/* ============================================
   SIDEBAR - Style cho sidebar bên trái
   Chức năng: Layout và style cho sidebar chứa form
   ============================================ */

.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

/* Drop Zone - Khu vực kéo thả logo */
.drop-zone {
  border: 2px dashed #d6e9ff;
  border-radius: var(--radius-sm);
  padding: var(--spacing-lg);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
  background: #fafbff;
}

.drop-zone:hover {
  border-color: var(--accent);
  background: #f0f6ff;
}

.drop-zone i {
  font-size: 48px;
  color: var(--accent);
  margin-bottom: var(--spacing-sm);
  opacity: 0.6;
}

.drop-zone p {
  color: var(--muted);
  font-size: var(--font-size-sm);
  margin: 0;
}

/* Template Grid - Lưới chọn template - Luôn 1 dòng */
.template-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr) !important;
  gap: 4px;
  margin-top: var(--spacing-sm);
  width: 100%;
  box-sizing: border-box;
  max-width: 100%;
  grid-auto-flow: row;
}

.template-item {
  aspect-ratio: 1;
  border: 2px solid #e6eef8;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  overflow: hidden;
}

.template-item:hover {
  border-color: var(--accent);
  transform: scale(1.05);
}

.template-item.active {
  border-color: var(--accent);
  border-width: 3px;
  box-shadow: 0 0 0 3px rgba(11, 110, 215, 0.1);
}

/* Advanced Options - Tùy chọn nâng cao */
.advanced-options {
  margin-top: var(--spacing-md);
  border-top: 1px solid #f0f6ff;
  padding-top: var(--spacing-md);
}

.advanced-toggle {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  color: var(--accent);
  font-weight: 600;
  font-size: var(--font-size-sm);
  user-select: none;
}

.advanced-toggle:hover {
  color: #0a5bb8;
}

.advanced-content {
  margin-top: var(--spacing-md);
  display: none;
}

.advanced-content.active {
  display: block;
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    width: 100%;
    max-width: 100%;
  }
  
  .drop-zone {
    padding: 30px 16px;
  }
  
  .drop-zone i {
    font-size: 36px;
  }
  
  .drop-zone p {
    font-size: 13px;
  }
  
  .template-grid {
    grid-template-columns: repeat(6, 1fr) !important;
    gap: 4px;
    grid-auto-flow: row;
  }
  
  .template-item {
    width: 40px;
    height: 40px;
    min-height: auto;
  }
  
  .advanced-toggle {
    padding: 12px;
    min-height: 44px; /* Touch-friendly */
  }
  
  @media (max-width: 480px) {
    .template-grid {
      grid-template-columns: repeat(6, 1fr) !important;
      gap: 4px;
      grid-auto-flow: row;
    }
    
    .drop-zone {
      padding: 24px 12px;
    }
  }
}