#container {
  max-width: 100%;
  margin: 50px auto;
  padding: 20px;
  background-color: #fff;
  border-radius: 8px;
  box-shadow: 0 0 15px rgba(0,0,0,0.1);
}

.error {
  color: red;
}

#uris {
  padding: 8px;
}
#uris > div {
  padding: 4px;
}
#uris > .header {
  display: grid;
  grid-template-columns: 1fr 250px 250px 70px;
  background-color: #4caf50;
  color: white;
}
#uris > .row {
  display: grid;
  grid-template-columns: 1fr 250px 250px 70px;
  border-bottom: 1px solid #ddd;
}
#uris > .row:hover {
  background-color: #f5f5f5;
}
#uris > .row > .owner {
  font-family: monospace;
}
#uris > .row > .reader {
  font-family: monospace;
}
#uris > .add {
  display: grid;
  grid-template-columns: 1fr 250px 250px 70px;
}