/* ==========================================================================
   Layout — structural grid systems for header, footer and page sections
   ========================================================================== */

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

/* ---- Site header ---- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(246, 245, 242, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-line);
}

.site-header__inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  column-gap: var(--space-md);
  padding-block: var(--space-sm);
}

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

.site-header__logo {
  width: 36px;
  height: 36px;
  object-fit: contain;
}

.site-header__name {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.1;
}

.site-header__name span {
  display: block;
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--color-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-header__nav {
  justify-self: end;
}

/* ---- Page hero ---- */

.hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  padding-block: var(--space-2xl) var(--space-xl);
}

@media (min-width: 900px) {
  .hero--split {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
  }
}

/* ---- General section rhythm ---- */

.section {
  padding-block: var(--space-2xl);
}

.section--tight {
  padding-block: var(--space-xl);
}

.section--surface {
  background: var(--color-surface);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.section__head {
  display: grid;
  gap: var(--space-sm);
  max-width: 640px;
  margin-bottom: var(--space-xl);
}

/* ---- Grid utilities for content ---- */

.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid--2 {
  grid-template-columns: 1fr;
}

.grid--3 {
  grid-template-columns: 1fr;
}

.grid--4 {
  grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 700px) {
  .grid--2 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 900px) {
  .grid--4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

.split {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1fr;
  align-items: center;
}

@media (min-width: 900px) {
  .split {
    grid-template-columns: 1fr 1fr;
  }
  .split--reverse .split__media {
    order: 2;
  }
}

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

.site-footer {
  background: var(--color-ink);
  color: #d8dadd;
  padding-block: var(--space-xl) var(--space-lg);
}

.site-footer a {
  color: #d8dadd;
}

.site-footer__grid {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1fr;
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

@media (min-width: 700px) {
  .site-footer__grid {
    grid-template-columns: 1.4fr 1fr 1fr;
  }
}

.site-footer__bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding-top: var(--space-lg);
  font-size: 0.85rem;
  color: #9aa0a8;
}

@media (min-width: 700px) {
  .site-footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.site-footer__legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}