/* ============================================
   DP MASTERS ARENA - Complete Styles
   60 Dynamic Programming Games
   ============================================ */

:root {
  --bg-dark: #0a0a12;
  --bg-card: #12121f;
  --bg-hover: #1a1a2f;
  --primary: #00ffcc;
  --secondary: #ff00aa;
  --accent: #ffaa00;
  --danger: #ff3366;
  --success: #00ff88;
  --text: #e0e0ff;
  --text-dim: #8888aa;
  --glow-cyan: 0 0 20px rgba(0, 255, 204, 0.5);
  --glow-magenta: 0 0 20px rgba(255, 0, 170, 0.5);
  --glow-gold: 0 0 20px rgba(255, 170, 0, 0.5);
}

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

body {
  font-family: 'Rajdhani', sans-serif;
  background: var(--bg-dark);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Particle Background */
#particle-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(
      ellipse at 20% 20%,
      rgba(0, 255, 204, 0.05) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse at 80% 80%,
      rgba(255, 0, 170, 0.05) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse at 50% 50%,
      rgba(255, 170, 0, 0.03) 0%,
      transparent 70%
    );
}

/* Screens */
.screen {
  display: none;
  min-height: 100vh;
  padding: 20px;
  position: relative;
  z-index: 1;
}

.screen.active {
  display: block;
  animation: fadeIn 0.5s ease;
}

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

/* Main Menu Header */
.menu-header {
  text-align: center;
  padding: 40px 20px;
}

.glitch-title {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(2rem, 6vw, 4rem);
  font-weight: 900;
  color: var(--primary);
  text-shadow:
    0 0 10px var(--primary),
    0 0 20px var(--primary),
    0 0 40px var(--primary);
  animation: glitch 3s infinite;
  position: relative;
}

@keyframes glitch {
  0%,
  90%,
  100% {
    transform: translateX(0);
  }
  92% {
    transform: translateX(-5px);
    text-shadow:
      -3px 0 var(--secondary),
      3px 0 var(--accent);
  }
  94% {
    transform: translateX(5px);
    text-shadow:
      3px 0 var(--secondary),
      -3px 0 var(--accent);
  }
  96% {
    transform: translateX(-3px);
  }
  98% {
    transform: translateX(3px);
  }
}

.subtitle {
  font-size: 1.5rem;
  color: var(--text-dim);
  margin-top: 10px;
  letter-spacing: 3px;
}

.energy-bar {
  width: 300px;
  max-width: 80%;
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  margin: 20px auto;
  border-radius: 2px;
  overflow: hidden;
}

.energy-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(
    90deg,
    var(--primary),
    var(--secondary),
    var(--accent)
  );
  animation: energyFill 2s ease forwards;
}

@keyframes energyFill {
  to {
    width: 100%;
  }
}

/* Sections Grid */
.sections-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px;
}

.section-card {
  background: var(--bg-card);
  border: 2px solid transparent;
  border-radius: 16px;
  padding: 30px;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.section-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.section-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
  box-shadow: var(--glow-cyan);
}

.section-card.section-a::before {
  background: linear-gradient(90deg, #ff6b6b, #ff8e53);
}
.section-card.section-b::before {
  background: linear-gradient(90deg, #5f27cd, #9b59b6);
}
.section-card.section-c::before {
  background: linear-gradient(90deg, #00d2d3, #54a0ff);
}
.section-card.section-d::before {
  background: linear-gradient(90deg, #ff9f43, #feca57);
}
.section-card.section-e::before {
  background: linear-gradient(90deg, #00cec9, #81ecec);
}
.section-card.section-f::before {
  background: linear-gradient(90deg, #00b894, #55efc4);
}
.section-card.section-g::before {
  background: linear-gradient(90deg, #6c5ce7, #a29bfe);
}
.section-card.section-h::before {
  background: linear-gradient(90deg, #fd79a8, #e84393);
}
.section-card.section-i::before {
  background: linear-gradient(90deg, #fdcb6e, #f39c12);
}

.section-icon {
  font-size: 3rem;
  margin-bottom: 15px;
}

.section-card h3 {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.3rem;
  color: var(--primary);
  margin-bottom: 5px;
}

.section-card p {
  color: var(--text-dim);
  font-size: 1rem;
}

.game-count {
  display: inline-block;
  background: rgba(0, 255, 204, 0.1);
  color: var(--primary);
  padding: 5px 15px;
  border-radius: 20px;
  font-size: 0.9rem;
  margin-top: 15px;
}

/* Section Menu */
.section-menu {
  max-width: 1200px;
  margin: 0 auto;
}

.section-menu h2 {
  font-family: 'Orbitron', sans-serif;
  font-size: 2rem;
  color: var(--primary);
  text-align: center;
  margin-bottom: 30px;
  text-shadow: var(--glow-cyan);
}

/* Back Button */
.back-btn {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
  padding: 10px 20px;
  border-radius: 8px;
  font-family: 'Rajdhani', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-bottom: 20px;
}

.back-btn:hover {
  background: var(--primary);
  color: var(--bg-dark);
  box-shadow: var(--glow-cyan);
}

/* Games List */
.games-list {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.game-item {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 20px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.game-item:hover {
  border-color: var(--primary);
  transform: translateX(10px);
  box-shadow: var(--glow-cyan);
}

.game-num {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  min-width: 60px;
  text-align: center;
}

.game-info h4 {
  font-size: 1.2rem;
  color: var(--text);
  margin-bottom: 5px;
}

.game-info p {
  font-size: 0.9rem;
  color: var(--text-dim);
  font-family: 'Share Tech Mono', monospace;
}

/* Game Container */
#game-container {
  padding: 20px;
  max-width: 1600px;
  margin: 0 auto;
}

.game-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 15px;
  margin-bottom: 20px;
}

.game-header h2 {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.5rem;
  color: var(--primary);
}

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

.ctrl-btn {
  background: rgba(255, 170, 0, 0.1);
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 8px 16px;
  border-radius: 6px;
  font-family: 'Rajdhani', sans-serif;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.ctrl-btn:hover {
  background: var(--accent);
  color: var(--bg-dark);
}

/* Game Area */
#game-area {
  background: var(--bg-card);
  border: 2px solid rgba(0, 255, 204, 0.3);
  border-radius: 16px;
  min-height: 400px;
  padding: 30px;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}

/* DP Display */
#dp-display {
  background: var(--bg-card);
  border: 2px solid rgba(255, 0, 170, 0.3);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 20px;
}

#dp-display h3 {
  font-family: 'Orbitron', sans-serif;
  color: var(--secondary);
  margin-bottom: 15px;
}

#dp-table {
  font-family: 'Share Tech Mono', monospace;
  overflow-x: auto;
}

/* Explanation Panel */
#explanation-panel {
  background: linear-gradient(
    135deg,
    rgba(18, 18, 31, 0.9),
    rgba(26, 26, 47, 0.9)
  );
  border: 2px solid rgba(255, 170, 0, 0.3);
  border-radius: 16px;
  padding: 20px;
}

#explanation-panel h3 {
  font-family: 'Orbitron', sans-serif;
  color: var(--accent);
  margin-bottom: 15px;
}

#explanation-content {
  line-height: 1.8;
}

#explanation-content code {
  background: rgba(0, 255, 204, 0.1);
  padding: 2px 8px;
  border-radius: 4px;
  font-family: 'Share Tech Mono', monospace;
  color: var(--primary);
}

/* Game-Specific Styles */

/* Staircase / Ladder */
.staircase {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 5px;
  min-height: 300px;
  padding: 20px;
}

.stair {
  width: 60px;
  background: linear-gradient(180deg, var(--primary), #006655);
  border-radius: 4px 4px 0 0;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10px;
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  color: var(--bg-dark);
  transition: all 0.3s ease;
  position: relative;
}

.stair.active {
  background: linear-gradient(180deg, var(--accent), #aa7700);
  box-shadow: var(--glow-gold);
}

.stair.computed {
  animation: pulse 0.5s ease;
}

.stair-label {
  position: absolute;
  bottom: -25px;
  font-size: 0.8rem;
  color: var(--text-dim);
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
}

/* Grid-based games */
.dp-grid {
  display: grid;
  gap: 3px;
  justify-content: center;
}

.grid-cell {
  width: 50px;
  height: 50px;
  background: var(--bg-hover);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.9rem;
  transition: all 0.3s ease;
}

.grid-cell.obstacle {
  background: var(--danger);
  color: white;
}

.grid-cell.path {
  background: var(--primary);
  color: var(--bg-dark);
  box-shadow: var(--glow-cyan);
}

.grid-cell.current {
  background: var(--accent);
  color: var(--bg-dark);
  animation: glow-pulse 1s infinite;
}

.grid-cell.highlight {
  background: var(--secondary);
  color: white;
}

@keyframes glow-pulse {
  0%,
  100% {
    box-shadow: 0 0 10px var(--accent);
  }
  50% {
    box-shadow: 0 0 30px var(--accent);
  }
}

/* Houses (Robber game) */
.houses-container {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  padding: 40px 20px;
}

.house {
  width: 80px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
}

.house-roof {
  width: 0;
  height: 0;
  border-left: 50px solid transparent;
  border-right: 50px solid transparent;
  border-bottom: 40px solid #665544;
  margin: 0 auto;
  position: relative;
}

.house-body {
  width: 80px;
  height: 60px;
  background: #887766;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  color: var(--bg-dark);
}

.house.selected .house-roof {
  border-bottom-color: var(--success);
}

.house.selected .house-body {
  background: var(--success);
  box-shadow: 0 0 20px var(--success);
}

.house.exploded .house-roof,
.house.exploded .house-body {
  animation: explode 0.5s forwards;
}

@keyframes explode {
  to {
    transform: scale(0);
    opacity: 0;
  }
}

/* Knapsack / Items */
.items-container {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
  justify-content: center;
  padding: 20px;
}

.item-box {
  width: 80px;
  height: 100px;
  background: linear-gradient(135deg, #4a4a6a, #2a2a4a);
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
}

.item-box:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
}

.item-box.taken {
  background: linear-gradient(135deg, #00aa88, #006655);
  border-color: var(--primary);
  box-shadow: var(--glow-cyan);
}

.item-weight {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.item-value {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.2rem;
  color: var(--accent);
}

/* Bag visualization */
.bag-container {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 30px;
  flex-wrap: wrap;
  margin-top: 30px;
}

.bag {
  width: 200px;
  height: 150px;
  background: linear-gradient(180deg, #553322, #442211);
  border-radius: 10px 10px 50px 50px;
  border: 3px solid #775544;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 20px;
}

.bag-label {
  color: var(--accent);
  font-family: 'Orbitron', sans-serif;
  font-size: 0.9rem;
}

.bag-value {
  font-family: 'Orbitron', sans-serif;
  font-size: 2rem;
  color: var(--primary);
  text-shadow: var(--glow-cyan);
}

/* Tower visualization (LIS, etc.) */
.towers-container {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 10px;
  min-height: 300px;
  padding: 20px;
}

.tower {
  width: 50px;
  background: linear-gradient(180deg, #6666aa, #444477);
  border-radius: 4px 4px 0 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding-top: 10px;
  transition: all 0.5s ease;
  position: relative;
}

.tower-value {
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  color: white;
}

.tower-dp {
  position: absolute;
  top: -25px;
  font-size: 0.8rem;
  color: var(--primary);
  background: rgba(0, 0, 0, 0.8);
  padding: 2px 8px;
  border-radius: 4px;
}

.tower.selected {
  background: linear-gradient(180deg, var(--primary), #006655);
  box-shadow: var(--glow-cyan);
}

.tower.highlight {
  background: linear-gradient(180deg, var(--accent), #aa7700);
}

/* String visualization */
.string-display {
  display: flex;
  justify-content: center;
  gap: 5px;
  flex-wrap: wrap;
  padding: 20px;
}

.char-box {
  width: 40px;
  height: 50px;
  background: var(--bg-hover);
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Share Tech Mono', monospace;
  font-size: 1.5rem;
  transition: all 0.3s ease;
}

.char-box.match {
  background: var(--primary);
  color: var(--bg-dark);
  border-color: var(--primary);
  box-shadow: var(--glow-cyan);
}

.char-box.delete {
  background: var(--danger);
  color: white;
  border-color: var(--danger);
}

.char-box.insert {
  background: var(--success);
  color: var(--bg-dark);
  border-color: var(--success);
}

.char-box.palindrome {
  background: linear-gradient(135deg, var(--secondary), var(--primary));
  color: white;
  animation: mirror-glow 1s infinite alternate;
}

@keyframes mirror-glow {
  from {
    box-shadow: 0 0 10px var(--secondary);
  }
  to {
    box-shadow: 0 0 30px var(--primary);
  }
}

/* Coin visualization */
.coins-container {
  display: flex;
  justify-content: center;
  gap: 15px;
  flex-wrap: wrap;
  padding: 20px;
}

.coin {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, #ffdd44, #cc9900);
  border: 3px solid #aa8800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  color: #553300;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: inset 0 -3px 10px rgba(0, 0, 0, 0.3);
}

.coin:hover {
  transform: scale(1.1) rotate(10deg);
}

.coin.used {
  box-shadow:
    0 0 20px #ffdd44,
    inset 0 -3px 10px rgba(0, 0, 0, 0.3);
  animation: coin-bounce 0.5s ease;
}

@keyframes coin-bounce {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

/* DP Table styles */
.dp-table-grid {
  display: inline-grid;
  gap: 2px;
  background: rgba(0, 0, 0, 0.3);
  padding: 10px;
  border-radius: 8px;
}

.dp-cell {
  width: 45px;
  height: 35px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  transition: all 0.3s ease;
}

.dp-cell.header {
  background: rgba(0, 255, 204, 0.2);
  color: var(--primary);
  font-weight: 600;
}

.dp-cell.computed {
  background: rgba(255, 170, 0, 0.2);
  border-color: var(--accent);
  animation: cell-compute 0.3s ease;
}

.dp-cell.optimal {
  background: rgba(0, 255, 204, 0.3);
  border-color: var(--primary);
  box-shadow: 0 0 10px var(--primary);
}

@keyframes cell-compute {
  0% {
    transform: scale(1.2);
    background: rgba(255, 170, 0, 0.5);
  }
  100% {
    transform: scale(1);
  }
}

/* Tree visualization */
.tree-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 30px;
}

.tree-node {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, #5555aa, #333377);
  border: 3px solid #7777cc;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  color: white;
  position: relative;
  transition: all 0.3s ease;
}

.tree-node.active {
  background: linear-gradient(135deg, var(--primary), #006655);
  border-color: var(--primary);
  box-shadow: var(--glow-cyan);
}

.tree-node.matched {
  background: linear-gradient(135deg, var(--secondary), #990066);
  border-color: var(--secondary);
}

.tree-edge {
  stroke: #555588;
  stroke-width: 2;
  transition: all 0.3s ease;
}

.tree-edge.active {
  stroke: var(--primary);
  stroke-width: 3;
  filter: drop-shadow(0 0 5px var(--primary));
}

/* Balloon visualization */
.balloons-container {
  display: flex;
  justify-content: center;
  gap: 15px;
  flex-wrap: wrap;
  padding: 30px;
}

.balloon {
  width: 60px;
  height: 75px;
  border-radius: 50%;
  position: relative;
  cursor: pointer;
  transition: all 0.3s ease;
}

.balloon::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 20px;
  background: #888;
}

.balloon:hover {
  transform: translateY(-10px);
}

.balloon.popped {
  animation: pop 0.3s forwards;
}

@keyframes pop {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.5);
    opacity: 0.5;
  }
  100% {
    transform: scale(0);
    opacity: 0;
  }
}

/* Mode selector */
.mode-selector {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 20px;
}

.mode-btn {
  padding: 10px 20px;
  background: var(--bg-hover);
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  color: var(--text);
  font-family: 'Rajdhani', sans-serif;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.mode-btn:hover {
  border-color: var(--primary);
}

.mode-btn.active {
  background: var(--primary);
  color: var(--bg-dark);
  border-color: var(--primary);
}

/* Stats display */
.stats-bar {
  display: flex;
  justify-content: center;
  gap: 30px;
  padding: 15px;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 8px;
  margin-bottom: 20px;
}

.stat-item {
  text-align: center;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.stat-value {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.5rem;
  color: var(--primary);
}

/* Progress indicator */
.progress-container {
  display: flex;
  justify-content: center;
  gap: 5px;
  margin: 20px 0;
}

.progress-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transition: all 0.3s ease;
}

.progress-dot.active {
  background: var(--primary);
  box-shadow: var(--glow-cyan);
}

.progress-dot.completed {
  background: var(--success);
}

/* Control buttons */
.game-buttons {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.game-btn {
  padding: 12px 30px;
  background: linear-gradient(135deg, var(--primary), #00aa88);
  border: none;
  border-radius: 8px;
  color: var(--bg-dark);
  font-family: 'Rajdhani', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s ease;
}

.game-btn:hover {
  transform: translateY(-3px);
  box-shadow: var(--glow-cyan);
}

.game-btn.secondary {
  background: transparent;
  border: 2px solid var(--secondary);
  color: var(--secondary);
}

.game-btn.secondary:hover {
  background: var(--secondary);
  color: white;
}

/* Input fields */
.input-group {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin: 15px 0;
  flex-wrap: wrap;
}

.game-input {
  padding: 10px 15px;
  background: var(--bg-hover);
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  color: var(--text);
  font-family: 'Share Tech Mono', monospace;
  font-size: 1rem;
  outline: none;
  transition: all 0.3s ease;
}

.game-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 10px rgba(0, 255, 204, 0.3);
}

/* Graph visualization */
.graph-container {
  width: 100%;
  height: 400px;
  position: relative;
}

.graph-node {
  position: absolute;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, #4a4a8a, #2a2a5a);
  border: 3px solid #6a6aaa;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Orbitron', sans-serif;
  color: white;
  transition: all 0.3s ease;
}

.graph-node.visited {
  background: linear-gradient(135deg, var(--primary), #006655);
  border-color: var(--primary);
  box-shadow: var(--glow-cyan);
}

.graph-node.current {
  animation: node-pulse 0.5s infinite alternate;
}

@keyframes node-pulse {
  from {
    transform: scale(1);
    box-shadow: 0 0 10px var(--accent);
  }
  to {
    transform: scale(1.1);
    box-shadow: 0 0 30px var(--accent);
  }
}

/* Water visualization (Rainwater) */
.water-container {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 3px;
  min-height: 250px;
  padding: 20px;
  position: relative;
}

.water-bar {
  width: 40px;
  background: linear-gradient(180deg, #665544, #443322);
  position: relative;
  border-radius: 2px 2px 0 0;
}

.water-level {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  background: linear-gradient(
    180deg,
    rgba(0, 150, 255, 0.7),
    rgba(0, 100, 200, 0.5)
  );
  border-radius: 2px 2px 0 0;
  animation: water-fill 1s ease forwards;
}

@keyframes water-fill {
  from {
    height: 0;
  }
}

/* Frog jump visualization */
.stones-container {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 20px;
  padding: 40px 20px;
}

.stone {
  width: 60px;
  text-align: center;
}

.stone-platform {
  width: 60px;
  height: 30px;
  background: linear-gradient(180deg, #666, #444);
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Orbitron', sans-serif;
  color: white;
}

.stone-height {
  height: 100px;
  width: 4px;
  background: linear-gradient(180deg, rgba(100, 100, 100, 0.5), transparent);
  margin: 0 auto 5px;
}

.frog {
  position: absolute;
  font-size: 2rem;
  transition: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  z-index: 10;
}

/* Bitmask visualization */
.bitmask-display {
  display: flex;
  justify-content: center;
  gap: 5px;
  margin: 20px 0;
}

.bit {
  width: 40px;
  height: 40px;
  background: var(--bg-hover);
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Share Tech Mono', monospace;
  font-size: 1.2rem;
  transition: all 0.3s ease;
}

.bit.on {
  background: var(--primary);
  color: var(--bg-dark);
  border-color: var(--primary);
  box-shadow: var(--glow-cyan);
}

/* Responsive */
@media (max-width: 768px) {
  .sections-grid {
    grid-template-columns: 1fr;
  }

  .game-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .stair,
  .tower {
    width: 40px;
  }

  .grid-cell {
    width: 35px;
    height: 35px;
    font-size: 0.7rem;
  }

  .house {
    width: 60px;
  }

  .house-roof {
    border-left-width: 35px;
    border-right-width: 35px;
    border-bottom-width: 30px;
  }

  .house-body {
    width: 60px;
    height: 45px;
  }
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--secondary);
}

/* Formula display */
.formula-box {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(0, 255, 204, 0.3);
  border-radius: 8px;
  padding: 15px 20px;
  margin: 15px auto;
  max-width: fit-content;
  font-family: 'Share Tech Mono', monospace;
  font-size: 1.1rem;
  color: var(--primary);
}

/* Speed indicator */
.speed-indicator {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: rgba(0, 0, 0, 0.8);
  border: 1px solid var(--primary);
  border-radius: 8px;
  padding: 10px 20px;
  font-family: 'Share Tech Mono', monospace;
  color: var(--primary);
  z-index: 100;
}

/* Comparison visualization */
.comparison-container {
  display: flex;
  justify-content: space-around;
  gap: 20px;
  flex-wrap: wrap;
}

.comparison-box {
  flex: 1;
  min-width: 250px;
  background: var(--bg-hover);
  border-radius: 12px;
  padding: 20px;
  text-align: center;
}

.comparison-box h4 {
  color: var(--accent);
  margin-bottom: 15px;
}

.time-display {
  font-family: 'Orbitron', sans-serif;
  font-size: 2rem;
  color: var(--primary);
}

/* Animation classes */
.animate-in {
  animation: slideIn 0.5s ease forwards;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.bounce {
  animation: bounce 0.5s ease;
}

@keyframes bounce {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.shake {
  animation: shake 0.5s ease;
}

@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-5px);
  }
  75% {
    transform: translateX(5px);
  }
}