body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f6f7f9;
  color: #1a1a1a;
}

.topbar {
  background: white;
  padding: 16px 24px;
  border-bottom: 1px solid #e6e6e6;
}

.brand h1 {
  margin: 0;
  font-size: 20px;
  letter-spacing: 2px;
}

.brand span {
  font-size: 12px;
  color: #666;
}

.container {
  display: flex;
  height: calc(100vh - 110px);
}

.sidebar {
  width: 280px;
  background: white;
  border-right: 1px solid #e6e6e6;
  padding: 12px;
}

.sidebar input {
  width: 100%;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 6px;
  margin-bottom: 10px;
}

.product {
  padding: 10px;
  cursor: pointer;
  border-radius: 6px;
}

.product:hover {
  background: #f2f4f7;
}

.product.active {
  background: #e9eef5;
}

.content {
  flex: 1;
  padding: 20px;
}

.viewer {
  width: 100%;
  height: 100%;
}

iframe {
  width: 100%;
  height: calc(100vh - 140px);
  border: none;
  background: white;
}

.hidden {
  display: none;
}

footer {
  text-align: center;
  padding: 10px;
  border-top: 1px solid #e6e6e6;
  background: white;
  font-size: 12px;
}