:root{color-scheme:dark;--bg:#09111e;--panel:#111e2d;--panel2:#142438;--line:#25364a;--text:#e8f0f7;--muted:#8da2b5;--accent:#61ddcb;--blue:#6d9bff}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.6 system-ui,-apple-system,"Noto Sans JP",sans-serif}button,input,textarea,select{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.layout{display:flex;min-height:100vh}.sidebar{width:258px;flex-shrink:0;border-right:1px solid var(--line);padding:30px 18px;display:flex;flex-direction:column;background:#0c1623}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--text);font-weight:850;font-size:24px;letter-spacing:1px;padding:4px 12px 42px}.brandmark{display:grid;place-items:center;background:#153f46;color:var(--accent);width:42px;height:42px;border-radius:12px}.brand 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