:root {
  color-scheme: dark;
  font-family: "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
  background: #071018;
  color: #eef6f8;
}

* {
  box-sizing: border-box;
}

html,
body,
#app {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
}

#scene {
  display: block;
  width: 100%;
  height: 100%;
}

#sceneGui {
  --background-color: rgba(5, 15, 23, 0.86);
  --widget-color: rgba(22, 46, 62, 0.92);
  --hover-color: rgba(39, 82, 102, 0.95);
  --focus-color: rgba(63, 139, 162, 0.95);
  --text-color: #edf8fb;
  --title-background-color: rgba(12, 31, 44, 0.96);
  position: absolute;
  top: 76px;
  right: 18px;
  z-index: 6;
}

.hud {
  position: absolute;
  left: 18px;
  right: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  pointer-events: none;
}

.hud-top {
  top: 16px;
}

.hud-bottom {
  bottom: 16px;
  pointer-events: auto;
}

.title {
  font-size: 18px;
  font-weight: 650;
  letter-spacing: 0;
}

.status {
  margin-top: 4px;
  color: #bdd4dc;
  font-size: 13px;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  justify-content: flex-end;
  padding: 8px 10px;
  border: 1px solid rgba(216, 235, 241, 0.18);
  border-radius: 8px;
  background: rgba(5, 15, 23, 0.58);
  backdrop-filter: blur(8px);
  font-size: 13px;
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.swatch {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.swatch.usv {
  background: #e34242;
}

.swatch.uav {
  background: #2f7ee6;
}

.swatch.uuv {
  background: #2eaa57;
}

.swatch.target {
  background: #f2f0dd;
}

.swatch.hull {
  background: #ffc857;
}

button,
select,
input[type="range"] {
  font: inherit;
}

button,
select {
  color: #edf8fb;
  background: rgba(10, 27, 39, 0.88);
  border: 1px solid rgba(197, 226, 234, 0.3);
  border-radius: 8px;
}

button {
  min-width: 78px;
  height: 36px;
  cursor: pointer;
}

select {
  height: 34px;
  padding: 0 8px;
}

.time-slider {
  flex: 1;
  min-width: 180px;
  display: grid;
  grid-template-columns: minmax(74px, 96px) 1fr;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border: 1px solid rgba(216, 235, 241, 0.18);
  border-radius: 8px;
  background: rgba(5, 15, 23, 0.66);
  backdrop-filter: blur(8px);
}

.time-slider span,
.speed-control span {
  color: #d4e9ee;
  font-size: 13px;
  white-space: nowrap;
}

input[type="range"] {
  width: 100%;
  accent-color: #5fc3df;
}

.speed-control {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid rgba(216, 235, 241, 0.18);
  border-radius: 8px;
  background: rgba(5, 15, 23, 0.66);
  backdrop-filter: blur(8px);
}

@media (max-width: 760px) {
  .hud {
    left: 10px;
    right: 10px;
  }

  .hud-top {
    align-items: flex-start;
  }

  .legend {
    max-width: 190px;
  }

  #sceneGui {
    top: 128px;
    right: 10px;
  }

  .hud-bottom {
    display: grid;
    grid-template-columns: 76px 1fr;
  }

  .time-slider {
    grid-column: 1 / -1;
    grid-row: 1;
  }

  .speed-control {
    justify-self: end;
  }
}