.mode-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.mode-btn {
  padding: 8px 24px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color .15s, color .15s, background .15s;
}
.mode-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}
.mode-btn:hover:not(.active) { border-color: var(--text); color: var(--text); }

.mode-hint {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0 0 16px;
}

.split-opts {
  background: var(--input-bg, #f8f8f8);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  margin-bottom: 16px;
}

.split-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-bottom: 10px;
}

.split-type-row {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.split-radio {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  cursor: pointer;
}

.split-ranges-wrap { margin-top: 12px; }

.split-ranges-input {
  width: 100%;
  box-sizing: border-box;
  border: 1.5px solid var(--border);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 0.9rem;
  font-family: monospace;
  background: var(--bg);
  color: var(--text);
  outline: none;
  transition: border-color .15s;
}
.split-ranges-input:focus { border-color: var(--accent); }

.split-ranges-hint {
  font-size: 0.78rem;
  color: var(--muted);
  margin: 6px 0 0;
}

.file-reorder {
  display: flex;
  gap: 2px;
  flex-shrink: 0;
}
.file-reorder button {
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1;
  padding: 2px 5px;
  transition: color .15s, border-color .15s;
}
.file-reorder button:hover:not(:disabled) { color: var(--accent); border-color: var(--accent); }
.file-reorder button:disabled { opacity: 0.3; cursor: default; }