:root {
  --bg: #FBFBFA;
  --surface: #FFFFFF;
  --border: #EAEAEA;
  --text: #2F3437;
  --muted: #787774;
  --ink: #111111;
  --green-bg: #EDF3EC; --green: #346538;
  --yellow-bg: #FBF3DB; --yellow: #956400;
  --red-bg: #FDEBEC; --red: #9F2F2D;
  --blue-bg: #E1F3FE; --blue: #1F6C9F;
  --grey-bg: #F1F1EF; --grey: #6B6A67;
  --sans: "SF Pro Display", "Geist Sans", "Helvetica Neue", system-ui, sans-serif;
  --serif: "Newsreader", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --mono: "Geist Mono", "SF Mono", "JetBrains Mono", ui-monospace, monospace;
  color-scheme: light;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.6 var(--sans); }
main { max-width: 760px; margin: 0 auto; padding: 72px 16px 96px; }

h1 { font: 500 44px/1.1 var(--serif); letter-spacing: -0.03em; color: var(--ink); margin: 0 0 12px; }
.tagline { margin: 0 0 48px; color: var(--muted); max-width: 56ch; }

label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 8px; }
textarea {
  width: 100%; min-height: 220px; resize: vertical; padding: 16px;
  font: 13px/1.55 var(--mono); color: var(--text);
  background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
}
textarea:focus { outline: none; border-color: #C9C9C6; }

.controls { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 12px; }
button { font: 500 14px var(--sans); padding: 9px 18px; border-radius: 6px; cursor: pointer; transition: background .15s, transform .1s; }
button:active { transform: scale(0.98); }
button:disabled { opacity: .45; cursor: default; transform: none; }
.primary { background: var(--ink); color: #fff; border: 1px solid var(--ink); }
.primary:hover:not(:disabled) { background: #333; }
.secondary { background: var(--surface); color: var(--text); border: 1px solid var(--border); }
.secondary:hover:not(:disabled) { background: #F4F4F2; }
#count { margin-left: auto; font-family: var(--mono); font-size: 12px; }
#count.over { color: var(--red); }

.meta { color: var(--muted); font-size: 13px; margin: 8px 0 0; }
.results { margin-top: 56px; }
.status { font-family: var(--mono); font-size: 13px; color: var(--muted); margin: 0; min-height: 1.6em; }
.status.error { color: var(--red); }
.summary { font: 500 22px/1.3 var(--serif); letter-spacing: -0.01em; color: var(--ink); margin: 8px 0 0; }
.summary:empty, .meta:empty { display: none; }
#cards { margin-top: 24px; display: grid; gap: 12px; }

.card {
  background: var(--surface); border: 1px solid var(--border); border-left: 3px solid var(--tone);
  border-radius: 8px; padding: 20px 24px;
  animation: enter .5s cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes enter { from { opacity: 0; transform: translateY(8px); } }
.card-head { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.badge {
  font: 600 11px var(--sans); letter-spacing: .05em; text-transform: uppercase;
  padding: 3px 9px; border-radius: 9999px; background: var(--tone-bg); color: var(--tone);
}
.num { font: 12px var(--mono); color: var(--muted); }
.claim { margin: 0 0 12px; color: var(--ink); }

.tone-green { --tone: var(--green); --tone-bg: var(--green-bg); }
.tone-yellow { --tone: var(--yellow); --tone-bg: var(--yellow-bg); }
.tone-red { --tone: var(--red); --tone-bg: var(--red-bg); }
.tone-blue { --tone: var(--blue); --tone-bg: var(--blue-bg); }
.tone-grey { --tone: var(--grey); --tone-bg: var(--grey-bg); }

.parts { list-style: none; padding: 0; margin: 0 0 12px; border-top: 1px solid var(--border); }
.parts li { padding: 10px 0; border-bottom: 1px solid var(--border); }
.part-head { display: flex; gap: 10px; align-items: baseline; }
.tag { flex: none; font: 11px var(--mono); text-transform: uppercase; letter-spacing: .04em; color: var(--tone); min-width: 9.5em; }
blockquote { margin: 6px 0 0 calc(9.5em + 10px); padding-left: 12px; border-left: 2px solid var(--border); font: italic 14px/1.55 var(--serif); color: var(--text); }
.rejected { margin: 6px 0 0 calc(9.5em + 10px); font-size: 13px; color: var(--muted); }
.reason { margin: 0 0 10px; font-size: 14px; color: var(--muted); }
.source { font: 12px var(--mono); color: var(--blue); word-break: break-all; text-decoration: none; }
.source:hover { text-decoration: underline; }
.source-plain { font: 12px var(--mono); color: var(--muted); word-break: break-all; }

.nolinks { margin-top: 8px; padding: 24px; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; }
.nolinks[hidden] { display: none; }
.nolinks p { margin: 0 0 10px; }
.nolinks-msg { font: 500 20px/1.35 var(--serif); color: var(--ink); letter-spacing: -0.01em; }
.prompt-box { display: flex; gap: 12px; align-items: flex-start; margin-top: 14px; padding: 14px 16px; background: var(--bg); border: 1px solid var(--border); border-radius: 6px; }
.prompt-text { flex: 1; margin: 0 !important; font: 13px/1.55 var(--mono); color: var(--text); }
.prompt-box button { flex: none; }

details { margin-top: 24px; border-bottom: 1px solid var(--border); }
details summary { cursor: pointer; padding: 12px 0; font-size: 14px; color: var(--muted); list-style: none; }
details summary::before { content: "+"; display: inline-block; width: 1.2em; font-family: var(--mono); }
details[open] summary::before { content: "\2212"; }
details ul { margin: 0 0 16px; padding-left: 1.2em; color: var(--muted); font-size: 14px; }
details li { margin-bottom: 6px; }

@media (max-width: 560px) {
  main { padding-top: 40px; }
  h1 { font-size: 36px; }
  .part-head { flex-direction: column; gap: 2px; }
  blockquote, .rejected { margin-left: 0; }
  .prompt-box { flex-direction: column; }
}