:root {
  --bg: #070b14;
  --panel: rgba(10, 17, 31, 0.72);
  --panel-border: rgba(131, 159, 220, 0.4);
  --text: #e8eefc;
  --muted: #a7badf;
  --accent: #5de4c7;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  background: radial-gradient(circle at 20% 0%, #0f1b36 0%, var(--bg) 45%, #03050a 100%);
  color: var(--text);
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  overflow: hidden;
}

#glcanvas {
  width: 100vw;
  height: 100vh;
  display: block;
  cursor: grab;
}

#glcanvas.dragging {
  cursor: grabbing;
}

.hud {
  position: fixed;
  top: 14px;
  left: 14px;
  width: min(350px, calc(100vw - 28px));
  max-height: calc(100vh - 28px);
  overflow-y: auto;
  padding: 14px 14px 10px;
  border-radius: 14px;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  backdrop-filter: blur(12px);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.35);
}

.title {
  margin-bottom: 10px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.row {
  display: grid;
  grid-template-columns: 1fr 1.3fr auto;
  gap: 8px;
  align-items: center;
  margin-bottom: 8px;
  font-size: 13px;
}

.row.compact {
  display: block;
  margin-top: 10px;
}

label {
  color: var(--muted);
}

input,
select,
button {
  width: 100%;
  min-height: 30px;
  border: 1px solid rgba(145, 175, 239, 0.5);
  border-radius: 8px;
  background: rgba(9, 14, 26, 0.75);
  color: var(--text);
  font-size: 13px;
  padding: 4px 8px;
}

button {
  background: linear-gradient(135deg, #1d6cbb 0%, #1f9b8b 100%);
  border: none;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.stats,
.help {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.4;
  margin-top: 6px;
}

@media (max-width: 640px) {
  .row {
    grid-template-columns: 1fr;
  }
}