:root {
  color-scheme: dark;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--canvas);
  color: var(--text);
  --canvas: #0d1117;
  --header: #161b22;
  --surface: #0d1117;
  --subtle: #161b22;
  --button: #21262d;
  --button-hover: #30363d;
  --border: #30363d;
  --border-muted: #21262d;
  --text: #e6edf3;
  --muted: #8b949e;
  --green: #3fb950;
  --yellow: #d29922;
  --red: #f85149;
  --blue: #58a6ff;
  --accent: #f78166;
  --counter: #6e768166;
  --hunk-bg: #14243a;
  --addition-bg: #0d2a17;
  --addition-mark: #1f6f35;
  --deletion-bg: #381318;
  --deletion-mark: #9e3039;
  --line-border: #f0f6fc14;
}

:root[data-theme="light"] {
  color-scheme: light;
  --canvas: #ffffff;
  --header: #f6f8fa;
  --surface: #ffffff;
  --subtle: #f6f8fa;
  --button: #f6f8fa;
  --button-hover: #eef1f4;
  --border: #d0d7de;
  --border-muted: #d8dee4;
  --text: #1f2328;
  --muted: #656d76;
  --green: #1a7f37;
  --yellow: #9a6700;
  --red: #cf222e;
  --blue: #0969da;
  --accent: #fd8c73;
  --counter: #afb8c133;
  --hunk-bg: #ddf4ff;
  --addition-bg: #e6ffec;
  --addition-mark: #abf2bc;
  --deletion-bg: #ffebe9;
  --deletion-mark: #ffc1ba;
  --line-border: #d0d7de88;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background: var(--canvas);
  color: var(--text);
}

button, select { font: inherit; }

.shell {
  width: min(1240px, calc(100vw - 32px));
  margin: 0 auto;
}

.siteHeader {
  border-bottom: 1px solid var(--border);
  background: var(--header);
}

.headerInner {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 0 24px;
}

.eyebrow {
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
}

h1, h2, p { margin: 0; }
h1 { font-size: 28px; line-height: 1.25; }
h2 { font-size: 20px; }

.siteHeader p, .historyHeading p {
  margin-top: 6px;
  color: var(--muted);
}

.themePicker {
  display: grid;
  gap: 5px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

select, .tab, .historyButton {
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--button);
  color: var(--text);
}

select {
  height: 34px;
  min-width: 180px;
  padding: 0 30px 0 10px;
}

.snapshotHeader {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  padding: 28px 0 20px;
}

.snapshotMeta {
  margin-top: 7px;
  color: var(--muted);
  font-size: 13px;
}

.historyButton {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  padding: 5px 12px;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}

.historyButton:hover, select:hover { background: var(--button-hover); }

.overview {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.stat {
  padding: 14px 16px;
  border-right: 1px solid var(--border-muted);
}

.stat:last-child { border-right: 0; }
.stat strong { display: block; font-size: 20px; }
.stat span { display: block; margin-top: 2px; color: var(--muted); font-size: 12px; }
.stat.additions strong { color: var(--green); }
.stat.modifications strong { color: var(--yellow); }
.stat.deletions strong { color: var(--red); }

.tabs {
  display: flex;
  gap: 8px;
  margin-top: 24px;
  border-bottom: 1px solid var(--border);
}

.tab {
  margin-bottom: -1px;
  padding: 10px 14px;
  border-color: transparent;
  background: transparent;
  cursor: pointer;
}

.tab.active {
  border-bottom: 2px solid var(--accent);
  border-radius: 0;
  font-weight: 600;
}

.counter {
  margin-left: 4px;
  padding: 1px 6px;
  border-radius: 20px;
  background: var(--counter);
  font-size: 12px;
}

.changeSummary {
  display: flex;
  gap: 18px;
  padding: 16px 0;
  color: var(--muted);
  font-size: 13px;
}

.changeSummary strong { color: var(--text); }
.changeSummary .added { color: var(--green); }
.changeSummary .modified { color: var(--yellow); }
.changeSummary .removed { color: var(--red); }

.diffPanel {
  overflow: hidden;
  margin-bottom: 36px;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.diffHeading, .diffCapture > header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--subtle);
  font-size: 13px;
}

.diffHeading strong, .diffHeading span { display: block; }
.diffHeading span { margin-top: 2px; color: var(--muted); font-size: 12px; }
.lineStats { display: flex; gap: 8px; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; }
.addedStat { color: var(--green); }
.removedStat { color: var(--red); }

.diffTimeline {
  display: grid;
  gap: 16px;
  padding: 16px;
}

.diffCapture {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.diffCapture > header { color: var(--muted); }
.diffCapture > header strong { color: var(--text); }
.diffHunk + .diffHunk { border-top: 1px solid var(--border-muted); }

.fileIdentity,
.fileStats {
  display: flex;
  align-items: center;
  gap: 10px;
}

.fileStats {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
}

.hunkHeader {
  padding: 8px 12px;
  background: var(--hunk-bg);
  color: var(--blue);
  font: 12px ui-monospace, SFMono-Regular, Consolas, monospace;
}

.diffRows { overflow-x: auto; }

.diffRow {
  display: grid;
  grid-template-columns: 54px 54px 24px minmax(max-content, 1fr);
  min-height: 22px;
  font: 12px/22px ui-monospace, SFMono-Regular, Consolas, monospace;
}

.diffRow.added { background: var(--addition-bg); }
.diffRow.removed { background: var(--deletion-bg); }
.diffRow.meta { color: var(--muted); }

.lineNumber {
  padding: 0 8px;
  border-right: 1px solid var(--line-border);
  color: var(--muted);
  text-align: right;
  user-select: none;
}

.lineMarker { color: var(--muted); text-align: center; user-select: none; }
.diffRow code { padding: 0 10px 0 2px; color: var(--text); white-space: pre; }
.diffRow.added mark { background: var(--addition-mark); color: inherit; }
.diffRow.removed mark { background: var(--deletion-mark); color: inherit; }

.emptyDiff, .legacyNotice {
  padding: 36px 18px;
  color: var(--muted);
  text-align: center;
}

.historyView { padding: 24px 0 44px; }
.historyHeading { margin-bottom: 16px; }

.history {
  display: grid;
  gap: 18px;
}

.commitDay {
  position: relative;
  padding-left: 40px;
}

.commitDay::before {
  position: absolute;
  top: 16px;
  bottom: -18px;
  left: 16px;
  width: 2px;
  background: var(--border);
  content: "";
}

.commitDay:last-child::before {
  bottom: 24px;
}

.commitDate {
  position: relative;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 13px;
}

.commitDate > span {
  position: absolute;
  top: 6px;
  left: -30px;
  width: 10px;
  height: 10px;
  border: 2px solid var(--muted);
  border-radius: 50%;
  background: var(--canvas);
}

.commitList {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.historyItem {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border-top: 1px solid var(--border-muted);
  background: var(--surface);
  cursor: pointer;
}

.historyItem:first-child { border-top: 0; }
.historyItem.selected { border-left: 3px solid var(--blue); background: var(--subtle); }
.historyItem:hover { background: var(--subtle); }
.historyItem:focus-visible { outline: 2px solid var(--blue); outline-offset: -2px; }
.historyTitle { font-weight: 600; }
.historyMeta { margin-top: 4px; color: var(--muted); font-size: 12px; }
.commitHash {
  display: flex;
  align-items: center;
  gap: 14px;
  font: 600 12px ui-monospace, SFMono-Regular, Consolas, monospace;
}

.commitHash span {
  color: var(--muted);
  font: 700 15px -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.muted { color: var(--muted); }

@media (max-width: 820px) {
  .headerInner, .snapshotHeader, .historyItem {
    align-items: stretch;
    flex-direction: column;
  }

  select { width: 100%; }
  .commitDay { padding-left: 28px; }
  .commitDay::before { left: 8px; }
  .commitDate > span { left: -24px; }
  .overview { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2n) { border-right: 0; }
  .stat { border-bottom: 1px solid var(--border-muted); }
  .stat:nth-last-child(-n + 2) { border-bottom: 0; }
  .changeSummary { flex-wrap: wrap; }
  .diffRow { grid-template-columns: 42px 42px 20px minmax(max-content, 1fr); }
}