/* PromptsNote - Professional Styles */
:root {
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --secondary-color: #f8fafc;
  --accent-color: #10b981;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --border-color: #e2e8f0;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header */
.header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--primary-color);
}

.auth-button {
  background: var(--primary-color);
  color: white;
  border: none;
  padding: 0.5rem 1.5rem;
  border-radius: 0.5rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s;
}

.auth-button:hover {
  background: var(--primary-dark);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 4rem 0 2rem;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Main App */
.app-container {
  background: white;
  border-radius: 1rem;
  box-shadow: var(--shadow-lg);
  margin: 2rem auto;
  overflow: hidden;
  max-width: 1000px;
}

.app-header {
  background: var(--gradient);
  color: white;
  padding: 2rem;
  text-align: center;
}

.app-header h2 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.app-header p {
  opacity: 0.9;
  font-size: 1.1rem;
}

.app-content {
  padding: 2rem;
}

/* Category Selection */
.categories {
  margin-bottom: 2rem;
}

.categories h3 {
  margin-bottom: 1rem;
  color: var(--text-primary);
  font-size: 1.1rem;
  font-weight: 600;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.category-card {
  background: var(--secondary-color);
  border: 2px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1.5rem;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
}

.category-card:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.category-card.active {
  border-color: var(--primary-color);
  background: rgba(99, 102, 241, 0.1);
}

.category-card h4 {
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.category-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Input Section */
.input-section {
  margin-bottom: 2rem;
}

.input-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.input-textarea {
  width: 100%;
  min-height: 120px;
  padding: 1rem;
  border: 2px solid var(--border-color);
  border-radius: 0.75rem;
  font-family: inherit;
  font-size: 1rem;
  resize: vertical;
  transition: border-color 0.2s;
}

.input-textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.generate-button {
  background: var(--gradient);
  color: white;
  border: none;
  padding: 1rem 2rem;
  font-size: 1.1rem;
  font-weight: 600;
  border-radius: 0.75rem;
  cursor: pointer;
  transition: transform 0.2s;
  width: 100%;
  margin-top: 1rem;
}

.generate-button:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.generate-button:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

/* Results Section */
.results {
  margin-top: 2rem;
}

.results h3 {
  margin-bottom: 1.5rem;
  color: var(--text-primary);
  font-size: 1.2rem;
  font-weight: 600;
}

.prompt-card {
  background: white;
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1.5rem;
  margin-bottom: 1rem;
  position: relative;
  box-shadow: var(--shadow);
}

.prompt-header {
  display: flex;
  justify-content: between;
  align-items: center;
  margin-bottom: 1rem;
}

.prompt-type {
  background: var(--accent-color);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.copy-button {
  background: var(--primary-color);
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  cursor: pointer;
  transition: background-color 0.2s;
  position: absolute;
  top: 1rem;
  right: 1rem;
}

.copy-button:hover {
  background: var(--primary-dark);
}

.prompt-content {
  background: var(--secondary-color);
  padding: 1.5rem;
  border-radius: 0.5rem;
  font-family: 'SF Mono', 'Monaco', 'Cascadia Code', monospace;
  line-height: 1.6;
  white-space: pre-wrap;
  margin-top: 3rem;
}

.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  color: var(--text-secondary);
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-top: 2px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-right: 0.5rem;
}

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

/* Footer */
.footer {
  text-align: center;
  padding: 2rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .nav-links {
    display: none;
  }
  
  .category-grid {
    grid-template-columns: 1fr;
  }
  
  .app-content {
    padding: 1rem;
  }
}