body {

  background: linear-gradient(to bottom, blue, white);
  background-attachment: fixed;
  min-height: 100vh;
  color: white;
  font-family: Verdana;
  margin: 0;
}

header {
  text-align: center;
  font-size: 2em;
  color: #00ffff;
  text-shadow: 0 0 5px #00ffff, 0 0 10px #00ffff;
  margin-bottom: 20px;
  padding-top: 20px;
}

#container {
  width: 800px;
  margin: auto;
}

#content {
  display: flex;
  gap: 20px;
}

nav {
  width: 200px;
  background-color: #964A8E;
  padding: 15px;
  border-radius: 10px;
  box-shadow: 0 0 15px #00ffff;
  height: fit-content;
}

nav a {
  color: #ff00ff;
  text-decoration: none;
  display: block;
  margin: 15px 0;
  font-weight: bold;
  transition: all 0.3s ease; 
}

nav a:hover {
  color: #00ffff;             
  text-shadow: 0 0 10px #00ffff;
  transform: translateX(8px); 
  cursor: pointer;
}

/* IMAGE CONTAINER */
.container {
  position: relative;
  margin-bottom: 20px;
  background: white;
  padding: 10px;
}

/* IMAGE */
.container img {
  width: 100%;
  max-width: 700px;
  display: block;
}

/* FULL OVERLAY */
.overlay {
  position: absolute;
  top: 10px;
  left: 10px;
  width: calc(100% - 20px);
  height: calc(100% - 20px);

  background: rgba(0,0,0,0.6);

  display: flex;
  align-items: center;
  justify-content: center;

  opacity: 0;
  transition: 0.3s;

  color: white;
  font-size: 1.5em;
}

/* HOVER EFFECT */
.container:hover .overlay {
  opacity: 1;
}