html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: #050505;
  color: #f0f0f0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
}

#app {
  width: 100%;
  height: 100%;
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
}

#hud {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(6px);
  pointer-events: auto;
  min-width: 220px;
}

#hud .hud-toggle {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 24px;
  height: 24px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.9);
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
}

#hud .hud-toggle:hover {
  background: rgba(255, 255, 255, 0.16);
}

#hud.collapsed {
  min-width: 0;
  width: 36px;
  height: 36px;
  padding: 6px;
}

#hud.collapsed .hud-content {
  display: none;
}

#hud.collapsed .hud-toggle {
  position: static;
  width: 24px;
  height: 24px;
}

#app {
  position: relative;
}

#app:focus {
  outline: none;
}

body:focus-within #hud {
  pointer-events: auto;
}

#hud .title {
  font-weight: 650;
  letter-spacing: 0.3px;
}

#hud .status {
  margin-top: 6px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.8);
}

#hud .row {
  margin-top: 6px;
  display: flex;
  justify-content: space-between;
  font-size: 13px;
}

#hud .controls {
  margin-top: 8px;
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  font-size: 12px;
}

#hud .pill {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.85);
  background: rgba(255, 255, 255, 0.06);
}

#hud .pill.on {
  border-color: rgba(130, 200, 255, 0.45);
  background: rgba(130, 200, 255, 0.12);
}

#hud .hint {
  margin-top: 6px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.7);
}

#hud a {
  color: rgba(130, 200, 255, 0.95);
  text-decoration: none;
}

#hud a:hover {
  text-decoration: underline;
}

#hud .help {
  margin-top: 10px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.7);
}

#zoom {
  width: 100%;
  margin-top: 6px;
}

#mobileControls {
  --pad-size: clamp(120px, 24vw, 190px);
  --pad-thumb: clamp(46px, 10vw, 72px);
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 4;
  display: none;
}

body.touch-input #mobileControls {
  display: block;
}

#mobileControls .pad-group {
  position: absolute;
  bottom: calc(16px + env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: auto;
}

#mobileControls .pad-group.left {
  left: calc(16px + env(safe-area-inset-left));
}

#mobileControls .pad-group.right {
  right: calc(16px + env(safe-area-inset-right));
}

#mobileControls .pad {
  width: var(--pad-size);
  height: var(--pad-size);
  border-radius: 999px;
  position: relative;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.12), rgba(0, 0, 0, 0.4));
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: inset 0 0 24px rgba(0, 0, 0, 0.55), 0 8px 24px rgba(0, 0, 0, 0.35);
}

#mobileControls .pad.active {
  border-color: rgba(130, 200, 255, 0.6);
  box-shadow: inset 0 0 30px rgba(30, 80, 120, 0.55), 0 10px 28px rgba(0, 0, 0, 0.45);
}

#mobileControls .pad-base {
  position: absolute;
  inset: 18%;
  border-radius: 999px;
  border: 1px dashed rgba(255, 255, 255, 0.2);
}

#mobileControls .pad-thumb {
  position: absolute;
  top: 50%;
  left: 50%;
  width: var(--pad-thumb);
  height: var(--pad-thumb);
  border-radius: 999px;
  transform: translate(-50%, -50%);
  background: rgba(130, 200, 255, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.4);
  box-shadow: 0 10px 18px rgba(0, 0, 0, 0.35);
  transition: transform 0.04s linear;
}

#mobileControls .pad-label {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.75);
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

#mobileControls .pad-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

#mobileControls .pad-actions button {
  min-width: 76px;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(0, 0, 0, 0.5);
  color: rgba(255, 255, 255, 0.9);
  font-size: 12px;
  letter-spacing: 0.2px;
  text-transform: uppercase;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

#mobileControls .pad-actions button:active,
#mobileControls .pad-actions button.active {
  border-color: rgba(130, 200, 255, 0.6);
  background: rgba(30, 80, 120, 0.4);
}

@media (max-width: 600px) {
  #mobileControls {
    --pad-size: clamp(110px, 30vw, 170px);
  }
  #mobileControls .pad-actions button {
    min-width: 70px;
    padding: 9px 12px;
  }
}