.phase-lab {
  --phase-ink: #182028;
  --phase-muted: rgba(24, 32, 40, 0.62);
  --phase-panel: rgba(255, 255, 255, 0.72);
  --phase-line: rgba(24, 32, 40, 0.12);
  --phase-hairline: rgba(24, 32, 40, 0.09);
  --phase-label: #5f6b70;
  --phase-track: rgba(24, 32, 40, 0.25);
  --phase-solid: #8ea3b0;
  --phase-liquid: #2e8bc0;
  --phase-gas: #e3b341;
  --phase-super: #36b18f;
  --phase-critical: #e65355;

  display: grid;
  gap: 1rem;
  width: min(100%, 1180px);
  padding: clamp(1rem, 3vw, 1.7rem);
  color: var(--phase-ink);
  background:
    linear-gradient(135deg, rgba(227, 179, 65, 0.18), transparent 32%),
    linear-gradient(225deg, rgba(54, 177, 143, 0.18), transparent 34%),
    #eef3f1;
  border: 1px solid rgba(24, 32, 40, 0.08);
  border-radius: 8px;
  box-shadow: 0 28px 70px rgba(32, 58, 64, 0.16);
}

.theme-dark .phase-lab {
  --phase-ink: #f7fbf7;
  --phase-muted: rgba(247, 251, 247, 0.66);
  --phase-panel: rgba(8, 16, 20, 0.74);
  --phase-line: rgba(247, 251, 247, 0.13);
  --phase-hairline: rgba(247, 251, 247, 0.11);
  --phase-label: rgba(247, 251, 247, 0.58);
  --phase-track: rgba(247, 251, 247, 0.24);

  background:
    linear-gradient(135deg, rgba(227, 179, 65, 0.18), transparent 32%),
    linear-gradient(225deg, rgba(54, 177, 143, 0.22), transparent 34%),
    #081014;
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.38);
}

.phase-panel,
.phase-map-shell {
  min-width: 0;
}

.phase-panel {
  display: grid;
  gap: 1.15rem;
  align-content: start;
  padding: 0.25rem 0.1rem;
  background: transparent;
  border: 0;
  border-radius: 0;
}

.phase-field {
  display: grid;
  gap: 0.62rem;
  padding-bottom: 1.05rem;
  border-bottom: 1px solid var(--phase-hairline);
}

.phase-field span,
.phase-readout > span,
.phase-meter span,
.phase-coexistence-head span {
  color: var(--phase-muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.phase-field output,
.phase-readout strong {
  font-weight: 760;
  line-height: 0.92;
}

.phase-field output {
  font-size: clamp(1.65rem, 7vw, 3rem);
}

.phase-field select {
  width: 100%;
  min-height: 42px;
  padding: 0 2.2rem 0 0.45rem;
  color: var(--phase-ink);
  appearance: none;
  background:
    linear-gradient(45deg, transparent 50%, currentcolor 50%) right 0.92rem center / 6px 6px no-repeat,
    linear-gradient(135deg, currentcolor 50%, transparent 50%) right 0.58rem center / 6px 6px no-repeat;
  border: 0;
  border-bottom: 1px solid var(--phase-line);
  border-radius: 0;
  font-weight: 700;
}

.theme-dark .phase-field select {
  color: var(--phase-ink);
  background:
    linear-gradient(45deg, transparent 50%, currentcolor 50%) right 0.92rem center / 6px 6px no-repeat,
    linear-gradient(135deg, currentcolor 50%, transparent 50%) right 0.58rem center / 6px 6px no-repeat,
    #081014;
}

.phase-field select option {
  color: #182028;
  background: #eef3f1;
}

.theme-dark .phase-field select option {
  color: #f7fbf7;
  background: #081014;
}

.phase-field input[type='range'] {
  --fill: 50%;

  width: 100%;
  height: 24px;
  margin: 0;
  appearance: none;
  background: transparent;
}

.phase-field input[type='range']::-webkit-slider-runnable-track {
  height: 2px;
  border-radius: 0;
  background:
    linear-gradient(90deg, var(--phase-ink) 0, var(--phase-ink) var(--fill), var(--phase-track) var(--fill), var(--phase-track) 100%);
}

.phase-field input[type='range']::-webkit-slider-thumb {
  width: 13px;
  height: 13px;
  margin-top: -5.5px;
  border: 2px solid var(--phase-ink);
  border-radius: 50%;
  appearance: none;
  background: var(--phase-panel);
  box-shadow: none;
  cursor: grab;
}

.phase-field input[type='range']::-moz-range-track {
  height: 2px;
  border-radius: 0;
  background: var(--phase-track);
}

.phase-field input[type='range']::-moz-range-progress {
  height: 2px;
  border-radius: 0;
  background: var(--phase-ink);
}

.phase-field input[type='range']::-moz-range-thumb {
  width: 13px;
  height: 13px;
  border: 2px solid var(--phase-ink);
  border-radius: 50%;
  background: var(--phase-panel);
  box-shadow: none;
  cursor: grab;
}

#phase-reset {
  justify-self: start;
  min-height: 32px;
  padding: 0;
  color: var(--phase-muted);
  background: transparent;
  border: 0;
  border-radius: 0;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  opacity: 0.62;
  transition: opacity 160ms ease;
}

#phase-reset:hover {
  opacity: 1;
}

.theme-dark #phase-reset {
  color: var(--phase-muted);
  background: transparent;
}

.phase-map-shell {
  padding: 0;
  overflow: visible;
  background: transparent;
  border: 0;
  border-radius: 0;
}

.phase-map-frame {
  position: relative;
  padding: 0 0 1.05rem 1.1rem;
}

.theme-dark .phase-map-shell {
  background: transparent;
}

.phase-map {
  display: block;
  width: 100%;
  height: auto;
  min-height: clamp(390px, 52vw, 560px);
}

.phase-axis-label {
  position: absolute;
  color: var(--phase-muted);
  font-size: 0.58rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  opacity: 0.58;
  pointer-events: none;
  text-transform: uppercase;
}

.phase-axis-label-y {
  top: 50%;
  left: 0;
  transform: translate(-48%, -50%) rotate(-90deg);
  transform-origin: center;
}

.phase-axis-label-x {
  bottom: 0;
  left: calc(1.1rem + 50%);
  transform: translateX(-50%);
}

.phase-region {
  stroke: none;
}

.phase-region-gas {
  fill: rgba(227, 179, 65, 0.06);
}

.phase-region-solid {
  fill: rgba(142, 163, 176, 0.08);
}

.phase-region-liquid {
  fill: rgba(46, 139, 192, 0.07);
}

.phase-region-supercritical {
  fill: rgba(54, 177, 143, 0.07);
}

.phase-grid {
  fill: none;
  stroke: var(--phase-hairline);
  stroke-width: 1;
}

.phase-boundary {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.phase-vapor {
  stroke: var(--phase-critical);
  stroke-width: 1.5;
}

.phase-melt {
  stroke: var(--phase-ink);
  stroke-width: 1.5;
  stroke-dasharray: 8 10;
  opacity: 0.62;
}

.phase-point circle {
  fill: var(--phase-ink);
  stroke: #fff;
  stroke-width: 2;
}

.phase-critical circle {
  fill: var(--phase-critical);
}

.phase-point text,
.phase-region-label {
  fill: var(--phase-ink);
  font-weight: 800;
}

.phase-point text {
  font-size: 10px;
  letter-spacing: 0.08em;
  opacity: 0.5;
  paint-order: stroke;
  stroke: #eef3f1;
  stroke-width: 4px;
  stroke-linejoin: round;
  text-transform: uppercase;
}

.theme-dark .phase-point text {
  stroke: #081014;
}

.phase-region-label {
  fill: var(--phase-label);
  font-size: 10px;
  letter-spacing: 0.14em;
  opacity: 0.5;
  paint-order: stroke;
  stroke: rgba(238, 243, 241, 0.7);
  stroke-width: 4px;
  stroke-linejoin: round;
  text-transform: uppercase;
}

.theme-dark .phase-region-label {
  stroke: rgba(8, 16, 20, 0.74);
}

.phase-sample-marker {
  transition: transform 260ms cubic-bezier(0.16, 1, 0.3, 1);
}

.phase-sample-trail {
  fill: none;
  stroke: var(--phase-critical);
  transform-origin: center;
}

.phase-sample-trail-outer {
  stroke-width: 1;
  opacity: 0.26;
  animation: phase-pulse 1800ms ease-in-out infinite;
}

.phase-sample-trail-inner {
  stroke-width: 4;
  stroke-dasharray: 7 10;
  opacity: 0.36;
  animation: phase-spin 5200ms linear infinite;
}

.phase-sample-dot {
  fill: var(--phase-critical);
  stroke: #fff;
  stroke-width: 3;
}

.phase-sample-marker[data-phase='solid'] .phase-sample-dot {
  fill: var(--phase-solid);
}

.phase-sample-marker[data-phase='liquid'] .phase-sample-dot {
  fill: var(--phase-liquid);
}

.phase-sample-marker[data-phase='gas'] .phase-sample-dot {
  fill: var(--phase-gas);
}

.phase-sample-marker[data-phase='supercritical'] .phase-sample-dot {
  fill: var(--phase-super);
}

.phase-readout {
  min-width: 0;
  max-width: 100%;
  overflow: hidden;
  align-content: start;
  padding-top: 1rem;
  border-top: 1px solid var(--phase-hairline);
}

.phase-readout strong {
  display: block;
  max-width: 100%;
  overflow-wrap: anywhere;
  font-size: clamp(2.2rem, 7vw, 4.2rem);
}

.phase-readout p {
  margin: 0;
  color: var(--phase-muted);
  line-height: 1.55;
}

.phase-meter {
  display: grid;
  gap: 0.55rem;
  min-width: 0;
  padding-top: 0.75rem;
  border-top: 1px solid var(--phase-hairline);
}

.phase-meter div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.phase-meter output {
  font-weight: 800;
}

.phase-meter i {
  --value: 0;

  display: block;
  height: 4px;
  overflow: hidden;
  background: rgba(24, 32, 40, 0.12);
  border-radius: 0;
}

.phase-meter i::before {
  display: block;
  width: calc(var(--value) * 100%);
  height: 100%;
  background: linear-gradient(90deg, var(--phase-gas), var(--phase-critical), var(--phase-super));
  content: "";
}

.phase-coexistence {
  display: grid;
  gap: 0.65rem;
  min-width: 0;
  overflow: hidden;
  padding-top: 0.8rem;
  border-top: 1px solid var(--phase-hairline);
}

.phase-coexistence-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 0.65rem;
  align-items: center;
}

.phase-coexistence-head span,
.phase-coexistence-head output {
  color: var(--phase-muted);
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  min-width: 0;
  text-transform: uppercase;
}

.phase-coexistence-head span:last-child {
  text-align: right;
}

.phase-coexistence-head output {
  color: var(--phase-ink);
}

.phase-coexistence-axis {
  position: relative;
  width: 100%;
  height: 24px;
}

.phase-coexistence-axis::before {
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--phase-track);
  content: "";
}

.phase-coexistence-axis::after {
  position: absolute;
  top: 50%;
  right: 0;
  width: calc(var(--coexistence, 0) * 100%);
  height: 1px;
  background: var(--phase-critical);
  box-shadow: 0 0 14px rgba(230, 83, 85, 0.26);
  content: "";
}

.phase-coexistence-axis i {
  --value: 0;

  position: absolute;
  top: 50%;
  left: calc(var(--value) * 100%);
  width: 9px;
  height: 9px;
  background: var(--phase-critical);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: left 260ms cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes phase-pulse {
  0%,
  100% {
    opacity: 0.16;
    transform: scale(0.9);
  }

  50% {
    opacity: 0.34;
    transform: scale(1.12);
  }
}

@keyframes phase-spin {
  to {
    transform: rotate(360deg);
  }
}

@media (min-width: 900px) {
  .phase-lab {
    grid-template-columns: minmax(190px, 0.44fr) minmax(0, 1.9fr) minmax(230px, 0.54fr);
    align-items: stretch;
  }

  .phase-controls {
    padding-right: clamp(0rem, 2vw, 1rem);
    border-right: 1px solid var(--phase-hairline);
  }

  .phase-readout {
    padding-top: 0.25rem;
    padding-left: clamp(0rem, 2vw, 1rem);
    border-top: 0;
    border-left: 1px solid var(--phase-hairline);
  }

  .phase-readout strong {
    font-size: clamp(2.25rem, 4.1vw, 3.35rem);
  }
}