/* Parallel Tracks widget.
   Dark card. Four horizontal bars that fill from 0 to their target
   width, staggered in time, against a timeline ruler. Meter strip
   at the bottom. All motion is CSS-only and respects
   prefers-reduced-motion. */

.widget-parallel-tracks {
  --wpt-teal: var(--brand-teal);
  --wpt-blue: var(--brand-blue);
  --wpt-surface: var(--surface-dark-999, #0a0a0c);
  --wpt-fg: var(--on-dark-foreground);
  --wpt-muted: var(--on-dark-muted-foreground);
  --wpt-line: color-mix(in oklch, var(--wpt-fg) 10%, transparent);
  --wpt-line-soft: color-mix(in oklch, var(--wpt-fg) 6%, transparent);
  --wpt-track-bg: color-mix(in oklch, var(--wpt-fg) 7%, transparent);

  min-width: 0;
  width: 100%;
}

.widget-parallel-tracks__card {
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 0.75rem;
  padding: 0.875rem 0.875rem 0.75rem;
  background: linear-gradient(
    180deg,
    color-mix(in oklch, var(--wpt-surface) 95%, transparent) 0%,
    color-mix(in oklch, var(--wpt-surface) 98%, transparent) 100%
  );
  border: 1px solid var(--wpt-line);
  border-radius: var(--radius-lg);
  box-shadow:
    0 1px 0 color-mix(in oklch, var(--wpt-fg) 6%, transparent) inset,
    0 16px 40px -20px rgb(0 0 0 / 45%);
  color: var(--wpt-fg);
  --color-foreground: var(--wpt-fg);
  --color-muted-foreground: var(--wpt-muted);
  --color-border: var(--wpt-line);
}

/* --- Head row ------------------------------------------------------- */

.widget-parallel-tracks__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.125rem 0.25rem;
}

.widget-parallel-tracks__tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--wpt-fg);
}

.widget-parallel-tracks__tag-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 999px;
  background: var(--wpt-teal);
  box-shadow:
    0 0 0 3px color-mix(in oklch, var(--wpt-teal) 22%, transparent),
    0 0 10px color-mix(in oklch, var(--wpt-teal) 55%, transparent);
  animation: wpt-tag-breathe 2.6s ease-in-out infinite;
}

.widget-parallel-tracks__status {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--wpt-muted);
}

/* --- Stage: tracks + ruler ----------------------------------------- */

.widget-parallel-tracks__stage {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 0.75rem 0.75rem 1rem;
  background:
    radial-gradient(circle at 20% 30%,
      color-mix(in oklch, var(--wpt-teal) 8%, transparent) 0%,
      transparent 60%),
    color-mix(in oklch, var(--wpt-surface) 92%, transparent);
  border: 1px solid color-mix(in oklch, var(--wpt-fg) 7%, transparent);
  border-radius: var(--radius-md);
}

.widget-parallel-tracks__track {
  display: grid;
  grid-template-columns: 4.75rem 1fr 4rem;
  align-items: center;
  gap: 0.625rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
}

.widget-parallel-tracks__track-label {
  color: var(--wpt-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: var(--font-weight-medium);
}

.widget-parallel-tracks__track-bar {
  position: relative;
  display: block;
  height: 0.625rem;
  background: var(--wpt-track-bg);
  border-radius: 999px;
  overflow: hidden;
  box-shadow: inset 0 0 0 1px color-mix(in oklch, var(--wpt-fg) 6%, transparent);
}

.widget-parallel-tracks__track-fill {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--wpt-teal) 0%, var(--wpt-blue) 100%);
  border-radius: inherit;
  box-shadow: 0 0 8px -1px color-mix(in oklch, var(--wpt-teal) 55%, transparent);
  animation: wpt-fill 6.2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
  animation-delay: var(--delay, 0s);
}

/* Milestone marker rides just past the filled portion. */
.widget-parallel-tracks__track-marker {
  position: absolute;
  top: 50%;
  left: calc(var(--mark, 0) * 1%);
  width: 0.4375rem;
  height: 0.4375rem;
  margin-left: -0.21875rem;
  margin-top: -0.21875rem;
  border-radius: 999px;
  background: var(--wpt-fg);
  opacity: 0;
  box-shadow: 0 0 6px color-mix(in oklch, var(--wpt-teal) 70%, transparent);
  animation: wpt-marker 6.2s ease-in-out infinite;
  animation-delay: var(--delay, 0s);
}

.widget-parallel-tracks__track-mark {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.08em;
  color: color-mix(in oklch, var(--wpt-teal) 70%, var(--wpt-fg));
  text-align: right;
  white-space: nowrap;
}

@keyframes wpt-fill {
  0%   { width: 0; }
  40%  { width: calc(var(--fill) * 1%); }
  80%  { width: calc(var(--fill) * 1%); }
  92%  { width: calc(var(--fill) * 1%); opacity: 0.6; }
  100% { width: 0; opacity: 0; }
}

@keyframes wpt-marker {
  0%, 30%   { opacity: 0; transform: scale(0.6); }
  45%       { opacity: 1; transform: scale(1.2); }
  60%, 85%  { opacity: 1; transform: scale(1); }
  100%      { opacity: 0; transform: scale(0.6); }
}

/* --- Timeline ruler ------------------------------------------------ */

.widget-parallel-tracks__ruler {
  position: relative;
  display: block;
  height: 1.25rem;
  margin-top: 0.375rem;
  margin-left: 5.375rem;  /* align under track bars (label + gap offset) */
  margin-right: 4.625rem;
  border-top: 1px dashed color-mix(in oklch, var(--wpt-fg) 14%, transparent);
}

.widget-parallel-tracks__ruler-tick {
  position: absolute;
  top: 0.375rem;
  left: calc(var(--t, 0) * 1%);
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.1em;
  color: var(--wpt-muted);
  white-space: nowrap;
}

.widget-parallel-tracks__ruler-tick::before {
  content: "";
  display: block;
  width: 1px;
  height: 0.25rem;
  background: color-mix(in oklch, var(--wpt-fg) 22%, transparent);
  margin: -0.5rem auto 0.125rem;
}

/* --- Meter strip --------------------------------------------------- */

.widget-parallel-tracks__meters {
  display: grid;
  grid-template-columns: 1.25fr 1fr 1fr;
  gap: 0.5rem;
  padding: 0.5rem 0.375rem 0;
  border-top: 1px solid color-mix(in oklch, var(--wpt-fg) 7%, transparent);
}

.widget-parallel-tracks__meter {
  display: flex;
  flex-direction: column;
  gap: 0.1875rem;
  padding: 0.25rem 0.375rem;
  min-width: 0;
}

.widget-parallel-tracks__meter-label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--wpt-muted);
}

.widget-parallel-tracks__meter-value {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: var(--font-weight-medium);
  color: var(--wpt-fg);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

/* --- Head dot breathe --------------------------------------------- */

@keyframes wpt-tag-breathe {
  0%, 100% {
    box-shadow:
      0 0 0 3px color-mix(in oklch, var(--wpt-teal) 22%, transparent),
      0 0 10px color-mix(in oklch, var(--wpt-teal) 55%, transparent);
  }
  50% {
    box-shadow:
      0 0 0 5px color-mix(in oklch, var(--wpt-teal) 14%, transparent),
      0 0 16px color-mix(in oklch, var(--wpt-teal) 70%, transparent);
  }
}

/* --- Responsive: narrow viewports --------------------------------- */

@media (max-width: 560px) {
  .widget-parallel-tracks__track {
    grid-template-columns: 3.75rem 1fr 3.25rem;
    gap: 0.5rem;
  }
  .widget-parallel-tracks__ruler {
    margin-left: 4.25rem;
    margin-right: 3.75rem;
  }
  .widget-parallel-tracks__meters {
    grid-template-columns: 1fr;
  }
}

/* --- Reduced motion ----------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  .widget-parallel-tracks__tag-dot,
  .widget-parallel-tracks__track-fill,
  .widget-parallel-tracks__track-marker {
    animation: none;
  }
  /* Park fills at their target state so the still frame still reads
     "four tracks in flight" rather than an empty scoreboard. */
  .widget-parallel-tracks__track-fill { width: calc(var(--fill) * 1%); }
  .widget-parallel-tracks__track-marker { opacity: 1; transform: scale(1); }
}