/* ============================================================
   Air-Systems Engineering, Inc. — asemech.net
   Palette drawn from ASE letterhead: drawing ink + deep ASE red.
   Motif: mechanical-drawing title blocks (mono labels, hairlines,
   red index tabs) — the documents this audience reads all day.
   ============================================================ */

:root {
  --ink: #16181d;          /* drawing ink */
  --ink-soft: #33373f;
  --steel: #5b6270;        /* secondary text */
  --paper: #f6f5f2;        /* spec-sheet paper */
  --white: #ffffff;
  --line: #d9d7d1;         /* hairline rules */
  --ase-red: #8e1b23;      /* letterhead maroon */
  --ase-red-dark: #6e141b;

  --font-display: "Barlow Condensed", "Arial Narrow", sans-serif;
  --font-body: "Public Sans", "Segoe UI", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "Consolas", monospace;

  --max: 1120px;
}

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

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: var(--ase-red); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--ase-red);
  outline-offset: 3px;
}

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ---------- type ---------- */
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: 0.005em;
  text-wrap: balance;
}
h1 { font-size: clamp(2.5rem, 6vw, 4.25rem); }
h2 { font-size: clamp(1.85rem, 3.6vw, 2.6rem); }
h3 { font-size: 1.35rem; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ase-red);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "";
  width: 26px; height: 2px;
  background: var(--ase-red);
}
.eyebrow--plain::before { display: none; }

.lede { font-size: 1.2rem; color: var(--ink-soft); max-width: 46em; }
.muted { color: var(--steel); }

/* ---------- header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 72px; gap: 20px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { height: 40px; width: auto; }

.nav { display: flex; gap: 4px; align-items: center; }
.nav a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding: 10px 13px;
  border-bottom: 2px solid transparent;
}
.nav a:hover { color: var(--ase-red); text-decoration: none; }
.nav a[aria-current="page"] {
  color: var(--ase-red);
  border-bottom-color: var(--ase-red);
}
.nav .nav-cta {
  color: #fff; background: var(--ase-red);
  border-bottom: none; margin-left: 10px;
}
.nav .nav-cta:hover { background: var(--ase-red-dark); color: #fff; }

.nav-toggle { display: none; }

@media (max-width: 860px) {
  .nav-toggle {
    display: block; background: none; border: 1px solid var(--line);
    font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.08em;
    text-transform: uppercase; padding: 9px 14px; cursor: pointer; color: var(--ink);
  }
  .nav {
    display: none;
    position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; align-items: stretch;
    background: #fff; border-bottom: 1px solid var(--line);
    padding: 8px 16px 16px;
  }
  .nav.open { display: flex; }
  .nav a { border-bottom: 1px solid var(--line); padding: 14px 6px; }
  .nav .nav-cta { margin: 12px 0 0; text-align: center; }
}

/* ---------- hero ---------- */
.hero {
  position: relative; color: #fff;
  background: var(--ink);
  overflow: hidden;
}
.hero img.hero-bg {
  position: absolute; inset: 0;
  width: 100%; height: 100%; object-fit: cover;
  opacity: 0.5;
}
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(22,24,29,0.25) 0%, rgba(22,24,29,0.75) 100%);
}
.hero .wrap {
  position: relative; z-index: 2;
  padding-top: clamp(80px, 12vw, 150px);
  padding-bottom: clamp(70px, 10vw, 120px);
}
.hero .eyebrow { color: #f0c9cc; }
.hero .eyebrow::before { background: #f0c9cc; }
.hero h1 { max-width: 15em; color: #fff; }
.hero p {
  margin-top: 20px; max-width: 38em;
  font-size: 1.15rem; color: #e4e3df;
}
.hero-actions { margin-top: 34px; display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem; letter-spacing: 0.1em; text-transform: uppercase;
  padding: 14px 26px;
  background: var(--ase-red); color: #fff;
  border: 1px solid var(--ase-red);
}
.btn:hover { background: var(--ase-red-dark); border-color: var(--ase-red-dark); text-decoration: none; }
.btn--ghost { background: transparent; border-color: rgba(255,255,255,0.55); color: #fff; }
.btn--ghost:hover { background: rgba(255,255,255,0.12); border-color: #fff; }
.btn--ink { background: transparent; border-color: var(--ink); color: var(--ink); }
.btn--ink:hover { background: var(--ink); color: #fff; }

/* ---------- sections ---------- */
.section { padding: clamp(60px, 8vw, 100px) 0; }
.section--paper { background: var(--paper); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { margin-bottom: 40px; max-width: 46em; }
.section-head p { margin-top: 14px; color: var(--ink-soft); }

/* ---------- card grids ---------- */
.grid { display: grid; gap: 28px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 900px) { .grid--3 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .grid--3, .grid--2 { grid-template-columns: 1fr; } }

/* capability tiles */
.cap {
  border: 1px solid var(--line);
  background: #fff;
  padding: 26px 24px 28px;
  position: relative;
}
.cap::before {
  content: "";
  position: absolute; top: -1px; left: -1px;
  width: 34px; height: 5px;
  background: var(--ase-red);
}
.cap h3 { margin-bottom: 10px; }
.cap p { font-size: 0.98rem; color: var(--ink-soft); }
.cap .cap-tag {
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--steel);
  display: block; margin-bottom: 12px;
}

/* project cards */
.pcard {
  border: 1px solid var(--line); background: #fff;
  display: flex; flex-direction: column;
  color: var(--ink);
  transition: border-color 120ms ease, box-shadow 120ms ease;
}
.pcard:hover {
  text-decoration: none;
  border-color: var(--ase-red);
  box-shadow: 0 4px 18px rgba(22,24,29,0.08);
}
.pcard-img { aspect-ratio: 3 / 2; overflow: hidden; background: var(--paper); }
.pcard-img img { width: 100%; height: 100%; object-fit: cover; }
.pcard-body { padding: 20px 22px 24px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.pcard-meta {
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--ase-red);
}
.pcard h3 { font-size: 1.3rem; }
.pcard p { font-size: 0.95rem; color: var(--ink-soft); }
.pcard .pcard-more {
  margin-top: auto; padding-top: 12px;
  font-family: var(--font-mono); font-size: 0.72rem;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--ase-red);
}

/* ---------- title block (signature element) ---------- */
.titleblock {
  border: 2px solid var(--ink);
  background: #fff;
  position: relative;
  margin: 34px 0 44px;
}
.titleblock::before {
  content: "";
  position: absolute; top: -2px; right: -2px;
  width: 64px; height: 8px;
  background: var(--ase-red);
}
.titleblock table { width: 100%; border-collapse: collapse; }
.titleblock th, .titleblock td {
  text-align: left; vertical-align: top;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  font-size: 0.97rem;
}
.titleblock tr:last-child th, .titleblock tr:last-child td { border-bottom: none; }
.titleblock th {
  width: 190px;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.7rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--steel);
  border-right: 1px solid var(--line);
  background: var(--paper);
  white-space: nowrap;
}
@media (max-width: 560px) {
  .titleblock th { width: 120px; white-space: normal; }
}

/* ---------- project detail ---------- */
.proj-hero { padding: clamp(48px, 6vw, 76px) 0 0; }
.proj-hero .back {
  font-family: var(--font-mono); font-size: 0.72rem;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--steel); display: inline-block; margin-bottom: 26px;
}
.proj-hero .back:hover { color: var(--ase-red); }

.proj-body { max-width: 46em; }
.proj-body p + p { margin-top: 16px; }
.proj-body h2 { margin: 40px 0 14px; font-size: 1.55rem; }
.proj-body ul { margin: 14px 0 14px 22px; }
.proj-body li { margin-bottom: 8px; }

.photo-grid {
  display: grid; gap: 14px;
  grid-template-columns: repeat(2, 1fr);
  margin: 40px 0;
}
.photo-grid figure.wide { grid-column: 1 / -1; }
@media (max-width: 640px) { .photo-grid { grid-template-columns: 1fr; } }
.photo-grid figure { margin: 0; }
.photo-grid img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4 / 3; }
.photo-grid figcaption {
  font-family: var(--font-mono); font-size: 0.7rem;
  letter-spacing: 0.06em; color: var(--steel);
  padding-top: 8px;
}

/* prev/next */
.proj-nav {
  display: flex; justify-content: space-between; gap: 20px;
  border-top: 1px solid var(--line);
  margin-top: 56px; padding-top: 26px;
}
.proj-nav a { font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; }

/* ---------- relationships band ---------- */
.rel-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border: 1px solid var(--line); background: #fff; }
@media (max-width: 900px) { .rel-list { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .rel-list { grid-template-columns: 1fr; } }
.rel {
  padding: 22px 24px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.rel strong { display: block; font-family: var(--font-display); font-size: 1.15rem; font-weight: 600; }
.rel span { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ase-red); }

/* ---------- stats strip ---------- */
.stats { display: flex; flex-wrap: wrap; gap: 0; border: 1px solid var(--line); background: #fff; }
.stat { flex: 1 1 180px; padding: 26px 24px; border-right: 1px solid var(--line); }
.stat:last-child { border-right: none; }
.stat b { display: block; font-family: var(--font-display); font-weight: 700; font-size: 2.3rem; line-height: 1; color: var(--ink); }
.stat span { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--steel); }
@media (max-width: 700px) { .stat { border-right: none; border-bottom: 1px solid var(--line); } .stat:last-child { border-bottom: none; } }

/* ---------- about ---------- */
.principles { border-left: 3px solid var(--ase-red); padding: 8px 0 8px 24px; margin: 26px 0; }
.principles p { font-size: 1.15rem; font-family: var(--font-display); font-weight: 500; }

.bio { border: 1px solid var(--line); padding: 26px 26px 28px; background: #fff; }
.bio h3 { margin-bottom: 2px; }
.bio .role { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ase-red); display: block; margin-bottom: 14px; }
.bio p { font-size: 0.97rem; color: var(--ink-soft); }
.bio ul { margin: 12px 0 0 20px; font-size: 0.92rem; color: var(--ink-soft); }
.bio li { margin-bottom: 5px; }

/* ---------- contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
@media (max-width: 800px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-block { border: 1px solid var(--line); background: #fff; }
.contact-block dl { margin: 0; }
.contact-block .row { display: grid; grid-template-columns: 150px 1fr; border-bottom: 1px solid var(--line); }
.contact-block .row:last-child { border-bottom: none; }
.contact-block dt {
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--steel);
  background: var(--paper); border-right: 1px solid var(--line);
  padding: 16px 18px;
}
.contact-block dd { padding: 14px 18px; font-size: 1.02rem; }
@media (max-width: 480px) { .contact-block .row { grid-template-columns: 110px 1fr; } }

/* ---------- CTA band ---------- */
.cta-band { background: var(--ink); color: #fff; }
.cta-band .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 30px; padding-top: 56px; padding-bottom: 56px; flex-wrap: wrap;
}
.cta-band h2 { color: #fff; max-width: 18em; }
.cta-band p { color: #c9c8c4; margin-top: 8px; max-width: 34em; }

/* ---------- footer ---------- */
.site-footer { background: #101216; color: #b9bcc2; font-size: 0.92rem; }
.site-footer .wrap { padding-top: 54px; padding-bottom: 40px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr; gap: 28px; } }
.site-footer img { height: 34px; width: auto; margin-bottom: 16px; }
.site-footer h4 {
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: #7d828c; margin-bottom: 14px;
}
.site-footer a { color: #e2e3e6; }
.site-footer ul { list-style: none; }
.site-footer li { margin-bottom: 9px; }
.footer-bottom {
  border-top: 1px solid #262a31;
  margin-top: 44px; padding-top: 22px;
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.06em; color: #7d828c;
}

/* utility */
.mt-40 { margin-top: 40px; }
.center { text-align: center; }