/* =============================================================
   layout.css — Fase 8 · Header + Footer layout
   Mobile-first. Uses only CSS custom properties from design-tokens.css.
   Breakpoint md = 768px
   ============================================================= */

/* ---------------------------------------------------------------
   Skip link
--------------------------------------------------------------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
  z-index: 9999;
}

.skip-link:focus,
.skip-link:focus-visible {
  left: var(--sp-4);
  top: var(--sp-4);
  width: auto;
  height: auto;
  overflow: visible;
  background: var(--color-brand-bright);
  color: #fff;
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
}

/* ---------------------------------------------------------------
   Header
--------------------------------------------------------------- */
.hi-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-ink);
  color: var(--color-text-primary-dark);
  padding: var(--sp-3) 0;
  box-shadow: var(--shadow-md);
}

.hi-header__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--sp-6);
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-6);
}

/* ---------------------------------------------------------------
   Logo
--------------------------------------------------------------- */
.hi-logo {
  display: flex;
  flex-direction: row;
  gap: var(--sp-2);
  align-items: center;
  text-decoration: none;
  color: inherit;
  font-weight: 700;
}

.hi-logo img {
  display: block;
  border-radius: var(--radius-sm);
}

/* ---------------------------------------------------------------
   Desktop nav (hidden on mobile)
--------------------------------------------------------------- */
.hi-nav {
  display: none;
}

.hi-nav a {
  color: var(--color-text-primary-dark);
  text-decoration: none;
  padding: var(--sp-2);
  border-radius: var(--radius-sm);
  transition: color 0.15s;
}

.hi-nav a:hover {
  color: var(--color-brand-bright);
}

/* ---------------------------------------------------------------
   CTA area (hidden on mobile)
--------------------------------------------------------------- */
.hi-header__cta {
  display: none;
}

.hi-lang-soon {
  font-size: var(--fs-caption);
  color: var(--color-text-secondary-dark);
  opacity: 0.8;
  cursor: default;
}

.hi-header__cta .btn--ghost {
  color: var(--color-text-primary-dark);
}

/* ---------------------------------------------------------------
   Hamburger button (mobile only)
--------------------------------------------------------------- */
.hi-hamburger {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  padding: var(--sp-2);
  cursor: pointer;
}

.hi-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-primary-dark);
  border-radius: var(--radius-full);
  transition: transform 0.2s, opacity 0.2s;
}

/* ---------------------------------------------------------------
   Mobile drawer
--------------------------------------------------------------- */
.hi-drawer {
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  background: var(--color-ink);
  padding: var(--sp-4) var(--sp-6);
  border-top: 1px solid var(--color-border-dark);
  z-index: 99;
}

.hi-drawer[hidden] {
  display: none;
}

.hi-drawer nav {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.hi-drawer nav a {
  color: var(--color-text-primary-dark);
  text-decoration: none;
  padding: var(--sp-2) 0;
}

/* ---------------------------------------------------------------
   Footer
--------------------------------------------------------------- */
.hi-footer {
  background: var(--color-ink);
  color: var(--color-text-primary-dark);
  padding: var(--sp-12) var(--sp-6) var(--sp-6);
  margin-top: var(--sp-16);
}

.hi-footer__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-8);
}

.hi-footer__col h4 {
  font-size: var(--fs-body);
  font-weight: 600;
  margin: 0 0 var(--sp-3);
  color: var(--color-text-primary-dark);
}

.hi-footer__col ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.hi-footer__col a {
  color: var(--color-text-secondary-dark);
  text-decoration: none;
  font-size: var(--fs-body-sm);
}

.hi-footer__col a:hover {
  color: var(--color-brand-bright);
}

.hi-footer__col--brand p {
  color: var(--color-text-secondary-dark);
  font-size: var(--fs-body-sm);
  margin: var(--sp-3) 0;
}

.hi-footer__col address {
  font-style: normal;
  color: var(--color-text-secondary-dark);
  font-size: var(--fs-body-sm);
  line-height: 1.6;
}

.hi-footer__social {
  display: flex;
  gap: var(--sp-3);
  margin-top: var(--sp-3);
}

.hi-footer__social a {
  font-size: var(--fs-caption);
  color: var(--color-text-secondary-dark);
}

.hi-footer__bottom {
  max-width: 1200px;
  margin: var(--sp-8) auto 0;
  padding-top: var(--sp-4);
  border-top: 1px solid var(--color-border-dark);
  font-size: var(--fs-body-sm);
  color: var(--color-text-secondary-dark);
  text-align: center;
}

/* ---------------------------------------------------------------
   Desktop overrides — md breakpoint (768px+)
--------------------------------------------------------------- */
@media (min-width: 768px) {
  /* Show desktop nav */
  .hi-nav {
    display: flex;
    flex-direction: row;
    gap: var(--sp-6);
    font-size: var(--fs-body-sm);
    font-weight: 500;
  }

  /* Show desktop CTA */
  .hi-header__cta {
    display: flex;
    flex-direction: row;
    gap: var(--sp-3);
    align-items: center;
  }

  /* Hide hamburger on desktop */
  .hi-hamburger {
    display: none;
  }

  /* Never show drawer on desktop */
  .hi-drawer {
    display: none !important;
  }

  /* Footer 4-column grid */
  .hi-footer__inner {
    grid-template-columns: repeat(4, 1fr);
  }
}