/* ===== Shell, header, sections, footer ===== */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 40px);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(12px);
  border-block-end: 1px solid transparent;
  transition: border-color .25s var(--ease), background .25s var(--ease);
}
.site-header.is-stuck { border-block-end-color: var(--line); }
.site-header .wrap {
  display: flex; align-items: center; gap: var(--sp-5);
  min-height: 72px;
}

.brand { display: flex; align-items: center; gap: var(--sp-3); margin-inline-end: auto; }
.brand__mark {
  width: 38px; height: 38px; flex: none;
  display: grid; place-items: center;
  border-radius: 11px;
  background: linear-gradient(145deg, var(--brand), #b1462f 70%, var(--pine));
  color: #fff; font-family: "IBM Plex Sans", var(--font-body); font-weight: 600;
  font-size: .78rem; letter-spacing: .03em; direction: ltr;
}
.brand__text { display: flex; flex-direction: column; line-height: 1.3; }
.brand__name { font-family: var(--font-display); font-weight: 600; font-size: .98rem; }
.brand__role { font-size: .74rem; color: var(--muted); }

.nav { display: flex; align-items: center; gap: var(--sp-2); }
.nav a:not(.btn) {
  font-size: .9rem; color: var(--ink-2);
  padding: var(--sp-2) var(--sp-3); border-radius: 9px;
  transition: color .18s var(--ease), background .18s var(--ease);
}
.nav a:not(.btn):hover { color: var(--brand); background: var(--brand-soft); }
.nav a:not(.btn)[aria-current="true"] { color: var(--brand); font-weight: 500; }
.nav a.btn--primary { color: #fff; }

.nav-toggle {
  display: none; width: 42px; height: 42px; flex: none;
  align-items: center; justify-content: center;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 11px; color: var(--ink); cursor: pointer;
}

/* ---------- Sections ---------- */
.section { padding-block: var(--sp-9); }
.section--tint { background: var(--paper-deep); }
.section--edge { border-block-start: 1px solid var(--line); }

.section-head { max-width: 62ch; margin-block-end: var(--sp-7); }
.eyebrow {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  font-size: .78rem; font-weight: 500; letter-spacing: .06em;
  color: var(--brand); text-transform: uppercase;
  margin-block-end: var(--sp-3);
}
.eyebrow::before {
  content: ""; width: 26px; height: 2px; border-radius: 2px;
  background: var(--brand); flex: none;
}
.section-head p { color: var(--muted); margin-block-start: var(--sp-3); }

.grid-2 { display: grid; gap: var(--sp-6); grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { display: grid; gap: var(--sp-5); grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-about { display: grid; gap: var(--sp-7); grid-template-columns: 1fr; align-items: start; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--ink); color: #cfd1d6;
  padding-block: var(--sp-7);
  font-size: var(--step-small);
}
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: var(--sp-4); align-items: center; justify-content: space-between; }
.site-footer a:hover { color: #fff; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .grid-about, .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .section { padding-block: var(--sp-8); }
}

@media (max-width: 760px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    position: fixed; inset-block-start: 72px; inset-inline: 12px;
    flex-direction: column; align-items: stretch; gap: var(--sp-1);
    background: var(--surface); border: 1px solid var(--line);
    border-radius: var(--radius); padding: var(--sp-3);
    box-shadow: var(--shadow-md);
    transform: translateY(-8px); opacity: 0; pointer-events: none;
    transition: opacity .18s var(--ease), transform .18s var(--ease);
  }
  .nav.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav a { padding: var(--sp-3) var(--sp-4); font-size: .95rem; }
  .nav .btn { margin-block-start: var(--sp-2); justify-content: center; }
}