px;font-size:.92rem}.home-footer-links a{color:var(--slate)}.home-footer-links a:hover{color:var(--gold)}.home-footer-copy{flex-basis:100%;margin:0;font-size:.85rem;color:var(--slate)}@media(max-width:980px){.home{padding:0 16px}.home-stage{padding-top:12px}.home-bot{flex-direction:column;align-items:flex-start}.home-features{grid-template-columns:minmax(0,1fr)}.home-results-row{flex-direction:column;align-items:flex-start}.home-climb-gain{margin-left:0;padding-left:0;border-left:none}}.home-hero{min-height:100vh;background:var(--navy-900);position:relative;overflow-x:hidden;display:flex;align-items:center;justify-content:center}.home-hero .page-container{width:100%;max-width:1200px;padding:40px 20px;z-index:10;display:flex;justify-content:center}.home-hero .CONTAINER{width:100%;display:grid;grid-template-columns:1fr 1fr;background:var(--navy-800);border-radius:14px;overflow:hidden;padding:40px;border:1px solid var(--border-color);box-shadow:var(--shadow-soft)}.login-visual{position:relative;background:url(https://images.unsplash.com/photo-1528819622765-d6bcf132f793?q=80&w=2070&auto=format&fit=crop) center/cover no-repeat;display:flex;align-items:flex-end;padding:60px}.visual-overlay{position:absolute;inset:0;background:linear-gradient(to top,var(--navy-900) 0%,rgba(17,23,34,.4) 50%,transparent 100%)}.visual-content{position:relative;z-index:2}.visual-content h2{font-size:3.5rem;font-weight:900;line-height:1.1;margin-bottom:20px;letter-spacing:-1px}.visual-content p{font-size:1.1rem;color:#9ca9b8;max-width:400px;line-height:1.6}.CARD{padding:80px 60px;display:flex;flex-direction:column;justify-content:center;background:#11172280}.CARD h3{font-size:2.2rem;font-weight:800;margin-bottom:40px;letter-spacing:-.5px;color:#fff}.input{width:100%;background:#ffffff08;border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:18px 24px;color:#fff;font-size:1rem;margin-bottom:20px;transition:all .3s cubic-bezier(.4,0,.2,1)}.input:focus{outline:none;background:#ffffff0d;border-color:var(--gold);box-shadow:0 0 0 4px rgba(var(--gold-rgb),.15)}.signInButton{width:100%;margin-top:10px;background:var(--gold);border:none;border-radius:12px;padding:18px;color:#000;font-weight:700;font-size:1.1rem;cursor:pointer;box-shadow:0 20px 40px #162232ef;transition:all .4s cubic-bezier(.16,1,.3,1)}.signInButton:hover{transform:translateY(-1px);box-shadow:0 25px 50px rgba(var(--gold-rgb),.5)}.signInButton:active{transform:translateY(1px)}.back-link{margin-top:30px;text-align:center;font-size:.95rem;color:var(--gold);cursor:pointer}.signup-link{color:var(--gold);font-weight:600;margin-left:5px}.signup-link:hover{text-decoration:underline}.info-msg{color:#9ca9b8;font-size:.9rem;text-align:center}@media(max-width:1024px){.home-hero .CONTAINER{grid-template-columns:1fr;max-width:500px}.login-visual{display:none}.CARD{padding:60px 40px}}@media(max-width:480px){.CARD{padding:40px 24px}.CARD h3{font-size:1.8rem}}.legal-consent{margin-top:16px;font-size:.82rem;color:var(--slate);text-align:center}.theme-picker{margin-bottom:1.5rem;text-align:left}.theme-picker h4{margin:0 0 10px;font-size:.95rem}.theme-picker-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.theme-option{display:flex;align-items:center;gap:10px;padding:8px 10px;border:1px solid var(--border-color);background:var(--bg-raised);color:var(--ivory-2);font-size:.8rem;font-weight:500;text-align:left}.theme-option:hover{background:var(--navy-600);color:var(--ivory)}.theme-option.active{border-color:var(--gold);box-shadow:0 0 0 1px var(--gold)}.theme-option.locked{opacity:.55;cursor:not-allowed}.theme-swatch{flex-shrink:0;width:28px;height:28px;border-radius:4px;background:conic-gradient(var(--d) 0 25%,var(--l) 0 50%,var(--d) 0 75%,var(--l) 0)}.theme-label{display:inline-flex;align-items:center;gap:4px}.theme-picker-note{margin:8px 0 0;font-size:.75rem;color:var(--slate)}.settings-toggles{display:flex;flex-direction:column;gap:14px;margin:1.25rem 0 1.5rem;padding:14px 0;border-top:1px solid var(--border-color);border-bottom:1px solid var(--border-color)}.settings-toggle{display:flex;align-items:center;justify-content:space-between;gap:16px;text-align:left}.settings-toggle-label{font-weight:600;color:var(--text-primary)}.settings-toggle-desc{margin:2px 0 0;font-size:.78rem;line-height:1.4;color:var(--text-secondary)}.settings-switch{flex-shrink:0;position:relative;display:inline-flex;align-items:center;width:74px;height:32px;padding:0 10px;border-radius:16px;border:1px solid var(--border-color);background:var(--bg-raised);color:var(--text-secondary);font-size:.8rem;font-weight:700;cursor:pointer;justify-content:flex-end;transition:background .15s ease}.settings-switch.on{background:var(--gold);border-color:var(--gold);color:var(--navy-900);justify-content:flex-start}.settings-switch-knob{position:absolute;top:3px;left:3px;width:24px;height:24px;border-radius:50%;background:var(--text-primary);transition:transform .15s ease}.settings-switch.on .settings-switch-knob{transform:translate(42px);background:var(--navy-900)}.settings-guest-note{font-size:.9rem;color:var(--text-secondary)}.link-button{background:none;border:none;padding:0;color:var(--gold);font:inherit;font-size:.85rem;text-decoration:underline;cursor:pointer}.settings-mode-btn{flex:1;padding:8px;font-size:.8rem;font-weight:700;border-radius:10px;border:1px solid var(--ivory-muted);background:transparent;color:var(--ivory);transition:background-color .15s ease,border-color .15s ease,color .15s ease}.settings-mode-btn:hover{background:var(--gold-soft);border-color:var(--gold);color:var(--ivory)}.settings-mode-btn.active,.settings-mode-btn.active:hover{background:var(--gold);border-color:var(--gold);color:var(--navy-900)}.settings-mode-btn.active:hover{background:var(--gold-strong, var(--gold))}.premium{max-width:760px;margin:0 auto;padding:32px 16px 64px}.premium-head{text-align:center;color:var(--gold)}.premium-head h1{margin:8px 0 4px;font-size:clamp(1.9rem,4vw,2.6rem)}.premium-head p{margin:0;color:var(--slate)}.premium-perks{list-style:none;margin:28px auto;padding:0;max-width:520px;display:grid;gap:10px}.premium-perks li{display:flex;gap:10px;align-items:flex-start;color:var(--ivory-2)}.premium-perks svg{flex-shrink:0;margin-top:3px;color:var(--success)}.premium-plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}.premium-plan{padding:22px;border-radius:var(--radius);border:1px solid var(--border-color);background:var(--bg-card);text-align:center}.premium-plan h2{margin:0;font-size:1.15rem}.premium-price{margin:8px 0 18px;font-size:2rem;font-weight:700;color:var(--ivory)}.premium-price span{font-size:.95rem;font-weight:500;color:var(--slate)}.premium-buy{display:inline-block;width:100%;box-sizing:border-box;padding:11px 18px;border-radius:8px;border:none;background:var(--gold);color:var(--navy-900);font-weight:700;text-align:center}.premium-buy:hover:not(:disabled){background:var(--gold-strong);color:var(--navy-900)}.premium-buy:disabled{opacity:.6;cursor:wait}.premium-active{padding:16px 20px;border-radius:var(--radius);background:var(--gold-soft);text-align:center;color:var(--ivory-2)}.premium-error{margin-top:16px;text-align:center;color:var(--danger)}.premium-trial{margin:0 0 12px;font-size:.85rem;color:var(--slate)}.premium-manage{margin-top:20px;text-align:center}.placement-card{max-width:620px;margin:48px auto;padding:32px 28px;border-radius:var(--radius);border:1px solid var(--border-color);background:var(--bg-card);text-align:center}.placement-card>svg{color:var(--gold)}.placement-card h1{margin:8px 0 10px;font-size:clamp(1.6rem,3.4vw,2.1rem);text-wrap:balance}.placement-card p{color:var(--ivory-2)}.placement-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-top:22px}.placement-btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border-color:var(--border-color);background:var(--bg-raised);color:var(--ivory)}.placement-btn:hover{background:var(--navy-600);color:var(--ivory)}.placement-btn.primary{border-color:var(--gold);background:var(--gold);color:var(--navy-900)}.placement-btn.primary:hover{background:var(--gold-strong);color:var(--navy-900)}.placement-step{margin:0;font-family:var(--font-notation);font-size:.82rem;color:var(--gold)}.placement-muted{margin:10px 0 0;font-size:.9rem;color:var(--slate)}.placement-play{display:grid;grid-template-columns:minmax(0,600px) minmax(240px,340px);justify-content:center;gap:28px;padding:24px 16px 48px}.placement-panel h2{margin:6px 0 0;font-size:1.3rem}.placement-panel .placement-btn{margin-top:16px}.placement-msg{display:flex;gap:8px;align-items:flex-start;margin:14px 0 0;padding:12px 14px;border-radius:var(--radius);background:var(--bg-card);border:1px solid var(--border-color);color:var(--ivory-2)}.placement-msg svg{flex-shrink:0;margin-top:3px}.placement-msg.ok svg{color:var(--success)}.placement-msg.no svg{color:var(--danger)}@media(max-width:900px){.placement-play{grid-template-columns:minmax(0,1fr)}}.lg-page{max-width:1120px;margin:0 auto;padding:16px 32px 56px}.lg-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px}.lg-head h1{margin:0;font-size:2rem}.lg-head p{margin:4px 0 0;color:var(--slate)}.lg-progress{flex-shrink:0;padding:6px 14px;border-radius:999px;border:1px solid rgba(var(--gold-rgb),.4);background:var(--gold-soft);color:var(--gold);font-weight:600;font-size:.92rem}.lg-list{display:flex;flex-direction:column;gap:14px}.lg-item{display:grid;grid-template-columns:148px minmax(0,1fr) auto;gap:22px;align-items:center;padding:16px 20px 16px 16px;border-radius:12px;border:1px solid var(--border-color);background:var(--bg-card);cursor:pointer;transition:border-color .15s ease,background .15s ease}.lg-item:hover{border-color:rgba(var(--gold-rgb),.5);background:var(--bg-raised)}.lg-item.locked{opacity:.8}.lg-board{width:148px;pointer-events:none}.lg-board .board{box-shadow:none}.lg-board .board-coord{display:none}.lg-title-row{display:flex;align-items:center;flex-wrap:wrap;gap:10px}.lg-title-row h2{margin:0;font-size:1.15rem}.lg-status{display:inline-flex;align-items:center;gap:4px;padding:2px 8px;border-radius:999px;font-size:.78rem;font-weight:600;color:var(--gold);background:var(--gold-soft)}.lg-status.done{color:var(--success);background:var(--success-soft)}.lg-desc{margin:4px 0 0;color:var(--ivory-2);font-size:.95rem}.lg-overview{margin:6px 0 0;color:var(--slate);font-size:.9rem;line-height:1.55}.lg-overview strong{color:var(--ivory-2)}.lg-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}.lg-chip{display:inline-flex;align-items:center;gap:5px;padding:2px 10px 2px 6px;border-radius:999px;border:1px solid var(--border-color);font-size:.8rem;color:var(--ivory-2)}.lg-chip img{width:18px;height:18px}.lg-start{display:inline-flex;align-items:center;gap:6px;padding:9px 18px;border:none;background:var(--gold);color:var(--navy-900);font-weight:700;white-space:nowrap}.lg-start:hover{background:var(--gold-strong);color:var(--navy-900)}@media(max-width:760px){.lg-page{padding:16px}.lg-head{flex-direction:column;align-items:flex-start}.lg-item{grid-template-columns:96px minmax(0,1fr);gap:14px}.lg-board{width:96px;align-self:start}.lg-action{grid-column:1 / -1}.lg-start{width:100%;justify-content:center}}.lesson-check{margin:40px 0 24px;padding:20px;border:1px solid var(--border-color);border-radius:10px;background:var(--bg-raised);text-align:left}.ButtonElements:has(>.lesson-check){display:flex;flex-wrap:wrap;justify-content:center;gap:12px}.ButtonElements>.lesson-check{order:-1;flex-basis:100%;min-width:0}.ButtonElements>.lesson-exit,.ButtonElements>.lesson-exit-note{flex-basis:100%}.concept-lesson .lesson-check h2{margin:0 0 12px;font-size:1.3rem}.lesson-check ol{margin:0;padding-left:20px}.lesson-check li{margin-bottom:28px}.lesson-check li:last-child{margin-bottom:0}.concept-lesson .lesson-check .lesson-check-prompt{margin:0 0 10px;font-weight:600;color:var(--ivory)}.lesson-check-board{width:min(360px,100%);margin-bottom:10px}.lesson-check-choices{display:flex;flex-wrap:wrap;gap:8px}.concept-lesson .lesson-check .lesson-check-choices button,.lesson-check .lesson-check-choices button{margin:0;padding:8px 14px;border:1px solid var(--border-color);border-radius:6px;background:var(--navy-600);box-shadow:none;color:var(--ivory);font-size:.95rem;font-weight:500;text-align:left;transform:none}.concept-lesson .lesson-check .lesson-check-choices button:hover:not(:disabled){border-color:var(--gold);background:var(--navy-600);color:var(--ivory)}.concept-lesson .lesson-check .lesson-check-choices button.correct{border-color:#3fa66b}.concept-lesson .lesson-check .lesson-check-choices button.wrong{border-color:#cf5c55}.lesson-check textarea{width:100%;margin-bottom:8px;padding:8px;border:1px solid var(--border-color);border-radius:6px;background:var(--navy-900);color:var(--ivory);font:inherit;box-sizing:border-box}.concept-lesson .lesson-check .lesson-check-result,.lesson-check-result{display:flex;align-items:flex-start;gap:8px;margin:10px 0 0;font-size:.93rem}.lesson-check-result svg{flex:none;margin-top:3px}.lesson-check-result.correct svg{color:#3fa66b}.lesson-check-result.wrong svg{color:#cf5c55}.concept-lesson .lesson-check .lesson-check-hint{margin:8px 0 0;font-size:.9rem;color:var(--slate)}.energy-modal-overlay{position:fixed;inset:0;background:#111722cc;display:flex;align-items:center;justify-content:center;padding:16px;z-index:10000}.energy-modal{position:relative;width:min(440px,100%);padding:36px 32px 28px;border-radius:16px;background:var(--bg-secondary, var(--navy-800));border:1px solid var(--border-hover, rgba(var(--gold-rgb), .4));box-shadow:var(--shadow-strong, 0 20px 40px -10px rgba(0, 0, 0, .8));color:var(--text-primary, #f4efe4);text-align:center;animation:energyModalIn .25s ease-out}@keyframes energyModalIn{0%{opacity:0;transform:translateY(12px) scale(.98)}to{opacity:1;transform:none}}.energy-modal h2{margin:0 0 12px;font-family:var(--font-heading, inherit);font-size:1.6rem;color:var(--text-primary, var(--gold))}.energy-modal p{margin:0 0 22px;color:var(--text-secondary, var(--gold-strong));font-size:1rem;font-style:normal;line-height:1.55;text-align:center}.energy-modal-close{position:absolute;top:10px;right:12px;width:36px;height:36px;border:none;border-radius:8px;background:transparent;color:var(--text-secondary, var(--gold-strong));font-size:1.6rem;line-height:1;cursor:pointer}.energy-modal-close:hover{background:#ffffff14;color:#fff}.energy-modal-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}.energy-btn-primary,.energy-btn-secondary{padding:10px 22px;border-radius:8px;font-weight:600;font-size:.95rem;font-family:inherit;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease,background .15s ease}.energy-btn-primary{border:1px solid var(--primary-electric, var(--gold));background:var(--primary-electric, var(--gold));color:#000}.energy-btn-primary:hover{transform:translateY(-1px);box-shadow:var(--neon-glow, 0 0 15px rgba(var(--gold-rgb), .4))}.energy-btn-secondary{border:1px solid rgba(255,255,255,.2);background:transparent;color:var(--text-primary, #f4efe4)}.energy-btn-secondary:hover{background:#ffffff14}.energy-btn-primary:disabled,.energy-btn-secondary:disabled{opacity:.55;cursor:default;transform:none;box-shadow:none}.energy-toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%);padding:10px 18px;border-radius:999px;background:#162232f2;border:1px solid var(--border-hover, rgba(var(--gold-rgb), .4));color:var(--text-primary, #f4efe4);font-size:.95rem;box-shadow:var(--shadow-soft, 0 10px 30px -10px rgba(0, 0, 0, .5));z-index:10001;animation:energyToastIn .2s ease-out}@keyframes energyToastIn{0%{opacity:0;transform:translate(-50%,8px)}to{opacity:1;transform:translate(-50%)}}.energy-gate-checking{min-height:40vh;display:flex;align-items:center;justify-content:center;color:var(--text-secondary, #9ca9b8);opacity:0;animation:energyGateIn .2s ease-out .4s forwards}@keyframes energyGateIn{to{opacity:1}}.nav-energy{background:transparent;border:1px solid transparent;border-radius:8px;padding:4px 8px;color:var(--text-primary, #f4efe4);font:inherit;cursor:pointer;transition:border-color .2s ease,box-shadow .2s ease}.nav-energy:hover{border-color:var(--border-hover, rgba(var(--gold-rgb), .4));box-shadow:var(--neon-glow, 0 0 15px rgba(var(--gold-rgb), .4))}.energy-panel{text-align:left}.energy-panel-balance{display:flex;align-items:baseline;gap:6px;margin-bottom:8px}.energy-panel-number{font-family:var(--font-heading, inherit);font-size:2rem;font-weight:700;color:#fff}.energy-panel-max{color:var(--text-secondary, #9ca9b8);font-size:1rem}.energy-bar{height:8px;border-radius:999px;background:#162232e3;overflow:hidden;margin-bottom:18px}.energy-bar-fill{height:100%;border-radius:999px;background:var(--gold);transition:width .7s ease}.energy-bar.energy-bar--low{background:#1c2a3de6}.energy-bar-fill.energy-bar-fill--low{background:#d08a7e;box-shadow:none}.energy-panel-rules{margin:0 0 6px;padding-left:18px;color:var(--text-secondary, #9ca9b8);font-size:.95rem;line-height:1.5}.energy-panel-rules li+li{margin-top:6px}.energy-panel-rules strong{color:var(--text-primary, #f4efe4)}.energy-panel-section{margin-top:20px;padding-top:16px;border-top:1px solid rgba(255,255,255,.08);text-align:center}.energy-panel-heading{font-weight:600;color:var(--text-primary, #f4efe4);margin-bottom:10px}.energy-modal .energy-panel-muted{margin:10px 0 0;color:var(--text-secondary, #9ca9b8);font-size:.85rem;text-align:center}.energy-ad-slot{border:1px dashed rgba(255,255,255,.25);border-radius:10px;padding:18px 12px;color:var(--text-secondary, #9ca9b8)}.energy-ad-slot-label{font-size:.8rem;letter-spacing:.06em;text-transform:uppercase;margin-bottom:6px}.energy-ad-slot-timer{font-family:var(--font-heading, inherit);font-size:1.3rem;color:var(--text-primary, #f4efe4)}.lesson-exit{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin:28px 0 8px}.lesson-exit button{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;font-size:.97rem}.lesson-exit-back{border-color:var(--border-color);background:var(--bg-raised);color:var(--ivory)}.lesson-exit-back:hover:not(:disabled){background:var(--navy-600);color:var(--ivory)}.lesson-exit-save{border-color:var(--gold);background:var(--gold);color:var(--navy-900)}.lesson-exit-save:hover:not(:disabled){background:var(--gold-strong);color:var(--navy-900)}.lesson-exit button:disabled{opacity:.5;cursor:not-allowed}.lesson-exit-note{margin:0 0 24px;text-align:center;font-size:.82rem;color:var(--slate)}.lesson-actions .lesson-exit{justify-content:flex-start;margin:0}.lesson-actions .lesson-exit-note{flex-basis:100%;margin:0;text-align:left}.lesson-page{--lesson-board: min( calc(100vh - 150px) , 100%);display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:32px;max-width:1440px;margin:0 auto;padding:24px 32px 40px;align-items:start}.lesson-page:has(>.lesson-ad){grid-template-columns:minmax(0,1fr) minmax(0,1fr) 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4px;color:inherit;font:inherit;cursor:pointer}.past-move:hover{color:var(--gold)}@media(max-width:900px){.past-page{flex-direction:column;align-items:stretch}.past-list-panel,.past-viewer{width:100%;max-width:none}.past-list{max-height:260px;overflow-y:auto}}.shadow-tournament{position:relative;width:100%;min-height:100vh;overflow-x:hidden;color:var(--text-primary);background:var(--bg-primary)}.shadow-tournament .particles-layer{position:fixed;top:0;left:0;width:100%;height:100%;z-index:0;pointer-events:none}.shadow-tournament .floating-pieces-bg{position:fixed;top:0;left:0;width:100%;height:100%;z-index:0;pointer-events:none;overflow:hidden}.shadow-tournament .bg-piece{position:absolute;color:var(--primary-electric);animation:floatPiece linear infinite;will-change:transform}@keyframes floatPiece{0%,to{transform:translateY(0) rotate(0)}25%{transform:translateY(-30px) rotate(10deg)}50%{transform:translateY(0) rotate(0)}75%{transform:translateY(30px) rotate(-10deg)}}.section-heading{text-align:center;margin-bottom:48px;position:relative;z-index:1}.section-heading h2{font-size:2rem;display:inline-flex;align-items:center;gap:12px;margin-bottom:10px}.section-heading p{color:var(--text-secondary);font-size:1.05rem}.fade-in-section{opacity:0;transform:translateY(50px);transition:opacity .7s ease,transform .7s ease}.fade-in-section.visible{opacity:1;transform:translateY(0)}.tourney-hero{position:relative;z-index:1;min-height:85vh;display:flex;align-items:center;justify-content:center;padding:160px 5% 80px;overflow:hidden;text-align:center}.tourney-hero-glow{position:absolute;width:900px;height:500px;top:50%;left:50%;transform:translate(-50%,-50%);background:none;pointer-events:none;animation:heroPulse 5s ease-in-out infinite}@keyframes heroPulse{0%,to{opacity:.5;transform:translate(-50%,-50%) scale(1)}50%{opacity:1;transform:translate(-50%,-50%) scale(1.1)}}.tourney-hero-inner{max-width:740px;position:relative;z-index:2}.tourney-hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(var(--gold-rgb),.08);border:1px solid rgba(var(--gold-rgb),.25);padding:8px 18px;border-radius:50px;font-size:.85rem;color:var(--primary-electric);margin-bottom:28px;animation:fadeInUp .6s ease-out .2s both}.tourney-hero-title{font-size:clamp(2.6rem,5.5vw,4rem);font-weight:800;line-height:1.08;letter-spacing:-1px;margin-bottom:20px;animation:fadeInUp .6s ease-out .3s both}.tourney-hero-title .accent{background:var(--gold);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.tourney-hero-desc{font-size:1.15rem;color:var(--text-secondary);line-height:1.7;max-width:600px;margin:0 auto 36px;animation:fadeInUp .6s ease-out .4s both}.tourney-hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:48px;animation:fadeInUp .6s ease-out .5s both}.tourney-hero-stats{display:flex;align-items:center;justify-content:center;gap:28px;animation:fadeInUp .6s ease-out .6s both}.tstat{display:flex;flex-direction:column;gap:4px}.tstat-val{font-size:1.8rem;font-weight:700;color:#fff}.tstat-label{font-size:.8rem;color:var(--text-secondary);text-transform:uppercase;letter-spacing:1px}.tstat-divider{width:1px;height:36px;background:#ffffff14}.shadow-tournament .btn-glow{display:inline-flex;align-items:center;gap:10px;background:var(--primary-electric);color:#000;font-weight:700;padding:14px 28px;font-size:1rem;border-radius:12px;border:none;box-shadow:none;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1)}.shadow-tournament .btn-glow:hover{transform:translateY(-3px) scale(1.02);box-shadow:none;color:#000}.shadow-tournament .btn-glow.large{padding:18px 40px;font-size:1.1rem}.shadow-tournament .btn-outline{display:inline-flex;align-items:center;gap:10px;background:transparent;color:#fff;font-weight:600;padding:14px 28px;font-size:1rem;border-radius:12px;border:1px solid rgba(255,255,255,.15);cursor:pointer;transition:all .3s ease}.shadow-tournament .btn-outline:hover{border-color:#fff;background:#ffffff0d;transform:translateY(-2px)}.world-map-section{padding:80px 5%;position:relative;z-index:1}.world-map-wrapper{max-width:1100px;margin:0 auto;border-radius:32px;overflow:hidden;position:relative;background:var(--navy-900);box-shadow:0 50px 100px #000c;border:1px solid rgba(255,255,255,.03)}.map-hud-overlay{position:absolute;inset:0;pointer-events:none;z-index:2}.hud-corner{position:absolute;width:40px;height:40px;border:2px solid var(--primary-purple);opacity:.3}.hud-corner.top-left{top:20px;left:20px;border-right:0;border-bottom:0}.hud-corner.top-right{top:20px;right:20px;border-left:0;border-bottom:0}.hud-corner.bottom-left{bottom:20px;left:20px;border-right:0;border-top:0}.hud-corner.bottom-right{bottom:20px;right:20px;border-left:0;border-top:0}.hud-grid-lines{position:absolute;inset:0;background-image:linear-gradient(rgba(var(--gold-rgb),.05) 1px,transparent 1px),linear-gradient(90deg,rgba(var(--gold-rgb),.05) 1px,transparent 1px);background-size:50px 50px}.world-map-img{width:100%;height:auto;display:block;filter:invert(1) hue-rotate(240deg) saturate(.5) brightness(.2) contrast(1.2);-webkit-user-select:none;user-select:none;pointer-events:none;opacity:.6}.world-map-dots-svg{position:absolute;top:0;left:0;width:100%;height:100%;z-index:3}.city-dot-core{filter:drop-shadow(0 0 5px var(--primary-purple))}.map-legend{display:flex;justify-content:center;gap:24px;padding:20px;background:#ffffff05;border-top:1px solid rgba(255,255,255,.03)}.legend-item{display:flex;align-items:center;gap:8px;font-size:.8rem;font-weight:600;color:var(--text-secondary)}.legend-dot{width:8px;height:8px;border-radius:50%}.legend-dot.verified-dot{background:var(--primary-purple);box-shadow:none}.legend-dot.community-dot{background:var(--gold);box-shadow:none}.lichess-section{padding:0 5% 60px;position:relative;z-index:1}.lichess-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;max-width:1100px;margin:0 auto}.lichess-card{background:var(--navy-800);border:1px solid rgba(208,138,126,.12);border-radius:14px;padding:18px 20px;text-decoration:none;color:var(--text-primary);transition:all .3s ease;display:flex;flex-direction:column;gap:10px}.lichess-card:hover{transform:translateY(-4px);border-color:#d08a7e59;box-shadow:0 10px 30px #0000004d,0 0 20px #d08a7e0f;color:var(--text-primary)}.lichess-card-top{display:flex;justify-content:space-between;align-items:center}.lichess-clock{font-size:.78rem;color:var(--text-secondary);font-weight:600;font-family:JetBrains Mono,monospace}.lichess-card h4{font-size:.92rem;font-weight:600;line-height:1.3;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.lichess-meta{display:flex;justify-content:space-between;align-items:center;font-size:.78rem;color:var(--text-secondary)}.lichess-meta span{display:inline-flex;align-items:center;gap:4px}.lichess-link{color:var(--primary-electric);font-weight:600}.featured-section{padding:0 5% 60px;position:relative;z-index:1}.featured-card{max-width:1100px;margin:0 auto;background:var(--navy-800);border:1px solid rgba(var(--gold-rgb),.15);border-radius:24px;padding:40px 48px 32px;position:relative;overflow:hidden}.featured-card:before{content:"";position:absolute;inset:0;background:none;pointer-events:none}.featured-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(var(--gold-rgb),.1);border:1px solid rgba(var(--gold-rgb),.3);padding:6px 14px;border-radius:50px;font-size:.78rem;font-weight:600;color:var(--primary-electric);margin-bottom:20px;text-transform:uppercase;letter-spacing:1px}.featured-badges-row{display:flex;align-items:center;gap:10px;margin-bottom:12px}.featured-content{display:flex;gap:48px;align-items:center;position:relative;z-index:1}.featured-left{flex:1}.featured-left h2{font-size:1.8rem;margin-bottom:10px}.featured-desc{color:var(--text-secondary);margin-bottom:20px;line-height:1.6}.featured-meta{display:flex;flex-wrap:wrap;gap:18px;font-size:.88rem;color:var(--text-secondary);margin-bottom:14px}.featured-meta span{display:inline-flex;align-items:center;gap:6px}.website-link{display:inline-flex;align-items:center;gap:6px;font-size:.84rem;color:var(--primary-electric);font-weight:600;text-decoration:none;padding:6px 14px;border-radius:8px;background:rgba(var(--gold-rgb),.06);border:1px solid rgba(var(--gold-rgb),.12);transition:all .3s}.website-link:hover{background:rgba(var(--gold-rgb),.12);border-color:rgba(var(--gold-rgb),.3)}.featured-right{display:flex;flex-direction:column;align-items:center;gap:20px;min-width:180px}.countdown-box{display:flex;flex-direction:column;align-items:center;gap:4px}.countdown-number{font-size:3.5rem;font-weight:800;background:var(--gold);-webkit-background-clip:text;-webkit-text-fill-color:transparent;line-height:1}.countdown-label{font-size:.8rem;color:var(--text-secondary);text-transform:uppercase;letter-spacing:1.5px}.live-indicator-lg{display:flex;flex-direction:column;align-items:center;gap:8px;font-size:1.1rem;font-weight:700;color:#d08a7e}.live-indicator-lg .current-round{font-size:.8rem;color:var(--text-secondary);font-weight:500}.featured-fill-bar{margin-top:24px;height:5px;background:#ffffff0f;border-radius:3px;overflow:hidden}.featured-fill-inner{height:100%;background:var(--gold);border-radius:3px;transition:width .6s ease}.fill-label{display:block;text-align:right;font-size:.75rem;color:var(--text-secondary);margin-top:6px}.tourney-controls{max-width:1200px;margin:0 auto;padding:0 5% 32px;position:relative;z-index:1}.controls-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.controls-header h2{font-size:1.6rem}.refresh-row{display:flex;align-items:center;gap:10px}.last-updated{font-size:.78rem;color:var(--text-secondary)}.refresh-btn{background:#ffffff0a;border:1px solid rgba(255,255,255,.08);border-radius:8px;width:32px;height:32px;display:flex;align-items:center;justify-content:center;color:var(--text-secondary);cursor:pointer;padding:0;transition:all .3s}.refresh-btn:hover{color:var(--primary-electric);border-color:rgba(var(--gold-rgb),.3);transform:none;box-shadow:none}.refresh-btn.spinning svg{animation:spin .8s linear}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.search-row{display:flex;gap:12px;margin-bottom:16px}.search-box{flex:1;display:flex;align-items:center;gap:10px;background:#162232b3;border:1px solid rgba(255,255,255,.06);border-radius:14px;padding:0 18px;transition:border-color .3s ease}.search-box:focus-within{border-color:rgba(var(--gold-rgb),.4);box-shadow:none}.search-box svg{color:var(--text-secondary);flex-shrink:0}.search-box input{flex:1;background:transparent;border:none;outline:none;color:#fff;font-size:.95rem;padding:14px 0;font-family:var(--font-body)}.search-box input::placeholder{color:#ffffff4d}.search-clear{background:#ffffff14;border:none;border-radius:50%;width:24px;height:24px;display:flex;align-items:center;justify-content:center;color:var(--text-secondary);cursor:pointer;transition:background .2s;padding:0}.search-clear:hover{background:#ffffff26;transform:none;box-shadow:none}.filter-toggle{display:flex;align-items:center;gap:8px;padding:0 22px;background:#162232b3;border:1px solid rgba(255,255,255,.06);border-radius:14px;color:var(--text-secondary);cursor:pointer;font-size:.9rem;font-weight:500;transition:all .3s}.filter-toggle:hover,.filter-toggle.active{border-color:rgba(var(--gold-rgb),.3);color:var(--primary-electric);background:rgba(var(--gold-rgb),.05);transform:none;box-shadow:none}.filter-panel{background:#162232cc;border:1px solid rgba(255,255,255,.06);border-radius:16px;padding:24px;margin-bottom:16px;animation:slideDown .3s ease}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.filter-group{margin-bottom:16px}.filter-group:last-child{margin-bottom:0}.filter-group label{display:block;font-size:.8rem;color:var(--text-secondary);text-transform:uppercase;letter-spacing:1px;margin-bottom:10px;font-weight:600}.filter-chips{display:flex;flex-wrap:wrap;gap:8px}.chip{padding:7px 16px;border-radius:50px;background:#ffffff0a;border:1px solid rgba(255,255,255,.08);color:var(--text-secondary);font-size:.82rem;font-weight:500;cursor:pointer;transition:all .25s}.chip:hover{border-color:rgba(var(--gold-rgb),.3);color:var(--primary-electric);transform:none;box-shadow:none}.chip.active{background:rgba(var(--gold-rgb),.12);border-color:rgba(var(--gold-rgb),.4);color:var(--primary-electric);box-shadow:none;transform:none}.tab-row{display:flex;gap:8px;flex-wrap:wrap}.tab-pill{display:inline-flex;align-items:center;gap:8px;padding:10px 22px;border-radius:50px;background:transparent;border:1px solid rgba(255,255,255,.06);color:var(--text-secondary);font-size:.88rem;font-weight:600;cursor:pointer;transition:all .3s}.tab-pill:hover{border-color:rgba(var(--gold-rgb),.25);color:#fff;transform:none;box-shadow:none}.tab-pill.active{background:var(--primary-electric);border-color:var(--primary-electric);color:#000;box-shadow:none;transform:none}.tab-count{background:#00000026;padding:2px 8px;border-radius:50px;font-size:.75rem;font-weight:700;min-width:22px;text-align:center}.tab-pill.active .tab-count{background:#00000040;color:#000}.live-dot-sm{width:7px;height:7px;border-radius:50%;background:#d08a7e;animation:blink 1.4s infinite;box-shadow:none}@keyframes blink{0%,to{opacity:1}50%{opacity:.3}}.tourney-grid-section{max-width:1200px;margin:0 auto;padding:0 5% 80px;position:relative;z-index:1}.empty-state{text-align:center;padding:80px 20px;color:var(--text-secondary)}.empty-state svg{margin-bottom:16px;opacity:.3}.empty-state h3{margin-bottom:8px;color:#fff}.tourney-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:24px}.tcard{background:var(--navy-800);border:1px solid rgba(255,255,255,.05);border-radius:20px;padding:28px;display:flex;flex-direction:column;gap:12px;position:relative;transition:all .4s cubic-bezier(.4,0,.2,1);animation:cardIn .5s ease calc(var(--i, 0) * .04s) both}@keyframes cardIn{0%{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}.tcard:hover{transform:translateY(-6px);border-color:rgba(var(--gold-rgb),.2);box-shadow:0 16px 48px #00000059,0 0 40px rgba(var(--gold-rgb),.08)}.tcard.ongoing{border-color:#d08a7e33}.tcard.ongoing:hover{border-color:#d08a7e66;box-shadow:0 16px 48px #00000059,0 0 30px #d08a7e14}.tcard-top{display:flex;justify-content:space-between;align-items:flex-start}.tcard-top-left{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.tcard-top-right{display:flex;align-items:center;gap:8px}.fmt-badge{display:inline-flex;align-items:center;padding:4px 12px;border-radius:50px;font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:var(--fmt-color, var(--primary-electric));background:color-mix(in srgb,var(--fmt-color, var(--primary-electric)) 12%,transparent);border:1px solid color-mix(in srgb,var(--fmt-color, var(--primary-electric)) 25%,transparent)}.verify-badge{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border-radius:50px;font-size:.68rem;font-weight:700;text-transform:uppercase;letter-spacing:.6px}.verify-badge.verified{color:#8db38a;background:#8db38a14;border:1px solid rgba(141,179,138,.2)}.verify-badge.pending{color:var(--gold);background:rgba(var(--gold-rgb),.08);border:1px solid rgba(var(--gold-rgb),.2)}.live-badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:50px;font-size:.72rem;font-weight:700;color:#d08a7e;background:#d08a7e1a;border:1px solid rgba(208,138,126,.25);animation:pulseGlow 2s infinite}@keyframes pulseGlow{0%,to{box-shadow:0 0 #d08a7e4d}50%{box-shadow:0 0 0 6px #d08a7e00}}.live-dot{width:7px;height:7px;border-radius:50%;background:#d08a7e;animation:blink 1.4s infinite;box-shadow:none}.bookmark-btn{background:#ffffff0a;border:1px solid rgba(255,255,255,.08);border-radius:8px;width:32px;height:32px;display:flex;align-items:center;justify-content:center;color:var(--text-secondary);cursor:pointer;transition:all .25s;padding:0}.bookmark-btn:hover{transform:none;box-shadow:none;border-color:rgba(var(--gold-rgb),.3);color:var(--primary-electric)}.bookmark-btn.saved{color:var(--gold);border-color:rgba(var(--gold-rgb),.3);background:rgba(var(--gold-rgb),.08)}.tcard-title{font-size:1.2rem;font-weight:700;line-height:1.3}.tcard-meta{display:flex;flex-wrap:wrap;gap:14px;font-size:.82rem;color:var(--text-secondary)}.tcard-meta span{display:inline-flex;align-items:center;gap:5px}.tcard-stats{display:flex;gap:16px;flex-wrap:wrap}.tcard-stat{display:inline-flex;align-items:center;gap:6px;font-size:.82rem;font-weight:500;color:var(--text-secondary)}.tcard-stat svg{color:var(--primary-electric)}.tcard-fill{height:4px;background:#ffffff0d;border-radius:2px;overflow:hidden;margin-top:4px}.tcard-fill-inner{height:100%;background:var(--gold);border-radius:2px;transition:width .5s ease}.tcard-fill-label{font-size:.7rem;color:var(--text-secondary);text-align:right;display:block}.tcard-round{display:inline-flex;align-items:center;gap:6px;font-size:.82rem;color:#d08a7e;font-weight:600}.tcard-winner{display:inline-flex;align-items:center;gap:6px;font-size:.82rem;color:var(--gold);font-weight:600}.tcard-expand{display:inline-flex;align-items:center;gap:4px;background:transparent;border:none;color:var(--primary-electric);font-size:.8rem;font-weight:600;cursor:pointer;padding:4px 0;width:fit-content;transition:gap .2s}.tcard-expand:hover{gap:8px;transform:none;box-shadow:none}.tcard-expand .rotate{transform:rotate(90deg)}.tcard-details{padding:12px 0 0;border-top:1px solid rgba(255,255,255,.05);animation:slideDown .3s ease}.tcard-details p{font-size:.88rem;color:var(--text-secondary);line-height:1.6;margin-bottom:6px}.tcard-org{font-size:.78rem;color:#ffffff4d;font-style:italic}.tcard-website{display:inline-flex;align-items:center;gap:6px;font-size:.78rem;color:var(--primary-electric);font-weight:600;text-decoration:none;padding:5px 12px;border-radius:8px;background:rgba(var(--gold-rgb),.04);border:1px solid rgba(var(--gold-rgb),.1);width:fit-content;transition:all .3s}.tcard-website:hover{background:rgba(var(--gold-rgb),.1);border-color:rgba(var(--gold-rgb),.25)}.tcard-cta-wrapper{margin-top:auto;position:relative}.tcard-cta{width:100%;display:flex;align-items:center;justify-content:center;gap:8px;padding:12px;border-radius:12px;background:rgba(var(--gold-rgb),.08);border:1px solid rgba(var(--gold-rgb),.15);color:var(--primary-electric);font-weight:600;font-size:.88rem;cursor:pointer;transition:all .3s}.tcard-cta:hover:not(.disabled){background:var(--primary-electric);color:#000;box-shadow:none;transform:translateY(-2px)}.tcard-cta.disabled{opacity:.45;cursor:not-allowed;background:#ffffff08;border-color:#ffffff0f;color:var(--text-secondary)}.tcard.ongoing .tcard-cta{background:#d08a7e14;border-color:#d08a7e33;color:#d08a7e}.tcard.ongoing .tcard-cta:hover:not(.disabled){background:#d08a7e;color:#fff;box-shadow:none}.no-link-toast{position:absolute;bottom:calc(100% + 8px);left:50%;transform:translate(-50%);white-space:nowrap;background:#12121cf7;border:1px solid rgba(var(--gold-rgb),.3);color:var(--gold);font-size:.78rem;font-weight:600;padding:8px 14px;border-radius:50px;pointer-events:none;animation:toastIn .2s ease;z-index:10;box-shadow:0 4px 20px #0006}@keyframes toastIn{0%{opacity:0;transform:translate(-50%) translateY(6px)}to{opacity:1;transform:translate(-50%) translateY(0)}}.how-section{padding:80px 5%;position:relative;z-index:1}.steps-row{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;max-width:1100px;margin:0 auto}.step-card{background:var(--navy-800);border:1px solid rgba(255,255,255,.05);border-radius:20px;padding:36px 28px;text-align:center;position:relative;transition:all .4s cubic-bezier(.4,0,.2,1);animation:fadeInUp .5s ease calc(var(--delay, 0s) + .2s) both}.step-card:hover{transform:translateY(-6px);border-color:rgba(var(--gold-rgb),.2);box-shadow:0 12px 40px #0000004d,0 0 30px rgba(var(--gold-rgb),.06)}.step-num{font-size:.7rem;font-weight:700;color:var(--primary-electric);text-transform:uppercase;letter-spacing:2px;margin-bottom:16px;display:block}.step-icon{width:56px;height:56px;background:var(--gold-soft);border-radius:16px;display:flex;align-items:center;justify-content:center;color:var(--primary-electric);margin:0 auto 20px}.step-card h3{font-size:1.2rem;margin-bottom:8px}.step-card p{font-size:.88rem;color:var(--text-secondary);line-height:1.5}.tourney-cta{padding:100px 5%;position:relative;z-index:1;overflow:hidden}.tourney-cta-glow{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:800px;height:400px;background:none;pointer-events:none;animation:heroPulse 5s ease-in-out infinite}.tourney-cta-inner{text-align:center;max-width:620px;margin:0 auto;position:relative;z-index:2}.tourney-cta-inner h2{font-size:2.4rem;margin-bottom:14px}.tourney-cta-inner p{font-size:1.05rem;color:var(--text-secondary);margin-bottom:36px}.tourney-cta-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}.modal-overlay{position:fixed;inset:0;background:#000000b3;z-index:1000;display:flex;align-items:center;justify-content:center;padding:20px;animation:fadeIn .25s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.modal-box{background:var(--navy-800);border:1px solid 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fadeInUp{0%{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}@media(max-width:1024px){.steps-row{grid-template-columns:repeat(2,1fr)}.featured-content{flex-direction:column;gap:28px}.featured-right{flex-direction:row}}@media(max-width:768px){.tourney-hero{min-height:auto;padding:140px 5% 60px}.tourney-hero-title{font-size:2.2rem}.tourney-hero-stats{flex-direction:column;gap:14px}.tstat-divider{display:none}.tourney-grid,.steps-row,.modal-grid{grid-template-columns:1fr}.modal-box{padding:28px 20px}.featured-card{padding:28px 20px 24px}.featured-right{min-width:auto}.search-row{flex-direction:column}.tab-row{gap:6px}.tab-pill{padding:8px 16px;font-size:.82rem}.controls-header{flex-direction:column;align-items:flex-start;gap:10px}.lichess-grid{grid-template-columns:repeat(auto-fill,minmax(180px,1fr))}}@media(max-width:480px){.tourney-hero-actions{flex-direction:column;align-items:stretch}.tourney-hero-actions .btn-glow,.tourney-hero-actions 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8px;font-size:1.2rem}.legal-body p{margin:0 0 10px}.legal-body ul{margin:0 0 10px;padding-left:20px}.legal-body li{margin-bottom:6px}.legal-body strong{color:var(--ivory)}@media(max-width:820px){.legal-page{padding:16px}.legal-layout{grid-template-columns:minmax(0,1fr)}.legal-toc{position:static;display:none}}.setup-lesson{display:grid;grid-template-columns:minmax(0,560px) minmax(0,1fr);gap:32px;align-items:start;max-width:1100px;margin:0 auto;padding:24px 16px 48px}.setup-board-col{display:flex;flex-direction:column;gap:10px}.setup-tray{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:6px}.setup-tray-piece{position:relative;display:flex;align-items:center;justify-content:center;aspect-ratio:1 / 1;padding:4px;border:1px solid var(--border-color);border-radius:8px;background:var(--bg-raised);cursor:grab}.setup-tray-piece:hover:not(:disabled){background:var(--navy-600)}.setup-tray-piece.selected{border-color:var(--gold);box-shadow:0 0 0 2px 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svg{color:var(--gold)}.setup-reset{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;font-size:.88rem;border-color:var(--border-color);color:var(--slate)}.setup-panel .lesson-exit{justify-content:flex-start}.setup-panel .lesson-exit-note{text-align:left}@media(max-width:900px){.setup-lesson{grid-template-columns:minmax(0,1fr)}}.concept-lesson .lesson-view-content{max-width:1000px;margin:0 auto;padding:40px 20px;color:var(--text-primary, #fff)}.concept-lesson h1,.concept-lesson h2,.concept-lesson h3{color:var(--primary-purple, var(--gold));font-weight:700;letter-spacing:.5px;margin-top:30px}.puzzle-rush-page{overflow-x:hidden}.puzzle-rush-card{border:1px solid rgba(255,255,255,.05);box-shadow:0 12px 32px #00000059}.hud-timer-badge-vertical{background:rgba(var(--gold-rgb),.08);padding:30px;border-radius:30px;border:1px solid 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ease}.strike-dot.active{background:#d08a7e;box-shadow:none}.puzzle-info-card{padding:25px;background:rgba(var(--gold-rgb),.05);border-radius:24px}.topic-title{font-size:1.5rem;margin-bottom:10px;color:#f4efe4}.topic-meta{display:flex;gap:15px;font-size:.9rem;color:var(--text-secondary);margin-bottom:15px}.turn-indicator{font-weight:700;color:var(--primary-purple);text-transform:uppercase;letter-spacing:1px}.puzzle-feedback{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:5rem;font-weight:900;pointer-events:none;z-index:100}.back-link-btn{background:transparent;border:none;color:#7d8b9c;font-size:.9rem;margin-top:15px;cursor:pointer;width:100%;text-align:center;transition:color .3s}.back-link-btn:hover{color:#9ca9b8}.w-full{width:100%}.pr-board{width:min(560px,calc(100vh - 200px),60vw);min-width:280px}.rush-lobby{--rush-size: min( calc(100vh - 140px) , calc(100vw - 460px) , 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1fr;gap:12px;padding:0 20px 16px}.rush-lobby-stat{padding:14px 8px;border-radius:8px;background:#00000038;text-align:center}.rush-lobby-stat-value{display:flex;align-items:center;justify-content:center;gap:8px;font-size:1.5rem;font-weight:800;font-variant-numeric:tabular-nums}.rush-lobby-stat-value svg{color:var(--gold)}.rush-lobby-stat-label{margin-top:4px;font-size:.78rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--slate, #9ca9b8)}.rush-lobby-tabs{display:grid;grid-template-columns:1fr 1fr;border-bottom:1px solid var(--border-color, rgba(255, 255, 255, .08))}.rush-lobby-tabs button{padding:12px 0;border:none;border-bottom:3px solid transparent;border-radius:0;background:transparent;color:var(--slate, #9ca9b8);font-weight:700;font-size:.98rem;cursor:pointer}.rush-lobby-tabs button.active{color:var(--ivory, #f4efe4);border-bottom-color:var(--ivory, #f4efe4)}.rush-lobby-body{flex:1;overflow-y:auto;padding:24px 24px 12px}.rush-lobby-modes{display:flex;flex-direction:column;gap:12px}.rush-lobby-mode{display:flex;align-items:center;justify-content:center;gap:10px;padding:18px;border-radius:8px;border:2px solid transparent;background:#ffffff0f;color:var(--ivory, #f4efe4);font-size:1.1rem;font-weight:800;cursor:pointer;box-shadow:0 3px #0000004d;transition:background .15s ease,border-color .15s ease}.rush-lobby-mode:hover{background:#ffffff1a}.rush-lobby-mode.selected{border-color:var(--gold)}.rush-lobby-empty{margin:24px 0;text-align:center;color:var(--slate, #9ca9b8)}.rush-lobby-history{list-style:none;margin:0;padding:0}.rush-lobby-history li{display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-bottom:1px solid var(--border-color, rgba(255, 255, 255, .08))}.rush-lobby-history-score{font-weight:700}.rush-lobby-history-date{font-size:.78rem;color:var(--slate, #9ca9b8)}.rush-lobby-history-mode{font-weight:700;color:var(--gold)}.rush-lobby-play{margin:12px 24px 24px;padding:18px;border:none;border-radius:8px;background:var(--gold);color:var(--navy-900, #111722);font-size:1.4rem;font-weight:800;cursor:pointer;box-shadow:0 4px #00000059}.rush-lobby-play:hover{background:var(--gold-strong, var(--gold))}@media(max-width:900px){.rush-lobby{--rush-size: min( calc(100vw - 32px) , 560px);flex-direction:column;align-items:center;padding:16px}.rush-lobby-panel{width:var(--rush-size);height:auto;min-height:0}}.concept-lesson ol{text-align:left}.concept-lesson{background-color:var(--navy-900);color:#b9b2a4;font-family:Poppins,sans-serif;line-height:1.6;margin:0;padding:0}.concept-lesson h1,.concept-lesson h2,.concept-lesson h3{color:var(--gold);font-weight:700;letter-spacing:.5px;padding-top:15px}.concept-lesson ul{margin-left:20px}.concept-lesson .nav-bar{display:flex;justify-content:center;align-items:center;background-color:var(--navy-700);padding:15px 0;box-shadow:0 4px 12px #0006;position:sticky;top:0;z-index:100}.concept-lesson .nav-bar a{color:#b9b2a4;text-decoration:none;margin:0 20px;font-size:1.1em;padding:5px 10px;transition:color .3s ease,background-color .3s ease;border-radius:5px}.concept-lesson .nav-bar a:hover{color:var(--gold);background-color:rgba(var(--gold-rgb),.1)}.concept-lesson .how_pieces_move{max-width:900px;margin:0 auto;padding:40px 20px}.concept-lesson h1{font-size:2.5em;text-align:center;margin-bottom:5px;text-transform:uppercase}.concept-lesson h2{font-size:1.8em;margin-top:40px;margin-bottom:15px;color:#c39a4f;border-bottom:2px solid var(--navy-700);padding-bottom:5px}.concept-lesson p{font-size:1.05em;margin-bottom:20px;color:#b9b2a4;text-align:justify}.concept-lesson p:first-of-type{font-style:italic;color:#9ca9b8}.concept-lesson .image-container{text-align:center;margin:30px 0;padding:15px;background-color:var(--navy-700);border-radius:10px;box-shadow:0 8px 25px #000000b3,0 0 15px rgba(var(--gold-rgb),.2)}.concept-lesson .image-container img{max-width:100%;height:auto;display:block;margin:0 auto;border-radius:5px;border:1px solid var(--gold)}.concept-lesson .image-container:last-of-type img{width:48%;display:inline-block;margin:0 1%}.concept-lesson .najdorf{width:30%;height:30%}.concept-lesson .ButtonElements{text-align:center;margin-top:60px;margin-bottom:40px}.concept-lesson .ButtonElements button{background-color:var(--gold);color:var(--navy-900);border:none;padding:15px 30px;font-size:1.2em;font-weight:600;border-radius:50px;cursor:pointer;transition:background-color .3s ease,transform .1s ease,box-shadow .3s ease;box-shadow:0 5px 15px rgba(var(--gold-rgb),.4)}.concept-lesson .ButtonElements button:hover{background-color:#c39a4f;color:#fff;transform:translateY(-2px);box-shadow:0 8px 20px rgba(var(--gold-rgb),.6)}.concept-lesson .ButtonElements button:active{transform:translateY(0)}.concept-lesson .solution-dropdown{background-color:var(--navy-700);border-radius:8px;padding:10px 15px;margin:15px 0;box-shadow:0 4px 10px #0000004d;border-left:4px solid var(--gold)}.concept-lesson .solution-dropdown summary{font-weight:700;color:var(--gold);cursor:pointer;list-style:none;display:flex;align-items:center;font-size:1.1em;padding:5px 0;transition:color .3s ease}.concept-lesson .solution-dropdown summary:hover{color:#fff}.concept-lesson .solution-dropdown summary::-webkit-details-marker{display:none}.concept-lesson .solution-dropdown summary:before{content:"▶";display:inline-block;margin-right:10px;font-size:.8em;transition:transform .3s ease;color:inherit}.concept-lesson .solution-dropdown[open] summary:before{transform:rotate(90deg)}.concept-lesson .solution-dropdown p{margin-top:15px;margin-bottom:5px;color:#b9b2a4;font-size:1em}.concept-lesson .endgame-diagram{margin:18px 0 22px;width:min(360px,100%)}.concept-lesson .endgame-diagram-board{pointer-events:none}.concept-lesson .endgame-diagram figcaption{margin-top:8px;font-size:.88rem;color:var(--slate);line-height:1.45}.concept-lesson .endgame-rule{padding:12px 16px;margin:16px 0;border-radius:8px;background:var(--gold-soft);border-left:4px solid var(--gold)}.pb-board{width:min(480px,calc(100vh - 220px),100%);min-width:280px}.pb-turn{text-align:center;margin-bottom:6px;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--slate)}