/* ==========================================================================
   Instant Gamers - Layout: Header, Navigation, Drawer & Footer
   ========================================================================== */

/* --- Sticky Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.96);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition: box-shadow var(--transition-fast), background-color var(--transition-fast);
}

.site-header.scrolled {
  box-shadow: 0 6px 24px rgba(15, 23, 42, 0.12);
}

.header-inner {
  height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

/* Brand Logo */
.site-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.site-brand img {
  height: 48px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.25));
}

/* Desktop Nav Menu */
.desktop-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.desktop-nav a {
  position: relative;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-muted);
  padding: 8px 0;
  transition: color var(--transition-fast);
}

.desktop-nav a:hover,
.desktop-nav a.active {
  color: var(--color-primary);
}

.desktop-nav a.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: var(--radius-pill);
}

/* Header Action & Mobile Toggle */
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  width: 42px;
  height: 42px;
  padding: 9px;
  cursor: pointer;
  color: var(--color-text-main);
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast);
}

.menu-toggle:hover {
  background-color: var(--color-surface-muted);
}

.menu-toggle svg {
  width: 22px;
  height: 22px;
}

/* --- Mobile Drawer --- */
.mobile-drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(6, 21, 45, 0.55);
  backdrop-filter: blur(4px);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.mobile-drawer-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.mobile-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(340px, 85vw);
  background: #ffffff;
  z-index: 999;
  box-shadow: -8px 0 32px rgba(6, 21, 45, 0.2);
  transform: translateX(100%);
  transition: transform var(--transition-normal) cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
}

.mobile-drawer.open {
  transform: translateX(0);
}

.drawer-header {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-border-subtle);
}

.drawer-close {
  background: transparent;
  border: 0;
  cursor: pointer;
  padding: 8px;
  color: var(--color-text-muted);
}

.drawer-nav {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  flex: 1;
  overflow-y: auto;
}

.drawer-nav a {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-main);
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border-subtle);
}

.drawer-nav a:hover,
.drawer-nav a.active {
  color: var(--color-primary);
}

.drawer-footer {
  padding: 20px 24px;
  border-top: 1px solid var(--color-border-subtle);
}

/* --- Footer --- */
.site-footer {
  background-color: var(--color-navy-900);
  color: var(--color-text-light);
  padding: 70px 0 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 50px;
}

.footer-brand p {
  color: #9db2ce;
  font-size: 13.5px;
  line-height: 1.6;
  max-width: 360px;
  margin-top: 16px;
}

.footer-links h4 {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #ffffff;
  margin-bottom: 18px;
}

.footer-links ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.footer-links a {
  font-size: 13.5px;
  color: #9db2ce;
}

.footer-links a:hover {
  color: var(--color-accent-light);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 12.5px;
  color: #7d93b1;
}

.responsible-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: #b5c7e0;
}

.responsible-tag span {
  display: inline-block;
  padding: 2px 6px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 4px;
  font-size: 11px;
  color: #fff;
}

/* Responsive Media Queries */
@media (max-width: 1050px) {
  .desktop-nav {
    display: none;
  }
  .menu-toggle {
    display: flex;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 600px) {
  .header-actions .btn-header-cta {
    display: none;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}