.tool-btn {
  position: relative;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  width: 44px;
  height: 44px;
  border-radius: 12px;
  cursor: pointer;
  font-family: var(--font-ui);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s ease;
}

.tool-btn-icon {
  font-size: 1.4rem;
  transition: transform 0.2s ease;
}

.tool-btn:hover {
  background: var(--panel);
  border-color: var(--text);
}

.tool-btn.active .tool-btn-icon {
  transform: rotate(45deg);
}

.tool-btn.active {
  background: #111827;
  color: #ffffff;
  border-color: #111827;
}

.tool-btn.has-selection:not(.active) {
  border-color: #111827;
  background: #f9fafb;
}

.tool-badge {
  position: absolute;
  top: -6px;
  right: -6px;
  background: #ef4444;
  color: #ffffff;
  font-size: 0.7rem;
  font-weight: 700;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid #ffffff;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.tools-container {
  position: relative;
  display: flex;
  align-items: center;
}

.tools-box {
  position: absolute;
  bottom: calc(100% + 12px);
  left: 0;
  width: 360px;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 16px;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 12px;
  animation: slideUp 0.2s ease-out;
  max-height: 70vh;
  overflow-y: auto;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.tools-box-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.tools-box-header h3 {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

.clear-btn {
  background: transparent;
  color: #6b7280;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 4px 8px;
  border-radius: 6px;
  border: 1px solid transparent;
  transition: all 0.2s ease;
}

.clear-btn:hover {
  background: #f3f4f6;
  color: #111827;
  border-color: var(--border);
}

.tools-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  max-height: 240px;
  overflow-y: auto;
}

.tool-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: transparent;
  text-align: left;
  cursor: pointer;
  transition: all 0.2s ease;
}

.tool-item:hover {
  background: var(--panel);
  border-color: var(--text);
}

.tool-item.selected {
  background: #f3f4f6;
  border-color: #111827;
}

.tool-item-name {
  font-weight: 600;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 6px;
}

.tool-item-name::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--border);
}

.tool-item.selected .tool-item-name::before {
  background: #111827;
}

.tool-item-desc {
  font-size: 0.75rem;
  color: var(--muted);
  line-height: 1.3;
}

.selected-count {
  font-size: 0.75rem;
  background: #111827;
  color: #ffffff;
  padding: 2px 6px;
  border-radius: 999px;
}

@media (max-width: 900px) {
  .tools-box {
    width: calc(100vw - 32px) !important;
    left: 0 !important;
    padding: 12px !important;
    max-height: 50vh;
  }

  .tools-box-header h3 {
    font-size: 0.8rem !important;
  }

  .tool-item {
    padding: 8px !important;
  }

  .tool-item-name {
    font-size: 0.78rem !important;
  }

  .tool-item-desc {
    font-size: 0.68rem !important;
  }

  .tool-btn {
    width: 38px !important;
    height: 38px !important;
    border-radius: 10px !important;
  }

  .tool-btn-icon {
    font-size: 1.2rem !important;
  }
}