/* ETG Media — studio site
   Ground: engineering paper. Ink: navy. Key: three sector inks. */

:root {
  --paper:      #e7ecf0;
  --paper-lift: #f2f5f7;
  --ink:        #132430;
  --ink-soft:   #4b5f6d;
  --ink-faint:  #8a9aa6;
  --rule:       #c5d0d9;
  --rule-fine:  #d7dfe5;

  --health:     #26685c;
  --social:     #8a4257;
  --media:      #2f4a8f;

  --gutter: clamp(1.25rem, 5vw, 4.5rem);
  --max: 1240px;

  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans: "Archivo", "Helvetica Neue", Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(1rem, 0.95rem + 0.2vw, 1.125rem);
  line-height: 1.65;
  font-synthesis-weight: none;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; }

h1, h2, h3, .sans {
  font-family: var(--sans);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.06;
  margin: 0;
}

p { margin: 0 0 1.1em; max-width: 62ch; }
p:last-child { margin-bottom: 0; }

.shell { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }

.skip {
  position: absolute; left: -9999px;
  background: var(--ink); color: var(--paper);
  padding: 0.6rem 1rem; font-family: var(--sans); font-size: 0.9rem;
}
.skip:focus { left: 1rem; top: 1rem; z-index: 50; }

:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}

/* ── masthead ─────────────────────────────────────────── */

.masthead {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1.5rem; flex-wrap: wrap;
  padding-top: 1.9rem; padding-bottom: 1.9rem;
  border-bottom: 1px solid var(--rule);
}

.wordmark {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1.0625rem;
  letter-spacing: 0.06em;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}
.wordmark .mark {
  width: 1.35em;
  height: 1.35em;
  flex: none;
  color: var(--ink);
}
.wordmark-text span { color: var(--ink-faint); font-weight: 500; letter-spacing: 0.02em; }

.masthead nav {
  display: flex; gap: clamp(1rem, 2.5vw, 2.25rem); flex-wrap: wrap;
  font-family: var(--sans); font-size: 0.9375rem; font-weight: 500;
  letter-spacing: 0;
}
.masthead nav a {
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  color: var(--ink-soft);
}
.masthead nav a:hover { color: var(--ink); border-bottom-color: var(--ink); }

/* ── hero ─────────────────────────────────────────────── */

.hero {
  position: relative;
  padding-top: clamp(3rem, 8vw, 7rem);
  padding-bottom: clamp(3rem, 6vw, 5.5rem);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, var(--rule-fine) 1px, transparent 1px),
    linear-gradient(to bottom, var(--rule-fine) 1px, transparent 1px);
  background-size: 32px 32px;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,.55), transparent 78%);
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.55), transparent 78%);
  pointer-events: none;
}
.hero > * { position: relative; }

.hero h1 {
  font-size: clamp(2.1rem, 1.1rem + 3.4vw, 3.9rem);
  max-width: 19ch;
  text-wrap: balance;
}

/* the sector key: headline runs into it */
.key {
  list-style: none;
  margin: clamp(1.6rem, 3vw, 2.4rem) 0 0;
  padding: 0;
  border-top: 1px solid var(--rule);
}
.key li {
  display: flex; align-items: center; gap: clamp(0.85rem, 2vw, 1.4rem);
  padding: clamp(0.65rem, 1.4vw, 1rem) 0;
  border-bottom: 1px solid var(--rule);
}
.key .swatch {
  flex: none;
  width: clamp(0.9rem, 2.4vw, 1.5rem);
  height: clamp(0.9rem, 2.4vw, 1.5rem);
  background: var(--tint);
}
.key .name {
  font-family: var(--sans); font-weight: 600;
  letter-spacing: -0.02em;
  font-size: clamp(1.65rem, 0.9rem + 2.7vw, 3.05rem);
  line-height: 1;
  color: var(--tint);
}
.key .note {
  margin-left: auto; text-align: right;
  font-family: var(--sans); font-weight: 400;
  font-size: 0.875rem; line-height: 1.35;
  color: var(--ink-soft);
  max-width: 22ch;
}

.hero-foot {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  margin-top: clamp(2rem, 4vw, 3rem);
  align-items: start;
}
.hero-foot p { font-size: 1.0625rem; }

.ledger {
  margin: 0;
  font-family: var(--sans);
  font-size: 0.875rem;
  line-height: 1.5;
}
.ledger div {
  display: flex; justify-content: space-between; gap: 1.5rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--rule-fine);
}
.ledger div:first-child { border-top: 1px solid var(--rule-fine); }
.ledger dt { color: var(--ink-faint); font-weight: 400; }
.ledger dd { margin: 0; font-weight: 500; text-align: right; }

/* ── generic section ──────────────────────────────────── */

.band { padding: clamp(3.5rem, 7vw, 6.5rem) 0; border-top: 1px solid var(--rule); }

.band > .shell > h2 {
  font-size: clamp(1.5rem, 1.1rem + 1.3vw, 2.15rem);
  max-width: 24ch;
  margin-bottom: 0.5rem;
  text-wrap: balance;
}
.lede {
  color: var(--ink-soft);
  max-width: 58ch;
  margin-bottom: clamp(2rem, 4vw, 3.25rem);
}

/* two arms of the business */
.arms {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
}
.arms > div {
  padding: 0 clamp(1.5rem, 3vw, 3.25rem);
  border-left: 1px solid var(--rule);
}
.arms > div:first-child { padding-left: 0; border-left: 0; }
.arms > div:last-child { padding-right: 0; }
.arms h3 {
  font-size: clamp(1.15rem, 1rem + 0.6vw, 1.45rem);
  margin-bottom: 0.85rem;
}
.arms p { font-size: 1.0625rem; color: var(--ink-soft); }

/* sectors */
.sectors { display: grid; gap: clamp(1.75rem, 3.5vw, 2.75rem); }
.sector {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.6fr);
  gap: clamp(1.25rem, 3vw, 3rem);
  padding-left: clamp(1rem, 2vw, 1.75rem);
  border-left: 3px solid var(--tint);
}
.sector h3 {
  font-size: clamp(1.25rem, 1rem + 0.8vw, 1.6rem);
  color: var(--tint);
}
.sector p { font-size: 1.0625rem; }
.built {
  margin: 1.1rem 0 0;
  padding: 0;
  list-style: none;
  display: flex; flex-wrap: wrap; gap: 0.4rem 0.55rem;
  font-family: var(--sans); font-size: 0.8125rem; font-weight: 500;
  color: var(--ink-soft);
}
.built li {
  border: 1px solid var(--rule);
  padding: 0.25rem 0.6rem;
  background: var(--paper-lift);
}

/* process — a real sequence, so it is numbered */
.process {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: clamp(1rem, 2vw, 1.75rem);
  counter-reset: step;
}
.process > div { counter-increment: step; border-top: 1px solid var(--ink); padding-top: 0.85rem; }
.process > div::before {
  content: counter(step, decimal-leading-zero);
  display: block;
  font-family: var(--sans); font-size: 0.75rem; font-weight: 500;
  color: var(--ink-faint);
  margin-bottom: 0.5rem;
}
.process h3 { font-size: 1rem; margin-bottom: 0.4rem; }
.process p { font-size: 0.9375rem; color: var(--ink-soft); }

/* ── inverted band: standards ─────────────────────────── */

.dark {
  background: var(--ink);
  color: var(--paper);
  border-top: 0;
}
.dark h2 { color: var(--paper); }
.dark .lede { color: #a9bcc9; }
.dark .standards { margin: 0; }
.dark .standards > div {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.8fr);
  gap: clamp(0.5rem, 3vw, 3rem);
  padding: clamp(1.1rem, 2vw, 1.5rem) 0;
  border-top: 1px solid rgba(231, 236, 240, 0.22);
}
.dark .standards > div:last-child { border-bottom: 1px solid rgba(231, 236, 240, 0.22); }
.dark dt {
  font-family: var(--sans); font-weight: 600; font-size: 1.0625rem;
  letter-spacing: -0.01em;
}
.dark dd { margin: 0; color: #bccdd8; font-size: 1rem; }
.dark dd p { max-width: 66ch; }

/* ── studio ───────────────────────────────────────────── */

.studio {
  display: grid;
  grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: start;
}
.studio figure { margin: 0; }
.studio figure img { width: 100%; filter: grayscale(1) contrast(1.05); }
.studio figcaption {
  font-family: var(--sans); font-size: 0.8125rem; color: var(--ink-faint);
  margin-top: 0.7rem; line-height: 1.45;
}
.studio .sig { width: 150px; margin-top: 1.5rem; opacity: 0.72; filter: invert(1); }

/* ── contact ──────────────────────────────────────────── */

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 4rem);
  align-items: end;
}
.mail {
  font-family: var(--sans);
  font-weight: 600;
  letter-spacing: -0.025em;
  font-size: clamp(1.35rem, 0.9rem + 1.9vw, 2.4rem);
  text-decoration: none;
  border-bottom: 2px solid var(--rule);
  padding-bottom: 0.15em;
  display: inline-block;
  transition: border-color 0.2s ease;
}
.mail:hover { border-bottom-color: var(--ink); }
.contact .aside {
  font-size: 0.9375rem; color: var(--ink-soft);
  border-top: 1px solid var(--rule); padding-top: 1rem;
}

/* ── footer ───────────────────────────────────────────── */

.footer {
  border-top: 1px solid var(--rule);
  padding: 2.25rem 0 3rem;
  font-family: var(--sans);
  font-size: 0.8125rem;
  color: var(--ink-soft);
}
.footer .row {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) auto;
  gap: 1.5rem; align-items: baseline;
}
.footer .row > :last-child { text-align: right; color: var(--ink-faint); }
.footer a { text-decoration: none; border-bottom: 1px solid var(--rule); }
.footer a:hover { border-bottom-color: var(--ink); color: var(--ink); }
.footer .fine { margin-top: 1.25rem; max-width: 70ch; color: var(--ink-faint); line-height: 1.5; }

/* ── the one motion moment: key rules draw in on load ─── */

@media (prefers-reduced-motion: no-preference) {
  .key li {
    opacity: 0;
    transform: translateY(6px);
    animation: settle 0.7s cubic-bezier(0.2, 0.7, 0.3, 1) forwards;
  }
  .key li:nth-child(1) { animation-delay: 0.1s; }
  .key li:nth-child(2) { animation-delay: 0.22s; }
  .key li:nth-child(3) { animation-delay: 0.34s; }
  @keyframes settle { to { opacity: 1; transform: none; } }
}

/* ── responsive ───────────────────────────────────────── */

@media (max-width: 900px) {
  .hero-foot { grid-template-columns: 1fr; }
  .arms { grid-template-columns: 1fr; gap: 1.75rem; }
  .arms > div {
    padding: 1.5rem 0 0; border-left: 0; border-top: 1px solid var(--rule);
  }
  .sector { grid-template-columns: 1fr; gap: 0.75rem; }
  .process { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dark .standards > div { grid-template-columns: 1fr; gap: 0.4rem; }
  .studio { grid-template-columns: 1fr; }
  .studio figure { max-width: 220px; }
  .contact { grid-template-columns: 1fr; align-items: start; }
}

@media (max-width: 560px) {
  .key li { flex-wrap: wrap; row-gap: 0.35rem; }
  .key .note { margin-left: 0; text-align: left; max-width: none; width: 100%; }
  .process { grid-template-columns: 1fr; }
  .masthead { padding-bottom: 1.25rem; }
  .masthead nav { gap: 1.1rem; }
  .footer .row { grid-template-columns: 1fr; gap: 0.4rem; }
  .footer .row > :last-child { text-align: left; }
}