:root {
  --bg: #f6f7f9; --panel: #fff; --ink: #1d2330; --muted: #6b7385; --line: #e3e6ec;
  --accent: #3563e9; --accent-ink: #fff; --soft: #eef2fd;
  --ok: #1f8a4c; --warn: #b26b00; --old: #8a8f9c; --add: #e7f6ec; --del: #fdecec;
  --radius: 10px;
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1218; --panel: #171b23; --ink: #e5e8ef; --muted: #8b93a5; --line: #262c38;
    --accent: #6f93ff; --soft: #1d2433; --ok: #4cc27f; --warn: #e2a33b; --old: #7d8494; --add: #15301f; --del: #3a1a1c; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font: 13px ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; background: var(--soft); padding: 1px 5px; border-radius: 4px; }
.muted { color: var(--muted); font-size: 13px; }
.center { text-align: center; }

.top { position: sticky; top: 0; z-index: 5; display: flex; gap: 14px; align-items: center; padding: 10px 20px;
  background: color-mix(in srgb, var(--panel) 92%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: baseline; gap: 8px; }
.logo { font-size: 19px; font-weight: 600; color: var(--ink); letter-spacing: .3px; }
.logo b { color: var(--accent); }
.sub { color: var(--muted); font-size: 13px; }
.head-info { flex: 1; min-width: 0; color: var(--muted); font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; text-align: right; }
.head-info b { color: var(--ink); font-weight: 500; }

.tabs { display: flex; gap: 4px; padding: 10px 20px 0; max-width: 980px; margin: 0 auto; overflow-x: auto; }
.tabs a { padding: 7px 14px; border-radius: 999px; color: var(--muted); white-space: nowrap; }
.tabs a.on { background: var(--ink); color: var(--panel); }
.tabs a:hover { text-decoration: none; }
.tabs i { font-style: normal; font-size: 12px; margin-left: 2px; opacity: .8; }

main { max-width: 980px; margin: 0 auto; padding: 14px 20px 80px; }
.btn { border: 0; background: var(--accent); color: var(--accent-ink); padding: 7px 14px; border-radius: 8px; font: inherit; font-size: 14px; cursor: pointer; }
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn:disabled { opacity: .5; cursor: default; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.row.end { justify-content: flex-end; margin-top: 8px; }

.day h2, .group h2 { font-size: 13px; color: var(--muted); font-weight: 500; margin: 18px 0 8px; letter-spacing: .5px; }
.commit, .card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; margin-bottom: 8px; }
.c-head { display: flex; gap: 10px; align-items: baseline; }
.time { font: 13px ui-monospace, monospace; color: var(--muted); }
.c-msg { flex: 1; color: var(--ink); font-weight: 500; }
.who { color: var(--muted); font-size: 12px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.chip { font-size: 12px; padding: 2px 9px; border-radius: 999px; background: var(--soft); color: var(--ink); }
.chip small { color: var(--muted); margin-left: 6px; }
.chip.added { box-shadow: inset 0 0 0 1px var(--ok); }
.chip.removed { text-decoration: line-through; opacity: .7; }
.chip.on { background: var(--accent); color: var(--accent-ink); }
.chip:hover { text-decoration: none; }

.card-h { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; margin-bottom: 6px; }
.card-h small { color: var(--muted); }
details.card > summary { cursor: pointer; list-style: none; }
.crumb { margin: 6px 0; font-size: 14px; }
.title { font-size: 20px; margin: 4px 0; word-break: break-all; }
.fhead { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; }
pre.msg { white-space: pre-wrap; background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 10px; font-size: 13px; }

pre.diff { margin: 0; overflow-x: auto; font: 12.5px/1.55 ui-monospace, Menlo, Consolas, monospace; white-space: pre-wrap; word-break: break-word; }
pre.diff span { display: block; padding: 0 6px; }
pre.diff .add { background: var(--add); }
pre.diff .del { background: var(--del); }
pre.diff .hunk { color: var(--muted); background: var(--soft); }

.search input, .sum, textarea { width: 100%; font: inherit; color: var(--ink); background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 9px 12px; }
.sum { flex: 1; min-width: 200px; width: auto; }
.search { margin: 4px 0 6px; }
.frow { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 12px; padding: 8px 12px; background: var(--panel); border: 1px solid var(--line); border-radius: 8px; margin-bottom: 4px; }
.fname { word-break: break-all; }
.meta { color: var(--muted); font-size: 12.5px; display: flex; gap: 8px; align-items: center; }
.stale { color: var(--warn); }
.lock { border: 1px solid var(--line); border-radius: 4px; padding: 0 5px; font-size: 11px; }
.snip { flex-basis: 100%; font-size: 12.5px; color: var(--muted); }

.att { display: flex; gap: 10px; padding: 5px 0; border-top: 1px dashed var(--line); color: var(--ink); font-size: 14px; }
.att small { color: var(--muted); min-width: 32px; font-family: ui-monospace, monospace; }
.att:hover { text-decoration: none; background: var(--soft); }

.inbox { list-style: none; margin: 0; padding: 0; }
.inbox li { display: flex; gap: 8px; padding: 6px 0; border-top: 1px dashed var(--line); font-size: 14px; }
.inbox li.done { color: var(--muted); }
.box { flex: none; width: 16px; height: 16px; margin-top: 4px; border: 1.5px solid var(--muted); border-radius: 4px; font-size: 11px; line-height: 13px; text-align: center; }
.box.on { background: var(--ok); border-color: var(--ok); color: #fff; }
.warnbox { background: color-mix(in srgb, var(--warn) 12%, var(--panel)); border: 1px solid color-mix(in srgb, var(--warn) 40%, transparent); padding: 10px 12px; border-radius: 8px; font-size: 14px; }
.hist { margin: 8px 0; font-size: 13px; color: var(--muted); }
.hist ul { margin: 6px 0; padding-left: 18px; }
.hist summary { cursor: pointer; }

.md { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 22px 18px; }
.md h1 { font-size: 22px; } .md h2 { font-size: 18px; border-bottom: 1px solid var(--line); padding-bottom: 4px; } .md h3 { font-size: 16px; }
.md h1, .md h2, .md h3, .md h4 { margin: 20px 0 8px; }
.md ul, .md ol { padding-left: 22px; margin: 6px 0; }
.md li.task { list-style: none; margin-left: -18px; display: block; }
.md li.task > .box { display: inline-block; margin-right: 6px; vertical-align: -2px; }
.md blockquote { margin: 8px 0; padding: 4px 12px; border-left: 3px solid var(--line); color: var(--muted); }
.md pre { background: var(--soft); padding: 10px; border-radius: 8px; overflow-x: auto; }
.md pre code { background: none; padding: 0; }
.md .tbl { overflow-x: auto; margin: 8px 0; }
.md table { border-collapse: collapse; font-size: 14px; }
.md th, .md td { border: 1px solid var(--line); padding: 5px 9px; text-align: left; vertical-align: top; }
.md th { background: var(--soft); }
.md .extra { color: var(--muted); font-size: 13.5px; }
.blk { position: relative; border-radius: 6px; }
.blk:hover, .blk.sel { background: var(--soft); }
.blk.hit { background: color-mix(in srgb, var(--warn) 18%, transparent); }
.blk-ask { display: none; position: absolute; right: 4px; top: 2px; font-size: 11.5px; padding: 1px 8px; border-radius: 999px;
  border: 1px solid var(--accent); background: var(--panel); color: var(--accent); cursor: pointer; z-index: 2; }
.blk:hover > .blk-ask, .blk.sel > .blk-ask { display: inline-block; }
tr.blk > .blk-ask { top: 4px; }
mark { background: none; font-weight: 600; padding: 0 2px; border-radius: 3px; }
mark.t-ok { color: var(--ok); } mark.t-warn { color: var(--warn); background: color-mix(in srgb, var(--warn) 12%, transparent); }
mark.t-old { color: var(--old); text-decoration: line-through; }
.src { font-size: 11px; color: var(--muted); border: 1px solid var(--line); border-radius: 4px; padding: 0 4px; }

.editor { min-height: 60vh; font: 13.5px/1.6 ui-monospace, Menlo, Consolas, monospace; margin: 8px 0; resize: vertical; }

dialog { border: 1px solid var(--line); border-radius: 12px; background: var(--panel); color: var(--ink); width: min(520px, 92vw); padding: 16px 18px; }
dialog::backdrop { background: rgba(0, 0, 0, .35); }
dialog h3 { margin: 0 0 4px; }
dialog blockquote { margin: 8px 0; padding: 4px 10px; border-left: 3px solid var(--line); color: var(--muted); font-size: 13px; max-height: 120px; overflow: auto; }
#toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%) translateY(20px); opacity: 0; transition: .2s;
  background: var(--ink); color: var(--panel); padding: 9px 16px; border-radius: 8px; font-size: 14px; pointer-events: none; max-width: 90vw; z-index: 20; }
#toast.show { opacity: 1; transform: translateX(-50%); }
#toast.bad { background: #c0392b; color: #fff; }

@media (max-width: 640px) {
  .top { padding: 8px 14px; flex-wrap: wrap; }
  .head-info { order: 3; flex-basis: 100%; text-align: left; }
  .sub { display: none; }
  .tabs, main { padding-left: 12px; padding-right: 12px; }
  .md { padding: 6px 14px 14px; }
  .c-head { flex-wrap: wrap; }
}