:root {
  --bg-color: #f0f0f0;
  --text-color: #333;
  --square-bg: white;
  --square-border: black;
  --stats-bg: white;
  --stats-shadow: rgba(0, 0, 0, 0.2);
  --highscore-bg: #f8f9fa;
  --highscore-text: #6c757d;
}

[data-theme='dark'] {
  --bg-color: #1a1a1a;
  --text-color: #f0f0f0;
  --square-bg: #2d2d2d;
  --square-border: #444;
  --stats-bg: #2d2d2d;
  --stats-shadow: rgba(0, 0, 0, 0.4);
  --highscore-bg: #333;
  --highscore-text: #f0f0f0;
  --score-color: #ffffff;
  /* White color for score and time in dark mode */
}

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

body {
  width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 1.5rem;
  background: #f8f9fa;
  font-family:
    -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu,
    Cantarell, sans-serif;
  color: #2c3e50;
  padding: 1rem;
}

.header {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.header h1 {
  font-size: 2rem;
  font-weight: 600;
  color: #2c3e50;
  letter-spacing: -0.5px;
}

.header .icon {
  width: 4.5rem;
  height: 4.5rem;
  margin-right: 0.625rem;
}

[data-theme='light'] .dark-icon,
[data-theme='dark'] .light-icon {
  display: none;
}

[data-theme='light'] .light-icon,
[data-theme='dark'] .dark-icon {
  display: block;
}

/* NEW: Difficulty Selector Styles */
.difficulty-selector {
  text-align: center;
  margin: 0;
  padding: 0;
}

.difficulty-selector label {
  display: block;
  margin-bottom: 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: #6c757d;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.difficulty-btn {
  margin: 0 0.25rem;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid #e0e0e0;
  background: white;
  color: #6c757d;
  border-radius: 0.25rem;
  transition: all 0.2s ease;
}

.difficulty-btn.active {
  background: #2c3e50;
  color: white;
  border-color: #2c3e50;
}

.difficulty-btn:hover:not(.active) {
  background: #f8f9fa;
  border-color: #2c3e50;
  color: #2c3e50;
}

.difficulty-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.stats {
  display: flex;
  flex-direction: row;
  gap: 3rem;
  font-size: 1rem;
  background: white;
  padding: 1.5rem 2.5rem;
  border-radius: 0.5rem;
  border: 1px solid #e0e0e0;
}

.grid {
  margin: 0 auto;
  width: 90vmin;
  height: 90vmin;
  max-width: 350px;
  max-height: 350px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  background: white;
  padding: 0.5rem;
  border-radius: 0.5rem;
  border: 1px solid #e0e0e0;
}

.icon {
  width: 6rem;
  height: 6rem;
}

.square {
  aspect-ratio: 1;
  width: 100%;
  border: 1px solid #e0e0e0;
  border-radius: 0.25rem;
  cursor: pointer;
  transition: all 0.15s ease;
  background: #fafafa;
}

.square:active {
  transform: scale(0.95);
  background: #f0f0f0;
}

.square:hover {
  border-color: #2c3e50;
  background: #f5f5f5;
}

/* Mole appearance animation */
@keyframes moleAppear {
  0% {
    transform: translateY(100%) scale(0.9);
    opacity: 0.7;
  }

  100% {
    transform: translateY(0) scale(1);
    opacity: 1;
  }
}

@keyframes moleDisappear {
  0% {
    transform: translateY(0) scale(1);
    opacity: 1;
  }

  100% {
    transform: translateY(100%) scale(0.8);
    opacity: 0;
  }
}

@keyframes moleHit {
  0% {
    transform: scale(1);
  }

  50% {
    transform: scale(0.9);
    filter: brightness(1.5);
  }

  100% {
    transform: scale(1);
  }
}

.mole {
  background-size: 70%;
  background-repeat: no-repeat;
  background-position: center;
  animation: moleAppear 0.15s cubic-bezier(0.25, 0.1, 0.25, 1.5) forwards;
  will-change: transform, opacity;
  transform-origin: bottom center;
}

.mole.hit {
  animation: moleHit 0.3s ease-out;
}

.mole.hiding {
  animation: moleDisappear 0.2s ease-in forwards;
}

[data-theme='dark'] .mole {
  background-color: var(--square-bg);
  background-image: url('./images/whack-a-mole-white.png');
}

[data-theme='light'] .mole {
  background-color: white;
  background-image: url('./images/whack-a-mole-black.png');
}

/* Add some depth to the mole */
.mole::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 10%;
  right: 10%;
  height: 10px;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 50%;
  filter: blur(4px);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.square:hover .mole::after {
  opacity: 1;
}

.controls {
  margin: 0;
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Theme Toggle Button */
.theme-toggle {
  --size: 44px;
  --icon-size: 20px;
  --toggle-bg: transparent;
  --toggle-border: #e5e7eb;
  /* Light gray border */
  --toggle-color: #000000;
  /* Black for light mode */
  --toggle-color-hover: #6b7280;
  /* Gray-500 */

  position: relative;
  width: var(--size);
  height: var(--size);
  border-radius: 50%;
  background: var(--toggle-bg);
  border: 1px solid var(--toggle-border);
  color: var(--toggle-color);
  cursor: pointer;
  padding: 0.5rem;
  transition: all 0.3s ease;
  margin-left: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  outline: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  -webkit-appearance: none;
  appearance: none;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  -webkit-tap-highlight-color: transparent;
}

/* Remove all default button styling */
.theme-toggle,
.theme-toggle:focus,
.theme-toggle:active,
.theme-toggle:hover {
  -webkit-tap-highlight-color: transparent;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  -webkit-focus-ring-color: transparent;
  outline: none;
  -ms-touch-action: manipulation;
  touch-action: manipulation;
}

/* Custom hover and active states */
.theme-toggle:hover {
  background-color: rgba(0, 0, 0, 0.05);
  color: var(--toggle-color-hover);
}

.theme-toggle:active {
  transform: scale(0.95);
}

/* Dark mode styles */
[data-theme='dark'] .theme-toggle {
  --toggle-color: #ffffff;
  /* White for dark mode */
  --toggle-color-hover: #d1d5db;
  /* Gray-300 */
  --toggle-border: #4b5563;
  /* Gray-600 */
}

[data-theme='dark'] .theme-toggle:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

/* Remove all focus rings and outlines */
.theme-toggle::-moz-focus-inner {
  border: 0;
}

.theme-toggle:focus {
  outline: none !important;
  box-shadow: none !important;
}

/* Ensure no green highlight on mobile */
.theme-toggle::selection {
  background: transparent;
}

.theme-toggle::-moz-selection {
  background: transparent;
}

/* For WebKit browsers */
.theme-toggle {
  -webkit-tap-highlight-color: transparent;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

/* For Firefox */
.theme-toggle::-moz-focus-inner {
  border: 0;
}

/* For Internet Explorer */
.theme-toggle {
  -ms-touch-action: manipulation;
  touch-action: manipulation;
}

/* Sun and Moon Icons */
.theme-toggle svg {
  pointer-events: none;
  /* Prevent any pointer events on the SVG */
  -webkit-tap-highlight-color: transparent !important;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

[data-theme='light'] .sun {
  fill: #000000;
  /* Black sun in light mode */
}

[data-theme='dark'] .moon {
  fill: #ffffff;
  /* White moon in dark mode */
}

/* Completely disable any green highlight */
.theme-toggle * {
  -webkit-tap-highlight-color: transparent !important;
  -webkit-touch-callout: none !important;
  -webkit-user-select: none !important;
  -khtml-user-select: none !important;
  -moz-user-select: none !important;
  -ms-user-select: none !important;
  user-select: none !important;
  outline: none !important;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0) !important;
  -webkit-tap-highlight-color: transparent !important;
}

/* For Chrome/Safari */
@media screen and (-webkit-min-device-pixel-ratio: 0) {
  .theme-toggle {
    -webkit-tap-highlight-color: transparent !important;
  }
}

/* For Firefox */
@-moz-document url-prefix() {
  .theme-toggle {
    -moz-user-focus: ignore;
    -moz-user-select: none;
  }
}

/* For Edge */
@supports (-ms-ime-align: auto) {
  .theme-toggle {
    -ms-touch-action: manipulation;
    touch-action: manipulation;
  }
}

/* Sun beams in light mode */
[data-theme='light'] .sun-beams {
  stroke: #000000;
  /* Black sun beams */
}

/* Moon in light mode (hidden) */
[data-theme='light'] .moon {
  fill: transparent;
}

/* Sun in dark mode (hidden) */
[data-theme='dark'] .sun {
  fill: transparent;
}

/* Sun beams in dark mode (hidden) */
[data-theme='dark'] .sun-beams {
  opacity: 0;
}

/* Sun and Moon */
.sun-and-moon {
  width: 1em;
  height: 1em;
  display: block;
  fill: currentColor;
  transition: transform 0.5s var(--ease-spring-3);
}

.sun {
  fill: currentColor;
  transform-origin: center center;
  transition: transform 0.5s var(--ease-spring-3);
}

[data-theme='dark'] .sun {
  transform: scale(1.5);
  fill: #9ca3af;
  /* Gray-400 */
}

.sun-beams {
  stroke: currentColor;
  stroke-width: 2px;
  stroke-linecap: round;
  transform-origin: center center;
  opacity: 1;
  transition:
    transform 0.5s var(--ease-spring-4),
    opacity 0.2s var(--ease-3);
}

[data-theme='dark'] .sun-beams {
  transform: rotateZ(-25deg);
  opacity: 0;
}

.moon {
  fill: none;
  transform: translateX(0);
  transition: transform 0.25s var(--ease-out-5);
}

[data-theme='dark'] .moon {
  transform: translateX(-7px);
}

[data-theme='dark'] .moon > circle {
  transform: translateX(-7px);
}

@keyframes rotate {
  to {
    transform: rotate(1turn);
  }
}

@keyframes slide {
  0% {
    transform: translateX(0);
  }

  100% {
    transform: translateX(-7px);
  }
}

button:not(.theme-toggle) {
  padding: 0.625rem 1.25rem;
  font-size: 1rem;
  cursor: pointer;
  border-radius: 0.313rem;
  border: none;
  background-color: #4caf50;
  color: white;
  transition: all 0.3s;
}

button:hover:not(:disabled) {
  background-color: #2c3e50;
  color: white;
  border-color: #2c3e50;
}

button:active:not(:disabled) {
  transform: scale(0.98);
}

button:disabled {
  background-color: #f8f9fa;
  color: #adb5bd;
  cursor: not-allowed;
  border-color: #e0e0e0;
}

#start-button {
  background-color: #2c3e50;
  color: white;
  border-color: #2c3e50;
}

#start-button:hover:not(:disabled) {
  background-color: #1a252f;
}

#pause-button {
  color: #6c757d;
}

#pause-button:hover:not(:disabled) {
  background-color: #6c757d;
  color: white;
  border-color: #6c757d;
}

#restart-button {
  color: #6c757d;
}

#restart-button:hover:not(:disabled) {
  background-color: #6c757d;
  color: white;
  border-color: #6c757d;
}

#reset-highscore-button {
  color: #6c757d;
}

#reset-highscore-button:hover:not(:disabled) {
  background-color: #6c757d;
  color: white;
  border-color: #6c757d;
}

.high-score-message {
  display: none;
  font-size: 1rem;
  font-weight: 500;
  color: #2c3e50;
  text-align: center;
  margin: 0;
  padding: 0.75rem 1.5rem;
  background-color: #f8f9fa;
  border: 1px solid #e0e0e0;
  border-radius: 0.25rem;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

#high-score {
  color: #2c3e50;
  font-weight: 600;
  font-size: 1.2em;
}

#final-score {
  font-size: 1.25rem;
  font-weight: 500;
  color: #2c3e50;
  text-align: center;
  margin: 0;
}

#current-difficulty {
  color: #2c3e50;
  font-weight: 500;
}

@media (max-width: 30.313rem) {
  body {
    height: auto;
    font-size: 0.875rem;
    padding: 0.5rem;
    gap: 1rem;
  }

  .header h1 {
    font-size: 1.5rem;
  }

  .header img {
    width: 2.5rem;
    height: 2.5rem;
  }

  .grid {
    width: 85vmin;
    height: 85vmin;
    gap: 0.25rem;
    padding: 0.25rem;
  }

  .difficulty-selector {
    padding: 0;
  }

  .difficulty-btn {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    margin: 0.125rem;
  }

  .controls {
    gap: 0.375rem;
  }

  button {
    padding: 0.5rem 0.875rem;
    font-size: 0.8rem;
  }

  .stats {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
    font-size: 0.9rem;
    padding: 1rem 1.5rem;
  }
}

/* --- ADDITION: screen-reader only class */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.high-score-display .label {
  color: #6c757d;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.high-score-display {
  padding: 1rem 2rem;
  min-width: 180px;
  background: white;
  border-radius: 0.5rem;
  border: 1px solid #e0e0e0;
}

.high-score-display #high-score {
  color: #2c3e50;
  font-weight: 600;
  font-size: 2rem;
  display: flex;
  justify-content: center;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.stat-item b {
  color: #6c757d;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 500;
}

[data-theme='dark'] .stat-item span {
  color: var(--score-color);
  font-weight: bold;
}

.stat-item span {
  font-size: 1.75rem;
  font-weight: 600;
  color: #2c3e50;
}

#final-score {
  padding-bottom: 0;
}

/* --- NEW: Mole Animations --- */

/* Keyframes for the mole appearing */
@keyframes mole-pop {
  from {
    transform: scale(0);
  }
  to {
    transform: scale(1);
  }
}

/* Keyframes for the mole being successfully hit */
@keyframes mole-whack {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(0.8) rotate(10deg);
    opacity: 0.8;
  }
  100% {
    transform: scale(0);
    opacity: 0;
  }
}

/* Apply the pop-up animation when the .mole class is added */
.mole {
  /* This ensures the animation originates from the bottom center */
  transform-origin: bottom center;
  animation: mole-pop 0.2s ease-out;
}

/* This class will be added via JavaScript when a mole is hit */
.mole.whacked {
  animation: mole-whack 0.3s ease-out;
}

/* Make sure your square can contain the animation properly */
.square {
  overflow: hidden;
}