* {
  box-sizing: border-box;
}

html {
  background: var(--game-bg);
}

body {
  display: grid;
  min-width: 0;
  min-height: 100svh;
  margin: 0;
  padding: 0.75rem;
  place-items: center;
  color: var(--game-text);
  background:
    linear-gradient(
      145deg,
      color-mix(in srgb, var(--game-accent-soft) 34%, transparent),
      transparent 46%
    ),
    var(--game-bg);
  font-family: var(--game-font);
}

button,
output {
  font: inherit;
}

.lab {
  display: grid;
  width: min(100%, 440px);
  min-width: 0;
  min-height: min(100svh, 620px);
  padding: clamp(0.7rem, 3vw, 1rem);
  align-content: center;
  gap: 0.6rem;
  background: var(--game-bg);
  border: 1px solid var(--game-divider);
  border-radius: var(--game-radius);
  box-shadow: var(--game-shadow);
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: 0.7rem;
}

.eyebrow {
  margin: 0 0 0.18rem;
  color: var(--game-accent);
  font-family: var(--game-mono);
  font-size: 0.58rem;
  font-weight: 750;
  letter-spacing: 0.12em;
}

h1 {
  margin: 0;
  overflow-wrap: anywhere;
  font-size: clamp(1.2rem, 5.5vw, 1.55rem);
  font-weight: 650;
  letter-spacing: -0.025em;
  line-height: 1.08;
}

.pinch-count {
  padding: 0.38rem 0.5rem;
  color: var(--game-muted);
  background: var(--game-surface);
  border: 1px solid var(--game-divider);
  border-radius: var(--game-radius);
  font-family: var(--game-mono);
  font-size: 0.58rem;
  white-space: nowrap;
}

.help {
  margin: 0;
  color: var(--game-muted);
  font-size: clamp(0.62rem, 2.8vw, 0.72rem);
  line-height: 1.4;
}

.field {
  position: relative;
  width: 100%;
  min-width: 0;
  height: clamp(250px, 72vw, 285px);
  overflow: hidden;
  background: linear-gradient(
    to bottom,
    color-mix(in srgb, var(--game-accent-soft) 34%, var(--game-surface)) 0 49.7%,
    var(--game-divider) 49.8% 50.2%,
    color-mix(in srgb, var(--game-accent-soft) 18%, var(--game-surface)) 50.3%
      100%
  );
  border: 1px solid var(--game-divider);
  border-radius: var(--game-radius);
  isolation: isolate;
}

.field::after {
  position: absolute;
  inset: 0 auto 0 -22%;
  z-index: 5;
  width: 18%;
  content: "";
  background: linear-gradient(
    90deg,
    transparent,
    color-mix(in srgb, var(--game-accent) 24%, transparent),
    transparent
  );
  opacity: 0;
  pointer-events: none;
}

.field[data-optimizing="true"]::after {
  opacity: 1;
  animation: search-sweep 760ms linear infinite;
}

.field-graphic,
.pinch-layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.field-graphic {
  z-index: 1;
}

.pinch-layer {
  z-index: 4;
  pointer-events: none;
}

.coverage-lobe {
  fill: color-mix(in srgb, var(--game-accent) 22%, transparent);
  stroke: color-mix(in srgb, var(--game-accent) 74%, transparent);
  stroke-width: 3;
  vector-effect: non-scaling-stroke;
}

.coverage-lobe:nth-child(even) {
  fill: color-mix(in srgb, var(--game-accent-strong) 18%, transparent);
}

.interference-zone {
  fill: color-mix(in srgb, var(--game-warning) 58%, transparent);
  stroke: color-mix(in srgb, var(--game-warning) 82%, transparent);
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
}

.waveguide-shadow {
  fill: color-mix(in srgb, var(--game-text) 18%, transparent);
}

.waveguide {
  fill: var(--game-surface-strong);
  stroke: var(--game-muted);
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
}

.guide-core {
  stroke: var(--game-accent);
  stroke-dasharray: 9 8;
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
}

.direction-label {
  position: absolute;
  left: 0.45rem;
  z-index: 3;
  color: var(--game-muted);
  font-family: var(--game-mono);
  font-size: 0.5rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  pointer-events: none;
}

.direction-up {
  top: 0.35rem;
}

.direction-down {
  bottom: 0.35rem;
}

.pinch {
  --pinch-offset: -13px;

  position: absolute;
  top: 50%;
  left: var(--pinch-x, 50%);
  display: grid;
  width: 44px;
  height: 44px;
  padding: 0;
  place-items: center;
  color: var(--game-text);
  background: transparent;
  border: 0;
  cursor: grab;
  pointer-events: auto;
  touch-action: none;
  transform: translate(-50%, -50%) translateY(var(--pinch-offset));
  transition:
    left 120ms ease,
    transform 120ms ease;
}

.pinch[data-direction="down"] {
  --pinch-offset: 13px;
}

.pinch.is-dragging {
  cursor: grabbing;
  transition: none;
}

.pinch:disabled {
  cursor: wait;
}

.pinch-core {
  display: grid;
  width: 31px;
  height: 31px;
  place-content: center;
  place-items: center;
  color: var(--game-on-accent);
  background: var(--game-accent);
  border: 2px solid var(--game-bg);
  border-radius: 50%;
  box-shadow: 0 0 0 2px var(--game-accent-strong);
  font-family: var(--game-mono);
  line-height: 1;
}

.pinch-number {
  font-size: 0.64rem;
  font-weight: 850;
}

.pinch-arrow {
  margin-top: -1px;
  font-size: 0.55rem;
}

.pinch:focus-visible {
  outline: 0;
}

.pinch:focus-visible .pinch-core {
  outline: 3px solid var(--game-warning);
  outline-offset: 3px;
}

.user {
  stroke: var(--game-bg);
  stroke-width: 4;
  vector-effect: non-scaling-stroke;
}

.user-clean {
  fill: var(--game-accent-strong);
}

.user-interfered {
  fill: var(--game-warning);
}

.user-missed {
  fill: var(--game-muted);
  opacity: 0.78;
}

.legend {
  display: flex;
  min-width: 0;
  flex-wrap: wrap;
  gap: 0.3rem 0.75rem;
  color: var(--game-muted);
  font-size: 0.58rem;
}

.legend > span {
  display: inline-flex;
  align-items: center;
  gap: 0.28rem;
}

.legend i {
  display: inline-block;
  flex: 0 0 auto;
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 2px;
}

.coverage-swatch {
  background: color-mix(in srgb, var(--game-accent) 44%, transparent);
  border: 1px solid var(--game-accent);
}

.overlap-swatch {
  background: color-mix(in srgb, var(--game-warning) 58%, transparent);
  border: 1px solid var(--game-warning);
}

.served-swatch {
  background: var(--game-accent-strong);
  border: 1px solid var(--game-bg);
  box-shadow: 0 0 0 1px var(--game-accent-strong);
  border-radius: 50% !important;
}

.missed-swatch {
  background: var(--game-muted);
  border-radius: 50% !important;
}

.metrics {
  display: grid;
  margin: 0;
  padding: 0.48rem 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-block: 1px solid var(--game-divider);
}

.metrics div {
  min-width: 0;
  padding-inline: 0.35rem;
  text-align: center;
}

.metrics div + div {
  border-left: 1px solid var(--game-divider);
}

.metrics dt {
  min-height: 2.4em;
  color: var(--game-muted);
  font-size: clamp(0.54rem, 2.4vw, 0.64rem);
  line-height: 1.2;
}

.metrics dd {
  margin: 0.1rem 0 0;
  color: var(--game-text);
  font-family: var(--game-mono);
  font-size: clamp(0.85rem, 4vw, 1rem);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.5rem;
}

.controls button {
  min-width: 0;
  min-height: 44px;
  padding: 0.55rem 0.65rem;
  border-radius: var(--game-radius);
  cursor: pointer;
  font-size: clamp(0.66rem, 2.8vw, 0.76rem);
  font-weight: 760;
  line-height: 1.2;
  touch-action: manipulation;
}

.controls button:focus-visible {
  outline: 3px solid var(--game-accent);
  outline-offset: 2px;
}

.controls button:disabled {
  cursor: wait;
  opacity: 0.62;
}

.primary {
  color: var(--game-on-accent);
  background: var(--game-accent);
  border: 1px solid var(--game-accent-strong);
}

.primary:hover:not(:disabled) {
  background: var(--game-accent-strong);
}

.secondary {
  color: var(--game-accent-strong);
  background: var(--game-surface);
  border: 1px solid var(--game-divider);
}

.secondary:hover:not(:disabled) {
  background: var(--game-accent-soft);
  border-color: var(--game-accent);
}

.status {
  min-height: 2.7em;
  margin: 0;
  color: var(--game-muted);
  font-size: clamp(0.62rem, 2.7vw, 0.72rem);
  line-height: 1.35;
  text-align: center;
}

html[data-embed="true"] body {
  padding: 0;
  place-items: stretch;
}

html[data-embed="true"] .lab {
  width: 100%;
  max-width: none;
  min-height: 100svh;
  border: 0;
  box-shadow: none;
}

@keyframes search-sweep {
  to {
    transform: translateX(700%);
  }
}

@media (max-width: 320px) {
  body {
    padding: 0.45rem;
  }

  .lab {
    padding: 0.6rem;
    gap: 0.48rem;
  }

  .intro {
    gap: 0.4rem;
  }

  .field {
    height: 250px;
  }

  .legend {
    gap-inline: 0.5rem;
  }

  .metrics div {
    padding-inline: 0.18rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .field::after {
    display: none;
    animation: none;
  }

  .pinch {
    transition: none;
  }
}