/* ========================================
   UI精致化样式 - pppet工具箱
   ======================================== */

/* ========================================
   1. 颜色系统和视觉层次
   ======================================== */
:root {
  --accent: #3D9A99;
  --accent-light: #5DBAB9;
  --accent-dark: #2D7A79;
  --accent-rgb: 61, 154, 153;
  
  --accent-gradient: linear-gradient(135deg, #3D9A99 0%, #2D7A79 100%);
  --accent-gradient-hover: linear-gradient(135deg, #4DAAA9 0%, #3D8A89 100%);
  --card-gradient: linear-gradient(180deg, #ffffff 0%, #fafbfc 100%);
  --nav-gradient: linear-gradient(135deg, #3D9A99 0%, #2D7A79 100%);
  
  --bg-primary: #F5F7FA;
  --bg-secondary: #EBEEF5;
  --bg-card: #ffffff;
  --bg-hover: #f0f2f5;
  
  --text-primary: #1F2937;
  --text-secondary: #6B7280;
  --text-tertiary: #9CA3AF;
  --text-inverse: #ffffff;
  
  --border-light: #E5E7EB;
  --border-medium: #D1D5DB;
  --border-focus: var(--accent);
  
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.03);
  --shadow-glow: 0 0 20px rgba(var(--accent-rgb), 0.3);
  
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  
  --duration-fast: 150ms;
  --duration-normal: 200ms;
  --duration-slow: 300ms;
  --transition-fast: all var(--duration-fast) var(--ease-out);
  --transition-normal: all var(--duration-normal) var(--ease-out);
  --transition-slow: all var(--duration-slow) var(--ease-out);
}

/* ========================================
   2. 基础样式
   ======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  font-size: 14px;
  line-height: 1.5;
  background: var(--bg-primary);
  color: var(--text-secondary);
  transition: var(--transition-normal);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ========================================  
   3. 导航栏 - 紧凑化
   ========================================
   */
.nav {
  background: var(--nav-gradient);
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 100;
}

/* 二级菜单 */
.secondary-nav {
  background: linear-gradient(180deg, var(--bg-card) 0%, #fafbfc 100%);
  border-bottom: 2px solid var(--accent);
  margin-bottom: 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  position: relative;
  overflow: hidden;
  width: 100%;
}

.secondary-nav::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-light), transparent);
  opacity: 0.5;
}

.secondary-nav-container {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 0;
  min-height: 32px;
  position: relative;
  z-index: 1;
}

.secondary-nav-item {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid transparent;
}

.secondary-nav-item span:first-child {
  font-size: 14px;
  line-height: 1;
}

.secondary-nav-item:hover span:first-child {
  transform: scale(1.05);
}

.secondary-nav-item.active span:first-child {
  transform: scale(1.08);
}

.secondary-nav-item::before {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: all 0.2s ease;
  transform: translateX(-50%);
  border-radius: 2px;
}

.secondary-nav-item:hover {
  background: rgba(var(--accent-rgb), 0.06);
  color: var(--accent);
}

.secondary-nav-item:hover::before {
  width: 60%;
}

.secondary-nav-item.active {
  background: var(--accent-gradient);
  color: var(--text-inverse);
  font-weight: 600;
}

.secondary-nav-item.active::before {
  width: 100%;
  background: rgba(255, 255, 255, 0.4);
}

.secondary-nav-item:active {
  transform: scale(0.98);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 36px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
}

.logo a {
  color: white;
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: -0.02em;
  transition: var(--transition-fast);
}

.logo a:hover {
  opacity: 0.9;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.nav-item {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.15);
  color: white;
}

.nav-item.active {
  background: rgba(255, 255, 255, 0.25);
  color: white;
  font-weight: 600;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 20px;
  cursor: pointer;
  padding: 8px;
}

/* ========================================
   4. 按钮样式
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.5;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-gradient);
  color: var(--text-inverse);
  box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-xs);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1.5px solid var(--border-medium);
  box-shadow: var(--shadow-xs);
}

.btn-secondary:hover {
  background: var(--bg-hover);
  border-color: var(--accent);
  color: var(--accent);
}

/* ========================================
   5. 表单样式
   ======================================== */
.input-field {
  width: 100%;
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--bg-card);
  border: 2px solid var(--border-light);
  border-radius: var(--radius-md);
  transition: var(--transition-normal);
  outline: none;
}

.input-field:hover {
  border-color: var(--border-medium);
}

.input-field:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.12);
}

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

textarea.input-field {
  resize: vertical;
  min-height: 100px;
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
}

/* Radio和Checkbox */
input[type="radio"],
input[type="checkbox"] {
  appearance: none;
  width: 16px;
  height: 16px;
  border: 2px solid var(--border-medium);
  background: var(--bg-card);
  cursor: pointer;
  transition: var(--transition-fast);
  vertical-align: middle;
  margin-right: 4px;
}

input[type="radio"] {
  border-radius: 50%;
}

input[type="checkbox"] {
  border-radius: 3px;
}

input[type="radio"]:checked,
input[type="checkbox"]:checked {
  background: var(--accent);
  border-color: var(--accent);
}

input[type="checkbox"]:checked::after {
  content: '';
  display: block;
  width: 4px;
  height: 8px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
  margin: 1px 0 0 4px;
}

input[type="radio"]:checked::after {
  content: '';
  display: block;
  width: 6px;
  height: 6px;
  background: white;
  border-radius: 50%;
  margin: 2px 0 0 2px;
}

/* ========================================
   6. 卡片样式 - 紧凑化
   ======================================== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: var(--transition-normal);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(var(--accent-rgb), 0.3);
}

.card:hover::before {
  opacity: 1;
}

.tool-card {
  display: block;
  text-decoration: none;
  padding: 16px;
}

.tool-card .icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
}

.tool-card:hover .icon {
  transform: scale(1.05);
}

.tool-card h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
  transition: var(--transition-fast);
}

.tool-card:hover h3 {
  color: var(--accent);
}

.tool-card p {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 8px;
}

.tool-card .tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.tool-card .tag {
  font-size: 10px;
  padding: 3px 8px;
  background: var(--bg-secondary);
  color: var(--text-tertiary);
  border-radius: var(--radius-full);
  font-weight: 500;
}

.tool-card:hover .tag {
  background: rgba(var(--accent-rgb), 0.1);
  color: var(--accent);
}

/* ========================================
   7. Cron工具样式 - 紧凑化
   ======================================== */
.cron-container {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 16px;
  margin: 0;
  border: 1px solid var(--border-light);
}

.cron-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--bg-secondary);
  flex-wrap: wrap;
  gap: 12px;
}

.cron-header h1 {
  font-size: 18px;
  color: var(--text-primary);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.quick-presets {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.preset-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 11px;
  font-weight: 500;
  transition: var(--transition-normal);
}

.preset-btn:hover {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
  transform: translateY(-1px);
}

.cron-tabs {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-light);
}

.cron-tabs .tabs-header {
  display: flex;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-light);
  overflow-x: auto;
}

.cron-tabs .tab-btn {
  padding: 10px 16px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition-normal);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

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

.cron-tabs .tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  background: var(--bg-card);
}

.cron-tabs .tab-content {
  display: none;
  padding: 12px;
  background: var(--bg-card);
}

.cron-tabs .tab-content.active {
  display: block;
}

/* Cron工具中的line和imp */
.line {
  height: 28px;
  line-height: 28px;
  margin: 4px 0;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-secondary);
}

.line input[type="text"],
.line input[type="number"] {
  padding: 4px 8px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 13px;
  width: 50px;
}

.imp {
  padding-left: 20px;
  margin: 4px 0;
  font-size: 12px;
  color: var(--text-secondary);
}

.imp input[type="checkbox"] {
  margin-right: 2px;
}

/* 结果面板 - 紧凑化 */
.result-panel {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 12px;
  margin-top: 12px;
  border: 1px solid var(--border-light);
}

.result-panel h3 {
  color: var(--text-primary);
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.result-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-bottom: 12px;
}

.result-table th,
.result-table td {
  padding: 8px 6px;
  text-align: center;
  border: 1px solid var(--border-light);
}

.result-table th {
  background: var(--bg-card);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
}

.result-table td input {
  width: 50px;
  padding: 4px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  text-align: center;
  background: var(--bg-card);
  color: var(--text-primary);
  font-family: 'SF Mono', monospace;
  font-size: 12px;
}

.cron-expression {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 12px 0;
  flex-wrap: wrap;
}

.cron-expression input {
  flex: 1;
  min-width: 180px;
  padding: 10px 14px;
  border: 2px solid var(--accent);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-family: 'SF Mono', monospace;
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: var(--shadow-xs);
}

.copy-btn {
  background: var(--accent-gradient);
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition-normal);
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
}

.copy-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.run-times {
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  padding: 10px;
  margin-top: 12px;
  border: 1px solid var(--border-light);
}

.run-times h4 {
  color: var(--text-primary);
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 8px;
  text-transform: uppercase;
}

.run-times ul {
  list-style: none;
  color: var(--accent);
}

.run-times li {
  padding: 4px 0;
  font-family: 'SF Mono', monospace;
  font-size: 12px;
  border-bottom: 1px dashed var(--border-light);
}

.run-times li:last-child {
  border-bottom: none;
}

/* ========================================
   8. 工具页面样式 - 紧凑化
   ======================================== */
.tool-container {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 16px;
  margin: 0;
  border: 1px solid var(--border-light);
}

.tool-header {
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--bg-secondary);
}

.tool-header h1 {
  font-size: 18px;
  color: var(--text-primary);
  font-weight: 700;
  margin-bottom: 4px;
}

.tool-header p {
  color: var(--text-secondary);
  font-size: 13px;
}

.tool-board {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.editor-panel {
  flex: 1;
  min-width: 280px;
}

.editor-panel h3 {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  text-transform: uppercase;
}

.editor-panel textarea {
  width: 100%;
  height: 280px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 12px;
  font-family: 'SF Mono', monospace;
  font-size: 12px;
  resize: vertical;
  background: var(--bg-card);
  color: var(--text-primary);
}

.action-panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  min-width: 100px;
}

.action-panel label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.action-panel select {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 12px;
  cursor: pointer;
}

.result-panel textarea {
  width: 100%;
  height: 280px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 12px;
  font-family: 'SF Mono', monospace;
  font-size: 12px;
  resize: vertical;
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.status-bar {
  margin-top: 12px;
  padding: 10px 14px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text-secondary);
}

.status-bar .valid {
  color: #10B981;
  font-weight: 500;
}

.status-bar .invalid {
  color: #EF4444;
  font-weight: 500;
}

/* ========================================
   9. Footer - 紧凑化
   ======================================== */
.footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border-light);
  padding: 16px 0;
  margin-top: auto;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
  text-align: center;
}

.footer-links {
  margin-bottom: 8px;
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  transition: var(--transition-fast);
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-copyright {
  font-size: 12px;
  color: var(--text-tertiary);
}

.footer-copyright a {
  color: var(--text-secondary);
  text-decoration: none;
}

/* ========================================
   10. 首页Hero - 紧凑化
   ======================================== */
.hero {
  text-align: center;
  padding: 32px 0 24px;
}

.hero h1 {
  font-size: 28px;
  color: var(--text-primary);
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.hero p {
  font-size: 14px;
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto;
}

.search-box {
  max-width: 400px;
  margin: 20px auto 0;
  position: relative;
}

.search-box input {
  width: 100%;
  padding: 12px 16px 12px 44px;
  border: 2px solid var(--border-light);
  border-radius: var(--radius-lg);
  font-size: 14px;
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.search-box input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: var(--shadow-md), 0 0 0 3px rgba(var(--accent-rgb), 0.1);
}

.search-box::before {
  content: "🔍";
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 14px;
}

.tools-section {
  padding: 24px 0;
}

.section-title {
  font-size: 16px;
  color: var(--text-primary);
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-title::before {
  content: "";
  width: 4px;
  height: 18px;
  background: var(--accent-gradient);
  border-radius: 2px;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.ai-badge {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  font-size: 9px;
  padding: 2px 6px;
  border-radius: var(--radius-full);
  margin-left: 6px;
  font-weight: 700;
}

.coming-soon {
  opacity: 0.5;
  cursor: not-allowed;
}

.coming-soon:hover {
  transform: none !important;
  border-color: var(--border-light) !important;
}

.coming-soon:hover::before {
  opacity: 0 !important;
}

.coming-soon .badge {
  background: var(--bg-secondary);
  color: var(--text-tertiary);
  font-size: 9px;
  padding: 2px 6px;
  border-radius: var(--radius-full);
  margin-left: 6px;
}

/* ========================================  
   11. 主布局 - 两列模式
   ========================================
 */

.main-layout {
  display: flex;
  gap: 24px;
  margin-top: 16px;
  margin-bottom: 40px;
}

.main-content {
  width: 100%;
  max-width: 100%;
}

.sidebar {
  flex: 3;
  min-width: 280px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sidebar-section {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 16px;
}

.sidebar-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.sidebar-title::before {
  content: "";
  width: 3px;
  height: 14px;
  background: var(--accent);
  border-radius: 2px;
}

.tool-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 -4px;
}

.tool-links li {
  flex: 1 0 calc(50% - 8px);
  margin: 0 4px;
  min-width: 120px;
}

.article-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tool-links a,
.article-links a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  font-size: 13px;
}

.tool-links a span:first-child {
  font-size: 14px;
  width: 16px;
  text-align: center;
}

.tool-links a:hover,
.article-links a:hover {
  background: var(--bg-hover);
  color: var(--accent);
}

.work-section {
  min-height: 200px;
}

.work-placeholder {
  width: 100%;
  height: 180px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  font-size: 13px;
  border: 1px dashed var(--border-medium);
}

/* 响应式设计 */
@media (max-width: 1024px) {
  .main-layout {
    gap: 20px;
  }
  
  .sidebar {
    min-width: 240px;
  }
}

@media (max-width: 768px) {
  .main-layout {
    flex-direction: column;
    gap: 20px;
  }
  
  .main-content,
  .sidebar {
    flex: 1;
    min-width: 100%;
  }
  
  .sidebar {
    order: -1;
  }
}

/* ========================================  
   12. 返回顶部按钮
   ========================================
 */
#goTop {
  cursor: pointer;
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent-gradient);
  color: white;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transition: var(--transition-normal);
  z-index: 99;
  font-size: 16px;
  border: none;
}

#goTop:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ========================================
   12. 滚动条
   ======================================== */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

/* ========================================
   13. 动画
   ======================================== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.animate-fade-in {
  animation: fadeIn var(--duration-normal) var(--ease-out);
}

/* ========================================
   14. 响应式
   ======================================== */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-card);
    box-shadow: var(--shadow-lg);
    padding: 12px;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    border-top: 1px solid var(--border-light);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .nav-item {
    color: var(--text-primary);
    width: 100%;
  }
  
  .nav-item:hover {
    background: var(--bg-hover);
    color: var(--accent);
  }
  
  .nav-item.active {
    background: var(--bg-hover);
    color: var(--accent);
  }
  
  .secondary-nav {
    margin-bottom: 0;
    padding: 0 8px;
  }
  
  .secondary-nav::before {
    display: none;
  }
  
  .secondary-nav-container {
    padding: 6px 8px;
    min-height: 32px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
    gap: 4px;
  }
  
  .secondary-nav-item {
    padding: 4px 10px;
    font-size: 12px;
    scroll-snap-align: start;
    flex-shrink: 0;
  }
  
  .secondary-nav-item span:first-child {
    font-size: 13px;
  }
  
  .secondary-nav-item::before {
    display: none;
  }
  
  .secondary-nav-item:hover {
    transform: none;
    box-shadow: none;
  }
  
  .secondary-nav-item:hover span:first-child {
    transform: none;
  }
  
  .secondary-nav-item.active {
    box-shadow: 0 2px 6px rgba(var(--accent-rgb), 0.25);
  }
  
  .secondary-nav-item.active span:first-child {
    transform: scale(1.05);
  }
  
  .nav-container {
    height: 48px;
  }
  
  .hero {
    padding: 24px 0 16px;
  }
  
  .hero h1 {
    font-size: 22px;
  }
  
  .tools-grid {
    grid-template-columns: 1fr;
  }
  
  .tool-board {
    flex-direction: column;
  }
  
  .action-panel {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: flex-start;
  }
  
  .editor-panel textarea,
  .result-panel textarea {
    height: 180px;
  }
  
  .cron-header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .quick-presets {
    width: 100%;
  }
  
  .preset-btn {
    flex: 1;
    text-align: center;
  }
  
  .cron-expression {
    flex-direction: column;
  }
  
  .cron-expression input {
    width: 100%;
  }
  
  .copy-btn {
    width: 100%;
  }
  
  .result-table th,
  .result-table td {
    padding: 6px 4px;
    font-size: 10px;
  }
  
  .result-table td input {
    width: 40px;
    font-size: 10px;
    padding: 4px;
  }
  
  .footer-links {
    flex-direction: column;
    gap: 8px;
  }
  
  #goTop {
    width: 36px;
    height: 36px;
    font-size: 14px;
    bottom: 16px;
    right: 16px;
  }
}