* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: #f5f7fa;
  color: #1f2937;
  line-height: 1.5;
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: linear-gradient(135deg, #2563eb, #3b82f6);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
}

.topbar h1 {
  margin: 0;
  font-size: 20px;
  font-weight: 600;
}

.meta {
  color: #6b7280;
  font-size: 14px;
}

.main {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 24px;
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

#search {
  width: 320px;
  max-width: 100%;
  padding: 10px 14px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  transition: border-color .15s;
}

#search:focus {
  border-color: #2563eb;
}

.stats {
  font-size: 14px;
  color: #6b7280;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.card {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: box-shadow .15s, transform .1s;
  text-decoration: none;
  color: inherit;
}

.card:hover {
  box-shadow: 0 6px 20px rgba(0, 0, 0, .06);
  transform: translateY(-1px);
}

.card.disabled {
  opacity: .7;
  cursor: not-allowed;
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.card-title {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.35;
}

.card-desc {
  font-size: 14px;
  color: #6b7280;
  flex: 1;
}

.icon-box {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.icon-box svg {
  width: 24px;
  height: 24px;
  fill: #fff;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 20px;
  background: #f3f4f6;
  color: #6b7280;
  align-self: flex-start;
}

.status.online {
  background: #dcfce7;
  color: #166534;
}

.status.offline {
  background: #fee2e2;
  color: #991b1b;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
}

.card-url {
  font-size: 12px;
  color: #9ca3af;
  word-break: break-all;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  border: none;
  cursor: pointer;
  background: #2563eb;
  color: #fff;
  text-decoration: none;
  transition: background .15s;
}

.btn:hover {
  background: #1d4ed8;
}

.btn.secondary {
  background: #f3f4f6;
  color: #374151;
}

.btn.secondary:hover {
  background: #e5e7eb;
}

.card-actions {
  display: flex;
  gap: 10px;
  margin-top: auto;
  padding-top: 8px;
}

.loading, .empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  color: #6b7280;
}

.footer {
  text-align: center;
  padding: 16px;
  font-size: 13px;
  color: #9ca3af;
  background: #fff;
  border-top: 1px solid #e5e7eb;
}

@media (max-width: 640px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  #search {
    width: 100%;
  }
}