@font-face{font-family:Satoshi;src:url(/fonts/satoshi-400.woff2) format("woff2");font-weight:400;font-display:swap;font-style:normal}@font-face{font-family:Satoshi;src:url(/fonts/satoshi-500.woff2) format("woff2");font-weight:500;font-display:swap;font-style:normal}@font-face{font-family:Satoshi;src:url(/fonts/satoshi-700.woff2) format("woff2");font-weight:600 700;font-display:swap;font-style:normal}:root{--sidebar-width: 280px;--aside-panel-width: 300px;--color-bg: #0a0a0b;--color-surface: #121214;--color-surface-raised: #17171a;--color-border: #26262a;--color-border-subtle: #1d1d20;--color-border-strong: #3a3a40;--color-text: #f4f4f5;--color-text-secondary: #a1a1aa;--color-text-muted: #71717a;--color-accent: #09090b;--color-accent-light: #121214;--color-highlight: #3b82f6;--color-highlight-hover: #60a5fa;--color-highlight-light: rgba(59, 130, 246, .12);--color-highlight-subtle: rgba(59, 130, 246, .08);--color-gradient: #3b82f6;--color-gradient-hover: #2563eb;--sidebar-bg: var(--color-bg);--sidebar-bg-hover: rgba(255, 255, 255, .05);--sidebar-bg-active: rgba(255, 255, 255, .07);--sidebar-text: #e7e9ea;--sidebar-text-hover: #f4f4f5;--sidebar-text-active: #f4f4f5;--sidebar-border: rgba(255, 255, 255, .06);--color-success: #10b981;--color-warning: #f59e0b;--color-error: #ef4444;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 14px;--radius-xl: 12px;--transition: .18s cubic-bezier(.4, 0, .2, 1)}:root{--aura-1: rgba(59, 130, 246, .1);--aura-2: rgba(20, 184, 166, .05)}[data-theme=light]{--color-bg: #f6f8fc;--color-surface: #ffffff;--color-surface-raised: #ffffff;--color-border: #e3e8f0;--color-border-subtle: #eef2f7;--color-border-strong: #c7d2e1;--color-text: #0f172a;--color-text-secondary: #475569;--color-text-muted: #64748b;--color-accent: #f1f5fb;--color-accent-light: #eaf0fa;--color-highlight: #1f6bff;--color-highlight-hover: #0f56e0;--color-highlight-light: rgba(31, 107, 255, .1);--color-highlight-subtle: rgba(31, 107, 255, .06);--color-gradient: #1f6bff;--color-gradient-hover: #0f56e0;--color-success: #059669;--color-warning: #d97706;--color-error: #dc2626;--sidebar-bg: var(--color-bg);--sidebar-bg-hover: rgba(15, 23, 42, .05);--sidebar-bg-active: rgba(31, 107, 255, .1);--sidebar-text: #0f1419;--sidebar-text-hover: #0f172a;--sidebar-text-active: #0f56e0;--sidebar-border: #e3e8f0}[data-theme=light]{--aura-1: rgba(31, 107, 255, .09);--aura-2: rgba(13, 148, 136, .06)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}*{scrollbar-width:thin;scrollbar-color:#27272a transparent}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#27272a;border-radius:100px;border:2px solid var(--color-bg)}::-webkit-scrollbar-thumb:hover{background:#3f3f46}::-webkit-scrollbar-corner{background:transparent}body{font-family:Satoshi,-apple-system,BlinkMacSystemFont,Segoe 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var(--transition)}.switch-input:checked{background-color:var(--color-highlight);background-position:16px 0}.switch-input:focus-visible{outline:none;box-shadow:0 0 0 3px var(--color-highlight-light)}.switch-input:disabled{cursor:not-allowed;opacity:.5}.switch:has(.switch-input:disabled){cursor:not-allowed;color:var(--color-text-muted)}.range{--range-progress: 50%;width:100%;height:20px;margin:0;background:transparent;appearance:none;-webkit-appearance:none;cursor:pointer}.range:focus{outline:none}.range::-webkit-slider-runnable-track{height:6px;border-radius:100px;background:linear-gradient(to right,var(--color-highlight) var(--range-progress),var(--color-border) var(--range-progress))}.range::-moz-range-track{height:6px;border-radius:100px;background:var(--color-border)}.range::-moz-range-progress{height:6px;border-radius:100px;background:var(--color-highlight)}.range::-webkit-slider-thumb{width:18px;height:18px;margin-top:-6px;background:#fff;border:2px solid var(--color-highlight);border-radius:50%;-webkit-appearance:none;transition:transform var(--transition),box-shadow var(--transition)}.range::-moz-range-thumb{width:14px;height:14px;background:#fff;border:2px solid var(--color-highlight);border-radius:50%;transition:transform var(--transition),box-shadow var(--transition)}.range:hover::-webkit-slider-thumb{transform:scale(1.1)}.range:hover::-moz-range-thumb{transform:scale(1.1)}.range:focus-visible::-webkit-slider-thumb{box-shadow:0 0 0 4px var(--color-highlight-light)}.range:focus-visible::-moz-range-thumb{box-shadow:0 0 0 4px var(--color-highlight-light)}.range-value{font-size:13px;font-weight:500;font-variant-numeric:tabular-nums;color:var(--color-text-secondary)}.file-input{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.file{position:relative;display:flex;align-items:center;gap:12px;min-width:0;padding:6px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);cursor:pointer;transition:border-color var(--transition),box-shadow var(--transition)}.file:hover{border-color:var(--color-border-strong)}.file:focus-within{border-color:var(--color-highlight);box-shadow:0 0 0 3px var(--color-highlight-light)}.file-name{overflow:hidden;font-size:14px;color:var(--color-text-muted);text-overflow:ellipsis;white-space:nowrap}.file.has-file .file-name{color:var(--color-text)}.file-drop{position:relative;display:grid;justify-items:center;gap:8px;padding:32px 24px;text-align:center;background:var(--color-surface);border:1.5px dashed var(--color-border-strong);border-radius:var(--radius-lg);cursor:pointer;transition:border-color var(--transition),background var(--transition),box-shadow var(--transition)}.file-drop:hover,.file-drop.is-dragover{border-color:var(--color-highlight);background:var(--color-highlight-subtle)}.file-drop:focus-within{border-color:var(--color-highlight);box-shadow:0 0 0 3px var(--color-highlight-light)}.file-drop-icon{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;margin-bottom:4px;color:var(--color-highlight);background:var(--color-highlight-light);border-radius:50%;transition:transform var(--transition)}.file-drop:hover .file-drop-icon,.file-drop.is-dragover .file-drop-icon{transform:translateY(-2px)}.file-drop-title{font-size:14px;font-weight:500;line-height:1.4;color:var(--color-text)}.file-drop-title u{color:var(--color-highlight);text-decoration-thickness:1px;text-underline-offset:3px}.file-drop-hint{font-size:13px;line-height:1.45;color:var(--color-text-muted)}.file-drop-name:empty{display:none}.file-drop-name{margin-top:4px;padding:4px 12px;font-size:13px;font-weight:500;color:var(--color-highlight);background:var(--color-highlight-light);border-radius:100px}.btn{display:inline-flex;flex-shrink:0;align-items:center;justify-content:center;gap:8px;height:44px;margin:0;padding:0 20px;font:inherit;font-size:14px;font-weight:500;line-height:1;color:var(--color-text);text-decoration:none;white-space:nowrap;background:transparent;border:1px solid transparent;border-radius:100px;cursor:pointer;transition:background var(--transition),border-color var(--transition),color var(--transition),box-shadow var(--transition),transform var(--transition)}.prose a.btn{text-decoration:none;font-weight:500}.btn:active:not(:disabled){transform:scale(.97)}.btn:focus-visible{outline:none;box-shadow:0 0 0 3px var(--color-highlight-light)}.btn:disabled{cursor:not-allowed;opacity:.5}.btn-primary,.prose a.btn-primary{color:#fff;background:var(--color-highlight)}.btn-primary:hover:not(:disabled),.prose a.btn-primary:hover{color:#fff;background:var(--color-gradient-hover)}.btn-secondary,.prose a.btn-secondary{color:var(--color-text);border-color:var(--color-border)}.btn-secondary:hover:not(:disabled),.prose a.btn-secondary:hover{color:var(--color-text);border-color:var(--color-text-muted);background:var(--color-highlight-subtle)}.btn-ghost,.prose a.btn-ghost{color:var(--color-text-secondary)}.btn-ghost:hover:not(:disabled),.prose a.btn-ghost:hover{color:var(--color-text);background:var(--sidebar-bg-hover)}.btn-danger{color:#fff;background:var(--color-error)}.btn-danger:hover:not(:disabled){background:color-mix(in srgb,var(--color-error) 85%,#000)}.prose :is(.field-hint,.field-message,.form p){margin:0}.captcha{width:300px;max-width:100%;min-height:65px}.copy-box{display:flex;align-items:center;gap:12px;min-width:0;padding:6px 6px 6px 16px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:100px}.copy-box-icon{display:inline-flex;flex-shrink:0;color:var(--color-highlight)}.copy-box-value{flex:1;min-width:0;overflow:hidden;font-size:15px;font-weight:500;line-height:1.4;color:var(--color-text);text-overflow:ellipsis;white-space:nowrap}.copy-box :is(.copy-idle,.copy-done){display:inline-flex;align-items:center;gap:6px}.copy-box .copy-done,.copy-box.is-copied .copy-idle{display:none}.copy-box.is-copied .copy-done{display:inline-flex}.copy-box.is-copied .btn{color:var(--color-success);border-color:var(--color-success)}.btn-sm{height:34px;padding:0 14px;font-size:13px}.btn-lg{height:52px;padding:0 28px;font-size:15px}.btn-icon{width:44px;padding:0}.btn-sm.btn-icon{width:34px}@media(max-width:768px){.form-row{grid-template-columns:1fr}.form-actions{justify-content:stretch}.form-actions .btn{flex:1}}[data-theme=light] .sidebar-links a{color:#64748b}[data-theme=light] .sidebar-links a:hover{color:#1f6bff}[data-theme=light] .click-area{background:radial-gradient(ellipse 80% 70% at 50% 0%,rgba(31,107,255,.07),transparent 70%),#fff;box-shadow:0 1px 2px #0f172a0a,0 8px 24px -8px #1f6bff1f}[data-theme=light] .click-area:hover{border-color:#c7d2e1}[data-theme=light] .click-area:before{background-image:radial-gradient(rgba(31,107,255,.14) 1px,transparent 1px)}[data-theme=light] .click-area:after{background:radial-gradient(ellipse at center,transparent 20%,#ffffff 85%)}[data-theme=light] .game-icon{background:#1f6bff14;border-color:#1f6bff2e;color:#1f6bff}[data-theme=light] .click-area:hover .game-icon{background:#1f6bff1f;border-color:#1f6bff52;color:#0f56e0}[data-theme=light] .modal-backdrop{background:#0f172a4d}[data-theme=light] .modal{box-shadow:0 24px 64px -12px #0f172a33}[data-theme=light] .restart-btn{box-shadow:0 1px 2px #0f172a14,0 4px 12px -2px #1f6bff59}[data-theme=light] .game-reset,[data-theme=light] .sound-toggle,[data-theme=light] .fullscreen-btn,[data-theme=light] .duration-trigger,[data-theme=light] .difficulty-trigger,[data-theme=light] .theme-toggle{background:#fff;box-shadow:0 1px 2px #0f172a0d}[data-theme=light] .duration-menu,[data-theme=light] .difficulty-menu{box-shadow:0 12px 32px -8px #0f172a2e}[data-theme=light] .hero-stats{--hero-stat-color: rgb(83, 100, 113)}[data-theme=light] .prose{color:#0f1419}[data-theme=light] .chat-fab{background:#fff;color:#0f1419;border-color:#e3e8f0;box-shadow:0 8px 24px #0f172a1f,0 1px 2px #0f172a0f}[data-theme=light] .chat-fab:hover{background:#f6f8fc;box-shadow:0 12px 32px #0f172a29,0 1px 2px #0f172a0f}[data-theme=light] .chat-fab .discussion-dot{border-color:#fff}[data-theme=light] .chat-panel{background:#fff;border-color:#e3e8f0;box-shadow:0 24px 48px #0f172a2e,0 2px 6px #0f172a0f}[data-theme=light] .chat-panel-close{background:#0f172a0f;color:#0f1419}[data-theme=light] .chat-panel-close:hover{background:#0f172a1f}[data-theme=light] .prose thead{background:#f1f5fb}@media(min-width:769px){[data-theme=light] .prose table{box-shadow:0 1px 2px #0f172a0a}}[data-theme=light] .history-item,[data-theme=light] .game-stat{border-color:var(--color-border)}[data-theme=light] .mobile-header{background:#ffffffd9;backdrop-filter:blur(12px);border-color:#e3e8f0}[data-theme=light] .mobile-overlay{background:#0f172a4d}[data-theme=light] .lang-menu{box-shadow:0 -8px 24px -8px #0f172a26}[data-theme=light] .history-item:hover,[data-theme=light] .nav-subitem:hover{border-color:var(--color-border)}.theme-toggle{position:absolute;top:16px;right:16px;width:40px;height:40px;border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface);display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--color-text-secondary);transition:all var(--transition);z-index:10}.theme-toggle:hover{background:var(--color-surface-raised);color:var(--color-text);border-color:var(--color-highlight)}.theme-toggle .icon-sun,.theme-toggle .icon-moon{width:20px;height:20px}.theme-toggle .icon-sun{display:none}.theme-toggle .icon-moon,[data-theme=light] .theme-toggle .icon-sun{display:block}[data-theme=light] .theme-toggle .icon-moon{display:none}.sidebar{position:sticky;top:0;width:var(--sidebar-width);min-width:var(--sidebar-width);height:100vh;background:var(--sidebar-bg);border-right:1px 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var(--transition)}.nav-item:hover{background:var(--sidebar-bg-hover);color:var(--sidebar-text-hover)}.nav-item.active{background:var(--sidebar-bg-active);color:var(--sidebar-text-active)}.nav-item svg{flex-shrink:0;width:22px;height:22px}.online-count{display:flex;align-items:center;gap:8px;margin-top:auto;padding:8px 14px 0;font-size:13px;font-weight:500;line-height:1.5;color:var(--color-success);visibility:hidden}.online-count.is-ready{visibility:visible}.online-dot{position:relative;width:8px;height:8px;border-radius:50%;background:var(--color-success);flex-shrink:0}.online-dot:after{content:"";position:absolute;inset:0;border-radius:50%;background:var(--color-success);animation:onlinePulse 2s ease-out infinite}@keyframes 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.discussion-dot{position:absolute;top:-3px;right:-3px;border:2px solid #0a0a0b;box-sizing:content-box}@media(max-width:640px){.chat-fab{left:16px;bottom:16px;width:48px;height:48px;border-radius:14px}}@media(min-width:769px){.chat-fab{display:none}}.chat-fab.is-hidden{opacity:0;pointer-events:none;transform:scale(.9)}.chat-panel{position:fixed;left:24px;bottom:24px;z-index:310;width:min(400px,calc(100vw - 32px));height:min(500px,calc(100dvh - 32px));background:#0a0a0b;border:1px solid rgba(255,255,255,.08);border-radius:16px;box-shadow:0 24px 48px #00000073;overflow:hidden;transform-origin:bottom left;animation:chat-panel-in .22s ease-out}.chat-panel[hidden]{display:none}.chat-panel-body{width:100%;height:100%}.chat-panel-body iframe{display:block;width:100%;height:100%;border:0}.chat-panel-close{position:absolute;top:12px;right:12px;z-index:1;display:flex;align-items:center;justify-content:center;width:32px;height:32px;padding:0;background:#ffffff14;color:#fff;border:none;border-radius:10px;cursor:pointer;transition:background var(--transition),transform var(--transition)}.chat-panel-close:hover{background:#ffffff29}.chat-panel-close:active{transform:scale(.94)}.chat-panel-close:focus-visible{outline:2px solid #3b82f6;outline-offset:2px}@keyframes chat-panel-in{0%{opacity:0;transform:translateY(8px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}@media(max-width:640px){.chat-panel{left:16px;bottom:16px}}.sidebar-footer{padding:10px 12px;border-top:1px solid var(--sidebar-border)}.lang-wrapper{position:relative}.lang-selector{display:flex;align-items:center;gap:8px;padding:8px 12px;border-radius:var(--radius-sm);font-size:13px;color:var(--sidebar-text);cursor:pointer;transition:all var(--transition)}.lang-selector:hover{background:var(--sidebar-bg-hover);color:var(--sidebar-text-hover)}.lang-chevron{margin-left:auto;transition:transform var(--transition)}.lang-wrapper.open .lang-chevron{transform:rotate(180deg)}.lang-menu{position:absolute;bottom:100%;left:0;right:0;margin-bottom:4px;background:var(--color-surface);border:1px solid var(--sidebar-border);border-radius:var(--radius-sm);padding:4px;box-shadow:0 -4px 16px #0006;list-style:none}.lang-menu.hidden{display:none}.lang-option{display:block;width:100%;padding:7px 12px;border-radius:6px;font-size:13px;font-weight:500;color:var(--sidebar-text);text-decoration:none;text-align:left;cursor:pointer;transition:all var(--transition)}.lang-option:hover{background:var(--sidebar-bg-hover);color:var(--sidebar-text-hover)}.lang-option.active{background:var(--sidebar-bg-active);color:var(--sidebar-text-active);font-weight:600}.sidebar-links{list-style:none;margin-top:10px;padding:12px 12px 0;border-top:1px solid var(--sidebar-border);display:flex;flex-wrap:wrap;gap:4px 10px}.sidebar-links a{font-size:12px;color:#71767b;text-decoration:none;transition:color var(--transition)}.sidebar-links a:hover{color:#e7e9ea}.aside-panel{position:sticky;top:0;width:var(--aside-panel-width);min-width:var(--aside-panel-width);height:100vh;border-left:1px solid var(--color-border);display:flex;flex-direction:column;z-index:100;transition:margin .3s ease,min-width .3s ease;flex-shrink:0}.toc-header{padding:24px 20px 16px;border-bottom:1px solid var(--color-border)}.toc-title{font-size:16px;font-weight:600;letter-spacing:-.02em;color:var(--color-text)}.toc-nav{flex:1;padding:12px 16px;overflow-y:auto;scrollbar-width:none}.toc-nav::-webkit-scrollbar{display:none}.toc-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}.toc-link{display:block;padding:8px 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var(--transition)}.history-tab:hover{background:var(--color-surface);color:var(--color-text)}.history-tab.active{background:var(--color-highlight-subtle);color:var(--color-highlight)}.history-list{flex:1;padding:12px 16px;overflow-y:auto;display:flex;flex-direction:column;gap:8px;scrollbar-width:none;-ms-overflow-style:none}.history-list::-webkit-scrollbar{display:none}.history-list.hidden{display:none}.history-empty{display:flex;flex-direction:column;align-items:center;gap:8px;padding:24px 8px 16px;text-align:center}.history-empty-icon{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;color:var(--color-text-muted);background:var(--color-highlight-subtle)}.history-empty p{margin:0;font-size:13px;font-weight:500;line-height:1.5;color:var(--color-text-muted)}.history-item{display:flex;align-items:center;gap:8px;padding:8px 12px;border-bottom:1px solid var(--color-border-subtle);border-radius:var(--radius-sm);transition:all 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var(--transition)}.sound-toggle:hover{background:var(--color-surface);color:var(--color-text);border-color:var(--color-border-strong)}.sound-toggle.muted{color:var(--color-text-muted)}.hero{margin-top:10px;margin-bottom:32px}.hero h1{font-size:clamp(20px,2.6vw,26px);font-weight:600;letter-spacing:-.03em;line-height:1.15;color:var(--color-text);margin-bottom:8px}.hero h1 .highlight{color:inherit}.hero-subtitle{font-size:15px;line-height:1.45;color:#71767b;max-width:480px}.hero-stats{--hero-stat-color: rgb(113, 118, 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svg{flex-shrink:0}.difficulty-current{font-size:13px;font-weight:600;min-width:40px}.difficulty-caret{transition:transform .2s ease}.difficulty-toggle:checked+.difficulty-trigger{background:var(--color-surface);color:var(--color-text);border-color:var(--color-border-strong)}.difficulty-toggle:checked+.difficulty-trigger .difficulty-caret{transform:rotate(180deg)}.difficulty-menu{position:absolute;top:calc(100% + 4px);left:0;min-width:100px;max-height:calc(100vh - 200px);overflow-y:auto;margin:0;padding:4px;list-style:none;background:var(--color-surface-raised);border:1px solid var(--color-border);border-radius:var(--radius-sm);box-shadow:0 8px 24px #0000001f;opacity:0;transform:translateY(-4px);pointer-events:none;transition:opacity .18s ease,transform .18s ease;z-index:7}.difficulty-toggle:checked~.difficulty-menu{opacity:1;transform:translateY(0);pointer-events:auto}.difficulty-option{display:block;width:100%;padding:8px 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