:root {
  color-scheme: light dark;
  --accent: #003366;
  --border: #c8ccd2;
  --muted: #5b6470;
  --error: #b00020;
}

@media (prefers-color-scheme: dark) {
  :root {
    --accent: #7fb2e5;
    --border: #3a4048;
    --muted: #a3abb5;
    --error: #ff7a8a;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, sans-serif;
  line-height: 1.5;
}

main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 2rem 1rem;
}

h1 {
  color: var(--accent);
  margin-top: 0;
}

.hint {
  color: var(--muted);
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.row {
  display: flex;
  gap: 0.5rem;
}

input {
  flex: 1;
  min-width: 0;
  padding: 0.5rem;
  font: inherit;
  border: 1px solid var(--border);
  border-radius: 4px;
}

button {
  padding: 0.5rem 1rem;
  font: inherit;
  color: #fff;
  background: var(--accent);
  border: 0;
  border-radius: 4px;
  cursor: pointer;
}

@media (prefers-color-scheme: dark) {
  button {
    color: #111;
  }
}

.error {
  color: var(--error);
}

ul {
  list-style: none;
  padding: 0;
  margin-top: 2rem;
}

li {
  padding: 0.75rem 0;
  border-top: 1px solid var(--border);
  overflow-wrap: anywhere;
}

li time {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
}