:root {
  --red:   #e74c3c;
  --grey:  #326496;
  --black: #f3f3f3;
}

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

body {
  background: var(--black);
  color: var(--grey);
  font-family: sans-serif;
  line-height: 1.5;
}

a { color: var(--red); text-decoration: none; }
.container {
  max-width: 960px;
  margin: 1rem auto;
  padding: 1rem;
}

header {
  background: var(--red);
  padding: 0.75rem 1rem;
  color: #fff;
}

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

/*nav li { }*/
button, input[type="submit"] {
  background: var(--red);
  color: #fff;
  border: none;
  padding: 0.5rem 1rem;
  cursor: pointer;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

th, td {
  padding: 0.5rem;
  border: 1px solid var(--grey);
}

@media (max-width: 600px) {
  nav ul { flex-direction: column; }
  table, thead, tbody, th, td, tr { display: block; }
  th { display: none; }
  td {
    display: flex; justify-content: space-between;
    padding: 0.5rem;
    border: none;
    border-bottom: 1px solid var(--grey);
  }
  td::before {
    content: attr(data-label);
    font-weight: bold;
    color: #fff;
  }
}