/* Timeline pure CSS styling following pattern/Button.css architecture
   - Local CSS variables (--r-timeline-*) declared on the list; items inherit them
   - Modifier classes rebind local variables
   - Component styles strictly consume local variables
   - Every marker is a status pixel: a 9px square in the item's colour with a
     1.5px sticker-ink edge, strung on a hairline. Titles are 14/20 ink,
     details and times Space Mono 12 in ink-3, the time on the right of the
     row. One scale for every size; `lg` only opens the title to 16/24.
*/

/* ─────────────────────────────────────────────────────────────────────────
   1. Local Variable Definitions & Modifier Overrides
   ───────────────────────────────────────────────────────────────────────── */

.r-timeline {
  --r-timeline-icon-size: var(--r-timeline-custom-icon-size, 9px);
  --r-timeline-title-font-size: 14px;
  --r-timeline-content-font-size: 12px;
  --r-timeline-time-font-size: 12px;
  --r-timeline-line-height: 20px;
  --r-timeline-item-inner-gap: 2px;
  --r-timeline-title-font-family: var(--font-sans);
  --r-timeline-title-font-weight: 400;
  --r-timeline-gap: 12px;
  --r-timeline-item-gap: 12px;
  --r-timeline-horizontal-item-gap: 40px;
  --r-timeline-line-width: 1px;
  --r-timeline-line-color: var(--line-muted);
  --r-timeline-marker-border-width: 1.5px;
  --r-timeline-marker-radius: 2px;
  /* How much of the variant's fill the marker takes, and its outline. */
  --r-timeline-marker-fill: 100%;
  --r-timeline-marker-border-color: var(--sticker-ink);
  /* How far each marker sits below the item's top, to center on the title's first line. */
  --r-timeline-axis-offset: calc((20px - var(--r-timeline-icon-size)) / 2);

  &.r-timeline--lg {
    --r-timeline-title-font-size: 16px;
    --r-timeline-line-height: 24px;
    --r-timeline-axis-offset: calc((24px - var(--r-timeline-icon-size)) / 2);
  }

  &.r-timeline--horizontal {
    --r-timeline-axis-offset: 0px;
  }
}

/* Markers take the presence colours (default = offline stone, accent = the
   In Review lavender, since pink only means "do it"); task-status items keep
   their status colour. */
.r-timeline-item {
  --r-timeline-item-color: var(--foreground-hint);
  --r-timeline-item-fill: var(--presence-offline);

  &.r-timeline-item--information {
    --r-timeline-item-color: var(--info-strong);
    --r-timeline-item-fill: var(--info);
  }
  &.r-timeline-item--success {
    --r-timeline-item-color: var(--success-strong);
    --r-timeline-item-fill: var(--success);
  }
  &.r-timeline-item--warning {
    --r-timeline-item-color: var(--warning-strong);
    --r-timeline-item-fill: var(--warning);
  }
  &.r-timeline-item--danger {
    --r-timeline-item-color: var(--danger-strong);
    --r-timeline-item-fill: var(--danger);
  }
  /* Accent: the emphasis tone for review-type states, e.g. "in review". */
  &.r-timeline-item--accent {
    --r-timeline-item-color: var(--task-status-in-review-strong);
    --r-timeline-item-fill: var(--task-status-in-review);
  }
  &.r-timeline-item--color {
    --r-timeline-item-color: var(--r-timeline-custom-color);
    --r-timeline-item-fill: var(--r-timeline-custom-color);
  }

  /* An icon in place of the pixel gets a 14px box. */
  &[data-icon] {
    --r-timeline-icon-size: var(--r-timeline-custom-icon-size, 14px);
    --r-timeline-axis-offset: calc(
      (var(--r-timeline-line-height) - var(--r-timeline-icon-size)) / 2
    );
  }
}

/* ─────────────────────────────────────────────────────────────────────────
   2. Component Styles
   ───────────────────────────────────────────────────────────────────────── */

.r-timeline {
  display: flex;
  flex-direction: column;
  line-height: var(--r-timeline-line-height);
  list-style: none;
  margin: 0;
  padding: 0;
}

.r-timeline-item {
  display: flex;
  gap: var(--r-timeline-gap);
  margin: 0;
  padding: 0;
}

/* The axis: the marker, centered on the title's first line, then the line down to the next item. */
.r-timeline-item__axis {
  align-items: center;
  display: flex;
  flex: none;
  flex-direction: column;
  padding-top: var(--r-timeline-axis-offset);
  width: var(--r-timeline-icon-size);
}

.r-timeline-item__marker {
  background: color-mix(
    in oklch,
    var(--r-timeline-item-fill) var(--r-timeline-marker-fill),
    transparent
  );
  border: var(--r-timeline-marker-border-width) solid
    var(--r-timeline-marker-border-color, var(--r-timeline-item-color));
  border-radius: var(--r-timeline-marker-radius);
  box-sizing: border-box;
  flex: none;
  height: var(--r-timeline-icon-size);
  width: var(--r-timeline-icon-size);
}

.r-timeline-item__icon {
  align-items: center;
  color: var(--r-timeline-item-color);
  display: flex;
  flex: none;
  font-size: var(--r-timeline-icon-size);
  height: var(--r-timeline-icon-size);
  justify-content: center;
  width: var(--r-timeline-icon-size);

  & svg {
    height: 1em;
    width: 1em;
  }
}

.r-timeline-item__line {
  border-inline-start: var(--r-timeline-line-width) solid var(--r-timeline-line-color);
  flex: 1;
  /* Runs on through the next item's offset, stopping 2px short of each
     marker: a gap of the row's own background cuts the hairline around
     each pixel. */
  margin-bottom: calc(2px - var(--r-timeline-axis-offset));
  margin-top: 2px;
}

.r-timeline-item--dashed > .r-timeline-item__axis > .r-timeline-item__line {
  border-style: dashed;
}

.r-timeline-item:last-child > .r-timeline-item__axis > .r-timeline-item__line {
  visibility: hidden;
}

.r-timeline-item__body {
  flex: 1;
  min-width: 0;
  padding-bottom: var(--r-timeline-item-gap);
}

.r-timeline-item:last-child > .r-timeline-item__body {
  padding-bottom: 0;
}

.r-timeline-title {
  color: var(--foreground-strong);
  font-family: var(--r-timeline-title-font-family);
  font-size: var(--r-timeline-title-font-size);
  font-weight: var(--r-timeline-title-font-weight);
  margin-bottom: var(--r-timeline-item-inner-gap);
  overflow-wrap: anywhere;
}

.r-timeline-content {
  color: var(--foreground-hint);
  font-family: var(--font-mono);
  font-size: var(--r-timeline-content-font-size);
  line-height: 16px;
  overflow-wrap: anywhere;
}

.r-timeline-time {
  color: var(--foreground-hint);
  font-family: var(--font-mono);
  font-size: var(--r-timeline-time-font-size);
  margin-top: var(--r-timeline-item-inner-gap);
  white-space: nowrap;
}

/* Markers on the left: the row is [pixel | text | time], the time at the end
   of the first line. */
.r-timeline--left > .r-timeline-item > .r-timeline-item__body {
  column-gap: var(--r-timeline-gap);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;

  & > * {
    grid-column: 1;
  }
  & > .r-timeline-time {
    grid-column: 2;
    grid-row: 1;
    margin-top: 0;
  }
}

/* Markers on the right: the axis moves to the end and the text aligns to it. */
.r-timeline--right > .r-timeline-item {
  flex-direction: row-reverse;
  text-align: end;
}

/* Horizontal: items in a row, each marker followed by a line across to the next. */
.r-timeline--horizontal {
  flex-direction: row;
}

.r-timeline--horizontal > .r-timeline-item {
  flex: none;
  flex-direction: column;

  & > .r-timeline-item__axis {
    flex-direction: row;
    height: var(--r-timeline-icon-size);
    padding-top: 0;
    width: auto;
  }
  & > .r-timeline-item__axis > .r-timeline-item__line {
    border-inline-start: 0;
    border-top: var(--r-timeline-line-width) solid var(--r-timeline-line-color);
    margin-bottom: 0;
    margin-top: 0;
  }
  &.r-timeline-item--dashed > .r-timeline-item__axis > .r-timeline-item__line {
    border-top-style: dashed;
  }
  & > .r-timeline-item__body {
    padding-bottom: 0;
    padding-inline-end: var(--r-timeline-horizontal-item-gap);
  }
}