/* Import Inter font */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* CSS Variables for theming */
:root {
  --primary-color: #00d4ff;
  --secondary-color: #0099cc;
  --accent-color: #33e0ff;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --background-gradient: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 50%, #16213e 100%);
  --card-background: rgba(255, 255, 255, 0.95);
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --border-color: rgba(255, 255, 255, 0.2);
  --shadow-light: 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-medium: 0 10px 25px rgba(0, 0, 0, 0.1);
  --shadow-heavy: 0 20px 40px rgba(0, 0, 0, 0.15);
  --border-radius: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Theme variations */
.theme-cyberpunk {
  --primary-color: #00ff88;
  --secondary-color: #00cc6a;
  --accent-color: #33ffaa;
  --background-gradient: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 50%, #16213e 100%);
  --card-background: rgba(0, 0, 0, 0.8);
  --text-primary: #00ff88;
  --text-secondary: #66ffaa;
}

.theme-galaxy {
  --primary-color: #9333ea;
  --secondary-color: #7c3aed;
  --accent-color: #a855f7;
  --background-gradient: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #4c1d95 100%);
  --card-background: rgba(139, 92, 246, 0.1);
}

.theme-volcano {
  --primary-color: #dc2626;
  --secondary-color: #b91c1c;
  --accent-color: #ef4444;
  --background-gradient: linear-gradient(135deg, #7f1d1d 0%, #991b1b 50%, #dc2626 100%);
  --card-background: rgba(254, 202, 202, 0.9);
}

.theme-arctic {
  --primary-color: #0ea5e9;
  --secondary-color: #0284c7;
  --accent-color: #38bdf8;
  --background-gradient: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 50%, #bae6fd 100%);
  --card-background: rgba(255, 255, 255, 0.9);
}

.theme-rainbow {
  --primary-color: #ec4899;
  --secondary-color: #db2777;
  --accent-color: #f472b6;
  --background-gradient: linear-gradient(135deg, #fdf2f8 0%, #fce7f3 25%, #fbcfe8 50%, #f9a8d4 75%, #f472b6 100%);
  --card-background: rgba(255, 255, 255, 0.9);
}

.theme-midnight {
  --primary-color: #6366f1;
  --secondary-color: #4f46e5;
  --accent-color: #818cf8;
  --background-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
  --card-background: rgba(30, 41, 59, 0.8);
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
}

/* Glowing effects for cyberpunk theme */
.theme-cyberpunk .action-btn,
.theme-cyberpunk .stat-card,
.theme-cyberpunk .game-header {
  box-shadow: 0 0 20px rgba(0, 255, 136, 0.3);
}

.theme-cyberpunk #wordSearchTable td:hover {
  box-shadow: 0 0 15px rgba(0, 255, 136, 0.5);
}

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

body {
  font-family: 'Inter', sans-serif;
  background: var(--background-gradient);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

.game-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  position: relative;
  z-index: 1;
}

/* Header */
.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--card-background);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius);
  padding: 20px 30px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--border-color);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo i {
  font-size: 2rem;
  color: var(--primary-color);
  animation: pulse 2s infinite;
}

.logo h1 {
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-stats {
  display: flex;
  gap: 20px;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  font-weight: 600;
  color: var(--text-primary);
}

.stat-item i {
  color: var(--accent-color);
}

/* Game Controls */
.game-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--card-background);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius);
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--border-color);
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.control-group label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.control-group select {
  padding: 10px 16px;
  border: 2px solid transparent;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.9);
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition);
  min-width: 120px;
  appearance: none;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 8px center;
  background-repeat: no-repeat;
  background-size: 16px;
  padding-right: 40px;
}

.control-group select:hover {
  border-color: var(--primary-color);
  background-color: white;
}

.control-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.power-up-btn {
  position: relative;
  padding: 12px 20px;
  background: linear-gradient(45deg, var(--warning-color), #fbbf24);
  border: none;
  border-radius: 12px;
  color: white;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-light);
  position: relative;
  overflow: hidden;
  z-index: 10;
  pointer-events: auto;
}

.power-up-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

.power-up-btn i {
  margin-right: 8px;
}

.power-up-btn span {
  background: rgba(255, 255, 255, 0.2);
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 0.75rem;
}

/* Game Stats */
.game-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--card-background);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius);
  padding: 20px;
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-heavy);
}

.stat-icon {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.25rem;
}

.stat-content {
  flex: 1;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 4px;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* Game Board */
.game-board {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 30px;
  margin-bottom: 30px;
}

.grid-container {
  position: relative;
  background: var(--card-background);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius);
  padding: 30px;
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--border-color);
  display: flex;
  justify-content: center;
  align-items: center;
}

#wordSearchTable {
  border-collapse: separate;
  border-spacing: 2px;
  user-select: none;
  position: relative;
}

#wordSearchTable td {
  width: 45px;
  height: 45px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 8px;
  text-align: center;
  font-size: 1.25rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  background: rgba(255, 255, 255, 0.8);
  color: var(--text-primary);
  position: relative;
  overflow: hidden;
}

#wordSearchTable td::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s;
}

#wordSearchTable td:hover::before {
  transform: translateX(100%);
}

#wordSearchTable td:hover {
  transform: scale(1.05);
  border-color: var(--primary-color);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

#wordSearchTable td.selected {
  background: linear-gradient(45deg, var(--warning-color), #fbbf24);
  color: white;
  border-color: var(--warning-color);
  transform: scale(1.05);
  animation: pulse 0.5s;
}

#wordSearchTable td.found {
  background: linear-gradient(45deg, var(--success-color), #34d399);
  color: white;
  border-color: var(--success-color);
  animation: found 0.6s ease-out;
}

#wordSearchTable td.hint {
  background: linear-gradient(45deg, var(--accent-color), #60a5fa);
  color: white;
  border-color: var(--accent-color);
  animation: hint 1s ease-in-out;
}

/* Combo Indicator */
.combo-indicator {
  position: absolute;
  top: 20px;
  right: 20px;
  background: linear-gradient(45deg, var(--danger-color), #f87171);
  color: white;
  padding: 8px 16px;
  border-radius: 20px;
  font-weight: 700;
  font-size: 0.875rem;
  opacity: 0;
  transform: scale(0.8);
  transition: var(--transition);
}

.combo-indicator.active {
  opacity: 1;
  transform: scale(1);
  animation: bounce 0.5s ease-out;
}

/* Word List */
.word-list-container {
  background: var(--card-background);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius);
  padding: 25px;
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--border-color);
  height: fit-content;
}

.word-list-container h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  color: var(--text-primary);
  font-weight: 600;
}

.word-list-container h3 i {
  color: var(--primary-color);
}

.word-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.word-item {
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 8px;
  font-weight: 500;
  color: var(--text-primary);
  transition: var(--transition);
  border: 2px solid transparent;
}

.word-item:hover {
  background: rgba(255, 255, 255, 0.8);
  transform: translateX(4px);
}

.word-item.found {
  background: linear-gradient(45deg, var(--success-color), #34d399);
  color: white;
  text-decoration: line-through;
  opacity: 0.7;
}

.word-item.hint {
  border-color: var(--accent-color);
  background: rgba(59, 130, 246, 0.1);
  animation: pulse 1s;
}

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

.progress-fill {
  height: 100%;
  background: linear-gradient(45deg, var(--success-color), #34d399);
  border-radius: 4px;
  transition: width 0.5s ease-out;
  width: 0%;
}

/* Game Actions */
.game-actions {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.action-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border: none;
  border-radius: 12px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-light);
  min-width: 140px;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.action-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

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

.action-btn.primary {
  background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
  color: white;
}

.action-btn.secondary {
  background: linear-gradient(45deg, var(--text-secondary), #9ca3af);
  color: white;
}

.action-btn.tertiary {
  background: linear-gradient(45deg, var(--warning-color), #fbbf24);
  color: white;
}

.action-btn.special {
  background: linear-gradient(45deg, #8b5cf6, #a855f7);
  color: white;
  position: relative;
  overflow: hidden;
}

.action-btn.special::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s;
}

.action-btn.special:hover::before {
  left: 100%;
}

.action-btn, .power-up-btn, .challenge-btn {
  position: relative;
  overflow: hidden;
  z-index: 10;
  pointer-events: auto;
}

.theme-cyberpunk .action-btn,
.theme-galaxy .action-btn,
.theme-volcano .action-btn,
.theme-arctic .action-btn,
.theme-rainbow .action-btn,
.theme-midnight .action-btn {
  color: white;
  font-weight: 600;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(5px);
  z-index: 1000;
  animation: fadeIn 0.3s ease-out;
}

.modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background: var(--card-background);
  backdrop-filter: blur(20px);
  border-radius: 20px;
  max-width: 500px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: var(--shadow-heavy);
  border: 1px solid var(--border-color);
  animation: slideUp 0.3s ease-out;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 25px 30px 0;
  margin-bottom: 20px;
}

.modal-header h2 {
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.5rem;
}

.close-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 5px;
  border-radius: 50%;
  transition: var(--transition);
}

.close-btn:hover {
  background: rgba(0, 0, 0, 0.1);
  color: var(--text-primary);
}

.modal-body {
  padding: 0 30px;
}

.result-stats {
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-bottom: 25px;
}

.result-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 10px;
  font-size: 1rem;
}

.result-item i {
  color: var(--primary-color);
  width: 20px;
}

.achievement-section {
  margin-top: 25px;
}

.achievement-section h3 {
  color: var(--text-primary);
  margin-bottom: 15px;
  font-weight: 600;
}

.achievement-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: linear-gradient(45deg, var(--success-color), #34d399);
  color: white;
  border-radius: 8px;
  margin-bottom: 8px;
  animation: slideIn 0.5s ease-out;
}

.modal-footer {
  padding: 20px 30px 30px;
  display: flex;
  justify-content: center;
}

/* Sound Toggle */
.sound-toggle {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--card-background);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  color: var(--primary-color);
  font-size: 1.25rem;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-medium);
  z-index: 100;
}

.sound-toggle:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-heavy);
}

.sound-toggle.muted {
  color: var(--text-secondary);
}

/* Daily Challenge */
.daily-challenge {
  background: linear-gradient(45deg, var(--warning-color), #fbbf24);
  border-radius: var(--border-radius);
  padding: 20px;
  margin-bottom: 20px;
  color: white;
  box-shadow: var(--shadow-medium);
  animation: glow 2s ease-in-out infinite alternate;
}

.challenge-content {
  display: flex;
  align-items: center;
  gap: 20px;
}

.challenge-content i {
  font-size: 2rem;
}

.challenge-content div {
  flex: 1;
}

.challenge-content h3 {
  margin: 0 0 5px 0;
  font-size: 1.25rem;
  font-weight: 700;
}

.challenge-content p {
  margin: 0;
  opacity: 0.9;
}

.challenge-btn {
  background: rgba(255, 255, 255, 0.2);
  border: 2px solid rgba(255, 255, 255, 0.3);
  color: white;
  padding: 10px 20px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.challenge-btn:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.05);
}

/* Particles */
#particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 50%;
  animation: float 3s infinite ease-in-out;
}

/* Special effects */
.word-explosion {
  position: absolute;
  pointer-events: none;
  z-index: 1000;
}

.explosion-particle {
  position: absolute;
  width: 6px;
  height: 6px;
  background: var(--success-color);
  border-radius: 50%;
  animation: explode 0.8s ease-out forwards;
}

.screen-shake {
  animation: shake 0.5s ease-in-out;
}

/* Animations */
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-10px); }
  60% { transform: translateY(-5px); }
}

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

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

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

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

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

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  50% { transform: translateY(-20px) rotate(180deg); }
}

@keyframes glow {
  0% { box-shadow: 0 0 20px rgba(245, 158, 11, 0.5); }
  100% { box-shadow: 0 0 30px rgba(245, 158, 11, 0.8); }
}

@keyframes explode {
  0% { 
    transform: scale(1) translate(0, 0);
    opacity: 1;
  }
  100% { 
    transform: scale(0) translate(var(--dx), var(--dy));
    opacity: 0;
  }
}

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

/* Responsive Design */
@media (max-width: 1024px) {
  .game-board {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .word-list-container {
    order: -1;
  }
}

@media (max-width: 768px) {
  .game-container {
    padding: 15px;
  }
  
  .game-header {
    flex-direction: column;
    gap: 15px;
    text-align: center;
  }
  
  .game-controls {
    flex-direction: column;
    gap: 15px;
  }
  
  .game-stats {
    grid-template-columns: 1fr;
  }
  
  .game-actions {
    flex-direction: column;
    align-items: center;
  }
  
  #wordSearchTable td {
    width: 35px;
    height: 35px;
    font-size: 1rem;
  }
  
  .modal-content {
    margin: 20px;
    width: calc(100% - 40px);
  }
}

@media (max-width: 480px) {
  .logo h1 {
    font-size: 1.5rem;
  }
  
  .header-stats {
    flex-direction: column;
    gap: 10px;
  }
  
  #wordSearchTable td {
    width: 30px;
    height: 30px;
    font-size: 0.875rem;
  }
  
  .grid-container {
    padding: 20px;
  }
}