/* The instrument look the rest of Strata uses: near-black, one ember accent,
   mono for anything the database said. The canvas is the only bright thing. */
:root {
  --void: #050607;
  --panel: #0e0f10;
  --raised: #16181a;
  --line: rgba(255, 255, 255, 0.09);
  --line-hover: rgba(255, 255, 255, 0.18);
  --ink-hi: #f2f4f7;
  --ink-mid: #9a9ca3;
  --ink-low: #6b7078;
  --ember: #ff7a52;
  --ember-dim: rgba(255, 122, 82, 0.22);
  --mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --radius: 12px;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--void);
  color: var(--ink-hi);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.app {
  display: grid;
  grid-template-rows: auto 1fr auto auto auto;
  gap: 0.75rem;
  height: 100%;
  max-width: 68rem;
  margin: 0 auto;
  padding: 1rem 1rem 1.15rem;
}

/* ---- header ---- */
.bar {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 0.9rem;
  margin: 0;
}

.wordmark {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.claim {
  flex: 1 1 18rem;
  margin: 0;
  color: var(--ink-mid);
  font-size: 0.83rem;
}

.counts {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-low);
  white-space: nowrap;
}

/* One chip per timeline. They appear the moment there is more than one, so
   an app nobody has forked never mentions branches at all. */
.branches {
  display: flex;
  gap: 0.35rem;
}

.branch {
  padding: 0.22rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--raised);
  color: var(--ink-mid);
  font-family: var(--mono);
  font-size: 0.68rem;
  cursor: pointer;
}

.branch:hover {
  border-color: var(--line-hover);
  color: var(--ink-hi);
}

.branch[aria-current='true'] {
  border-color: var(--ember);
  background: rgba(255, 122, 82, 0.12);
  color: var(--ember);
}

/* ---- the canvas ---- */
.stage {
  position: relative;
  min-height: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
}

.board {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none; /* the pointer is a brush here, not a scroller */
  cursor: crosshair;
}

/* `display: flex` beats the UA's `[hidden] { display: none }`, so the flag
   announced "reading the past" over a canvas showing the present. */
.past-flag[hidden] {
  display: none;
}

.past-flag {
  position: absolute;
  top: 0.7rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0;
  padding: 0.35rem 0.4rem 0.35rem 0.75rem;
  border: 1px solid var(--ember-dim);
  border-radius: 999px;
  background: rgba(14, 15, 16, 0.86);
  backdrop-filter: blur(8px);
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--ember);
}

.ghost {
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--line-hover);
  border-radius: 999px;
  background: none;
  color: var(--ink-hi);
  font: inherit;
  font-size: 0.68rem;
  cursor: pointer;
}

.ghost:hover {
  border-color: var(--ember);
  color: var(--ember);
}

.boot {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  margin: 0;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink-low);
}

.boot[data-failed] {
  color: var(--ember);
  padding: 2rem;
  text-align: center;
}

/* ---- tools ---- */
.tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.swatches {
  display: flex;
  gap: 0.4rem;
}

.swatch {
  width: 1.6rem;
  height: 1.6rem;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--swatch);
  cursor: pointer;
  transition:
    transform 140ms ease,
    box-shadow 140ms ease;
}

.swatch:hover {
  transform: scale(1.12);
}

.swatch[aria-checked='true'] {
  box-shadow:
    0 0 0 2px var(--void),
    0 0 0 4px var(--swatch);
}

.size {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.size input {
  width: 8rem;
  accent-color: var(--ember);
}

.size-dot {
  display: block;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: var(--ink-mid);
  transform: scale(var(--dot, 0.4));
  transition: transform 120ms ease;
}

.tool {
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--raised);
  color: var(--ink-mid);
  font: inherit;
  font-size: 0.78rem;
  cursor: pointer;
}

.tool:hover {
  border-color: var(--line-hover);
  color: var(--ink-hi);
}

.tool[aria-pressed='true'] {
  border-color: var(--ember);
  color: var(--ember);
}

/* ---- the timeline ---- */
.timeline {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.play {
  flex: none;
  display: grid;
  place-content: center;
  width: 2.1rem;
  height: 2.1rem;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--raised);
  color: var(--ink-hi);
  cursor: pointer;
}

.play:hover:not(:disabled) {
  border-color: var(--ember);
  color: var(--ember);
}

.play:disabled {
  opacity: 0.35;
  cursor: default;
}

.play svg {
  width: 0.85rem;
  height: 0.85rem;
  fill: currentColor;
}

.track {
  position: relative;
  flex: 1 1 auto;
  height: 2.1rem;
}

.track-line,
.track-fill {
  position: absolute;
  top: 50%;
  left: 0;
  height: 2px;
  margin-top: -1px;
  border-radius: 2px;
  pointer-events: none;
}

.track-line {
  right: 0;
  background: var(--line);
}

.track-fill {
  width: 0;
  background: var(--ember);
}

/* One mark per commit. At a few hundred strokes they merge into a bar, which
   is the honest picture of a long session rather than a lie about spacing. */
.ticks {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.ticks i {
  position: absolute;
  top: 50%;
  width: 2px;
  height: 9px;
  margin-top: -4.5px;
  border-radius: 1px;
  background: var(--ink-low);
}

/* Past the playhead the track is ember, and a grey mark on it reads as dirt.
   The commits already drawn get a dark mark instead, which is the same
   information the other way up. */
.track-fill ~ .ticks i {
  mix-blend-mode: normal;
}

.track input {
  position: absolute;
  inset: 0;
  width: 100%;
  margin: 0;
  background: none;
  accent-color: var(--ember);
  cursor: pointer;
}

.at {
  flex: none;
  min-width: 7.5rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-mid);
  text-align: right;
}

/* ---- what the database was just asked ---- */
.call {
  margin: 0;
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--ink-low);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.call b {
  color: var(--ember);
  font-weight: 400;
}

@media (max-width: 640px) {
  .app {
    gap: 0.6rem;
    padding: 0.75rem 0.7rem 0.9rem;
  }

  .claim {
    display: none;
  }

  .size input {
    width: 5rem;
  }

  .at {
    min-width: 5.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .swatch,
  .size-dot {
    transition: none;
  }
}