/*
 * YouTube工具集 - Persona 5 Refined 设计系统
 * "Take Your Heart" - 为数据分析注入叛逆美学
 * 
 * 设计理念：
 * - 保留P5标志性的红黑配色和斜切边框
 * - 优化数据可读性和长时间使用体验
 * - 统一三个工具的视觉语言
 * - 减少装饰性元素，强化功能性
 */

/* ========================================
   配色系统 - Persona 5 Palette (Refined)
   ======================================== */
:root {
  /* 主色 - Phantom Red */
  --p5-red: #E60012;
  --p5-red-dark: #C70010;
  --p5-red-darker: #8B0000;
  --p5-red-light: #FF1744;
  --p5-red-glow: rgba(230, 0, 18, 0.3);
  
  /* 黑色系统 */
  --p5-black: #000000;
  --p5-black-soft: #0A0A0A;
  --p5-black-panel: #141414;
  --p5-black-card: #1A1A1A;
  
  /* 灰色系统 - 优化对比度 */
  --p5-gray-darkest: #1F1F1F;
  --p5-gray-darker: #2A2A2A;
  --p5-gray-dark: #3A3A3A;
  --p5-gray: #555555;
  --p5-gray-light: #777777;
  --p5-gray-lighter: #AAAAAA;
  --p5-gray-lightest: #CCCCCC;
  
  /* 白色系统 - 提升可读性 */
  --p5-white: #FFFFFF;
  --p5-white-soft: #F5F5F5;
  --p5-white-muted: rgba(255, 255, 255, 0.85);
  
  /* 强调色 */
  --p5-yellow: #FFD700;
  --p5-yellow-bright: #FFED4E;
  --p5-green: #00FF41;
  
  /* 语义色 */
  --p5-success: #00FF41;
  --p5-warning: #FFD700;
  --p5-error: #E60012;
  
  /* 透明度 */
  --p5-overlay: rgba(0, 0, 0, 0.85);
  --p5-glass: rgba(255, 255, 255, 0.05);
  
  /* 阴影系统 */
  --p5-shadow-sm: 4px 4px 0px rgba(230, 0, 18, 0.3);
  --p5-shadow-md: 6px 6px 0px rgba(230, 0, 18, 0.4);
  --p5-shadow-lg: 8px 8px 0px rgba(230, 0, 18, 0.5);
  --p5-shadow-glow: 0 0 20px rgba(230, 0, 18, 0.6);
  --p5-shadow-dark: 4px 4px 12px rgba(0, 0, 0, 0.8);
  
  /* 边框 */
  --p5-border: 1px solid rgba(230, 0, 18, 0.3);
  --p5-border-thick: 2px solid rgba(230, 0, 18, 0.5);
  --p5-border-thin: 1px solid rgba(230, 0, 18, 0.2);
  --p5-border-gray: 1px solid var(--p5-gray-dark);
  
  /* 间距系统 - 8px grid */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  
  /* 圆角 - 更柔和的设计 */
  --radius-none: 0;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  
  /* 动画时长 */
  --transition-fast: 0.15s;
  --transition-normal: 0.3s;
  --transition-slow: 0.5s;
  --transition-base: 0.2s;
  
  /* 字体 */
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
  --font-display: 'Inter', 'Arial Black', sans-serif;
}

/* ========================================
   基础重置
   ======================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-main);
  background: var(--p5-black);
  color: var(--p5-white);
  line-height: 1.6;
  min-height: 100vh;
  font-size: 14px;
  overflow-x: hidden;
  padding: var(--space-4);
}

/* 背景纹理 - 轻微 */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(255, 255, 255, 0.008) 2px,
    rgba(255, 255, 255, 0.008) 4px
  );
  pointer-events: none;
  z-index: 1;
}

/* 对角线装饰 */
body::after {
  content: '';
  position: fixed;
  top: -50%;
  right: -20%;
  width: 150%;
  height: 200%;
  background: linear-gradient(
    135deg,
    transparent 0%,
    transparent 48%,
    var(--p5-red-glow) 48%,
    var(--p5-red-glow) 48.5%,
    transparent 48.5%,
    transparent 100%
  );
  pointer-events: none;
  z-index: 0;
  opacity: 0.12;
}

/* ========================================
   容器系统
   ======================================== */
.container {
  max-width: 1400px;
  margin: 0 auto;
  background: transparent;
  position: relative;
  z-index: 2;
}

/* ========================================
   顶部导航栏
   ======================================== */
.top-nav {
  background: var(--p5-black-panel);
  border-bottom: var(--p5-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  margin-bottom: var(--space-6);
}

.top-nav .nav-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 24px;
  position: relative;
}

.top-nav .logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--p5-red);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-family: var(--font-display);
}

.top-nav .logo a {
  color: var(--p5-red);
  text-decoration: none;
  transition: all var(--transition-base);
}

.top-nav .logo a:hover {
  color: var(--p5-red-light);
  text-shadow: 0 0 8px var(--p5-red-glow);
}

.top-nav .nav-menu ul {
  display: flex;
  list-style: none;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.top-nav .nav-menu li a {
  display: block;
  padding: 8px 16px;
  color: var(--p5-white);
  font-weight: 600;
  font-size: 13px;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.top-nav .nav-menu li a::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--p5-red);
  opacity: 0;
  transition: opacity var(--transition-base);
  z-index: -1;
}

.top-nav .nav-menu li a:hover::before,
.top-nav .nav-menu li a.active::before {
  opacity: 0.15;
}

.top-nav .nav-menu li a:hover,
.top-nav .nav-menu li a.active {
  color: var(--p5-white);
  border-color: var(--p5-red-light);
  text-shadow: 0 0 8px rgba(255, 255, 255, 0.8);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: transparent;
  border: none;
}

.mobile-menu-btn span {
  width: 24px;
  height: 3px;
  background: var(--p5-red);
  transition: all var(--transition-base);
  border-radius: 2px;
}

.mobile-menu-btn:hover span {
  background: var(--p5-red-light);
  box-shadow: 0 0 8px var(--p5-red-glow);
}

/* ========================================
   头部系统
   ======================================== */
.header {
  background: var(--p5-black-panel);
  border: var(--p5-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-6);
  text-align: center;
  margin-bottom: var(--space-6);
  position: relative;
}

.header h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--p5-white);
  margin-bottom: var(--space-2);
  letter-spacing: -0.3px;
  font-family: var(--font-display);
  position: relative;
  display: inline-block;
}

.header h1::after {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: -6px;
  width: 40%;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, var(--p5-red) 50%, transparent 100%);
}

.header p {
  font-size: 13px;
  color: var(--p5-gray-lighter);
  font-weight: 400;
}

/* ========================================
   卡片/区块系统
   ======================================== */
.card,
.config-section,
.filter-section,
.results-section,
.toolbar,
.selection-toolbar,
.channel-links-section,
.stats-bar,
.filter-bar,
.table-container {
  background: var(--p5-black-card);
  border: var(--p5-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  margin-bottom: var(--space-5);
  position: relative;
  transition: all var(--transition-normal) ease;
}

/* ========================================
   标题系统
   ======================================== */
h2,
h3,
.section-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--p5-white);
  margin-bottom: var(--space-4);
  letter-spacing: 0.3px;
  position: relative;
  padding-left: var(--space-4);
}

h2::before,
h3::before,
.section-title::before {
  content: '▶';
  position: absolute;
  left: 0;
  color: var(--p5-red);
  font-size: 12px;
}

/* ========================================
   按钮系统
   ======================================== */
.btn,
button:not(.tag-clear-btn):not(.modal-close):not(.context-menu-item) {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 8px 16px;
  background: var(--p5-red);
  color: var(--p5-white);
  border: 1px solid var(--p5-red);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font-main);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-fast) ease;
  white-space: nowrap;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transition: left var(--transition-normal) ease;
}

.btn:hover,
button:not(.tag-clear-btn):not(:disabled):hover {
  background: var(--p5-red-light);
  border-color: var(--p5-red-light);
  box-shadow: var(--p5-shadow-sm), 0 0 20px var(--p5-red-glow);
  transform: translateY(-2px);
}

.btn:hover::before {
  left: 100%;
}

.btn:active {
  transform: translateY(0);
}

.btn:disabled,
button:disabled {
  background: var(--p5-gray);
  border-color: var(--p5-gray);
  cursor: not-allowed;
  opacity: 0.5;
}

/* 按钮变体 */
.btn-primary {
  background: var(--p5-red);
  border-color: var(--p5-red);
}

.btn-secondary {
  background: transparent;
  color: var(--p5-white);
  border-color: var(--p5-red);
}

.btn-secondary:hover {
  background: var(--p5-red);
  color: var(--p5-white);
}

.btn-success {
  background: var(--p5-success);
  border-color: var(--p5-success);
  color: var(--p5-black);
}

.btn-success:hover {
  box-shadow: 0 0 20px rgba(0, 255, 65, 0.6);
}

.btn-danger {
  background: var(--p5-red-dark);
  border-color: var(--p5-red-dark);
}

.btn-warning {
  background: var(--p5-yellow);
  border-color: var(--p5-yellow);
  color: var(--p5-black);
}

.btn-analyze {
  background: var(--p5-yellow);
  border: 2px solid var(--p5-yellow);
  color: var(--p5-black);
  font-weight: 700;
  font-size: 14px;
  padding: 10px 20px;
  box-shadow: 0 4px 12px rgba(255, 215, 0, 0.4);
}

.btn-analyze:hover {
  background: var(--p5-yellow-bright);
  border-color: var(--p5-yellow-bright);
  box-shadow: 0 4px 16px rgba(255, 215, 0, 0.6), 0 0 30px rgba(255, 215, 0, 0.5);
  transform: translateY(-2px);
}

.btn-analyze::before {
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
}

.btn-sm {
  padding: 5px 10px;
  font-size: 12px;
}

.button-group,
.selection-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* ========================================
   输入框系统
   ======================================== */
.input-group {
  margin-bottom: var(--space-4);
}

.input-group label,
.filter-item label,
.form-group label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  color: var(--p5-gray-lighter);
  margin-bottom: var(--space-2);
  letter-spacing: 0.3px;
}

.input-group input,
.input-group select,
.filter-item input,
.filter-item select,
input[type="text"],
input[type="number"],
select,
textarea,
.tag-input,
.tag-autocomplete-input {
  width: 100%;
  padding: 8px 12px;
  background: var(--p5-black-soft);
  border: 1px solid var(--p5-gray-dark);
  border-radius: var(--radius-sm);
  color: var(--p5-white);
  font-size: 13px;
  font-family: var(--font-main);
  transition: all var(--transition-fast) ease;
  outline: none;
}

input:focus,
select:focus,
textarea:focus,
.tag-input:focus,
.tag-autocomplete-input:focus {
  border-color: var(--p5-red);
  box-shadow: 0 0 0 3px var(--p5-red-glow);
}

input::placeholder,
textarea::placeholder {
  color: var(--p5-gray-light);
  font-style: italic;
}

/* Select下拉箭头 */
select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23E60012' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
  background-position: calc(100% - 12px) center;
  background-repeat: no-repeat;
  padding-right: 36px;
  cursor: pointer;
}

/* ========================================
   筛选区域
   ======================================== */
.filter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.filter-item {
  display: flex;
  flex-direction: column;
}

.filter-bar {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  background: var(--p5-black-panel);
}

.toolbar-row,
.config-row {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
  align-items: flex-end;
}

/* ========================================
   统计卡片系统
   ======================================== */
.stats-section,
.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-3);
  background: transparent;
  border: none;
  padding: 0 0 var(--space-5) 0;
}

.stats-section::before,
.stats-bar::before {
  display: none;
}

.stat-card,
.stat-item {
  background: linear-gradient(135deg, var(--p5-black-card) 0%, rgba(26, 26, 26, 0.8) 100%);
  border: var(--p5-border);
  border-radius: var(--radius-md);
  padding: 8px var(--space-3);
  text-align: center;
  position: relative;
  transition: all var(--transition-normal) ease;
  overflow: hidden;
  line-height: 1.3;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(230, 0, 18, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(230, 0, 18, 0.3);
  border-color: rgba(230, 0, 18, 0.6);
}

.stat-card .number,
.stat-number {
  font-size: 28px;
  font-weight: 800;
  color: var(--p5-white);
  font-family: var(--font-display);
  margin-bottom: var(--space-1);
  line-height: 1;
}

.stat-card .label,
.stat-label {
  font-size: 11px;
  color: var(--p5-gray-lighter);
  font-weight: 500;
}

/* ========================================
   视频卡片系统
   ======================================== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-6);
}

.video-card {
  background: var(--p5-black-card);
  border: var(--p5-border);
  overflow: hidden;
  position: relative;
  transition: all var(--transition-normal) ease;
  clip-path: polygon(
    0 0,
    calc(100% - 20px) 0,
    100% 20px,
    100% 100%,
    0 100%
  );
  cursor: pointer;
}

.video-card::before {
  content: '';
  position: absolute;
  top: -2px;
  right: -2px;
  width: 24px;
  height: 24px;
  background: var(--p5-red);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
  z-index: 2;
}

.video-card:hover {
  transform: translateY(-6px) rotate(-0.5deg);
  box-shadow: var(--p5-shadow-lg), 0 12px 32px rgba(0, 0, 0, 0.9);
  border-color: var(--p5-yellow);
}

.video-thumbnail {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  background: var(--p5-black);
  overflow: hidden;
}

.video-thumbnail img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: all var(--transition-slow) ease;
  filter: grayscale(0.2);
}

.video-card:hover .video-thumbnail img {
  transform: scale(1.08);
  filter: grayscale(0);
}

.video-badge {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  background: var(--p5-red);
  color: var(--p5-white);
  padding: var(--space-1) var(--space-3);
  font-size: 11px;
  font-weight: 700;
  clip-path: polygon(4px 0, 100% 0, 100% calc(100% - 4px), calc(100% - 4px) 100%, 0 100%, 0 4px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.8);
  z-index: 3;
}

.video-rank {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  background: var(--p5-black-panel);
  color: var(--p5-yellow);
  padding: var(--space-2) var(--space-3);
  font-size: 13px;
  font-weight: 900;
  border: 2px solid var(--p5-red);
  z-index: 3;
}

.video-checkbox {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  width: 24px;
  height: 24px;
  cursor: pointer;
  z-index: 10;
  accent-color: var(--p5-red);
  display: none;
}

.select-mode .video-checkbox {
  display: block;
}

.video-card.selected {
  outline: 3px solid var(--p5-red);
  box-shadow: 0 0 0 3px var(--p5-red-glow);
}

.video-info {
  padding: var(--space-4);
}

.video-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--p5-white);
  margin-bottom: var(--space-3);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.4;
}

.channel-info {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--p5-gray-dark);
}

.channel-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--p5-gray-dark);
  object-fit: cover;
  border: 2px solid rgba(230, 0, 18, 0.5);
}

.channel-details {
  flex: 1;
  min-width: 0;
}

.channel-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--p5-white);
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.channel-stats,
.channel-link {
  font-size: 11px;
  color: var(--p5-gray-light);
}

.video-stats,
.video-meta {
  display: flex;
  justify-content: space-between;
  gap: var(--space-2);
  font-size: 11px;
  color: var(--p5-gray-lighter);
  flex-wrap: wrap;
  line-height: 1.4;
}

/* ========================================
   标签系统
   ======================================== */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 4px 10px;
  background: linear-gradient(135deg, rgba(230, 0, 18, 0.12) 0%, rgba(230, 0, 18, 0.08) 100%);
  color: var(--p5-white);
  border: 1px solid rgba(230, 0, 18, 0.35);
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  margin-right: 4px;
  margin-bottom: 4px;
  white-space: nowrap;
  transition: all var(--transition-fast) ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.tag:hover {
  background: linear-gradient(135deg, rgba(230, 0, 18, 0.2) 0%, rgba(230, 0, 18, 0.15) 100%);
  border-color: rgba(230, 0, 18, 0.5);
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(230, 0, 18, 0.3);
}

.tag.hot {
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.18) 0%, rgba(255, 215, 0, 0.12) 100%);
  color: var(--p5-yellow);
  border-color: rgba(255, 215, 0, 0.45);
  box-shadow: 0 1px 3px rgba(255, 215, 0, 0.2);
}

.tag.hot:hover {
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.25) 0%, rgba(255, 215, 0, 0.18) 100%);
  border-color: rgba(255, 215, 0, 0.6);
  box-shadow: 0 2px 4px rgba(255, 215, 0, 0.4);
}

/* 标签容器 - 支持多标签显示 */
.tags-container {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  align-items: center;
  max-width: 100%;
}

/* ========================================
   选择工具栏
   ======================================== */
.selection-toolbar {
  padding: var(--space-4) var(--space-6);
  background: var(--p5-black-panel);
  border: var(--p5-border);
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
}

.selection-info {
  font-size: 14px;
  color: var(--p5-yellow);
  font-weight: 700;
}

/* ========================================
   博主链接区域
   ======================================== */
.channel-links-section {
  display: none;
}

.channel-links-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
  gap: var(--space-3);
}

.channel-link-item {
  background: var(--p5-black-panel);
  padding: var(--space-4);
  border: 1px solid var(--p5-gray-dark);
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  transition: all var(--transition-fast) ease;
}

.channel-link-item:hover {
  background: var(--p5-gray-darkest);
  border-color: var(--p5-red);
  transform: translateX(4px);
}

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

.channel-link-name {
  font-weight: 600;
  color: var(--p5-white);
  margin-bottom: var(--space-1);
}

.channel-link-url {
  color: var(--p5-gray-lighter);
  font-size: 13px;
  word-break: break-all;
}

.btn-copy {
  background: var(--p5-red);
  color: var(--p5-white);
  padding: var(--space-2) var(--space-4);
  border: 2px solid var(--p5-red);
  cursor: pointer;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
  transition: all var(--transition-fast) ease;
  clip-path: polygon(4px 0, 100% 0, 100% calc(100% - 4px), calc(100% - 4px) 100%, 0 100%, 0 4px);
}

.btn-copy:hover {
  background: var(--p5-red-light);
  box-shadow: var(--p5-shadow-sm);
}

/* ========================================
   表格系统
   ======================================== */
table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

thead {
  background: linear-gradient(180deg, var(--p5-black-panel) 0%, rgba(15, 15, 15, 0.95) 100%);
  position: sticky;
  top: 0;
  z-index: 10;
}

th {
  padding: 10px 12px;
  text-align: left;
  background: var(--p5-black-panel);
  color: var(--p5-red);
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  border-bottom: 1px solid var(--p5-red);
  white-space: nowrap;
}

td {
  padding: 10px 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--p5-white);
  font-size: 13px;
  vertical-align: middle;
}

tbody tr {
  background: var(--p5-black-card);
  transition: all var(--transition-fast) ease;
}

tbody tr:hover {
  background: var(--p5-gray-darker);
  transform: translateX(2px);
}

/* 标签列样式优化 */
td .tags-container {
  min-height: 28px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

td .tag-input {
  min-height: 32px;
  padding: 6px 10px;
  font-size: 12px;
}

td a {
  color: var(--p5-white);
  text-decoration: none;
  transition: color var(--transition-fast) ease;
}

td a:hover {
  color: var(--p5-red);
}

.sort-icon {
  cursor: pointer;
  margin-left: var(--space-1);
  color: var(--p5-gray-light);
  transition: color var(--transition-fast) ease;
}

.sort-icon:hover {
  color: var(--p5-red);
}

.number-display {
  font-weight: 600;
  color: var(--p5-white);
}

/* ========================================
   标签自动补全
   ======================================== */
.tag-autocomplete-container {
  position: relative;
  flex: 1;
  min-width: 200px;
}

.tag-clear-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--p5-gray-light);
  cursor: pointer;
  font-size: 16px;
  padding: 0 4px;
  display: none;
  transition: color var(--transition-fast) ease;
}

.tag-clear-btn:hover {
  color: var(--p5-red);
}

.tag-autocomplete-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--p5-black-panel);
  border: 1px solid var(--p5-red);
  border-top: none;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  max-height: 300px;
  overflow-y: auto;
  z-index: 1000;
  display: none;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.8);
  margin-top: 0;
}

.tag-autocomplete-item {
  padding: var(--space-3);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--p5-gray-dark);
  transition: all var(--transition-fast) ease;
}

.tag-autocomplete-item:last-child {
  border-bottom: none;
}

.tag-autocomplete-item:hover,
.tag-autocomplete-item.selected {
  background: var(--p5-gray-darker);
}

.tag-name {
  font-weight: 600;
  color: var(--p5-white);
}

.tag-count {
  font-size: 10px;
  color: var(--p5-gray-light);
  background: var(--p5-black-soft);
  padding: 2px 6px;
  border: 1px solid var(--p5-gray-dark);
  border-radius: 8px;
}

.tag-autocomplete-empty {
  padding: var(--space-4);
  text-align: center;
  color: var(--p5-gray-light);
  font-size: 12px;
}

/* ========================================
   右键菜单
   ======================================== */
.context-menu {
  position: fixed;
  background: var(--p5-black-card);
  border: var(--p5-border);
  padding: var(--space-2) 0;
  z-index: 2000;
  display: none;
  min-width: 180px;
  box-shadow: var(--p5-shadow-dark);
}

.context-menu.active {
  display: block;
}

.context-menu-item {
  padding: var(--space-3) var(--space-4);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--p5-white);
  font-size: 14px;
  transition: background var(--transition-fast);
  border: none;
  background: transparent;
  width: 100%;
  text-align: left;
  font-weight: 600;
  text-transform: none;
  clip-path: none;
}

.context-menu-item:hover {
  background: var(--p5-gray-darker);
}

.context-menu-item.danger:hover {
  background: rgba(230, 0, 18, 0.2);
  color: var(--p5-red);
}

.context-menu-divider {
  height: 1px;
  background: var(--p5-gray-dark);
  margin: var(--space-2) 0;
}

/* ========================================
   模态框
   ======================================== */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--p5-overlay);
  z-index: 2000;
  animation: fadeIn var(--transition-normal) ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-content {
  background: var(--p5-black-card);
  border: var(--p5-border-thick);
  border-radius: var(--radius-lg);
  margin: 10% auto;
  padding: var(--space-8);
  width: 90%;
  max-width: 600px;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.8), 0 0 60px rgba(230, 0, 18, 0.3);
  animation: slideDown var(--transition-normal) ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 2px solid var(--p5-red);
}

.modal-header h2 {
  margin: 0;
  padding: 0;
}

.close,
.modal-close {
  cursor: pointer;
  font-size: 28px;
  color: var(--p5-gray-lighter);
  transition: all var(--transition-fast) ease;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 2px solid transparent;
}

.close:hover,
.modal-close:hover {
  color: var(--p5-red);
  border-color: var(--p5-red);
  transform: rotate(90deg);
}

.form-group {
  margin-bottom: var(--space-5);
}

/* ========================================
   进度系统
   ======================================== */
.progress-section {
  background: var(--p5-black-card);
  border: var(--p5-border);
  padding: var(--space-5);
  margin-bottom: var(--space-6);
  display: none;
}

.progress-info {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-3);
  font-size: 14px;
  font-weight: 600;
}

.progress-text {
  color: var(--p5-white);
}

.progress-percent {
  color: var(--p5-yellow);
}

.progress-bar-container {
  height: 8px;
  background: var(--p5-gray-dark);
  border: 2px solid var(--p5-gray);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--p5-red-dark), var(--p5-red-light));
  width: 0%;
  transition: width var(--transition-normal) ease;
  box-shadow: 0 0 10px var(--p5-red-glow);
}

/* ========================================
   消息提示
   ======================================== */
.message,
.error,
.success,
.warning {
  padding: 12px 16px;
  margin: var(--space-4) 0;
  border-left: 3px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  backdrop-filter: blur(10px);
}

.success {
  background: rgba(0, 255, 65, 0.12);
  border-left-color: var(--p5-success);
  color: var(--p5-success);
}

.warning {
  background: rgba(255, 215, 0, 0.12);
  border-left-color: var(--p5-yellow);
  color: var(--p5-yellow);
}

.error {
  background: rgba(230, 0, 18, 0.12);
  border-left-color: var(--p5-red);
  color: var(--p5-red);
}

/* ========================================
   加载动画
   ======================================== */
.loading {
  text-align: center;
  padding: var(--space-12);
  color: var(--p5-gray-lighter);
}

.loading-spinner {
  border: 3px solid var(--p5-gray-dark);
  border-top: 3px solid var(--p5-red);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 0.8s linear infinite;
  margin: 0 auto var(--space-4);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ========================================
   动作栏
   ======================================== */
.action-buttons {
  display: flex;
  gap: 6px;
  justify-content: center;
}

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

::-webkit-scrollbar-track {
  background: var(--p5-black-panel);
}

::-webkit-scrollbar-thumb {
  background: var(--p5-red);
  border: 2px solid var(--p5-black-panel);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--p5-red-light);
}

* {
  scrollbar-width: thin;
  scrollbar-color: var(--p5-red) var(--p5-black-panel);
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 768px) {
  body {
    padding: var(--space-2);
    font-size: 13px;
  }

  /* 移动端导航 */
  .top-nav {
    position: relative;
  }

  .top-nav .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--p5-black-panel);
    border-bottom: var(--p5-border);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.5);
    z-index: 1000;
  }

  .top-nav .nav-menu.show {
    display: block;
    animation: slideDown 0.3s ease-out;
  }

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

  .top-nav .nav-menu ul {
    flex-direction: column;
    gap: 4px;
    padding: 12px 16px;
  }

  .top-nav .nav-menu li a {
    width: 100%;
    text-align: left;
    padding: 10px 16px;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .top-nav .nav-container {
    padding: 12px 16px;
  }

  .header h1 {
    font-size: 22px;
  }
  
  .header p {
    font-size: 12px;
  }

  .card,
  .config-section,
  .filter-section,
  .toolbar {
    padding: var(--space-4);
  }
  
  .stats-bar {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--space-2);
  }
  
  .stat-number {
    font-size: 24px;
  }
  
  .stat-label {
    font-size: 10px;
  }

  .button-group,
  .selection-actions {
    gap: var(--space-2);
  }

  .button-group .btn,
  .selection-actions .btn {
    flex: 1 1 calc(50% - var(--space-2));
    min-width: 140px;
    font-size: 13px;
    padding: 10px 12px;
  }

  /* 主要按钮保持全宽 */
  .button-group .btn-analyze,
  .button-group .btn-primary:first-child {
    flex: 1 1 100%;
    min-width: 100%;
  }

  .video-grid {
    grid-template-columns: 1fr;
  }
  
  th, td {
    padding: 8px 6px;
    font-size: 12px;
  }
  
  .btn {
    font-size: 13px;
    min-height: 44px; /* 触摸友好的最小尺寸 */
    padding: 10px 16px;
  }

  /* 移动端输入框优化 */
  input, select, textarea {
    font-size: 16px !important; /* 防止iOS自动缩放 */
  }

  /* 选择工具栏移动端优化 */
  .selection-toolbar {
    flex-direction: column;
    gap: var(--space-2);
    padding: var(--space-3);
  }

  .selection-info {
    text-align: center;
    font-size: 14px;
  }

  .selection-actions {
    width: 100%;
  }

  /* 卡片间距优化 */
  .card {
    margin-bottom: var(--space-3);
  }

  /* 视频卡片优化 */
  .video-card {
    padding: var(--space-3);
  }

  .video-card h4 {
    font-size: 14px;
    line-height: 1.4;
  }

  .video-info {
    font-size: 12px;
  }

  /* 频道链接区域优化 */
  .channel-links-header {
    flex-direction: column;
    gap: var(--space-2);
    align-items: stretch;
  }

  .channel-links-header .btn {
    width: 100%;
  }
}

/* ========================================
   可访问性
   ======================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

*:focus-visible {
  outline: 2px solid var(--p5-red);
  outline-offset: 2px;
}