:root {
  --primary-color: #00ff9d;
  --background-color: #0a0a2a;
  --text-color: #ffffff;
}

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

body {
  font-family: 'Arial', sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  overflow: hidden;
}

.screen {
  display: none;
  position: fixed;
  width: 100vw;
  height: 100vh;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  top: 0;
  left: 0;
  z-index: 3;
}

.screen.active {
  display: flex;
}

#intro-screen {
  background-color: #000;
  color: #0f0;
  font-family: 'Courier New', monospace;
}

#ascii-container {
  white-space: pre;
  font-size: 10px;
  line-height: 1;
  text-align: center;
  position: absolute;
  transform: scale(0.1);
  opacity: 0;
  transition: all 5s ease-in-out;
  text-shadow: 0 0 10px currentColor;
  animation: colorCycle 10s infinite;
}

@keyframes colorCycle {
  0% { text-shadow: 0 0 10px #ff0000; }
  33% { text-shadow: 0 0 10px #ffff00; }
  66% { text-shadow: 0 0 10px #ff00ff; }
  100% { text-shadow: 0 0 10px #ff0000; }
}

#enter-game {
  position: absolute;
  bottom: 20px;
  font-size: 18px;
  padding: 10px 20px;
  background-color: #ff0000;
  color: #000;
  border: 2px solid #ffff00;
  cursor: pointer;
  display: none;
  z-index: 10;
  font-family: 'Courier New', monospace;
  text-transform: uppercase;
  letter-spacing: 2px;
  animation: buttonGlow 2s infinite alternate;
}

@keyframes buttonGlow {
  0% { 
    box-shadow: 0 0 10px #ff0000;
    border-color: #ff0000;
  }
  50% { 
    box-shadow: 0 0 20px #ffff00;
    border-color: #ffff00;
  }
  100% { 
    box-shadow: 0 0 30px #ff00ff;
    border-color: #ff00ff;
  }
}

#enter-game:hover {
  background-color: #ff00ff;
  color: #ffffff;
  transform: scale(1.1);
}

#matrix-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw !important;
  height: 100vh !important;
  z-index: 1;
  opacity: 0.15;
  mix-blend-mode: screen;
  pointer-events: none;
}

#gameCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw !important;
  height: 100vh !important;
  z-index: 2;
}

.matrix-btn {
  position: absolute;
  bottom: 20px;
  font-size: 18px;
  padding: 10px 20px;
  background-color: #0f0;
  color: #000;
  border: none;
  cursor: pointer;
  display: none;
  z-index: 10;
  font-family: 'Courier New', monospace;
  text-transform: uppercase;
  letter-spacing: 2px;
  transition: all 0.3s ease;
}

.matrix-btn:hover {
  background-color: #000;
  color: #0f0;
  box-shadow: 0 0 10px #0f0;
}

.title {
  text-align: center;
  margin-bottom: 2rem;
  text-shadow: 0 0 10px var(--primary-color);
  animation: glow 2s ease-in-out infinite alternate;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  z-index: 2;
}

.title-top {
  font-size: 114px;
}

.title-bottom {
  font-size: 144px;
}

@keyframes glow {
  from {
    text-shadow: 0 0 10px var(--primary-color);
  }
  to {
    text-shadow: 0 0 20px var(--primary-color),
                 0 0 30px var(--primary-color);
  }
}

.starfield {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

.star {
  position: absolute;
  background: white;
  border-radius: 50%;
  animation: twinkle var(--duration) ease-in-out infinite;
  opacity: 0;
}

@keyframes twinkle {
  0%, 100% { opacity: 0; }
  50% { opacity: var(--brightness); }
}

.menu-btn {
  background: transparent;
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
  padding: 1rem 2rem;
  margin: 0.8rem;
  font-size: 1.2rem;
  cursor: pointer;
  transition: all 0.3s ease;
  width: 200px;
  position: relative;
  z-index: 2;
}

.menu-btn:hover {
  background: var(--primary-color);
  color: var(--background-color);
  transform: scale(1.1);
}

.ascii-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  font-family: 'Courier New', monospace;
  white-space: pre;
  font-size: 10px;
  line-height: 1;
  z-index: 1;
  overflow: hidden;
  pointer-events: none;
  color: rgba(255, 0, 0, 1);
  animation: colorCycle 10s infinite;
  opacity: 1;
}

@keyframes colorCycle {
  0% { color: #ff0000; }
  33% { color: #ffff00; }
  66% { color: #ff00ff; }
  100% { color: #ff0000; }
}

.hud {
  position: absolute;
  top: 20px;
  left: 20px;
  font-size: 1.2rem;
  z-index: 4;
}

.audio-controls {
  position: absolute;
  top: 20px;
  right: 20px;
  display: flex;
  align-items: center;
  gap: 15px;
  z-index: 4;
}

.volume-control {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 0, 0, 0.5);
  padding: 5px 10px;
  border-radius: 20px;
  transition: opacity 0.3s ease;
}

.volume-control:hover {
  opacity: 1;
}

.volume-slider {
  width: 100px;
  height: 4px;
  -webkit-appearance: none;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  background: var(--primary-color);
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.3s ease;
}

.volume-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  background: #fff;
}

.volume-slider:focus {
  outline: none;
}

.game-btn {
  background: transparent;
  border: none;
  color: var(--text-color);
  font-size: 1.5rem;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity 0.3s ease;
  padding: 5px;
}

.game-btn:hover {
  opacity: 1;
}

.game-btn.muted {
  color: #ff4444;
}

.game-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  z-index: 4;
}

.music-btn {
  right: 70px !important;
}

.controls-list {
  margin: 2rem 0;
  font-size: 1.2rem;
  text-align: left;
  padding: 1.5rem 2.5rem;
  border: 1px solid var(--primary-color);
  border-radius: 8px;
  background: rgba(0, 255, 157, 0.05);
  min-width: 300px;
  width: 90%;
  position: relative;
  z-index: 2;
}

.controls-list p {
  margin: 0.5rem 0;
  color: var(--text-color);
}

.controls-table {
  width: 100%;
  border-collapse: collapse;
}

.controls-table tr td {
  padding: 0.5rem 1rem;
  color: var(--primary-color);
}

.controls-table tr td:first-child {
  font-weight: bold;
  text-align: right;
  padding-right: 1.5rem;
}

.controls-table tr td:last-child {
  text-align: left;
}

.ascii-line {
  position: relative;
  animation: glitch 3s infinite;
}

@keyframes glitch {
  0% { transform: none; opacity: 1; }
  7% { transform: skew(-0.5deg, -0.9deg); opacity: 0.75; }
  10% { transform: none; opacity: 1; }
  27% { transform: none; opacity: 1; }
  30% { transform: skew(0.8deg, -0.1deg); opacity: 0.75; }
  35% { transform: none; opacity: 1; }
  52% { transform: none; opacity: 1; }
  55% { transform: skew(-1deg, 0.2deg); opacity: 0.75; }
  50% { transform: none; opacity: 1; }
  72% { transform: none; opacity: 1; }
  75% { transform: skew(0.4deg, 1deg); opacity: 0.75; }
  80% { transform: none; opacity: 1; }
  100% { transform: none; opacity: 1; }
}

#game-screen #matrix-background {
  display: none;
}

#game-screen {
  background-color: #0a0a2a;
}

.player-input {
  margin: 20px 0;
  text-align: center;
  z-index: 2;
  position: relative;
}

.name-input {
  background: rgba(0, 255, 157, 0.1);
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
  padding: 10px 15px;
  font-size: 1.2rem;
  width: 200px;
  text-align: center;
  outline: none;
  transition: all 0.3s ease;
}

.name-input:focus {
  background: rgba(0, 255, 157, 0.2);
  box-shadow: 0 0 15px var(--primary-color);
}

.input-hint {
  color: var(--primary-color);
  font-size: 0.8rem;
  margin-top: 5px;
  opacity: 0.8;
}

.scores-container {
  background: rgba(0, 0, 0, 0.8);
  padding: 2rem;
  border-radius: 10px;
  border: 2px solid var(--primary-color);
  max-width: 600px;
  width: 90%;
  position: relative;
  z-index: 2;
}

.scores-container h2 {
  color: var(--primary-color);
  text-align: center;
  margin-bottom: 1.5rem;
  font-size: 2rem;
  text-transform: uppercase;
}

#scores-list {
  margin: 1rem 0;
  max-height: 400px;
  overflow-y: auto;
}

.score-entry {
  display: flex;
  justify-content: space-between;
  padding: 0.8rem;
  margin: 0.5rem 0;
  background: rgba(0, 255, 157, 0.1);
  border-radius: 5px;
  transition: all 0.3s ease;
}

.score-entry:hover {
  background: rgba(0, 255, 157, 0.2);
  transform: scale(1.02);
}

.score-entry.current {
  background: rgba(0, 255, 157, 0.3);
  box-shadow: 0 0 10px var(--primary-color);
}

.score-name {
  color: var(--text-color);
  font-weight: bold;
}

.score-value {
  color: var(--primary-color);
}

.score-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
}

.rankings-container {
  background: rgba(0, 0, 0, 0.9);
  padding: 2rem;
  border-radius: 10px;
  border: 2px solid var(--primary-color);
  max-width: 800px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  position: relative;
  z-index: 2;
  font-family: 'Roboto Mono', monospace;
}

.rankings-title {
  color: var(--primary-color);
  text-align: center;
  font-size: 3rem;
  margin-bottom: 2rem;
  text-transform: uppercase;
  letter-spacing: 4px;
  text-shadow: 0 0 10px var(--primary-color);
}

#rankings-list {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  padding: 0.5rem;
}

.ranking-entry {
  display: contents;
  font-size: 1.2rem;
  color: var(--text-color);
  transition: all 0.3s ease;
}

.ranking-entry > * {
  padding: 0.8rem;
  border-bottom: 1px solid rgba(0, 255, 157, 0.2);
}

.ranking-entry:hover > * {
  background: rgba(0, 255, 157, 0.1);
}

.ranking-position {
  color: var(--primary-color);
  font-weight: bold;
  text-align: right;
}

.ranking-name {
  color: #fff;
  padding-left: 2rem;
}

.ranking-score {
  color: var(--primary-color);
  text-align: right;
  font-weight: bold;
}

@media screen and (max-width: 768px) {
  .title-top {
    font-size: 48px;
  }

  .title-bottom {
    font-size: 72px;
  }

  .title img {
    width: 200px !important;
  }

  .controls-list {
    min-width: 280px;
    padding: 1rem 1.5rem;
    margin: 1rem;
    font-size: 1rem;
  }

  .menu-btn {
    width: 180px;
    padding: 0.8rem 1.6rem;
    font-size: 1rem;
  }

  .hud {
    font-size: 1rem;
    top: 10px;
    left: 10px;
  }

  .game-btn {
    top: 10px;
    right: 10px;
    font-size: 1.2rem;
  }

  #ascii-container {
    font-size: 6px; 
    padding: 10px;
  }

  .matrix-btn {
    padding: 8px 16px;
    font-size: 16px;
  }

  .music-btn {
    right: 50px !important;
  }

  .audio-controls {
    flex-direction: column;
    top: 10px;
    right: 10px;
    gap: 8px;
  }

  .volume-slider {
    width: 60px;
  }

  .game-btn {
    font-size: 1.2rem;
  }
  .scores-container {
    padding: 1rem;
  }

  .scores-container h2 {
    font-size: 1.5rem;
  }

  .score-entry {
    padding: 0.5rem;
    font-size: 0.9rem;
  }

  .score-buttons {
    flex-direction: column;
    gap: 0.5rem;
  }

  .name-input {
    width: 180px;
    font-size: 1rem;
  }
}