/* ========== 头部导航 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  height: var(--header-height);
  background: rgba(15, 25, 35, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition-normal);
}
.site-header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-xl);
  font-weight: bold;
  color: var(--text-primary);
}
.site-logo img { height: 36px; }
.site-logo .logo-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  height: 100%;
}
.main-nav a {
  color: var(--text-secondary);
  font-size: var(--font-md);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}
.main-nav a:hover, .main-nav a.active {
  color: var(--text-primary);
}
.main-nav a.active::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary-color);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}
.user-menu {
  position: relative;
  cursor: pointer;
}
.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid var(--border-color);
  object-fit: cover;
}
.user-dropdown {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  min-width: 200px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: none;
}
.user-dropdown.show { display: block; }
.user-dropdown a {
  display: block;
  padding: 10px 16px;
  color: var(--text-primary);
  transition: background var(--transition-fast);
}
.user-dropdown a:hover { background: var(--bg-hover); }

/* ========== 页脚 ========== */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-xl) 0;
  margin-top: var(--spacing-2xl);
  color: var(--text-tertiary);
  font-size: var(--font-sm);
}
.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
}
.footer-links a {
  display: block;
  color: var(--text-secondary);
  padding: 4px 0;
}
.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 8px 20px;
  font-size: var(--font-md);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: var(--shadow-primary);
}
.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  color: #fff;
}
.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--border-color);
}
.btn-secondary:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}
.btn-outline {
  background: transparent;
  border-color: var(--border-color);
  color: var(--text-primary);
}
.btn-outline:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}
.btn-danger {
  background: var(--error-color);
  color: #fff;
}
.btn-success { background: var(--success-color); color: #fff; }
.btn-sm { padding: 4px 12px; font-size: var(--font-sm); }
.btn-lg { padding: 12px 28px; font-size: var(--font-lg); }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ========== 表单 ========== */
.form-group {
  margin-bottom: var(--spacing-md);
}
.form-label {
  display: block;
  margin-bottom: 6px;
  font-size: var(--font-sm);
  color: var(--text-secondary);
}
.form-label .required { color: var(--error-color); }
.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--font-md);
  transition: border-color var(--transition-fast);
}
.form-input:focus, .form-textarea:focus, .form-select:focus {
  border-color: var(--primary-color);
}
.form-input::placeholder, .form-textarea::placeholder {
  color: var(--text-tertiary);
}
.form-textarea {
  min-height: 100px;
  resize: vertical;
}
.form-error {
  color: var(--error-color);
  font-size: var(--font-sm);
  margin-top: 4px;
}
.form-hint {
  color: var(--text-tertiary);
  font-size: var(--font-xs);
  margin-top: 4px;
}

/* ========== 模态框 ========== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s ease;
}
.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 560px;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  animation: slideUp 0.3s ease;
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}
.modal-title {
  font-size: var(--font-xl);
  font-weight: 600;
}
.modal-close {
  cursor: pointer;
  font-size: 24px;
  color: var(--text-tertiary);
  background: none;
  line-height: 1;
}
.modal-close:hover { color: var(--text-primary); }
.modal-body {
  padding: var(--spacing-lg);
  overflow-y: auto;
  flex: 1;
}
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--border-color);
}
@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* ========== Toast 提示 ========== */
.toast-container {
  position: fixed;
  top: 80px;
  right: 20px;
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}
.toast {
  padding: 12px 20px;
  border-radius: var(--radius-md);
  background: var(--bg-tertiary);
  border-left: 4px solid var(--info-color);
  color: var(--text-primary);
  box-shadow: var(--shadow-lg);
  min-width: 240px;
  animation: slideInRight 0.3s ease;
}
.toast.success { border-left-color: var(--success-color); }
.toast.error { border-left-color: var(--error-color); }
.toast.warning { border-left-color: var(--warning-color); }

/* ========== 轮播图 ========== */
.carousel {
  position: relative;
  width: 100%;
  height: 400px;
  overflow: hidden;
  border-radius: var(--radius-lg);
}
.carousel-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.5s ease;
}
.carousel-slide.active { opacity: 1; }
.carousel-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.carousel-indicators {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
}
.carousel-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: background var(--transition-fast);
}
.carousel-indicator.active { background: var(--primary-color); }

/* ========== 标签页 ========== */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  gap: var(--spacing-sm);
}
.tab {
  padding: 10px 20px;
  cursor: pointer;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}
.tab:hover { color: var(--text-primary); }
.tab.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}

/* ========== 赛事卡片 ========== */
.tournament-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition-normal);
}
.tournament-card:hover {
  border-color: var(--primary-color);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.tournament-card .cover {
  position: relative;
  height: 180px;
  overflow: hidden;
}
.tournament-card .cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}
.tournament-card:hover .cover img { transform: scale(1.05); }
.tournament-card .status-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: var(--font-xs);
  font-weight: 600;
}
.tournament-card .info { padding: var(--spacing-md); }
.tournament-card .title {
  font-size: var(--font-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}
.tournament-card .meta {
  display: flex;
  gap: var(--spacing-md);
  font-size: var(--font-sm);
  color: var(--text-secondary);
}

/* ========== 网格布局 ========== */
.grid {
  display: grid;
  gap: var(--spacing-md);
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ========== 徽章 ========== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: var(--font-xs);
  font-weight: 600;
}
.badge-live {
  background: var(--error-color);
  color: #fff;
  animation: pulse 1.5s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

/* ========== 侧边栏（管理后台） ========== */
.admin-layout {
  display: flex;
  min-height: calc(100vh - var(--header-height));
}
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: var(--header-height);
  height: calc(100vh - var(--header-height));
  overflow-y: auto;
}
.sidebar-menu { padding: 0 var(--spacing-sm); }
.sidebar-menu-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 10px 12px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-bottom: 2px;
}
.sidebar-menu-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}
.sidebar-menu-item.active {
  background: rgba(255, 70, 85, 0.15);
  color: var(--primary-color);
}
.sidebar-menu-group-title {
  padding: 12px;
  font-size: var(--font-xs);
  color: var(--text-tertiary);
  text-transform: uppercase;
}
.admin-content {
  flex: 1;
  padding: var(--spacing-lg);
  overflow-x: auto;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--primary-color); }
.breadcrumb .separator { color: var(--text-tertiary); }

/* ========== 房间码显示框 ========== */
.room-code-box {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 12px 24px;
  background: var(--bg-tertiary);
  border: 2px dashed var(--primary-color);
  border-radius: var(--radius-md);
  font-size: var(--font-2xl);
  font-weight: bold;
  letter-spacing: 2px;
  color: var(--primary-color);
  font-family: 'Courier New', monospace;
}
.room-code-locked {
  border-color: var(--border-color);
  color: var(--text-tertiary);
  font-size: var(--font-md);
  letter-spacing: 0;
}

/* ========== 直播播放器 ========== */
.live-player-wrapper {
  position: relative;
  width: 100%;
  background: #000;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 16 / 9;
}
.live-player-wrapper img.live-stream {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.live-overlay {
  position: absolute;
  top: 12px;
  left: 12px;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}
.live-status-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(244, 67, 54, 0.9);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: var(--font-sm);
  color: #fff;
  font-weight: 600;
}
.live-status-indicator::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #fff;
  animation: pulse 1s infinite;
}

/* 弹幕层 */
.danmaku-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.danmaku-item {
  position: absolute;
  white-space: nowrap;
  color: #fff;
  font-size: 18px;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.8);
  animation: danmaku-move linear forwards;
}
@keyframes danmaku-move {
  from { transform: translateX(100%); }
  to { transform: translateX(-100%); }
}

/* ========== 企业级状态点 / 空状态工具类（替代 emoji） ========== */

/* 状态点：用于直播中/已结束等状态指示 */
.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: middle;
  background: var(--text-tertiary);
  flex-shrink: 0;
}
.status-dot.live {
  background: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(255, 70, 85, 0.18);
  animation: status-pulse 1.6s ease-in-out infinite;
}
.status-dot.success { background: var(--success-color); }
.status-dot.warning { background: var(--warning-color); }
.status-dot.error { background: var(--error-color); }
.status-dot.info { background: var(--info-color); }
.status-dot.idle { background: var(--text-disabled); }

@keyframes status-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

/* 区段标签：替代头部 emoji，红色短竖线 + 大写英文 */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 8px;
}
.section-tag::before {
  content: "";
  width: 12px;
  height: 2px;
  background: var(--primary-color);
  display: inline-block;
}

/* 统计卡片图标位（无 emoji，仅留可选的几何标记） */
.stat-icon-mark {
  width: 3px;
  height: 18px;
  background: var(--primary-color);
  border-radius: 2px;
  display: inline-block;
  flex-shrink: 0;
}

/* 空状态（无 emoji 版） */
.empty-state {
  text-align: center;
  padding: 48px 16px;
  color: var(--text-tertiary);
  font-size: 13px;
  letter-spacing: 0.5px;
}
.empty-state::before {
  content: "";
  display: block;
  width: 40px;
  height: 40px;
  margin: 0 auto 16px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  position: relative;
  background:
    linear-gradient(45deg, transparent 46%, var(--border-color) 46%, var(--border-color) 54%, transparent 54%),
    linear-gradient(-45deg, transparent 46%, var(--border-color) 46%, var(--border-color) 54%, transparent 54%);
}