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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  background-color: #121212;
  color: #e0e0e0;
  padding: 20px;
}


#container.page-wrapper {
  max-width: 1200px;
  margin: auto;
  display: flex;
  flex-direction: row;
  gap: 20px;
}


.header {
  text-align: center;
  margin-bottom: 30px;
}

.header h1 span {
  font-size: 2.5em;
  color: #81c784;
}

.header h2 span {
  font-size: 1.2em;
  color: #a5d6a7;
}


.main {
  flex: 3;
}

.sidebar {
  flex: 1;
  background-color: #1e1e1e;
  padding: 20px;
  border-radius: 8px;
}


h3 span {
  font-size: 1.5em;
  border-bottom: 2px solid #81c784;
  display: inline-block;
  margin-bottom: 10px;
  color: #ffffff;
}

p span, li span {
  display: block;
  margin-bottom: 10px;
}

a {
  color: #81c784;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

strong {
  color: #ffffff;
}

acronym {
  border-bottom: 1px dotted #ccc;
  cursor: help;
}


ul {
  list-style: none;
  padding-left: 0;
}

ul li {
  margin-bottom: 10px;
}

.sidebar h3 span {
  font-size: 1.2em;
  color: #81c784;
}


.design-name {
  font-weight: bold;
}

.designer-name {
  font-style: italic;
}


.footer {
  margin-top: 40px;
  text-align: center;
}

.footer a {
  margin-right: 15px;
}


#extraDiv1,
#extraDiv2,
#extraDiv3,
#extraDiv4,
#extraDiv5,
#extraDiv6 {
  display: none;
}


@media (max-width: 768px) {
  #container.page-wrapper {
    flex-direction: column;
  }

  .sidebar {
    margin-top: 20px;
  }
}
  body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  background-color: #b92a2a;
  background-image: url('foto.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat; 
  color: #e0e0e0;
  padding: 20px;
  background-attachment: fixed;

}