/* About page only. Shared components live in site.css; colours only as var(--ep-*).
   The brand-asset stages pin each half to one palette (.ep-datasheet, .ep-carbon) so every
   file is previewed on the ground it was drawn for, whatever the page theme. */

/* ---------- hero: the claim, the standfirst beside the datasheet, the index ---------- */
.a-hero { padding-top: clamp(28px, 4.4vw, 64px); }
.a-hero-top {
  display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: var(--ep-space-2) var(--ep-space-5);
  padding-bottom: var(--ep-space-4); border-bottom: 1px solid var(--ep-rule-strong);
}
.a-hero-top .lbl { color: var(--ep-text); }
.a-line { display: block; }
.a-line + .a-line { color: var(--ep-text-2); }
.a-hero-body {
  display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--ep-col-gap); row-gap: var(--ep-space-6);
  align-items: start; padding-top: clamp(32px, 3.6vw, 56px);
}
.a-hero-text { grid-column: 1 / span 6; display: grid; gap: var(--ep-space-4); align-content: start; min-width: 0; }
.a-hero-text .lead { max-width: 50ch; }
.a-hero-text .muted { max-width: 54ch; }
.a-hero-spec { grid-column: 8 / -1; }

.a-toc {
  display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--ep-col-gap); row-gap: var(--ep-space-3);
  margin-top: clamp(48px, 5vw, 80px); border-top: 1px solid var(--ep-rule-strong); padding-top: var(--ep-space-4);
}
.a-toc > .lbl { grid-column: 1 / span 3; color: var(--ep-text); }
.a-toc-list { grid-column: 4 / -1; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); column-gap: var(--ep-col-gap); }
.a-toc-list a {
  display: flex; align-items: center; gap: 10px; min-height: 44px; padding-block: 8px;
  border-bottom: 1px solid var(--ep-rule); color: var(--ep-text-2); text-decoration: none; font-size: 15px; line-height: 1.3;
}
/* a plain 8 px rule, not a node glyph: the squares mean node states everywhere else */
.a-toc-list a::before { content: ""; width: 8px; height: 0; flex: none; border-top: 1.5px solid currentColor; }
.a-toc-list a:hover { color: var(--ep-text); border-bottom-color: var(--ep-text); }

/* phones: the index folds into one row, driven by pages/about.js; without it the button stays hidden */
.a-toc-btn {
  grid-column: 1 / -1; display: flex; align-items: center; gap: var(--ep-space-3); width: 100%; min-height: 44px;
  padding: 0; border: 0; background: none; color: var(--ep-text); font: inherit; text-align: left; cursor: pointer;
}
.a-toc-btn .lbl { color: var(--ep-text); }
.a-toc-count { color: var(--ep-text-3); }
.a-toc-ic { margin-left: auto; transform: rotate(90deg); transition: transform .15s; }
.a-toc.is-open .a-toc-ic { transform: rotate(-90deg); }
.a-toc.is-folding > .a-toc-lbl { display: none; }
.a-toc.is-folding:not(.is-open) .a-toc-list { display: none; }
.a-toc.is-folding .a-toc-list { border-top: 1px solid var(--ep-rule); }

@media (max-width: 900px) {
  .a-hero-text, .a-hero-spec { grid-column: 1 / -1; }
  .a-toc > .lbl, .a-toc-list { grid-column: 1 / -1; }
  .a-toc-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 620px) {
  .a-hero-spec { grid-template-columns: minmax(0, 1fr); }
  .a-hero-spec dd { border-top: 0; padding-top: 0; }
  .a-hero-spec dt { padding-bottom: 4px; }
  .a-toc-list { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- independence: three things of our own ---------- */
.a-own {
  display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); grid-template-rows: repeat(4, auto); column-gap: var(--ep-col-gap);
  border-top: 1px solid var(--ep-rule-strong);
}
/* a subgrid, so the eyebrows, titles, bodies and notes of the three cards share rows */
.a-own-item {
  grid-column: span 4; grid-row: span 4; position: relative;
  display: grid; grid-template-rows: subgrid; row-gap: var(--ep-space-3); align-content: start;
  padding-block: var(--ep-space-5); min-width: 0;
}
/* the divider sits in the middle of the gutter, so the text starts on grid columns 5 and 9 */
.a-own-item + .a-own-item::before {
  content: ""; position: absolute; top: 0; bottom: 0; left: calc(var(--ep-col-gap) / -2); border-left: 1px solid var(--ep-rule);
}
.a-own-no { display: flex; align-items: center; justify-content: space-between; gap: var(--ep-space-2); min-height: 24px; }
.a-own-ic { width: 20px; height: 20px; color: var(--ep-text-3); }
.a-own-item h3 { font-stretch: var(--ep-width-display); font-weight: 520; font-size: clamp(21px, 1.9vw, 26px); line-height: 1.1; letter-spacing: -.008em; }
.a-own-item p { font-size: 15.5px; line-height: 1.55; color: var(--ep-text-2); }
.a-own-item .mono { font-size: .84em; }
.a-own-item .a-own-note {
  align-self: start; margin-top: var(--ep-space-2); padding-top: var(--ep-space-3); border-top: 1px dashed var(--ep-rule-strong);
  font-size: 14.5px; color: var(--ep-text);
}
.a-ind-note { margin-top: var(--ep-space-6); max-width: 70ch; }
@media (max-width: 900px) {
  .a-own { grid-template-rows: none; }
  .a-own-item { grid-column: 1 / -1; grid-row: auto; grid-template-rows: none; }
  .a-own-item + .a-own-item { border-top: 1px solid var(--ep-rule); }
  .a-own-item + .a-own-item::before { content: none; }
}

/* ---------- who operates what: the register, in three groups ----------
   Rows are grids on the page's 12 columns, so "Operated by" starts on column 7 (with the section
   leads) and "Check it" on column 9 (with the brand-asset text). The explicit role attributes keep
   the table semantics while the cells are laid out as grid items. */
.a-reg, .a-reg thead, .a-reg tbody { display: block; width: 100%; }
.a-reg tr {
  display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--ep-col-gap);
  border-bottom: 1px solid var(--ep-rule);
}
.a-reg th, .a-reg td { display: block; text-align: left; padding: 16px 0; min-width: 0; }
.a-reg tr > :nth-child(1) { grid-column: 1 / span 6; }
.a-reg tr > :nth-child(2) { grid-column: 7 / span 2; }
.a-reg tr > :nth-child(3) { grid-column: 9 / -1; }
.a-reg thead tr { border-bottom-color: var(--ep-rule-strong); }
.a-reg thead th {
  padding-top: 0; padding-bottom: 12px; white-space: nowrap;
  font-family: var(--ep-font-sans); font-stretch: var(--ep-width-label); font-weight: 650; font-size: 11.5px; line-height: 1.3; letter-spacing: .14em; text-transform: uppercase; color: var(--ep-text-3);
}
.a-reg tr.a-reg-gh > th { grid-column: 1 / -1; padding: 36px 0 10px; color: var(--ep-text); }
.a-reg tbody:first-of-type tr.a-reg-gh > th { padding-top: 24px; }
.a-reg tbody th { font-weight: 400; }
.a-reg td { font-size: 15px; line-height: 1.5; }
.a-reg td a { overflow-wrap: anywhere; }
.a-reg td .mono { font-size: 12.5px; }
.a-reg-part { display: block; font-stretch: var(--ep-width-heading); font-weight: 600; font-size: 17px; line-height: 1.3; }
.a-reg-part .mono { font-size: 14px; font-weight: 500; }
.a-reg-sub { display: block; margin-top: 4px; font-size: 14.5px; line-height: 1.5; color: var(--ep-text-2); max-width: 58ch; }
.a-reg-sub .mono { font-size: 12.5px; }
.a-reg-k { display: none; }

@media (max-width: 1100px) {
  .a-reg tr > :nth-child(1) { grid-column: 1 / span 5; }
  .a-reg tr > :nth-child(2) { grid-column: 6 / span 3; }
}
@media (max-width: 760px) {
  .a-reg thead {
    position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; margin: -1px;
  }
  .a-reg tr { grid-template-columns: minmax(0, 1fr); row-gap: 6px; padding: 16px 0; }
  .a-reg tr > :nth-child(n) { grid-column: 1 / -1; }
  .a-reg th, .a-reg td { padding: 0; }
  .a-reg tr.a-reg-gh { padding: 32px 0 10px; }
  .a-reg tbody:first-of-type tr.a-reg-gh { padding-top: 12px; border-top: 1px solid var(--ep-rule-strong); }
  .a-reg tr.a-reg-gh > th, .a-reg tbody:first-of-type tr.a-reg-gh > th { padding: 0; }
  .a-reg tbody th { margin-bottom: 4px; }
  .a-reg td { display: grid; grid-template-columns: 7.4em minmax(0, 1fr); column-gap: var(--ep-space-2); align-items: baseline; }
  .a-reg-k {
    display: block;
    font-family: var(--ep-font-sans); font-stretch: var(--ep-width-label); font-weight: 650; font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--ep-text-3);
  }
  .a-reg td { font-size: 14.5px; }
}

/* ---------- disclosure statement, set apart ---------- */
.a-disc-band { background: var(--ep-panel); border-block: 1px solid var(--ep-rule); padding-block: clamp(56px, 7vw, 104px); }
.a-disc-grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--ep-col-gap); row-gap: var(--ep-space-5); }
.a-disc-rail { grid-column: 1 / span 3; display: grid; gap: var(--ep-space-3); align-content: start; padding-top: 8px; }
.a-disc-lbl { color: var(--ep-text); }
.a-disc-meta { display: grid; gap: 2px; }
.a-disc-rail .path a { color: var(--ep-text-2); text-decoration-color: var(--ep-link-line); }
.a-disc-rail .path a:hover { color: var(--ep-text); text-decoration-color: var(--ep-link-line-hover); }
.a-disc-body { grid-column: 4 / span 8; display: grid; gap: var(--ep-space-6); min-width: 0; }
.a-disc-text {
  max-width: none; font-stretch: var(--ep-width-text); font-weight: 400;
  font-size: clamp(19px, 1.8vw, 25px); line-height: 1.5; letter-spacing: -.004em; color: var(--ep-text);
}
.a-disc-text .mono { font-size: .86em; letter-spacing: 0; }
.a-disc-foot {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--ep-space-3) var(--ep-space-6);
  border-top: 1px solid var(--ep-rule-strong); padding-top: var(--ep-space-4);
}
@media (max-width: 900px) {
  .a-disc-rail, .a-disc-body { grid-column: 1 / -1; }
  .a-disc-rail { padding-top: 0; }
  .a-disc-body { gap: var(--ep-space-5); }
}

/* ---------- Pearl Research Labs and Pearl Swap ---------- */
.a-rel { align-items: stretch; grid-template-rows: repeat(5, auto); row-gap: 0; }
.a-rel-plate { grid-row: span 5; grid-template-rows: subgrid; row-gap: var(--ep-space-5); padding: clamp(20px, 2.6vw, 32px); }
.a-rel-plate .plate-head .path { color: var(--ep-text-2); text-decoration-color: var(--ep-link-line); }
.a-rel-plate .plate-head .path:hover { color: var(--ep-text); text-decoration-color: var(--ep-link-line-hover); }
.a-rel-title { font-stretch: var(--ep-width-display); font-weight: 520; font-size: clamp(22px, 2.2vw, 28px); line-height: 1.1; letter-spacing: -.01em; max-width: 22ch; }
.a-rel-plate > .muted { font-size: 15.5px; }
.a-rel-kv { align-self: start; }
.a-rel-kv dd .mono { font-size: 13px; }
.a-rel-plate .link-arrow { justify-self: start; align-self: end; }
@media (max-width: 620px) {
  .a-rel { grid-template-rows: none; row-gap: var(--ep-col-gap); }
  .a-rel-plate { grid-row: auto; grid-template-rows: none; }
}
.a-rel-note { margin-top: var(--ep-space-6); max-width: 70ch; }

/* ---------- contact and security reports ---------- */
.a-con { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--ep-col-gap); row-gap: var(--ep-space-8); align-items: start; }
.a-con-mail { grid-column: 1 / span 5; display: grid; gap: var(--ep-space-5); align-content: start; min-width: 0; }
.a-con-sec { grid-column: 7 / -1; display: grid; gap: var(--ep-space-4); align-content: start; min-width: 0; }
.a-con .lbl { color: var(--ep-text); }
.a-con h3.lbl { text-wrap: wrap; }

.a-email { display: grid; gap: var(--ep-space-4); border-block: 1px solid var(--ep-rule-strong); padding-block: clamp(18px, 2.2vw, 28px); min-width: 0; }
.a-email-row { max-width: none; min-width: 0; }
.a-email-addr {
  display: inline-block; max-width: 100%;
  font-family: var(--ep-font-mono); font-stretch: var(--ep-width-data); font-weight: 300;
  font-size: clamp(24px, 3.1vw, 44px); line-height: 1.1; letter-spacing: -.025em; color: var(--ep-text);
  overflow-wrap: anywhere; user-select: all; -webkit-user-select: all; cursor: text;
}
.a-email-actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--ep-space-3) var(--ep-space-6); }

.a-steps { display: grid; border-top: 1px solid var(--ep-rule); }
.a-step { display: grid; grid-template-columns: 28px minmax(0, 1fr); column-gap: var(--ep-space-4); padding-block: 14px; border-bottom: 1px solid var(--ep-rule); }
.a-step-no {
  display: grid; place-items: center; width: 24px; height: 24px; margin-top: 1px;
  border: 1px solid var(--ep-rule-strong); color: var(--ep-text); font-size: 11.5px;
}
.a-step p { font-size: 15.5px; line-height: 1.55; color: var(--ep-text-2); }
.a-step b { font-weight: 600; color: var(--ep-text); }
.a-step .mono { color: var(--ep-text); }
.a-sectxt { display: grid; gap: var(--ep-space-3); margin-top: var(--ep-space-2); }
.a-sectxt .cmd { max-width: 560px; }

@media (max-width: 900px) {
  .a-con-mail, .a-con-sec { grid-column: 1 / -1; }
  .a-email-addr { font-size: clamp(27px, 6.4vw, 44px); }
  .a-con { row-gap: var(--ep-space-7); }
}

/* ---------- brand assets ---------- */
.a-rule {
  display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--ep-col-gap); row-gap: var(--ep-space-2);
  max-width: none; align-items: baseline;
  padding-block: var(--ep-space-4); border-block: 1px solid var(--ep-rule-strong);
}
.a-rule .lbl { grid-column: 1 / span 3; color: var(--ep-text); }
.a-rule > span:last-child { grid-column: 4 / -1; font-stretch: var(--ep-width-heading); font-weight: 500; font-size: clamp(16.5px, 1.4vw, 19px); line-height: 1.45; max-width: 64ch; }

.a-assets { display: grid; }
.a-asset {
  display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--ep-col-gap); row-gap: var(--ep-space-5);
  padding-block: clamp(24px, 3vw, 40px); border-bottom: 1px solid var(--ep-rule); align-items: start;
}
.a-stage { grid-column: 1 / span 7; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border: 1px solid var(--ep-rule-strong); min-width: 0; }
.a-half { position: relative; display: grid; place-items: center; min-height: 208px; padding: 40px 16px 24px; min-width: 0; }
.a-half + .a-half { border-left: 1px solid var(--ep-rule-strong); }
.a-half-cap { position: absolute; top: 10px; left: 12px; font-size: 10.5px; color: var(--ep-text-3); letter-spacing: .02em; }

/* clear space: one quadrant of the mark (13 of its 30 units) on every side, drawn dashed */
.a-clear { --u: 2.4px; --h: 30; display: block; padding: calc(13 * var(--u)); outline: 1px dashed var(--ep-rule-strong); outline-offset: 0; }
.a-clear img { display: block; width: auto; height: calc(var(--h) * var(--u)); max-width: none; }
.a-asset-lkh .a-clear { --u: 1.2px; --h: 30; }
.a-asset-lkv .a-clear { --u: 1.5px; --h: 48; }

.a-asset-body { grid-column: 9 / -1; display: grid; gap: var(--ep-space-4); align-content: start; min-width: 0; }
.a-asset-head { display: grid; gap: 6px; }
.a-asset-head h3 { font-stretch: var(--ep-width-display); font-weight: 520; font-size: clamp(21px, 1.9vw, 26px); line-height: 1.1; letter-spacing: -.008em; }
.a-asset-body .small { max-width: 52ch; }
.a-asset-body .small .mono { font-size: 12.5px; }

.a-dl { display: grid; border-top: 1px solid var(--ep-rule-strong); }
.a-dl-a {
  display: grid; grid-template-columns: 16px minmax(0, 1fr) 18px; column-gap: var(--ep-space-3); row-gap: 2px; align-items: center;
  padding-block: 12px; border-bottom: 1px solid var(--ep-rule); color: var(--ep-text); text-decoration: none;
}
/* the ink on the ground it is for: a small plate of that ground with the ink inside it */
.a-ink { grid-row: 1; grid-column: 1; width: 16px; height: 16px; background: var(--ep-text); box-shadow: inset 0 0 0 4px var(--ep-ground); border: 1px solid var(--ep-rule-strong); }
.a-dl-t { grid-row: 1; grid-column: 2; display: flex; flex-wrap: wrap; align-items: baseline; gap: 2px 10px; min-width: 0; }
.a-dl-name { font-weight: 560; font-size: 15.5px; text-decoration: underline; text-decoration-color: var(--ep-link-line); text-underline-offset: .24em; text-decoration-thickness: 1px; }
.a-dl-use { font-size: 14px; color: var(--ep-text-2); }
.a-dl-file { grid-row: 2; grid-column: 2; font-size: 11.5px; color: var(--ep-text-3); overflow-wrap: anywhere; }
.a-dl-ic { grid-row: 1 / span 2; grid-column: 3; justify-self: end; transform: rotate(90deg); color: var(--ep-text-2); transition: transform .15s; }
.a-dl-a:hover .a-dl-name { text-decoration-color: var(--ep-link-line-hover); text-decoration-thickness: 2px; }
.a-dl-a:hover .a-dl-ic { color: var(--ep-text); transform: rotate(90deg) translateX(2px); }
.a-dl-a:hover .a-dl-file { color: var(--ep-text-2); }

.a-assets-foot { margin-top: var(--ep-space-5); max-width: 80ch; }

@media (max-width: 1180px) {
  .a-asset-lkh .a-clear { --u: 1px; }
  .a-asset-mark .a-clear { --u: 2.1px; }
  .a-stage { grid-column: 1 / span 7; }
  .a-asset-body { grid-column: 8 / -1; }
}
@media (max-width: 900px) {
  .a-stage, .a-asset-body, .a-rule .lbl, .a-rule > span:last-child { grid-column: 1 / -1; }
}
@media (max-width: 620px) {
  .a-stage { grid-template-columns: minmax(0, 1fr); }
  .a-half { min-height: 168px; }
  .a-half + .a-half { border-left: 0; border-top: 1px solid var(--ep-rule-strong); }
  .a-asset-mark .a-clear { --u: 2px; }
}