/* Base styles */
body, html {
  height: 100%;
  margin: 0;
}

/* Header */
header {
  height: 10%;
  background-color: #ffd700;
  color: #000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  font-weight: bold;
}

/* Footer */
footer {
  height: 5%;
  background-color: #333;
  color: white;
  text-align: center;
  padding-top: 15px;
}

/* Main content */
main {
  height: 85%;
  display: flex;
  flex-direction: column;
}

/* Content area */
.content-area {
  flex: 1;
  display: flex;
  height: 100%;
}

/* Panels */
.left-panel {
  width: 20%;
  background: #f8f9fa;
  border-right: 1px solid #ddd;
  padding: 10px;
  overflow-y: auto;
}

.center-panel {
  width: 60%;
  padding: 20px;
  overflow-y: auto;
}

.right-panel {
  width: 20%;
  background: #f8f9fa;
  border-left: 1px solid #ddd;
  padding: 10px;
  overflow-y: auto;
}

/* Menu links */
.menu a {
  margin: 0 10px;
  cursor: pointer;
  color: #000;
  text-decoration: none;
  font-weight: 600;
}

.menu a:hover {
  text-decoration: underline;
}

/* Marquee */
marquee {
  color: #007bff;
  font-weight: bold;
}

/* Iframe */
iframe {
  width: 100%;
  border: none;
}