/* ============================================================
   LAYOUT — header (PC + mobile), nav, footer
   Two distinct layouts toggled by CSS only:
     .pc-head   -> shown >= 1024px
     .wap-head  -> shown  < 1024px
   ============================================================ */

/* ---------- PC header ---------- */
.pc-head {
  display: none;
  position: sticky; top: 0; z-index: 100;
  height: var(--header-h);
  background: rgba(27,10,14, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-base), background var(--transition-base);
}
.pc-head.scrolled { box-shadow: 0 6px 24px rgba(0,0,0,0.45); background: rgba(14,4,6, 0.95); }
.pc-head__inner {
  max-width: var(--max-width); margin-inline: auto; height: 100%;
  padding-inline: var(--space-6);
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-4);
}
.brand { display: flex; align-items: center; gap: var(--space-3); flex-shrink: 0; }
.brand img { height: 64px; width: auto; filter: drop-shadow(0 2px 8px rgba(0,0,0,0.5)); }

.pc-nav { display: flex; align-items: center; gap: var(--space-1); }
.pc-nav .tab {
  font-family: var(--font-display); font-weight: 600; font-size: var(--text-base);
  padding: var(--space-2) var(--space-3); border-radius: var(--radius-full);
  color: var(--color-text-muted); transition: color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
}
.pc-nav .tab:hover { color: var(--color-text); }
.pc-nav .tab.active, .pc-nav .tab[aria-current="page"] {
  color: var(--color-on-primary); background: var(--color-primary);
}
.pc-nav .btn { margin-left: var(--space-2); }

/* ---------- Mobile header ---------- */
.wap-head {
  display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 100;
  height: var(--header-h); padding-inline: var(--space-4);
  background: rgba(27,10,14, 0.9); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}
.wap-head.scrolled { box-shadow: 0 6px 24px rgba(0,0,0,0.45); }
.wap-head .brand img { height: 56px; }
.hamburger {
  display: inline-flex; flex-direction: column; gap: 5px; padding: var(--space-2);
  border-radius: var(--radius-sm);
}
.hamburger span { width: 24px; height: 2px; background: var(--color-text); border-radius: 2px; transition: transform var(--transition-fast), opacity var(--transition-fast); }

/* Mobile offcanvas nav */
.mobile-nav {
  position: fixed; inset: 0 0 0 auto; width: min(78vw, 320px);
  background: var(--color-surface); border-left: 1px solid var(--color-border);
  transform: translateX(100%); transition: transform var(--transition-base);
  z-index: 200; padding: var(--space-8) var(--space-6); display: flex; flex-direction: column; gap: var(--space-2);
  box-shadow: var(--shadow-card);
}
.mobile-nav.open { transform: translateX(0); }
.mobile-nav a {
  font-family: var(--font-display); font-weight: 600; font-size: var(--text-lg);
  padding: var(--space-3) var(--space-4); border-radius: var(--radius-md);
  color: var(--color-text-muted);
}
.mobile-nav a:hover, .mobile-nav a[aria-current="page"] { background: var(--color-surface-2); color: var(--color-text); }
.mobile-nav__close { align-self: flex-end; font-size: var(--text-2xl); line-height: 1; color: var(--color-text-muted); padding: var(--space-2); }
.mobile-nav .btn { margin-top: var(--space-4); }

.nav-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,0.55); z-index: 150;
  opacity: 0; visibility: hidden; transition: opacity var(--transition-base), visibility var(--transition-base);
}
.nav-backdrop.open { opacity: 1; visibility: visible; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  padding-block: var(--space-16) var(--space-8);
  margin-top: var(--space-16);
}
.footer-grid {
  display: grid; gap: var(--space-8);
  grid-template-columns: 1fr;
}
.footer-brand img { height: 60px; margin-bottom: var(--space-4); }
.footer-brand p { color: var(--color-text-muted); font-size: var(--text-sm); max-width: 44ch; }
.footer-col h4 { font-size: var(--text-sm); text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-primary); margin-bottom: var(--space-4); }
.footer-col ul { display: flex; flex-direction: column; gap: var(--space-2); }
.footer-col a { color: var(--color-text-muted); font-size: var(--text-sm); transition: color var(--transition-fast); }
.footer-col a:hover { color: var(--color-text); }

.footer-legal {
  margin-top: var(--space-12); padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex; flex-direction: column; gap: var(--space-3);
  align-items: center; text-align: center;
}
.footer-legal .responsible {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-size: var(--text-xs); color: var(--color-gold); font-weight: 600;
  border: 1px solid var(--color-border); border-radius: var(--radius-full);
  padding: var(--space-1) var(--space-3);
}
.footer-legal p { color: var(--color-text-muted); font-size: var(--text-sm); }
.footer-links { display: flex; flex-wrap: wrap; gap: var(--space-4); justify-content: center; }
.footer-links a { color: var(--color-text-muted); font-size: var(--text-sm); }
.footer-links a:hover { color: var(--color-primary); }

@media (min-width: 768px) {
  .footer-grid { grid-template-columns: 1.6fr 1fr 1fr; }
  .footer-legal { flex-direction: row; justify-content: space-between; text-align: left; }
}

/* ---------- Layout switch ---------- */
@media (min-width: 1024px) {
  .pc-head { display: block; }
  .wap-head, .mobile-nav, .nav-backdrop { display: none; }
}