:root{--bg:#f6f8fa;--card:#fff;--ink:#1f2328;--muted:#656d76;--border:#d0d7de;--accent:#6b4eff;--chip:#eaeef2}@media(prefers-color-scheme:dark){:root{--bg:#0d1117;--card:#161b22;--ink:#e6edf3;--muted:#8b949e;--border:#30363d;--accent:#8c7bff;--chip:#21262d}}*{box-sizing:border-box}body,html{margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--ink);line-height:1.5}.wrap{max-width:980px;margin:0 auto;padding:0 1.25rem}.topbar{border-bottom:1px solid var(--border);background:var(--card);position:sticky;top:0;z-index:10}.topbar-inner{display:flex;align-items:baseline;gap:1rem;padding-top:.9rem;padding-bottom:.9rem}.brand{display:inline-flex;align-items:center;gap:.5rem;text-decoration:none;color:var(--ink);font-weight:700;font-size:1.2rem;letter-spacing:-.01em}.brand-mark{color:var(--accent)}.tagline{margin:0;color:var(--muted);font-size:.85rem}.nav-area{margin-left:auto;display:flex;align-items:center;gap:.9rem}.nav-link{text-decoration:none;color:var(--muted);font-size:.9rem;font-weight:600}.nav-link:hover{color:var(--accent)}.nav-user{font-size:.85rem}.signout{border:none;background:none;cursor:pointer;font:inherit;font-weight:600;color:var(--muted);padding:0}.main{padding-top:1.75rem;padding-bottom:4rem}a{color:var(--accent)}select{-moz-appearance:none;appearance:none;-webkit-appearance:none;font:inherit;color:var(--ink);background-color:var(--card);border:1px solid var(--border);border-radius:9px;padding:.5rem 2rem .5rem .75rem;cursor:pointer;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='none' stroke='%23888' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M2.5 4.5 6 8l3.5-3.5'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right .7rem center;background-size:.7rem}select:hover{border-color:var(--accent)}select:focus-visible{outline:2px solid var(--accent);outline-offset:1px}