/* =====================================================================
   layout.css  —  page scaffolding: container, header, nav, footer
   ===================================================================== */
.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: 18px; }
@media (min-width: 760px) { .container { padding-inline: 32px; } }

/* Sticky header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(9px); -webkit-backdrop-filter: blur(9px);
  border-bottom: 1px solid var(--hairline);
}
.site-header__inner { display: flex; align-items: center; gap: 14px; min-height: var(--header-h); position: relative; }
.brand { display: inline-flex; align-items: center; gap: 9px; text-decoration: none; flex: 0 0 auto; }
.brand__mark { width: 30px; height: 30px; }
.brand__name { font-family: var(--font-serif); font-weight: 600; font-size: 20px; letter-spacing: -.01em; }

/* Nav */
.site-nav { margin-left: auto; min-width: 0; }
.site-nav__list { list-style: none; display: flex; gap: 26px; align-items: center; margin: 0; padding: 0; overflow-x: auto; scrollbar-width: none; }
.site-nav__list::-webkit-scrollbar { display: none; }
.nav-link {
  display: block; white-space: nowrap; text-decoration: none; color: var(--ink-bright);
  font-size: 13.5px; font-weight: 600; letter-spacing: .01em;
  padding: 8px 2px; background: none; border-radius: 0;
  position: relative; transition: color .2s;
}
.nav-link::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 2px; height: 2px;
  border-radius: 2px; background: var(--accent);
  transform: scaleX(0); transform-origin: left; transition: transform .22s ease;
}
.nav-link:hover::after, .nav-link.is-active::after { transform: scaleX(1); }

/* Hamburger */
.nav-toggle {
  display: none; margin-left: auto; width: 42px; height: 42px; border: 0;
  border-radius: var(--radius-sm); background: var(--chip); align-items: center; justify-content: center;
}
.nav-toggle__bars, .nav-toggle__bars::before, .nav-toggle__bars::after {
  content: ""; display: block; width: 20px; height: 2px; background: var(--color-ink);
  transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle__bars { position: relative; }
.nav-toggle__bars::before { content:""; position: absolute; top: -6px; }
.nav-toggle__bars::after  { content:""; position: absolute; top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after  { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 980px) {
  .nav-toggle { display: inline-flex; }
  .site-nav__list { gap: 4px; align-items: stretch; }
  .nav-link { background: var(--chip); border-radius: var(--radius-sm); padding: 12px 14px; font-size: 15px; }
  .nav-link::after { display: none; }
  .nav-link:hover { background: var(--chip-hover); }
  .nav-group.is-open .nav-group__btn { background: var(--chip-hover); }
  .nav-link--cta { border-radius: var(--radius-sm); padding: 13px 14px; }
  .site-nav {
    position: absolute; left: 0; right: 0; top: 100%;
    background: var(--color-bg); border-bottom: 1px solid var(--hairline);
    max-height: 0; overflow: hidden; transition: max-height .3s ease;
  }
  .site-nav.is-open { max-height: 80vh; overflow-y: auto; }
  .site-nav__list { flex-direction: column; gap: 0; padding: 8px 18px 16px; }
  .nav-link { font-size: 15px; padding: 12px 10px; border-radius: var(--radius-sm); }
}

/* Page header (hero) */
.page-header { padding: var(--space-6) 0 var(--space-4); }
.eyebrow { font-size: 11px; font-weight: 700; letter-spacing: .28em; text-transform: uppercase; color: var(--color-ink-2); }
.page-title {
  font-family: var(--font-serif); font-optical-sizing: auto;
  font-size: clamp(46px, 9vw, 88px); font-weight: 600; letter-spacing: -.025em;
  line-height: .94; margin-top: 12px; font-variation-settings: 'SOFT' 30, 'WONK' 1;
}
.page-sub { font-family: var(--font-serif); font-style: italic; font-size: clamp(17px, 2.4vw, 21px); color: var(--color-ink-2); margin-top: 14px; max-width: 62ch; }

.section { padding-bottom: var(--space-6); }

/* Footer */
.site-footer { border-top: 3px solid var(--hairline); padding: var(--space-5) 0 var(--space-6); margin-top: var(--space-6); font-size: 13px; color: var(--color-ink-2); line-height: 2; }
.site-footer a { color: var(--ink-bright); font-weight: 600; text-decoration: none;
  background: var(--chip); padding: 3px 10px; border-radius: var(--radius-pill);
  line-height: 2.3; transition: background .2s; }
.site-footer a:hover { background: var(--chip-hover); }
.site-footer__brand { font-weight: 800; }

/* ================= grouped nav with dropdowns (v3) =================== */
.site-nav__list { overflow: visible; }
.nav-group { position: relative; }
.nav-group__btn { border: 0; cursor: pointer; display: inline-flex; align-items: center; font-family: var(--font-sans); }
.nav-group.is-open .nav-group__btn::after { transform: scaleX(1); }
.nav-caret { width: 13px; height: 13px; transition: transform .2s; }
.nav-group.is-open .nav-caret { transform: rotate(180deg); }

.nav-drop {
  position: absolute; top: calc(100% + 12px); left: 50%; z-index: 120;
  min-width: 196px; margin: 0; padding: 7px; list-style: none;
  background: var(--color-bg); border: 1px solid var(--hairline);
  border-radius: 14px; box-shadow: 0 24px 48px -20px rgba(0, 0, 0, .4);
  opacity: 0; visibility: hidden; transform: translateX(-50%) translateY(8px);
  transition: opacity .18s ease, transform .18s ease, visibility .18s;
}
.nav-drop::before {
  content: ""; position: absolute; top: -6px; left: 50%; margin-left: -6px;
  width: 12px; height: 12px; transform: rotate(45deg);
  background: var(--color-bg); border-left: 1px solid var(--hairline); border-top: 1px solid var(--hairline);
}
.nav-group.is-open .nav-drop { opacity: 1; visibility: visible; transform: translateX(-50%); }
.nav-drop__link {
  display: block; padding: 10px 13px; border-radius: var(--radius-sm);
  text-decoration: none; color: var(--ink-bright); font-size: 13.5px; font-weight: 600;
  white-space: nowrap; transition: background .15s;
}
.nav-drop__link:hover { background: var(--chip-hover); }
.nav-drop__link.is-active { background: var(--accent); color: var(--on-accent); }

.nav-link--cta {
  background: var(--accent); color: var(--on-accent);
  font-weight: 800; font-size: 12.5px; letter-spacing: .1em;
  padding: 10px 22px; border-radius: var(--radius-pill);
  border: 2px solid var(--accent);
  box-shadow: inset 0 0 0 2px var(--on-accent);
  transition: transform .18s ease, box-shadow .18s ease, filter .18s;
}
.nav-link--cta::after { display: none; }
.nav-link--cta:hover { transform: translateY(-1px); filter: brightness(1.07); box-shadow: inset 0 0 0 2px var(--on-accent), 0 10px 22px -10px rgba(0, 0, 0, .45); }

/* mobile: groups become labeled sections in the slide-down panel */
@media (max-width: 980px) {
  .nav-group { position: static; }
  .nav-group__btn { width: 100%; justify-content: space-between; display: flex; }
  .nav-drop {
    position: static; min-width: 0; box-shadow: none; border: 0;
    background: transparent; padding: 0 0 4px 10px;
    opacity: 1; visibility: visible; transform: none;
    max-height: 0; overflow: hidden; transition: max-height .25s ease;
  }
  .nav-group.is-open .nav-drop { max-height: 420px; }
  .nav-drop__link { white-space: normal; padding: 11px 12px; font-size: 14.5px; }
  .nav-link--cta { text-align: center; margin-top: 6px; }
}