/* ─────────────────────────────────────────────
   Harrington Centre — Clean Minimal Design System
   Concept 2: Off-white · Near-black · Think-tank
   v2 — Larger type, generous spacing, wider canvas
───────────────────────────────────────────── */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;1,300;1,400&family=DM+Sans:wght@300;400;500&display=swap');

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 17px; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ── Tokens (h_v4 palette) ── */
:root {
  --bg:       #f5f1eb;
  --bg-white: #faf8f3;
  --ink:       #1b1b1b;
  --ink-mid:   #4a4844;
  --ink-muted: #676767;
  --rule:      rgba(0,0,0,.08);
  --accent:    #b08f62;           /* warm tan — eyebrows, accents */
  --accent-hover: #3a3830;

  /* Footer link colour — adjustable via footer-link-tuner.html */
  --footer-link:       rgba(245,243,239,.75);
  --footer-link-hover: #f5f1eb;

  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'DM Sans', system-ui, sans-serif;

  /* Wider canvas, generous side margins */
  --max-w:   1400px;
  --pad-x:   clamp(2rem, 5.5vw, 5rem);
  --section-y: clamp(5rem, 10vw, 9rem);

  --ease: cubic-bezier(.4,0,.2,1);
  --fast: 180ms;
  --slow: 380ms;
}

/* ── Base ── */
body {
  background: var(--bg) !important;
  color: var(--ink);
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 1.05rem;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

/* ── Typography scale — all bumped up ── */
.display {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(4.5rem, 8vw, 8rem);
  line-height: 0.93;
  letter-spacing: -0.03em;
}
h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(3.5rem, 6vw, 6.5rem);
  line-height: 0.96;
  letter-spacing: -0.03em;
}
h2, .h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.6rem, 4.5vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
}
h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.5rem, 2.5vw, 2.2rem);
  line-height: 1.2;
}
h4 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.2rem, 1.8vw, 1.6rem);
  line-height: 1.3;
}
.label {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}
p { line-height: 1.85; font-size: 1.05rem; }
strong { font-weight: 500; }

/* ── Layout ── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}
.section { padding: var(--section-y) 0; }
.scroll-progress { position: fixed; top: 0; left: 0; height: 2px; width: 0; background: var(--ink); z-index: 1100; transition: width .12s linear; }

/* ── Shared utilities: scroll-reveal + image placeholders ── */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.ph { background-color: #e7ded1; background-image: repeating-linear-gradient(135deg, rgba(0,0,0,.035) 0 12px, transparent 12px 24px); display: grid; place-items: center; }
.ph code { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: .64rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-muted); background: rgba(245,241,235,.7); padding: .35rem .6rem; border-radius: 2px; text-align: center; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: .11em;
  text-transform: uppercase;
  padding: .9rem 2.2rem;
  border: 1px solid var(--ink);
  border-radius: 2px;
  cursor: pointer;
  transition: background var(--fast) var(--ease), color var(--fast) var(--ease);
}
.btn-dark { background: var(--ink); color: var(--bg); }
.btn-dark:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-outline { background: transparent; color: var(--ink); }
.btn-outline:hover { background: var(--ink); color: var(--bg); }

/* ── Footer ── */
.site-footer {
  background: var(--ink);
  color: rgba(245,243,239,.7);
  padding: 5rem 0 2.5rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 4rem;
  padding-bottom: 3.5rem;
  border-bottom: 1px solid rgba(245,243,239,.1);
}
.footer-logo-main {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 300;
  color: var(--bg);
  margin-bottom: .3rem;
  line-height: 1;
}
.footer-logo-sub {
  font-size: 0.72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: rgba(245,243,239,.4);
  margin-bottom: 1.5rem;
}
.footer-desc { font-size: .95rem; line-height: 1.8; max-width: 30ch; color: rgba(245,243,239,.55); }
.footer-col-title {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: rgba(245,243,239,.35);
  margin-bottom: 1.25rem;
}
.footer-links { display: flex; flex-direction: column; gap: .65rem; }
.footer-links a {
  font-size: .95rem;
  color: var(--footer-link, rgba(245,243,239,.78));
  font-weight: 500;
  transition: color var(--fast) var(--ease);
}
.footer-links a:hover { color: var(--footer-link-hover, #c9a978); }
.footer-address { font-size: .95rem; line-height: 2; font-style: normal; color: rgba(245,243,239,.45); }
.footer-address a { color: rgba(245,243,239,.6); transition: color var(--fast) var(--ease); }
.footer-address a:hover { color: var(--bg); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  font-size: .82rem;
  color: rgba(245,243,239,.3);
}
.footer-social { display: flex; flex-wrap: wrap; gap: .75rem 1.5rem; }
.footer-social a {
  color: rgba(245,243,239,.35);
  font-size: .82rem;
  letter-spacing: .07em;
  text-transform: uppercase;
  transition: color var(--fast);
}
.footer-social a:hover { color: var(--bg); }

/* ── Project prev/next nav (unitary — rendered from project-common.js) ── */
.project-nav { border-top: 1px solid var(--rule); padding: clamp(3rem,5vw,4rem) 0; }
.project-nav-inner { display: flex; justify-content: space-between; align-items: center; gap: 2rem; flex-wrap: wrap; }
.project-nav a { display: inline-flex; flex-direction: column; gap: .35rem; }
.project-nav a.prev { align-items: flex-start; }
.project-nav a.next { align-items: flex-end; text-align: right; }
.project-nav .k { font-size: .68rem; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-muted); }
.project-nav .t { font-family: var(--font-display); font-size: 1.5rem; transition: color var(--fast) var(--ease); }
.project-nav a:hover .t { color: var(--accent); }
/* Mobile layout pieces — hidden on desktop */
.project-nav .np-arrow,
.project-nav .np-num { display: none; }
.project-nav .k-short { display: none; }
.project-nav .np-body { display: flex; flex-direction: column; gap: .35rem; }

/* ── Project nav — mobile (<700px): model 2 (cream + cool stone, watermark numbers) ── */
@media (max-width: 700px) {
  .project-nav { border-top: none; padding: 0; }
  .project-nav-inner {
    flex-direction: column; gap: 0; align-items: stretch; padding: 0; max-width: none; margin: 0;
    background: #faf8f3; overflow: hidden;
  }
  .project-nav a,
  .project-nav a.prev,
  .project-nav a.next {
    position: relative; flex-direction: row; align-items: center; gap: 16px;
    min-height: 117px; padding: 0 26px; text-align: left; overflow: hidden;
  }
  .project-nav a.prev { background: #efe7d4; border-bottom: none; }
  .project-nav a.next { background: #e7e7e1; }
  .project-nav .np-arrow {
    display: block; flex: none; font-family: var(--font-display);
    font-size: 36px; line-height: 1; color: var(--accent);
  }
  .project-nav a.next .np-arrow { order: 2; }
  .project-nav .np-body { flex: 1; position: relative; z-index: 2; gap: 5px; }
  .project-nav a.prev .np-body { padding-right: 56px; }
  .project-nav a.next .np-body { padding-left: 56px; text-align: right; }
  .project-nav .k-full { display: none; }
  .project-nav .k-short {
    display: block; font-size: 10px; letter-spacing: .16em;
    text-transform: uppercase; color: var(--accent);
  }
  .project-nav .t { font-size: clamp(15px, 6vw, 23px); line-height: 1.12; color: #1b1b1b; }
  .project-nav .t1, .project-nav .t2 { display: block; white-space: nowrap; }
  .project-nav .np-num {
    display: block; position: absolute; top: 50%; transform: translateY(-50%);
    font-family: var(--font-display); font-size: clamp(44px, 16vw, 64px); line-height: 1;
    color: rgba(176,143,98,.18); pointer-events: none; z-index: 1;
  }
  .project-nav a.prev .np-num { right: 16px; }
  .project-nav a.next .np-num { left: 16px; }
}

/* ── Project nav — very narrow phones (<360px): tighten padding, shrink the
   watermark numerals, and let long titles wrap so nothing is clipped. ── */
@media (max-width: 360px) {
  .project-nav a,
  .project-nav a.prev,
  .project-nav a.next { padding: 0 16px; min-height: 104px; gap: 12px; }
  .project-nav .np-arrow { font-size: 28px; }
  .project-nav a.prev .np-body { padding-right: 34px; }
  .project-nav a.next .np-body { padding-left: 34px; }
  .project-nav .t1, .project-nav .t2 { white-space: normal; }
}

/* ── Animations ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(26px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-up { animation: fadeUp .75s var(--ease) both; }
.fade-up-1 { animation-delay: .1s; }
.fade-up-2 { animation-delay: .22s; }
.fade-up-3 { animation-delay: .36s; }
.fade-up-4 { animation-delay: .5s; }

/* ── Responsive ── */
@media (max-width: 960px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2.5rem; }
}
@media (max-width: 950px) {
  .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
}
@media (max-width: 600px) {
  html { font-size: 15px; }
  .footer-grid { grid-template-columns: 1fr; }
}
/* ── Sub-350px: display type keeps shrinking with the viewport so the biggest
   headings don't overflow narrow phones. Heavier (larger) type scales down more
   via vw, with legible rem floors. ── */
@media (max-width: 350px) {
  html { font-size: 14px; }
  .hero-display { font-size: clamp(2.1rem, 11vw, 3rem); }
  h1 { font-size: clamp(1.85rem, 9.5vw, 2.6rem); }
  h2, .h2 { font-size: clamp(1.5rem, 7.5vw, 2.1rem); }
  h3 { font-size: clamp(1.2rem, 5vw, 1.5rem); }
}

/* ── Back-to-top — SINGLE DEFINITION for the whole site.
   The button element is injected by project-common.js; no page should
   declare its own .back-to-top styles or <button> markup. ── */
.back-to-top {
  position: fixed;
  right: clamp(1rem, 3vw, 2.5rem);
  bottom: clamp(1rem, 3vw, 2.5rem);
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--ink); color: var(--bg);
  border: 1px solid var(--ink);
  font-family: var(--font-body); font-size: 1rem; line-height: 1;
  display: grid; place-items: center;
  cursor: pointer;
  opacity: 0; pointer-events: none; transform: translateY(10px);
  transition: opacity .35s var(--ease), transform .35s var(--ease),
              background .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
  z-index: 90;
}
.back-to-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-to-top:hover { background: transparent; color: var(--ink); }
/* Over dark sections the button inverts so it stays visible */
.back-to-top.on-dark { background: var(--bg); color: var(--ink); border-color: var(--bg); }
.back-to-top.on-dark:hover { background: transparent; color: var(--bg); }