/*
  Sepivex — Layout
  Containers, global page chrome (header/nav/footer), section rhythm,
  and responsive breakpoints. No page-specific layout here — see page-*.css.
*/

/* ---- Container ---- */

.wrap {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.wrap-narrow {
  max-width: var(--content-max-width-narrow);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---- Section rhythm ---- */

.section {
  padding: var(--section-padding-desktop) 0;
  border-bottom: var(--border-width) solid var(--border);
}

.section:last-of-type {
  border-bottom: none;
}

@media (max-width: 1024px) {
  .section { padding: var(--section-padding-tablet) 0; }
}

@media (max-width: 640px) {
  .section { padding: var(--section-padding-mobile) 0; }
  .wrap, .wrap-narrow { padding: 0 var(--space-3); }
}

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

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

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.site-header__brand {
  display: flex;
  align-items: center;
}

/* Desktop lockup, hidden below the lockup's own min-width threshold
   (brand guide: drop the wordmark under ~110px lockup width — here
   we key that to viewport width, since header lockup is fixed-height). */
.site-header__brand img.lockup {
  height: 28px;
  width: auto;
}

.site-header__brand img.mark-only {
  height: 28px;
  width: auto;
  display: none;
}

@media (max-width: 480px) {
  .site-header__brand img.lockup { display: none; }
  .site-header__brand img.mark-only { display: block; }
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.site-nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.site-nav__links a {
  color: var(--text-secondary);
  font-size: var(--text-small-size);
  font-weight: var(--weight-medium);
}

.site-nav__links a:hover,
.site-nav__links a:focus-visible {
  color: var(--text-primary);
  text-decoration: none;
}

.site-nav__links a[aria-current="page"] {
  color: var(--text-primary);
}

@media (max-width: 900px) {
  .site-nav__links { display: none; }
}

/* ---- Mobile navigation ---- */

.mobile-nav-toggle {
  display: none;
  background: transparent;
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius-control);
  padding: 8px 10px;
  color: var(--text-primary);
  cursor: pointer;
}

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

.mobile-nav {
  display: none;
  position: fixed;
  inset: 72px 0 0 0;
  background: var(--bg);
  z-index: 49;
  overflow-y: auto;
}

.mobile-nav[data-open="true"] {
  display: block;
}

.mobile-nav .wrap {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
}

.mobile-nav a {
  color: var(--text-primary);
  font-size: var(--text-h3-size);
  padding: var(--space-1) 0;
  border-bottom: var(--border-width) solid var(--border);
}

.mobile-nav .btn {
  margin-top: var(--space-2);
  width: 100%;
  justify-content: center;
}

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

.site-footer {
  border-top: var(--border-width) solid var(--border);
  padding: var(--space-8) 0 var(--space-6);
}

.site-footer .wrap {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.site-footer__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.site-footer__brand img {
  height: 24px;
  width: auto;
}

.site-footer__nav {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.site-footer__nav a {
  color: var(--text-secondary);
  font-size: var(--text-small-size);
}

.site-footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding-top: var(--space-3);
  border-top: var(--border-width) solid var(--border);
}

.site-footer__copyright {
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 12px;
}

.site-footer__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-3);
}

/* Legal links: same small mono style as the copyright line, but in
   --text-secondary so they meet WCAG AA contrast as interactive text. */
.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-3);
}

.site-footer__legal a {
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 12px;
}

.site-footer__legal a:hover,
.site-footer__legal a:focus-visible {
  color: var(--text-primary);
}

/* Social profile links: inline SVG icons only (no third-party requests). */
.site-footer__social {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.site-footer__social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--text-secondary);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius-control);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.site-footer__social a:hover,
.site-footer__social a:focus-visible {
  color: var(--text-primary);
  border-color: var(--text-tertiary);
  text-decoration: none;
}

/* ---- Basic responsive grid helpers ---- */

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}

@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .grid-2 { grid-template-columns: 1fr; }
}

/* ---- Skip link (keyboard users bypass the repeated header navigation) ---- */

.skip-link {
  position: absolute;
  left: var(--space-2);
  top: -100px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--surface-2);
  color: var(--text-primary);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius-control);
  font-size: var(--text-small-size);
  font-weight: var(--weight-medium);
}

.skip-link:focus,
.skip-link:focus-visible {
  top: var(--space-2);
  text-decoration: none;
}