/* Page frame: header, navigation, main column, footer. */

.wrap {
  width: 100%;
  max-width: var(--page-width);
  margin-inline: auto;
  padding-inline: var(--page-gutter);
}

.main {
  flex: 1;
  padding-block: clamp(1.75rem, 4vw, 3rem) 4rem;
}

.section + .section {
  margin-top: clamp(2.5rem, 6vw, 4.5rem);
}

.stack > * + * {
  margin-top: 1rem;
}

/* --- Header -------------------------------------------------------------- */

.masthead {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--surface-raised) 88%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
}

.masthead__inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.03em;
  color: var(--text);
  text-decoration: none;
  margin-right: auto;
}

.brand:hover {
  color: var(--text);
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: var(--accent);
  color: var(--accent-contrast);
}

.brand__dim {
  color: var(--text-muted);
  font-weight: 500;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.nav__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.7rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 550;
  color: var(--text-muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition), background-color var(--transition);
}

.nav__link:hover {
  color: var(--text);
  background: var(--surface-sunken);
}

.nav__link--active {
  color: var(--accent);
  background: var(--accent-soft);
}

.nav__divider {
  width: 1px;
  height: 22px;
  background: var(--border);
  margin-inline: 0.4rem;
}

.nav__cta {
  color: var(--accent-contrast);
  background: var(--accent);
}

.nav__cta:hover {
  color: var(--accent-contrast);
  background: var(--accent-strong);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text);
}

@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav {
    display: none;
    position: absolute;
    inset-inline: var(--page-gutter);
    top: calc(100% + 0.5rem);
    flex-direction: column;
    align-items: stretch;
    gap: 0.15rem;
    padding: 0.5rem;
    background: var(--surface-raised);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
  }

  .nav--open {
    display: flex;
  }

  .nav__link {
    padding: 0.6rem 0.75rem;
    font-size: 0.95rem;
  }

  .nav__divider {
    width: auto;
    height: 1px;
    margin: 0.35rem 0;
  }

  .masthead__inner {
    position: relative;
  }
}

/* --- Footer -------------------------------------------------------------- */

.footer {
  border-top: 1px solid var(--border);
  background: var(--surface-raised);
  padding-block: 2.75rem 2rem;
  font-size: 0.9rem;
}

.footer__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 2rem;
}

.footer__heading {
  font-size: 0.78rem;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.footer__links a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer__links a:hover {
  color: var(--accent);
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  margin-top: 2.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.85rem;
}