* {
  box-sizing: border-box;
}

body {
  color: #333;
  background-color: #f8f9fa;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  margin: 0;
}

body {
  --padding-inline: 15px;
  --padding-block: 15px;
  min-block-size: 100svb;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-inline: var(--padding-inline);
  max-inline-size: 60rem;
  margin-inline: auto;

  & > footer {
    margin-block-start: auto;
  }
}

:is(h1, h2, h3, h4) {
  line-height: 1.1;
}

:focus-visible {
  outline: 2px solid #007bff;
  outline-offset: 2px;
}

.site-nav {
  background-color: #f8f9fa;
  border-block-end: 1px solid #eaeaea;
  padding-block: var(--padding-block);
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;

  @media (max-width: 600px) {
    flex-direction: column;
  }
}

.site-nav a {
  text-decoration: none;
  color: #333;
  transition: color 0.2s;

  &:hover {
    color: #007bff;
  }
}

.site-footer {
  border-block-start: 1px solid #eaeaea;
  padding-block: var(--padding-block);
}

.site-footer a {
  text-decoration: none;
  color: #333;
  transition: color 0.2s;

  &:hover {
    color: #007bff;
  }
}

.panel {
  --_padding-panel: var(--padding-panel, 20px);
  padding: var(--_padding-panel);

  color: #444444;
  background-color: #ffffff;
  border-radius: 8px;

  &.hero {
    --_padding-panel: 50px 20px;
    text-align: center;
    color: #ffffff;
    background-color: #007bff;
  }
}

.visually-hidden:not(:focus):not(:active) {
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  inline-size: 1px;
  block-size: 1px;
  overflow: hidden;
  position: absolute;
  white-space: nowrap;
}