:root {
  color-scheme: light;
  --bg: #f5f6f8;
  --panel: #fff;
  --text: #162434;
  --line: #c7d3df;
  --link: #164e9a;
}
html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #101925;
  --panel: #1b293b;
  --text: #eef4fc;
  --line: #435b76;
  --link: #a6caff;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font:
    16px/1.55 system-ui,
    sans-serif;
}
header,
main,
footer {
  max-width: 1120px;
  margin: auto;
  padding: 1.4rem;
}
header {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.brand {
  width: 180px;
  height: auto;
}
h1 {
  font-size: 1.4rem;
}
h2 {
  font-size: 1.2rem;
}
section,
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.2rem;
  margin: 1rem 0;
}
form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}
label {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
label:has(input[type="checkbox"]) {
  display: block;
}
input,
select,
button {
  font: inherit;
  padding: 0.55rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
  max-width: 100%;
}
button {
  cursor: pointer;
  margin: 0.2rem;
}
button:hover {
  outline: 2px solid var(--link);
}
a {
  color: var(--link);
}
pre {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-size: 0.85rem;
}
.notice {
  border-left: 4px solid #c18b31;
  padding: 1rem;
}
footer {
  text-align: center;
  border-top: 1px solid var(--line);
  margin-top: 2rem;
}
[hidden] {
  display: none !important;
}
@media (max-width: 480px) {
  header,
  main,
  footer {
    padding: 1rem;
  }
  form {
    grid-template-columns: 1fr;
  }
}
form > * {
  min-width: 0;
}
section,
.card,
label {
  min-width: 0;
  overflow-wrap: anywhere;
}
input:not([type="checkbox"]),
select {
  width: 100%;
  min-width: 0;
}
pre {
  max-width: 100%;
  overflow: auto;
}
@media (max-width: 480px) {
  form {
    grid-template-columns: minmax(0, 1fr);
  }
}