:root {
  --main-color: #0066cc;
  --background: #f9f9f9;
  --text-color: #333;
  --font-base: 'Segoe UI', sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-base);
  line-height: 1.6;
  background: var(--background);
  color: var(--text-color);
  margin: 0;
  padding: 0;
}

header, nav, footer {
  background: #eee;
  padding: 1rem;
}

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 0;
}

main {
  padding: 2rem;
  display: grid;
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  main {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }
}

a {
  color: var(--main-color);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1, h2, h3 {
  color: var(--main-color);
}

ul {
  padding-left: 1.5rem;
}

[tabindex]:focus,
a:focus {
  outline: 3px solid #ffbf47;
  outline-offset: 4px;
}

.shrek{
position: relative;
}

.shrek img{
  max-width: 100%;
  height: auto;
}

.botImg{
  position: absolute;
  top: 0;
  left: 0;
}
.topImg:hover {
  opacity: 0;
}