:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --text: #1d1f23;
  --muted: #5b616b;
  --border: #d9d6cf;
  --accent: #1f5f8b;
  --accent-text: #ffffff;
  --ok: #2d6a3e;
  --error: #a3312a;
  --notice: #f2efe6;
  --quote: #9aa0a8;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15171a;
    --surface: #1d2024;
    --text: #e7e5e0;
    --muted: #a3a8b0;
    --border: #3a3e44;
    --accent: #7db3db;
    --accent-text: #0f1215;
    --ok: #7cc68e;
    --error: #f08a80;
    --notice: #23262b;
    --quote: #6b717a;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

header.top,
main,
footer {
  max-width: 52rem;
  margin: 0 auto;
  padding: 0 16px;
}

header.top {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  align-items: flex-end;
  justify-content: space-between;
  padding-top: 1.5rem;
}

h1 {
  margin: 0;
  font-size: 1.75rem;
}

.tagline {
  margin: 0;
  color: var(--muted);
}

button {
  font: inherit;
  cursor: pointer;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 0.4rem 0.8rem;
}

button:disabled {
  cursor: progress;
  opacity: 0.6;
}

button[type="submit"] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
  margin-top: 0.5rem;
}

.languages button[aria-pressed="true"] {
  border-color: var(--accent);
  font-weight: 600;
}

.notice {
  margin: 1rem 0;
  padding: 0.75rem 1rem;
  background: var(--notice);
  border-radius: 8px;
}

.notice p {
  margin: 0.2rem 0;
}

.status {
  min-height: 1.5em;
  color: var(--muted);
}

.status[data-kind="ok"] {
  color: var(--ok);
}

.status[data-kind="error"] {
  color: var(--error);
  white-space: pre-wrap;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  border-bottom: 1px solid var(--border);
}

.tabs button {
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 6px 6px 0 0;
  background: none;
}

.tabs button[aria-selected="true"] {
  border-color: var(--border);
  background: var(--surface);
  font-weight: 600;
  margin-bottom: -1px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 8px 8px;
  padding: 1rem;
}

form label,
.tools {
  display: block;
  margin: 0.6rem 0;
}

form label > span:first-child,
.tools > span:first-child {
  display: block;
  font-weight: 600;
}

input:not([type="checkbox"]),
select,
textarea {
  font: inherit;
  width: 100%;
  padding: 0.35rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
}

small {
  display: block;
  color: var(--muted);
}

.row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
  gap: 0 1rem;
}

fieldset {
  border: 1px solid var(--border);
  border-radius: 8px;
  margin: 1rem 0;
}

legend {
  font-weight: 600;
  padding: 0 0.3rem;
}

.checks {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
}

.checks label {
  display: inline-block;
  margin: 0.2rem 0;
  font-weight: normal;
}

details {
  margin: 0.6rem 0;
}

summary {
  cursor: pointer;
  color: var(--accent);
}

.result {
  margin: 1.5rem 0;
}

.result-head {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  align-items: center;
  justify-content: space-between;
}

.result-head h2 {
  margin: 0;
}

.downloads {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.warnings:empty {
  display: none;
}

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

.document {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 1.25rem 1rem;
  overflow-wrap: anywhere;
}

.document p {
  white-space: pre-line;
}

.document blockquote {
  margin: 0.75rem 0;
  padding-left: 0.9rem;
  border-left: 3px solid var(--quote);
}

.document hr {
  border: none;
  border-top: 1px solid var(--border);
}

footer {
  color: var(--muted);
  font-size: 0.875rem;
  padding-bottom: 2rem;
}