:root{--fg:#1f2328;--muted:#59636e;--bg:#fff;--panel:#f6f8fa;--border:#d1d9e0;--accent:#0969da;--ok-bg:#dafbe1;--warn-bg:#fff8c5;--error-bg:#ffebe9;color:var(--fg);background:var(--bg);font-family:system-ui,-apple-system,Segoe UI,sans-serif;line-height:1.5}*{box-sizing:border-box}body{background:var(--bg);margin:0}button{font:inherit;border:1px solid var(--border);background:var(--panel);color:inherit;cursor:pointer;border-radius:6px;padding:.35rem .8rem}button:disabled{cursor:default;opacity:.55}button.primary{background:var(--accent);border-color:var(--accent);color:#fff}input,textarea{font:inherit;border:1px solid var(--border);border-radius:6px;width:100%;padding:.35rem .5rem}textarea{font-family:ui-monospace,monospace;font-size:.85rem}.muted{color:var(--muted)}.page,.card{max-width:44rem;margin:2rem auto;padding:0 1rem}.banner{border:1px solid var(--border);background:var(--panel);border-radius:6px;margin:0 0 .75rem;padding:.6rem .8rem}.banner p{margin-top:0}.banner-ok{background:var(--ok-bg)}.banner-warn{background:var(--warn-bg)}.banner-error{background:var(--error-bg)}.actions{gap:.5rem;margin-top:.5rem;display:flex}.unsaved-copy{margin-top:.5rem;font-weight:600;display:block}.top-bar{border-bottom:1px solid var(--border);background:var(--panel);flex-wrap:wrap;align-items:center;gap:.5rem 1rem;padding:.5rem 1rem;display:flex}.repo-name{overflow-wrap:anywhere}.sign-out{margin-left:auto}.repo-list{padding:0;list-style:none}.repo-list button{text-align:left;width:100%;margin-bottom:.5rem}.workspace{grid-template-columns:minmax(12rem,18rem) 1fr;min-height:calc(100vh - 3rem);display:grid}.workspace aside{border-right:1px solid var(--border);padding:.75rem;overflow:auto}.editor-pane{flex-direction:column;min-width:0;padding:.75rem;display:flex}.file-tree ul{margin:0;padding-left:.9rem;list-style:none}.file-tree>ul{padding-left:0}.file-tree summary{cursor:pointer}.file-tree .file{text-align:left;overflow-wrap:anywhere;background:0 0;border:none;padding:.1rem .25rem}.file-tree .file-document{font-weight:600}.file-tree .file[aria-current=true]{background:var(--ok-bg)}.edited{color:var(--accent);font-weight:400}.save-bar{align-items:flex-end;gap:.5rem;margin-bottom:.75rem;display:flex}.save-bar label{flex:1}.editor{border:1px solid var(--border);border-radius:6px;flex:1;min-height:20rem;display:flex;overflow:hidden}@media (width<=40rem){.workspace{grid-template-columns:1fr}.workspace aside{border-right:none;border-bottom:1px solid var(--border);max-height:35vh}}