:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1f2328;
  --rule: #e5e7eb;
  --muted: #6b7280;
  --add: rgba(46, 160, 67, 0.15);
  --remove: rgba(248, 81, 73, 0.18);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --fg: #e6edf3;
    --rule: #30363d;
    --muted: #9ca3af;
    --add: rgba(46, 160, 67, 0.4);
    --remove: rgba(248, 81, 73, 0.4);
  }
}

body {
  margin: 0;
  font: 14px/1.5 system-ui, sans-serif;
  color: var(--fg);
  background: var(--bg);
  display: grid;
  grid-template-rows: 1fr auto;
  height: 100vh;
}

#timeline {
  display: flex;
  overflow-x: auto;
  min-height: 0;
  scroll-snap-type: x mandatory;
}

#minimap {
  display: flex;
  gap: 2px;
  padding: 0.5rem 1rem;
  border-top: 1px solid var(--rule);
  background: var(--bg);
}

#minimap button {
  flex: 1;
  min-width: 4px;
  height: 14px;
  padding: 0;
  border: none;
  border-radius: 2px;
  background: var(--muted);
  opacity: 0.35;
  cursor: pointer;
  transition: opacity 0.12s, background 0.12s;
}

#minimap button:hover { opacity: 0.7; }
#minimap button[aria-current] { opacity: 1; background: var(--fg); }
/* Pip for the commit whose blame matches the line being hovered. */
#minimap button.hint {
  opacity: 1;
  background: var(--fg);
  transform: scaleY(1.5);
}

article {
  flex: 0 0 min(820px, 92vw);
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--rule);
  overflow: hidden;
}

/* Newest column sits at the right end of the timeline; snapping its end (rather than start) to
   the viewport's end keeps it visible on initial load and on right-edge scrolls, without needing
   a phantom trailing spacer that would balloon on wide screens. */
article:last-child { scroll-snap-align: end; }

article > header {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--rule);
  background: var(--bg);
  display: grid;
  grid-template-columns: auto auto 1fr;
  column-gap: 0.75rem;
  align-items: baseline;
}

header a {
  font-family: ui-monospace, monospace;
  color: var(--fg);
}

header time { color: var(--muted); }
header address { font-style: normal; color: var(--muted); }

header p {
  grid-column: 1 / -1;
  margin: 0.25rem 0 0;
  font-weight: 600;
}

pre {
  margin: 0;
  padding: 1rem;
  font: 13px/1.55 ui-monospace, monospace;
  /* Wrap long lines; vertical-scroll only. Pairs with the cross-column scroll sync in main.js. */
  white-space: pre-wrap;
  overflow-y: auto;
  overflow-x: hidden;
  flex: 1;
}

/* Shiki emits both themes as CSS variables when defaultColor is false; we pick one per scheme.
   Background goes on the outer <pre> only — putting it on every span would paint over the
   per-line diff tints, since token spans nest inside `.line` spans. */
.shiki {
  background-color: var(--shiki-light-bg);
  color: var(--shiki-light);
}
.shiki span { color: var(--shiki-light); }

@media (prefers-color-scheme: dark) {
  .shiki {
    background-color: var(--shiki-dark-bg);
    color: var(--shiki-dark);
  }
  .shiki span { color: var(--shiki-dark); }
}

.line[data-diff="add"]    { background: var(--add); }
.line[data-diff="remove"] { background: var(--remove); }

/* Every line carries a blame; clicking jumps to the commit that introduced it. */
.line[data-blame] { cursor: pointer; }
.line[data-blame]:hover {
  background: color-mix(in srgb, var(--fg) 10%, transparent);
  box-shadow: inset 2px 0 0 var(--fg);
}

#tooltip {
  position: fixed;
  z-index: 10;
  max-width: 360px;
  padding: 0.5rem 0.75rem;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--rule);
  border-radius: 6px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.18);
  font: 13px/1.4 system-ui, sans-serif;
  pointer-events: none;
}

#tooltip strong { display: block; margin-bottom: 0.15rem; }
#tooltip small { color: var(--muted); }
#tooltip code { font-family: ui-monospace, monospace; }

#timeline:has(> form) {
  display: grid;
  place-items: center;
}

form {
  display: grid;
  gap: 0.75rem;
  width: min(560px, 90vw);
}

form label { display: grid; gap: 0.25rem; }
form input, form button { font: inherit; padding: 0.5rem 0.75rem; }
form button { cursor: pointer; justify-self: start; }