:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --accent: #58a6ff;
  --accent-secondary: #238636;
  --text-primary: #f0f6fc;
  --text-secondary: #8b949e;
  --border: #30363d;
  --success: #3fb950;
  --danger: #f85149;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Source Sans 3', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
}

.app-container {
  position: relative;
  background: linear-gradient(180deg, var(--bg-primary) 0%, #0a0c10 100%);
}

/* Typography */
.app-title {
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.app-subtitle {
  font-family: 'Source Sans 3', sans-serif;
  font-weight: 400;
  color: var(--text-secondary);
}

.text-accent {
  color: var(--accent);
}

/* Cards */
.settings-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
}

.main-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.prompt-card {
  background: var(--bg-secondary);
  border: 1px solid var(--accent);
  box-shadow: 0 0 20px rgba(88, 166, 255, 0.1);
}

.prompt-text {
  font-family: 'Source Sans 3', sans-serif;
  color: var(--text-primary);
  line-height: 1.7;
}

/* Form Elements */
.category-pill, .goal-pill, .exp-pill, .tone-pill {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.category-pill:hover, .goal-pill:hover, .exp-pill:hover, .tone-pill:hover {
  background: rgba(88, 166, 255, 0.1);
  border-color: var(--accent);
  color: var(--text-primary);
}

.category-pill.active, .goal-pill.active, .exp-pill.active, .tone-pill.active {
  background: rgba(88, 166, 255, 0.15);
  border-color: var(--accent);
  color: var(--accent);
}

.input-field {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-family: 'Source Sans 3', sans-serif;
  transition: all 0.2s ease;
}

.input-field:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.15);
}

.input-field::placeholder {
  color: var(--text-secondary);
}

/* Buttons */
.settings-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 1.25rem;
}

.settings-btn:hover {
  background: rgba(88, 166, 255, 0.1);
  border-color: var(--accent);
}

.generate-button {
  background: var(--accent);
  color: var(--bg-primary);
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 600;
  border: none;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all 0.2s ease;
}

.generate-button:hover {
  background: #79b8ff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(88, 166, 255, 0.3);
}

.generate-button:disabled {
  opacity: 0.7;
  cursor: wait;
}

.action-button {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.action-button:hover {
  background: rgba(88, 166, 255, 0.1);
  border-color: var(--accent);
  color: var(--accent);
}

.action-button.save {
  background: rgba(35, 134, 54, 0.15);
  border-color: var(--accent-secondary);
  color: var(--success);
}

.action-button.save:hover {
  background: rgba(35, 134, 54, 0.25);
}

.action-button.danger {
  background: rgba(248, 81, 73, 0.1);
  border-color: rgba(248, 81, 73, 0.3);
  color: var(--danger);
}

.action-button.danger:hover {
  background: rgba(248, 81, 73, 0.2);
}

/* Saved Section */
.saved-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
}

.saved-prompt-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  transition: all 0.2s ease;
}

.saved-prompt-card:hover {
  border-color: var(--accent);
}

/* Loading */
.loading-spinner {
  width: 18px;
  height: 18px;
  border: 2px solid var(--bg-primary);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Footer */
.remix-link {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.2s ease;
}

.remix-link:hover {
  background: rgba(88, 166, 255, 0.1);
  border-color: var(--accent);
  color: var(--accent);
}

.success-message {
  color: var(--success);
  animation: fadeIn 0.3s ease;
}

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

/* Utility */
.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Mobile Responsive */
@media (max-width: 640px) {
  .app-title {
    font-size: 1.75rem;
  }
  
  .app-subtitle {
    font-size: 0.9rem;
  }
  
  .category-pill {
    font-size: 0.7rem;
    padding: 0.5rem;
  }
  
  .main-card, .prompt-card {
    padding: 1.25rem;
  }
}