/* PABCD Initiative docs-site — design lock v2 (Swiss international typographic)
   Tokens sourced from DESIGN.md element ledger (r1_03 user-selected winner). */

:root {
  --paper: #fbfbf9;
  --ink: #111111;
  --ink-soft: #3d3c38;
  --accent: #e63312;
  --line: #dad8d2;
  --line-dark: #b9b6ae;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  --sans-display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --sans-body: "Pretendard Variable", Pretendard, -apple-system, "Apple SD Gothic Neo",
    "Malgun Gothic", sans-serif;
  --gutter: 24px;
  --measure: 66ch;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans-body);
  font-size: 1.0625rem;
  line-height: 1.72;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }

/* Cutout assets: generated on pure #ffffff then crushed; multiply makes the
   white read as the paper itself (FE-ASSET-BG-01). */
.cutout {
  mix-blend-mode: multiply;
}
.blend-scope {
  isolation: isolate;
  background: var(--paper);
}

/* ---------- meta bar ---------- */
.meta-bar {
  display: flex;
  align-items: stretch;
  border-bottom: 1px solid var(--ink);
  font-family: var(--mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0;
  line-height: 1;
}
.meta-bar span,
.meta-bar a {
  padding: 14px 18px;
  border-right: 1px solid var(--line);
  white-space: nowrap;
}
.meta-bar .grow { flex: 1; border-right: none; }
.meta-bar .right { border-right: none; border-left: 1px solid var(--line); }
.meta-bar a { color: inherit; text-decoration: none; }
.meta-bar a:hover { color: var(--accent); }
@media (max-width: 860px) {
  .meta-bar .hide-m { display: none; }
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  /* height follows the viewport but is capped by width so tall/narrow
     desktops don't leave a type-less void (reference aspect ~3:2) */
  min-height: min(calc(100svh - 210px), 60vw);
  background-image: url("hero_grid_paper.png");
  background-size: cover;
  background-position: center;
  border-bottom: 1px solid var(--ink);
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  grid-template-rows: 1fr auto;
  padding: clamp(28px, 5vh, 64px) var(--gutter) 28px;
  column-gap: 48px;
}

.masthead {
  align-self: start;
  font-family: var(--sans-display);
  font-weight: 800;
  line-height: 0.8;
  user-select: none;
}
.mast-line { display: flex; align-items: flex-start; gap: 0.08em; }
.mast-line .word { font-size: var(--mast-size); }
.mast-square {
  width: 0.42em;
  height: 0.42em;
  background: var(--accent);
  margin-top: 0.06em;
  margin-left: 0.14em;
  font-size: var(--mast-size);
  flex: none;
}
.mast-sub {
  display: flex;
  align-items: baseline;
  gap: 0.35em;
}
.mast-initiative {
  font-family: var(--sans-display);
  font-weight: 500;
  font-size: clamp(1.5rem, 3.2vh, 2.75rem);
  line-height: 1;
  align-self: flex-end;
  padding-bottom: 0.08em;
}
:root { --mast-size: 15rem; }
@media (min-width: 1501px) { :root { --mast-size: 18rem; } }
@media (min-width: 1750px) { :root { --mast-size: 21.5rem; } }
@media (min-width: 2100px) { :root { --mast-size: 25rem; } }
@media (max-width: 1500px) { :root { --mast-size: 17rem; } }
@media (max-width: 1180px) { :root { --mast-size: 13rem; } }
@media (max-width: 1023px) { :root { --mast-size: 11rem; } }
@media (max-width: 900px)  { :root { --mast-size: 9.5rem; } }
@media (max-width: 640px)  { :root { --mast-size: 5.5rem; } }
@media (max-width: 420px)  { :root { --mast-size: 4.6rem; } }

.hero-desc {
  grid-column: 1;
  align-self: end;
  max-width: 560px;
  border-top: 1px solid var(--line-dark);
  padding-top: 20px;
  margin-top: 24px;
}
.hero-desc h1 {
  font-family: var(--sans-body);
  font-weight: 800;
  font-size: 1.0625rem;
  margin: 0 0 6px;
  text-wrap: balance;
}
.hero-desc p {
  font-family: var(--mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0;
}

/* sequence figure (P/A/B/C/D state bars) */
.seq-figure {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: stretch;
  width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-evenly;
  border-left: 1px solid var(--line-dark);
  padding: 12px 0 12px clamp(28px, 3.5vw, 64px);
}
.seq-row {
  display: grid;
  grid-template-columns: 56px 1fr;
  align-items: center;
  margin: 0;
}
.seq-letter {
  font-family: var(--sans-display);
  font-weight: 700;
  font-size: 2.125rem;
  line-height: 1;
}
.seq-track { position: relative; height: 34px; }
.seq-label {
  position: absolute;
  top: 0;
  font-family: var(--mono);
  font-size: 0.75rem;
  text-transform: uppercase;
}
.seq-bar {
  position: absolute;
  bottom: 6px;
  height: 2px;
  background: var(--ink);
}
.seq-bar::after {
  content: "";
  position: absolute;
  right: 0;
  top: -5px;
  width: 2px;
  height: 12px;
  background: var(--ink);
}
.seq-axis {
  position: relative;
  border-top: 1px solid var(--ink);
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 0.625rem;
  padding-top: 6px;
  color: var(--ink-soft);
}

@media (max-width: 1023px) {
  .hero {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    row-gap: 36px;
    min-height: calc(100svh - 250px);
  }
  .seq-figure {
    grid-column: 1;
    grid-row: auto;
    max-width: 560px;
    border-left: none;
    padding-left: 0;
    gap: 22px;
  }
  .seq-letter { font-size: 1.75rem; }
  .hero-desc { border-top: none; padding-top: 0; margin-top: 0; }
  .hero-desc { grid-column: 1; }
}

/* ---------- numbered index strip ---------- */
.index-strip {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  border-bottom: 1px solid var(--ink);
  background: var(--paper);
}
.index-strip a {
  padding: 18px 16px 20px;
  border-right: 1px solid var(--line);
  transition: background-color 160ms ease;
}
.index-strip a:last-child { border-right: none; }
.index-strip a:hover { background: #f1efe9; }
.index-strip .num {
  display: block;
  font-family: var(--sans-display);
  font-weight: 700;
  font-size: 1.375rem;
  margin-bottom: 10px;
}
.index-strip .t {
  display: block;
  font-weight: 700;
  font-size: 0.8125rem;
  margin-bottom: 4px;
}
.index-strip .d {
  display: block;
  font-size: 0.75rem;
  color: var(--ink-soft);
  line-height: 1.5;
}
@media (max-width: 1023px) {
  .index-strip { grid-template-columns: repeat(3, 1fr); }
  .index-strip a:nth-child(3) { border-right: none; }
  .index-strip a:nth-child(-n+3) { border-bottom: 1px solid var(--line); }
}
@media (max-width: 560px) {
  .index-strip { grid-template-columns: repeat(2, 1fr); }
  .index-strip .d { display: none; }
  .index-strip a { padding: 14px 14px 16px; }
  .index-strip a:nth-child(3) { border-right: 1px solid var(--line); }
  .index-strip a:nth-child(even) { border-right: none; }
  .index-strip a:nth-child(-n+4) { border-bottom: 1px solid var(--line); }
}

/* ---------- sections ---------- */
.band {
  border-bottom: 1px solid var(--ink);
  padding: clamp(56px, 9vh, 110px) var(--gutter);
}
.band-inner { max-width: 1280px; margin: 0 auto; }

.kicker {
  font-family: var(--mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 14px;
}
.band h2 {
  font-family: var(--sans-display);
  font-weight: 800;
  font-size: 2.25rem;
  line-height: 1.05;
  margin: 0 0 24px;
  text-wrap: balance;
}
@media (max-width: 640px) { .band h2 { font-size: 1.75rem; } }
.band p { max-width: var(--measure); }
.band p.lede { font-size: 1.1875rem; font-weight: 500; }

.two-col {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 56px;
  align-items: center;
}
@media (max-width: 900px) { .two-col { grid-template-columns: 1fr; gap: 32px; } }

.figure-cut { position: relative; }
.figure-cut img { width: 100%; max-width: 460px; margin: 0 auto; }
.figure-cut figcaption {
  font-family: var(--mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  color: var(--ink-soft);
  text-align: center;
  margin-top: 10px;
}

/* state table */
.state-table-wrap { position: relative; margin-top: 56px; }
table.state {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}
table.state th {
  font-family: var(--mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  text-align: left;
  color: var(--ink-soft);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  padding: 10px 14px;
}
table.state td {
  border-bottom: 1px solid var(--line);
  padding: 14px;
  vertical-align: top;
}
table.state td.ph {
  font-family: var(--sans-display);
  font-weight: 800;
  font-size: 1.5rem;
  line-height: 1;
  width: 56px;
}
table.state td.nm {
  font-family: var(--mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  white-space: nowrap;
  padding-top: 18px;
}
table.state tr.done td.ph, table.state tr.done td.nm { color: var(--accent); }
.stamp {
  position: absolute;
  right: -8px;
  top: -74px;
  width: 190px;
  transform: rotate(8deg);
  pointer-events: none;
}
@media (max-width: 900px) {
  .stamp { width: 130px; top: -58px; }
  table.state { font-size: 0.875rem; }
  table.state .hide-m { display: none; }
}

/* divider band (print detail photo) */
.divider-print {
  border-bottom: 1px solid var(--ink);
  height: clamp(220px, 42vh, 460px);
  background-image: url("print_detail.png");
  background-size: cover;
  background-position: center;
}

/* docs index rows */
.doc-rows { border-top: 1px solid var(--ink); }
.doc-row {
  display: grid;
  grid-template-columns: 90px minmax(0, 4fr) minmax(0, 6fr) 60px;
  gap: 24px;
  align-items: baseline;
  padding: 26px 8px;
  border-bottom: 1px solid var(--line);
  transition: background-color 160ms ease;
}
.doc-row:hover { background: #f1efe9; }
.doc-row .num {
  font-family: var(--sans-display);
  font-weight: 700;
  font-size: 1.5rem;
  line-height: 1;
}
.doc-row .title {
  font-weight: 800;
  font-size: 1.1875rem;
}
.doc-row .desc {
  font-size: 0.9375rem;
  color: var(--ink-soft);
  line-height: 1.6;
}
.doc-row .arrow {
  font-family: var(--sans-display);
  font-weight: 700;
  font-size: 1.25rem;
  text-align: right;
}
.doc-row:hover .arrow { color: var(--accent); }
@media (max-width: 760px) {
  .doc-row { grid-template-columns: 56px 1fr 32px; }
  .doc-row .desc { grid-column: 2; grid-row: 2; }
  .doc-row .arrow { grid-column: 3; grid-row: 1; }
}

/* references */
.ref-list { list-style: none; margin: 32px 0 0; padding: 0; border-top: 1px solid var(--ink); }
.ref-list li {
  display: grid;
  grid-template-columns: 44px minmax(0, 5fr) minmax(0, 6fr) 150px;
  gap: 18px;
  padding: 14px 6px;
  border-bottom: 1px solid var(--line);
  font-size: 0.875rem;
  align-items: baseline;
}
.ref-list .no { font-family: var(--mono); font-size: 0.75rem; color: var(--ink-soft); }
.ref-list .pt { font-weight: 700; }
.ref-list .pc { color: var(--ink-soft); line-height: 1.55; }
.ref-list .pid {
  font-family: var(--mono);
  font-size: 0.75rem;
  text-align: right;
  white-space: nowrap;
}
.ref-list .pid a { border-bottom: 1px solid var(--line-dark); padding-bottom: 1px; }
.ref-list .pid a:hover { color: var(--accent); border-color: var(--accent); }
@media (max-width: 860px) {
  .ref-list li { grid-template-columns: 32px 1fr; }
  .ref-list .pc { grid-column: 2; }
  .ref-list .pid { grid-column: 2; text-align: left; }
}

/* footer */
.site-footer {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 32px;
  align-items: center;
  padding: 40px var(--gutter);
}
.site-footer img { width: 92px; }
.site-footer .fmeta {
  font-family: var(--mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  color: var(--ink-soft);
  line-height: 1.9;
}
.site-footer .top-link {
  font-family: var(--mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  border-bottom: 1px solid var(--line-dark);
}
.site-footer .top-link:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- doc pages ---------- */
.page-head {
  border-bottom: 1px solid var(--ink);
  padding: clamp(48px, 8vh, 90px) var(--gutter) 36px;
}
.page-head .band-inner { max-width: 1280px; }
.page-head .num {
  font-family: var(--sans-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--accent);
  margin: 0 0 10px;
}
.page-head h1 {
  font-family: var(--sans-display);
  font-weight: 800;
  font-size: 3.25rem;
  line-height: 1.02;
  margin: 0 0 18px;
  text-wrap: balance;
}
@media (max-width: 640px) { .page-head h1 { font-size: 2.125rem; } }
.page-head .abstract {
  max-width: var(--measure);
  font-size: 1.125rem;
  font-weight: 500;
  margin: 0;
}
.page-body { padding: clamp(48px, 8vh, 90px) var(--gutter); }
.page-body .band-inner { max-width: 900px; margin: 0; }
.page-body h2 {
  font-family: var(--sans-display);
  font-weight: 800;
  font-size: 1.625rem;
  margin: 48px 0 16px;
}
.page-body h2:first-child { margin-top: 0; }
.page-body .sec-no {
  font-family: var(--mono);
  font-size: 0.6875rem;
  color: var(--accent);
  display: block;
  margin-bottom: 6px;
}

/* evidence anchors: mono footnote line under a claim paragraph */
.refnote {
  font-family: var(--mono);
  font-size: 0.6875rem;
  color: var(--ink-soft);
  max-width: var(--measure);
  margin: -8px 0 24px;
  padding-left: 14px;
  border-left: 2px solid var(--line-dark);
  word-break: break-all;
  line-height: 1.8;
}
.refnote a { border-bottom: 1px solid var(--line-dark); }
.refnote a:hover { color: var(--accent); border-color: var(--accent); }

/* verbatim quote block (incident reports, rule text) */
.evidence {
  max-width: var(--measure);
  margin: 28px 0;
  padding: 20px 24px;
  border-left: 3px solid var(--accent);
  background: #f4f2ec;
  font-size: 0.9375rem;
  line-height: 1.7;
}
.evidence .src {
  display: block;
  font-family: var(--mono);
  font-size: 0.6875rem;
  color: var(--ink-soft);
  margin-top: 10px;
  word-break: break-all;
}

/* generic rule/data table for doc pages */
table.rules {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  margin: 28px 0;
}
table.rules th {
  font-family: var(--mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  text-align: left;
  color: var(--ink-soft);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  padding: 10px 12px;
}
table.rules td {
  border-bottom: 1px solid var(--line);
  padding: 12px;
  vertical-align: top;
  line-height: 1.6;
}
table.rules td.key {
  font-family: var(--mono);
  font-size: 0.75rem;
  white-space: nowrap;
  font-weight: 400;
}
table.rules .flag {
  font-family: var(--mono);
  font-size: 0.625rem;
  color: var(--accent);
  text-transform: uppercase;
}
@media (max-width: 700px) {
  table.rules { font-size: 0.8125rem; }
  table.rules td.key { white-space: normal; }
  table.rules .hide-m { display: none; }
}
.page-nav {
  border-top: 1px solid var(--ink);
  display: flex;
  justify-content: space-between;
  padding: 24px var(--gutter);
  font-family: var(--mono);
  font-size: 0.75rem;
  text-transform: uppercase;
}
.page-nav a:hover { color: var(--accent); }

/* ---------- scroll reveal (single reveal pattern, MOTION 3) ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 600ms ease, transform 600ms ease;
}
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}