:root {
  --bg: #f4f5f7; --fg: #1d2129; --muted: #667085; --card: #fff;
  --line: #d9dde3; --accent: #2457c5; --danger: #c22a2a;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #15171c; --fg: #e6e8ec; --muted: #9aa3b2; --card: #1f2229; --line: #343944; --accent: #7aa2ff; --danger: #ff7b7b; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 16px; }
main.narrow { max-width: 380px; padding-top: 12vh; }
h1 { font-size: 1.6rem; margin: 0 0 12px; }
h2 { font-size: 1.1rem; margin: 20px 0 10px; }
a { color: var(--accent); }
.muted { color: var(--muted); font-size: .9rem; margin: 0; }
.bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 16px; background: var(--card); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 2; }
.bar form { margin: 0; }
.ellipsis { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px; margin-bottom: 12px; }
.card h2 { margin-top: 0; }
.stack { display: flex; flex-direction: column; gap: 12px; }
.row { display: flex; gap: 8px; margin: 8px 0; }
label { display: flex; flex-direction: column; gap: 4px; font-size: .9rem; }
input { font: inherit; padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--fg); min-width: 0; }
input[type=file] { padding: 6px; }
button, .btn { font: inherit; padding: 8px 14px; border: 0; border-radius: 6px; background: var(--accent); color: #fff; cursor: pointer; text-decoration: none; white-space: nowrap; }
@media (prefers-color-scheme: dark) { button, .btn { color: #111; } }
button.link { background: none; color: var(--accent); padding: 0; }
button.danger { background: var(--danger); }
.flash { max-width: 760px; margin: 12px auto 0; padding: 0 16px; }
.flash p { margin: 0 0 6px; padding: 10px 14px; border-radius: 6px; background: var(--card); border: 1px solid var(--line); }
.doc { display: flex; flex-direction: column; gap: 8px; }
.doc-title { font-weight: 600; font-size: 1.05rem; word-break: break-word; }
.share { display: flex; gap: 8px; margin-top: 8px; }
.share input { flex: 1; font-size: .85rem; }
details summary { cursor: pointer; color: var(--muted); font-size: .9rem; }
body.viewer { background: #8a8f98; }
#doc { padding: 16px 0; overflow-x: auto; }
#doc .docx-wrapper { background: transparent; padding: 0; }
#doc .docx-wrapper > section.docx { margin: 0 auto 16px; box-shadow: 0 2px 10px rgba(0,0,0,.3); }
.status { text-align: center; color: #fff; padding: 40px 16px; }