/* =========================================================================
   Hazel Street Development Services
   Visual reference: McKinsey & Company. Two colors. Three fonts. Restraint.
   ========================================================================= */

/* -------------------------------------------------------------------------
   1. Tokens
   ------------------------------------------------------------------------- */
:root {
  --ink:        #051C2C;
  --ink-soft:   #1B2B3A;
  --paper:      #FFFFFF;
  --paper-warm: #FAFAF7;
  --rule:       #D5D7DA;
  --rule-dark:  #2A3D4E;
  --mute:       #6B7280;
  --mute-dark:  #8A98A6;
  --hazel:      #A78C5F;

  --serif: "Bodoni Moda", "Times New Roman", Georgia, serif;
  --sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono:  "JetBrains Mono", ui-monospace, "SF Mono", Consolas, monospace;

  --maxw:      1200px;
  --pad-x:     80px;
  --pad-y:     140px;

  --t-fast:    150ms ease-out;
  --t-fade:    600ms ease-out;
}

/* -------------------------------------------------------------------------
   2. Reset / base
   ------------------------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  font-weight: 400;
}

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

a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-fast), color var(--t-fast);
}
a:hover { border-bottom-color: currentColor; }

button { font-family: inherit; cursor: pointer; }

p { margin: 0 0 1.2em; }

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

/* Accessibility: skip link + focus */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 12px 16px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  z-index: 1000;
}
.skip-link:focus { left: 8px; top: 8px; }

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}
.on-ink a:focus-visible,
.on-ink button:focus-visible,
.on-ink input:focus-visible,
.on-ink textarea:focus-visible {
  outline-color: var(--paper);
}

/* -------------------------------------------------------------------------
   3. Typography
   ------------------------------------------------------------------------- */
.serif { font-family: var(--serif); font-weight: 700; }
.mono  { font-family: var(--mono); font-weight: 400; }

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 700;
  margin: 0 0 0.4em;
  letter-spacing: -0.02em;
}

.h-hero {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 88px;
  line-height: 0.95;
  letter-spacing: -0.025em;
  margin: 0;
}

.h-section {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 56px;
  line-height: 1.1;
  letter-spacing: 0;
  margin: 0 0 0.6em;
  font-variant-ligatures: none;
  font-feature-settings: "liga" 0, "clig" 0, "dlig" 0, "hlig" 0;
}

.h-sub {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 28px;
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin: 0 0 0.5em;
}

.eyebrow {
  display: inline-block;
  font-family: var(--mono);
  font-weight: 400;
  font-size: 12px;
  line-height: 1.4;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mute);
  margin: 0 0 32px;
}
.on-ink .eyebrow { color: var(--mute-dark); }

.lede {
  font-size: 22px;
  line-height: 1.45;
  font-weight: 400;
  max-width: 720px;
  margin: 0 0 1.2em;
}

.caption,
.small {
  font-size: 14px;
  line-height: 1.5;
  color: var(--mute);
}
.on-ink .caption,
.on-ink .small { color: var(--mute-dark); }

/* -------------------------------------------------------------------------
   4. Layout primitives
   ------------------------------------------------------------------------- */
.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

.section {
  padding: var(--pad-y) 0;
  position: relative;
}
.section + .section { border-top: 1px solid var(--rule); }

.on-paper { background: var(--paper); color: var(--ink); }
.on-ink   { background: var(--ink);   color: var(--paper); }
.on-ink + .on-ink,
.on-paper + .on-paper { border-top: 1px solid var(--rule); }
.on-ink + .on-paper,
.on-paper + .on-ink { border-top: none; }
.on-ink + .on-ink { border-top-color: var(--rule-dark); }

/* Grid helpers */
.grid {
  display: grid;
  gap: 64px;
}
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 32px; }

.col-7 { grid-column: span 7; }
.col-5 { grid-column: span 5; }
.col-8 { grid-column: span 8; }
.col-4 { grid-column: span 4; }
.col-6 { grid-column: span 6; }

/* Hairline rule */
.rule {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 0;
}
.on-ink .rule { border-top-color: var(--rule-dark); }

/* -------------------------------------------------------------------------
   5. Navigation
   ------------------------------------------------------------------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--ink);
  color: var(--paper);
  border-bottom: 1px solid var(--rule-dark);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 20px var(--pad-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.nav-brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  color: var(--paper);
  border-bottom: none;
  white-space: nowrap;
  flex-shrink: 1;
  min-width: 0;
}
.nav-brand:hover { border-bottom: none; }
.nav-brand .b-serif {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.02em;
}
.nav-brand .b-sep {
  font-family: var(--sans);
  color: var(--mute-dark);
  font-size: 14px;
}
.nav-brand .b-sans {
  font-family: var(--sans);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--paper);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a:not(.btn) {
  font-family: var(--sans);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.01em;
  color: var(--paper);
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--rule-dark);
  color: var(--paper);
  padding: 8px 14px;
  font-family: var(--sans);
  font-weight: 400;
  font-size: 14px;
  letter-spacing: 0;
  text-transform: none;
  border-radius: 4px;
}

/* -------------------------------------------------------------------------
   6. Buttons
   ------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--sans);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.02em;
  padding: 12px 22px;
  border-radius: 4px;
  border: 1px solid currentColor;
  transition: background var(--t-fast), color var(--t-fast);
  cursor: pointer;
  text-decoration: none;
  line-height: 1;
}
.btn:hover { border-bottom: 1px solid currentColor; }

.btn-on-ink {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--paper);
}
.btn-on-ink:hover {
  background: transparent;
  color: var(--paper);
}

.btn-on-paper {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.btn-on-paper:hover {
  background: transparent;
  color: var(--ink);
}

.arrow { font-family: var(--sans); display: inline-block; transition: transform var(--t-fast); }
.btn:hover .arrow { transform: translateX(3px); }

/* -------------------------------------------------------------------------
   7. Hero
   ------------------------------------------------------------------------- */
.hero {
  padding: 120px 0 140px;
  background: var(--ink);
  color: var(--paper);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.hero-video {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  height: 100%;
  min-width: 100%;
  min-height: 100%;
  object-fit: cover;
  object-position: center 70%;
  z-index: -2;
  opacity: 0.55;
  pointer-events: none;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  /* Lighter navy cast for video visibility. */
  background:
    linear-gradient(180deg, rgba(5,28,44,0.28) 0%, rgba(5,28,44,0.48) 60%, rgba(5,28,44,0.64) 100%),
    rgba(5,28,44,0.28);
  mix-blend-mode: normal;
}
.hero .wrap { position: relative; z-index: 1; }

@media (prefers-reduced-motion: reduce) {
  .hero-video { display: none; }
}
.hero .eyebrow { margin-bottom: 56px; }
.hero h1 { max-width: 16ch; }
.hero .lede {
  margin-top: 40px;
  color: rgba(255,255,255,0.86);
  max-width: 640px;
}
.hero-actions {
  margin-top: 48px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px 40px;
}
.hero-emails {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--mute-dark);
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-emails a { color: var(--paper); }
.hero-emails .dot { color: var(--mute-dark); }

/* Three-sentence stacked headline (Problem section) */
.h-section .line { display: block; }

.problem-grid { align-items: start; }
.problem-grid .h-section {
  font-size: 30px;
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin-bottom: 0;
}
.problem-body { padding-top: 4px; }
.problem-body .lede {
  font-size: 17px;
  line-height: 1.6;
}
@media (max-width: 900px) {
  .problem-grid .h-section { font-size: 24px; }
  .problem-body { padding-top: 0; }
  .problem-body .lede { font-size: 15px; }
}

/* -------------------------------------------------------------------------
   8. Section header pattern
   ------------------------------------------------------------------------- */
.section-head {
  margin-bottom: 80px;
  max-width: 880px;
}
.section-head .lede { margin-top: 24px; }

/* -------------------------------------------------------------------------
   8b. Selected Coverage — horizontal carousel, 3 panes visible
   ------------------------------------------------------------------------- */
.articles { padding: 72px 0 44px; }

.articles-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin: 0 0 12px;
}
.articles-eyebrow {
  display: block;
  margin: 0;
  font-family: var(--sans);
  font-weight: 500;
  font-size: 34px;
  letter-spacing: -0.005em;
  text-transform: none;
  color: var(--ink);
}

.articles-nav {
  display: flex;
  gap: 8px;
}
.articles-arrow {
  width: 44px;
  height: 44px;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 0;
  padding: 0;
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast), opacity var(--t-fast);
}
.articles-arrow:hover {
  background: var(--ink);
  color: var(--paper);
}
.articles-arrow[disabled] {
  opacity: 0.25;
  cursor: default;
  pointer-events: none;
}

.articles-carousel {
  position: relative;
}
.articles-track {
  display: flex;
  gap: 32px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding-bottom: 4px;
}
.articles-track::-webkit-scrollbar { display: none; }

/* Each card is its own image with a layered cast. */
.article-card {
  flex: 0 0 calc((100% - 64px) / 3);
  scroll-snap-align: start;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  aspect-ratio: 4 / 5;
  color: var(--paper);
  border: 1px solid var(--ink);
  text-decoration: none;
  padding: 26px 24px 24px;
  background: var(--ink);
  transition: border-color var(--t-fast);
}
.article-card:hover { border-bottom: 1px solid var(--ink); }

.article-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  z-index: 0;
  transition: opacity 250ms ease;
}
/* Navy cast by default; hazel on hover (fully covers the image). */
.article-cast {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: rgba(5, 28, 44, 0.78);
  pointer-events: none;
  transition: background-color 250ms ease;
}
.article-card:hover .article-cast { background: var(--hazel); }
.article-card:hover .article-img { opacity: 0; }

/* Card content sits above the image + cast. */
.article-meta,
.article-title,
.article-read {
  position: relative;
  z-index: 2;
  color: var(--paper);
  transition: color 250ms ease;
}
.article-card:hover .article-meta,
.article-card:hover .article-title,
.article-card:hover .article-read {
  color: var(--ink);
}

.article-meta {
  font-family: var(--sans);
  font-weight: 500;
  font-size: 12px;
  line-height: 1.4;
  letter-spacing: 0.02em;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
  align-self: flex-start;
}
.article-pub { font-weight: 500; }
.article-dot { opacity: 0.7; }
.article-date { font-weight: 400; opacity: 0.85; }

.article-title {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.3;
  letter-spacing: -0.005em;
  margin: 0;
  padding: 0 8px;
  max-width: none;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.article-read {
  align-self: flex-start;
  font-family: var(--sans);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.02em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}
.article-read .arrow { transition: transform var(--t-fast); }
.article-card:hover .article-read .arrow { transform: translateX(3px); }
.article-card:hover .article-title {
  background-size: 100% 1px;
}

@media (max-width: 900px) {
  .articles { padding: 48px 0 28px; }
  .articles-header { margin-bottom: 8px; }
  /* Mobile peek: extend the track past the right edge so the
     next card is visible by a sliver. */
  .articles-carousel { margin-right: calc(var(--pad-x) * -1); }
  .articles-track { padding-right: var(--pad-x); }
  .article-card { flex-basis: 80%; padding: 22px 20px 20px; }
  .article-title { font-size: 18px; }
  .article-meta { font-size: 11px; }
  .article-read { font-size: 12px; }
}

/* -------------------------------------------------------------------------
   9. Services list
   ------------------------------------------------------------------------- */
.services {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
}
.service {
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--rule-dark);
  padding: 40px 36px;
}
.service h3 {
  color: var(--paper);
  margin: 0 0 16px;
}
.service p {
  margin: 0;
  max-width: none;
  color: rgba(255, 255, 255, 0.86);
}

/* -------------------------------------------------------------------------
   10. Case studies
   ------------------------------------------------------------------------- */
.case {
  padding: 56px 0;
  border-top: 1px solid var(--rule-dark);
}
.on-paper .case { border-top-color: var(--rule); }
.case:first-of-type { border-top: 1px solid var(--rule-dark); }
.case-meta {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mute-dark);
  margin-bottom: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}
.on-paper .case-meta { color: var(--mute); }
.case-meta .sep { opacity: 0.5; }
.case-body { display: grid; grid-template-columns: 5fr 7fr; gap: 64px; }
.case h3 {
  font-size: 32px;
  line-height: 1.15;
  margin: 0;
  max-width: 14ch;
}
.case-narrative p { max-width: 60ch; margin-bottom: 1em; }
.case-narrative p:last-child { margin-bottom: 0; }
.case-narrative .label {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 17px;
  color: inherit;
}

/* -------------------------------------------------------------------------
   11. Capabilities list
   ------------------------------------------------------------------------- */
.caps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0 48px;
  border-top: 1px solid var(--rule);
}
.cap {
  border-bottom: 1px solid var(--rule);
  padding: 18px 0;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  line-height: 1.5;
  color: var(--ink);
}
.cap .arrow-thin {
  color: var(--mute);
  margin-right: 12px;
}

/* -------------------------------------------------------------------------
   12. Principals
   ------------------------------------------------------------------------- */
.principals {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
}
.principal {
  border: 1px solid var(--ink);
  padding: 40px 36px;
  position: relative;
}
.principal .p-linkedin {
  position: absolute;
  top: 28px;
  right: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--ink);
  border-radius: 4px;
  color: var(--ink);
  background: transparent;
  transition: background var(--t-fast), color var(--t-fast);
  border-bottom: 1px solid var(--ink);
}
.principal .p-linkedin:hover {
  background: var(--ink);
  color: var(--paper);
  border-bottom: 1px solid var(--ink);
}
.principal .p-linkedin svg { display: block; }
.principal .p-name {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 4px;
}
.principal .p-role {
  font-family: var(--sans);
  font-size: 15px;
  color: var(--mute);
  margin-bottom: 6px;
}
.principal .p-email {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  display: inline-block;
  margin-bottom: 28px;
}
.principal p { max-width: 50ch; }

.stat-line {
  margin: 56px 0 0;
  padding-top: 0;
  border-top: 0;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 17px;
  line-height: 1.55;
  letter-spacing: 0;
  color: var(--ink);
  text-transform: none;
  max-width: 720px;
}

/* -------------------------------------------------------------------------
   13. Engagement tiers
   ------------------------------------------------------------------------- */
.tiers {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--rule-dark);
}
.on-paper .tiers { border-top-color: var(--rule); }
.tier {
  padding: 48px 40px 8px 40px;
  border-right: 1px solid var(--rule-dark);
}
.on-paper .tier { border-right-color: var(--rule); }
.tier:first-child { padding-left: 0; }
.tier:last-child { border-right: none; padding-right: 0; }
.tier-label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin-bottom: 28px;
  color: var(--paper);
}
.on-paper .tier-label { color: var(--ink); }
.tier h3 { font-size: 24px; margin-bottom: 16px; }
.tier p { max-width: 32ch; }

/* -------------------------------------------------------------------------
   14. Contact form
   ------------------------------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 96px;
}
.form { display: grid; gap: 28px; }
.field { display: grid; gap: 8px; }
.field label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mute);
}
.field input,
.field textarea {
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.5;
  color: var(--ink);
  background: var(--paper);
  border: 0;
  border-bottom: 1px solid var(--ink);
  padding: 8px 0 12px;
  border-radius: 0;
  width: 100%;
}
.field input:focus,
.field textarea:focus {
  outline: none;
  border-bottom-width: 2px;
  padding-bottom: 11px;
}
.field textarea { resize: vertical; min-height: 140px; }
.form .btn { justify-self: start; margin-top: 12px; }

.contact-direct .label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mute);
  margin-bottom: 18px;
  display: block;
}
.contact-direct a { display: block; font-family: var(--mono); font-size: 14px; margin-bottom: 6px; }
.contact-direct .city {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  margin-top: 32px;
  color: var(--mute);
}

.form-success {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 28px;
  line-height: 1.3;
  letter-spacing: -0.015em;
  max-width: 28ch;
}

/* -------------------------------------------------------------------------
   15. Footer
   ------------------------------------------------------------------------- */
.footer {
  border-top: 1px solid var(--rule);
  padding: 40px 0;
  background: var(--paper);
  color: var(--ink);
}
.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--pad-x);
  display: flex;
  justify-content: space-between;
  gap: 24px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mute);
}
.footer-inner .stack > div + div { margin-top: 4px; }

/* -------------------------------------------------------------------------
   16. Projects page (expanded case studies)
   ------------------------------------------------------------------------- */
.project-intro {
  padding-top: 120px;
  padding-bottom: 32px;
}
.project-intro p {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 36px;
  line-height: 1.15;
  letter-spacing: -0.015em;
  max-width: 22ch;
  margin: 0;
}

.project {
  padding: 80px 0;
  border-top: 1px solid var(--rule);
}
.project:first-of-type { border-top: 1px solid var(--ink); }
.project-head {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 64px;
  margin-bottom: 48px;
}
.project-meta {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mute);
  display: grid;
  gap: 6px;
}
.project-meta .row { display: flex; gap: 12px; }
.project-meta .k { min-width: 80px; color: var(--mute); }
.project-meta .v { color: var(--ink); }
.project h2 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 44px;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0;
}
.project-num {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--mute);
  display: block;
  margin-bottom: 18px;
}
.project-body {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 64px;
}
.project-body h4 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mute);
  margin: 0 0 14px;
}
.project-body section + section { margin-top: 36px; }
.project-body p { max-width: 62ch; }

/* -------------------------------------------------------------------------
   17. Fade-up on scroll
   ------------------------------------------------------------------------- */
/* Progressive enhancement: only hide reveals when JS is active.
   Without JS (or before JS runs) content stays visible. */
.js .reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--t-fade), transform var(--t-fade);
  will-change: opacity, transform;
}
.js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
}

/* -------------------------------------------------------------------------
   18. Responsive — single breakpoint at 900px
   ------------------------------------------------------------------------- */
@media (max-width: 900px) {
  :root {
    --pad-x: 24px;
    --pad-y: 80px;
  }

  .h-hero    { font-size: 56px; }
  .h-section { font-size: 38px; }
  .h-sub     { font-size: 24px; }
  .lede      { font-size: 18px; }
  body       { font-size: 16px; }

  .hero { padding: 96px 0 80px; }
  .hero .eyebrow { margin-bottom: 32px; }
  .hero-actions { gap: 20px 24px; }

  .section-head { margin-bottom: 48px; }

  .grid-2, .grid-3, .grid-12,
  .services,
  .principals,
  .case-body,
  .contact-grid,
  .project-head,
  .project-body {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .case h3 { font-size: 26px; }
  .project h2 { font-size: 30px; }
  .project-intro p { font-size: 24px; }

  .caps { grid-template-columns: 1fr; gap: 0; }

  .tiers { grid-template-columns: 1fr; }
  .tier {
    padding: 32px 0;
    border-right: none;
    border-bottom: 1px solid var(--rule-dark);
  }
  .on-paper .tier { border-bottom-color: var(--rule); }
  .tier:last-child { border-bottom: none; }

  .nav-toggle { display: inline-block; flex-shrink: 0; }
  .nav-inner { gap: 16px; padding-top: 16px; padding-bottom: 16px; }
  .nav-brand .b-serif { font-size: 18px; }
  .nav-brand .b-sans  { font-size: 11px; }
  .nav-brand .b-sep   { font-size: 12px; }
  .nav-brand          { gap: 8px; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--ink);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 24px 24px;
    border-bottom: 1px solid var(--rule-dark);
  }
  .nav-links.is-open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a {
    display: block;
    padding: 14px 0;
    border-bottom: 1px solid var(--rule-dark);
    width: 100%;
  }
  .nav-links li:last-child a { border-bottom: none; }

  .footer-inner { flex-direction: column; }
}