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

html {
  height: 100%;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, #0a0a1a 0%, #1a0a2e 50%, #0d0d1a 100%);
  font-family: 'Rajdhani', sans-serif;
  color: #e0e0ff;
  overflow: hidden;
  padding: 0;
  margin: 0;
}

#game-container {
  position: relative;
  width: min(900px, 100vw, calc(100vh * 9 / 16));
  max-width: 100vw;
  aspect-ratio: 9 / 16;
  max-height: min(100vh, 100dvh);
  height: auto;
  background: #0c0c18;
  border-radius: clamp(0px, 2vw, 12px);
  box-shadow: 0 0 60px rgba(100, 50, 255, 0.2), inset 0 0 120px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

#game-canvas {
  display: block;
  width: 100%;
  height: 100%;
  background: radial-gradient(ellipse at 50% 100%, #1a1530 0%, #0a0820 70%, #050510 100%);
  touch-action: none;
}

/* HUD - top: word blanks centered on screen, Laser path button on left */
#hud {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  padding: clamp(6px, 1.5vw, 12px) clamp(8px, 2vw, 16px);
  display: flex;
  align-items: center;
  background: linear-gradient(180deg, rgba(0,0,0,0.7) 0%, transparent 100%);
  pointer-events: none;
  z-index: 2;
}

#blanks-container {
  position: absolute;
  left: 0;
  right: 0;
  text-align: right;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
}

#mothership-badge.mothership-badge {
  display: none;
  font-family: 'Orbitron', monospace;
  font-size: clamp(0.5rem, 1.5vmin, 0.65rem);
  font-weight: 700;
  letter-spacing: 0.15em;
  color: #ffaa00;
  text-shadow: 0 0 8px rgba(255, 170, 0, 0.6);
}

#mothership-badge.mothership-badge.visible {
  display: block;
}

#hud .laser-path-btn,
#hud .shop-btn {
  position: relative;
  z-index: 1;
  pointer-events: auto;
}

/* On touch: keep top HUD buttons visible and tappable (min touch target 44px) */
body.touch-device #hud .laser-path-btn,
body.touch-device #hud .shop-btn {
  min-width: 44px;
  min-height: 44px;
  font-size: clamp(0.7rem, 2vmin, 0.85rem);
  padding: 8px 10px;
}

.shop-btn {
  font-family: 'Orbitron', monospace;
  font-size: clamp(0.6rem, 1.8vmin, 0.75rem);
  font-weight: 600;
  padding: clamp(4px, 1vmin, 6px) clamp(8px, 2vmin, 12px);
  border: 2px solid #8060e0;
  border-radius: 6px;
  background: rgba(60, 40, 100, 0.7);
  color: #c0a0ff;
  cursor: pointer;
  touch-action: manipulation;
  white-space: nowrap;
  transition: background 0.2s, box-shadow 0.2s;
}

.shop-btn:hover {
  background: rgba(80, 55, 140, 0.9);
  box-shadow: 0 0 12px rgba(120, 80, 200, 0.4);
}

.laser-path-btn {
  font-family: 'Orbitron', monospace;
  font-size: clamp(0.6rem, 1.8vmin, 0.75rem);
  font-weight: 600;
  padding: clamp(4px, 1vmin, 6px) clamp(8px, 2vmin, 12px);
  border: 2px solid #00aa55;
  border-radius: 6px;
  background: rgba(0, 80, 40, 0.6);
  color: #00ff88;
  cursor: pointer;
  pointer-events: auto;
  touch-action: manipulation;
  white-space: nowrap;
  transition: background 0.2s, box-shadow 0.2s;
}

.laser-path-btn:hover {
  background: rgba(0, 100, 50, 0.8);
}

.laser-path-btn.on {
  background: rgba(0, 150, 60, 0.9);
  box-shadow: 0 0 12px rgba(0, 255, 136, 0.4);
  color: #fff;
}

/* HUD - bottom: clearing + energy row, then SCoins row */
#hud-bottom {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: clamp(6px, 1.5vw, 12px) clamp(8px, 2vw, 16px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(4px, 1vmin, 8px);
  background: linear-gradient(0deg, rgba(0,0,0,0.75) 0%, transparent 100%);
  pointer-events: none;
  z-index: 2;
}

/* On touch: lift bottom HUD above mobile controls so SCoins, clearing, energy are visible */
body.touch-device #hud-bottom {
  bottom: calc(clamp(66px, 16vmin, 88px) + 90px);
}

#hud-bottom-row1 {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(16px, 4vw, 32px);
}

#scoins-row {
  display: flex;
  align-items: center;
  justify-content: center;
}

.scoins-label {
  font-family: 'Orbitron', monospace;
  font-size: clamp(0.7rem, 2vmin, 0.9rem);
  font-weight: 700;
}

.rainbow-text {
  background: linear-gradient(90deg, #ff0000, #ff8800, #ffdd00, #00cc00, #0088ff, #8800ff);
  background-size: 200% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: rainbow-shift 4s linear infinite;
}

@keyframes rainbow-shift {
  0% { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}

/* Spaceship Shop overlay */
#shop-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 10;
  pointer-events: none;
}

#shop-overlay.visible {
  display: flex;
  pointer-events: auto;
}

#shop-panel {
  background: linear-gradient(180deg, #1a1530 0%, #0d0a20 100%);
  border: 2px solid #8060e0;
  border-radius: 12px;
  padding: clamp(12px, 3vw, 24px);
  max-width: 95%;
  max-height: 90%;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

#shop-panel h2 {
  font-family: 'Orbitron', monospace;
  font-size: clamp(1rem, 4vmin, 1.5rem);
  color: #c0a0ff;
  margin: 0;
}

.shop-scoins {
  margin: 0;
  font-family: 'Orbitron', monospace;
  font-size: clamp(0.9rem, 2.5vmin, 1.1rem);
}

#shop-ships {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(12px, 3vw, 20px);
}

.shop-ship-card {
  background: rgba(40, 30, 70, 0.8);
  border: 2px solid #5040a0;
  border-radius: 8px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  min-width: 100px;
}

.shop-ship-card.equipped {
  border-color: #00ff88;
  box-shadow: 0 0 12px rgba(0, 255, 136, 0.3);
}

.shop-ship-card img {
  width: 56px;
  height: 48px;
  object-fit: contain;
  display: block;
}

.shop-ship-card .ship-name {
  font-family: 'Orbitron', monospace;
  font-size: clamp(0.6rem, 1.8vmin, 0.75rem);
  color: #e0e0ff;
  text-align: center;
  line-height: 1.2;
}

.shop-ship-card .ship-price {
  font-family: 'Orbitron', monospace;
  font-size: 0.7rem;
  color: #a0a0c0;
}

.shop-ship-card .ship-action {
  font-family: 'Orbitron', monospace;
  font-size: 0.65rem;
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid #8060e0;
  background: rgba(80, 60, 140, 0.6);
  color: #fff;
  cursor: pointer;
  transition: background 0.2s;
}

.shop-ship-card .ship-action:hover:not(:disabled) {
  background: rgba(100, 75, 180, 0.9);
}

.shop-ship-card .ship-action:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.shop-close-btn {
  font-family: 'Orbitron', monospace;
  font-size: 0.9rem;
  padding: 10px 24px;
  background: linear-gradient(180deg, #6040c0 0%, #402080 100%);
  border: 2px solid #8060e0;
  border-radius: 8px;
  color: #fff;
  cursor: pointer;
  transition: transform 0.1s;
}

.shop-close-btn:hover {
  transform: scale(1.05);
}

#blanks {
  font-family: 'Orbitron', monospace;
  font-size: clamp(0.75rem, 3.5vmin, 1.8rem);
  font-weight: 700;
  letter-spacing: 0.2em;
  color: #a0a0ff;
  text-shadow: 0 0 12px rgba(150, 100, 255, 0.5);
}

@media (min-width: 400px) {
  #blanks {
    letter-spacing: 0.35em;
  }
}

#blanks .filled {
  color: #00ffcc;
  text-shadow: 0 0 10px rgba(0, 255, 200, 0.6);
}

#blanks .empty {
  color: #404080;
}

#clearing-container {
  display: flex;
  align-items: center;
  gap: 4px;
}

.clearing-label {
  font-family: 'Orbitron', monospace;
  font-size: clamp(0.5rem, 1.8vmin, 0.65rem);
  letter-spacing: 0.1em;
  color: #c08040;
}

#clearing-count {
  font-family: 'Orbitron', monospace;
  font-size: clamp(0.75rem, 2.2vmin, 1rem);
  font-weight: 700;
  color: #ffaa44;
  min-width: 1.2em;
}

#energy-container {
  display: flex;
  align-items: center;
  gap: clamp(4px, 1vw, 8px);
}

.vial-label {
  font-family: 'Orbitron', monospace;
  font-size: clamp(0.5rem, 1.8vmin, 0.65rem);
  letter-spacing: 0.15em;
  color: #8080c0;
}

#vials {
  display: flex;
  gap: clamp(2px, 0.5vw, 4px);
}

.vial {
  width: clamp(10px, 2.5vmin, 14px);
  height: clamp(14px, 3.5vmin, 20px);
  border: 1px solid #4040a0;
  border-radius: 2px;
  background: #0a0a20;
  transition: background 0.3s, box-shadow 0.3s;
}

.vial.full {
  background: linear-gradient(180deg, #00ff88 0%, #00aa55 100%);
  box-shadow: 0 0 10px rgba(0, 255, 136, 0.5), inset 0 1px 0 rgba(255,255,255,0.3);
}

.vial.empty {
  background: #151530;
  box-shadow: none;
}

/* Hint button - bottom right, once per stage */
#hint-btn {
  display: none;
  position: absolute;
  bottom: clamp(8px, 2vmin, 14px);
  right: clamp(8px, 2vmin, 14px);
  width: clamp(36px, 9vmin, 44px);
  height: clamp(36px, 9vmin, 44px);
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.4);
  background: rgba(60, 40, 120, 0.85);
  color: #c0a0ff;
  font-family: 'Orbitron', monospace;
  font-size: clamp(1.1rem, 4vmin, 1.4rem);
  font-weight: 700;
  cursor: pointer;
  z-index: 5;
  pointer-events: auto;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: transform 0.1s, background 0.2s, opacity 0.2s;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
}

#game-container.playing #hint-btn {
  display: flex;
  align-items: center;
  justify-content: center;
}

#hint-btn:hover:not(:disabled) {
  background: rgba(80, 55, 140, 0.95);
  transform: scale(1.05);
}

#hint-btn:active:not(:disabled) {
  transform: scale(0.98);
}

#hint-btn.used,
#hint-btn:disabled {
  opacity: 0.5;
  cursor: default;
}

/* On touch: ? on its own row above the ← → FIRE CLEAR row; ship sits above both */
body.touch-device #hint-btn {
  bottom: calc(100px + 12vmin + 12px);
  left: auto;
  right: clamp(8px, 2vmin, 14px);
}

/* Overlays */
#overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 3;
}

#overlay .active {
  pointer-events: auto;
}

/* Splash screen - first screen shown */
#splash-screen {
  position: absolute;
  inset: 0;
  background: #0a0a18;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 0;
  pointer-events: auto;
  z-index: 4;
}

#splash-screen.hidden {
  display: none;
}

#splash-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  flex: 1;
  min-height: 0;
}

.splash-continue-btn {
  flex-shrink: 0;
  margin-bottom: clamp(12px, 3vmin, 24px);
  padding: clamp(10px, 2vmin, 14px) clamp(20px, 5vw, 32px);
  font-family: 'Orbitron', monospace;
  font-size: clamp(0.75rem, 2.2vmin, 0.95rem);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: #c0a0ff;
  background: rgba(60, 40, 100, 0.85);
  border: 2px solid #8060e0;
  border-radius: 8px;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: background 0.2s, transform 0.1s;
}

.splash-continue-btn:hover {
  background: rgba(80, 55, 140, 0.95);
  transform: scale(1.02);
}

/* Start screen hidden until splash is dismissed */
#start-screen {
  display: none;
}

#start-screen.visible {
  display: flex;
}

#word-flash {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Orbitron', monospace;
  font-size: clamp(1.25rem, 8vmin, 4rem);
  font-weight: 900;
  letter-spacing: 0.15em;
  color: #fff;
  text-shadow: 0 0 30px rgba(150, 100, 255, 0.8);
  opacity: 0;
  transition: opacity 0.15s;
}

#word-flash.visible {
  opacity: 1;
}

#word-flash.fading {
  transition: opacity 4s ease-out;
  opacity: 0;
}

#message-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  pointer-events: none;
}

#message-overlay.visible {
  display: flex;
  pointer-events: auto;
}

#message-text {
  font-family: 'Orbitron', monospace;
  font-size: clamp(1rem, 4vmin, 1.4rem);
  text-align: center;
  color: #e0e0ff;
  text-shadow: 0 0 20px rgba(150, 100, 255, 0.4);
  padding: 0 1rem;
}

#message-overlay.correct #message-text {
  color: #00ffaa;
  text-shadow: 0 0 24px rgba(0, 255, 170, 0.6);
}

#message-overlay.wrong #message-text {
  color: #ff6688;
  text-shadow: 0 0 24px rgba(255, 100, 136, 0.6);
}

#message-btn {
  font-family: 'Orbitron', monospace;
  font-size: clamp(0.9rem, 2.5vmin, 1rem);
  padding: clamp(10px, 2vmin, 12px) clamp(24px, 6vw, 32px);
  background: linear-gradient(180deg, #6040c0 0%, #402080 100%);
  border: 2px solid #8060e0;
  border-radius: 8px;
  color: #fff;
  cursor: pointer;
  letter-spacing: 0.1em;
  transition: transform 0.15s, box-shadow 0.15s;
}

#message-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 0 20px rgba(100, 50, 255, 0.5);
}

/* Start screen */
#start-screen.visible {
  position: absolute;
  inset: 0;
  background: rgba(5, 5, 20, 0.95);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(16px, 4vmin, 24px);
  padding: clamp(12px, 3vw, 20px);
  pointer-events: auto;
}

#start-screen h1 {
  font-family: 'Orbitron', monospace;
  font-size: clamp(1.5rem, 8vmin, 3rem);
  font-weight: 900;
  letter-spacing: 0.15em;
  background: linear-gradient(180deg, #c0a0ff 0%, #8060e0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: none;
  text-align: center;
}

#start-screen p {
  text-align: center;
  color: #a0a0c0;
  font-size: clamp(0.9rem, 2.5vmin, 1.1rem);
  line-height: 1.6;
  max-width: 90%;
}

#start-screen .touch-only {
  display: none;
}

body.touch-device #start-screen .touch-only {
  display: block;
}

body.touch-device #start-screen .controls-instruction:not(.touch-only) {
  display: none;
}

#start-screen kbd {
  display: inline-block;
  padding: 2px 8px;
  background: #2a2a50;
  border-radius: 4px;
  font-family: 'Orbitron', monospace;
  color: #c0a0ff;
}

#start-btn {
  font-family: 'Orbitron', monospace;
  font-size: clamp(1rem, 3vmin, 1.2rem);
  padding: clamp(12px, 3vmin, 16px) clamp(32px, 8vw, 48px);
  background: linear-gradient(180deg, #00cc88 0%, #008855 100%);
  border: 2px solid #00ffaa;
  border-radius: 8px;
  color: #001a10;
  font-weight: 700;
  letter-spacing: 0.15em;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  min-height: 44px;
}

#start-btn:hover {
  transform: scale(1.08);
  box-shadow: 0 0 30px rgba(0, 255, 170, 0.5);
}

/* Game over */
#game-over-screen {
  position: absolute;
  inset: 0;
  background: rgba(20, 0, 10, 0.95);
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  pointer-events: none;
}

#game-over-screen.visible {
  display: flex;
  pointer-events: auto;
}

#game-over-screen h2 {
  font-family: 'Orbitron', monospace;
  font-size: clamp(1.5rem, 5vmin, 2rem);
  color: #ff6688;
  text-shadow: 0 0 20px rgba(255, 100, 136, 0.6);
}

#game-over-screen p {
  color: #a08090;
  font-size: clamp(0.9rem, 2.5vmin, 1rem);
}

#restart-btn {
  font-family: 'Orbitron', monospace;
  font-size: clamp(0.9rem, 2.5vmin, 1rem);
  padding: clamp(10px, 2vmin, 12px) clamp(24px, 6vw, 32px);
  background: linear-gradient(180deg, #8040a0 0%, #502060 100%);
  border: 2px solid #c080e0;
  border-radius: 8px;
  color: #fff;
  cursor: pointer;
  transition: transform 0.15s;
  min-height: 44px;
}

#restart-btn:hover {
  transform: scale(1.05);
}

/* Mobile / tablet controls - bottom row above the HUD bar (CLEAR + ENERGY) */
#mobile-controls {
  position: absolute;
  bottom: clamp(12px, 3vmin, 20px);
  left: 0;
  right: 0;
  padding: clamp(12px, 3vmin, 24px);
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: clamp(16px, 4vw, 28px);
  pointer-events: none;
  z-index: 4;
}

#mobile-controls .mobile-move,
#mobile-controls .mobile-fire {
  display: flex;
  align-items: stretch;
  gap: clamp(12px, 3vw, 20px);
  pointer-events: auto;
}

#mobile-controls.hidden {
  display: none;
}

body.touch-device #mobile-controls.hidden {
  display: flex;
}

.mobile-btn {
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  font-family: 'Orbitron', monospace;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-radius: 12px;
  cursor: pointer;
  transition: transform 0.08s, background 0.08s, box-shadow 0.08s;
  min-width: 66px;
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(0.9rem, 2.8vmin, 1.15rem);
  font-weight: 700;
  letter-spacing: 0.05em;
  color: #fff;
  background: rgba(40, 30, 80, 0.75);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
}

.mobile-btn:active {
  transform: scale(0.95);
  background: rgba(60, 45, 120, 0.9);
  box-shadow: 0 0 16px rgba(100, 80, 200, 0.4);
}

.mobile-move-btn {
  flex: 1;
  min-width: 84px;
  font-size: clamp(1.5rem, 5vmin, 2.2rem);
  line-height: 1;
}

.mobile-fire-btn {
  background: rgba(0, 80, 120, 0.75);
  border-color: rgba(0, 200, 255, 0.5);
  color: #b0f0ff;
}

.mobile-fire-btn:active {
  background: rgba(0, 120, 180, 0.9);
  box-shadow: 0 0 16px rgba(0, 200, 255, 0.4);
}

.mobile-clear-btn {
  background: rgba(120, 70, 20, 0.75);
  border-color: rgba(255, 180, 80, 0.5);
  color: #ffcc88;
}

.mobile-clear-btn:active {
  background: rgba(160, 100, 30, 0.9);
  box-shadow: 0 0 16px rgba(255, 180, 80, 0.4);
}