:root {
  color-scheme: dark;
  --panel-bg: rgba(7, 12, 25, 0.84);
  --panel-border: rgba(148, 163, 184, 0.22);
  --panel-text: #ecf4ff;
  --panel-muted: #9cb2cf;
  --accent: #66d9ff;
  --accent-soft: rgba(102, 217, 255, 0.18);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  overflow: hidden;
  overscroll-behavior: none;
  background:
    radial-gradient(circle at top, rgba(38, 67, 128, 0.28), transparent 35%),
    radial-gradient(circle at 20% 20%, rgba(255, 214, 102, 0.1), transparent 25%),
    #02040a;
  color: var(--panel-text);
  font-family: system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
}

canvas {
  display: block;
}

#app-ui {
  position: fixed;
  inset: 0;
  pointer-events: none;
}

.panel {
  position: absolute;
  pointer-events: auto;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 18px;
  backdrop-filter: blur(14px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.26);
}

#info-panel {
  top: 18px;
  left: 18px;
  width: min(410px, calc(100vw - 36px));
  max-height: calc(100vh - 36px);
  overflow: auto;
  padding: 16px 16px 18px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

#info-panel.collapsed {
  transform: translateX(calc(-100% - 18px));
  opacity: 0;
  pointer-events: none;
}

#info-panel h1 {
  margin: 0 0 8px;
  font-size: 1.45rem;
  letter-spacing: 0.02em;
}

#info-panel p,
#hud-panel p {
  margin: 0;
  color: var(--panel-muted);
  line-height: 1.5;
  font-size: 0.93rem;
}

.panel-section {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid rgba(148, 163, 184, 0.15);
}

.panel-title {
  margin: 0 0 10px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.control-row {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

button,
select,
input[type="range"] {
  pointer-events: auto;
}

button,
select {
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  background: rgba(14, 24, 42, 0.95);
  color: var(--panel-text);
  padding: 0.65rem 0.9rem;
  font: inherit;
}

button {
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease;
}

button:hover {
  background: rgba(24, 39, 64, 0.98);
  border-color: rgba(102, 217, 255, 0.44);
  transform: translateY(-1px);
}

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

.mini-button {
  min-width: 46px;
  text-align: center;
  font-weight: 700;
}

select,
input[type="range"] {
  width: 100%;
}

input[type="range"] {
  accent-color: var(--accent);
}

.fact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.fact-card {
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(13, 21, 38, 0.82);
  border: 1px solid rgba(148, 163, 184, 0.14);
}

.fact-card strong,
.detail-list dt {
  display: block;
  color: #dbeafe;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}

.fact-card span,
.detail-list dd {
  color: var(--panel-text);
  font-size: 0.9rem;
  line-height: 1.4;
  margin: 0;
}

details {
  margin-top: 12px;
  border-radius: 14px;
  border: 1px solid rgba(148, 163, 184, 0.16);
  background: rgba(13, 21, 38, 0.55);
  overflow: hidden;
}

summary {
  cursor: pointer;
  padding: 12px 14px;
  font-weight: 600;
  color: #dbeafe;
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

#panel-toggle {
  display: block;
  width: 100%;
  margin-top: 16px;
  font-weight: 600;
}

#panel-show {
  position: absolute;
  top: 18px;
  left: 18px;
  z-index: 3;
  display: none;
  min-width: 0;
  padding: 0.7rem 0.9rem;
  font-weight: 600;
}

.detail-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding: 0 14px 14px;
}

#hud-panel {
  right: 18px;
  bottom: 18px;
  width: min(360px, calc(100vw - 36px));
  padding: 14px 16px;
}

#label-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.body-label {
  position: absolute;
  transform: translate(-50%, -50%);
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(4, 10, 22, 0.82);
  border: 1px solid rgba(148, 163, 184, 0.2);
  color: #eef7ff;
  font-size: 0.72rem;
  white-space: nowrap;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.22);
}

.legend-dot {
  display: inline-block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  margin-right: 8px;
  background: var(--accent);
}

.seo-note {
  color: #dbeafe;
  font-size: 0.88rem;
}

@media (max-width: 720px) {
  #info-panel,
  #hud-panel {
    width: calc(100vw - 24px);
  }

  #panel-show {
    top: 12px;
    left: 12px;
  }

  #info-panel {
    top: auto;
    left: 12px;
    right: 12px;
    bottom: 12px;
    max-height: 44vh;
    padding: 14px 14px 16px;
  }

  #info-panel.collapsed {
    transform: translateY(calc(100% + 12px));
  }

  #info-panel h1 {
    font-size: 1.15rem;
  }

  #info-panel > p:first-of-type {
    font-size: 0.86rem;
  }

  #hud-panel {
    right: 12px;
    top: 12px;
    bottom: auto;
    padding: 10px 12px;
  }

  #hud-panel p {
    font-size: 0.84rem;
  }

  .panel-section {
    margin-top: 10px;
    padding-top: 10px;
  }

  .control-row {
    gap: 8px;
    margin-bottom: 8px;
  }

  .fact-grid {
    grid-template-columns: 1fr;
  }

  .body-label {
    font-size: 0.66rem;
    padding: 2px 6px;
  }
}

@media (max-width: 480px) {
  #info-panel {
    max-height: 40vh;
  }

  button,
  select {
    padding: 0.58rem 0.78rem;
  }
}