@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --primary-color: #667eea;
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --secondary-color: #f093fb;
  --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --success-color: #4ecdc4;
  --success-gradient: linear-gradient(135deg, #4ecdc4 0%, #44a08d 100%);
  --danger-color: #fd79a8;
  --danger-gradient: linear-gradient(135deg, #fd79a8 0%, #fdcb6e 100%);
  --warning-color: #fdcb6e;
  --dark-bg: #1a202c;
  --light-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --text-light: #2d3748;
  --text-dark: #f7fafc;
  --border-radius: 16px;
  --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --glass-bg: rgba(255, 255, 255, 0.25);
  --glass-border: rgba(255, 255, 255, 0.18);
  --text-color: #2d3748;
  --backdrop-blur: blur(16px);
}

* {
  box-sizing: border-box;
}

body { 
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 
  background: var(--light-bg);
  background-attachment: fixed;
  color: var(--text-light); 
  padding: 20px; 
  text-align: center; 
  transition: var(--transition); 
  font-size: 16px; 
  line-height: 1.7;
  min-height: 100vh;
  font-weight: 400;
  letter-spacing: -0.01em;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
              radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.3) 0%, transparent 50%),
              radial-gradient(circle at 40% 40%, rgba(120, 219, 255, 0.2) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

h1 { 
  color: #ffffff;
  text-shadow: 3px 3px 6px rgba(0,0,0,0.9), 1px 1px 3px rgba(0,0,0,0.8);
  margin: 30px 0; 
  font-size: 3.5rem; 
  font-weight: 800;
  letter-spacing: -0.02em;
  text-align: center;
  position: relative;
  animation: fadeInUp 1s ease-out;
}

h1::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 4px;
  background: var(--primary-gradient);
  border-radius: 2px;
  animation: scaleIn 1s ease-out 0.5s both;
}

.dark-mode { 
  background: linear-gradient(135deg, var(--dark-bg) 0%, #1a252f 100%);
  color: var(--text-dark); 
}

.container { 
  max-width: 600px; 
  margin: auto; 
  padding: 40px 30px; 
  border-radius: var(--border-radius); 
  transition: var(--transition);
  position: relative;
}

.container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  border-radius: var(--border-radius);
  border: 1px solid var(--glass-border);
  z-index: -1;
}

input[type="number"], input[type="text"] { 
  width: 100%; 
  padding: 16px 20px; 
  margin: 12px 0; 
  border: 2px solid transparent; 
  border-radius: var(--border-radius); 
  font-size: 16px; 
  font-weight: 500;
  transition: var(--transition); 
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  color: var(--text-light);
  box-shadow: var(--box-shadow);
  position: relative;
  overflow: hidden;
}

input[type="number"]::placeholder, input[type="text"]::placeholder {
  color: rgba(45, 55, 72, 0.6);
  font-weight: 400;
}

input[type="number"]:focus, input[type="text"]:focus {
  outline: none;
  border: 2px solid var(--primary-color);
  box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1), var(--box-shadow);
  transform: translateY(-3px) scale(1.02);
  background: rgba(255, 255, 255, 0.9);
}

.dark-mode input[type="number"], .dark-mode input, .dark-mode textarea {
  background: #ffffff !important;
  border-color: #555;
  color: #000000 !important;
}

.dark-mode input::placeholder {
  color: #666666 !important;
}

.btn { 
  background: var(--primary-gradient); 
  color: white; 
  border: none; 
  padding: 16px 32px; 
  border-radius: var(--border-radius); 
  cursor: pointer; 
  font-size: 16px; 
  font-weight: 600; 
  font-family: inherit;
  transition: var(--transition); 
  margin: 8px; 
  display: inline-flex; 
  align-items: center; 
  justify-content: center;
  gap: 10px;
  box-shadow: var(--box-shadow);
  position: relative;
  overflow: hidden;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  min-width: 140px;
}

.btn:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 15px 35px rgba(0,0,0,0.2);
  filter: brightness(1.1);
}

.btn:active {
  transform: translateY(-2px) scale(1.02);
  transition: var(--transition) 0.1s;
}

.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;
}

.btn:hover::before {
  left: 100%;
}

.btn-blue { background: linear-gradient(135deg, #3498db, #2980b9); }
.btn-info { background: linear-gradient(135deg, #17a2b8, #138496); color: white; }
.btn-warning { background: linear-gradient(135deg, #ffc107, #e0a800); color: white; }
.btn-red { background: linear-gradient(135deg, #e74c3c, #c0392b); color: white; }
.btn-green { background: linear-gradient(135deg, #2ecc71, #27ae60); color: white; }
.btn-purple { background: linear-gradient(135deg, #9b59b6, #8e44ad); }

.results h2 { 
  margin: 15px 0; 
  padding: 10px;
  border-radius: var(--border-radius);
}

.deck-container { 
  background: var(--glass-bg); 
  backdrop-filter: var(--backdrop-blur);
  border-radius: var(--border-radius); 
  padding: 30px; 
  margin: 20px 0; 
  box-shadow: var(--box-shadow); 
  transition: var(--transition); 
  border: 1px solid var(--glass-border);
  position: relative;
  overflow: hidden;
  animation: slideInUp 0.6s ease-out;
}

.deck-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--primary-gradient);
}

.deck-container:hover {
  transform: translateY(-5px);
  box-shadow: 0 25px 50px rgba(0,0,0,0.15);
}

.input-group {
  margin: 20px 0;
  position: relative;
}

label {
  font-weight: 600;
  color: var(--text-light);
  margin-bottom: 8px;
  display: block;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.results {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  border-radius: var(--border-radius);
  padding: 25px;
  margin: 20px 0;
  border: 1px solid var(--glass-border);
  animation: slideInUp 0.5s ease-out;
}

.result-item {
  padding: 15px;
  margin: 10px 0;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  border-left: 4px solid var(--primary-color);
  transition: var(--transition);
}

.result-item:hover {
  transform: translateX(5px);
  background: rgba(255, 255, 255, 0.2);
}

.action-buttons {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 20px;
}

/* Fullscreen Modal Styles */
.fullscreen-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.95);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(10px);
}

.modal-content-fullscreen {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  border-radius: var(--border-radius);
  width: 95%;
  height: 95%;
  max-width: 1200px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--glass-border);
  overflow: hidden;
}

.modal-header-fullscreen {
  padding: 20px 30px;
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255, 255, 255, 0.1);
}

.modal-header-fullscreen h2 {
  margin: 0;
  color: var(--text-light);
  font-size: 2rem;
}

.close-btn-fullscreen {
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--text-light);
  cursor: pointer;
  padding: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: var(--transition);
}

.close-btn-fullscreen:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: scale(1.1);
}

.modal-body-fullscreen {
  flex: 1;
  padding: 30px;
  overflow-y: auto;
  color: var(--text-light);
}

.modal-footer-fullscreen {
  padding: 20px 30px;
  border-top: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: center;
}

.dark-mode .modal-header-fullscreen h2,
.dark-mode .close-btn-fullscreen,
.dark-mode .modal-body-fullscreen {
  color: var(--text-dark);
}

/* Navigation Menu Styles */
.nav-menu {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  border-radius: 50px;
  padding: 10px 20px;
  display: flex;
  gap: 15px;
  box-shadow: var(--box-shadow);
  border: 1px solid var(--glass-border);
  z-index: 1000;
}

.nav-btn {
  background: transparent;
  border: none;
  color: var(--text-light);
  font-size: 20px;
  padding: 12px;
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.nav-btn:hover {
  background: var(--primary-gradient);
  color: white;
  transform: translateY(-3px);
}

.nav-btn.active {
  background: var(--primary-gradient);
  color: white;
}

/* Analytics Dashboard Styles */
.analytics-dashboard {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  border-radius: var(--border-radius);
  padding: 30px;
  margin: 20px 0;
  border: 1px solid var(--glass-border);
  animation: slideInUp 0.6s ease-out;
}

.analytics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.analytics-card {
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius);
  padding: 20px;
  border: 1px solid var(--glass-border);
  transition: var(--transition);
}

.analytics-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--box-shadow);
}

/* Deck History Styles */
.deck-history {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  border-radius: var(--border-radius);
  padding: 30px;
  margin: 20px 0;
  border: 1px solid var(--glass-border);
  animation: slideInUp 0.6s ease-out;
}

.history-timeline {
  position: relative;
  padding: 20px 0;
}

.history-item {
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius);
  padding: 15px;
  margin: 10px 0;
  border-left: 4px solid var(--primary-color);
  transition: var(--transition);
}

.history-item:hover {
  transform: translateX(10px);
  background: rgba(255, 255, 255, 0.2);
}

/* Achievement Center Styles */
.achievement-center {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  border-radius: var(--border-radius);
  padding: 30px;
  margin: 20px 0;
  border: 1px solid var(--glass-border);
  animation: slideInUp 0.6s ease-out;
}

.achievement-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.achievement-card {
  background: var(--glass-bg);
  border-radius: var(--border-radius);
  padding: 20px;
  text-align: center;
  border: 1px solid var(--glass-border);
  transition: var(--transition);
  cursor: pointer;
}

.achievement-card:hover {
  transform: scale(1.05);
  box-shadow: var(--box-shadow);
}

.achievement-card.unlocked {
  background: var(--success-gradient);
  color: white;
}

.achievement-icon {
  font-size: 3rem;
  margin-bottom: 10px;
}

/* Leaderboard Styles */
.leaderboards {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  border-radius: var(--border-radius);
  padding: 30px;
  margin: 20px 0;
  border: 1px solid var(--glass-border);
  animation: slideInUp 0.6s ease-out;
}

.leaderboard-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

.tab-btn {
  background: transparent;
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
  padding: 10px 20px;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  font-weight: 600;
}

.tab-btn.active, .tab-btn:hover {
  background: var(--primary-gradient);
  color: white;
}

.leaderboard-item {
  display: flex;
  align-items: center;
  padding: 15px;
  margin: 10px 0;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.leaderboard-item:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateX(5px);
}

.leaderboard-rank {
  font-size: 1.5rem;
  font-weight: bold;
  margin-right: 15px;
  min-width: 40px;
}

/* Deck Builder Styles */
.deck-builder {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  border-radius: var(--border-radius);
  padding: 30px;
  margin: 20px 0;
  border: 1px solid var(--glass-border);
  animation: slideInUp 0.6s ease-out;
}

.card-categories {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.category-btn {
  background: transparent;
  border: 2px solid var(--secondary-color);
  color: var(--secondary-color);
  padding: 8px 16px;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  font-weight: 600;
}

.category-btn.active, .category-btn:hover {
  background: var(--secondary-gradient);
  color: white;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: 10px;
  margin-bottom: 20px;
}

.card-item {
  aspect-ratio: 1;
  background: var(--glass-bg);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
}

.card-item:hover {
  transform: scale(1.1);
  border-color: var(--primary-color);
}

.card-item.selected {
  border-color: var(--success-color);
  background: var(--success-gradient);
}

.selected-cards {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  min-height: 80px;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--border-radius);
  padding: 10px;
}

/* Tournament Simulator Styles */
.tournament-sim {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  border-radius: var(--border-radius);
  padding: 30px;
  margin: 20px 0;
  border: 1px solid var(--glass-border);
  animation: slideInUp 0.6s ease-out;
}

.tournament-setup {
  display: flex;
  gap: 15px;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.tournament-setup select {
  padding: 10px;
  border-radius: var(--border-radius);
  border: 2px solid var(--primary-color);
  background: var(--glass-bg);
  color: var(--text-light);
}

.bracket-display {
  overflow-x: auto;
  padding: 20px;
}

/* Meta Analysis Styles */
.meta-analysis {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  border-radius: var(--border-radius);
  padding: 30px;
  margin: 20px 0;
  border: 1px solid var(--glass-border);
  animation: slideInUp 0.6s ease-out;
}

.meta-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

.meta-content {
  min-height: 300px;
}

/* Sign-in Status Styles */
.sign-in-status {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  border-radius: var(--border-radius);
  padding: 15px 20px;
  margin: 20px 0;
  border: 1px solid var(--glass-border);
  font-weight: 600;
}

.sign-in-status.signed-in {
  border-left: 4px solid var(--success-color);
  color: var(--success-color);
}

.sign-in-status.signed-out {
  border-left: 4px solid var(--warning-color);
  color: var(--warning-color);
}

.google-signin-container {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 20px 0;
  gap: 10px;
}

.deck-counter {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  border-radius: var(--border-radius);
  padding: 10px 15px;
  margin: 15px 0;
  border: 1px solid var(--glass-border);
  font-weight: 600;
  color: var(--primary-color);
}

.rate-another-container, .compare-container {
  text-align: center;
  margin: 20px 0;
}

/* Settings Section Styles */
.settings-section {
  margin: 30px 0;
  padding: 20px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--border-radius);
  border: 1px solid var(--glass-border);
}

.settings-section h3, .settings-section h4 {
  color: var(--primary-color);
  margin-bottom: 15px;
}

.color-picker-group {
  display: flex;
  gap: 10px;
  margin: 10px 0;
}

.color-picker {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
}

.color-picker:hover, .color-picker.selected {
  border-color: white;
  transform: scale(1.1);
}

.slider-container {
  margin: 15px 0;
}

.slider {
  width: 100%;
  margin: 10px 0;
}

.slider-value {
  font-weight: 600;
  color: var(--primary-color);
}

.toggle-switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 34px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  transition: .4s;
  border-radius: 34px;
}

.toggle-slider:before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: .4s;
  border-radius: 50%;
}

input:checked + .toggle-slider {
  background: var(--primary-gradient);
}

input:checked + .toggle-slider:before {
  transform: translateX(26px);
}

/* Help Section Styles */
.help-section {
  margin: 25px 0;
  padding: 20px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--border-radius);
  border-left: 4px solid var(--primary-color);
}

.help-section h4 {
  color: var(--primary-color);
  margin-bottom: 15px;
}

.help-section ul, .help-section ol {
  padding-left: 20px;
}

.help-section li {
  margin: 8px 0;
  line-height: 1.6;
}

kbd {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--glass-border);
  border-radius: 4px;
  padding: 2px 6px;
  font-family: monospace;
  font-size: 0.9em;
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes scaleIn {
  from {
    transform: translateX(-50%) scaleX(0);
  }
  to {
    transform: translateX(-50%) scaleX(1);
  }
}

/* Enhanced Mobile Responsiveness */
@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }
  
  .container {
    padding: 20px 15px;
  }
  
  .deck-container {
    padding: 20px;
    margin: 15px 0;
  }
  
  .btn {
    padding: 14px 24px;
    font-size: 14px;
    min-width: 120px;
  }
  
  .action-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .nav-menu {
    bottom: 10px;
    padding: 8px 15px;
    gap: 10px;
  }
  
  .nav-btn {
    font-size: 18px;
    padding: 10px;
  }
  
  .analytics-grid {
    grid-template-columns: 1fr;
  }
  
  .achievement-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
  
  .card-categories {
    justify-content: center;
  }
  
  .tournament-setup {
    justify-content: center;
  }
  
  .leaderboard-tabs {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .google-signin-container {
    flex-direction: column;
  }
}