/* Protocol working paper: readable, responsive and entirely code-native. */
.pr-wrap { padding-top: 48px; padding-bottom: 70px; }
.pr-hero { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(285px, 1fr); gap: 48px; align-items: center; margin-bottom: 30px; }
.pr-intro h1 { font: 700 clamp(40px, 6vw, 76px)/1.12 var(--f-display); letter-spacing: -.055em; margin: 18px 0; }
.pr-intro h1 em { color: var(--accent); font-style: normal; }
.pr-intro p { color: var(--ink-2); line-height: 1.9; max-width: 630px; }
.pr-intro .pr-lead { color: var(--ink); font-size: clamp(20px, 2.4vw, 28px); font-weight: 700; margin-bottom: 15px; }
.pr-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.pr-status { padding: 28px; background: var(--navy); color: var(--on-navy); border-radius: var(--r-lg); box-shadow: var(--shadow-lg); }
.pr-status-label { font-size: 12px; color: var(--gold); letter-spacing: .15em; }
.pr-status h2 { color: var(--on-navy); font-size: 25px; margin: 12px 0 8px; }
.pr-status p { font-size: 12px; line-height: 1.9; color: var(--on-navy-2); }
.pr-status .pr-status-detail { color: var(--gold); margin-bottom: 12px; }
.pr-status dl { margin-top: 18px; }
.pr-status dl div { display: flex; justify-content: space-between; gap: 15px; border-top: 1px solid rgba(255,255,255,.13); padding: 12px 0; font-size: 11px; }
.pr-status dt { color: var(--on-navy-2); }
.pr-status dd { margin: 0; text-align: right; }
.pr-current { line-height: 1.9; }
.pr-section { margin-top: 46px; scroll-margin-top: 100px; }
.pr-section-head { display: flex; align-items: center; gap: 14px; margin-bottom: 22px; }
.pr-section h2 { font-size: clamp(20px, 2.5vw, 27px); line-height: 1.5; }
.pr-no { color: var(--accent); background: var(--accent-soft); padding: 7px 9px; font: 700 13px var(--f-mono); border-radius: 8px; }
.pr-section p { color: var(--ink-2); line-height: 1.95; margin: 14px 0; font-size: 14px; }
.pr-table-wrap { overflow-x: auto; border: 1px solid var(--line-2); border-radius: var(--r); background: var(--surface); }
.pr-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.pr-table caption { text-align: left; padding: 15px 20px; color: var(--ink-3); font-size: 12px; }
.pr-table th, .pr-table td { padding: 17px 20px; text-align: left; white-space: normal; border-top: 1px solid var(--line); line-height: 1.8; }
.pr-table thead { background: var(--bg-2); }
.pr-table th:first-child { width: 18%; }
.pr-table td { width: 41%; color: var(--ink-2); }
.pr-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin: 20px 0; }
.pr-cards-two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.pr-card { border: 1px solid var(--line-2); border-radius: var(--r); padding: 24px; background: var(--surface); }
.pr-card h3 { font-size: 16px; }
.pr-card p { margin-bottom: 0; font-size: 13px; }
.pr-formula { background: var(--accent-softer); border-left: 3px solid var(--accent); padding: 20px; border-radius: 0 12px 12px 0; line-height: 1.9; }
.pr-formula b { font-size: 15px; }
.pr-formula small { display: block; color: var(--ink-3); margin-top: 6px; }
.pr-flow { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); list-style: none; gap: 14px; padding: 0; }
.pr-flow li { display: flex; flex-direction: column; gap: 12px; padding: 22px; border-radius: var(--r); background: var(--navy); color: var(--on-navy); }
.pr-flow-no { font: 700 12px var(--f-mono); color: var(--gold); }
.pr-flow small { color: var(--on-navy-2); line-height: 1.8; }
.pr-list { padding-left: 22px; color: var(--ink-2); line-height: 1.95; font-size: 14px; }
.pr-list li { padding: 6px 0 6px 5px; }
.pr-symbol-demo { display: flex; align-items: center; flex-wrap: wrap; gap: 20px; font: 700 27px var(--f-mono); }
.pr-symbol-demo strong { color: var(--accent); }
.pr-milestones { list-style: none; margin: 20px 0; padding: 0; border: 1px solid var(--line-2); border-radius: var(--r); overflow: hidden; background: var(--surface); }
.pr-milestones li { display: grid; grid-template-columns: 180px 1fr; gap: 15px; padding: 20px; border-bottom: 1px solid var(--line); font-size: 13px; line-height: 1.9; }
.pr-milestones li:last-child { border: 0; }
.pr-milestones .is-current { background: var(--accent-softer); }
.pr-milestones span { color: var(--ink-2); }
.pr-sources { display: flex; flex-wrap: wrap; gap: 14px 24px; font-size: 12px; margin-top: 24px; }
.lp-symbol-option { display: flex; align-items: center; gap: 8px; margin-top: 10px; font-size: 12px; color: var(--ink-2); cursor: pointer; }
.lp-symbol-option input { width: 16px; height: 16px; accent-color: var(--accent); }
.lp-symbol-final { display: block; font-size: 12px; line-height: 1.8; margin-top: 8px; color: var(--accent); overflow-wrap: anywhere; }
@media (max-width: 800px) {
  .pr-hero { grid-template-columns: 1fr; gap: 26px; }
  .pr-wrap { padding-top: 26px; }
  .pr-cards { grid-template-columns: 1fr; }
  .pr-flow { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 480px) {
  .pr-status, .pr-card { padding: 20px; }
  .pr-table th, .pr-table td { padding: 12px 9px; font-size: 11px; }
  .pr-flow { grid-template-columns: 1fr; }
  .pr-flow li { display: grid; grid-template-columns: 25px 1fr; gap: 8px; }
  .pr-flow small { grid-column: 2; }
  .pr-milestones li { grid-template-columns: 1fr; gap: 4px; }
  .pr-section { margin-top: 34px; }
}