:root{--cp-bg: #0d1117;--cp-bg-elev: #161b22;--cp-bg-hover: #21262d;--cp-surface: #1a2033;--cp-surface-soft: #232a3d;--cp-overlay: rgba(13, 17, 23, .78);--cp-border: #2a3142;--cp-border-strong: #3d4660;--cp-primary: #58a6ff;--cp-primary-strong: #1f6feb;--cp-primary-soft: rgba(31, 111, 235, .18);--cp-accent: #f5a623;--cp-accent-strong: #e94560;--cp-accent-soft: rgba(245, 166, 35, .18);--cp-grad-flame: linear-gradient(135deg, #e94560 0%, #f5a623 100%);--cp-grad-mind: linear-gradient(135deg, #1f6feb 0%, #c084fc 100%);--cp-grad-night: linear-gradient(180deg, #0d1117 0%, #1a2033 100%);--cp-success: #4caf50;--cp-danger: #f44336;--cp-warn: #ff9800;--cp-info: #58a6ff;--cp-gold: #f0c674;--cp-text: #e6edf3;--cp-text-strong: #ffffff;--cp-text-dim: #c9d1d9;--cp-text-muted: #8b949e;--cp-text-on-accent: #0d1117;--cp-font-sans: "Segoe UI", "Helvetica Neue", "Hiragino Sans", "Yu Gothic UI", Meiryo, system-ui, -apple-system, sans-serif;--cp-font-mono: "JetBrains Mono", "Fira Code", "Consolas", "Courier New", monospace;--cp-font-display: var(--cp-font-sans);--cp-fs-xs: .72rem;--cp-fs-sm: .85rem;--cp-fs-base: 1rem;--cp-fs-md: 1.15rem;--cp-fs-lg: 1.4rem;--cp-fs-xl: 1.75rem;--cp-fs-2xl: 2.2rem;--cp-fs-3xl: 2.8rem;--cp-fw-regular: 400;--cp-fw-medium: 500;--cp-fw-semi: 600;--cp-fw-bold: 700;--cp-fw-black: 800;--cp-tracking-tight: -.01em;--cp-tracking-normal: 0;--cp-tracking-wide: .04em;--cp-tracking-wider: .08em;--cp-tracking-display: .1em;--cp-leading-tight: 1.2;--cp-leading-base: 1.5;--cp-leading-loose: 1.7;--cp-space-1: 4px;--cp-space-2: 8px;--cp-space-3: 12px;--cp-space-4: 16px;--cp-space-5: 24px;--cp-space-6: 32px;--cp-space-7: 48px;--cp-space-8: 64px;--cp-radius-sm: 4px;--cp-radius-md: 8px;--cp-radius-lg: 12px;--cp-radius-xl: 18px;--cp-radius-pill: 999px;--cp-shadow-1: 0 1px 2px rgba(0,0,0,.3), 0 1px 3px rgba(0,0,0,.18);--cp-shadow-2: 0 4px 12px rgba(0,0,0,.35), 0 2px 4px rgba(0,0,0,.22);--cp-shadow-3: 0 12px 32px rgba(0,0,0,.45), 0 4px 8px rgba(0,0,0,.28);--cp-glow-primary: 0 0 18px rgba(31, 111, 235, .55);--cp-glow-accent: 0 0 22px rgba(245, 166, 35, .45);--cp-ease-out: cubic-bezier(.22, 1, .36, 1);--cp-ease-in: cubic-bezier(.55, 0, .78, 0);--cp-ease-std: cubic-bezier(.4, 0, .2, 1);--cp-dur-fast: .12s;--cp-dur-base: .2s;--cp-dur-slow: .36s;--cp-app-max-w: 500px;--cp-app-pad: var(--cp-space-5);--cp-banner-h: 60px}.cp-brand-title{font-family:var(--cp-font-display);font-weight:var(--cp-fw-bold);letter-spacing:var(--cp-tracking-display);background:var(--cp-grad-flame);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}.cp-brand-badge{display:inline-block;font-size:var(--cp-fs-xs);font-weight:var(--cp-fw-bold);letter-spacing:var(--cp-tracking-wider);color:var(--cp-accent);background:var(--cp-accent-soft);border:1px solid var(--cp-accent);padding:var(--cp-space-1) var(--cp-space-3);border-radius:var(--cp-radius-pill);text-transform:uppercase}:root{--bg: var(--cp-bg);--bg-elev: var(--cp-bg-elev);--bg-hover: var(--cp-bg-hover);--border: var(--cp-border);--border-strong: var(--cp-border-strong);--text: var(--cp-text);--text-dim: var(--cp-text-dim);--text-muted: var(--cp-text-muted);--accent: var(--cp-primary);--accent-strong: var(--cp-primary-strong);--accent-bg: var(--cp-primary-soft);--gold: var(--cp-gold);--focus: #79c0ff}*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:var(--bg);color:var(--text);height:100vh;overflow:hidden;touch-action:manipulation;overflow-x:hidden}:focus-visible{outline:2px solid var(--focus);outline-offset:2px}button:focus:not(:focus-visible){outline:none}#app{display:flex;height:100vh}#sidebar{width:280px;min-width:280px;background:var(--bg-elev);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden}.sidebar-header{padding:16px 20px 12px;border-bottom:1px solid var(--border)}.logo{font-size:1.25rem;font-weight:700;letter-spacing:.04em;display:flex;align-items:center;gap:8px;color:var(--text)}.logo-mark{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;background:linear-gradient(135deg,var(--accent-strong),#6ea8fe);color:#fff;border-radius:7px;font-weight:800;font-size:1rem;box-shadow:0 0 12px #1f6feb66;animation:logo-pulse 3.2s ease-in-out infinite}@keyframes logo-pulse{0%,to{box-shadow:0 0 8px #1f6feb59}50%{box-shadow:0 0 18px #1f6febb3}}.logo-text{color:var(--text)}.logo-accent{color:var(--accent)}.sidebar-tagline{font-size:.72rem;color:var(--text-muted);margin-top:6px;letter-spacing:.02em}#game-list{flex:1;overflow-y:auto;padding:8px;outline:none}.list-section-label{font-size:.65rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);padding:10px 8px 4px}.game-btn{display:flex;align-items:center;gap:10px;width:100%;padding:10px 12px;margin-bottom:4px;background:transparent;border:1px solid transparent;border-radius:8px;color:var(--text-dim);cursor:pointer;text-align:left;transition:background .15s ease,border-color .15s ease,transform .15s ease}.game-btn:hover{background:var(--bg-hover);border-color:var(--border);transform:translate(2px)}.game-btn.active{background:var(--accent-bg);border-color:var(--accent-strong);color:var(--accent)}.game-btn.kb-focus{border-color:var(--focus);background:var(--bg-hover)}.game-info{display:flex;flex-direction:column;flex:1;min-width:0}.game-title{font-size:.9rem;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.game-concept{font-size:.7rem;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.game-meta{display:flex;align-items:center;gap:8px}.fav-btn{background:transparent;border:none;color:var(--border-strong);cursor:pointer;font-size:.95rem;line-height:1;padding:2px 4px;border-radius:4px;transition:color .15s ease,transform .15s ease}.fav-btn:hover{color:var(--gold);transform:scale(1.15)}.fav-btn.active{color:var(--gold)}#main{flex:1;position:relative;background:var(--bg)}#placeholder{display:flex;align-items:center;justify-content:center;height:100%;padding:40px 24px;overflow-y:auto}.hero{max-width:560px;text-align:center;animation:hero-fade .6s ease}@keyframes hero-fade{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.hero-badge{display:inline-block;font-size:.7rem;font-weight:700;letter-spacing:.18em;color:var(--accent);background:var(--accent-bg);padding:4px 10px;border-radius:999px;border:1px solid var(--accent-strong);margin-bottom:18px;font-family:var(--cp-font-display)}.hero-title{font-size:2rem;font-weight:700;letter-spacing:.01em;color:var(--text);line-height:1.3;margin-bottom:10px}.hero-accent{background:var(--cp-grad-flame);-webkit-background-clip:text;background-clip:text;color:transparent}.hero-sub{font-size:.95rem;color:var(--text-muted);margin-bottom:26px;line-height:1.55}.hero-hint{margin-top:22px;font-size:.78rem;color:var(--text-muted)}.hero-hint kbd{display:inline-block;background:var(--bg-elev);border:1px solid var(--border);border-bottom-width:2px;border-radius:4px;padding:1px 6px;font-family:inherit;font-size:.72rem;margin:0 2px;color:var(--text-dim)}#game-frame{display:none;width:100%;height:100%;border:none;background:#000}#game-list::-webkit-scrollbar{width:6px}#game-list::-webkit-scrollbar-track{background:transparent}#game-list::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}#game-list::-webkit-scrollbar-thumb:hover{background:var(--border-strong)}#sidebar-toggle{display:none;position:fixed;top:8px;left:8px;z-index:1000;background:var(--bg-elev);color:var(--text);border:1px solid var(--border);border-radius:6px;font-size:1.5rem;width:44px;height:44px;min-height:44px;cursor:pointer;align-items:center;justify-content:center;line-height:1;padding:0}@media(max-width:768px){#sidebar-toggle{display:flex}#app{flex-direction:column;height:100vh}#sidebar{position:fixed;top:0;left:0;width:100%;min-width:unset;height:auto;max-height:70vh;border-right:none;border-bottom:1px solid var(--border);flex-direction:column;z-index:999;transform:translateY(-100%);transition:transform .25s ease;padding-top:52px}#sidebar.open{transform:translateY(0)}.sidebar-header{display:none}#game-list{display:flex;flex-direction:row;flex-wrap:nowrap;gap:4px;padding:4px 8px;overflow-x:auto;overflow-y:hidden;-webkit-overflow-scrolling:touch;scrollbar-width:none}#game-list::-webkit-scrollbar{display:none}.list-section-label{display:none}.game-btn{flex:0 0 auto;width:auto;min-width:48px;min-height:48px;padding:6px 10px;justify-content:center}.game-info,.game-concept,.game-meta{display:none}#main{flex:1;width:100%;height:calc(100vh - 52px);margin-top:0}#game-frame{width:100%;height:calc(100vh - 52px)}#placeholder{font-size:.9rem;padding-top:60px}.hero-title{font-size:1.4rem}.hero-sub{font-size:.85rem}}@media(prefers-contrast:more){:root{--border: #ffffff;--border-strong: #ffffff;--text-dim: #ffffff;--text-muted: #e6e6e6;--focus: #ffd400}.game-btn{border-color:var(--border)}.game-btn.active{outline:2px solid #fff;outline-offset:-2px}}