/* 🌟 CSS Custom Properties */
:root {
  --primary-color: #00d2ff;
  --primary-dark: #0099cc;
  --secondary-color: #ff6a00;
  --secondary-dark: #cc5500;
  --success-color: #4CAF50;
  --error-color: #FF5252;
  --warning-color: #FFC107;
  --info-color: #2196F3;
  --background-gradient: linear-gradient(135deg, #141E30, #243B55);
  --card-background: rgba(255,255,255,0.08);
  --card-background-hover: rgba(255,255,255,0.12);
  --border-color: rgba(255,255,255,0.15);
  --border-color-focus: rgba(0,210,255,0.5);
  --text-color: #fff;
  --text-secondary: #ccc;
  --text-muted: rgba(255,255,255,0.6);
  --shadow-light: 0 4px 12px rgba(0,0,0,0.3);
  --shadow-medium: 0 8px 18px rgba(0,210,255,0.4);
  --shadow-heavy: 0 10px 25px rgba(0,0,0,0.5);
  --border-radius-sm: 6px;
  --border-radius-md: 10px;
  --border-radius-lg: 15px;
  --border-radius-xl: 20px;
  --transition-fast: 0.2s ease;
  --transition-medium: 0.3s ease-in-out;
  --transition-slow: 0.5s ease;
}

/* 🌟 Global Styles */
* {
  box-sizing: border-box;
}

body {
  font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--background-gradient);
  background-attachment: fixed;
  color: var(--text-color);
  margin: 0;
  min-height: 100vh;
  padding: 20px;
  line-height: 1.6;
   
}

/* 🌟 Accessibility */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* 🌟 Main Container */
.main-container {
  max-width: 1200px;
  margin: 0 auto;
}

/* 🌟 Tool Header */
.tool-header {
  text-align: center;
  padding: 30px;
  border: 2px solid var(--primary-color);
  border-radius: var(--border-radius-xl);
  margin-bottom: 30px;
  backdrop-filter: blur(15px);
  background: rgba(0,210,255,0.05);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-heavy);
}

.tool-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--primary-color));
  animation: shimmer 2s ease-in-out infinite;
}

.tool-header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin: 0 0 10px 0;
  color: var(--primary-color);
  text-shadow: 0 0 15px rgba(0,210,255,0.6);
}

.tool-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin: 0;
  font-weight: 400;
}

@keyframes shimmer {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* 🌟 Dual Panel Layout */
.dual-panel-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 25px;
  margin-bottom: 30px;
}

/* 🌟 Feature Panel */
.feature-panel {
  background: var(--card-background);
  padding: 30px;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-light);
  transition: var(--transition-medium);
  position: relative;
  backdrop-filter: blur(10px);
}

.feature-panel:hover {
  transform: translateY(-5px);
  background: var(--card-background-hover);
  box-shadow: var(--shadow-medium);
}

.feature-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
  opacity: 0;
  transition: var(--transition-medium);
}

.feature-panel:hover::before {
  opacity: 1;
}

/* 🌟 Panel Variations */
.checker-panel {
  border-left: 3px solid var(--info-color);
}

.generator-panel {
  border-left: 3px solid var(--secondary-color);
}

/* 🌟 Panel Header */
.panel-header {
  text-align: center;
  margin-bottom: 25px;
}

.panel-header h2 {
  font-size: 1.6rem;
  color: var(--primary-color);
  margin: 0 0 8px 0;
  font-weight: 600;
}

.panel-description {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin: 0;
}

/* 🌟 Input Section */
.input-section {
  margin-bottom: 20px;
}

/* 🌟 Input Fields */
input {
  width: 100%;
  padding: 15px;
  border-radius: var(--border-radius-md);
  border: 2px solid transparent;
  font-size: 1rem;
  outline: none;
  background: rgba(255,255,255,0.1);
  color: var(--text-color);
  transition: var(--transition-medium);
  font-family: inherit;
  margin-bottom: 15px;
}

input::placeholder {
  color: var(--text-muted);
}

input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px var(--border-color-focus);
  background: rgba(255,255,255,0.15);
  transform: translateY(-1px);
}

input.error {
  border-color: var(--error-color);
  box-shadow: 0 0 0 3px rgba(255,82,82,0.3);
  background: rgba(255,82,82,0.1);
}

input:valid:not(:placeholder-shown) {
  border-color: var(--success-color);
  background: rgba(76,175,80,0.1);
}

/* 🌟 Buttons */
button {
  width: 100%;
  padding: 15px 25px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  border: none;
  border-radius: var(--border-radius-md);
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-medium);
  position: relative;
  font-family: inherit;
  overflow: hidden;
  min-height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

button::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: var(--transition-medium);
}

button:hover:not(:disabled) {
  transform: translateY(-2px);
  background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
  box-shadow: 0 6px 20px rgba(0,210,255,0.4);
}

button:hover:not(:disabled)::before {
  left: 100%;
}

button:active:not(:disabled) {
  transform: translateY(0);
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-icon {
  font-size: 1.1rem;
}

/* 🌟 Button Loading State */
button.loading .btn-text {
  opacity: 0;
}

button.loading .btn-icon {
  display: none;
}

button.loading::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  top: 50%;
  left: 50%;
  margin-left: -10px;
  margin-top: -10px;
  border: 2px solid transparent;
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: button-loading-spinner 1s ease infinite;
}

@keyframes button-loading-spinner {
  from { transform: rotate(0turn); }
  to { transform: rotate(1turn); }
}

/* 🌟 Results Area */
.results-area {
  min-height: 60px;
  max-height: 400px;
  overflow-y: auto;
}

/* 🌟 Username Result Cards - FIXED OVERFLOW */
.username {
  background: var(--card-background);
  padding: 12px 15px;
  border-radius: var(--border-radius-md);
  margin: 10px 0;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 0.95rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-light);
  transition: var(--transition-slow);
  opacity: 0;
  transform: translateY(20px) scale(0.95);
  position: relative;
  /* FIXED: Prevent overflow */
  overflow: hidden;
  word-wrap: break-word;
}

.username.show {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.username.checking {
  opacity: 0.7;
}

.username:hover {
  transform: translateY(-2px) scale(1);
  box-shadow: var(--shadow-medium);
  border-color: var(--primary-color);
}

/* FIXED: Username text container */
.username-text {
  font-weight: 600;
  flex-grow: 1;
  text-align: left;
  word-break: break-word;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0; /* Important for flexbox text truncation */
}

/* 🌟 Status and Copy Button Container - FIXED */
.username-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  min-width: 0;
}

/* 🌟 Status Styling */
.status {
  font-weight: 700;
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  border-radius: var(--border-radius-sm);
  white-space: nowrap;
  flex-shrink: 0;
}

.status.available { 
  color: var(--success-color);
  background: rgba(76,175,80,0.1);
}

.status.taken { 
  color: var(--error-color);
  background: rgba(255,82,82,0.1);
}

.status.checking { 
  color: var(--primary-color);
  background: rgba(0,210,255,0.1);
  animation: pulse 1.5s ease-in-out infinite;
}

.status.error { 
  color: var(--warning-color);
  background: rgba(255,193,7,0.1);
}

/* 🌟 Copy Button - FIXED SIZE AND OVERFLOW */
.copy-btn {
  background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark));
  border: none;
  border-radius: var(--border-radius-sm);
  padding: 6px 10px;
  color: white;
  cursor: pointer;
  font-size: 0.75rem;
  font-weight: 600;
  transition: var(--transition-fast);
  white-space: nowrap;
  min-height: auto;
  width: auto;
  min-width: 50px;
  max-width: 70px;
  flex-shrink: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

.copy-btn:hover:not(:disabled) {
  transform: scale(1.05);
  background: linear-gradient(135deg, var(--secondary-dark), var(--secondary-color));
  box-shadow: 0 4px 12px rgba(255,106,0,0.4);
}

.copy-btn:disabled {
  opacity: 0.7;
}

/* 🌟 Help Section */
.help-section {
  margin-top: 15px;
  padding-top: 15px;
  border-top: 1px solid var(--border-color);
}

.help-text {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: left;
  display: flex;
  align-items: center;
  gap: 6px;
}

.help-icon {
  font-size: 1rem;
}

/* 🌟 Stats Dashboard */
.stats-dashboard {
  background: linear-gradient(135deg, rgba(0,210,255,0.1), rgba(255,106,0,0.1));
  border: 1px solid rgba(0,210,255,0.3);
  border-radius: var(--border-radius-lg);
  padding: 25px;
  margin-bottom: 25px;
  backdrop-filter: blur(10px);
}

.stats-dashboard h3 {
  font-size: 1.3rem;
  color: var(--primary-color);
  margin: 0 0 20px 0;
  text-align: center;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

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

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-color);
  text-shadow: 0 0 10px rgba(0,210,255,0.5);
  line-height: 1;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 5px;
  display: block;
}

/* 🌟 Info Cards */
.info-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 25px;
}

.info-card {
  background: var(--card-background);
  border-radius: var(--border-radius-md);
  padding: 20px;
  border: 1px solid var(--border-color);
  display: flex;
  gap: 15px;
  align-items: flex-start;
  transition: var(--transition-medium);
}

.info-card:hover {
  background: var(--card-background-hover);
  transform: translateY(-2px);
}

.card-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.card-content h4 {
  margin: 0 0 8px 0;
  color: var(--primary-color);
  font-size: 1rem;
}

.card-content p {
  margin: 0 0 8px 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.card-content small {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* 🌟 Feature Tags */
.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.feature-tag {
  background: rgba(0,210,255,0.1);
  color: var(--primary-color);
  padding: 3px 8px;
  border-radius: var(--border-radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
  border: 1px solid rgba(0,210,255,0.2);
  white-space: nowrap;
}

/* 🌟 Error Messages */
.error-message {
  color: var(--error-color);
  font-size: 0.9rem;
  margin-top: 10px;
  padding: 12px;
  background: rgba(255,82,82,0.1);
  border-radius: var(--border-radius-md);
  border: 1px solid rgba(255,82,82,0.3);
  border-left: 4px solid var(--error-color);
}

/* 🌟 Progress Indicator */
.progress-indicator {
  margin-top: 15px;
  padding: 12px;
  font-size: 0.9rem;
  color: var(--primary-color);
  background: rgba(0,210,255,0.1);
  border-radius: var(--border-radius-md);
  border: 1px solid rgba(0,210,255,0.2);
  text-align: center;
}

/* 🌟 Animations */
@keyframes fadeIn {
  from { 
    opacity: 0; 
    transform: translateY(10px) scale(0.95); 
  }
  to { 
    opacity: 1; 
    transform: translateY(0) scale(1); 
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* 🌟 Footer */
.footer {
  text-align: center;
  margin-top: 30px;
  padding: 25px;
  border-top: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius-lg);
  background: rgba(255,255,255,0.02);
}

.footer-content p {
  margin: 8px 0;
  color: var(--text-secondary);
}

.footer-links a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition-medium);
}

.footer-links a:hover {
  color: var(--secondary-color);
  text-shadow: 0 0 8px rgba(255, 106, 0, 0.6);
}

/* 🌟 Responsive Design */
@media (max-width: 768px) {
  .dual-panel-container {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .info-cards {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
  }
  
  .tool-header h1 {
    font-size: 2rem;
  }
  
  .feature-panel {
    padding: 25px 20px;
  }
}

@media (max-width: 480px) {
  body {
    padding: 15px;
  }
  
  .tool-header {
    padding: 20px 15px;
  }
  
  .tool-header h1 {
    font-size: 1.8rem;
  }
  
  .feature-panel {
    padding: 20px 15px;
  }
  
  .username {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    padding: 15px;
  }
  
  .username-text {
    text-align: center;
    white-space: normal;
  }
  
  .username-actions {
    justify-content: center;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .copy-btn {
    min-width: 80px;
    max-width: none;
  }
}

/* 🌟 Dark Mode Enhancements */
@media (prefers-color-scheme: dark) {
  :root {
    --card-background: rgba(255,255,255,0.12);
    --border-color: rgba(255,255,255,0.2);
  }
}

/* 🌟 Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* 🌟 High Contrast Mode */
@media (prefers-contrast: high) {
  :root {
    --border-color: rgba(255,255,255,0.8);
    --card-background: rgba(255,255,255,0.2);
  }
  
  .feature-panel {
    border-width: 2px;
  }
}
/* Light mode overrides */
[data-theme="light"] {
  --background-gradient: linear-gradient(135deg, #ffffff, #e0e0e0);
  --card-background: rgba(255, 255, 255, 0.8);
  --card-background-hover: rgba(240, 240, 240, 0.9);
  --border-color: rgba(0,0,0,0.2);
  --border-color-focus: rgba(0,0,0,0.3);
  --text-color: #111; 
  --text-secondary: #333;
  --text-muted: #555;
  --shadow-light: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-medium: 0 8px 18px rgba(0,0,0,0.15);
  --shadow-heavy: 0 10px 25px rgba(0,0,0,0.2);
}

#theme-toggle {
  position: fixed; /* absolute se fixed better, always top-right */
  top: 20px;
  right: 20px;
  z-index: 9999;
   /* sab content ke upar dikhne ke liye */
  background: none;
  border: 2px solid var(--primary-color);
  border-radius: var(--border-radius-md);
   width: auto; /* ya fixed width jaise 50px/60px */
  min-width: 50px;
  padding: 8px 12px;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--primary-color);
  transition: all 0.3s ease;
}

#theme-toggle:hover {
  background: var(--primary-color);
  color: var(--text-color);
}