/* :root {
  
  --edge-color: #c4c4c4;
  --light-grey: #ededed;
  
  --edge-color: #4e4e4e;
  --light-grey: #e4e4e4;
} */

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

body {
  font-family: Arial, sans-serif;
  line-height: 1.5;
  background-color: #f9f9f9;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  height: 100vh;
}

header.top-header {
  /* background-color: rgba(255, 255, 255, 0.5); */
  color: #333;
  display: flex;
  align-items: center;
  padding: 0.5rem 0.5rem 0.25rem 0.5rem;
  gap: 1rem;
  text-align: left;
  margin-bottom: 0.4rem;
  background-color: var(--light-grey);
  border-bottom: solid 0.25rem var(--edge-color);
}

header.top-header .dinosaur-img {
  height: 50px;
  border: 2px solid #333;
  border-radius: 8px;
}

main.container {
  display: flex;
  flex: 1;
  flex-direction: row;
  min-height: 0;
  overflow: hidden;
}

.side-nav {
  flex: 1;
  /* background-color: rgba(255, 255, 255, 0.5); */
  color: #555;
  padding: 1rem;
  margin: 0 1rem 0 0;
  background-color: var(--light-grey);
  border-top: solid 0.25rem var(--edge-color);
  border-bottom: solid 0.25rem var(--edge-color);
  border-right: solid 0.25rem var(--edge-color);
  overflow: auto;
  min-height: 0;
}

.side-nav nav ul {
  list-style: none;
}

.side-nav nav ul li a {
  color: #444;
  text-decoration: none;
  display: block;
  padding: 0.45rem;
  font-size: 0.85rem;
}

.side-nav nav ul li a:hover {
  background-color: #333;
  color: var(--light-grey);
}

.content {
  flex: 3;
  background-size: cover;
  background-position: center;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-right: 1rem;
  border: solid 0.25rem var(--edge-color);
  min-height: 0;
  overflow: hidden;
}

.content-container {
  background-color: #fff;
  border: 1px solid #333;
  padding: 1.4rem;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
}

footer {
  background-color: #fff;
  color: #333;
  text-align: center;
  padding: 0.4rem;
  font-size: 0.8rem;
}

@media (max-width: 768px) {
  main.container {
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
  }

  .side-nav {
    flex: none;
    order: 2;
    margin: 0;
    text-align: center;
    padding: 0.3rem;
    border-top: none;
    border-left: solid 0.25rem var(--edge-color);
    overflow: auto;
    min-height: 0;
  }

  .content {
    order: 1;
    margin-right: 0;
    padding: 20px;
    min-height: 0;
    overflow: hidden;
    flex: 1 1 auto;
  }

  .content-container {
    flex: 1 1 auto;
    min-height: 0;
    overflow: hidden;
  }
}