:root{--bg: #f6f8fb;--panel: #fff;--ink: #1c2433;--muted: #667085;--line: #e3e8ef;--soft: #eef2f7;--brand: #2563eb;--brand-d: #1d4ed8;--frame: #f59e0b;--frame-bg: #fff8e6}@media (prefers-color-scheme: dark){:root{--bg: #0e1420;--panel: #161e2e;--ink: #e6eaf2;--muted: #94a0b8;--line: #26314a;--soft: #1d2740;--brand: #6b9bff;--brand-d: #8db1ff;--frame: #fbbf24;--frame-bg: #2d2410}}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 system-ui,Segoe UI,Noto Sans Thai,sans-serif}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}code{background:var(--soft);padding:1px 6px;border-radius:5px;font-size:.92em}.muted{color:var(--muted)}.small{font-size:14px}.grow{flex:1}.btn{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border:1px solid var(--line);border-radius:9px;background:var(--panel);color:var(--ink);font:inherit;font-size:14px;cursor:pointer}.btn:hover{background:var(--soft);text-decoration:none}.btn:disabled{opacity:.45;cursor:default}.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}.btn.primary:hover{background:var(--brand-d)}.btn.lg{padding:11px 22px;font-size:16px}button.inline,button.link{background:none;border:0;padding:0;color:var(--brand);font:inherit;cursor:pointer}button.inline:hover{text-decoration:underline}.top{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:10px;padding:10px 20px;background:var(--panel);border-bottom:1px solid var(--line)}.brand{font-weight:700;color:var(--ink);white-space:nowrap}.brand:hover{text-decoration:none}.mark{color:var(--brand);margin-right:6px}.burger{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:4px 10px;font-size:18px;color:var(--ink);cursor:pointer}.search{width:280px;max-width:30vw;padding:7px 12px;border:1px solid var(--line);border-radius:9px;background:var(--bg);color:var(--ink);font:inherit;font-size:14px}.langsw{display:inline-flex;border:1px solid var(--line);border-radius:9px;overflow:hidden}.langsw button{padding:7px 12px;border:0;background:var(--panel);color:var(--ink);font:inherit;font-size:13px;cursor:pointer}.langsw button.on{background:var(--brand);color:#fff}.body{display:flex;max-width:1280px;margin:0 auto}.side{width:270px;flex:none;position:sticky;top:57px;align-self:flex-start;height:calc(100vh - 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