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

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: #00ff88;
  color: #0a0a0a;
  padding: 8px 16px;
  z-index: 1000;
  text-decoration: none;
  font-weight: 700;
  border-radius: 0 0 8px 0;
  transition: top 0.3s ease;
}

.skip-link:focus {
  top: 0;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.game-header {
  text-align: center;
  margin-bottom: 15px;
}

.game-subtitle {
  color: #888;
  font-size: clamp(0.8rem, 3vw, 1rem);
  margin-top: 5px;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background:
    radial-gradient(
      ellipse at 20% 20%,
      rgba(0, 229, 255, 0.08) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse at 80% 80%,
      rgba(0, 255, 136, 0.08) 0%,
      transparent 50%
    ),
    linear-gradient(135deg, #0a0a1a 0%, #1a1a2e 50%, #16213e 100%);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  color: #ffffff;
  padding: 20px;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(rgba(0, 229, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  animation: gridMove 20s linear infinite;
  pointer-events: none;
  z-index: -1;
}

@keyframes gridMove {
  0% {
    transform: translate(0, 0);
  }
  100% {
    transform: translate(50px, 50px);
  }
}

.game-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
  width: 100%;
  max-width: 100%;
  padding: 10px;
}

.game-title {
  font-size: clamp(1.4rem, 6vw, 3rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: clamp(1px, 2vw, 4px);
  color: #00e5ff;
  text-shadow:
    0 0 10px #00e5ff,
    0 0 20px #00e5ff,
    0 0 40px #00e5ff,
    0 0 80px #00e5ff;
  animation: glow 2s ease-in-out infinite alternate;
  text-align: center;
}

@keyframes glow {
  from {
    text-shadow:
      0 0 10px #00e5ff,
      0 0 20px #00e5ff,
      0 0 40px #00e5ff;
  }
  to {
    text-shadow:
      0 0 20px #00e5ff,
      0 0 40px #00e5ff,
      0 0 60px #00e5ff,
      0 0 100px #00e5ff;
  }
}

.scoreboard {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
}

.score-box {
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid #00ff88;
  border-radius: 10px;
  padding: 10px 20px;
  text-align: center;
  box-shadow:
    0 0 10px rgba(0, 255, 136, 0.3),
    inset 0 0 10px rgba(0, 255, 136, 0.1);
  min-width: 90px;
}

.score-label {
  display: block;
  font-size: 0.75rem;
  color: #888;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 3px;
}

.score-value {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: #00ff88;
}

.canvas-container {
  position: relative;
  width: 400px;
  height: 400px;
  max-width: 90vmin;
  max-height: 90vmin;
  border: 3px solid #00ff88;
  border-radius: 10px;
  box-shadow:
    0 0 20px rgba(0, 255, 136, 0.5),
    inset 0 0 20px rgba(0, 255, 136, 0.1);
  overflow: hidden;
}

#gameCanvas {
  display: block;
  background: #0d0d0d;
  border-radius: 7px;
}

#gameCanvas.flash {
  animation: canvasFlash 0.15s ease-out;
}

@keyframes canvasFlash {
  0% {
    filter: brightness(1);
  }
  50% {
    filter: brightness(1.5);
  }
  100% {
    filter: brightness(1);
  }
}

.game-over-screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 15px;
  animation: fadeIn 0.3s ease-out;
}

.game-over-screen h2 {
  font-size: 2.2rem;
  color: #ff4444;
  text-shadow:
    0 0 10px #ff4444,
    0 0 20px #ff4444;
}

.game-over-stats {
  background: rgba(255, 255, 255, 0.1);
  padding: 15px 25px;
  border-radius: 10px;
  text-align: center;
}

.game-over-stats p {
  font-size: 1rem;
  color: #cccccc;
  margin: 8px 0;
}

.stat-value {
  color: #00ff88;
  font-weight: 700;
  font-size: 1.2rem;
}

.new-high-score {
  color: #ffff00;
  font-size: 1.3rem;
  font-weight: 700;
  text-shadow: 0 0 10px #ffff00;
  animation: highScorePulse 0.5s ease-in-out infinite alternate;
}

@keyframes highScorePulse {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.1);
  }
}

.restart-hint {
  font-size: 0.85rem;
  color: #666;
  margin-top: 5px;
}

/* Desktop/Mobile specific elements */
.desktop-instruction,
.desktop-tip,
.desktop-hint {
  display: block;
}

.mobile-instruction,
.mobile-tip,
.mobile-hint {
  display: none;
}

/* Show desktop elements by default, mobile on touch devices */
@media (hover: none) and (pointer: coarse) {
  .desktop-instruction,
  .desktop-tip,
  .desktop-hint {
    display: none;
  }

  .mobile-instruction,
  .mobile-tip,
  .mobile-hint {
    display: block;
  }
}

.pause-screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 15px;
  animation: fadeIn 0.3s ease-out;
}

.pause-screen h2 {
  font-size: 2.5rem;
  color: #ffff00;
  text-shadow:
    0 0 10px #ffff00,
    0 0 20px #ffff00;
}

.mobile-resume-btn {
  background: linear-gradient(135deg, #00ff88 0%, #00cc6a 100%);
  color: #0a0a0a;
  border: none;
  padding: 12px 30px;
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 0 20px rgba(0, 255, 136, 0.4);
  margin-top: 15px;
}

.mobile-resume-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(0, 255, 136, 0.6);
}

.mobile-resume-btn:active {
  transform: translateY(0);
}

.desktop-hint {
  font-size: 1.2rem;
  color: #ffffff;
}

@media (hover: none) and (pointer: coarse) {
  .mobile-resume-btn {
    display: inline-block;
  }
}

@media (hover: hover) and (pointer: fine) {
  .mobile-resume-btn {
    display: none !important;
  }
}

@media (max-width: 768px) {
  .desktop-hint {
    display: none;
  }

  .pause-title {
    display: none;
  }

  .pause-screen {
    justify-content: center;
  }

  .desktop-controls-help {
    display: none !important;
  }

  .mobile-controls-help {
    display: block !important;
  }
}

.start-screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.92);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 15px;
  animation: fadeIn 0.3s ease-out;
}

.start-screen h2 {
  font-size: 2rem;
  color: #00ff88;
  text-shadow:
    0 0 10px #00ff88,
    0 0 20px #00ff88;
  margin-bottom: 10px;
}

.start-instruction {
  font-size: 1.1rem;
  color: #ffffff;
  text-align: center;
}

.start-instruction strong {
  color: #ffff00;
}

.start-tip {
  font-size: 0.9rem;
  color: #888;
  text-align: center;
}

.countdown-screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  justify-content: center;
  align-items: center;
}

.countdown-number {
  font-size: 6rem;
  font-weight: 700;
  color: #00ff88;
  text-shadow:
    0 0 20px #00ff88,
    0 0 40px #00ff88;
  animation: countdownPop 1s ease-out;
}

@keyframes countdownPop {
  0% {
    transform: scale(0.5);
    opacity: 0;
  }
  50% {
    transform: scale(1.2);
    opacity: 1;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

.start-btn {
  background: linear-gradient(135deg, #00ff88 0%, #00cc6a 100%);
  color: #0a0a0a;
  border: none;
  padding: 15px 40px;
  font-size: 1.2rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow:
    0 0 20px rgba(0, 255, 136, 0.4),
    0 5px 15px rgba(0, 0, 0, 0.3);
  margin-top: 15px;
}

.start-btn:hover {
  transform: translateY(-3px);
  box-shadow:
    0 0 30px rgba(0, 255, 136, 0.6),
    0 10px 25px rgba(0, 0, 0, 0.4);
}

.start-btn:active {
  transform: translateY(0);
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.hidden {
  display: none !important;
}

.restart-btn {
  background: linear-gradient(135deg, #00ff88 0%, #00cc6a 100%);
  color: #0a0a0a;
  border: none;
  padding: 15px 40px;
  font-size: 1.1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow:
    0 0 20px rgba(0, 255, 136, 0.4),
    0 5px 15px rgba(0, 0, 0, 0.3);
}

.restart-btn:hover {
  transform: translateY(-3px);
  box-shadow:
    0 0 30px rgba(0, 255, 136, 0.6),
    0 10px 25px rgba(0, 0, 0, 0.4);
}

.restart-btn:active {
  transform: translateY(0);
  box-shadow:
    0 0 15px rgba(0, 255, 136, 0.4),
    0 3px 10px rgba(0, 0, 0, 0.3);
}

.instructions {
  font-size: 0.9rem;
  color: #888;
  text-align: center;
  line-height: 1.6;
}

.instructions strong {
  color: #00ff88;
}

/* Mobile controls - hidden by default, shown on touch devices */
.mobile-controls {
  display: none;
  gap: 15px;
  margin-top: 20px;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  padding: 15px;
  background: rgba(0, 0, 0, 0.6);
  border-radius: 15px;
  border: 2px solid rgba(0, 255, 136, 0.3);
  box-shadow: 0 0 20px rgba(0, 255, 136, 0.2);
  z-index: 100;
  width: 100%;
  max-width: 400px;
}

.mobile-controls .game-controls {
  margin-top: 10px;
}

/* Show mobile controls on touch devices */
@media (hover: none) and (pointer: coarse) {
  .mobile-controls {
    display: flex;
  }
}

.dpad-container {
  display: grid;
  grid-template-columns: 50px 50px 50px;
  grid-template-rows: 50px 50px;
  gap: 5px;
}

.dpad-btn {
  width: 50px;
  height: 50px;
  border-radius: 10px;
  border: 2px solid #00ff88;
  background: rgba(0, 255, 136, 0.1);
  color: #00ff88;
  font-size: 1.5rem;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.dpad-btn:active {
  background: rgba(0, 255, 136, 0.4);
  transform: scale(0.95);
}

.dpad-up {
  grid-column: 2;
  grid-row: 1;
}

.dpad-left {
  grid-column: 1;
  grid-row: 2;
}

.dpad-down {
  grid-column: 2;
  grid-row: 2;
}

.dpad-right {
  grid-column: 3;
  grid-row: 2;
}

.game-controls {
  display: flex;
  gap: 10px;
}

.game-control-btn {
  padding: 10px 20px;
  border-radius: 10px;
  border: 2px solid #00ff88;
  background: rgba(0, 255, 136, 0.1);
  color: #00ff88;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.game-control-btn:active {
  background: rgba(0, 255, 136, 0.4);
}

.pause-btn {
  border-color: #ffff00;
  color: #ffff00;
  background: rgba(255, 255, 0, 0.1);
}

.pause-btn:active {
  background: rgba(255, 255, 0, 0.4);
}

@keyframes shake {
  0%,
  100% {
    transform: translate(0, 0);
  }
  10%,
  30%,
  50%,
  70%,
  90% {
    transform: translate(-5px, 0);
  }
  20%,
  40%,
  60%,
  80% {
    transform: translate(5px, 0);
  }
}

.canvas-container.shake {
  animation: shake 0.3s ease-in-out;
}

.particle {
  position: absolute;
  pointer-events: none;
  border-radius: 50%;
  animation: particleFade 0.6s ease-out forwards;
}

@keyframes particleFade {
  0% {
    opacity: 1;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    transform: scale(0);
  }
}

@keyframes foodPulse {
  0%,
  100% {
    transform: scale(1);
    box-shadow: 0 0 10px currentColor;
  }
  50% {
    transform: scale(1.1);
    box-shadow: 0 0 20px currentColor;
  }
}

.volume-control {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}

.volume-control label {
  color: #cccccc;
  font-size: 0.95rem;
  min-width: 60px;
}

.volume-slider {
  flex: 1;
  height: 6px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.2);
  appearance: none;
  cursor: pointer;
}

.volume-slider::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #00ff88;
  cursor: pointer;
  box-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
}

.volume-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #00ff88;
  cursor: pointer;
  border: none;
  box-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
}

.volume-value {
  color: #00ff88;
  font-size: 0.9rem;
  min-width: 35px;
  text-align: right;
}

.achievements-section {
  margin-top: 20px;
}

.achievements-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 10px;
}

.achievement {
  background: rgba(0, 0, 0, 0.3);
  border: 2px solid #333;
  border-radius: 8px;
  padding: 10px;
  text-align: center;
  transition: all 0.3s ease;
  opacity: 0.5;
}

.achievement.unlocked {
  border-color: #00ff88;
  opacity: 1;
  box-shadow: 0 0 10px rgba(0, 255, 136, 0.3);
}

.achievement-icon {
  font-size: 1.5rem;
  margin-bottom: 5px;
}

.achievement-name {
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 600;
}

.achievement-desc {
  color: #888;
  font-size: 0.7rem;
  margin-top: 3px;
}

.stats-section {
  margin-top: 20px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 10px;
}

.stat-item {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(0, 255, 136, 0.3);
  border-radius: 8px;
  padding: 10px;
  text-align: center;
}

.stat-item-label {
  color: #888;
  font-size: 0.75rem;
  text-transform: uppercase;
}

.stat-item-value {
  color: #00ff88;
  font-size: 1.2rem;
  font-weight: 700;
  margin-top: 3px;
}

.special-food {
  animation: foodPulse 0.5s ease-in-out infinite;
}

.golden-food {
  background: radial-gradient(circle, #ffd700 0%, #ff8c00 100%);
  box-shadow: 0 0 15px #ffd700;
}

.freeze-food {
  background: radial-gradient(circle, #00ffff 0%, #0088ff 100%);
  box-shadow: 0 0 15px #00ffff;
}
.powerup-indicator {
  position: absolute;
  top: 10px;
  left: 10px;
  padding: 5px 10px;
  border-radius: 5px;
  font-size: 0.8rem;
  font-weight: bold;
  z-index: 50;
  animation: powerupPulse 0.5s ease-in-out infinite alternate;
}

.powerup-indicator.double-points {
  background: rgba(255, 215, 0, 0.3);
  border: 2px solid #ffd700;
  color: #ffd700;
}

.powerup-indicator.speed-boost {
  background: rgba(255, 0, 255, 0.3);
  border: 2px solid #ff00ff;
  color: #ff00ff;
}

.powerup-indicator.frozen {
  background: rgba(0, 255, 255, 0.3);
  border: 2px solid #00ffff;
  color: #00ffff;
}

@keyframes powerupPulse {
  from {
    opacity: 0.8;
  }
  to {
    opacity: 1;
  }
}

@media (max-width: 768px) {
  .mobile-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .achievements-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .game-title {
    font-size: 2rem;
    letter-spacing: 2px;
  }

  .scoreboard {
    gap: 10px;
  }

  .score-box {
    padding: 8px 12px;
    min-width: 70px;
  }

  .score-value {
    font-size: 1.2rem;
  }

  .score-label {
    font-size: 0.65rem;
  }

  .canvas-container {
    width: 320px;
  }

  #gameCanvas {
    width: 320px;
    height: 320px;
  }

  .restart-btn {
    padding: 12px 30px;
    font-size: 1rem;
  }

  .instructions {
    font-size: 0.8rem;
  }

  .start-screen h2 {
    font-size: 1.6rem;
  }

  .start-instruction {
    font-size: 1rem;
  }

  .dpad-btn {
    width: 45px;
    height: 45px;
    font-size: 1.3rem;
  }

  .dpad-container {
    grid-template-columns: 45px 45px 45px;
    grid-template-rows: 45px 45px;
  }
}

@media (max-width: 360px) {
  .game-title {
    font-size: 1.6rem;
  }

  .canvas-container {
    width: 280px;
  }

  #gameCanvas {
    width: 280px;
    height: 280px;
  }
}

@media (max-width: 360px) {
  .game-title {
    font-size: 1.6rem;
  }

  .canvas-container {
    width: 280px;
  }

  #gameCanvas {
    width: 280px;
    height: 280px;
  }
}

.settings-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid #00ff88;
  background: rgba(0, 0, 0, 0.7);
  color: #00ff88;
  font-size: 1.2rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 10px rgba(0, 255, 136, 0.3);
  z-index: 50;
}

.settings-btn:hover {
  transform: rotate(90deg);
  background: rgba(0, 255, 136, 0.2);
  box-shadow: 0 0 20px rgba(0, 255, 136, 0.5);
}

.settings-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.95);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 100;
  animation: fadeIn 0.3s ease-out;
}

.settings-overlay .settings-content {
  width: 90%;
  max-height: 90%;
  overflow-y: auto;
}

.settings-overlay .settings-content::-webkit-scrollbar {
  width: 6px;
}

.settings-overlay .settings-content::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 3px;
}

.settings-overlay .settings-content::-webkit-scrollbar-thumb {
  background: #00ff88;
  border-radius: 3px;
}

.settings-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  animation: fadeIn 0.3s ease-out;
}

.settings-content {
  background: linear-gradient(145deg, #1a1a2e 0%, #0d0d0d 100%);
  border: 2px solid #00ff88;
  border-radius: 15px;
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 0 30px rgba(0, 255, 136, 0.3);
}

.settings-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  border-bottom: 1px solid rgba(0, 255, 136, 0.3);
}

.settings-header h2 {
  color: #00ff88;
  font-size: 1.5rem;
  text-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
}

.close-settings-btn {
  width: 35px;
  height: 35px;
  border-radius: 50%;
  border: 2px solid #ff4444;
  background: transparent;
  color: #ff4444;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  z-index: 200;
}

.close-settings-btn:hover {
  background: rgba(255, 68, 68, 0.2);
  transform: scale(1.1);
}

.settings-body {
  padding: 20px;
}

.settings-section {
  margin-bottom: 25px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.settings-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.settings-section h3 {
  color: #ffffff;
  font-size: 1.1rem;
  margin-bottom: 15px;
  padding-bottom: 8px;
  border-bottom: 2px solid #00ff88;
  display: inline-block;
}

.setting-item {
  margin-bottom: 15px;
}

.setting-item label {
  color: #cccccc;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.setting-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: #00ff88;
  cursor: pointer;
}

.setting-select {
  width: 100%;
  padding: 10px 15px;
  border: 2px solid #00ff88;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.5);
  color: #ffffff;
  font-size: 1rem;
  cursor: pointer;
  margin-top: 5px;
}

.setting-select:focus {
  outline: none;
  box-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
}

.setting-select option {
  background: #1a1a2e;
  color: #ffffff;
}

.difficulty-info {
  font-size: 0.8rem;
  color: #888;
  margin-top: 8px;
  padding: 8px;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 5px;
}

.reset-btn {
  padding: 10px 20px;
  border: 2px solid #ffaa00;
  border-radius: 8px;
  background: transparent;
  color: #ffaa00;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.3s ease;
}

.reset-btn:hover {
  background: rgba(255, 170, 0, 0.2);
}

.reset-confirm {
  color: #00ff88;
  font-size: 0.85rem;
  margin-left: 10px;
  animation: fadeIn 0.3s ease-out;
}

#soundOptions,
#gameOverSoundOptions {
  margin-left: 28px;
}

#soundOptions.disabled,
#gameOverSoundOptions.disabled {
  opacity: 0.4;
  pointer-events: none;
}

.help-content {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 10px;
  padding: 15px;
}

.help-item {
  margin-bottom: 15px;
}

.help-item:last-child {
  margin-bottom: 0;
}

.help-item strong {
  color: #00ff88;
  display: block;
  margin-bottom: 5px;
}

.help-item p {
  color: #cccccc;
  font-size: 0.9rem;
  line-height: 1.5;
}

.controls-list,
.difficulty-list,
.tips-list {
  list-style: none;
  padding-left: 0;
}

.controls-list li,
.tips-list li {
  color: #cccccc;
  font-size: 0.85rem;
  margin-bottom: 5px;
  padding-left: 15px;
  position: relative;
}

.controls-list li::before,
.tips-list li::before {
  content: "›";
  position: absolute;
  left: 0;
  color: #00ff88;
  font-weight: bold;
}

.difficulty-list li {
  color: #cccccc;
  font-size: 0.85rem;
  margin-bottom: 5px;
}

.diff-easy {
  color: #00ff88;
  font-weight: bold;
}

.diff-medium {
  color: #ffff00;
  font-weight: bold;
}

.diff-hard {
  color: #ff8800;
  font-weight: bold;
}

.diff-expert {
  color: #ff4444;
  font-weight: bold;
}

.settings-footer {
  padding: 20px;
  border-top: 1px solid rgba(0, 255, 136, 0.3);
  text-align: center;
}

.save-settings-btn {
  background: linear-gradient(135deg, #00ff88 0%, #00cc6a 100%);
  color: #0a0a0a;
  border: none;
  padding: 12px 40px;
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 0 20px rgba(0, 255, 136, 0.4);
  position: relative;
  z-index: 200;
}

.save-settings-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(0, 255, 136, 0.6);
}

.settings-content::-webkit-scrollbar {
  width: 8px;
}

.settings-content::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 4px;
}

.settings-content::-webkit-scrollbar-thumb {
  background: #00ff88;
  border-radius: 4px;
}

/* Mobile controls are shown via hover: none media query */
/* Removed conflicting @media (max-width: 850px) rule */

.mobile-pause-btn {
  display: none;
  position: absolute;
  top: 10px;
  left: 10px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid #ffff00;
  background: rgba(0, 0, 0, 0.7);
  color: #ffff00;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 10px rgba(255, 255, 0, 0.3);
  z-index: 50;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.mobile-pause-btn:active {
  transform: scale(0.95);
  background: rgba(255, 255, 0, 0.3);
}

.mobile-pause-btn.hidden {
  display: none !important;
}

@media (hover: none) and (pointer: coarse) {
  .mobile-pause-btn {
    display: flex;
  }
  .mobile-pause-btn.hidden {
    display: none !important;
  }
}

@media (hover: hover) and (pointer: fine) {
  .mobile-pause-btn {
    display: none !important;
  }
}

@media (max-width: 768px) {
  body {
    padding: 10px;
  }

  .game-wrapper {
    padding: 5px;
  }

  .scoreboard {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    width: 100%;
    max-width: 400px;
  }

  .score-box {
    padding: 8px 12px;
    min-width: unset;
  }

  .score-value {
    font-size: 1.3rem;
  }

  .score-label {
    font-size: 0.65rem;
  }

  .canvas-container {
    width: 100%;
    max-width: 400px;
    height: auto;
    aspect-ratio: 1 / 1;
  }

  #gameCanvas {
    width: 100%;
    height: auto;
    aspect-ratio: 1 / 1;
  }

  .settings-btn {
    width: 36px;
    height: 36px;
    font-size: 1rem;
    top: 8px;
    right: 8px;
  }

  .start-screen h2 {
    font-size: 1.8rem;
  }

  .start-instruction {
    font-size: 1rem;
    padding: 0 20px;
  }

  .start-tip {
    font-size: 0.8rem;
  }

  .game-over-screen h2 {
    font-size: 1.8rem;
  }

  .pause-screen h2 {
    font-size: 2rem;
  }

  .countdown-number {
    font-size: 5rem;
  }

  .instructions {
    display: none;
  }

  .settings-overlay {
    padding: 10px;
  }

  .settings-overlay .settings-content {
    width: 100%;
    max-height: 100%;
    border-radius: 10px;
  }

  .settings-body {
    padding: 15px;
  }

  .settings-section {
    margin-bottom: 15px;
    padding-bottom: 15px;
  }

  .settings-section h3 {
    font-size: 1rem;
  }

  .help-content {
    padding: 10px;
  }

  .help-item p,
  .controls-list li,
  .tips-list li,
  .difficulty-list li {
    font-size: 0.8rem;
  }

  .achievements-grid,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .start-btn,
  .restart-btn,
  .save-settings-btn {
    padding: 12px 30px;
    font-size: 1rem;
  }

  .start-btn {
    padding: 10px 25px;
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  body {
    padding: 8px;
  }

  .game-wrapper {
    gap: 10px;
  }

  .game-title {
    font-size: clamp(1.3rem, 6vw, 1.8rem);
  }

  .scoreboard {
    gap: 6px;
    max-width: 320px;
  }

  .score-box {
    padding: 6px 10px;
  }

  .score-value {
    font-size: 1.1rem;
  }

  .score-label {
    font-size: 0.55rem;
  }

  .canvas-container {
    max-width: 320px;
    border-width: 2px;
  }

  .settings-btn {
    width: 32px;
    height: 32px;
    font-size: 0.9rem;
    top: 6px;
    right: 6px;
  }

  .start-screen h2 {
    font-size: 1.5rem;
  }

  .start-instruction {
    font-size: 0.9rem;
  }

  .start-tip {
    font-size: 0.75rem;
  }

  .game-over-screen h2 {
    font-size: 1.5rem;
  }

  .game-over-stats {
    padding: 10px 15px;
  }

  .game-over-stats p {
    font-size: 0.9rem;
    margin: 5px 0;
  }

  .stat-value {
    font-size: 1rem;
  }

  .pause-screen h2 {
    font-size: 1.6rem;
  }

  .pause-screen p {
    font-size: 1rem;
  }

  .countdown-number {
    font-size: 4rem;
  }

  .dpad-container {
    grid-template-columns: 55px 55px 55px;
    grid-template-rows: 55px 55px;
    gap: 6px;
  }

  .dpad-btn {
    width: 55px;
    height: 55px;
    font-size: 1.4rem;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
  }

  .game-controls {
    margin-top: 8px;
  }

  .game-control-btn {
    padding: 12px 20px;
    font-size: 0.9rem;
  }

  .start-btn,
  .restart-btn,
  .save-settings-btn {
    padding: 10px 25px;
    font-size: 0.9rem;
    border-radius: 30px;
  }

  .restart-hint {
    font-size: 0.75rem;
  }

  .settings-header {
    padding: 15px;
  }

  .settings-header h2 {
    font-size: 1.2rem;
  }

  .close-settings-btn {
    width: 30px;
    height: 30px;
    font-size: 0.9rem;
  }

  .setting-select {
    padding: 8px 12px;
    font-size: 0.9rem;
  }

  .setting-item label {
    font-size: 0.85rem;
  }

  .volume-control label {
    font-size: 0.85rem;
    min-width: 50px;
  }

  .reset-btn {
    padding: 8px 15px;
    font-size: 0.8rem;
  }
}

@media (max-width: 360px) {
  body {
    padding: 5px;
  }

  .game-title {
    font-size: clamp(1.1rem, 6vw, 1.4rem);
    letter-spacing: 1px;
  }

  .scoreboard {
    gap: 5px;
    max-width: 280px;
  }

  .score-box {
    padding: 5px 8px;
  }

  .score-value {
    font-size: 1rem;
  }

  .score-label {
    font-size: 0.5rem;
  }

  .canvas-container {
    max-width: 280px;
    border-width: 2px;
  }

  .settings-btn {
    width: 28px;
    height: 28px;
    font-size: 0.8rem;
    top: 5px;
    right: 5px;
  }

  .start-screen h2 {
    font-size: 1.3rem;
  }

  .start-instruction {
    font-size: 0.85rem;
    padding: 0 15px;
  }

  .start-tip {
    font-size: 0.7rem;
  }

  .game-over-screen h2 {
    font-size: 1.3rem;
  }

  .game-over-stats {
    padding: 8px 12px;
  }

  .game-over-stats p {
    font-size: 0.85rem;
  }

  .stat-value {
    font-size: 0.95rem;
  }

  .new-high-score {
    font-size: 1rem;
  }

  .pause-screen h2 {
    font-size: 1.4rem;
  }

  .pause-screen p {
    font-size: 0.9rem;
  }

  .countdown-number {
    font-size: 3.5rem;
  }

  .dpad-container {
    grid-template-columns: 50px 50px 50px;
    grid-template-rows: 50px 50px;
    gap: 5px;
  }

  .dpad-btn {
    width: 50px;
    height: 50px;
    font-size: 1.2rem;
  }

  .game-control-btn {
    padding: 10px 16px;
    font-size: 0.85rem;
  }

  .start-btn,
  .restart-btn,
  .save-settings-btn {
    padding: 8px 20px;
    font-size: 0.85rem;
  }

  .settings-header {
    padding: 12px;
  }

  .settings-header h2 {
    font-size: 1.1rem;
  }

  .settings-body {
    padding: 12px;
  }

  .settings-section h3 {
    font-size: 0.95rem;
    margin-bottom: 10px;
  }

  .setting-item {
    margin-bottom: 10px;
  }

  .setting-item label {
    font-size: 0.8rem;
  }

  .difficulty-info {
    font-size: 0.7rem;
    padding: 6px;
  }

  .help-content {
    padding: 8px;
  }

  .help-item {
    margin-bottom: 10px;
  }

  .help-item strong {
    font-size: 0.85rem;
  }

  .help-item p,
  .controls-list li,
  .tips-list li,
  .difficulty-list li {
    font-size: 0.75rem;
  }
}

@media (max-width: 320px) {
  .scoreboard {
    max-width: 240px;
  }

  .score-value {
    font-size: 0.9rem;
  }

  .canvas-container {
    max-width: 240px;
  }

  .dpad-container {
    grid-template-columns: 45px 45px 45px;
    grid-template-rows: 45px 45px;
  }

  .dpad-btn {
    width: 45px;
    height: 45px;
    font-size: 1.1rem;
  }

  .game-control-btn {
    padding: 8px 12px;
    font-size: 0.8rem;
  }
}

@media (max-height: 500px) and (orientation: landscape) {
  .game-wrapper {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
  }

  .game-title {
    width: 100%;
    font-size: 1.5rem;
  }

  .scoreboard {
    flex-direction: column;
    width: auto;
  }

  .canvas-container {
    max-width: 45vh;
    max-height: 45vh;
  }

  .mobile-controls {
    flex-direction: row;
    gap: 15px;
  }

  .dpad-container {
    grid-template-columns: 40px 40px 40px;
    grid-template-rows: 40px 40px;
  }

  .dpad-btn {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }

  .game-controls {
    margin-top: 0;
  }
}

@media (hover: none) and (pointer: coarse) {
  .dpad-btn,
  .game-control-btn,
  .start-btn,
  .restart-btn,
  .settings-btn,
  .close-settings-btn,
  .save-settings-btn {
    min-height: 44px;
    min-width: 44px;
  }
  .start-btn:hover,
  .restart-btn:hover,
  .save-settings-btn:hover {
    transform: none;
  }

  .dpad-btn:active,
  .game-control-btn:active,
  .start-btn:active,
  .restart-btn:active {
    transform: scale(0.95);
  }
}

@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  #gameCanvas {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
  }
}

.toast-container {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  background: linear-gradient(
    135deg,
    rgba(26, 26, 46, 0.95) 0%,
    rgba(13, 13, 13, 0.95) 100%
  );
  border: 2px solid #00ff88;
  border-radius: 10px;
  padding: 12px 20px;
  color: #ffffff;
  font-size: 0.9rem;
  box-shadow: 0 0 20px rgba(0, 255, 136, 0.4);
  animation: toastSlideIn 0.3s ease-out;
  display: flex;
  align-items: center;
  gap: 10px;
}

.toast.achievement {
  border-color: #ffd700;
  box-shadow: 0 0 20px rgba(255, 215, 0, 0.4);
}

.toast-icon {
  font-size: 1.2rem;
}

.toast-message {
  flex: 1;
}

@keyframes toastSlideIn {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes toastSlideOut {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(-20px);
  }
}

.toast.hiding {
  animation: toastSlideOut 0.3s ease-in forwards;
}

.score-box {
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid #00ff88;
  border-radius: 10px;
  padding: 10px 20px;
  text-align: center;
  box-shadow:
    0 0 10px rgba(0, 255, 136, 0.3),
    inset 0 0 10px rgba(0, 255, 136, 0.1);
  min-width: 90px;
  transition: all 0.3s ease;
}

.score-box:hover {
  transform: translateY(-2px);
  box-shadow:
    0 0 15px rgba(0, 255, 136, 0.5),
    inset 0 0 15px rgba(0, 255, 136, 0.2);
}

.score-box.score-updated {
  animation: scorePulse 0.3s ease-out;
}

@keyframes scorePulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
    box-shadow:
      0 0 25px rgba(0, 255, 136, 0.8),
      inset 0 0 20px rgba(0, 255, 136, 0.3);
  }
  100% {
    transform: scale(1);
  }
}

.start-btn,
.restart-btn,
.save-settings-btn {
  position: relative;
  overflow: hidden;
}

.start-btn::before,
.restart-btn::before,
.save-settings-btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transition: left 0.5s ease;
}

.start-btn:hover::before,
.restart-btn:hover::before,
.save-settings-btn:hover::before {
  left: 100%;
}

.orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: -1;
  animation: orbFloat 20s ease-in-out infinite;
}

.orb-1 {
  width: 400px;
  height: 400px;
  background: rgba(0, 229, 255, 0.1);
  top: -100px;
  left: -100px;
}

.orb-2 {
  width: 500px;
  height: 500px;
  background: rgba(0, 255, 136, 0.08);
  bottom: -150px;
  right: -150px;
  animation-delay: -10s;
}

.orb-3 {
  width: 300px;
  height: 300px;
  background: rgba(255, 215, 0, 0.05);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: orbPulse 15s ease-in-out infinite;
}

@keyframes orbFloat {
  0%,
  100% {
    transform: translate(0, 0);
  }
  25% {
    transform: translate(30px, -30px);
  }
  50% {
    transform: translate(-20px, 20px);
  }
  75% {
    transform: translate(-30px, -20px);
  }
}

@keyframes orbPulse {
  0%,
  100% {
    opacity: 0.5;
    transform: translate(-50%, -50%) scale(1);
  }
  50% {
    opacity: 0.8;
    transform: translate(-50%, -50%) scale(1.2);
  }
}
.canvas-container {
  position: relative;
  width: 400px;
  height: 400px;
  max-width: 90vmin;
  max-height: 90vmin;
  border: 3px solid #00ff88;
  border-radius: 10px;
  box-shadow:
    0 0 20px rgba(0, 255, 136, 0.5),
    inset 0 0 20px rgba(0, 255, 136, 0.1);
  overflow: hidden;
  transition: all 0.3s ease;
}

.canvas-container:hover {
  box-shadow:
    0 0 30px rgba(0, 255, 136, 0.7),
    inset 0 0 30px rgba(0, 255, 136, 0.15);
}

.canvas-container::before {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(45deg, #00e5ff, #00ff88, #00e5ff);
  border-radius: 12px;
  z-index: -1;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.canvas-container:hover::before {
  opacity: 0.5;
}

.level-up-notification {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 2.5rem;
  font-weight: 700;
  color: #ffd700;
  text-shadow:
    0 0 10px #ffd700,
    0 0 20px #ffd700,
    0 0 40px #ffa500;
  animation: levelUpPop 1s ease-out forwards;
  z-index: 50;
  pointer-events: none;
}

@keyframes levelUpPop {
  0% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.5);
  }
  30% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.2);
  }
  70% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
  100% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(1.5);
  }
}

.game-preview {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  animation: previewFloat 3s ease-in-out infinite;
}

@keyframes previewFloat {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-3px);
  }
}

@keyframes foodBounce {
  0%,
  100% {
    transform: scale(1) translateY(0);
  }
  50% {
    transform: scale(1.15) translateY(-3px);
  }
}

@keyframes foodGlow {
  0%,
  100% {
    filter: brightness(1) drop-shadow(0 0 5px currentColor);
  }
  50% {
    filter: brightness(1.3) drop-shadow(0 0 15px currentColor);
  }
}

@keyframes foodWobble {
  0%,
  100% {
    transform: rotate(0deg) scale(1);
  }
  25% {
    transform: rotate(-10deg) scale(1.1);
  }
  75% {
    transform: rotate(10deg) scale(1.1);
  }
}

@keyframes goldenPulse {
  0%,
  100% {
    transform: scale(1);
    filter: brightness(1) drop-shadow(0 0 10px #ffd700);
  }
  50% {
    transform: scale(1.2);
    filter: brightness(1.5) drop-shadow(0 0 25px #ffd700);
  }
}

@keyframes freezePulse {
  0%,
  100% {
    transform: scale(1);
    filter: brightness(1) drop-shadow(0 0 10px #00ffff);
  }
  50% {
    transform: scale(1.2);
    filter: brightness(1.5) drop-shadow(0 0 25px #00ffff);
  }
}
@keyframes snakeBreath {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.02);
  }
}

@keyframes snakeSegmentFade {
  0% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.8;
    transform: scale(1.1);
  }
  100% {
    opacity: 0;
    transform: scale(0);
  }
}

@keyframes slideInFromTop {
  from {
    opacity: 0;
    transform: translateY(-100%);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInFromBottom {
  from {
    opacity: 0;
    transform: translateY(100%);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInFromLeft {
  from {
    opacity: 0;
    transform: translateX(-100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInFromRight {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes zoomIn {
  from {
    opacity: 0;
    transform: scale(0.5);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes zoomOut {
  from {
    opacity: 1;
    transform: scale(1);
  }
  to {
    opacity: 0;
    transform: scale(0.5);
  }
}

.start-screen {
  animation:
    fadeIn 0.3s ease-out,
    slideInFromTop 0.4s ease-out;
}

.game-over-screen {
  animation:
    fadeIn 0.3s ease-out,
    zoomIn 0.4s ease-out;
}

.pause-screen {
  animation:
    fadeIn 0.3s ease-out,
    zoomIn 0.3s ease-out;
}

.countdown-screen {
  animation: fadeIn 0.2s ease-out;
}

.score-value.rolling {
  animation: scoreRoll 0.3s ease-out;
}

@keyframes scoreRoll {
  0% {
    transform: translateY(-10px);
    opacity: 0;
  }
  50% {
    transform: translateY(5px);
  }
  100% {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes intenseShake {
  0%,
  100% {
    transform: translate(0, 0) rotate(0deg);
  }
  10% {
    transform: translate(-8px, -4px) rotate(-1deg);
  }
  20% {
    transform: translate(8px, 4px) rotate(1deg);
  }
  30% {
    transform: translate(-6px, 2px) rotate(-0.5deg);
  }
  40% {
    transform: translate(6px, -2px) rotate(0.5deg);
  }
  50% {
    transform: translate(-4px, 4px) rotate(-0.3deg);
  }
  60% {
    transform: translate(4px, -4px) rotate(0.3deg);
  }
  70% {
    transform: translate(-2px, 2px) rotate(-0.2deg);
  }
  80% {
    transform: translate(2px, -2px) rotate(0.2deg);
  }
  90% {
    transform: translate(-1px, 1px) rotate(-0.1deg);
  }
}

.canvas-container.shake-intense {
  animation: intenseShake 0.5s ease-in-out;
}

.death-particle {
  position: absolute;
  pointer-events: none;
  border-radius: 50%;
  animation: deathExplosion 0.8s ease-out forwards;
}

@keyframes deathExplosion {
  0% {
    opacity: 1;
    transform: scale(1) translate(0, 0);
  }
  100% {
    opacity: 0;
    transform: scale(0) translate(var(--tx), var(--ty));
  }
}

@keyframes gridPulse {
  0%,
  100% {
    opacity: 0.05;
  }
  50% {
    opacity: 0.15;
  }
}

.grid-pulse {
  animation: gridPulse 3s ease-in-out infinite;
}
.level-progress-container {
  width: 100%;
  max-width: 400px;
  margin-top: 10px;
}

.level-progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid rgba(0, 255, 136, 0.3);
}

.level-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #00ff88, #00e5ff);
  border-radius: 4px;
  transition: width 0.3s ease-out;
  box-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
}

.level-progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: #888;
  margin-top: 5px;
}

.combo-indicator {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 1.5rem;
  font-weight: 700;
  color: #ffd700;
  text-shadow: 0 0 10px #ffd700;
  animation: comboPop 0.5s ease-out forwards;
  pointer-events: none;
  z-index: 60;
}

@keyframes comboPop {
  0% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.5);
  }
  30% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.3);
  }
  100% {
    opacity: 0;
    transform: translate(-50%, -70%) scale(1);
  }
}
.powerup-active {
  position: absolute;
  top: 10px;
  right: 60px;
  padding: 8px 15px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 700;
  z-index: 50;
  animation: powerupSlideIn 0.3s ease-out;
}

.powerup-active.golden {
  background: linear-gradient(135deg, #ffd700, #ff8c00);
  color: #000;
  box-shadow: 0 0 20px rgba(255, 215, 0, 0.6);
}

.powerup-active.freeze {
  background: linear-gradient(135deg, #00ffff, #0088ff);
  color: #000;
  box-shadow: 0 0 20px rgba(0, 255, 255, 0.6);
}

.powerup-active.double-points {
  background: linear-gradient(135deg, #ff00ff, #ff0080);
  color: #fff;
  box-shadow: 0 0 20px rgba(255, 0, 255, 0.6);
}

@keyframes powerupSlideIn {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes powerupSlideOut {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(50px);
  }
}

.powerup-active.expiring {
  animation:
    powerupPulse 0.3s ease-in-out infinite,
    powerupSlideOut 0.5s ease-in forwards;
}
.food-trail {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #ff4757;
  opacity: 0;
  pointer-events: none;
  animation: foodTrail 0.4s ease-out forwards;
}

@keyframes foodTrail {
  0% {
    opacity: 0.8;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    transform: scale(0.3);
  }
}

/* ========================================
   Game Speed Indicator
   ======================================== */

.speed-indicator {
  position: absolute;
  bottom: 10px;
  left: 10px;
  font-size: 0.75rem;
  color: #00e5ff;
  background: rgba(0, 0, 0, 0.5);
  padding: 3px 8px;
  border-radius: 10px;
  border: 1px solid rgba(0, 229, 255, 0.3);
}

.snake-segment {
  transition: all 0.08s linear;
}

.snake-head {
  transition: transform 0.08s linear;
}

.seo-content {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.game-footer {
  text-align: center;
  margin-top: 30px;
  padding: 20px;
  color: #666;
  font-size: 0.85rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.game-footer p {
  margin: 5px 0;
}