/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-purple: #6c5ce7;
  --primary-purple-dark: #5849c7;
  --secondary-purple: #a29bfe;
  --dark-bg: #0f0f1e;
  --dark-bg-secondary: #1a1a2e;
  --dark-bg-tertiary: #2a2a3e;
  --text-primary: #ffffff;
  --text-secondary: #b8b8d1;
  --text-muted: #7a7a9a;
  --success: #00d4aa;
  --warning: #ffa801;
  --error: #ff4757;
  --vanilla-color: #00d4aa;
  --library-color: #ffa801;
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--dark-bg);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Hero section with purple gradient */
.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 4rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><rect width="100" height="100" fill="none"/><circle cx="50" cy="50" r="1" fill="white" opacity="0.1"/></svg>');
  background-size: 50px 50px;
  opacity: 0.3;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 1rem;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.hero-tagline {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  opacity: 0.95;
  font-weight: 500;
}

.hero-subtitle {
  font-size: 1.1rem;
  opacity: 0.9;
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

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

.hero-stat-value {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--success);
}

.hero-stat-label {
  display: block;
  font-size: 0.9rem;
  opacity: 0.9;
  margin-top: 0.5rem;
}

/* Container */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Section */
.section {
  padding: 4rem 0;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
  background: linear-gradient(135deg, var(--primary-purple), var(--secondary-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Pattern grid */
.patterns-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.pattern-card {
  background: var(--dark-bg-secondary);
  border: 2px solid transparent;
  border-radius: var(--border-radius);
  padding: 1.5rem;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

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

.pattern-card:hover,
.pattern-card:focus {
  transform: translateY(-4px);
  border-color: var(--primary-purple);
  box-shadow: 0 8px 30px rgba(108, 92, 231, 0.3);
  outline: none;
}

.pattern-card:hover::before,
.pattern-card:focus::before {
  transform: scaleX(1);
}

.pattern-card:focus-visible {
  outline: 3px solid var(--primary-purple);
  outline-offset: 2px;
}

.pattern-card.active {
  border-color: var(--primary-purple);
  background: linear-gradient(135deg, rgba(108, 92, 231, 0.1), rgba(162, 155, 254, 0.05));
}

.pattern-card.active::before {
  transform: scaleX(1);
}

.pattern-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.pattern-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.pattern-stats {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.stat {
  flex: 1;
  background: var(--dark-bg-tertiary);
  padding: 0.75rem;
  border-radius: var(--border-radius-sm);
  text-align: center;
}

.stat-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-value {
  display: block;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* Playground section */
.playground-header {
  background: var(--dark-bg-secondary);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  margin-bottom: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.pattern-info h2 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.pattern-info p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.playground-controls {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--border-radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text-primary);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-purple), var(--primary-purple-dark));
  color: white;
  box-shadow: 0 4px 15px rgba(108, 92, 231, 0.4);
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(108, 92, 231, 0.5);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--dark-bg-tertiary);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: var(--dark-bg-secondary);
  transform: translateY(-2px);
}

.btn-icon {
  padding: 0.75rem;
  min-width: auto;
}

/* Editors */
.editors-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.editor-wrapper {
  background: var(--dark-bg-secondary);
  border-radius: var(--border-radius);
  overflow: hidden;
  border: 2px solid var(--dark-bg-tertiary);
  transition: var(--transition);
}

.editor-wrapper:hover {
  border-color: var(--primary-purple);
}

.editor-header {
  background: var(--dark-bg-tertiary);
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.editor-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.editor-size {
  background: var(--dark-bg);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--success);
}

.editor-container {
  height: 500px;
  position: relative;
}

/* Console */
.console-container {
  background: var(--dark-bg-secondary);
  border-radius: var(--border-radius);
  overflow: hidden;
  border: 2px solid var(--dark-bg-tertiary);
}

.console-header {
  background: var(--dark-bg-tertiary);
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.console-header h3 {
  font-size: 0.95rem;
  font-weight: 600;
}

#console-output {
  height: 400px;
  overflow-y: auto;
  padding: 1rem;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 0.9rem;
  background: var(--dark-bg);
}

.console-empty {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  text-align: center;
  padding: 2rem;
}

.console-empty-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.console-message {
  padding: 0.5rem;
  margin-bottom: 0.5rem;
  border-radius: var(--border-radius-sm);
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.console-icon {
  flex-shrink: 0;
  font-size: 1.1rem;
}

.console-side-badge {
  flex-shrink: 0;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.side-vanilla .console-side-badge {
  background: rgba(0, 212, 170, 0.2);
  color: var(--vanilla-color);
}

.side-library .console-side-badge {
  background: rgba(255, 168, 1, 0.2);
  color: var(--library-color);
}

.console-text {
  flex: 1;
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: inherit;
}

.console-log {
  background: rgba(255, 255, 255, 0.05);
}

.console-error {
  background: rgba(255, 71, 87, 0.1);
  border-left: 3px solid var(--error);
}

.console-warn {
  background: rgba(255, 168, 1, 0.1);
  border-left: 3px solid var(--warning);
}

.console-info {
  background: rgba(108, 92, 231, 0.1);
  border-left: 3px solid var(--primary-purple);
}

/* Performance message */
.performance-message {
  background: linear-gradient(135deg, rgba(108, 92, 231, 0.1), rgba(162, 155, 254, 0.1));
  border: 2px solid var(--primary-purple);
  border-radius: var(--border-radius);
  padding: 1rem;
  margin: 1rem 0;
  animation: fadeIn 0.5s ease;
}

.performance-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.performance-icon {
  font-size: 1.5rem;
}

.performance-title {
  font-weight: 700;
  font-size: 1.1rem;
}

.performance-details {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.performance-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem;
  background: var(--dark-bg-tertiary);
  border-radius: var(--border-radius-sm);
}

.performance-row.highlight {
  background: linear-gradient(135deg, rgba(0, 212, 170, 0.2), rgba(0, 212, 170, 0.1));
  border: 1px solid var(--success);
  font-weight: 700;
}

.performance-row .label {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.performance-row .value {
  font-weight: 600;
  font-size: 1rem;
}

.performance-row .value.faster {
  color: var(--success);
}

/* Scrollbar styling */
#console-output::-webkit-scrollbar {
  width: 8px;
}

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

#console-output::-webkit-scrollbar-thumb {
  background: var(--dark-bg-tertiary);
  border-radius: 4px;
}

#console-output::-webkit-scrollbar-thumb:hover {
  background: var(--primary-purple);
}

/* Toast notification */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--dark-bg-secondary);
  color: var(--text-primary);
  padding: 1rem 1.5rem;
  border-radius: var(--border-radius-sm);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
  transform: translateY(100px);
  opacity: 0;
  transition: var(--transition);
  z-index: 1000;
  border: 2px solid var(--success);
}

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

.toast-success {
  border-color: var(--success);
}

.toast-error {
  border-color: var(--error);
  background: rgba(255, 71, 87, 0.1);
}

.toast-warning {
  border-color: var(--warning);
  background: rgba(255, 168, 1, 0.1);
}

/* About section */
.about-section {
  background: var(--dark-bg-secondary);
  padding: 4rem 2rem;
  text-align: center;
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
}

.about-section h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

.about-section p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 1.1rem;
  line-height: 1.8;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.feature {
  text-align: center;
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.feature h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.feature p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Footer */
.footer {
  background: var(--dark-bg);
  padding: 2rem;
  text-align: center;
  border-top: 1px solid var(--dark-bg-tertiary);
}

.footer p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer a {
  color: var(--primary-purple);
  text-decoration: none;
  transition: var(--transition);
}

.footer a:hover {
  color: var(--secondary-purple);
}

/* Responsive design */
@media (max-width: 968px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero-tagline {
    font-size: 1.25rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .editors-container {
    grid-template-columns: 1fr;
  }

  .editor-container {
    height: 400px;
  }

  #console-output {
    height: 300px;
  }

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

  .hero-stats {
    gap: 1.5rem;
  }

  .patterns-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .hero {
    padding: 3rem 1.5rem;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .section {
    padding: 2rem 0;
  }

  .container {
    padding: 0 1rem;
  }

  .playground-controls {
    width: 100%;
  }

  .playground-controls .btn {
    flex: 1;
    justify-content: center;
    padding: 0.875rem 1rem; /* Larger touch targets */
    font-size: 0.9rem;
  }

  .btn-icon {
    min-width: 44px; /* Minimum touch target size */
    min-height: 44px;
    padding: 0.75rem;
  }

  .hero-stats {
    flex-direction: column;
    gap: 1rem;
  }

  .toast {
    right: 1rem;
    left: 1rem;
    bottom: 1rem;
  }

  .editor-container {
    height: 350px; /* Slightly shorter on mobile */
  }

  .pattern-card {
    padding: 1.25rem; /* Slightly smaller padding on mobile */
  }

  /* Ensure text is readable on mobile */
  body {
    font-size: 15px;
  }
}

/* Loading state */
.loading {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.loading-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 15, 30, 0.95);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 100;
  border-radius: var(--border-radius);
}

.loading-spinner {
  width: 3rem;
  height: 3rem;
  border: 4px solid rgba(108, 92, 231, 0.2);
  border-top-color: var(--primary-purple);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loading-overlay p {
  margin-top: 1rem;
  color: var(--text-secondary);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Utility classes */
.text-center {
  text-align: center;
}

.mt-2 {
  margin-top: 2rem;
}

.mb-2 {
  margin-bottom: 2rem;
}

.hidden {
  display: none;
}