* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: #000;
  overflow: hidden;
  font-family: 'Courier New', monospace;
  color: #00cfff;
}

#renderCanvas {
  width: 100vw;
  height: 100vh;
  display: block;
}

/* ── Atmosphere overlays ── */
#scanlines {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px, transparent 3px,
    rgba(0,0,0,0.03) 3px, rgba(0,0,0,0.03) 4px
  );
  pointer-events: none;
  z-index: 5;
}

#fall-flash {
  position: absolute;
  inset: 0;
  background: rgba(255,30,0,0);
  pointer-events: none;
  z-index: 15;
  transition: background 0.1s;
}

/* ── HUD ── */
#hud {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  pointer-events: none;
  z-index: 10;
}

#hud .game-title {
  font-size: 11px;
  letter-spacing: 6px;
  color: #004466;
  margin-bottom: 4px;
}

#hud .level-display {
  font-size: 20px;
  letter-spacing: 4px;
  color: #00cfff;
  text-shadow: 0 0 20px #00cfff88;
}

#hud .level-sub {
  font-size: 10px;
  letter-spacing: 3px;
  color: #006688;
  margin-top: 2px;
}

#hud .fps-counter {
  font-size: 10px;
  letter-spacing: 2px;
  color: #003344;
  margin-top: 8px;
}

/* ── Screens ── */
.screen {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.88);
  z-index: 20;
  gap: 0;
}

.screen.hidden { display: none; }

.screen-title {
  font-size: clamp(32px, 8vw, 64px);
  letter-spacing: 12px;
  color: #00cfff;
  text-shadow: 0 0 40px #00cfff, 0 0 80px #00cfff44;
  margin-bottom: 8px;
}

.screen-sub {
  font-size: 11px;
  letter-spacing: 5px;
  color: #006688;
  margin-bottom: 40px;
}

/* ── Buttons ── */
.btn {
  background: transparent;
  border: 1px solid #00cfff44;
  color: #00cfff;
  font-family: 'Courier New', monospace;
  font-size: 13px;
  letter-spacing: 4px;
  padding: 14px 40px;
  cursor: pointer;
  transition: all 0.2s;
  margin: 6px 0;
  min-width: 220px;
  text-align: center;
}

.btn:hover {
  background: #00cfff11;
  border-color: #00cfff;
  box-shadow: 0 0 20px #00cfff44;
}

.btn.primary {
  border-color: #00cfff;
  box-shadow: 0 0 12px #00cfff33;
}

.btn-small {
  font-size: 11px;
  padding: 10px 28px;
  letter-spacing: 3px;
}

.divider {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, transparent, #00cfff33, transparent);
  margin: 12px 0;
}

/* ── Unlock box ── */
.unlock-box {
  border: 1px solid #00cfff22;
  padding: 40px 48px;
  text-align: center;
  max-width: 420px;
  width: 90%;
}

.unlock-title {
  font-size: 14px;
  letter-spacing: 5px;
  color: #00cfff;
  margin-bottom: 8px;
}

.unlock-desc {
  font-size: 11px;
  letter-spacing: 2px;
  color: #006688;
  line-height: 1.8;
  margin-bottom: 28px;
}

.unlock-price {
  font-size: 28px;
  letter-spacing: 3px;
  color: #00cfff;
  text-shadow: 0 0 20px #00cfff88;
  margin-bottom: 24px;
}

#code-input {
  background: transparent;
  border: 1px solid #00cfff44;
  color: #00cfff;
  font-family: 'Courier New', monospace;
  font-size: 14px;
  letter-spacing: 4px;
  padding: 12px 16px;
  width: 100%;
  text-align: center;
  margin-bottom: 12px;
  outline: none;
}

#code-input:focus { border-color: #00cfff88; }
#code-input::placeholder { color: #004455; letter-spacing: 2px; }

#unlock-msg {
  font-size: 11px;
  letter-spacing: 2px;
  height: 20px;
  margin-top: 8px;
}

.msg-error { color: #ff4444; }
.msg-ok    { color: #00ff88; }

/* ── Win screen ── */
.win-level {
  font-size: 11px;
  letter-spacing: 4px;
  color: #006688;
  margin-bottom: 12px;
}

.win-title {
  font-size: clamp(24px, 6vw, 48px);
  letter-spacing: 8px;
  color: #00cfff;
  text-shadow: 0 0 30px #00cfff;
  margin-bottom: 32px;
}

/* ── Style Lab ── */
.lab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  max-width: 600px;
  width: 90%;
}

.lab-group {
  border: 1px solid #00cfff11;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.lab-label {
  font-size: 10px;
  letter-spacing: 3px;
  color: #006688;
}

.lab-group input[type="range"] {
  width: 100%;
  accent-color: #00cfff;
}

.lab-group select {
  background: transparent;
  border: 1px solid #00cfff44;
  color: #00cfff;
  font-family: 'Courier New', monospace;
  font-size: 12px;
  letter-spacing: 2px;
  padding: 6px 8px;
  cursor: pointer;
  outline: none;
}

.lab-group select option { background: #000; }