:root {
  --header: rgba(127, 127, 255, 0.6);
  --exists: rgba(127, 127, 255, 0.3);
  --odd: rgba(0, 0, 0, 0.05);
  --even: rgba(0, 0, 0, 0.1);
}

html {
  min-height: 100%;
  height: 100%;
}

body {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  margin: 0;
  padding: 1rem 1rem 3rem;
  position: relative;
  box-sizing: border-box;
}

h1 {
  margin: 0;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

dl {
  display: grid;
  grid-template-columns: auto auto auto auto auto auto;
  grid-template-rows: auto auto;
  gap: 0.2rem;
}

dt {
  text-align: right;
}

dt::after {
  content: ':';
}

dd {
  margin: 0;
}

dd.rate::after {
  content: '%';
}

#option {
  display: flex;
  justify-content: right;
}

thead {
  background-color: var(--header);
}

tbody:nth-child(odd) {
  background: var(--odd);
}

tbody:nth-child(even) {
  background: var(--even);
}

tbody > tr:first-child > td:first-child {
  vertical-align: top;
}

tbody.exists > tr:first-child > td:first-child {
  background-color: var(--exists);
}

tbody > tr > td:last-child > a::before {
  content: 'URL';
}

td.exists {
  background-color: var(--exists);
}

label {
  user-select: none;
}

body.implemented tbody:not(.exists) {
  display: none;
}

footer {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  height: 3rem;
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
}

footer small {
  display: inline-block;
}

footer small + small {
  margin-left: 0.5rem;
}

footer a {
  display: inline-block;
  margin-left: 0.2rem;
  text-decoration: none;
}