:root{--bg: #f4f6f8;--surface: #ffffff;--surface-2: #eef2f5;--text: #16212b;--muted: #5a6b7a;--border: #d3dbe2;--accent: #0f766e;--accent-soft: #d7f0ec;--danger: #b42318;--danger-soft: #fdeceb;--warn: #8a5a00;--warn-soft: #fdf3d8;--radius: 10px;--mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", Menlo, monospace}@media(prefers-color-scheme:dark){:root{--bg: #10161c;--surface: #18212a;--surface-2: #1f2a35;--text: #e6edf3;--muted: #9bacbb;--border: #2d3a47;--accent: #2dd4bf;--accent-soft: #123b38;--danger: #ff8a80;--danger-soft: #3d1a17;--warn: #f0c04a;--warn-soft: #3a2f12}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:IBM Plex Sans Thai,Noto Sans Thai,system-ui,-apple-system,Segoe UI,sans-serif;font-size:15px;line-height:1.5}.app{max-width:1240px;margin:0 auto;padding:12px 12px 64px}.deck,.pair{display:grid;gap:10px;align-items:start}.pair.split-65{grid-template-columns:65fr 35fr}.pair.split-50{grid-template-columns:1fr 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