/* Reset / box-sizing */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Body */
body {
  font-family: Arial, sans-serif;
  background-color: #ffffff;
  overflow: hidden; /* Prevents scrolling; remove if you want scrolling */
}

/* Header & Logo */
header {
  padding: 20px;
}

.logo {
  width: 250px;
  height: auto;
  display: block;
}

/* Main Section */
main {
  position: relative;
  width: 100%;
  height: calc(100vh - 80px); /* 80px accounts for header space */
  overflow: hidden;
}

/* Iframe Container */
.iframe-container {
  position: relative;
  width: 100%;
  height: 100%;
}

.iframe-container iframe {
  width: 100%;
  height: 100%;
  border: 0;
}