:root{--void: #0a0a0f;--surface-1: rgba(20, 20, 35, .85);--surface-2: rgba(30, 30, 50, .65);--surface-3: rgba(40, 40, 65, .45);--border: rgba(80, 80, 120, .25);--border-hover: rgba(120, 120, 170, .4);--text-primary: #e8e4df;--text-secondary: #9a96a6;--text-muted: #5e5a6e;--accent: #c8a84e;--accent-dim: rgba(200, 168, 78, .15);--accent-glow: rgba(200, 168, 78, .3);--danger: #c45050;--success: #50a060;--board-wood: #c8a255;--board-wood-dark: #a8853a;--board-line: #3a3020;--stone-black: #1a1a1a;--stone-black-highlight: #3a3a3a;--stone-white: #e8e4df;--stone-white-shadow: #b0ac9f;--font-ui: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;--font-serif: "Noto Serif", Georgia, serif;--nav-height: 56px;--max-width: 960px;--radius-sm: 6px;--radius-md: 12px;--radius-lg: 20px;--ease-out-expo: cubic-bezier(.16, 1, .3, 1);--ease-in-out: cubic-bezier(.4, 0, .2, 1)}[data-theme=light]{--void: #f2efe8;--surface-1: rgba(255, 255, 255, .9);--surface-2: rgba(240, 237, 230, .8);--surface-3: rgba(230, 226, 218, .6);--border: rgba(0, 0, 0, .08);--border-hover: rgba(0, 0, 0, .15);--text-primary: #1a1a20;--text-secondary: #5a5a66;--text-muted: #9a9aa0;--accent: #9a7a2a;--accent-dim: rgba(154, 122, 42, .1);--accent-glow: rgba(154, 122, 42, .2)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;-webkit-tap-highlight-color:transparent}body{font-family:var(--font-ui);background-color:var(--void);color:var(--text-primary);line-height:1.6;overflow-x:hidden;min-height:100vh;min-height:100dvh}#root{min-height:100vh;min-height:100dvh;display:flex;flex-direction:column}a{color:var(--accent);text-decoration:none;transition:opacity .2s}a:hover{opacity:.8}button{font-family:var(--font-ui);cursor:pointer;border:none;background:none;color:inherit}input,textarea,select{font-family:var(--font-ui);color:var(--text-primary);background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:10px 14px;font-size:.95rem;outline:none;transition:border-color .2s}input:focus,textarea:focus,select:focus{border-color:var(--accent)}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--surface-3);border-radius:3px}.page-container{flex:1;width:100%;max-width:var(--max-width);margin:0 auto;padding:calc(var(--nav-height) + 24px) 20px 40px}.glass-card{background:var(--surface-1);border:1px solid var(--border);border-radius:var(--radius-md);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px)}.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 28px;background:var(--accent);color:#0a0a0f;font-weight:600;font-size:.95rem;border-radius:var(--radius-sm);transition:transform .15s var(--ease-out-expo),box-shadow .15s;letter-spacing:.02em}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 20px var(--accent-glow)}.btn-primary:active{transform:translateY(0)}.btn-secondary{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 28px;background:var(--surface-2);border:1px solid var(--border);color:var(--text-primary);font-weight:500;font-size:.95rem;border-radius:var(--radius-sm);transition:border-color .2s,background .2s}.btn-secondary:hover{border-color:var(--border-hover);background:var(--surface-3)}.section-title{font-family:var(--font-serif);font-size:1.8rem;font-weight:700;margin-bottom:8px;letter-spacing:-.02em}.section-subtitle{color:var(--text-secondary);font-size:1rem;margin-bottom:32px}.go-board-grid{display:grid;position:relative}.go-intersection{position:relative;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background .1s}.go-intersection:hover{background:#c8a84e14}.go-intersection:before,.go-intersection:after{content:"";position:absolute;background:var(--board-line)}.go-intersection:before{width:100%;height:1px;top:50%;left:0}.go-intersection:after{height:100%;width:1px;left:50%;top:0}.go-intersection.edge-top:after{top:50%;height:50%}.go-intersection.edge-bottom:after{height:50%}.go-intersection.edge-left:before{left:50%;width:50%}.go-intersection.edge-right:before{width:50%}.go-star-point{position:absolute;width:6px;height:6px;background:var(--board-line);border-radius:50%;z-index:1;pointer-events:none}@media (max-width: 600px){.page-container{padding:calc(var(--nav-height) + 16px) 14px 32px}.section-title{font-size:1.4rem}}