/* ============================================
   LAYOUT — container, header, footer
   ============================================ */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-header-bg);
  backdrop-filter: blur(8px);
  border-bottom: var(--border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  max-width: var(--max-width);
  margin: 0 auto;
}

.site-header__brand {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--color-ink);
  text-decoration: none;
  letter-spacing: 0.01em;
  line-height: 1.2;
  max-width: 60%;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.brand-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  object-fit: contain;
  background: var(--color-accent-soft);
  border-radius: 10px;
  padding: 4px;
}

.site-nav ul {
  display: flex;
  gap: var(--space-3);
}

.site-nav a {
  color: var(--color-ink-soft);
  text-decoration: none;
  font-size: var(--fs-small);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.site-nav a:hover { color: var(--color-accent); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: var(--space-1);
}

section {
  padding: var(--space-6) 0;
}

section.alt {
  background: var(--color-bg-alt);
}

.site-footer {
  border-top: var(--border);
  padding: var(--space-4) 0 var(--space-3);
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-3);
}

.footer-brand {
  display: inline-flex;
  align-items: center;
}

.footer-brand img {
  display: block;
  width: auto;
  max-width: 320px;
  height: auto;
  opacity: 0.9;
}

.footer-notes {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  text-align: center;
}

.footer-note {
  max-width: 42ch;
  font-size: var(--fs-small);
  color: var(--color-ink-soft);
}

@media (max-width: 720px) {
  .site-nav {
    position: fixed;
    inset: 64px 0 auto 0;
    background: var(--color-nav-bg);
    border-bottom: var(--border);
    padding: var(--space-2) var(--space-3);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--duration) var(--ease), transform var(--duration) var(--ease);
  }
  .site-nav.is-open { opacity: 1; transform: translateY(0); pointer-events: auto; }
  .site-nav ul { flex-direction: column; gap: var(--space-2); }
  .nav-toggle { display: block; }
  section { padding: var(--space-5) 0; }
  .site-footer__inner { flex-direction: column; align-items: center; }
}

@media (max-width: 560px) {
  .site-header__brand {
    font-size: 1rem;
    max-width: 52%;
  }

  .site-header__inner {
    padding: var(--space-2);
  }

  .container {
    padding: 0 var(--space-2);
  }
}