:root{color-scheme:dark;--bg:#0a0e14;--surface:#121820;--border:#2a3544;--text:#e8edf4;--muted:#8b9aab;--accent:#3d8bfd;--sidebar:#0d1218}*{box-sizing:border-box}html:focus-within{scroll-behavior:smooth}body{margin:0;font-family:Pretendard Variable,Pretendard,system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.lang-switch{display:inline-flex;gap:2px;border:1px solid var(--border);border-radius:999px;padding:2px}.lang-switch button{border:none;background:transparent;color:var(--muted);font:inherit;font-size:12px;font-weight:600;padding:4px 8px;border-radius:999px;cursor:pointer}.lang-switch button.is-on,.skip-link{background:var(--accent);color:#fff}.skip-link{position:absolute;left:12px;top:-48px;z-index:50;padding:8px 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