/* ===========================================================
   layout.css — shell, header, nav, footer, grid
   =========================================================== */

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

.section { padding-block: var(--section-y); position: relative; }

.section-head { max-width: 62ch; margin-bottom: clamp(2rem, 4vw, 3.5rem); }
.section-head.center { margin-inline: auto; text-align: center; }
.section-head h2 { margin-top: .6rem; }
.section-head .lede { margin-top: 1.1rem; }
.section-head.center .lede { margin-inline: auto; }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem var(--pad-x);
  transition: background .4s var(--ease), box-shadow .4s var(--ease), padding .4s var(--ease);
}
.site-header.scrolled {
  background: color-mix(in srgb, var(--bone) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  box-shadow: 0 1px 0 var(--cream-line);
  padding-block: .75rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  color: var(--forest);
  position: relative;
  z-index: 2;
}
.brand .mark { width: 30px; height: 30px; flex: none; color: var(--forest); }
.brand .brand-name {
  font-family: var(--font-display);
  font-size: 1.32rem;
  letter-spacing: -.01em;
  line-height: 1;
  white-space: nowrap;
}
.brand .brand-name small {
  display: block;
  font-family: var(--font-body);
  font-size: .56rem;
  letter-spacing: .34em;
  text-transform: uppercase;
  color: var(--coral-deep);
  margin-top: .28rem;
  font-weight: 700;
}

/* ---------- Primary nav ---------- */
.nav-primary { display: flex; align-items: center; gap: clamp(1rem, 2.4vw, 2.4rem); }
.nav-links { display: flex; align-items: center; gap: clamp(1rem, 2vw, 2rem); }
.nav-links a {
  font-size: .92rem;
  font-weight: 500;
  color: var(--ink);
  position: relative;
  padding-block: .3rem;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 1.5px;
  background: var(--coral);
  transition: width .35s var(--ease);
}
.nav-links a:hover::after,
.nav-links a[aria-current="page"]::after { width: 100%; }
.nav-links a[aria-current="page"] { color: var(--coral-deep); }
/* .nav-links a would otherwise repaint the CTA's label dark ink over
   its emerald fill — the button keeps the colour its variant sets. */
.nav-links a.btn { color: var(--fg); }
.nav-links a.btn:hover { color: var(--bone); }

/* technical eyebrow: 01 / METHOD */
.tag-mono {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--coral-deep);
  display: inline-flex;
  align-items: center;
  gap: .7em;
  font-variant-numeric: tabular-nums;
}
.tag-mono::before {
  content: "";
  width: 18px; height: 1.5px;
  background: var(--coral);
}

/* Hamburger */
.nav-toggle {
  display: none;
  width: 46px; height: 46px;
  border: 1px solid var(--cream-line);
  border-radius: var(--r-pill);
  background: var(--paper);
  cursor: pointer;
  position: relative;
  z-index: 2;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  width: 18px; height: 2px;
  background: var(--forest);
  border-radius: 2px;
  transform: translate(-50%, -50%);
  transition: transform .35s var(--ease), opacity .25s var(--ease);
}
.nav-toggle span::before { transform: translate(-50%, -7px); }
.nav-toggle span::after  { transform: translate(-50%, 7px); }
body.nav-open .nav-toggle span { background: transparent; }
body.nav-open .nav-toggle span::before { transform: translate(-50%, 0) rotate(45deg); }
body.nav-open .nav-toggle span::after  { transform: translate(-50%, 0) rotate(-45deg); }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--forest);
  color: var(--bone);
  padding-top: clamp(4rem, 8vw, 6rem);
  position: relative;
  overflow: hidden;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, minmax(0, 1fr));
  gap: clamp(2rem, 5vw, 4rem);
  padding-bottom: 3.5rem;
}
.footer-brand .brand { color: var(--bone); }
.footer-brand .brand .mark { color: var(--bone); }
.footer-brand p { color: color-mix(in srgb, var(--bone) 72%, transparent); margin-top: 1.2rem; max-width: 32ch; }
.footer-col h4 { color: var(--bone); font-family: var(--font-body); font-size: .78rem; letter-spacing: .2em; text-transform: uppercase; font-weight: 700; margin-bottom: 1.1rem; opacity: .6; }
.footer-col a, .footer-col li { color: color-mix(in srgb, var(--bone) 80%, transparent); display: block; padding-block: .35rem; transition: color .25s var(--ease); font-size: .95rem; }
.footer-col a:hover { color: var(--coral); }
.footer-bottom {
  border-top: 1px solid color-mix(in srgb, var(--bone) 16%, transparent);
  padding-block: 1.6rem 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
  font-size: .82rem;
  color: color-mix(in srgb, var(--bone) 60%, transparent);
}
.footer-bottom a:hover { color: var(--coral); }
.footer-watermark {
  font-family: var(--font-display);
  font-size: clamp(4rem, 22vw, 18rem);
  line-height: .8;
  color: color-mix(in srgb, var(--bone) 6%, transparent);
  text-align: center;
  letter-spacing: -.04em;
  user-select: none;
  pointer-events: none;
  margin-top: -.1em;
  white-space: nowrap;
}

/* generic 2-col split */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
}