/* Addi architecture disclosure site.
   Visual system copied from CCLP-GHL-Workbench blocks/reference (LANDING.html,
   HEADER.html). Tokens verbatim; doc-* classes are documented extensions
   (DESIGN_CASE.md). One deliberate deviation: no negative letter-spacing. */

:root {
  --c2-teal: #004E4D; --c2-teal-deep: #00302F;
  --c2-orange: #D98929; --c2-orange-deep: #A65F12;
  --c2-black: #0A0A0A; --c2-ink: #14110B; --c2-ink-mute: #5C5343;
  --c2-rule: #E7E2D6; --c2-paper: #FAF7EE;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
  --font-serif: Georgia, 'Times New Roman', serif;
  --pc-max: 720px; --pc-pad-x: clamp(20px, 4vw, 32px);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: var(--font-sans); color: var(--c2-ink); line-height: 1.55; background: #FFF; }

/* The tricolor stripe */
.c2-stripe { position: sticky; top: 0; z-index: 4; display: grid; grid-template-columns: 1fr 2fr 1fr; height: 6px; }
.c2-stripe--foot { position: static; }
.c2-stripe i { display: block; height: 100%; }
.c2-stripe i:nth-child(1) { background: var(--c2-teal); }
.c2-stripe i:nth-child(2) { background: var(--c2-black); }
.c2-stripe i:nth-child(3) { background: var(--c2-orange); }

/* Brand bar + nav */
.c2-bar { display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; padding: 18px clamp(28px, 4vw, 56px); border-bottom: 1px solid var(--c2-rule); background: #FFF; }
.c2-bar__brand img { height: 48px; width: auto; display: block; }
.c2-nav { display: flex; flex-wrap: wrap; gap: 4px 18px; }
.c2-nav a { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.16em; text-transform: uppercase; font-weight: 700; color: var(--c2-ink-mute); text-decoration: none; padding: 6px 0; position: relative; white-space: nowrap; }
.c2-nav a:hover { color: var(--c2-teal-deep); }
.c2-nav a.is-current { color: var(--c2-ink); }
.c2-nav a.is-current::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px; background: var(--c2-orange-deep); border-radius: 1px; }

/* Heroes */
.ld-hero { background: linear-gradient(180deg, #003838 0%, #00282b 100%); color: #FFF; padding: clamp(56px, 7vw, 92px) var(--pc-pad-x) clamp(44px, 5vw, 68px); }
.ld-hero__inner { max-width: var(--pc-max); margin: 0 auto; }
.ld-hero__eyebrow { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.22em; text-transform: uppercase; font-weight: 700; color: #E97849; margin: 0 0 18px; }
.ld-hero__h { font-family: var(--font-serif); font-size: clamp(34px, 5vw, 54px); line-height: 1.05; margin: 0 0 18px; font-weight: 700; color: #FFF; }
.ld-hero__sub { font-size: clamp(17px, 1.4vw, 20px); line-height: 1.55; color: #d8e4e4; margin: 0; max-width: 56ch; }
.doc-hero { padding: clamp(36px, 4.5vw, 56px) var(--pc-pad-x) clamp(30px, 3.5vw, 44px); }
.doc-hero .ld-hero__h { font-size: clamp(28px, 3.6vw, 40px); }

/* Sections */
.ld-sec { padding: clamp(40px, 5vw, 64px) var(--pc-pad-x); }
.ld-sec--white { background: #FFF; }
.ld-sec--paper { background: var(--c2-paper); }
.ld-sec__inner { max-width: var(--pc-max); margin: 0 auto; }
.ld-mark { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.22em; text-transform: uppercase; font-weight: 700; color: var(--c2-orange-deep); margin: 0 0 14px; }
.ld-h2 { font-family: var(--font-serif); font-size: clamp(24px, 3vw, 32px); line-height: 1.15; margin: 0 0 16px; font-weight: 700; }
.doc-h3 { font-family: var(--font-serif); font-size: 20px; line-height: 1.25; margin: 28px 0 10px; font-weight: 700; color: var(--c2-teal-deep); }
.ld-p { font-size: 16px; line-height: 1.65; margin: 0 0 14px; max-width: 62ch; }
.ld-note { font-size: 13.5px; color: var(--c2-ink-mute); line-height: 1.6; margin: 16px 0 0; }
.doc-prose ul, .doc-prose ol { margin: 0 0 14px; padding-left: 22px; }
.doc-prose li { font-size: 15.5px; line-height: 1.65; margin: 0 0 8px; max-width: 60ch; }
.doc-prose b, .doc-prose strong { color: var(--c2-teal-deep); }
.doc-prose a { color: var(--c2-teal-deep); }

/* Cards */
.ld-card { border: 1px solid var(--c2-rule); border-radius: 10px; background: #FFF; padding: 24px 26px; margin-top: 20px; }
.ld-card__team { font-size: 19px; font-weight: 700; color: var(--c2-teal-deep); margin: 0 0 4px; }
.ld-card__meta { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--c2-ink-mute); margin: 0 0 12px; }
.doc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 20px; }
@media (max-width: 640px) { .doc-grid { grid-template-columns: 1fr; } }
.doc-card { border: 1px solid var(--c2-rule); border-radius: 10px; background: #FFF; padding: 18px 20px; text-decoration: none; color: var(--c2-ink); display: block; transition: border-color 0.15s ease; }
.doc-card:hover { border-color: var(--c2-teal-deep); }
.doc-card__t { font-family: var(--font-serif); font-size: 17px; font-weight: 700; color: var(--c2-teal-deep); margin: 0 0 6px; }
.doc-card__d { font-size: 13.5px; line-height: 1.55; color: var(--c2-ink-mute); margin: 0; }

/* Steps (teal counters) */
.ld-steps { list-style: none; counter-reset: s; margin: 20px 0 0; padding: 0; }
.ld-steps li { counter-increment: s; position: relative; padding: 0 0 0 44px; margin: 0 0 16px; font-size: 15.5px; line-height: 1.6; }
.ld-steps li::before { content: counter(s); position: absolute; left: 0; top: -1px; width: 28px; height: 28px; border-radius: 50%; background: var(--c2-teal-deep); color: #FFF; font: 700 13px/28px var(--font-sans); text-align: center; }
.ld-steps b { color: var(--c2-teal-deep); }

/* Buttons */
.ld-btn { display: inline-block; background: var(--c2-orange-deep); color: #FFF; text-decoration: none; font-weight: 700; font-size: 15px; padding: 12px 24px; border-radius: 6px; }
.ld-btn--ghost { background: transparent; color: var(--c2-teal-deep); border: 1.5px solid var(--c2-rule); }

/* Doc extensions: crumbs, TOC, tables, tier chips, withheld notes, mermaid */
.crumbs { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--c2-ink-mute); margin: 0 0 16px; }
.crumbs a { color: var(--c2-ink-mute); text-decoration: none; }
.crumbs a:hover { color: var(--c2-teal-deep); }
.doc-toc { border: 1px solid var(--c2-rule); border-radius: 10px; background: var(--c2-paper); padding: 20px 24px; margin: 20px 0 0; columns: 2; column-gap: 28px; }
@media (max-width: 640px) { .doc-toc { columns: 1; } }
.doc-toc a { display: block; font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.06em; color: var(--c2-teal-deep); text-decoration: none; padding: 4px 0; break-inside: avoid; }
.doc-toc a:hover { color: var(--c2-orange-deep); }
.doc-table-wrap { overflow-x: auto; margin: 20px 0 0; }
.doc-table { border-collapse: collapse; width: 100%; font-size: 14px; line-height: 1.5; }
.doc-table th { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.12em; text-transform: uppercase; text-align: left; color: var(--c2-ink-mute); background: var(--c2-paper); border: 1px solid var(--c2-rule); padding: 10px 12px; }
.doc-table td { border: 1px solid var(--c2-rule); padding: 10px 12px; vertical-align: top; }
.tier-chip { display: inline-block; font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; font-weight: 700; border: 1px solid var(--c2-rule); border-radius: 999px; padding: 2px 10px; color: var(--c2-ink-mute); white-space: nowrap; }
.tier-chip--t2 { color: var(--c2-teal-deep); border-color: var(--c2-teal-deep); }
.tier-chip--t3 { color: var(--c2-orange-deep); border-color: var(--c2-orange-deep); }
.withheld { border: 1px solid var(--c2-rule); border-left: 3px solid var(--c2-orange-deep); border-radius: 6px; background: var(--c2-paper); padding: 14px 18px; font-size: 14px; line-height: 1.6; color: var(--c2-ink); margin: 18px 0 0; max-width: 62ch; }
.withheld .ld-mark { margin: 0 0 6px; }
.mermaid-wrap { border: 1px solid var(--c2-rule); border-radius: 10px; background: #FFF; padding: 20px; margin: 20px 0 0; overflow-x: auto; }
.mermaid-wrap .mermaid { display: flex; justify-content: center; }

/* Footer */
.ld-foot { background: var(--c2-paper); padding: 32px var(--pc-pad-x); border-top: 1px solid var(--c2-rule); }
.ld-foot__inner { max-width: var(--pc-max); margin: 0 auto; display: flex; flex-wrap: wrap; gap: 12px 24px; justify-content: space-between; font-size: 13px; color: var(--c2-ink-mute); }
.ld-foot a { color: var(--c2-ink-mute); }