/* ==========================================================================
   Integrated Septic Solutions — site chrome
   Header, navigation, footer. Requires tokens.css and base.css.
   ========================================================================== */

/* --- Skip link ------------------------------------------------------------ */

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -4rem;
  z-index: 100;
  background: var(--iss-navy-deep);
  color: #fff;
  padding: var(--space-2xs) var(--space-sm);
  border-radius: var(--radius);
  transition: top 120ms ease;
}
.skip-link:focus { top: var(--space-2xs); color: #fff; }


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

.site-header {
  width: 100%;
  background: var(--color-bg);
  border-bottom: var(--border-hair);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-header__inner {
  max-width: var(--container-wide);
  margin-inline: auto;
  padding: var(--space-sm) var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

/* Mark is swappable: the box sizes to height, not to the current artwork. */
.site-logo { display: block; flex: 0 0 auto; }
.site-logo img { height: 44px; width: auto; }

@media (min-width: 60rem) {
  .site-logo img { height: 52px; }
}


/* --- Navigation ----------------------------------------------------------- */

.nav-toggle {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  background: none;
  border: var(--border-hair);
  border-radius: var(--radius);
  padding: var(--space-2xs) var(--space-xs);
  font-size: var(--size-small);
  color: var(--color-heading);
  cursor: pointer;
}
.nav-toggle:hover { border-color: var(--iss-blue-500); }

.nav-toggle__bars { display: block; width: 18px; height: 2px; background: currentColor;
                    position: relative; }
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: ""; position: absolute; left: 0; width: 18px; height: 2px; background: currentColor;
}
.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after  { top: 6px; }

.site-nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.site-nav a {
  display: block;
  padding: var(--space-xs) 0;
  font-size: var(--size-small);
  color: var(--color-heading);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border-soft);
}
.site-nav a:hover { color: var(--color-link); }

.site-nav a[aria-current="page"] {
  color: var(--color-link);
  font-weight: var(--weight-medium);
}

/* Mobile: panel collapses below the header bar. */
@media (max-width: 59.999rem) {
  .site-header__inner { flex-wrap: wrap; }
  .site-nav {
    flex-basis: 100%;
    display: none;
    padding-bottom: var(--space-2xs);
  }
  .site-nav.is-open { display: block; }
}

/* Desktop: inline row, toggle disappears. */
@media (min-width: 60rem) {
  .nav-toggle { display: none; }
  .site-nav { display: block !important; }
  .site-nav ul { flex-direction: row; gap: var(--space-md); align-items: center; }
  .site-nav a {
    padding: var(--space-2xs) 0;
    border-bottom: 2px solid transparent;
    white-space: nowrap;
  }
  .site-nav a:hover { border-bottom-color: var(--iss-blue-400); }
  .site-nav a[aria-current="page"] { border-bottom-color: var(--iss-navy); }
}

@media (min-width: 75rem) {
  .site-nav ul { gap: var(--space-lg); }
  .site-nav a { font-size: var(--size-body); }
}


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

.site-footer {
  background: var(--iss-navy-deep);
  color: var(--color-text-inverse-mut);
  padding-block: var(--space-xl) var(--space-lg);
}

.site-footer__inner {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1fr;
}

@media (min-width: 40rem) {
  .site-footer__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 60rem) {
  .site-footer__inner { grid-template-columns: 1.4fr 1fr 1fr; gap: var(--space-xl); }
}

.site-footer h2 {
  font-family: var(--font-text);
  font-size: var(--size-small);
  font-weight: var(--weight-bold);
  color: #fff;
  margin-bottom: var(--space-xs);
}

/* Reversed mark. Capped at native width so it never upscales into softness. */
.site-footer__brand { margin-bottom: var(--space-sm); }
.site-footer__brand img { max-width: 168px; width: 100%; height: auto; }

.site-footer p { color: var(--color-text-inverse-mut); max-width: 38ch; }
.site-footer a { color: #fff; text-decoration: none; }
.site-footer a:hover { color: var(--iss-sky); text-decoration: underline; }

.site-footer ul { list-style: none; }
/* Vertical spacing for stacked link lists only. The credentials row below is
   horizontal and must not inherit it. */
.site-footer__inner li + li { margin-top: var(--space-2xs); }

.site-footer__contact { font-size: var(--size-small); line-height: 1.9;
                        font-variant-numeric: lining-nums; }

.site-footer__bar {
  max-width: var(--container);
  margin: var(--space-xl) auto 0;
  padding: var(--space-md) var(--gutter) 0;
  border-top: 1px solid rgba(255,255,255,.16);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-sm) var(--space-md);
  justify-content: space-between;
  font-size: var(--size-caption);
}

.site-footer__creds {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2xs) var(--space-sm);
  list-style: none;
}

.site-footer__creds li + li { margin-top: 0; }