/* ============================================================
   Design system: "FIELD DRAWING"
   The page reads as an engineering drawing sheet — warm paper,
   dot grid, mono annotations, serif titles, one red pencil accent.
   Semantic node colors reuse the Paper palette (visual-style.md).
   ============================================================ */

:root {
  /* surface & ink */
  --paper: #FAF9F5;
  --paper-2: #F4F2EC;
  --ink: #191A1E;
  --ink-2: #4B4D55;
  --faint: #8A8D98;
  --rule: #DCD9CF;
  --rule-soft: #E9E7DE;
  --dot: #DDDAD0;

  /* accents */
  --pencil: #D9480F;            /* annotation red — one warm accent */
  --trigger: #2F5FB3;           /* entry / links */
  --logic: #0E8A5F;
  --store: #7A4FD0;
  --ai: #C43D8E;
  --gate: #D33A2C;

  --serif: "Newsreader", "Iowan Old Style", Georgia, serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--serif);
  font-size: 16.5px;
  color: var(--ink);
  background-color: var(--paper);
  background-image: radial-gradient(var(--dot) 1px, transparent 1px);
  background-size: 22px 22px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

::selection { background: #F5D9C8; }

a { color: var(--trigger); }

/* ---- sheet frame: the whole page sits inside a drawing border ---- */

.sheet {
  max-width: 1160px;
  margin: 28px auto 60px;
  padding: 0 44px;
  border: 1px solid var(--ink);
  outline: 3px solid var(--paper);
  outline-offset: 4px;
  box-shadow: 0 0 0 5px var(--ink);
  background: var(--paper);
  position: relative;
}
/* fold / registration marks */
.sheet::before, .sheet::after {
  content: "+"; position: absolute; font-family: var(--mono);
  font-size: 14px; color: var(--faint);
}
.sheet::before { top: 6px; left: 8px; }
.sheet::after { top: 6px; right: 8px; }

.wrap { max-width: 980px; margin: 0 auto; }

/* ---- top strip (drawing header bar) ---- */

.topbar {
  display: flex; justify-content: space-between; align-items: baseline;
  font-family: var(--mono); font-size: 12px; letter-spacing: .04em;
  border-bottom: 1px solid var(--ink);
  padding: 14px 0 12px; color: var(--ink-2);
}
.topbar .dwg { color: var(--ink); font-weight: 700; }
.topbar nav a {
  color: var(--ink-2); text-decoration: none; margin-left: 22px;
  border-bottom: 1px solid transparent;
}
.topbar nav a:hover { color: var(--ink); border-bottom-color: var(--pencil); }

/* ---- section callouts ---- */

section { padding: 64px 0 8px; }

.callout {
  display: flex; align-items: baseline; gap: 14px;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 10px; margin-bottom: 34px;
}
.callout .no {
  font-family: var(--mono); font-size: 12px; font-weight: 700;
  background: var(--ink); color: var(--paper);
  padding: 3px 8px; letter-spacing: .06em;
}
.callout h2 {
  font-size: 30px; font-weight: 500; letter-spacing: -.01em;
}
.callout .note {
  margin-left: auto; font-family: var(--mono); font-size: 11.5px;
  color: var(--faint); letter-spacing: .05em; white-space: nowrap;
}
.lede { color: var(--ink-2); max-width: 42em; margin: -18px 0 30px; font-size: 17px; }

/* ---- hero / cover sheet ---- */

.cover { padding: 72px 0 56px; }
.cover .rev {
  font-family: var(--mono); font-size: 12px; color: var(--pencil);
  letter-spacing: .1em; text-transform: uppercase; margin-bottom: 22px;
}
.cover h1 {
  font-size: clamp(38px, 5.6vw, 62px); line-height: 1.06;
  font-weight: 480; letter-spacing: -.015em; max-width: 15em;
}
.cover h1 .annot { position: relative; white-space: nowrap; }
.cover h1 .annot::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: .08em;
  height: .14em; background:
    repeating-linear-gradient(-45deg, var(--pencil) 0 3px, transparent 3px 7px);
}
.cover .sub {
  margin-top: 26px; font-size: 18px; color: var(--ink-2); max-width: 38em;
}
.cover .sub b { color: var(--ink); }

.cover-cta { display: flex; gap: 12px; margin-top: 34px; flex-wrap: wrap; }
.btn {
  font-family: var(--mono); font-size: 13px; letter-spacing: .04em;
  padding: 11px 20px; text-decoration: none; border: 1px solid var(--ink);
  color: var(--ink); background: var(--paper);
  box-shadow: 3px 3px 0 var(--ink);
  transition: transform .1s ease, box-shadow .1s ease;
}
.btn:hover { transform: translate(-1px,-1px); box-shadow: 4px 4px 0 var(--ink); }
.btn:active { transform: translate(2px,2px); box-shadow: 1px 1px 0 var(--ink); }
.btn.solid { background: var(--ink); color: var(--paper); }
.btn.pencil { border-color: var(--pencil); color: var(--pencil); box-shadow: 3px 3px 0 var(--pencil); }
.btn.pencil:hover { box-shadow: 4px 4px 0 var(--pencil); }

/* spec strip under hero */
.specstrip {
  display: flex; gap: 0; margin-top: 52px;
  border: 1px solid var(--ink); font-family: var(--mono);
}
.specstrip div {
  flex: 1; padding: 12px 16px; border-right: 1px solid var(--ink);
}
.specstrip div:last-child { border-right: 0; }
.specstrip .v { font-size: 19px; font-weight: 700; }
.specstrip .k {
  font-size: 10.5px; text-transform: uppercase; letter-spacing: .08em;
  color: var(--faint); margin-top: 2px;
}

/* ---- workflow cards = schematic nodes on a bus ---- */

.busline {
  height: 1px; background: var(--ink); position: relative;
  margin: 0 8px 0 8px;
}
.busline::before {
  content: "SIGNAL BUS — demo lane, zero credentials";
  position: absolute; right: 4px; top: -18px;
  font-family: var(--mono); font-size: 10.5px; color: var(--faint);
  letter-spacing: .06em;
}

.nodes { display: grid; grid-template-columns: 1fr 1fr; gap: 26px 34px; }

.nodecard {
  position: relative; border: 1px solid var(--ink);
  background: var(--paper); padding: 0;
}
.nodecard::before {           /* drop line from bus into the node */
  content: ""; position: absolute; top: -27px; left: 26px;
  width: 1px; height: 26px; background: var(--ink);
}
.nodecard::after {            /* port dot */
  content: ""; position: absolute; top: -4px; left: 22px;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--paper); border: 2px solid var(--ink);
}
.nodecard .head {
  display: flex; align-items: baseline; gap: 10px;
  border-bottom: 1px solid var(--ink); padding: 10px 16px;
  font-family: var(--mono); font-size: 11.5px; color: var(--ink-2);
}
.nodecard .head .ty {
  font-weight: 700; color: var(--paper); background: var(--ink);
  padding: 1px 7px; letter-spacing: .06em;
}
.nodecard .head .ncount { margin-left: auto; color: var(--faint); }
.nodecard .body { padding: 18px 20px 20px; }
.nodecard h3 { font-size: 21px; font-weight: 560; }
.nodecard .use { color: var(--ink-2); font-size: 15px; font-style: italic; margin-top: 2px; }
.nodecard ul { list-style: none; margin-top: 14px; }
.nodecard li {
  font-size: 15px; padding-left: 18px; position: relative; margin-bottom: 5px;
}
.nodecard li::before {
  content: "▸"; position: absolute; left: 0; color: var(--pencil);
  font-family: var(--mono); font-size: 12px; top: 2px;
}
.testrow {
  margin: 16px 20px 0; border: 1px dashed var(--ink-2);
  font-family: var(--mono); font-size: 11.5px; line-height: 1.5;
  padding: 9px 12px; color: var(--ink-2); background: var(--paper-2);
}
.testrow b { color: var(--logic); }
.nodecard .foot {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 20px 16px;
}
.nodecard .foot a {
  font-family: var(--mono); font-size: 12.5px; font-weight: 600;
  text-decoration: none; border-bottom: 1px solid var(--trigger);
}
.nodecard .foot a:hover { border-bottom-color: var(--pencil); color: var(--pencil); }
.nodecard .foot .tag { font-family: var(--mono); font-size: 10.5px; color: var(--faint); }

/* ---- case study: figure + field notes ---- */

.figure {
  display: grid; grid-template-columns: 1fr 300px; gap: 0;
  border: 1px solid var(--ink);
}
.figure .imgbox { padding: 20px; border-right: 1px solid var(--ink); background: #fff; }
.figure .imgbox img { width: 100%; display: block; }
.figure .figcap {
  font-family: var(--mono); font-size: 11px; color: var(--faint);
  margin-top: 12px; letter-spacing: .04em;
}
.notes { padding: 22px 24px; background: var(--paper-2); }
.notes h3 {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--pencil); margin-bottom: 12px;
}
.notes p { font-size: 15px; color: var(--ink-2); margin-bottom: 12px; }
.notes ul { list-style: none; }
.notes li {
  font-size: 14.5px; padding-left: 16px; position: relative; margin-bottom: 7px;
}
.notes li::before { content: "—"; position: absolute; left: 0; color: var(--faint); }
.notes a { font-family: var(--mono); font-size: 12.5px; font-weight: 600; text-decoration: none; border-bottom: 1px solid var(--trigger); }

/* ---- legend table (differentiators) ---- */

.legend { width: 100%; border-collapse: collapse; border: 1px solid var(--ink); font-size: 15px; }
.legend caption {
  text-align: left; font-family: var(--mono); font-size: 11.5px;
  letter-spacing: .08em; color: var(--faint); padding-bottom: 8px;
}
.legend th, .legend td { border: 1px solid var(--rule); padding: 9px 14px; text-align: left; }
.legend th {
  font-family: var(--mono); font-size: 11px; text-transform: uppercase;
  letter-spacing: .08em; background: var(--paper-2); font-weight: 600;
}
.legend .sw { width: 16px; height: 16px; display: inline-block; vertical-align: -3px; margin-right: 10px; border: 1.5px solid; }
.sw.gate { background: #FEF2F2; border-color: var(--gate); }
.sw.logic { background: #ECFDF5; border-color: var(--logic); }
.sw.store { background: #F5F3FF; border-color: var(--store); }
.sw.ai { background: #FDF2F8; border-color: var(--ai); }
.sw.trigger { background: #EFF6FF; border-color: var(--trigger); }
.legend td { background: var(--paper); }
.legend .sym { font-family: var(--mono); font-size: 12px; color: var(--ink-2); white-space: nowrap; }

/* ---- process chain ---- */

.chain { display: flex; align-items: stretch; gap: 0; font-family: var(--mono); }
.chain .st {
  flex: 1; border: 1px solid var(--ink); background: var(--paper);
  padding: 14px 14px 12px; position: relative;
}
.chain .st + .st { margin-left: 18px; }
.chain .st + .st::before {           /* edge between stations */
  content: ""; position: absolute; left: -19px; top: 50%;
  width: 18px; height: 1px; background: var(--ink);
}
.chain .st + .st::after {            /* arrowhead */
  content: "▸"; position: absolute; left: -22px; top: calc(50% - 9px);
  font-size: 12px; color: var(--ink);
}
.chain .st .n { font-size: 10.5px; color: var(--pencil); font-weight: 700; letter-spacing: .08em; }
.chain .st h3 { font-family: var(--serif); font-size: 17px; font-weight: 560; margin: 4px 0 4px; }
.chain .st p { font-family: var(--serif); font-size: 13.5px; color: var(--ink-2); line-height: 1.45; }

/* ---- services: bill of materials ---- */

.bom { width: 100%; border-collapse: collapse; border: 1px solid var(--ink); }
.bom th, .bom td { border: 1px solid var(--rule); padding: 10px 14px; text-align: left; }
.bom th {
  font-family: var(--mono); font-size: 11px; text-transform: uppercase;
  letter-spacing: .08em; background: var(--ink); color: var(--paper); font-weight: 600;
}
.bom td { background: var(--paper); vertical-align: top; }
.bom .item { font-family: var(--mono); font-size: 12px; color: var(--pencil); font-weight: 700; white-space: nowrap; }
.bom .part { font-weight: 560; font-size: 15.5px; }
.bom .desc { color: var(--ink-2); font-size: 14.5px; }
.bom .qty { font-family: var(--mono); font-size: 11.5px; color: var(--faint); white-space: nowrap; }

/* ---- hire: control box + stamp ---- */

.hirebox {
  border: 2px solid var(--ink); padding: 44px 48px; position: relative;
  background: var(--paper);
}
.hirebox::before {   /* corner marks */
  content: ""; position: absolute; inset: 6px;
  border: 1px dashed var(--rule); pointer-events: none;
}
.hirebox h2 { font-size: 34px; font-weight: 500; letter-spacing: -.01em; max-width: 15em; }
.hirebox p { color: var(--ink-2); max-width: 40em; margin-top: 14px; font-size: 16.5px; }
.stamp {
  position: absolute; top: 30px; right: 40px; transform: rotate(6deg);
  font-family: var(--mono); font-weight: 700; font-size: 13px;
  letter-spacing: .14em; color: var(--pencil);
  border: 2.5px solid var(--pencil); border-radius: 6px;
  padding: 8px 14px; text-transform: uppercase; opacity: .9;
}
.hire-links {
  margin-top: 26px; font-family: var(--mono); font-size: 13px;
  display: flex; gap: 26px; flex-wrap: wrap;
}
.hire-links a { text-decoration: none; border-bottom: 1px solid var(--trigger); }
.hire-links .dim { color: var(--faint); }

/* ---- who I help: domain cards ---- */

.whos { display: grid; grid-template-columns: 1fr 1fr; gap: 26px 34px; }
.who {
  border: 1px solid var(--ink); background: var(--paper); padding: 20px 22px;
  position: relative;
}
.who .for {
  font-family: var(--mono); font-size: 10.5px; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase; color: var(--pencil);
}
.who h3 { font-size: 19px; font-weight: 560; margin-top: 6px; }
.who .pain { font-size: 14.5px; color: var(--ink-2); font-style: italic; margin-top: 6px; }
.who .fit {
  margin-top: 14px; padding-top: 12px; border-top: 1px dashed var(--rule);
  font-family: var(--mono); font-size: 11.5px; color: var(--ink-2); line-height: 1.6;
}
.who .fit a { color: var(--trigger); text-decoration: none; border-bottom: 1px solid var(--trigger); }
.who .fit .lbl { color: var(--faint); }

/* ---- testimonial slot ---- */

.quoteframe {
  border: 1px dashed var(--ink-2); padding: 26px 30px; margin-top: 26px;
  font-style: italic; color: var(--ink-2); position: relative;
  background: var(--paper-2);
}
.quoteframe .qk {
  position: absolute; top: -11px; left: 22px; background: var(--paper);
  padding: 0 10px; font-family: var(--mono); font-size: 10.5px;
  letter-spacing: .1em; color: var(--faint); font-style: normal;
  text-transform: uppercase;
}
.quoteframe p { font-size: 16.5px; }
.quoteframe .whois {
  font-family: var(--mono); font-size: 12px; font-style: normal;
  color: var(--faint); margin-top: 10px;
}

/* ---- footer: the title block ---- */

.titleblock {
  margin-top: 72px; border: 2px solid var(--ink);
  font-family: var(--mono); font-size: 11.5px;
  display: grid; grid-template-columns: 2.2fr 1fr 1fr 1fr;
}
.titleblock > div {
  border-right: 1px solid var(--ink); padding: 10px 14px;
}
.titleblock > div:last-child { border-right: 0; }
.titleblock .k { font-size: 9.5px; letter-spacing: .1em; color: var(--faint); text-transform: uppercase; }
.titleblock .v { font-weight: 600; margin-top: 3px; }
.titleblock .v a { color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--rule); }

.sheet-foot {
  font-family: var(--mono); font-size: 10.5px; color: var(--faint);
  letter-spacing: .06em; text-align: center; padding: 18px 0 26px;
}

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

@media (max-width: 880px) {
  .sheet { margin: 12px; padding: 0 20px; }
  .nodes { grid-template-columns: 1fr; }
  .whos { grid-template-columns: 1fr; }
  .figure { grid-template-columns: 1fr; }
  .figure .imgbox { border-right: 0; border-bottom: 1px solid var(--ink); }
  .chain { flex-direction: column; }
  .chain .st + .st { margin-left: 0; margin-top: 18px; }
  .chain .st + .st::before { left: 20px; top: -19px; width: 1px; height: 18px; }
  .chain .st + .st::after { left: 16px; top: -20px; transform: rotate(90deg); }
  .specstrip { flex-wrap: wrap; }
  .specstrip div { flex: 1 1 45%; border-bottom: 1px solid var(--ink); }
  .titleblock { grid-template-columns: 1fr 1fr; }
  .topbar nav { display: none; }
  .stamp { position: static; display: inline-block; margin-top: 18px; transform: rotate(-2deg); }
}

/* ---- ship-list (inside quoteframe substance box) ---- */

.ship-list { list-style: none; font-style: normal; }
.ship-list li {
  font-size: 15px; color: var(--ink); padding-left: 20px;
  position: relative; margin-bottom: 8px;
}
.ship-list li::before {
  content: "▸"; position: absolute; left: 0; top: 1px;
  font-family: var(--mono); font-size: 12px; color: var(--pencil);
}