:root {
  color-scheme: light;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  min-height: 100vh;
  background: #0f172a;
  font-family: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  color: #e2e8f0;
}
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 36px;
  display: flex;
  align-items: center;
  padding: 0 16px;
  background: rgba(15, 23, 42, 0.85);
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
  backdrop-filter: blur(8px);
  font-size: 0.85rem;
  z-index: 10;
}
header a {
  color: #cbd5f5;
  text-decoration: none;
}
header a:hover {
  color: #38bdf8;
}
.grid {
  width: 100vw;
  height: 100vh;
  display: grid;
  grid-template-columns: repeat(var(--cols), minmax(0, 1fr));
  grid-auto-rows: 1fr;
  gap: 2px;
  padding: 2px;
}
.hud {
  position: fixed;
  top: 52px;
  left: 16px;
  z-index: 20;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(148, 163, 184, 0.2);
  padding: 0.5rem 0.6rem 0.7rem;
  border-radius: 12px;
  font-size: 0.95rem;
  display: grid;
  gap: 0.5rem;
  max-width: 240px;
  overflow: hidden;
}
.hud-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  background: rgba(15, 23, 42, 0.9);
  margin: -0.5rem -0.6rem 0;
  padding: 0.25rem 0.4rem;
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 10px;
}
.hud-title {
  font-weight: 600;
  font-size: 0.75rem;
  color: #e2e8f0;
}
.hud-toggle {
  border: 1px solid rgba(148, 163, 184, 0.3);
  background: rgba(15, 23, 42, 0.6);
  color: #cbd5f5;
  border-radius: 8px;
  width: 24px;
  height: 24px;
  font-size: 0.8rem;
  cursor: pointer;
}
.hud.collapsed {
  padding: 0;
  gap: 0;
}
.hud.collapsed label,
.hud.collapsed #hud {
  display: none;
}
.hud.collapsed .hud-title {
  display: none;
}
.hud.collapsed .hud-header {
  margin: 0;
  border-bottom: none;
  border-radius: 12px;
  padding: 0.2rem;
}
.hud label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.85rem;
  color: #cbd5f5;
}
.hud label.hud-toggle-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: #cbd5f5;
}
.hud-toggle-row input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: #38bdf8;
}
.hud #hud {
  white-space: pre-line;
  line-height: 1.4;
}
.hud input[type="range"] {
  width: 200px;
}
.hud-button {
  border: 1px solid rgba(148, 163, 184, 0.3);
  background: rgba(15, 23, 42, 0.6);
  color: #cbd5f5;
  border-radius: 8px;
  padding: 0.35rem 0.6rem;
  font-size: 0.8rem;
  cursor: pointer;
}