/* ==========================================================================
   Layout — containers, site header, site footer, page scaffolding
   ========================================================================== */

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

.container--narrow {
  max-width: calc(var(--container-narrow) + 2 * var(--gutter-narrow));
  padding-inline: var(--gutter-narrow);
}

main { flex: 1 0 auto; position: relative; z-index: 1; }

/* Case-study pages: pull content up under the sticky header so the dark hero
   sits behind the transparent header (hero top padding compensates). */
main:has(.cs-hero) { margin-top: calc(-1 * var(--header-h)); }

/* Page with the dotted background — white canvas; position context for the
   absolutely-positioned dot layer. */
body.has-dotted-bg { position: relative; }

/* Decorative dotted background — anchored at the top of the page, spanning the
   hero only (height + fade mask are set in JS), behind all page content. */
.dotted-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  pointer-events: none;
  z-index: 0;
}

.section { padding-block: clamp(var(--space-9), 8vw, var(--space-12)); }
.section--tight { padding-block: clamp(var(--space-8), 6vw, var(--space-10)); }
/* Avoid doubling the gap when a tight section directly follows a full section
   (e.g. About: values section -> timeline). Keep one section's worth of space. */
.section + .section--tight { padding-top: 0; }

/* ----------------------------- Site header ------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: var(--border-width) solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  min-height: 64px;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text);
}
.site-header__brand:hover { text-decoration: none; }
.site-header__brand img { height: 22px; width: auto; }

/* Transparent header blended into a dark hero (case-study pages) */
.site-header.over-dark {
  background: transparent;
  backdrop-filter: none;
  border-bottom: 0;
}
.site-header.over-dark .nav-toggle { color: var(--grey-00); }
@media (min-width: 640px) {
  .site-header.over-dark .primary-nav__link { color: rgba(255, 255, 255, 0.72); }
  .site-header.over-dark .primary-nav__link:hover,
  .site-header.over-dark .primary-nav__link[aria-current="page"] { color: var(--grey-00); }
  /* Keep the CTA high-contrast on the dark hero: invert to a light button. */
  .site-header.over-dark .primary-nav__cta,
  .site-header.over-dark .primary-nav__cta:hover { background: var(--grey-00); color: var(--grey-80); }
}

.primary-nav { display: flex; align-items: center; gap: var(--space-6); }

.primary-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.primary-nav__link {
  color: var(--color-text-muted);
  font-weight: var(--fw-medium);
  padding-block: var(--space-2);
  transition: color var(--transition-fast);
}
.primary-nav__link:hover { color: var(--color-text); text-decoration: none; }
.primary-nav__link[aria-current="page"] { color: var(--color-text); }

.primary-nav__actions { display: inline-flex; align-items: center; gap: var(--space-5); }
/* Two classes (.btn.primary-nav__cta) so this beats the base .btn padding,
   which otherwise wins on load order. */
.btn.primary-nav__cta { padding: 10px 16px; font-size: var(--fs-small); }

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  appearance: none;
  background: none;
  border: 0;
  padding: var(--space-2);
  cursor: pointer;
  color: var(--color-text);
}

@media (max-width: 639px) {
  .nav-toggle { display: inline-flex; }
  .primary-nav {
    position: fixed;
    inset: 64px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--color-bg);
    border-bottom: var(--border-width) solid var(--color-border);
    padding: var(--space-4) var(--gutter) var(--space-6);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base), transform var(--transition-base);
  }
  .primary-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .primary-nav__link {
    display: block;
    padding-block: var(--space-4);
    border-bottom: var(--border-width) solid var(--color-border);
    font-size: var(--fs-body-lg);
  }
  /* Stack the actions full width instead of the desktop inline row */
  .primary-nav__actions {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .btn.primary-nav__cta {
    width: 100%;
    justify-content: center;
    margin-top: var(--space-5);
    padding: 14px 16px;
    font-size: var(--fs-body);
  }
}

/* ----------------------------- Site footer ------------------------------- */
.site-footer {
  position: relative;
  z-index: 1;
  background: var(--color-bg-subtle);
  color: var(--color-text-muted);
  border-top: var(--border-width) solid var(--color-border);
  padding-block: var(--space-8);
  margin-top: var(--space-11);
}

/* When a page closes with the dark "More of my work" band, the footer should
   sit flush against it (no gap). */
main:has(.more-work) + .site-footer,
main:has(.cta-dark) + .site-footer { margin-top: 0; }

.site-footer__top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-6) var(--space-8);
}
.site-footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 34ch;
}
.site-footer__logo img { height: 24px; width: auto; display: block; }
.site-footer__tagline {
  font-size: var(--fs-small);
  line-height: var(--lh-normal);
  color: var(--color-text-muted);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-5);
  align-items: flex-start;
  font-size: var(--fs-small);
}
.footer-nav a { color: var(--color-text-muted); }
.footer-nav a:hover { color: var(--color-text); }

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-2) var(--space-5);
  margin-top: var(--space-7);
  padding-top: var(--space-5);
  border-top: var(--border-width) solid var(--color-border);
  font-size: var(--fs-caption);
}
.site-footer__copy,
.site-footer__note { color: var(--color-text-subtle); }

@media (max-width: 639px) {
  .site-footer__top { flex-direction: column; gap: var(--space-5); }
  .site-footer__bottom { flex-direction: column; gap: var(--space-1); }
}