:root {
  --twin-bg: #f8fbff;
  --twin-ink: #112033;
  --twin-muted: #536276;
  --twin-panel: #fff;
  --twin-line: rgba(17, 32, 51, 0.09);
  --twin-rule: rgba(0, 0, 0, 0.05);
  --twin-track: #e2e8f0;
  --twin-blue: #183f8f;
  --twin-red: #b92d3a;
  --twin-gold: #c8a24d;
  --twin-green: #16a085;
  --twin-shadow: 0 24px 70px rgba(24, 54, 92, 0.16);
}

.theme-dark {
  --twin-bg: #091014;
  --twin-ink: #eef6ff;
  --twin-muted: #b2c1ce;
  --twin-panel: #10191f;
  --twin-line: rgba(238, 246, 255, 0.1);
  --twin-rule: rgba(255, 255, 255, 0.05);
  --twin-track: rgba(238, 246, 255, 0.12);
  --twin-blue: #8fb5ff;
  --twin-red: #ff6b78;
  --twin-gold: #ffd166;
  --twin-green: #45d3b4;
  --twin-shadow: 0 24px 70px rgba(0, 0, 0, 0.38);
}

.twin-lab {
  display: grid;
  gap: 1rem;
  max-width: 1080px;
  margin: 0 auto;
  padding: 1rem;
  color: var(--twin-ink);
  background: var(--twin-bg);
  font-variant-numeric: tabular-nums;
  border: 1px solid var(--twin-line);
  border-radius: 8px;
  box-shadow: var(--twin-shadow);
}

@media (min-width: 860px) {
  .twin-lab {
    grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.75fr);
    gap: 1.25rem;
    padding: 1.25rem;
  }
}

.twin-viewport,
.twin-console {
  min-width: 0;
}

.twin-viewport {
  display: grid;
  gap: 1rem;
}

.twin-orbit {
  position: relative;
  min-height: 360px;
  overflow: hidden;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--twin-panel) 92%, var(--twin-bg)), var(--twin-panel)),
    var(--twin-panel);
  border: 1px solid var(--twin-line);
  border-radius: 8px;
}

.twin-earth,
.twin-ship-clock {
  position: absolute;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-sizing: border-box;
  width: 132px;
  min-height: 116px;
  padding: 1.25rem 1.5rem;
  background: color-mix(in srgb, var(--twin-panel) 88%, transparent);
  border: 1px solid var(--twin-line);
  border-radius: 8px;
}

.twin-earth {
  left: 1rem;
  top: 1rem;
}

.twin-ship-clock {
  right: 1rem;
  bottom: 1rem;
}

.twin-earth span,
.twin-ship-clock span,
.twin-metric span,
.twin-field span {
  color: var(--twin-muted);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.twin-earth strong,
.twin-ship-clock strong {
  font-size: 2rem;
  line-height: 1;
  letter-spacing: 0;
}

.twin-path {
  position: absolute;
  inset: 112px 18px;
  display: flex;
  align-items: center;
  border-bottom: 0;
}

.twin-path::before {
  content: "";
  position: absolute;
  left: 8%;
  right: 8%;
  top: 50%;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--twin-blue), var(--twin-blue) 10px, transparent 10px, transparent 27px);
  transform: translateY(-50%);
  opacity: 0.52;
}

.twin-turnaround {
  position: absolute;
  left: var(--turnaround-progress, 71%);
  top: 50%;
  width: 1px;
  height: 118px;
  background: var(--twin-red);
  transform: translate(-50%, -50%);
  opacity: 0.48;
}

.twin-turnaround::after {
  content: "";
  position: absolute;
  left: -7px;
  top: -7px;
  width: 14px;
  height: 14px;
  background: var(--twin-red);
  border-radius: 50%;
}

.twin-ship {
  position: absolute;
  left: var(--ship-progress, 71%);
  top: 50%;
  width: 46px;
  height: 22px;
  background: linear-gradient(90deg, color-mix(in srgb, var(--twin-gold) 80%, var(--twin-panel)), var(--twin-red));
  border-radius: 999px 40% 40% 999px;
  transform: translate(-50%, -50%);
  box-shadow: none;
}

.twin-ship::before {
  content: "";
  position: absolute;
  right: -12px;
  top: 6px;
  border-left: 16px solid var(--twin-blue);
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
}

.twin-ship::after {
  content: var(--clock-rate, "50%");
  position: absolute;
  left: 50%;
  top: 32px;
  min-width: 58px;
  padding: 0.2rem 0.35rem;
  color: var(--twin-panel);
  background: var(--twin-ink);
  border-radius: 8px;
  font-size: 0.72rem;
  text-align: center;
  transform: translateX(-50%);
}

.twin-worldline {
  width: 100%;
  min-height: 220px;
  background: linear-gradient(180deg, var(--twin-panel), color-mix(in srgb, var(--twin-panel) 88%, var(--twin-bg)));
  border: 1px solid var(--twin-line);
  border-radius: 8px;
}

.twin-lab-grid circle {
  fill: var(--twin-muted);
  opacity: 0.18;
  transition: opacity 0.18s ease;
}

.twin-earth-line,
.twin-ship-line {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.twin-earth-line {
  stroke: var(--twin-green);
  stroke-width: 4;
  opacity: 0.84;
}

.twin-ship-line {
  stroke: var(--twin-red);
  stroke-width: 4;
  opacity: 0.88;
}

.twin-event {
  fill: var(--twin-blue);
}

.twin-event-return {
  fill: var(--twin-red);
}

.twin-console {
  display: grid;
  align-content: start;
  gap: 1rem;
  padding: 1rem 1rem 0.7rem;
  background: color-mix(in srgb, var(--twin-panel) 82%, transparent);
  border-left: 1px solid var(--twin-rule);
  border-radius: 0;
}

.twin-presets {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.45rem;
}

.twin-presets button {
  min-height: 42px;
  padding: 0.55rem 0.45rem;
  color: var(--twin-ink);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.78rem;
  opacity: 0.4;
}

.twin-presets button.active,
.twin-presets button:hover {
  color: var(--twin-ink);
  background: color-mix(in srgb, var(--twin-blue) 9%, transparent);
  border-color: transparent;
  backdrop-filter: blur(8px);
  font-weight: 600;
  opacity: 1;
}

.twin-field {
  display: grid;
  gap: 0.55rem;
  padding-top: 1rem;
  border-top: 1px solid var(--twin-rule);
}

.twin-field output {
  justify-self: start;
  color: var(--twin-blue);
  font-size: 1.55rem;
  font-weight: 800;
}

.twin-field input {
  width: 100%;
  height: 3px;
  appearance: none;
  background: linear-gradient(90deg, var(--twin-blue) 0 var(--fill, 50%), var(--twin-track) var(--fill, 50%) 100%);
  border-radius: 999px;
  cursor: pointer;
}

.twin-field input::-webkit-slider-thumb {
  width: 13px;
  height: 13px;
  appearance: none;
  background: color-mix(in srgb, var(--twin-gold) 72%, transparent);
  border: 1px solid var(--twin-panel);
  border-radius: 50%;
  box-shadow: 0 0 0 1px var(--twin-line);
}

.twin-field input:active::-webkit-slider-thumb,
.twin-field input:focus-visible::-webkit-slider-thumb {
  background: var(--twin-gold);
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--twin-gold) 24%, transparent);
}

.twin-readout {
  display: grid;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--twin-rule);
}

.twin-reunion {
  display: grid;
  gap: 0.15rem;
}

.twin-reunion > span {
  color: var(--twin-muted);
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
}

.twin-reunion strong {
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
  color: var(--twin-ink);
  font-size: clamp(3.6rem, 11.8vw, 5.75rem);
  font-weight: 800;
  line-height: 0.9;
  letter-spacing: 0;
}

.twin-reunion small {
  color: var(--twin-muted);
  font-size: clamp(1.45rem, 4vw, 2rem);
  font-weight: 700;
  line-height: 1;
}

.twin-results {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--twin-rule);
  margin-inline: -1rem;
}

.twin-metric {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 0.9rem;
  padding: 1rem;
  background: transparent;
  border-bottom: 1px solid var(--twin-rule);
  border-radius: 0;
}

.twin-metric strong {
  color: var(--twin-ink);
  font-size: 1.1rem;
  font-weight: 800;
  text-align: right;
}

@media (max-width: 520px) {
  .twin-lab {
    padding: 0.7rem;
  }

  .twin-orbit {
    min-height: 320px;
  }

  .twin-earth,
  .twin-ship-clock {
    width: 116px;
    padding: 0.7rem;
  }

  .twin-presets {
    grid-template-columns: 1fr;
  }
}