:root {
  --ink: #1c2430;
  --muted: #5b6675;
  --line: #d8dee7;
  --bg: #f5f7fa;
  --accent: #1f5f8b;
  --accent-ink: #ffffff;
  --notice-bg: #fff6e5;
  --notice-line: #e6b95c;
  --error: #a02121;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
}
a { color: var(--accent); }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.site-header {
  display: flex; justify-content: space-between; align-items: center;
  gap: 1rem; padding: 0.75rem 1.25rem; background: #fff; border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}
.brand a { font-weight: 700; text-decoration: none; color: var(--ink); font-size: 1.05rem; }
.brand .domain { display: block; color: var(--muted); font-size: 0.8rem; }
.site-nav { display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; }
.site-nav a { text-decoration: none; font-weight: 500; }
.site-nav a:hover { text-decoration: underline; }
.logout-form { margin: 0; }
.logout-form button, .button, .filters button, .chat-form button, .login-card button {
  background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 6px;
  padding: 0.45rem 0.9rem; cursor: pointer; font-size: 0.95rem; text-decoration: none; display: inline-block;
}
.content { max-width: 960px; margin: 0 auto; padding: 1.5rem 1.25rem 3rem; }
h1 { margin-top: 0.5rem; }
h2 { margin-top: 2rem; border-bottom: 1px solid var(--line); padding-bottom: 0.3rem; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 1rem; margin: 1.5rem 0; }
.card { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 1rem; text-decoration: none; color: var(--ink); display: flex; flex-direction: column; gap: 0.25rem; }
.card:hover { border-color: var(--accent); }
.card-num { font-size: 1.8rem; font-weight: 700; }
.card-label { color: var(--muted); }
.notice { background: var(--notice-bg); border: 1px solid var(--notice-line); border-radius: 8px; padding: 0.9rem 1rem; }
.error { color: var(--error); font-weight: 600; }
.timeline { list-style: none; padding: 0; }
.timeline-item { display: grid; grid-template-columns: 9rem 1fr; gap: 1rem; border-left: 3px solid var(--accent); padding: 0 0 1.2rem 1rem; margin-left: 0.25rem; }
.timeline-item time { font-weight: 700; color: var(--accent); }
.provider { color: var(--muted); }
.filters { display: flex; gap: 0.5rem; margin: 1rem 0; flex-wrap: wrap; }
.filters input, .filters select, .login-card input, .chat-form textarea {
  padding: 0.5rem; border: 1px solid var(--line); border-radius: 6px; font-size: 1rem; font-family: inherit;
}
.records { width: 100%; border-collapse: collapse; background: #fff; }
.records th, .records td { text-align: left; padding: 0.6rem 0.75rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.records th { background: #eef2f7; }
.meta { display: grid; grid-template-columns: max-content 1fr; gap: 0.25rem 1rem; }
.meta dt { color: var(--muted); }
.pages { display: grid; gap: 1.5rem; }
.page { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 1rem; }
.page img { max-width: 100%; height: auto; border: 1px solid var(--line); }
pre.ocr { white-space: pre-wrap; font-size: 0.85rem; background: #f0f3f7; padding: 0.75rem; border-radius: 6px; max-height: 24rem; overflow: auto; }
.breadcrumb { margin-top: 0; }
.chat { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 1rem; max-width: 720px; }
.chat-log { display: flex; flex-direction: column; gap: 0.5rem; min-height: 12rem; max-height: 26rem; overflow-y: auto; padding: 0.5rem; }
.chat-msg { padding: 0.55rem 0.8rem; border-radius: 12px; max-width: 85%; white-space: pre-wrap; }
.chat-msg.assistant { background: #eef2f7; align-self: flex-start; }
.chat-msg.user { background: var(--accent); color: #fff; align-self: flex-end; }
.chat-msg.error { background: #fdecec; color: var(--error); align-self: stretch; }
.chat-form { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.75rem; align-items: flex-end; }
.chat-form textarea { flex: 1 1 auto; resize: vertical; }
.chat-form button { flex: 0 0 auto; }
.chat-modes, .chat-operation { flex: 1 1 100%; }
.chat-modes { border: 0; padding: 0; margin: 0; display: flex; gap: 1rem; }
.chat-modes label { font-weight: 600; }
.chat-operation { display: flex; gap: 0.5rem; align-items: center; }
.chat-operation label { font-weight: 600; }
.chat-operation input {
  flex: 1; padding: 0.5rem; border: 1px solid var(--line); border-radius: 6px;
  font-size: 1rem; font-family: inherit;
}
.login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-card { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 2rem; width: min(92vw, 380px); }
.login-card label { display: block; margin: 0.75rem 0 0.25rem; font-weight: 600; }
.login-card input { width: 100%; }
.login-card button { width: 100%; margin-top: 1.25rem; }
.site-footer { max-width: 960px; margin: 0 auto; padding: 1rem 1.25rem 2rem; color: var(--muted); font-size: 0.82rem; }
.stage { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 1rem 1.25rem 1.25rem; margin: 1.5rem 0; }
.stage h2 { border-bottom: 1px solid var(--line); padding-bottom: 0.3rem; margin-top: 0.25rem; }
.stage-order {
  display: inline-block; min-width: 1.7rem; height: 1.7rem; line-height: 1.7rem; text-align: center;
  background: var(--accent); color: var(--accent-ink); border-radius: 50%; font-size: 0.95rem; margin-right: 0.5rem;
}
.stage-summary { font-size: 1.02rem; }
.cascade { background: #eef2f7; border-left: 3px solid var(--accent); padding: 0.6rem 0.85rem; border-radius: 0 6px 6px 0; }
.research-section { border-top: 1px solid var(--line); padding-top: 1rem; margin-top: 1rem; }
.research-section h3 { margin-bottom: 0.25rem; }
.evidence { display: inline-block; font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.03em; color: var(--muted); margin: 0 0 0.5rem; }
.evidence-established { color: #1c6b3a; }
.evidence-experimental { color: #8a5a00; }
.evidence-preclinical { color: #8a5a00; }
.evidence-mixed { color: #8a5a00; }
.evidence-unsupported { color: var(--error); }
.body-md p { margin: 0.5rem 0; }
.plain-speech { background: #f0f7f2; border: 1px solid #cfe4d7; border-radius: 8px; padding: 0.6rem 0.85rem; margin: 0.75rem 0; }
.plain-speech h4, .citations h4 { margin: 0 0 0.35rem; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.03em; color: var(--muted); }
.plain-speech p { margin: 0; }
.citations ol { margin: 0.25rem 0 0; padding-left: 1.2rem; }
.citations li { margin: 0.3rem 0; }
.citation-id { color: var(--muted); font-size: 0.82rem; margin-left: 0.4rem; white-space: nowrap; }