//
// METRICS — light
// ===============
// Browser Metrics tab cards (Navigation Timing, Google Web Vitals, Extra
// timings, User Timing marks/measures). Each metric is rendered as a
// label-over-value tile so the cards flow in multiple columns instead of
// one row per metric.
//

// Tiny dashed-border hint shown where the "First Contentful Paint info"
// card would appear if the run had a Chrome timeline trace / Firefox
// Gecko profile. Tells the reader the missing metrics exist and which
// flag enables them, without being loud enough to compete with the real
// metric cards above it.
.metrics-cpu-hint {
  margin: 0 0 18px 0;
  padding: 10px 14px;
  border-radius: $radius--md;
  border: 1px dashed $color--border-strong;
  background: $color--surface-card;
  color: $color--text-muted;
  font-size: 0.9rem;
  line-height: 1.5;

  code {
    font-family: $font--mono;
    font-size: 0.85em;
    background: $color--surface;
    border: 1px solid $color--border;
    border-radius: $radius--sm;
    padding: 1px 6px;
    color: $color--text;
  }
}

.metric-tiles {
  margin: 0;
  padding: 8px 14px 14px 14px;
  border-top: 1px solid $color--border;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  column-gap: 16px;
  row-gap: 10px;
}

// Tile grid nested in a .listing-card: drop the iter-group-era
// border-top and padding so the card header isn't visually doubled by
// a second divider underneath.
.listing-card > .metric-tiles {
  border-top: 0;
  padding: 0;
}

.metric-tile {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

// Label takes the remaining vertical space inside the tile so that when
// the grid stretches every tile to the row's tallest, the value lines up
// at the bottom regardless of how many lines the label wraps to.
.metric-tile-label {
  flex: 1;
  font-size: 0.72rem;
  font-weight: $font--weight--medium;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: $color--text-muted;

  a {
    color: inherit;
    border-bottom: 1px dotted $color--border;
    text-decoration: none;
  }

  a:hover {
    border-bottom-color: $color--text-muted;
  }
}

.metric-tile-value {
  font-size: 1.05rem;
  font-weight: $font--weight--semibold;
  font-variant-numeric: tabular-nums;
  color: $color--text;
  word-break: break-word;
}

// Larger variant for cards where the milestone numbers are the point of
// the section (currently the Visual Milestones list next to the
// visual-progress chart). The label gets a small bump too so the pair
// reads as a single set, not a giant value over a tiny caption.
.metric-tiles--lg {
  .metric-tile-label {
    font-size: 0.78rem;
  }
  .metric-tile-value {
    font-size: 1.25rem;
  }
}

.metric-tile-sub {
  font-size: 0.78rem;
  color: $color--text-muted;
  font-weight: $font--weight--medium;
  font-variant-numeric: tabular-nums;
}

//
// Visual progress chart — inline SVG area chart of % visually complete
// over time, with a thin time axis underneath. Sits inside the
// iter-group card body so it inherits the card's padding-to-edge.
//
.vp-chart {
  padding: 12px 14px 14px 14px;
  border-top: 1px solid $color--border;
  position: relative; // anchor for the .vp-scrubber overlay
  cursor: crosshair;
}

// Filmstrip thumbnails along the curve's X axis. Each thumb is
// absolutely positioned at its capture time as a percent across the
// available width and centred on its anchor.
.vp-thumbs {
  position: relative;
  height: 96px;
  margin: 0 24px 4px 24px;
}

.vp-thumb {
  position: absolute;
  top: 0;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  width: 76px;

  img {
    display: block;
    width: 100%;
    height: 60px;
    object-fit: cover;
    border-radius: $radius--sm;
    border: 1px solid $color--border;
    background: $color--surface;
  }

  a {
    line-height: 0;
  }
}

.vp-thumb-time {
  font-size: 0.7rem;
  color: $color--text-muted;
  font-variant-numeric: tabular-nums;
}

// Wrapping the SVG so vertical event markers can absolute-position
// against the same coordinate space.
.vp-curve-wrap {
  position: relative;
  margin: 0 24px;
}

.vp-svg {
  display: block;
  width: 100%;
  height: 140px;
  background: $color--surface;
  border: 1px solid $color--border;
  border-radius: $radius--sm;
}

.vp-marker {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 0;
  border-left: 2px dashed var(--vp-marker-color, $color--text-muted);
  pointer-events: none;
}

.vp-marker-label,
.vp-marker-time {
  position: absolute;
  left: 4px;
  background: $color--surface-card;
  border: 1px solid $color--border;
  border-radius: $radius--sm;
  padding: 1px 6px;
  font-size: 0.7rem;
  font-weight: $font--weight--semibold;
  color: var(--vp-marker-color, $color--text);
  white-space: nowrap;
}

.vp-marker-label {
  top: 4px;
}

.vp-marker-time {
  bottom: 4px;
  font-weight: $font--weight--medium;
  color: $color--text-secondary;
  font-variant-numeric: tabular-nums;
}

.vp-fill {
  fill: rgba(0, 149, 210, 0.18);
  stroke: none;
}

.vp-stroke {
  stroke: $color--blue;
  stroke-width: 1.5;
  vector-effect: non-scaling-stroke;
}

.vp-axis {
  position: relative;
  height: 16px;
  margin: 4px 24px 0 24px;
  font-size: 0.7rem;
  color: $color--text-muted;
  font-variant-numeric: tabular-nums;
}

.vp-axis-tick {
  position: absolute;
  top: 0;
  transform: translateX(-50%);
}

//
// Long-task lane — sits directly below the visual-progress curve and
// shares its X-axis. Each task is an absolutely-positioned bar at its
// startTime, width = duration. Severity tint by duration so the worst
// offenders pop visually:
//   minor   < 100 ms   amber-300
//   major   100-249ms  amber-600
//   severe  ≥ 250 ms   red-700
//
.vp-longtask-lane {
  position: relative;
  height: 16px;
  margin: 22px 24px 0 24px;
  background: $color--surface;
  border: 1px solid $color--border;
  border-radius: $radius--sm;
}

.vp-longtask-lane-label {
  position: absolute;
  left: 0;
  top: -16px;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: $color--text-muted;
  font-weight: $font--weight--medium;
}

.vp-longtask {
  position: absolute;
  top: 1px;
  bottom: 1px;
  border-radius: 1px;
  pointer-events: auto;
  cursor: help;

  &.vp-longtask--minor  { background: #fcd34d; }
  &.vp-longtask--major  { background: #d97706; }
  &.vp-longtask--severe { background: $color--error; }
}

//
// Scrubber overlay — vertical playhead spanning the full chart height,
// plus a popover that shows the closest filmstrip frame, the
// interpolated visual-progress percent, and any page-event marker /
// long task firing at the cursor's time. Pointer-events on the wrapper
// stay off so the chart's own marker / long-task tooltips still work
// when the user mouses over them; pointer-events on the popover itself
// are also off to keep the cursor "scrubbing" rather than entering it.
//
.vp-scrubber {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 4;
  opacity: 1;
  transition: opacity 100ms ease;

  &.is-hidden {
    opacity: 0;
    visibility: hidden;
  }
}

.vp-scrubber-line {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1px;
  background: $color--text;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.65);
  transform: translateX(-0.5px);
  transition: left 60ms linear;
}

.vp-scrubber-popover {
  position: absolute;
  top: 8px;
  width: 200px;
  padding: 8px;
  background: $color--surface-card;
  border: 1px solid $color--border;
  border-radius: $radius--md;
  box-shadow: $shadow--md;
  font-size: 0.78rem;
  line-height: 1.35;
  color: $color--text;
  pointer-events: none;
}

.vp-scrubber-frame-wrap {
  border-radius: $radius--sm;
  overflow: hidden;
  background: $color--surface;
  margin-bottom: 6px;
}

.vp-scrubber-frame {
  display: block;
  width: 100%;
  height: 110px;
  object-fit: cover;
  object-position: top;
}

.vp-scrubber-meta {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-variant-numeric: tabular-nums;
}

.vp-scrubber-time {
  font-weight: $font--weight--semibold;
  color: $color--text;
}

.vp-scrubber-progress {
  color: $color--text-muted;
}

.vp-scrubber-events {
  list-style: none;
  margin: 6px 0 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.vp-scrubber-events li {
  font-size: 0.72rem;
  color: $color--text-secondary;
  padding: 2px 6px 2px 8px;
  background: $color--surface;
  border-left: 3px solid $color--text-muted;
  border-radius: 0 $radius--sm $radius--sm 0;
}

//
// Element timings — each tracked element renders as a sub-card inside
// the outer iter-group, with a thumbnail (when the element is an
// image-loadable resource) on the left and metric tiles on the right.
//
.et-list {
  border-top: 1px solid $color--border;
  padding: 12px 14px 14px 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.et-card {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 14px;
  padding: 12px;
  border: 1px solid $color--border;
  border-radius: $radius--md;
  background: $color--surface-card;

  // No-thumbnail elements (text nodes) collapse to single-column.
  &:not(:has(> .et-thumb)) {
    grid-template-columns: 1fr;
  }

  @media (max-width: 600px) {
    grid-template-columns: 1fr;
  }
}

.et-thumb {
  display: flex;
  align-items: center;
  justify-content: center;
  background: $color--surface;
  border: 1px solid $color--border;
  border-radius: $radius--sm;
  overflow: hidden;

  img {
    display: block;
    width: 100%;
    height: auto;
    max-height: 140px;
    object-fit: contain;
  }
}

.et-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.et-header {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-wrap: wrap;
}

.et-id {
  font-weight: $font--weight--semibold;
  color: $color--text;
  font-size: 1rem;
  word-break: break-word;
}

.et-tag {
  font-family: $font--mono;
  font-size: 0.75rem;
  color: $color--text-muted;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 1px 8px;
  border: 1px solid $color--border;
  border-radius: $radius--pill;
  background: $color--surface;
}

// Wide tile fills the row so long URLs wrap cleanly without being
// stretched into a tiny last column of the auto-fit grid.
.et-tile--wide {
  grid-column: 1 / -1;
}

.et-card .metric-tiles {
  border-top: 0;
  padding: 0;
}

//
// Visual elements — heroes detected by visualElements (logo, heading,
// hero image). Each gets a card with display time, position, size and
// an optional collapsible HTML snippet.
//
.ve-list {
  border-top: 1px solid $color--border;
  padding: 12px 14px 14px 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ve-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px;
  border: 1px solid $color--border;
  border-radius: $radius--md;
  background: $color--surface-card;
}

.ve-header {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px 10px;
}

.ve-name {
  font-weight: $font--weight--semibold;
  color: $color--text;
  font-size: 1rem;
}

.ve-filename {
  font-family: $font--mono;
  font-size: 0.78rem;
  color: $color--text-muted;
  padding: 1px 8px;
  border: 1px solid $color--border;
  border-radius: $radius--pill;
  background: $color--surface;
  word-break: break-all;
  overflow-wrap: anywhere;
}

.ve-card .metric-tiles {
  border-top: 0;
  padding: 0;
}

// When a hero is an image (e.g. LargestImage) it renders alongside the
// metadata as a small thumbnail. The card body splits into a meta
// column and a thumbnail column on wide enough screens; on narrow
// viewports it collapses to stacked. The thumb-link is a fixed-size
// frame so even tiny logos / wordmark SVGs occupy a visible slot
// instead of rendering at their cramped natural size.
.ve-body {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
  align-items: flex-start;
}

.ve-meta {
  flex: 1 1 240px;
  min-width: 0;
}

.ve-thumb-link {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 220px;
  height: 140px;
  padding: 8px;
  border-radius: $radius--sm;
  border: 1px solid $color--border;
  background: $color--surface;
}

.ve-thumb {
  display: block;
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
}

.ve-html {
  margin-top: 4px;
  font-size: 0.85rem;

  > summary {
    cursor: pointer;
    color: $color--text-muted;
    user-select: none;
    list-style: revert;
  }

  &[open] > summary {
    color: $color--text-secondary;
  }
}

.ve-html-pre {
  margin: 6px 0 0 0;
  padding: 8px 10px;
  border-radius: $radius--sm;
  background: $color--surface;
  border: 1px solid $color--border;
  overflow-x: auto;
  font-size: 0.78rem;
  line-height: 1.45;
  color: $color--text-secondary;

  code {
    white-space: pre-wrap;
    word-break: break-word;
    overflow-wrap: anywhere;
    background: transparent;
    border: 0;
    padding: 0;
    color: inherit;
  }
}

//
// Server-Timing table — Name is a token (mono chip), Description is the
// muted secondary line. Without these the cells render as bare text and
// the card looks unfinished next to the rest of the metrics tab.
//
.server-timing-name {
  font-family: $font--mono;
  font-size: 0.85rem;
  padding: 2px 8px;
  border-radius: $radius--sm;
  background: $color--surface;
  border: 1px solid $color--border;
  color: $color--text;
}

.server-timing-desc {
  color: $color--text-secondary;
  font-size: 0.9rem;
}