/* ============================================================
   V1 — BLUEPRINT
   The site as an engineer's drawing of itself.
   Paper, grid, ink, dimension lines, title block.
   ============================================================ */

@font-face { font-family: "Space Grotesk"; src: url("fonts/SpaceGrotesk-400.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Space Grotesk"; src: url("fonts/SpaceGrotesk-500.woff2") format("woff2"); font-weight: 500; font-display: swap; }
@font-face { font-family: "Space Grotesk"; src: url("fonts/SpaceGrotesk-700.woff2") format("woff2"); font-weight: 700; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url("fonts/IBMPlexMono-400.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url("fonts/IBMPlexMono-500.woff2") format("woff2"); font-weight: 500; font-display: swap; }

:root {
  --paper: #FAFBF9;
  --ink: #10231A;
  --ink-soft: #3D5347;
  --green: #00713F;        /* AA on paper for bold/large */
  --green-deep: #00542F;   /* AA on paper at any size */
  --line: rgba(0, 84, 47, 0.55);
  --grid-minor: rgba(0, 113, 63, 0.09);
  --grid-major: rgba(0, 113, 63, 0.18);
  --red: #B3261E;          /* revision marks — sparingly */
  --sans: "Space Grotesk", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --measure: 62ch;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid-major) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-major) 1px, transparent 1px),
    linear-gradient(var(--grid-minor) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-minor) 1px, transparent 1px);
  background-size: 96px 96px, 96px 96px, 12px 12px, 12px 12px;
}

::selection { background: var(--green); color: var(--paper); }

/* ---------- annotation typography ---------- */
.anno {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green-deep);
}
.anno--dim { font-weight: 400; letter-spacing: 0.08em; }

/* ---------- frame: the sheet border ---------- */
.sheet {
  max-width: 1240px;
  margin: 1.25rem auto;
  border: 1.5px solid var(--ink);
  outline: 1px solid var(--line);
  outline-offset: 4px;
  background: transparent;
}
@media (max-width: 720px) { .sheet { margin: 0.75rem; outline-offset: 3px; } }

/* ---------- title block (header) ---------- */
.titleblock {
  display: grid;
  grid-template-columns: auto 1fr auto;
  border-bottom: 1.5px solid var(--ink);
}
.titleblock > * { padding: 0.9rem 1.25rem; }
.titleblock .tb-brand {
  border-right: 1px solid var(--line);
  display: flex; align-items: center; gap: 0.75rem;
  text-decoration: none; color: var(--ink);
}
.tb-brand .logo180 {
  font-family: var(--mono); font-weight: 500; font-size: 1.15rem;
  border: 1.5px solid var(--ink); padding: 0.15rem 0.45rem;
  color: var(--green-deep);
}
.tb-brand .tb-name { font-weight: 700; letter-spacing: 0.01em; line-height: 1.25; }
.tb-brand .tb-name small { display: block; font-weight: 400; color: var(--ink-soft); font-size: 0.8rem; }
.titleblock nav {
  display: flex; align-items: center; justify-content: flex-end; gap: 1.5rem; flex-wrap: wrap;
}
.titleblock nav a {
  font-family: var(--mono); font-size: 0.78rem; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--ink); text-decoration: none;
  border-bottom: 1px dashed transparent; padding-bottom: 2px;
}
.titleblock nav a:hover, .titleblock nav a:focus-visible { color: var(--green-deep); border-bottom-color: var(--green-deep); }
.titleblock nav a[aria-current="page"] { color: var(--green-deep); border-bottom: 1.5px solid var(--green-deep); }
.titleblock .tb-meta {
  border-left: 1px solid var(--line);
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.08em;
  color: var(--ink-soft); text-transform: uppercase;
  display: grid; align-content: center; gap: 2px; text-align: right;
}
@media (max-width: 900px) {
  .titleblock { grid-template-columns: 1fr; }
  .titleblock .tb-brand { border-right: 0; border-bottom: 1px solid var(--line); }
  .titleblock nav { justify-content: flex-start; padding-top: 0.75rem; padding-bottom: 0.75rem; }
  .titleblock .tb-meta { display: none; }
}
@media (max-width: 480px) {
  .titleblock nav {
    flex-wrap: nowrap; overflow-x: auto; gap: 1.1rem;
    -webkit-overflow-scrolling: touch; scrollbar-width: none;
  }
  .titleblock nav::-webkit-scrollbar { display: none; }
  .titleblock nav a { white-space: nowrap; flex: 0 0 auto; }
}

/* ---------- sections ---------- */
section { padding: 4.5rem 2rem; border-bottom: 1px solid var(--line); position: relative; }
section:last-of-type { border-bottom: 0; }
@media (max-width: 720px) { section { padding: 3rem 1.1rem; } }
.section-tag {
  position: absolute; top: 1rem; left: 2rem;
  display: flex; align-items: center; gap: 0.6rem;
}
@media (max-width: 720px) { .section-tag { left: 1.1rem; } }
.section-tag .tag-circle {
  width: 1.7rem; height: 1.7rem; border: 1.5px solid var(--green-deep); border-radius: 50%;
  display: grid; place-items: center;
  font-family: var(--mono); font-size: 0.75rem; font-weight: 500; color: var(--green-deep);
}
.inner { max-width: 1080px; margin: 0 auto; }

/* ---------- hero ---------- */
.hero { padding-top: 6rem; padding-bottom: 3.5rem; }
.hero .doors { flex-direction: column; align-items: flex-start; gap: 0.7rem; }
.hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 3.5rem; align-items: center; }
.hero-fig { justify-self: center; }
@media (max-width: 940px) { .hero-grid { grid-template-columns: 1fr; } .hero-fig { justify-self: start; max-width: 340px; } }
.hero h1 {
  font-size: clamp(2.4rem, 6.2vw, 4.9rem);
  line-height: 1.04;
  font-weight: 700;
  letter-spacing: -0.02em;
  max-width: 18ch;
}
.hero h1 em { font-style: normal; color: var(--green); }
.hero .sub {
  margin-top: 1.75rem; max-width: 52ch; font-size: 1.15rem; color: var(--ink-soft);
}
.hero-dim { margin-top: 0.9rem; margin-bottom: 2.2rem; max-width: 560px; }

/* dimension line component — the line visibly BREAKS for its text,
   like a real dimension. Flex segments; can never strike through. */
.dim {
  display: flex; align-items: center; gap: 0.8em;
  margin: 1.6rem 0 0.9rem;
}
.dim::before, .dim::after {
  content: ""; flex: 1; height: 1px; background: var(--line);
  border-left: 1px solid var(--line); border-right: 1px solid var(--line);
  padding-top: 4px; margin-top: -4px;
  background-clip: content-box;
}
.dim .dim-label {
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.1em;
  color: var(--green-deep); text-transform: uppercase;
  text-align: center;
}
@media (max-width: 560px) {
  .dim { display: block; }
  .dim::before, .dim::after { display: none; }
  .dim .dim-label { display: block; text-align: left; border-left: 2px solid var(--green-deep); padding-left: 0.6rem; }
}

/* ---------- buttons: schematic ports ---------- */
.doors { display: flex; gap: 0.8rem; flex-wrap: wrap; margin-top: 2.6rem; }
.btn {
  font-family: var(--mono); font-size: 0.76rem; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase;
  text-decoration: none; padding: 0.85rem 1.05rem;
  border: 1.5px solid var(--ink); color: var(--ink);
  position: relative; background: var(--paper);
  transition: background-color 160ms ease, color 160ms ease, box-shadow 160ms ease;
}
.btn .btn-idx { color: var(--green-deep); margin-right: 0.6em; }
.btn:hover, .btn:focus-visible {
  background: var(--ink); color: var(--paper);
  box-shadow: 4px 4px 0 var(--line);
}
.btn:hover .btn-idx, .btn:focus-visible .btn-idx { color: #7FD6A8; }
.btn--solid { background: var(--green-deep); border-color: var(--green-deep); color: #fff; }
.btn--solid .btn-idx { color: #9FE0BC; }
.btn--solid:hover, .btn--solid:focus-visible { background: var(--ink); border-color: var(--ink); }

/* ---------- schematic hover: selection outline ---------- */
.sel:hover, .sel:focus-within {
  outline: 1.5px dashed var(--green); outline-offset: 6px;
}

/* ---------- proof row: bill of materials ---------- */
.bom { width: 100%; border-collapse: collapse; margin-top: 1.5rem; }
.bom caption { text-align: left; padding-bottom: 0.8rem; }
.bom th, .bom td { border: 1px solid var(--line); padding: 0.85rem 1.1rem; text-align: left; vertical-align: top; }
.bom th { font-family: var(--mono); font-size: 0.7rem; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--green-deep); background: rgba(0, 113, 63, 0.045); }
.bom td strong { font-size: 1.35rem; font-weight: 700; display: block; letter-spacing: -0.01em; }
.bom td span { color: var(--ink-soft); font-size: 0.92rem; }

/* ---------- detail callouts: service areas ---------- */
.details-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 0; margin-top: 2rem;
  border: 1px solid var(--line);
}
.detail {
  padding: 1.75rem; border: 1px solid var(--line); position: relative;
  transition: background-color 160ms ease;
}
.detail:hover { background: rgba(0, 113, 63, 0.04); }
.detail .detail-ref {
  display: inline-grid; place-items: center;
  width: 2.1rem; height: 2.1rem; border: 1.5px solid var(--green-deep); border-radius: 50%;
  font-family: var(--mono); font-size: 0.85rem; font-weight: 500; color: var(--green-deep);
  margin-bottom: 1rem;
}
.detail h3 { font-size: 1.12rem; font-weight: 700; margin-bottom: 0.5rem; }
.detail p { color: var(--ink-soft); font-size: 0.95rem; }

/* ---------- placeholder slot: reserved drawing space, one convention, always red ---------- */
.placeholder {
  display: inline-block;
  border: 1.5px dashed var(--red);
  padding: 0.85rem 1.1rem;
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em; line-height: 1.5;
  color: var(--red); text-transform: uppercase;
  background: repeating-linear-gradient(-45deg, transparent, transparent 10px, rgba(179, 38, 30, 0.045) 10px, rgba(179, 38, 30, 0.045) 20px);
}

/* ---------- split sections ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 3.5rem; align-items: start; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; gap: 2rem; } }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); font-weight: 700; letter-spacing: -0.015em; line-height: 1.15; max-width: 24ch; }
.lede { margin-top: 1.1rem; color: var(--ink-soft); max-width: var(--measure); }
.prose p + p { margin-top: 1rem; }
a { color: var(--green-deep); }
a:focus-visible, .btn:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; }

/* ---------- spec cells (proof row) — table semantics without table overflow ---------- */
.specs { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); margin-top: 1.6rem; }
.specs > div { padding: 1.1rem 1.2rem; border-right: 1px solid var(--line); }
.specs > div:last-child { border-right: 0; }
.specs dt {
  font-family: var(--mono); font-size: 0.7rem; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--green-deep);
  padding-bottom: 0.55rem; border-bottom: 1px solid var(--line); margin-bottom: 0.7rem;
}
.specs dd strong { font-size: 1.45rem; font-weight: 700; display: block; letter-spacing: -0.01em; }
.specs dd span { color: var(--ink-soft); font-size: 0.9rem; }
@media (max-width: 720px) {
  .specs { grid-template-columns: 1fr 1fr; }
  .specs > div { border-bottom: 1px solid var(--line); }
  .specs > div:nth-child(even) { border-right: 0; }
  .specs > div:nth-child(n+3) { border-bottom: 0; }
}

/* ---------- reserved portrait frames (team) ---------- */
.frames { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: 0.9rem; margin: 1.8rem 0 0.6rem; }
.frame-slot {
  aspect-ratio: 3 / 4; border: 1.5px dashed var(--line);
  background: repeating-linear-gradient(-45deg, transparent, transparent 9px, rgba(0, 84, 47, 0.05) 9px, rgba(0, 84, 47, 0.05) 18px);
  display: grid; place-items: end start;
}
.frame-slot span { font-family: var(--mono); font-size: 0.68rem; color: var(--green-deep); padding: 0.45rem 0.55rem; }

/* ---------- compact detail index (for-clients services) ---------- */
.index-list { border-top: 1px solid var(--line); margin-top: 2rem; }
.index-row { display: grid; grid-template-columns: 3.2rem 15rem 1fr; gap: 1.2rem; align-items: baseline; padding: 0.95rem 0; border-bottom: 1px solid var(--line); }
.index-row .ref { font-family: var(--mono); font-size: 0.8rem; font-weight: 500; color: var(--green-deep); }
.index-row .ttl { font-weight: 700; }
.index-row .one { color: var(--ink-soft); font-size: 0.93rem; }
@media (max-width: 760px) { .index-row { grid-template-columns: 2.4rem 1fr; } .index-row .one { grid-column: 2; } }

/* ---------- hero leader annotation ---------- */
.leader {
  display: inline-block; font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.1em;
  color: var(--green-deep); text-transform: uppercase; vertical-align: super;
  border-bottom: 1px solid var(--line); padding: 0 0.2em 0.1em; margin-left: 0.35em;
}

/* ---------- reserved (non-alarm) placeholder: grey-green hatched, for low-stakes gaps.
   Red .placeholder is reserved for the two highest-value gaps only (impact numbers, cases). */
.reserved {
  display: inline-block;
  border: 1.5px dashed var(--line);
  padding: 0.85rem 1.1rem;
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em; line-height: 1.5;
  color: var(--green-deep); text-transform: uppercase;
  background: repeating-linear-gradient(-45deg, transparent, transparent 10px, rgba(0, 84, 47, 0.05) 10px, rgba(0, 84, 47, 0.05) 20px);
}
.poche .reserved { color: #8FDBB4; border-color: rgba(143, 219, 180, 0.5); }

/* vertical dimension-chain nodes for the mobile timeline */
.tl-step { position: relative; }
@media (max-width: 640px) {
  .tl-steps { border-left: 1.5px solid var(--green-deep); padding-left: 0; gap: 1.6rem; }
  .tl-step { border-left: 0; padding-left: 1.4rem; }
  .tl-step::before {
    content: ""; position: absolute; left: -6px; top: 0.4rem;
    width: 10px; height: 10px; border-radius: 50%;
    background: var(--paper); border: 1.5px solid var(--green-deep);
  }
}

/* ---------- team parts list ---------- */
.parts { width: 100%; border-collapse: collapse; margin-top: 2rem; }
.parts th, .parts td { border-bottom: 1px solid var(--line); padding: 0.8rem 1rem 0.8rem 0; text-align: left; }
.parts th { font-family: var(--mono); font-size: 0.7rem; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--green-deep); }
.parts td:first-child { font-family: var(--mono); font-size: 0.78rem; color: var(--ink-soft); width: 4.5rem; }
.parts td .p-name { font-weight: 700; }
.parts td a { font-family: var(--mono); font-size: 0.85rem; text-decoration: none; border-bottom: 1px dashed var(--line); }
.parts td a:hover { border-bottom-style: solid; }
@media (max-width: 720px) {
  .parts thead { display: none; }
  .parts tr { display: block; border-bottom: 1px solid var(--line); padding: 0.7rem 0; }
  .parts td { display: block; border: 0; padding: 0.1rem 0; }
}

/* ---------- timeline drawing (for-clients) ---------- */
.timeline { margin-top: 3rem; }
.tl-svg { width: 100%; height: auto; display: block; }
@media (max-width: 640px) {
  /* a squashed horizontal drawing is worse than none; the vertical step
     chain below carries the same information legibly */
  .timeline { display: none; }
}
.tl-steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 1.25rem; margin-top: 2rem; }
.tl-step { border-left: 1.5px solid var(--green-deep); padding-left: 1.1rem; }
.tl-step h3 { font-size: 1.05rem; font-weight: 700; margin: 0.35rem 0; }
.tl-step p { font-size: 0.93rem; color: var(--ink-soft); }

/* ---------- pro bono stamp: actually stamped ---------- */
.stamp {
  display: inline-block; transform: rotate(-4deg);
  border: 4px double var(--green-deep); outline: 1.5px solid var(--green-deep); outline-offset: 3px;
  padding: 0.7rem 1.8rem;
  font-family: var(--mono); font-weight: 700; font-size: clamp(1.5rem, 3.5vw, 2.2rem);
  letter-spacing: 0.24em; text-transform: uppercase; color: var(--green-deep);
  margin: 1.8rem 0 1rem -0.4rem;
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='0.7' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0.82 0.18'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='0.7' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0.82 0.18'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- footer ---------- */
footer { border-top: 1.5px solid var(--ink); padding: 2.5rem 2rem; }
.foot-grid { max-width: 1080px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 2rem; }
@media (max-width: 860px) { .foot-grid { grid-template-columns: 1fr; } }
footer .anno { display: block; margin-bottom: 0.7rem; }
footer p, footer li { font-size: 0.92rem; color: var(--ink-soft); }
footer ul { list-style: none; }
footer li + li { margin-top: 0.35rem; }
footer a { color: var(--ink); text-decoration: none; border-bottom: 1px dashed var(--line); }
footer a:hover { color: var(--green-deep); border-bottom-style: solid; }
.foot-legal {
  max-width: 1080px; margin: 2.2rem auto 0; padding-top: 1.2rem;
  border-top: 1px solid var(--line);
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.06em;
  color: var(--ink-soft); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem;
}

/* ---------- motion: things get DRAWN, nothing fades ----------
   The only moves are stroke-dashoffset line-drawing on SVGs and
   rules drawing in under headings. JS-gated (html.js) so no-JS
   and non-scrolling renderers see everything. */
@media (prefers-reduced-motion: no-preference) {
  html.js .tl-draw { stroke-dasharray: 1600; stroke-dashoffset: 1600; transition: stroke-dashoffset 1400ms ease 200ms; }
  html.js .tl-draw.in { stroke-dashoffset: 0; }
  html.js .rule-draw::after { transform: scaleX(0); transform-origin: left; transition: transform 800ms cubic-bezier(0.22, 1, 0.36, 1) 100ms; }
  html.js .rule-draw.in::after { transform: scaleX(1); }
}
h2.rule-draw { position: relative; padding-bottom: 0.7rem; }
h2.rule-draw::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 5.5rem; height: 2px; background: var(--green-deep);
}

/* ---------- dark poché panel ---------- */
.poche { background: #0C2B1D; color: #E9F2ED; border-bottom: 1.5px solid var(--ink); }
.poche h2 { color: #FFFFFF; }
.poche .lede, .poche p { color: #BCD4C7; }
.poche a { color: #8FDBB4; }
.poche .anno { color: #8FDBB4; }
.poche .placeholder { color: #F2B8B5; border-color: #F2B8B5; background: repeating-linear-gradient(-45deg, transparent, transparent 10px, rgba(242,184,181,0.06) 10px, rgba(242,184,181,0.06) 20px); }

/* ---------- crosshair coordinate readout (JS garnish) ---------- */
#coord {
  position: fixed; bottom: 1.4rem; right: 2.2rem; z-index: 50;
  font-family: var(--mono); font-size: 0.65rem; letter-spacing: 0.08em;
  color: var(--green-deep); background: var(--paper);
  border: 1px solid var(--line); padding: 0.25rem 0.55rem;
  pointer-events: none; opacity: 0;
  transition: opacity 300ms ease;
}
#coord.live { opacity: 0.85; }
@media (max-width: 900px), (prefers-reduced-motion: reduce) { #coord { display: none; } }

/* ---------- skip link ---------- */
.skip {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--ink); color: var(--paper); padding: 0.6rem 1rem;
  font-family: var(--mono); font-size: 0.8rem;
}
.skip:focus { left: 0.5rem; top: 0.5rem; }