@import url("../fonts/fonts.css");

/* ============================================================
   Liqian (Eric) Yan — design system
   Editorial broadsheet: deep green on warm paper.
   Tokens are the single source of truth; nothing below hardcodes
   a colour that exists here.
   ============================================================ */

:root {
  --paper: #faf8f2;
  --paper-tint: #fbf9f3;
  --card: #fffefa;
  --ink: #1c1a16;
  /* Three levels of quiet, all of which still clear 4.5:1 against the paper.
     The obvious values (.45/.55) look right and measure 2.9:1 and 3.8:1 —
     unreadable for anyone who needs the contrast, so they are set by ratio
     rather than by eye. */
  --ink-70: rgba(28, 26, 22, 0.78);
  --ink-55: rgba(28, 26, 22, 0.7);
  --ink-45: rgba(28, 26, 22, 0.62);
  --green: #1e5b3e;
  --green-lift: #3e7a5c;
  --deep: #14402c;
  --mint: #8fbfa4;
  --cream: #f3efe4;

  --rule: rgba(28, 26, 22, 0.12);
  --rule-soft: rgba(28, 26, 22, 0.08);
  --rule-strong: rgba(28, 26, 22, 0.35);
  --rule-green: rgba(30, 91, 62, 0.22);
  --wash: rgba(30, 91, 62, 0.05);

  /* The Ideographic Description Characters (U+2FF0–U+2FFB) that appear in the
     IDS notation are absent from all three webfonts, so every stack ends with
     the symbol fonts that do carry them before falling back to a generic. */
  --symbols: "Apple Symbols", "Segoe UI Symbol", "Noto Sans Symbols 2",
    "Songti SC", "Noto Serif SC";
  --serif: "Newsreader", Georgia, var(--symbols), serif;
  --text: "EB Garamond", Georgia, var(--symbols), serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo,
    var(--symbols), monospace;
  --cjk: "Songti SC", "Noto Serif SC", "Source Han Serif SC",
    var(--symbols), serif;

  --measure: 620px;
  --shell: 1100px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- reset & base ---------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Paper grain. Sits above content, below the cursor ring. */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 95;
  opacity: 0.045;
  background-image: url("../grain.svg");
}

a {
  color: var(--green);
  text-decoration: none;
}

a:hover {
  color: var(--green-lift);
}

::selection {
  background: rgba(30, 91, 62, 0.18);
}

img {
  max-width: 100%;
}

h1,
h2,
h3,
h4 {
  font-weight: 400;
  margin: 0;
}

p {
  margin: 0;
}

:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 300;
  background: var(--deep);
  color: var(--cream);
  padding: 12px 20px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.skip:focus {
  left: 0;
}

/* ---------- keyframes ---------- */

@keyframes gpL {
  0% { opacity: 0; transform: translateX(-0.5em); }
  3.5% { opacity: 1; transform: translateX(-0.3em); }
  12% { opacity: 1; transform: translateX(-0.03em); }
  16.5% { opacity: 0; transform: translateX(-0.03em); }
  100% { opacity: 0; transform: translateX(-0.5em); }
}

@keyframes gpR {
  0% { opacity: 0; transform: translateX(0.5em); }
  3.5% { opacity: 1; transform: translateX(0.3em); }
  12% { opacity: 1; transform: translateX(0.03em); }
  16.5% { opacity: 0; transform: translateX(0.03em); }
  100% { opacity: 0; transform: translateX(0.5em); }
}

@keyframes gpT {
  0% { opacity: 0; transform: translateY(-0.42em); }
  3.5% { opacity: 1; transform: translateY(-0.26em); }
  12% { opacity: 1; transform: translateY(-0.02em); }
  16.5% { opacity: 0; transform: translateY(-0.02em); }
  100% { opacity: 0; transform: translateY(-0.42em); }
}

@keyframes gpB {
  0% { opacity: 0; transform: translateY(0.42em); }
  3.5% { opacity: 1; transform: translateY(0.26em); }
  12% { opacity: 1; transform: translateY(0.02em); }
  16.5% { opacity: 0; transform: translateY(0.02em); }
  100% { opacity: 0; transform: translateY(0.42em); }
}

@keyframes gpF {
  0%, 12% { opacity: 0; transform: scale(0.94); }
  17%, 27% { opacity: 1; transform: scale(1); }
  32%, 100% { opacity: 0; transform: scale(1); }
}

@keyframes gpC {
  0%, 13% { opacity: 0; }
  18%, 28% { opacity: 1; }
  33%, 100% { opacity: 0; }
}

@keyframes parY {
  from { transform: translateY(46px); }
  to { transform: translateY(-46px); }
}

@keyframes prog {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

@keyframes float {
  from { transform: translateY(2px); }
  to { transform: translateY(-5px); }
}

/* ---------- scroll progress ---------- */

.progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--green);
  transform-origin: left;
  transform: scaleX(0);
  z-index: 100;
  animation: prog linear both;
  animation-timeline: scroll();
}

/* ---------- masthead / tabs ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 248, 242, 0.86);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rule);
}

.nav-inner {
  max-width: var(--shell);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 14px 32px;
}

.nav-brand {
  font-family: var(--text);
  font-size: 15px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink);
  white-space: nowrap;
}

.nav-brand:hover {
  color: var(--green);
}

.tabs {
  display: flex;
  align-items: center;
  gap: 22px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.tab {
  color: var(--ink-55);
  padding-bottom: 3px;
  background-image: linear-gradient(var(--green), var(--green));
  background-repeat: no-repeat;
  background-position: left bottom;
  background-size: 0% 1px;
  transition: color 0.3s, background-size 0.35s var(--ease);
  white-space: nowrap;
}

.tab:hover {
  color: var(--green);
  background-size: 100% 1px;
}

.tab .zh {
  color: var(--green);
  font-family: var(--cjk);
}

/* The current tab is marked, not merely hovered — the reader always
   knows which of the six doors they are standing in. */
.tab[aria-current="page"] {
  color: var(--green);
  background-size: 100% 1px;
}

.tab--cta {
  color: var(--green);
  border-bottom: 1px solid var(--green);
  padding-bottom: 2px;
  background-image: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--rule-green);
  color: var(--green);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  padding: 0 16px;
  min-height: 44px;
  min-width: 60px;
  cursor: pointer;
}

/* ---------- layout ---------- */

.wrap {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 32px;
}

.section {
  position: relative;
  border-bottom: 1px solid var(--rule);
  overflow: hidden;
}

.section--tint {
  background: var(--paper-tint);
}

/* Faint ruled paper, as on a manuscript pad. */
.section--ruled {
  background-image: repeating-linear-gradient(
    transparent 0 31px,
    rgba(30, 91, 62, 0.06) 31px 32px
  );
}

.section-body {
  padding: 76px 0 72px;
  position: relative;
}

.watermark {
  position: absolute;
  font-family: var(--cjk);
  font-size: 400px;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(30, 91, 62, 0.12);
  pointer-events: none;
  user-select: none;
}

.watermark--right { right: -40px; top: 60px; }
.watermark--left { left: -50px; top: 70px; }

/* Sidebar of plate numbers, running down the left margin. */
.gutter-grid {
  display: grid;
  grid-template-columns: 120px 1fr;
  position: relative;
}

.gutter {
  border-right: 1px solid var(--rule-green);
  padding: 80px 16px 60px 0;
  display: flex;
  flex-direction: column;
  gap: 120px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--green);
}

.gutter span {
  color: var(--ink-45);
}

.gutter-main {
  padding: 76px 0 72px 44px;
  min-width: 0;
}

/* ---------- type ---------- */

.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--green);
}

.display {
  font-family: var(--serif);
  font-optical-sizing: auto;
  font-size: 54px;
  line-height: 1.12;
  text-wrap: pretty;
}

.h2 {
  font-family: var(--serif);
  font-size: 40px;
  line-height: 1.15;
  margin: 16px 0 0;
  max-width: 620px;
  text-wrap: pretty;
}

.h3 {
  font-family: var(--serif);
  font-size: 25px;
  line-height: 1.25;
}

em {
  color: var(--green);
}

.rule-line {
  height: 1px;
  background: var(--green);
  width: 72px;
  margin: 26px 0;
}

.lede {
  font-family: var(--text);
  font-size: 18px;
  line-height: 1.55;
  color: var(--ink-70);
  max-width: 520px;
}

.prose {
  font-family: var(--text);
  font-size: 17.5px;
  line-height: 1.9;
  color: rgba(28, 26, 22, 0.75);
  max-width: var(--measure);
}

.prose + .prose {
  margin-top: 20px;
}

.note {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--ink-45);
  line-height: 1.7;
}

.mono-label {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--green);
}

/* ---------- links ---------- */

.link {
  color: var(--green);
  border-bottom: 1px solid var(--green);
  padding-bottom: 3px;
  font-family: var(--mono);
  font-size: 12px;
  transition: color 0.25s, border-color 0.25s;
}

.link:hover {
  color: var(--green-lift);
  border-color: var(--green-lift);
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: baseline;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  padding: 12px 20px;
  border: 1px solid var(--green);
  color: var(--green);
  background: transparent;
  transition: background 0.28s var(--ease), color 0.28s var(--ease);
}

.btn:hover {
  background: var(--green);
  color: var(--paper);
}

.btn--solid {
  background: var(--green);
  color: var(--paper);
}

.btn--solid:hover {
  background: var(--deep);
  border-color: var(--deep);
  color: var(--paper);
}

/* ---------- stat band ---------- */

.stat-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.stat {
  padding: 22px 24px;
  border-right: 1px solid var(--rule);
}

.stat:last-child {
  border-right: 0;
}

.stat-figure {
  font-family: var(--mono);
  font-size: 24px;
  color: var(--green);
}

.stat-label {
  font-family: var(--text);
  font-size: 14.5px;
  color: var(--ink-45);
  margin-top: 5px;
}

/* ---------- cards ---------- */

.card {
  border: 1px solid rgba(28, 26, 22, 0.14);
  background: var(--card);
}

.card--pad {
  padding: 30px 32px;
}

.card--lift {
  transition: transform 0.35s var(--ease), box-shadow 0.35s;
}

.card--lift:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 34px rgba(28, 26, 22, 0.08);
}

.card-kicker {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--green);
}

.card-title {
  font-family: var(--serif);
  font-size: 28px;
  margin-top: 12px;
}

.card-copy {
  font-family: var(--text);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-70);
  margin-top: 10px;
}

/* ---------- ledger rows ---------- */

.ledger {
  border-top: 1px solid var(--rule-strong);
}

.ledger-row {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 20px;
  padding: 24px 6px;
  border-bottom: 1px solid rgba(28, 26, 22, 0.14);
  transition: background 0.35s, padding-left 0.35s var(--ease);
  color: inherit;
}

a.ledger-row:hover,
.ledger-row:hover {
  background: var(--wash);
  padding-left: 16px;
  color: inherit;
}

.ledger-id {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--green);
  padding-top: 6px;
}

.ledger-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
}

.ledger-title {
  font-family: var(--serif);
  font-size: 25px;
}

.ledger-meta {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-45);
}

.ledger-copy {
  font-family: var(--text);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-70);
  margin: 8px 0 0;
  max-width: 640px;
}

/* ---------- chips ---------- */

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.chip {
  border: 1px solid var(--rule-green);
  color: var(--green);
  padding: 3px 9px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.06em;
}

.chip--lg {
  padding: 8px 16px;
  font-size: 11px;
  letter-spacing: 0.08em;
  transition: background 0.25s, color 0.25s;
}

.chip--lg:hover {
  background: var(--green);
  color: var(--paper);
}

/* ---------- figures ---------- */

.figure {
  border: 1px solid rgba(28, 26, 22, 0.14);
  background: var(--card);
  padding: 24px 24px 0;
  margin: 36px 0 0;
  max-width: 760px;
}

.figure svg {
  display: block;
  width: 100%;
  height: auto;
}

.figure img {
  display: block;
  width: 100%;
}

.figcap {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--green);
  border-top: 1px solid rgba(28, 26, 22, 0.1);
  margin-top: 20px;
  padding: 12px 0;
  line-height: 1.7;
}

.figcap b {
  font-weight: 500;
}

.figcap span {
  color: var(--ink-45);
  letter-spacing: 0.04em;
  text-transform: none;
}

/* Photo placeholders — replaced with real <img> when photos arrive. */
.plate {
  width: 100%;
  height: 100%;
  min-height: inherit;
  display: flex;
  align-items: center;
  justify-content: center;
  background: repeating-linear-gradient(
    135deg,
    var(--card) 0 10px,
    #f5f2e8 10px 20px
  );
  border: 1px solid rgba(28, 26, 22, 0.14);
}

.plate span {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--ink-45);
  text-transform: uppercase;
}

.plate-cap {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--ink-45);
}

/* ---------- data tables ---------- */

/* The fade is the only cue that a table continues past the right edge:
   touch scrollbars are invisible at rest, and these tables hide ~55% of
   their width at 390px. */
.table-scroll {
  overflow-x: auto;
  margin: 28px 0 0;
  -webkit-overflow-scrolling: touch;
  mask-image: linear-gradient(to right, #000 calc(100% - 42px), transparent);
  -webkit-mask-image: linear-gradient(to right, #000 calc(100% - 42px), transparent);
}

/* No clipping, no fade. */
@supports (animation-timeline: scroll(self inline)) {
  .table-scroll {
    animation: unfade linear both;
    animation-timeline: scroll(self inline);
    animation-range: contain;
  }
}

@keyframes unfade {
  to {
    mask-image: linear-gradient(to right, #000 100%, #000);
    -webkit-mask-image: linear-gradient(to right, #000 100%, #000);
  }
}

.tbl {
  border-collapse: collapse;
  width: 100%;
  min-width: 520px;
  font-family: var(--mono);
  font-size: 12px;
}

.tbl caption {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--green);
  text-align: left;
  padding-bottom: 10px;
}

.tbl th,
.tbl td {
  border-bottom: 1px solid var(--rule);
  padding: 9px 14px 9px 0;
  text-align: right;
  white-space: nowrap;
}

.tbl th:first-child,
.tbl td:first-child {
  text-align: left;
  font-family: var(--text);
  font-size: 15px;
  white-space: normal;
}

.tbl thead th {
  border-bottom: 1px solid var(--rule-strong);
  color: var(--ink-45);
  font-weight: 400;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.tbl tbody tr:hover {
  background: var(--wash);
}

.tbl .is-ours {
  color: var(--green);
}

.tbl .is-ours td {
  font-weight: 500;
  border-bottom: 1px solid var(--rule-green);
}

.tbl .group td {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--ink-45);
  text-transform: uppercase;
  padding-top: 18px;
  border-bottom: 0;
}

/* ---------- callout ---------- */

.callout {
  border-left: 2px solid var(--green);
  background: var(--wash);
  padding: 20px 24px;
  margin-top: 32px;
  max-width: var(--measure);
  font-family: var(--text);
  font-size: 16.5px;
  line-height: 1.8;
  color: rgba(28, 26, 22, 0.78);
}

.callout .mono-label {
  display: block;
  margin-bottom: 8px;
}

/* ---------- contact band (shared footer) ---------- */

.contact {
  background: var(--deep);
  color: var(--cream);
  scroll-margin-top: 70px;
}

.contact .eyebrow {
  color: var(--mint);
}

.contact-head {
  font-family: var(--serif);
  font-size: 46px;
  line-height: 1.1;
  font-weight: 300;
  margin: 18px 0 0;
  max-width: 720px;
  text-wrap: pretty;
}

.contact-head em {
  color: var(--mint);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.contact-card {
  border: 1px solid rgba(243, 239, 228, 0.2);
  padding: 24px 26px;
  color: var(--cream);
  display: block;
  transition: transform 0.3s var(--ease), border-color 0.3s;
}

.contact-card:hover {
  transform: translateY(-4px);
  border-color: var(--mint);
  color: var(--cream);
}

.contact-card-label {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--mint);
}

.contact-card-value {
  font-family: var(--serif);
  font-size: 20px;
  margin-top: 10px;
  word-break: break-word;
}

.colophon {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 64px;
  border-top: 1px solid rgba(243, 239, 228, 0.16);
  padding-top: 22px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: rgba(243, 239, 228, 0.72);
}

/* ---------- page hero (interior pages) ---------- */

.page-hero {
  border-bottom: 1px solid var(--rule);
  position: relative;
  overflow: hidden;
}

.page-hero-body {
  padding: 64px 0 52px;
  position: relative;
}

.crumb {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--ink-45);
  margin-bottom: 22px;
}

.crumb a {
  color: var(--ink-45);
}

.crumb a:hover {
  color: var(--green);
}

/* ---------- door grid (home) ---------- */

.doors {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--rule);
}

.door {
  display: block;
  padding: 34px 34px 30px;
  border-bottom: 1px solid var(--rule);
  border-right: 1px solid var(--rule);
  color: inherit;
  transition: background 0.35s;
}

.door:nth-child(2n) {
  border-right: 0;
}

.door:hover {
  background: var(--wash);
  color: inherit;
}

.door-mark {
  font-family: var(--cjk);
  font-size: 40px;
  line-height: 1;
  color: var(--green);
}

.door-title {
  font-family: var(--serif);
  font-size: 26px;
  margin-top: 14px;
}

.door-copy {
  font-family: var(--text);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-70);
  margin-top: 8px;
  max-width: 420px;
}

.door-more {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--green);
  margin-top: 18px;
  display: block;
}

/* ---------- paper (web edition) ---------- */

.paper-shell {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}

.paper-toc {
  position: sticky;
  top: 86px;
  min-width: 0;
  padding: 48px 0 60px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  line-height: 1.9;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
}

.paper-toc a {
  display: block;
  color: var(--ink-55);
  padding: 2px 0;
  border-left: 1px solid transparent;
  padding-left: 12px;
  margin-left: -12px;
  transition: color 0.25s, border-color 0.25s;
}

.paper-toc a:hover,
.paper-toc a.is-active {
  color: var(--green);
  border-left-color: var(--green);
}

.paper-toc .toc-head {
  color: var(--ink-45);
  letter-spacing: 0.14em;
  padding-bottom: 10px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--rule);
}

.paper {
  padding: 48px 0 80px;
  max-width: 700px;
  min-width: 0;
}

.paper h2 {
  font-family: var(--serif);
  font-size: 27px;
  line-height: 1.25;
  margin: 56px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
  scroll-margin-top: 84px;
}

.paper h3 {
  font-family: var(--serif);
  font-size: 20px;
  margin: 34px 0 0;
  scroll-margin-top: 84px;
}

/* Run-in labels inside a paper. Deliberately not headings: they sit below
   the numbered <h3> subsections, so marking them up as <h4> would skip a
   level wherever a section has no numbered subsection. */
.paper .runin {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--green);
  margin: 28px 0 0;
  text-transform: uppercase;
}

.paper p {
  font-family: var(--text);
  font-size: 17.5px;
  line-height: 1.85;
  color: rgba(28, 26, 22, 0.82);
  margin-top: 16px;
}

.paper ul,
.paper ol {
  font-family: var(--text);
  font-size: 17.5px;
  line-height: 1.85;
  color: rgba(28, 26, 22, 0.82);
  margin: 16px 0 0;
  padding-left: 22px;
}

.paper li {
  margin-top: 8px;
}

.paper li::marker {
  color: var(--green);
}

.paper .sec-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--green);
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 6px;
}

.paper code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--wash);
  padding: 1px 5px;
  color: var(--deep);
}

.paper-meta {
  border-top: 1px solid var(--rule-strong);
  border-bottom: 1px solid var(--rule);
  padding: 22px 0;
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 22px;
}

.paper-meta dt {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--ink-45);
  text-transform: uppercase;
}

.paper-meta dd {
  font-family: var(--text);
  font-size: 16px;
  line-height: 1.6;
  margin: 6px 0 0;
  color: var(--ink);
}

.abstract {
  border: 1px solid rgba(28, 26, 22, 0.14);
  background: var(--card);
  padding: 28px 30px;
  margin-top: 32px;
}

.abstract p {
  margin-top: 12px;
  font-size: 17px;
}

.abstract p:first-of-type {
  margin-top: 0;
}

/* Display equations. Hand-set — the PDF remains authoritative. */
.eq {
  font-family: var(--mono);
  font-size: 14.5px;
  line-height: 2;
  color: var(--deep);
  background: var(--wash);
  border-left: 2px solid var(--rule-green);
  padding: 16px 20px;
  margin-top: 22px;
  overflow-x: auto;
  white-space: nowrap;
}

.eq .num {
  float: right;
  color: var(--ink-45);
  padding-left: 24px;
}

.paper .var {
  font-family: var(--text);
  font-style: italic;
  font-size: 1.05em;
}

.paper .fn {
  font-family: var(--text);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-55);
  border-top: 1px solid var(--rule);
  margin-top: 40px;
  padding-top: 16px;
}

.refs {
  font-family: var(--text);
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--ink-70);
  columns: 1;
  margin-top: 20px;
}

.refs li {
  margin-top: 12px;
  padding-left: 0;
}

/* Italic journal titles must stay ink, not pick up the accent that `em`
   carries in running prose. */
.refs i,
.refs em,
.tbl em,
.paper-meta em {
  color: inherit;
  font-style: italic;
}

.paper .refs {
  padding-left: 20px;
}

/* Banner distinguishing the web edition from the manuscript of record. */
.edition {
  border: 1px solid var(--rule-green);
  background: var(--wash);
  padding: 16px 20px;
  margin-top: 28px;
  font-family: var(--text);
  font-size: 15.5px;
  line-height: 1.7;
  color: rgba(28, 26, 22, 0.78);
  display: flex;
  gap: 14px;
  align-items: baseline;
  flex-wrap: wrap;
}

.edition .mono-label {
  white-space: nowrap;
}

/* ---------- misc ---------- */

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

/* Text column beside a plate or sidebar. */
.split {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 56px;
  align-items: start;
}

.grid-hero {
  display: grid;
  grid-template-columns: 1fr 330px;
  gap: 56px;
  padding: 80px 0 68px;
  align-items: center;
}

.glyph-plate {
  border: 1px solid rgba(28, 26, 22, 0.14);
  background: var(--card);
  padding: 30px 20px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  box-shadow: 0 1px 0 rgba(28, 26, 22, 0.04);
}

.glyph-stage {
  position: relative;
  height: 180px;
  width: 100%;
  font-family: var(--cjk);
  animation: float 7s ease-in-out infinite alternate;
}

.glyph-frame {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.glyph-parts {
  display: flex;
  align-items: center;
  justify-content: center;
}

.glyph-parts.is-stacked {
  flex-direction: column;
  line-height: 0.95;
}

.glyph-parts span {
  font-size: 92px;
  display: inline-block;
}

.is-stacked span {
  font-size: 64px;
}

.glyph-a { color: var(--green); }
.glyph-b { color: var(--ink); }

.glyph-final {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 122px;
  color: var(--green);
  opacity: 0;
}

.glyph-caps {
  position: relative;
  height: 30px;
  width: 100%;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--green);
}

.glyph-caps span {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  opacity: 0;
}

.plate-foot {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--ink-45);
  text-align: center;
  line-height: 1.7;
  border-top: 1px solid rgba(28, 26, 22, 0.1);
  padding-top: 12px;
  width: 100%;
}

.spec {
  border-top: 1px solid var(--rule-strong);
}

.spec-row {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 20px;
  padding: 16px 6px;
  border-bottom: 1px solid rgba(28, 26, 22, 0.14);
}

.spec-key {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--green);
  padding-top: 4px;
}

.spec-val {
  font-family: var(--text);
  font-size: 16.5px;
  line-height: 1.7;
  color: rgba(28, 26, 22, 0.75);
}

.next {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--rule);
}

.next a {
  padding: 26px 32px;
  border-right: 1px solid var(--rule);
  color: inherit;
  transition: background 0.3s;
}

.next a:last-child {
  border-right: 0;
  text-align: right;
}

.next a:hover {
  background: var(--wash);
  color: inherit;
}

.next-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--ink-45);
}

.next-title {
  font-family: var(--serif);
  font-size: 22px;
  margin-top: 8px;
}

/* ---------- responsive ---------- */

@media (max-width: 1000px) {
  /* minmax(0,…) rather than 1fr: a bare 1fr takes its min size from content,
     and one nowrap equation is enough to push the whole page sideways. */
  .paper-shell {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }

  .paper-toc {
    position: static;
    max-height: none;
    padding: 32px 0 0;
    columns: 2;
    column-gap: 32px;
  }

  /* minmax(0,…) for the same reason as .paper-shell above: site.js sets
     white-space:nowrap on the eyebrow, and a bare 1fr takes its minimum from
     that, pushing the hero past a 320px viewport where overflow-x:hidden
     clips it beyond reach. */
  .grid-hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 40px;
    padding: 56px 0 52px;
  }

  .contact-head {
    font-size: 36px;
  }
}

@media (max-width: 820px) {
  .nav-inner {
    flex-wrap: wrap;
    padding: 12px 22px;
  }

  .nav-toggle {
    display: block;
  }

  .tabs {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    border-top: 1px solid var(--rule);
    margin-top: 12px;
    padding-top: 4px;
  }

  .tabs.is-open {
    display: flex;
  }

  .tabs .tab {
    width: 100%;
    padding: 12px 0;
    border-bottom: 1px solid var(--rule-soft);
    background-image: none;
  }

  .tab--cta {
    border-bottom: 1px solid var(--rule-soft);
  }

  .wrap {
    padding: 0 22px;
  }

  .gutter-grid {
    grid-template-columns: 1fr;
  }

  .gutter {
    flex-direction: row;
    gap: 28px;
    flex-wrap: wrap;
    border-right: 0;
    border-bottom: 1px solid var(--rule-green);
    padding: 40px 0 16px;
  }

  .gutter-main {
    padding: 32px 0 56px;
  }

  .display {
    font-size: 34px;
    line-height: 1.15;
  }

  .h2 {
    font-size: 27px;
  }

  .contact-head {
    font-size: 30px;
  }

  .stat-band {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat:nth-child(2n) {
    border-right: 0;
  }

  .stat:nth-child(-n + 2) {
    border-bottom: 1px solid var(--rule);
  }

  .contact-grid,
  .grid-2,
  .doors,
  .next,
  .split {
    grid-template-columns: 1fr;
  }

  .split {
    gap: 36px;
  }

  .door,
  .next a {
    border-right: 0;
  }

  .next a:last-child {
    text-align: left;
  }

  .watermark {
    font-size: 240px;
  }

  .section-body {
    padding: 52px 0 56px;
  }

  .ledger-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .ledger-id {
    padding-top: 0;
  }

  .spec-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .paper-toc {
    columns: 1;
  }

  .paper h2 {
    font-size: 23px;
  }

  .paper p,
  .paper ul,
  .paper ol {
    font-size: 16.5px;
  }
}

/* The IDS table and the equations carry content that cannot reflow; below the
   narrowest common phone they scroll inside their own box rather than pushing
   the page sideways, where overflow-x:hidden would clip them out of reach. */
@media (max-width: 400px) {
  .card > div[style*="grid-template-columns:80px"] {
    grid-template-columns: 54px 1fr 84px !important;
    padding-left: 12px !important;
    padding-right: 12px !important;
  }

  .paper .eq {
    font-size: 12.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

@media print {
  .nav,
  .progress,
  .contact,
  .paper-toc,
  .next {
    display: none !important;
  }

  body::after {
    display: none;
  }

  .paper-shell {
    grid-template-columns: 1fr;
  }

  body {
    background: #fff;
  }
}