/* Claude-inspired Design System */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Primary */
  --color-near-black: #141413;
  --color-terracotta: #c96442;
  --color-coral: #d97757;

  /* Surface & Background */
  --color-parchment: #f5f4ed;
  --color-ivory: #faf9f5;
  --color-white: #ffffff;
  --color-warm-sand: #e8e6dc;
  --color-dark-surface: #30302e;

  /* Neutrals & Text */
  --color-charcoal-warm: #4d4c48;
  --color-olive-gray: #5e5d59;
  --color-stone-gray: #87867f;
  --color-warm-silver: #b0aea5;

  /* Borders */
  --color-border-cream: #f0eee6;
  --color-border-warm: #e8e6dc;
  --color-ring-warm: #d1cfc5;

  /* Fonts */
  --font-serif: Georgia, 'Times New Roman', Times, serif;
  --font-sans: Arial, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Theme tokens */
  --bg-page: #f5f4ed;
  --bg-card: #faf9f5;
  --bg-nav: rgba(245, 244, 237, 0.92);
  --text-primary: #141413;
  --text-secondary: #5e5d59;
  --text-tertiary: #87867f;
  --border-color: #f0eee6;
  --brand-accent: #c96442;
  --transition: all 0.2s ease;
}

body {
  background: var(--bg-page);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.60;
  -webkit-font-smoothing: antialiased;
}

/* ============================================
   Header
   ============================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-nav);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--brand-accent);
  border-radius: 10px;
  color: var(--color-ivory);
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 500;
}

.header-title {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.20;
}

/* ============================================
   Layout
   ============================================ */
.layout {
  display: flex;
  min-height: calc(100vh - 68px);
}

/* ============================================
   Sidebar
   ============================================ */
.sidebar {
  width: 300px;
  background: var(--bg-card);
  border-right: 1px solid var(--border-color);
  padding: 24px;
  position: sticky;
  top: 68px;
  height: calc(100vh - 68px);
  overflow-y: auto;
}

.search-container {
  margin-bottom: 24px;
}

.search-input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  font-family: var(--font-sans);
  font-size: 15px;
  background: var(--bg-page);
  color: var(--text-primary);
  transition: var(--transition);
}

.search-input:focus {
  outline: none;
  border-color: var(--brand-accent);
  box-shadow: var(--brand-accent) 0px 0px 0px 3px;
}

.search-input::placeholder {
  color: var(--text-tertiary);
}

.categories-title {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  margin-bottom: 12px;
}

.category-list {
  list-style: none;
}

.category-item {
  margin-bottom: 4px;
}

.category-btn {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  background: transparent;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 400;
  color: var(--text-secondary);
  text-align: left;
}

.category-btn:hover {
  background: var(--color-warm-sand);
  color: var(--text-primary);
}

.category-btn.active {
  background: var(--brand-accent);
  color: var(--color-ivory);
  font-weight: 500;
}

.category-btn .count {
  font-size: 13px;
  font-weight: 500;
  opacity: 0.7;
}

/* ============================================
   Main Content
   ============================================ */
.main-content {
  flex: 1;
  padding: 24px 40px;
  overflow-y: auto;
}

/* Toolbar - 主题切换和结果信息 */
.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.results-info {
  color: var(--text-secondary);
  font-size: 15px;
  font-family: var(--font-sans);
}

/* Theme Toggle - 新设计 */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--color-warm-sand);
  color: var(--color-charcoal-warm);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
}

.theme-toggle:hover {
  border-color: var(--brand-accent);
}

.theme-toggle .theme-icon {
  font-size: 16px;
  line-height: 1;
}

.theme-toggle .theme-label {
  color: var(--text-secondary);
}

/* Theme Toggle Pills */
.theme-toggle-pills {
  display: flex;
  background: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 4px;
  gap: 4px;
}

.theme-pill {
  padding: 8px 16px;
  background: transparent;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.theme-pill:hover {
  color: var(--text-primary);
}

.theme-pill.active {
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: var(--color-ring-warm) 0px 0px 0px 1px;
}

.theme-pill svg {
  width: 16px;
  height: 16px;
}

/* ============================================
   Designs Grid
   ============================================ */
.designs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.design-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition);
}

.design-card:hover {
  box-shadow: var(--color-ring-warm) 0px 0px 0px 1px,
              rgba(20, 20, 19, 0.06) 0px 4px 8px;
  transform: translateY(-2px);
}

.card-preview {
  height: 180px;
  background: var(--bg-page);
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border-color);
}

.card-preview iframe {
  width: 200%;
  height: 200%;
  border: none;
  pointer-events: none;
  transform: scale(0.5);
  transform-origin: top left;
}

.card-info {
  padding: 20px;
}

.card-category {
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--brand-accent);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.card-name {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.30;
}

.card-description {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.50;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-colors {
  padding: 0 20px 16px;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.color-swatch {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid var(--bg-card);
  box-shadow: var(--border-color) 0px 0px 0px 1px;
}

/* ============================================
   Modal
   ============================================ */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1000;
}

.modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(20, 20, 19, 0.5);
  backdrop-filter: blur(8px);
}

.modal-content {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  width: 85%;
  max-width: 1400px;
  height: 85vh;
  min-height: 450px;
  display: flex;
  flex-direction: column;
  box-shadow: rgba(20, 20, 19, 0.15) 0px 25px 50px -12px;
  overflow: hidden;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.modal-title {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.20;
}

.modal-close {
  width: 36px;
  height: 36px;
  border: none;
  background: var(--color-warm-sand);
  border-radius: 10px;
  cursor: pointer;
  font-size: 20px;
  color: var(--color-charcoal-warm);
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.modal-close:hover {
  background: var(--brand-accent);
  color: var(--color-ivory);
}

/* ============================================
   Modal Body - 左右布局
   ============================================ */
.modal-body {
  flex: 1;
  display: flex;
  min-height: 0;
  overflow: hidden;
}

/* 左侧 Tab 导航 */
.modal-tabs {
  width: 160px;
  padding: 12px;
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex-shrink: 0;
  background: var(--bg-page);
  border-radius: 0 0 0 20px;
}

.tab-btn {
  width: 100%;
  padding: 12px 14px;
  background: transparent;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  text-align: left;
  display: flex;
  align-items: center;
  gap: 10px;
}

.tab-btn:hover {
  background: var(--bg-card);
  color: var(--text-primary);
}

.tab-btn.active {
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: var(--color-ring-warm) 0px 0px 0px 1px;
}

.tab-btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* 右侧内容区域 */
.modal-content-area {
  flex: 1;
  padding: 20px;
  overflow: hidden;
  min-width: 0;
}

.tab-content {
  display: none;
  height: 100%;
  overflow-y: auto;
}

.tab-content.active {
  display: flex;
  flex-direction: column;
}

/* Preview tab 不需要容器滚动条，iframe 自己有滚动条 */
#tabPreview {
  overflow: hidden;
}

#tabPreview.active {
  display: flex;
}

/* Preview iframe 填满容器 */
#tabPreview .preview-iframe {
  flex: 1;
  min-height: 0;
}

/* ============================================
   Preview Tab
   ============================================ */
.preview-iframe {
  width: 100%;
  height: 100%;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--bg-page);
}

/* ============================================
   Colors Tab
   ============================================ */
.colors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}

.color-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: 12px;
}

.color-preview {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  flex-shrink: 0;
}

.color-info {
  flex: 1;
  min-width: 0;
}

.color-name {
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--text-tertiary);
  margin-bottom: 2px;
  word-break: break-all;
}

.color-value {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
}

/* ============================================
   Fonts Tab
   ============================================ */
.fonts-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.font-card {
  padding: 20px 24px;
  background: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: 12px;
}

.font-name {
  font-family: var(--font-sans);
  font-size: 11px;
  color: var(--text-tertiary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.font-value {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.30;
}

.font-sample {
  margin-top: 12px;
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.60;
}

/* ============================================
   Design.md Tab
   ============================================ */
.design-md-content {
  background: var(--bg-page);
  padding: 24px 28px;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  white-space: pre-wrap;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.70;
  color: var(--text-primary);
  overflow-x: auto;
}

/* ============================================
   Empty State
   ============================================ */
.empty-state {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 32px;
  color: var(--text-tertiary);
}

.empty-state-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  color: var(--text-tertiary);
  opacity: 0.6;
}

.empty-state-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

.empty-state-text {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.60;
  text-align: center;
  color: var(--text-tertiary);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 900px) {
  .header {
    padding: 14px 20px;
  }

  .layout {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    height: auto;
    position: static;
    padding: 20px;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }

  .category-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }

  .category-item {
    margin: 0;
  }

  .category-btn {
    padding: 8px 14px;
    font-size: 14px;
  }

  .main-content {
    padding: 20px;
  }

  .toolbar {
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }

  .designs-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .modal-content {
    width: 100%;
    height: 100vh;
    min-height: 100vh;
    border-radius: 0;
  }

  .modal-header {
    padding: 16px;
  }

  .modal-title {
    font-size: 20px;
  }

  .modal-body {
    flex-direction: column;
  }

  .modal-tabs {
    width: 100%;
    flex-direction: row;
    flex-wrap: wrap;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    border-radius: 0;
  }

  .tab-btn {
    width: auto;
  }

  .modal-content-area {
    padding: 16px;
  }
}