/* Cover4 site styles. No external fonts, no scripts. Tokens first. */
:root {
  --ink: #131C27;          /* near-black */
  --ink-2: #1D2836;        /* raised dark surface */
  --ink-3: #2A3647;        /* dark rule */
  --paper: #F6F5F1;        /* off-white page */
  --paper-2: #ECEAE3;      /* tinted panel */
  --white: #FFFFFF;
  --rule: #131C27;
  --rule-soft: #C9C6BC;
  --text: #131C27;
  --muted: #4A5563;        /* 7:1 on paper */
  --on-dark: #F4F2EC;
  --on-dark-muted: #A9B4C2;
  --orange: #E46C2D;       /* alerts and actions only */
  --orange-text: #A4441A;  /* orange for text on light: AA */
  --purple: #4B2E83;       /* accent */
  --purple-on-dark: #C3B2EC;
  --green-on-dark: #8FD3A6;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --wrap: 1180px;
  --gutter: 16px;
  --bw: 1.5px;
}
@media (min-width: 720px) { :root { --gutter: 28px; } }

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
  font-feature-settings: "tnum" 1;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--purple); text-underline-offset: 2px; }
a:hover { color: var(--ink); }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 2px; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.01em; margin: 0 0 .5em; }
h1 { font-size: clamp(2rem, 5.2vw, 3.35rem); font-weight: 750; max-width: 22ch; }
h2 { font-size: clamp(1.45rem, 3vw, 2.05rem); font-weight: 720; max-width: 30ch; }
h3 { font-size: 1.08rem; font-weight: 700; }
p { margin: 0 0 1em; max-width: 70ch; }
ul, ol { padding-left: 1.2em; }
li { margin: .25em 0; }
strong { font-weight: 700; }
code, .mono { font-family: var(--mono); font-size: .9em; }

.skip { position: absolute; left: -9999px; top: 0; background: var(--orange); color: var(--ink); padding: 8px 12px; z-index: 10; font-weight: 700; }
.skip:focus { left: 8px; top: 8px; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- Header ---------- */
.top { background: var(--ink); color: var(--on-dark); border-bottom: 3px solid var(--orange); position: relative; z-index: 5; }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 60px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--on-dark); text-decoration: none; }
.brand img { height: 26px; width: auto; }
.brand .by { font-family: var(--mono); font-size: 11px; letter-spacing: .08em; color: var(--on-dark-muted); text-transform: uppercase; display: none; }
@media (min-width: 980px) { .brand .by { display: inline; } }
.nav { display: none; }
.nav a, .nav summary { color: var(--on-dark); text-decoration: none; font-family: var(--mono); font-size: 13px; letter-spacing: .06em; text-transform: uppercase; }
.nav a:hover, .nav summary:hover { color: var(--orange); }
.nav a[aria-current="page"], .nav .is-current > summary { color: var(--orange); }
@media (min-width: 900px) {
  .nav { display: flex; align-items: center; gap: 26px; }
  .menu-m { display: none; }
}
.nav details { position: relative; }
.nav summary { cursor: pointer; list-style: none; }
.nav summary::-webkit-details-marker { display: none; }
.nav summary::after { content: " \25BE"; }
.dd { position: absolute; top: calc(100% + 18px); left: -18px; width: 360px; background: var(--ink); border: var(--bw) solid var(--ink-3); border-top: 3px solid var(--orange); padding: 8px 0; }
.dd a { display: grid; grid-template-columns: 1fr; padding: 9px 18px; text-transform: none; letter-spacing: 0; font-family: var(--sans); font-size: 15px; }
.dd a span { font-family: var(--mono); font-size: 11px; color: var(--on-dark-muted); letter-spacing: .06em; text-transform: uppercase; }
.dd hr { border: 0; border-top: 1px solid var(--ink-3); margin: 6px 0; }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--orange); color: var(--ink); text-decoration: none;
  font-family: var(--mono); font-weight: 700; font-size: 14px; letter-spacing: .04em;
  padding: 12px 18px; border: var(--bw) solid var(--ink); min-height: 44px;
}
.btn:hover { background: var(--ink); color: var(--orange); border-color: var(--orange); }
.top .btn { padding: 8px 14px; min-height: 40px; font-size: 12.5px; border-color: var(--orange); }
.btn .arr { font-family: var(--mono); }

/* Mobile menu (no script: details/summary) */
.menu-m > summary { list-style: none; cursor: pointer; font-family: var(--mono); font-size: 13px; letter-spacing: .08em; text-transform: uppercase; border: var(--bw) solid var(--on-dark-muted); padding: 8px 12px; min-height: 40px; display: inline-flex; align-items: center; color: var(--on-dark); }
.menu-m > summary::-webkit-details-marker { display: none; }
.menu-m[open] > summary { border-color: var(--orange); color: var(--orange); }
.menu-m .sheet { position: absolute; left: 0; right: 0; top: 100%; background: var(--ink); border-top: 1px solid var(--ink-3); border-bottom: 3px solid var(--orange); padding: 8px var(--gutter) 18px; }
.menu-m .sheet a { display: block; color: var(--on-dark); text-decoration: none; padding: 10px 0; border-bottom: 1px solid var(--ink-3); font-size: 16px; }
.menu-m .sheet .grp { font-family: var(--mono); font-size: 11px; letter-spacing: .1em; color: var(--on-dark-muted); text-transform: uppercase; padding: 14px 0 4px; }
.menu-m .sheet .btn { margin-top: 16px; border-bottom: var(--bw) solid var(--ink); color: var(--ink); }

/* ---------- Status strip ---------- */
.strip { background: var(--ink-2); color: var(--on-dark-muted); font-family: var(--mono); font-size: 12px; letter-spacing: .04em; }
.strip .wrap { display: flex; flex-wrap: wrap; gap: 6px 22px; padding-top: 8px; padding-bottom: 8px; }
.strip b { color: var(--on-dark); font-weight: 600; }

/* ---------- Sections ---------- */
section { padding: 56px 0; border-bottom: var(--bw) solid var(--rule); }
section.tight { padding: 40px 0; }
@media (min-width: 720px) { section { padding: 76px 0; } }
.kicker { font-family: var(--mono); font-size: 12.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin: 0 0 14px; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.kicker .n { background: var(--ink); color: var(--on-dark); padding: 2px 7px; }
.lead { font-size: clamp(1.08rem, 1.8vw, 1.28rem); line-height: 1.5; max-width: 62ch; color: var(--text); }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.src { font-family: var(--mono); font-size: 12px; color: var(--muted); letter-spacing: .02em; margin-top: 14px; max-width: none; }

/* Hero */
.hero { background: var(--paper); padding: 48px 0 56px; }
@media (min-width: 720px) { .hero { padding: 72px 0 80px; } }
.hero-grid { display: grid; gap: 36px; }
@media (min-width: 1000px) { .hero-grid { grid-template-columns: 1.05fr 1fr; align-items: start; gap: 48px; } }
.hero .actions { display: flex; flex-wrap: wrap; gap: 14px 20px; align-items: center; margin-top: 26px; }
.hero .actions .note { font-family: var(--mono); font-size: 12.5px; color: var(--muted); }

/* Page header (inner pages) */
.phead { padding: 44px 0 48px; }
@media (min-width: 720px) { .phead { padding: 64px 0 64px; } }
.phead .who { font-family: var(--mono); font-size: 13px; color: var(--muted); margin-top: 18px; max-width: 70ch; }
.phead .who b { color: var(--text); }

/* ---------- Tags ---------- */
.tag { display: inline-block; font-family: var(--mono); font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; padding: 2px 7px; border: 1.5px solid currentColor; line-height: 1.5; white-space: nowrap; vertical-align: middle; }
.tag--bench { background: var(--purple); color: var(--white); border-color: var(--purple); }
.tag--sim { background: var(--ink); color: var(--on-dark); border-color: var(--ink); }
.tag--twin { background: var(--white); color: var(--ink); border-color: var(--ink); }
.tag--built { background: var(--white); color: var(--purple); border-color: var(--purple); }
.tag--designed, .tag--planned { background: transparent; color: var(--ink); border-style: dashed; }
.tag--est, .tag--illus { background: transparent; color: var(--muted); }
.tag--notyet { background: var(--white); color: var(--orange-text); border-color: var(--orange-text); }
.tag--filed { background: transparent; color: var(--ink); }
.dark .tag--sim { background: var(--on-dark); color: var(--ink); border-color: var(--on-dark); }
.dark .tag--bench { background: var(--purple); color: var(--white); border-color: var(--purple-on-dark); }
.dark .tag--notyet { background: transparent; color: var(--orange); border-color: var(--orange); }
.dark .tag--designed, .dark .tag--planned, .dark .tag--est, .dark .tag--illus, .dark .tag--filed { color: var(--on-dark-muted); }
.dark .tag--twin, .dark .tag--built { background: transparent; color: var(--on-dark); border-color: var(--on-dark-muted); }

/* ---------- Panels (black header bar, hard rules) ---------- */
.panel { border: var(--bw) solid var(--rule); background: var(--white); }
.panel-h { background: var(--ink); color: var(--on-dark); font-family: var(--mono); font-size: 12px; letter-spacing: .1em; text-transform: uppercase; padding: 8px 14px; display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; }
.panel-h .tag { font-size: 10.5px; }
.panel-b { padding: 18px; }
.panel-b > :last-child { margin-bottom: 0; }
.panel + .panel { margin-top: 22px; }

.grid { display: grid; gap: 18px; }
@media (min-width: 720px) { .g2 { grid-template-columns: 1fr 1fr; } .g3 { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 720px) and (max-width: 1023px) { .g4 { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .g4 { grid-template-columns: repeat(4, 1fr); } }
.cells { display: grid; border: var(--bw) solid var(--rule); background: var(--white); }
.cells > div { padding: 18px; border-top: var(--bw) solid var(--rule); }
.cells > div:first-child { border-top: 0; }
@media (min-width: 720px) {
  .cells.c3 { grid-template-columns: repeat(3, 1fr); }
  .cells.c3 > div { border-top: 0; border-left: var(--bw) solid var(--rule); }
  .cells.c3 > div:first-child { border-left: 0; }
}
.cells h3 { font-family: var(--mono); font-size: 12.5px; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 10px; }
.cells p { margin: 0; }
.cells .res { background: var(--ink); color: var(--on-dark); }
.cells .res h3 { color: var(--orange); }

.figs { display: flex; flex-wrap: wrap; gap: 10px 40px; margin: 26px 0 0; padding: 0; list-style: none; }
.figs li { margin: 0; }
.figs .v { font-family: var(--mono); font-size: clamp(1.6rem, 3.4vw, 2.2rem); font-weight: 700; display: block; line-height: 1.1; }
.figs .l { font-size: 14px; color: var(--muted); }

/* Steps / lanes */
.steps { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 0; border: var(--bw) solid var(--rule); background: var(--white); counter-reset: s; }
.steps li { margin: 0; padding: 18px; border-top: var(--bw) solid var(--rule); position: relative; }
.steps li:first-child { border-top: 0; }
@media (min-width: 900px) {
  .steps { grid-template-columns: repeat(4, 1fr); }
  .steps.s5 { grid-template-columns: repeat(5, 1fr); }
  .steps li { border-top: 0; border-left: var(--bw) solid var(--rule); }
  .steps li:first-child { border-left: 0; }
  .steps li:not(:last-child)::after { content: ""; position: absolute; right: -7px; top: 26px; width: 12px; height: 12px; background: var(--paper); border-top: var(--bw) solid var(--rule); border-right: var(--bw) solid var(--rule); transform: rotate(45deg); z-index: 1; }
}
.steps .no { font-family: var(--mono); font-size: 12px; letter-spacing: .1em; color: var(--muted); display: block; margin-bottom: 6px; }
.steps h3 { font-family: var(--mono); font-size: 14px; letter-spacing: .06em; text-transform: uppercase; }
.steps p { margin: 0; font-size: 15.5px; }
.steps .tag { margin-top: 10px; }

.keepadd { display: grid; border: var(--bw) solid var(--rule); margin-top: 28px; background: var(--white); }
@media (min-width: 800px) { .keepadd { grid-template-columns: 1fr 1fr; } .keepadd > div + div { border-left: var(--bw) solid var(--rule); } }
@media (max-width: 799px) { .keepadd > div + div { border-top: var(--bw) solid var(--rule); } }
.keepadd h3 { font-family: var(--mono); font-size: 12.5px; letter-spacing: .1em; text-transform: uppercase; padding: 8px 14px; margin: 0; }
.keepadd .k h3 { background: var(--paper-2); border-bottom: var(--bw) solid var(--rule); }
.keepadd .a h3 { background: var(--ink); color: var(--on-dark); }
.keepadd ul { margin: 0; padding: 14px 18px 16px 34px; }
.keepadd li { margin: .4em 0; }

/* ---------- Status block (console log) ---------- */
.dark { background: var(--ink); color: var(--on-dark); }
.dark a { color: var(--purple-on-dark); }
.dark a:hover { color: var(--on-dark); }
.dark .muted, .dark .kicker, .dark .src { color: var(--on-dark-muted); }
.dark .kicker .n { background: var(--orange); color: var(--ink); }
.status { border: var(--bw) solid var(--ink-3); background: #0E151E; margin-top: 26px; }
.status-h { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 6px 16px; padding: 10px 14px; border-bottom: var(--bw) solid var(--ink-3); font-family: var(--mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--on-dark-muted); }
.status-h b { color: var(--on-dark); font-weight: 600; }
.status-h .live { color: var(--green-on-dark); }
.status table { width: 100%; border-collapse: collapse; }
.status th, .status td { text-align: left; vertical-align: top; padding: 11px 14px; border-bottom: 1px solid var(--ink-3); font-size: 15px; }
.status thead th { font-family: var(--mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--on-dark-muted); font-weight: 600; }
.status td.d { font-family: var(--mono); font-size: 13px; color: var(--on-dark-muted); white-space: nowrap; }
.status td.t { width: 1%; white-space: nowrap; }
.status td .num { font-family: var(--mono); color: var(--on-dark); font-weight: 700; }
.status tr.notyet td { background: rgba(228,108,45,.08); }
@media (max-width: 719px) {
  .status thead { display: none; }
  .status tr { display: grid; grid-template-columns: auto 1fr; gap: 4px 12px; padding: 12px 14px; border-bottom: 1px solid var(--ink-3); }
  .status td { border: 0; padding: 0; }
  .status td.r { grid-column: 1 / -1; }
}
.status-f { padding: 10px 14px; font-family: var(--mono); font-size: 12px; color: var(--on-dark-muted); }

/* ---------- Spec table ---------- */
.spec { width: 100%; border-collapse: collapse; background: var(--white); border: var(--bw) solid var(--rule); font-size: 15.5px; }
.spec caption { caption-side: top; text-align: left; background: var(--ink); color: var(--on-dark); font-family: var(--mono); font-size: 12px; letter-spacing: .1em; text-transform: uppercase; padding: 8px 14px; }
.spec th, .spec td { text-align: left; vertical-align: top; padding: 10px 14px; border-top: 1px solid var(--rule-soft); }
.spec th { font-family: var(--mono); font-size: 12.5px; letter-spacing: .04em; font-weight: 600; color: var(--muted); width: 38%; }
.spec td .num { font-family: var(--mono); font-weight: 700; }
.spec tfoot td { font-family: var(--mono); font-size: 12px; color: var(--muted); background: var(--paper); }
@media (max-width: 599px) {
  .spec th, .spec td { display: block; width: auto; }
  .spec th { padding-bottom: 0; border-top: 1px solid var(--rule-soft); }
  .spec td { border-top: 0; padding-top: 4px; }
}

/* ---------- Figures ---------- */
figure { margin: 0; }
.fig { border: var(--bw) solid var(--rule); background: var(--white); }
.fig .fig-h { background: var(--ink); color: var(--on-dark); font-family: var(--mono); font-size: 11.5px; letter-spacing: .08em; text-transform: uppercase; padding: 7px 12px; display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; align-items: center; }
.fig img { width: 100%; }
.fig figcaption { font-family: var(--mono); font-size: 12.5px; line-height: 1.5; color: var(--muted); padding: 10px 12px; border-top: var(--bw) solid var(--rule); }
.fig figcaption a { white-space: nowrap; }
.fig.phone { max-width: 320px; }
.fig.phone img { background: #B22622; }
.split { display: grid; gap: 22px; align-items: start; }
@media (min-width: 900px) { .split { grid-template-columns: 1fr 1.25fr; gap: 32px; } }

/* ---------- Segment index ---------- */
.segs { display: grid; gap: 0; border: var(--bw) solid var(--rule); background: var(--white); margin-top: 28px; }
@media (min-width: 720px) { .segs { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1040px) { .segs { grid-template-columns: repeat(3, 1fr); } }
.segs a { display: block; padding: 18px 18px 20px; color: var(--text); text-decoration: none; border-top: var(--bw) solid var(--rule); border-left: 0; }
.segs a:hover { background: var(--paper-2); }
.segs a:hover h3 { color: var(--orange-text); }
.segs a:focus-visible { outline-offset: -4px; }
.segs .code { font-family: var(--mono); font-size: 11px; letter-spacing: .1em; color: var(--muted); text-transform: uppercase; }
.segs h3 { margin: 4px 0 6px; font-size: 1.12rem; }
.segs p { margin: 0; font-size: 15px; color: var(--muted); }
.segs a.partner { background: var(--ink); color: var(--on-dark); }
.segs a.partner p, .segs a.partner .code { color: var(--on-dark-muted); }
.segs a.partner h3 { color: var(--on-dark); }
.segs a.partner:hover { background: var(--ink-2); }
.segs a.partner:hover h3 { color: var(--orange); }
@media (max-width: 719px) { .segs a:first-child { border-top: 0; } }
@media (min-width: 720px) and (max-width: 1039px) {
  .segs a:nth-child(-n+2) { border-top: 0; }
  .segs a:nth-child(2n) { border-left: var(--bw) solid var(--rule); }
}
@media (min-width: 1040px) {
  .segs a:nth-child(-n+3) { border-top: 0; }
  .segs a:not(:nth-child(3n+1)) { border-left: var(--bw) solid var(--rule); }
}

/* ---------- Lists with markers ---------- */
.checks { list-style: none; padding: 0; margin: 0; }
.checks li { padding: 10px 0 10px 28px; border-top: 1px solid var(--rule-soft); position: relative; margin: 0; }
.checks li:first-child { border-top: 0; }
.checks li::before { content: ""; position: absolute; left: 2px; top: 17px; width: 10px; height: 10px; border: var(--bw) solid var(--ink); }
.checks.lim li::before { border-color: var(--orange-text); background: transparent; }

.limits { border: var(--bw) solid var(--orange-text); background: var(--white); margin-top: 26px; }
.limits .panel-h { background: var(--white); color: var(--orange-text); border-bottom: var(--bw) solid var(--orange-text); }
.limits ul { margin: 0; padding: 12px 18px 14px; }

blockquote.approved { margin: 0; padding: 18px 20px; border-left: 4px solid var(--purple); background: var(--white); font-size: 16.5px; }
blockquote.approved p { max-width: none; }

/* ---------- CTA ---------- */
.cta { background: var(--ink); color: var(--on-dark); border-bottom: 0; }
.cta .wrap { display: grid; gap: 22px; }
@media (min-width: 900px) { .cta .wrap { grid-template-columns: 1.4fr 1fr; align-items: end; } }
.cta h2 { color: var(--on-dark); }
.cta p { color: var(--on-dark-muted); }
.cta .btn { border-color: var(--orange); }
.cta .addr { font-family: var(--mono); font-size: 13px; color: var(--on-dark-muted); margin-top: 12px; }

/* ---------- Footer ---------- */
.foot { background: var(--ink-2); color: var(--on-dark-muted); font-size: 14px; border-top: 3px solid var(--orange); }
.foot .wrap { padding-top: 34px; padding-bottom: 34px; display: grid; gap: 22px; }
@media (min-width: 900px) { .foot .wrap { grid-template-columns: 1.3fr 1fr 1fr; } }
.foot a { color: var(--on-dark); text-decoration: none; }
.foot a:hover { color: var(--orange); text-decoration: underline; }
.foot h2 { font-family: var(--mono); font-size: 11.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--on-dark-muted); margin: 0 0 10px; font-weight: 600; }
.foot ul { list-style: none; padding: 0; margin: 0; }
.foot li { margin: 6px 0; }
.foot .legal { font-family: var(--mono); font-size: 12px; line-height: 1.6; }
.foot .legal p { margin: 0 0 8px; }
.foot img { height: 22px; width: auto; margin-bottom: 12px; }

/* 404 */
.e404 { padding: 90px 0 110px; }
.e404 .code { font-family: var(--mono); font-size: 13px; letter-spacing: .1em; color: var(--orange-text); }

@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } }
@media print { .top, .strip, .foot, .cta { display: none; } section { border: 0; padding: 20px 0; } }

/* additions */
.status + .grid { margin-top: 30px; }
.dark .grid h3 { font-family: var(--mono); font-size: 13px; letter-spacing: .06em; text-transform: uppercase; }
.cells.m4 { gap: var(--bw); background: var(--rule); }
.cells.m4 > div { border: 0 !important; background: var(--white); }
@media (min-width: 720px) { .cells.m4 { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .cells.m4 { grid-template-columns: repeat(4, 1fr); } }
.panel-b h2 { font-size: 1.5rem; }
.nav a.btn, .menu-m .sheet a.btn { color: var(--ink); }
.nav a.btn:hover, .menu-m .sheet a.btn:hover { color: var(--orange); }
.fig-h .tag--sim, .panel-h .tag--sim { background: var(--on-dark); color: var(--ink); border-color: var(--on-dark); }
.fig-h .tag--illus, .fig-h .tag--est, .fig-h .tag--designed, .fig-h .tag--planned,
.panel-h .tag--illus, .panel-h .tag--est, .panel-h .tag--designed, .panel-h .tag--planned { color: var(--on-dark-muted); }
.fig-h .tag--bench, .panel-h .tag--bench { border-color: var(--purple-on-dark); }
.num { white-space: nowrap; }
@media (max-width: 719px) { .strip { font-size: 11px; } .strip .wrap { gap: 2px 16px; } }