/* ============================================================
   MEMTEST INDUSTRIAL — Site Header / Navigation
   ============================================================ */

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding-block: 1.1rem;
  background: rgba(13,14,16,0.55);
  backdrop-filter: blur(14px) saturate(1.1);
  border-bottom: 1px solid transparent;
  transition: background var(--t-med) var(--ease-out), border-color var(--t-med) var(--ease-out), padding var(--t-med) var(--ease-out);
}
.site-header.is-scrolled {
  background: rgba(13,14,16,0.92);
  border-bottom-color: var(--ink-line);
  padding-block: 0.8rem;
}
.site-header__inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 2rem;
}

/* Brand */
.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.brand__mark {
  width: 36px; height: 36px;
  display: grid; place-items: center;
  border: 1px solid var(--copper);
  position: relative;
}
.brand__mark svg { width: 22px; height: 22px; }
.brand__mark::before, .brand__mark::after {
  content: "";
  position: absolute;
  width: 4px; height: 4px;
  background: var(--copper);
}
.brand__mark::before { top: -2px; left: -2px; }
.brand__mark::after { bottom: -2px; right: -2px; }
.brand__name {
  display: flex;
  flex-direction: column;
  line-height: 1;
}
.brand__name b { color: var(--paper); font-weight: 500; font-size: 0.95rem; }
.brand__name span {
  font-size: 0.62rem;
  color: var(--paper-faint);
  letter-spacing: 0.2em;
  margin-top: 4px;
}

/* Primary nav */
.primary-nav {
  justify-self: center;
}
.primary-nav ul {
  display: flex;
  gap: 1.25rem;
}
.primary-nav a {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--paper-dim);
  position: relative;
  padding: 0.4em 0;
  white-space: nowrap;
  transition: color var(--t-fast) var(--ease-out);
}
.primary-nav a::after {
  content: "";
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 1px;
  background: var(--copper);
  transition: width var(--t-med) var(--ease-out);
}
.primary-nav a:hover, .primary-nav a.is-active { color: var(--paper); }
.primary-nav a:hover::after, .primary-nav a.is-active::after { width: 100%; }

/* Header actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.header-status {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--paper-faint);
  display: flex;
  align-items: center;
  gap: 0.5em;
}
.header-status::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--signal-ok);
  box-shadow: 0 0 8px var(--signal-ok);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* Language switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--ink-line);
  background: var(--ink-raised);
}
.lang-switcher__item {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--paper-faint);
  padding: 0.65em 1.1em;
  border-right: 1px solid var(--ink-line);
  transition: color var(--t-fast) var(--ease-out), background var(--t-fast) var(--ease-out);
}
@media (max-width: 880px) {
  .lang-switcher__item { padding: 0.85em 1.2em; }
}
.lang-switcher__item:last-child { border-right: none; }
.lang-switcher__item:hover { color: var(--paper); }
.lang-switcher__item.is-active {
  background: var(--copper);
  color: var(--ink-void);
}

/* Theme toggle */
.theme-toggle {
  width: 36px; height: 36px;
  display: grid; place-items: center;
  border: 1px solid var(--ink-line);
  background: var(--ink-raised);
  color: var(--paper-dim);
  transition: color var(--t-fast) var(--ease-out), border-color var(--t-fast) var(--ease-out), background var(--t-fast) var(--ease-out);
}
.theme-toggle:hover { color: var(--paper); border-color: var(--copper); }
.theme-toggle svg { width: 16px; height: 16px; }

.btn-nav-cta {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.8em 1.3em;
  background: var(--copper);
  color: var(--ink-void);
  border: 1px solid var(--copper);
  transition: background var(--t-fast) var(--ease-out);
}
.btn-nav-cta:hover { background: var(--copper-bright); }

/* Mobile toggle */
.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  border: 1px solid var(--ink-line);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span {
  width: 18px; height: 1.5px;
  background: var(--paper);
  transition: transform var(--t-fast) var(--ease-out), opacity var(--t-fast) var(--ease-out);
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

@media (max-width: 980px) {
  .header-actions .header-status { display: none; }
}
@media (max-width: 880px) {
  .site-header__inner { grid-template-columns: 1fr auto; }
  .header-actions { gap: 0.5rem; }
  .primary-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    background: var(--ink-void);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transform: translateX(100%);
    visibility: hidden;
    pointer-events: none;
    transition: transform var(--t-med) var(--ease-out), visibility var(--t-med) var(--ease-out);
    z-index: 99;
  }
  .primary-nav.is-open {
    transform: translateX(0);
    visibility: visible;
    pointer-events: auto;
  }
  .primary-nav ul {
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    text-align: center;
    width: 100%;
    padding: 0;
  }
  .primary-nav li { width: 100%; }
  .primary-nav a {
    display: block;
    font-size: 1.125rem;
    padding: 0.8em 1.5em;
    letter-spacing: 0;
    text-transform: none;
    width: 100%;
  }
  .nav-toggle { display: flex; order: 2; }
  .btn-nav-cta { display: none; }
}
@media (max-width: 480px) {
  .header-actions { gap: 0.35rem; }
  .site-header { padding-block: 0.8rem; }
  .header-search-btn { display: none; }
  .theme-toggle { display: none; }
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  background: var(--ink-void);
  border-top: 1px solid var(--ink-line);
  padding-block: clamp(3rem, 6vw, 5rem) 2rem;
  position: relative;
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--copper) 50%, transparent 100%);
  opacity: 0.5;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 4rem;
}
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 1.5rem;
  font-weight: 400;
}
.footer-col ul { display: flex; flex-direction: column; gap: 0.8rem; }
.footer-col a {
  color: var(--paper-dim);
  font-size: var(--fs-small);
  transition: color var(--t-fast) var(--ease-out), padding var(--t-fast) var(--ease-out);
}
.footer-col a:hover { color: var(--copper-bright); padding-left: 0.5rem; }
.footer-brand p {
  color: var(--paper-dim);
  font-size: var(--fs-small);
  max-width: 32ch;
  margin-top: 1rem;
  line-height: 1.6;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid var(--ink-line);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--paper-faint);
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-bottom a:hover { color: var(--copper); }

@media (max-width: 880px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2.5rem; }
}
@media (max-width: 640px) {
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ============================================================
   Cart Button & Badge
   ============================================================ */
.header-cart-btn {
  position: relative;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  color: var(--paper-dim);
  transition: color var(--t-fast) var(--ease-out);
}
.header-cart-btn:hover { color: var(--paper); }
.cart-badge {
  position: absolute;
  top: 2px;
  right: 2px;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  border-radius: 8px;
  background: var(--copper);
  color: var(--ink-void);
  font-size: 10px;
  line-height: 16px;
  text-align: center;
  font-weight: 600;
  font-family: var(--font-mono);
  pointer-events: none;
}

/* Cart toast notification */
.cart-toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--ink-raised);
  color: var(--paper);
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  border: 1px solid var(--ink-line);
  font-size: var(--fs-small);
  z-index: 9999;
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
  animation: toast-in 0.2s ease-out;
}
@keyframes toast-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}