.tool-ui {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.tabs-nav {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.5rem;
}

.tab-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--color-muted);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.tab-btn:hover {
  color: var(--color-snow);
}

.tab-btn.active {
  background: var(--color-accent-dim, #1E3A6E);
  color: #FFFFFF;
  border-color: var(--color-accent);
}

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

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

.field-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.field-label {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--color-snow);
}

.field-stats {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--color-muted);
}

.textarea-box {
  width: 100%;
  min-height: 140px;
  background: #0F1117;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 0.75rem;
  color: var(--color-snow);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  line-height: 1.5;
  resize: vertical;
  outline: none;
  transition: border-color 0.2s;
}

.textarea-box:focus {
  border-color: var(--color-accent);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.drop-zone {
  border: 2px dashed var(--color-border);
  border-radius: 12px;
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  background: var(--color-surface);
  transition: border-color 0.2s, background-color 0.2s;
}

.drop-zone.drag-over {
  border-color: var(--color-accent);
  background: rgba(79, 142, 247, 0.05);
}

.file-label {
  color: var(--color-accent);
  cursor: pointer;
  text-decoration: underline;
  font-weight: 500;
}

.btn-primary {
  background: var(--color-accent);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 0.6rem 1.25rem;
  font-size: 0.9rem;
  cursor: pointer;
  font-family: 'DM Sans', sans-serif;
  font-weight: 600;
  transition: opacity 0.2s;
}

.btn-primary:hover {
  opacity: 0.85;
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-snow);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 0.45rem 0.85rem;
  font-size: 0.825rem;
  cursor: pointer;
  transition: all 0.2s;
}

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

.ad-post-op {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1rem;
  font-size: 0.75rem;
  color: var(--color-muted);
  text-align: center;
}