/* Reset & Base Styles */
html, body {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
  color: #333;
  height: 100%;
  font-size: 62.5%; 
  overflow: hidden;
  height: 100%;

}
#app {
  height: 100%;
  display: flex;
  flex-direction: column;
}

*, *::before, *::after {
  box-sizing: border-box;
}

/* Root App Container */
#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  overflow: hidden;
}

/* Top Navigation Bar */
header, .navbar, .top-navbar {
  height: 6rem;
  background-color: #007bff;
  color: #fff;
  display: flex;
  align-items: center;
  padding: 0 2rem;
  font-size: 1.8rem;
  font-weight: bold;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Custom Element Host (outside shadow DOM) */
my-app {
  width: 100%;
  height: 100%;
  flex: 1;
  display: flex;
  overflow: hidden;
  background-color: #fff;
}