:root {
  --bg-primary: #0f0f0f;
  --bg-secondary: #1a1a1a;
  --bg-tertiary: #252525;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --error: #ef4444;
  --success: #22c55e;
  --border-radius: 12px;
  --transition: 0.2s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
}

.container {
  max-width: 600px;
  margin: 0 auto;
  padding: 2rem 1rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  text-align: center;
  margin-bottom: 2rem;
}

h1 {
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-top: 0.25rem;
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-row {
  display: flex;
  gap: 1rem;
}

.form-row .half {
  flex: 1;
}

label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

textarea,
select {
  width: 100%;
  padding: 0.875rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--bg-tertiary);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
}

textarea:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

textarea::placeholder {
  color: var(--text-secondary);
  opacity: 0.6;
}

select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23a0a0a0' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.quality-buttons {
  display: flex;
  gap: 0.5rem;
}

.quality-btn {
  flex: 1;
  padding: 0.75rem 0.5rem;
  background: var(--bg-secondary);
  border: 1px solid var(--bg-tertiary);
  border-radius: var(--border-radius);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}

.quality-btn:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}

.quality-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.char-count {
  text-align: right;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.char-count.warning {
  color: var(--error);
}

.btn-primary {
  width: 100%;
  padding: 1rem;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

.btn-primary:active:not(:disabled) {
  transform: scale(0.98);
}

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

.btn-secondary {
  width: 100%;
  padding: 0.875rem;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--bg-tertiary);
  border-radius: var(--border-radius);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
}

.btn-secondary:hover {
  background: var(--bg-secondary);
  border-color: var(--accent);
}

.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.status {
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-left: 3px solid var(--accent);
}

.result {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.image-container {
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  overflow: hidden;
  position: relative;
}

.image-container img {
  width: 100%;
  height: auto;
  display: block;
}

.prompt-used {
  padding: 0.75rem 1rem;
  background: var(--bg-tertiary);
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-style: italic;
  border-top: 1px solid var(--bg-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.error {
  padding: 1rem;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--error);
  border-radius: var(--border-radius);
  color: var(--error);
  font-size: 0.9rem;
  text-align: center;
}

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

.suggestions-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip {
  padding: 0.5rem 0.875rem;
  background: var(--bg-secondary);
  border: 1px solid var(--bg-tertiary);
  border-radius: 20px;
  color: var(--text-secondary);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--transition);
}

.chip:hover {
  background: var(--bg-tertiary);
  border-color: var(--accent);
  color: var(--text-primary);
}

footer {
  margin-top: 2rem;
  text-align: center;
  padding-top: 1.5rem;
  border-top: 1px solid var(--bg-tertiary);
}

footer p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

@media (max-width: 480px) {
  .container {
    padding: 1.5rem 1rem;
  }

  h1 {
    font-size: 1.75rem;
  }

  .form-row {
    flex-direction: column;
    gap: 1rem;
  }

  .quality-btn {
    padding: 0.625rem 0.5rem;
    font-size: 0.8rem;
  }
}