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

body {
  background-color: #f4f4f4;
  font-family: system-ui, sans-serif;
  line-height: 1.4;
  color: #333;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  width: auto;
  height: auto;
  padding: 0.5rem 1rem;
  background: #222;
  color: #fff;
  z-index: 1000;
}

header,
footer {
  text-align: center;
  padding: 1rem;
  background: #fff;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.color-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
  padding: 1rem;
  max-width: 800px;
  margin: 2rem auto;
}

.color-box {
  width: 100%;
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  color: #fff;
  font-weight: bold;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
}

.color1 {
  background-color: #e91e63;
}

.color2 {
  background-color: rgb(33, 150, 243);
}

.color3 {
  background-color: gold;
  color: #333;
}

.color4 {
  background-color: hsl(120, 60%, 40%);
}

.color5 {
  background-color: rgba(255, 193, 7, 0.8);
}