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

:root {
  --bg-primary: #0a0a0b;
  --bg-secondary: #111113;
  --bg-tertiary: #18181b;
  --border-color: #27272a;
  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --accent-primary: #10b981;
  --accent-secondary: #059669;
  --accent-glow: rgba(16, 185, 129, 0.15);
  --error-color: #ef4444;
  --warning-color: #f59e0b;
  --info-color: #3b82f6;
}

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

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.logo svg {
  color: var(--accent-primary);
}

.logo h1 {
  font-size: 1.75rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
}

.main-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  flex: 1;
}

@media (max-width: 1024px) {
  .main-content {
    grid-template-columns: 1fr;
  }
}

.code-section,
.analysis-section {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-tertiary);
}

.section-header h2 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

#languageSelect {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}

#languageSelect:hover {
  border-color: var(--text-muted);
}

#languageSelect:focus {
  outline: none;
  border-color: var(--accent-primary);
}

.code-editor-wrapper {
  display: flex;
  flex: 1;
  min-height: 400px;
  overflow: hidden;
}

.line-numbers {
  background-color: var(--bg-tertiary);
  padding: 1rem 0.75rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--text-muted);
  text-align: right;
  user-select: none;
  border-right: 1px solid var(--border-color);
  min-width: 3rem;
  overflow: hidden;
  white-space: pre;
}

#codeInput {
  flex: 1;
  background-color: var(--bg-secondary);
  border: none;
  padding: 1rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--text-primary);
  resize: none;
  outline: none;
  overflow-y: auto;
}

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

.actions {
  display: flex;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-tertiary);
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: var(--bg-primary);
}

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

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

.btn-secondary {
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

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

.btn-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(0, 0, 0, 0.3);
  border-top-color: var(--bg-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.analysis-content {
  flex: 1;
  padding: 1.5rem;
  overflow-y: auto;
  min-height: 400px;
}

.placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  text-align: center;
  color: var(--text-muted);
  gap: 1rem;
}

.placeholder svg {
  opacity: 0.5;
}

.placeholder p {
  max-width: 280px;
  font-size: 0.9rem;
  line-height: 1.5;
}

.loading-indicator {
  display: none;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent-primary);
  font-size: 0.85rem;
}

.loading-indicator.active {
  display: flex;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--border-color);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loading-message {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  text-align: center;
  color: var(--text-secondary);
  gap: 1rem;
}

.loading-message p {
  font-size: 1rem;
}

.loading-message small {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.analysis-result {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.analysis-result strong {
  color: var(--text-primary);
  font-weight: 600;
}

.analysis-result em {
  color: var(--warning-color);
}

.analysis-result code {
  background-color: var(--bg-tertiary);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85em;
  color: var(--accent-primary);
}

.analysis-result pre {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  margin: 1rem 0;
  overflow-x: auto;
}

.analysis-result pre code {
  background: none;
  padding: 0;
  color: var(--text-primary);
}

.error-box {
  background-color: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: 8px;
  padding: 1rem;
  color: var(--error-color);
}

.error-box h4 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

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

.error-box small {
  display: block;
  margin-top: 0.5rem;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.error-box code {
  background-color: var(--bg-tertiary);
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85em;
}

.footer {
  text-align: center;
  padding-top: 2rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

@media (max-width: 640px) {
  .container {
    padding: 1rem;
  }

  .logo h1 {
    font-size: 1.5rem;
  }

  .actions {
    flex-direction: column;
  }

  .btn-primary,
  .btn-secondary {
    justify-content: center;
  }
}