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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #f5f5f5;
  color: #333;
  height: 100vh;
  overflow: hidden;
}

.layout {
  display: flex;
  height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 340px;
  min-width: 340px;
  background: #fff;
  border-right: 1px solid #e0e0e0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar h1 {
  padding: 20px;
  font-size: 18px;
  color: #1a1a1a;
  border-bottom: 1px solid #e0e0e0;
}

.search-box {
  padding: 12px 16px;
  display: flex;
  gap: 8px;
}

.search-box input {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 14px;
  outline: none;
}

.search-box input:focus {
  border-color: #7c3aed;
}

.search-box button {
  padding: 8px 16px;
  background: #7c3aed;
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
}

.search-box button:hover { background: #6d28d9; }

.filters {
  padding: 8px 16px;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 4px 12px;
  border: 1px solid #ddd;
  border-radius: 20px;
  background: #fff;
  cursor: pointer;
  font-size: 12px;
  color: #666;
  transition: all 0.2s;
}

.filter-btn.active {
  background: #7c3aed;
  color: #fff;
  border-color: #7c3aed;
}

.filter-btn:hover:not(.active) {
  border-color: #7c3aed;
  color: #7c3aed;
}

.memory-count {
  padding: 4px 16px 8px;
  font-size: 12px;
  color: #999;
}

.memory-list {
  list-style: none;
  overflow-y: auto;
  flex: 1;
}

.memory-item {
  padding: 12px 16px;
  border-bottom: 1px solid #f0f0f0;
  cursor: pointer;
  transition: background 0.15s;
}

.memory-item:hover { background: #f9f5ff; }
.memory-item.active { background: #f3e8ff; border-left: 3px solid #7c3aed; }

.memory-item .name {
  font-size: 14px;
  font-weight: 500;
  color: #1a1a1a;
  margin-bottom: 4px;
}

.memory-item .desc {
  font-size: 12px;
  color: #888;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.memory-item .tag {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 10px;
  font-size: 10px;
  margin-top: 4px;
}

.tag-user { background: #dbeafe; color: #1e40af; }
.tag-project { background: #d1fae5; color: #065f46; }
.tag-feedback { background: #fef3c7; color: #92400e; }
.tag-reference { background: #e0e7ff; color: #3730a3; }
.tag-general { background: #f3f4f6; color: #374151; }

/* Content */
.content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.content-header {
  padding: 16px 24px;
  border-bottom: 1px solid #e0e0e0;
  background: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.content-header h2 {
  font-size: 16px;
  font-weight: 600;
}

.content-actions {
  display: flex;
  gap: 8px;
}

.btn {
  padding: 6px 16px;
  border: 1px solid #ddd;
  border-radius: 6px;
  background: #fff;
  cursor: pointer;
  font-size: 13px;
}

.btn:hover { background: #f5f5f5; }
.btn-primary { background: #7c3aed; color: #fff; border-color: #7c3aed; }
.btn-primary:hover { background: #6d28d9; }
.btn-danger { color: #dc2626; border-color: #fca5a5; }
.btn-danger:hover { background: #fef2f2; }

.markdown-body {
  flex: 1;
  padding: 24px;
  overflow-y: auto;
  background: #fff;
  line-height: 1.7;
}

.markdown-body h1, .markdown-body h2, .markdown-body h3 {
  margin-top: 20px;
  margin-bottom: 10px;
  color: #1a1a1a;
}

.markdown-body h2 { font-size: 20px; border-bottom: 1px solid #eee; padding-bottom: 6px; }
.markdown-body h3 { font-size: 16px; }

.markdown-body p { margin-bottom: 12px; }

.markdown-body ul, .markdown-body ol {
  margin-bottom: 12px;
  padding-left: 24px;
}

.markdown-body li { margin-bottom: 4px; }

.markdown-body table {
  border-collapse: collapse;
  margin-bottom: 16px;
  width: 100%;
}

.markdown-body th, .markdown-body td {
  border: 1px solid #ddd;
  padding: 8px 12px;
  text-align: left;
  font-size: 14px;
}

.markdown-body th { background: #f9fafb; font-weight: 600; }

.markdown-body code {
  background: #f3f4f6;
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 13px;
}

.markdown-body pre {
  background: #1e1e1e;
  color: #d4d4d4;
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  margin-bottom: 16px;
}

.markdown-body pre code {
  background: none;
  padding: 0;
  color: inherit;
}

.markdown-body strong { color: #1a1a1a; }

.markdown-body blockquote {
  border-left: 3px solid #7c3aed;
  padding-left: 16px;
  color: #666;
  margin-bottom: 12px;
}

#editor {
  width: 100%;
  flex: 1;
  padding: 24px;
  border: none;
  outline: none;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 14px;
  line-height: 1.6;
  resize: none;
  background: #fff;
}

#editMode {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.edit-actions {
  padding: 12px 24px;
  border-top: 1px solid #e0e0e0;
  display: flex;
  gap: 8px;
  background: #fff;
}

.welcome {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: #999;
  background: #fff;
}

.welcome p { font-size: 18px; }
.welcome .sub { font-size: 14px; margin-top: 8px; }

/* Loading */
.loading {
  text-align: center;
  padding: 40px;
  color: #999;
}