/* meetLab — Paper reading surface
 * Editorial, RFC-adjacent. Three-column: nav · prose · marginalia.
 * Built on colors_and_type.css — no new color tokens.
 */

/* ---------- shared nav (logo menu) ---------- */
.nav { position: sticky; top: 0; z-index: 40; display: flex; align-items: center; justify-content: space-between; padding: 14px 40px; background: var(--ml-paper); border-bottom: 1px solid var(--ml-border); }
.nav-left { display: flex; align-items: center; gap: 48px; }
.logo-wrap { position: relative; }
.logo-btn { display: inline-flex; align-items: center; gap: 8px; background: none; border: 0; padding: 4px 8px 4px 4px; cursor: pointer; border-radius: 4px; transition: background 140ms var(--ml-ease); }
.logo-btn:hover { background: var(--ml-paper-2); }
.logo-btn img { height: 18px; display: block; }
.logo-btn .chev { font-family: var(--ml-mono); font-size: 10px; color: var(--ml-fg-mute); transition: transform 140ms var(--ml-ease); }
.logo-btn[aria-expanded="true"] .chev { transform: rotate(180deg); color: var(--ml-ink); }
.logo-menu { position: absolute; top: calc(100% + 10px); left: 0; min-width: 340px; background: var(--ml-surface); border: 1px solid var(--ml-ink); box-shadow: var(--ml-shadow-pop); padding: 8px; display: none; }
.logo-menu[data-open="true"] { display: block; }
.logo-menu .mhead { font-family: var(--ml-mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ml-fg-mute); padding: 10px 12px 8px; display: flex; justify-content: space-between; }
.logo-menu .mitem { display: grid; grid-template-columns: 92px 1fr auto; gap: 12px; align-items: center; padding: 10px 12px; text-decoration: none; color: var(--ml-ink); border-radius: 2px; transition: background 140ms var(--ml-ease); }
.logo-menu .mitem:hover { background: var(--ml-paper-2); }
.logo-menu .mitem[aria-current="page"] { background: var(--ml-ink); color: var(--ml-paper); }
.logo-menu .mitem[aria-current="page"] .mdesc, .logo-menu .mitem[aria-current="page"] .marrow { color: var(--ml-dark-mute); }
.logo-menu .mlabel { font-weight: 500; font-size: 14px; }
.logo-menu .mdesc { font-family: var(--ml-mono); font-size: 11px; color: var(--ml-fg-mute); letter-spacing: 0.04em; }
.logo-menu .marrow { font-family: var(--ml-mono); font-size: 12px; color: var(--ml-fg-mute); }
.logo-menu hr { border: 0; border-top: 1px solid var(--ml-border); margin: 6px 0; }

.nav-links { display: flex; list-style: none; margin: 0; padding: 0; gap: 4px; }
.nav-links a { display: flex; flex-direction: column; gap: 2px; padding: 7px 14px; border-radius: 4px; text-decoration: none; color: var(--ml-ink); transition: background 140ms var(--ml-ease); }
.nav-links a:hover { background: var(--ml-paper-2); }
.nav-links .label { font-size: 13px; font-weight: 500; line-height: 1; white-space: nowrap; }
.nav-links .hint { font-family: var(--ml-mono); font-size: 10px; letter-spacing: 0.04em; color: var(--ml-fg-mute); }
.nav-right { display: flex; align-items: center; gap: 10px; }
.nav-right a { font-size: 13px; color: var(--ml-ink); text-decoration: none; padding: 8px 12px; }
.btn-book { font-family: var(--ml-sans); font-size: 13px; font-weight: 500; padding: 9px 16px; border-radius: 4px; background: var(--ml-ink); color: var(--ml-paper); border: 0; cursor: pointer; display: inline-flex; align-items: center; gap: 8px; }
.btn-book:hover { background: #000; }

/* ---------- paper masthead ---------- */
.paper-head {
  max-width: 1200px;
  margin: 0 auto;
  padding: 64px 40px 48px;
  border-bottom: 1px solid var(--ml-ink);
}
.crumbs {
  font-family: var(--ml-mono); font-size: 11px; letter-spacing: 0.08em;
  color: var(--ml-fg-mute); text-transform: uppercase;
  display: flex; gap: 10px; align-items: center; flex-wrap: wrap;
}
.crumbs a { color: var(--ml-fg-mute); text-decoration: none; }
.crumbs a:hover { color: var(--ml-ink); }
.crumbs .sep { color: var(--ml-border-strong); }
.crumbs .here { color: var(--ml-ink); }

.paper-title {
  font-family: var(--ml-sans); font-weight: 500;
  font-size: 64px; line-height: 1.03; letter-spacing: -0.025em;
  margin: 24px 0 0; color: var(--ml-ink);
  max-width: 980px; text-wrap: balance;
}
.paper-tagline {
  margin-top: 22px; max-width: 720px;
  font-size: 19px; line-height: 1.55; color: var(--ml-ink-2);
}

.paper-meta {
  margin-top: 40px;
  display: grid; grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  padding-top: 20px; border-top: 1px dashed var(--ml-border);
}
.paper-meta .cell { display: flex; flex-direction: column; gap: 4px; }
.paper-meta .k {
  font-family: var(--ml-mono); font-size: 10px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--ml-fg-mute);
}
.paper-meta .v {
  font-family: var(--ml-mono); font-size: 13px; color: var(--ml-ink);
  display: flex; align-items: center; gap: 6px;
}
.status-pill {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--ml-mono); font-size: 11px; font-weight: 500;
  padding: 3px 8px; border-radius: 999px;
  background: var(--ml-paper-2); color: var(--ml-ink);
  border: 1px solid var(--ml-border-strong);
  letter-spacing: 0.06em; text-transform: uppercase;
}
.status-pill .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--ml-ink); }
.status-pill.stable { background: var(--ml-blue-tint); color: var(--ml-blue); border-color: var(--ml-blue-line); }
.status-pill.stable .dot { background: var(--ml-blue); }
.status-pill.memo { background: var(--ml-paper-2); color: var(--ml-ink-2); }
.status-pill.memo .dot { background: var(--ml-ink-2); }
.status-pill.synth { background: var(--ml-orange-tint); color: var(--ml-orange); border-color: var(--ml-orange-line); }
.status-pill.synth .dot { background: var(--ml-orange); }

/* ---------- three-column reading surface ---------- */
.paper-body {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 40px 64px;
  display: grid;
  grid-template-columns: 200px minmax(0, 680px) 1fr;
  gap: 48px;
  align-items: start;
}

/* left: section nav */
.toc {
  position: sticky; top: 76px;
  align-self: start;
  font-family: var(--ml-mono); font-size: 11px;
  letter-spacing: 0.04em;
  padding-top: 8px;
}
.toc-head {
  font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--ml-fg-mute);
  padding-bottom: 10px; border-bottom: 1px solid var(--ml-ink);
  margin-bottom: 10px;
}
.toc ol { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.toc li a {
  display: grid; grid-template-columns: 34px 1fr; gap: 8px; align-items: baseline;
  padding: 5px 0; text-decoration: none; color: var(--ml-ink-2);
  border-left: 2px solid transparent;
  padding-left: 8px; margin-left: -10px;
  transition: border-color 140ms var(--ml-ease), color 140ms var(--ml-ease);
}
.toc li a:hover { color: var(--ml-ink); }
.toc li a.active { color: var(--ml-ink); border-left-color: var(--ml-ink); }
.toc .num { color: var(--ml-fg-mute); }

/* center: prose */
.prose { color: var(--ml-ink-2); font-size: 16px; line-height: 1.7; }

.sec { padding: 48px 0 0; scroll-margin-top: 88px; }
.sec:first-child { padding-top: 0; }
.sec-rule {
  display: grid; grid-template-columns: 48px 1fr;
  gap: 16px; align-items: baseline;
  padding-bottom: 12px; margin-bottom: 24px;
  border-bottom: 1px solid var(--ml-ink);
}
.sec-num {
  font-family: var(--ml-mono); font-size: 12px; font-weight: 500;
  letter-spacing: 0.08em; color: var(--ml-fg-mute);
}
.sec-h {
  font-family: var(--ml-sans); font-weight: 500;
  font-size: 32px; letter-spacing: -0.015em; line-height: 1.1;
  color: var(--ml-ink); margin: 0;
}
.sec-sub {
  font-family: var(--ml-sans); font-weight: 500;
  font-size: 19px; line-height: 1.25; color: var(--ml-ink);
  margin: 32px 0 10px; letter-spacing: -0.005em;
}
.sec-sub-mono {
  font-family: var(--ml-mono); font-size: 12px;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--ml-fg-mute);
  margin: 28px 0 10px;
}

.prose p { margin: 0 0 18px; color: var(--ml-ink-2); font-size: 16px; line-height: 1.7; }
.prose p:last-child { margin-bottom: 0; }
.prose ul, .prose ol {
  margin: 0 0 20px; padding: 0 0 0 0;
  list-style: none;
}
.prose ul li, .prose ol li {
  position: relative; padding: 4px 0 4px 26px;
  color: var(--ml-ink-2); font-size: 16px; line-height: 1.65;
}
.prose ul li::before {
  content: ""; position: absolute; left: 0; top: 14px;
  width: 14px; height: 1px; background: var(--ml-line-strong);
}
.prose ol { counter-reset: ol; }
.prose ol li { counter-increment: ol; }
.prose ol li::before {
  content: counter(ol, decimal-leading-zero);
  position: absolute; left: 0; top: 4px;
  font-family: var(--ml-mono); font-size: 11px;
  color: var(--ml-fg-mute); letter-spacing: 0.04em;
}

.prose strong { font-weight: 600; color: var(--ml-ink); }
.prose em { font-style: normal; background: var(--ml-paper-2); padding: 0 3px; }
.prose code {
  font-family: var(--ml-mono); font-size: 13px;
  padding: 1px 5px; border-radius: 2px;
  background: var(--ml-paper-2);
  border: 1px solid var(--ml-border);
  color: var(--ml-ink);
}
.prose a.term {
  color: var(--ml-ink);
  text-decoration: underline; text-decoration-style: dotted;
  text-decoration-color: var(--ml-blue); text-underline-offset: 3px;
}
.prose a.term:hover { background: var(--ml-blue-tint); }

/* pre/code blocks */
.prose pre, .prose .block {
  font-family: var(--ml-mono); font-size: 12.5px; line-height: 1.6;
  color: var(--ml-ink);
  background: var(--ml-paper-2);
  border: 1px solid var(--ml-border);
  border-left: 2px solid var(--ml-ink);
  padding: 18px 22px;
  margin: 22px 0;
  overflow-x: auto;
  white-space: pre;
}
.prose pre.compact { padding: 14px 18px; font-size: 12px; }
.prose .block-label {
  font-family: var(--ml-mono); font-size: 10px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--ml-fg-mute);
  margin: 22px 0 -16px; padding-left: 2px;
  display: flex; justify-content: space-between; align-items: baseline;
}

/* tables */
.prose table {
  width: 100%; border-collapse: collapse; margin: 22px 0;
  font-size: 14px;
}
.prose thead th {
  text-align: left; padding: 10px 12px;
  font-family: var(--ml-mono); font-size: 10px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--ml-fg-mute);
  border-top: 1px solid var(--ml-ink);
  border-bottom: 1px solid var(--ml-ink);
}
.prose tbody td {
  padding: 12px; border-bottom: 1px dashed var(--ml-border);
  vertical-align: top; color: var(--ml-ink-2); line-height: 1.5;
}
.prose tbody tr:last-child td { border-bottom: 1px solid var(--ml-border-strong); }
.prose td.mono { font-family: var(--ml-mono); font-size: 12.5px; color: var(--ml-ink); }

/* callout: bracketed meta-notes like [ESCALATION CONTRACT — DEFERRED] */
.callout {
  margin: 26px 0; padding: 18px 20px;
  background: var(--ml-orange-tint);
  border: 1px solid var(--ml-orange-line);
  border-left: 3px solid var(--ml-orange);
  font-size: 14.5px; line-height: 1.6;
  color: var(--ml-ink);
}
.callout .label {
  font-family: var(--ml-mono); font-size: 10px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--ml-orange-press);
  margin-bottom: 8px; font-weight: 600;
}
.callout.info {
  background: var(--ml-blue-tint); border-color: var(--ml-blue-line);
  border-left-color: var(--ml-blue);
}
.callout.info .label { color: var(--ml-blue-press); }
.callout.neutral {
  background: var(--ml-paper-2); border-color: var(--ml-border-strong);
  border-left-color: var(--ml-ink);
}
.callout.neutral .label { color: var(--ml-ink); }

/* decision-table style */
.decision {
  margin: 26px 0; border: 1px solid var(--ml-ink);
  display: grid; grid-template-columns: 1fr 1.4fr;
}
.decision .dr {
  display: contents;
}
.decision .dk, .decision .dv {
  padding: 12px 16px;
  font-size: 14px; line-height: 1.55;
  border-bottom: 1px dashed var(--ml-border);
}
.decision .dk {
  font-family: var(--ml-mono); font-size: 12px; color: var(--ml-ink);
  background: var(--ml-paper-2);
  border-right: 1px solid var(--ml-border);
  font-weight: 500;
}
.decision .dv { color: var(--ml-ink-2); }
.decision .dr:last-child .dk, .decision .dr:last-child .dv { border-bottom: 0; }

/* pipeline diagram — the mechanism in prose */
.mech {
  margin: 28px 0;
  padding: 22px 26px;
  background: var(--ml-dark);
  color: var(--ml-dark-ink);
  border: 1px solid var(--ml-ink);
  font-family: var(--ml-mono); font-size: 13px; line-height: 1.5;
  display: flex; flex-wrap: wrap; gap: 14px 10px; align-items: center;
}
.mech .step { color: var(--ml-dark-ink); }
.mech .arrow { color: var(--ml-dark-mute); }
.mech .pass { color: var(--ml-blue); font-weight: 600; letter-spacing: 0.04em; }
.mech .halt { color: var(--ml-orange); font-weight: 600; letter-spacing: 0.04em; }
.mech .label {
  position: relative; top: -14px; left: 0;
  font-family: var(--ml-mono); font-size: 10px;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--ml-dark-mute);
  display: block; margin-bottom: -4px; width: 100%;
}

/* right: marginalia */
.margin { display: flex; flex-direction: column; gap: 24px; padding-top: 8px; }
.mg-card {
  border: 1px solid var(--ml-border);
  background: var(--ml-surface);
  padding: 16px;
}
.mg-card .mg-head {
  font-family: var(--ml-mono); font-size: 10px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--ml-fg-mute);
  padding-bottom: 10px; margin-bottom: 12px;
  border-bottom: 1px dashed var(--ml-border);
}
.mg-card .mg-title {
  font-weight: 500; font-size: 15px; letter-spacing: -0.005em;
  color: var(--ml-ink);
}
.mg-card p { font-size: 13px; line-height: 1.55; color: var(--ml-ink-2); margin: 8px 0 0; }
.mg-card ul { list-style: none; margin: 10px 0 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.mg-card ul li {
  font-family: var(--ml-mono); font-size: 12px;
  padding-left: 16px; position: relative; color: var(--ml-ink);
}
.mg-card ul li::before {
  content: "→"; position: absolute; left: 0; color: var(--ml-fg-mute);
}
.mg-card ul li a { color: var(--ml-ink); text-decoration: none; border-bottom: 1px dashed var(--ml-border-strong); }
.mg-card ul li a:hover { border-bottom-color: var(--ml-ink); }

.pullquote {
  padding: 18px 0; border-top: 1px solid var(--ml-ink); border-bottom: 1px solid var(--ml-ink);
  font-family: var(--ml-sans); font-weight: 500;
  font-size: 18px; line-height: 1.35; letter-spacing: -0.01em;
  color: var(--ml-ink);
}
.pullquote .attr {
  display: block; margin-top: 10px;
  font-family: var(--ml-mono); font-size: 10px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--ml-fg-mute); font-weight: 400;
}

/* ---------- paper footer: prev/next ---------- */
.paper-foot {
  max-width: 1200px; margin: 0 auto;
  padding: 48px 40px 96px;
  border-top: 1px solid var(--ml-ink);
  display: grid; grid-template-columns: 1fr 1fr; gap: 24px;
}
.paper-foot a {
  display: flex; flex-direction: column; gap: 6px;
  padding: 20px 22px; border: 1px solid var(--ml-border);
  text-decoration: none; color: var(--ml-ink);
  background: var(--ml-surface);
  transition: border-color 140ms var(--ml-ease), background 140ms var(--ml-ease);
}
.paper-foot a:hover { border-color: var(--ml-ink); background: var(--ml-paper-2); }
.paper-foot .dir {
  font-family: var(--ml-mono); font-size: 10px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--ml-fg-mute);
  display: flex; justify-content: space-between;
}
.paper-foot .nxt {
  font-family: var(--ml-sans); font-weight: 500; font-size: 18px;
  line-height: 1.3; letter-spacing: -0.005em;
}
.paper-foot .right { text-align: right; }
.paper-foot .right .dir { flex-direction: row-reverse; }

/* ---------- footer strip ---------- */
.mech-strip {
  max-width: 1200px; margin: 0 auto; padding: 24px 40px;
  border-top: 1px dashed var(--ml-border);
  display: flex; align-items: center; justify-content: space-between;
  font-family: var(--ml-mono); font-size: 12px;
  color: var(--ml-fg-mute); letter-spacing: 0.06em;
}
.mech-strip .flow { color: var(--ml-ink); }
.mech-strip .pass { color: var(--ml-blue); }
.mech-strip .halt { color: var(--ml-orange); }

/* ---------- paper index page specifics ---------- */
.papers-page { max-width: 1200px; margin: 0 auto; padding: 56px 40px 96px; }
.papers-hero { border-bottom: 1px solid var(--ml-ink); padding-bottom: 48px; display: grid; grid-template-columns: 1.25fr 0.85fr; gap: 64px; align-items: end; }
.papers-hero h1 { font-weight: 500; font-size: 76px; line-height: 1.02; letter-spacing: -0.03em; margin: 20px 0 0; }
.papers-hero .lede { margin-top: 24px; font-size: 18px; line-height: 1.55; color: var(--ml-ink-2); max-width: 560px; }
.papers-hero .summary { padding: 18px 20px; border: 1px solid var(--ml-border-strong); background: var(--ml-surface); }
.papers-hero .summary h3 { font-family: var(--ml-mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ml-fg-mute); margin: 0 0 12px; font-weight: 500; }
.papers-hero .summary dl { display: grid; grid-template-columns: 1fr auto; gap: 8px 16px; margin: 0; font-family: var(--ml-mono); font-size: 12px; }
.papers-hero .summary dt { color: var(--ml-ink-2); }
.papers-hero .summary dd { margin: 0; color: var(--ml-ink); text-align: right; }

.papers-grid { margin-top: 56px; }
.papers-section-head { display: flex; align-items: baseline; justify-content: space-between; padding: 0 0 14px; margin-top: 40px; border-bottom: 1px solid var(--ml-ink); }
.papers-section-head h2 { font-weight: 500; font-size: 26px; letter-spacing: -0.01em; margin: 0; }
.papers-section-head .meta { font-family: var(--ml-mono); font-size: 11px; letter-spacing: 0.06em; color: var(--ml-fg-mute); }

.paper-row {
  display: grid;
  grid-template-columns: 64px 1fr 220px 120px 40px;
  gap: 20px; align-items: center;
  padding: 22px 4px 22px 12px;
  border-bottom: 1px solid var(--ml-border);
  text-decoration: none; color: var(--ml-ink);
  transition: background 140ms var(--ml-ease);
}
.paper-row:hover { background: var(--ml-paper-2); }
.paper-row.locked { opacity: 0.55; pointer-events: none; }
.paper-row .pid { font-family: var(--ml-mono); font-size: 11px; letter-spacing: 0.06em; color: var(--ml-fg-mute); }
.paper-row .ptitle { font-weight: 500; font-size: 19px; letter-spacing: -0.01em; line-height: 1.3; }
.paper-row .pdesc { margin-top: 4px; font-size: 13px; color: var(--ml-ink-2); line-height: 1.5; }
.paper-row .ptag { font-family: var(--ml-mono); font-size: 11px; letter-spacing: 0.04em; color: var(--ml-ink); }
.paper-row .pstatus { justify-self: start; }
.paper-row .parr { justify-self: end; font-family: var(--ml-mono); color: var(--ml-ink); font-size: 14px; transition: transform 140ms var(--ml-ease); }
.paper-row:hover .parr { transform: translateX(2px); }