/* css/layout.css - 深度美化升级版 */
#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

/* ========== 头部 - 玻璃拟态 ========== */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 var(--spacing-xl);
  background: var(--bg-glass-strong);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-color-light);
  box-shadow: var(--shadow-header);
}

.header-left {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  letter-spacing: -0.02em;
  user-select: none;
  text-decoration: none;
}

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

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
  flex-shrink: 0;
  transition: all var(--transition-base);
}

.logo:hover .logo-icon {
  transform: scale(1.05) rotate(-2deg);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.logo-icon svg {
  width: 20px;
  height: 20px;
}

.header-center {
  flex: 1;
  display: flex;
  justify-content: center;
  max-width: 480px;
  margin: 0 var(--spacing-xl);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 0 0 auto;
}

/* ========== 搜索框 - 现代胶囊 ========== */
.search-wrapper {
  position: relative;
  width: 100%;
}

.search-input {
  width: 100%;
  padding: 10px 16px;
  padding-left: 42px;
  padding-right: 42px;
  border: 1.5px solid var(--border-color);
  border-radius: var(--border-radius-full);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  transition: all var(--transition-base);
}

.search-input:focus {
  border-color: var(--color-primary);
  background: var(--bg-primary);
  box-shadow: 0 0 0 4px var(--color-primary-light), var(--shadow-sm);
}

.search-input::placeholder {
  color: var(--text-muted);
  font-weight: var(--font-weight-normal);
}

.search-btn {
  position: absolute;
  left: 4px;
  top: 50%;
  transform: translateY(-50%);
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.search-btn:hover {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.search-btn svg {
  width: 18px;
  height: 18px;
}

.search-clear {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  display: none;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.search-clear.visible {
  display: flex;
}

.search-clear:hover {
  color: var(--text-secondary);
  background: var(--bg-tertiary);
}

.search-clear svg {
  width: 14px;
  height: 14px;
}

/* ========== 面包屑 - 精致路径 ========== */
.breadcrumb {
  padding: 12px var(--spacing-xl);
  background: var(--bg-glass-subtle);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color-light);
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2px;
  font-size: var(--font-size-sm);
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: 2px;
}

.breadcrumb-item:not(:last-child)::after {
  content: '';
  display: inline-block;
  width: 16px;
  height: 16px;
  margin: 0 2px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='%2394a3b8'%3E%3Cpath d='M10 6L8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z'/%3E%3C/svg%3E") no-repeat center;
  background-size: contain;
  opacity: 0.5;
}

.breadcrumb-item a,
.breadcrumb-item span {
  padding: 4px 10px;
  border-radius: var(--border-radius-sm);
  color: var(--text-secondary);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-fast);
}

.breadcrumb-item a:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.breadcrumb-item:last-child span {
  color: var(--text-primary);
  font-weight: var(--font-weight-semibold);
  background: var(--bg-tertiary);
}

/* ========== 主内容区 ========== */
.main-content {
  flex: 1;
  padding: var(--spacing-lg) var(--spacing-xl);
  max-width: var(--content-max-width);
  width: 100%;
  margin: 0 auto;
}

/* ========== 统计栏 ========== */
.stats-bar {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: 12px 0;
  margin-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-color-light);
  animation: fadeIn 0.4s ease;
}

.stats-bar .stat-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

.stats-bar .stat-item strong {
  color: var(--text-secondary);
  font-weight: var(--font-weight-semibold);
  font-variant-numeric: tabular-nums;
}

.stats-bar .stat-divider {
  width: 1px;
  height: 16px;
  background: var(--border-color);
}

/* ========== 底部 ========== */
.app-footer {
  text-align: center;
  padding: var(--spacing-lg) var(--spacing-xl);
  color: var(--text-muted);
  font-size: var(--font-size-xs);
  border-top: 1px solid var(--border-color-light);
  background: var(--bg-glass-subtle);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.app-footer a {
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
  transition: all var(--transition-fast);
}

.app-footer a:hover {
  color: var(--color-primary-hover);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.icp-link {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.icp-link:hover {
  color: var(--color-primary);
}

/* ========== 友情链接 ========== */
.friend-links {
  padding: var(--spacing-xl);
  background: var(--bg-glass-subtle);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid var(--border-color-light);
}

.friend-links-container {
  max-width: var(--content-max-width);
  width: 100%;
  margin: 0 auto;
}

.friend-links-title {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.friend-links-title svg {
  width: 16px;
  height: 16px;
  opacity: 0.7;
}

.friend-links-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
}

.friend-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color-light);
  border-radius: var(--border-radius);
  transition: all var(--transition-base);
  text-decoration: none;
  min-width: 180px;
  flex: 1;
  max-width: 280px;
}

.friend-link:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md), var(--shadow-glow);
  transform: translateY(-2px);
}

.friend-link-icon {
  font-size: 20px;
  line-height: 1;
}

.friend-link-text {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  flex: 1;
}

.friend-link-url {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  font-family: var(--font-family);
}

@media (max-width: 768px) {
  .friend-links-list {
    gap: var(--spacing-sm);
  }
  
  .friend-link {
    min-width: calc(50% - var(--spacing-sm) / 2);
    max-width: none;
    padding: 10px 12px;
  }
  
  .friend-link-url {
    display: none;
  }
}