/**
 * Layout CSS — Navigation, Footer, Grids
 */

/* ── Navigation ───────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: rgba(9,9,11,0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--color-border);
  z-index: var(--z-sticky);
  transition: background var(--transition-base);
}

.nav__inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  height: 100%;
  max-width: var(--container-2xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}
.nav__logo-text {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--font-weight-extrabold);
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
}
.nav__logo-text span { color: var(--color-accent); }

.nav__search { flex: 1; max-width: 480px; position: relative; }

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-left: auto;
}
.nav__link {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background var(--transition-fast);
}
.nav__link:hover, .nav__link.active { color: var(--color-text-primary); background: rgba(255,255,255,0.05); }

.nav__cta { display: flex; align-items: center; gap: var(--space-2); }

/* Mobile hamburger */
.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--space-2);
  background: none;
  border: none;
  margin-left: auto;
}
.nav__burger span {
  width: 22px; height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
  display: block;
}

/* Mobile nav drawer */
.nav__mobile {
  position: fixed;
  top: var(--nav-height); left: 0; right: 0;
  background: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4);
  z-index: var(--z-sticky);
  transform: translateY(-100%);
  opacity: 0;
  transition: transform var(--transition-base), opacity var(--transition-base);
  pointer-events: none;
}
.nav__mobile.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: all;
}
.nav__mobile-links { display: flex; flex-direction: column; gap: var(--space-1); margin-bottom: var(--space-4); }
.nav__mobile-link {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}
.nav__mobile-link:hover { background: rgba(255,255,255,0.05); color: var(--color-text-primary); }

/* Page offset for fixed nav */
.page-body { padding-top: var(--nav-height); }

/* ── Product Grid ─────────────────────────────── */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-6);
}

@media (max-width: 640px) {
  .products-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-3); }
}
@media (max-width: 400px) {
  .products-grid { grid-template-columns: 1fr; }
}

/* ── Category Grid ───────────────────────────── */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: var(--space-4);
}

.category-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}
.category-card:hover {
  border-color: var(--color-accent-border);
  background: var(--color-accent-bg);
  transform: translateY(-3px);
  box-shadow: var(--shadow-accent);
}
.category-card__icon { font-size: 2rem; }
.category-card__name {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}
.category-card__count { font-size: var(--text-xs); color: var(--color-text-muted); }

/* ── Filter Sidebar ──────────────────────────── */
.filter-sidebar {
  width: 240px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.filter-group__title {
  font-size: var(--text-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

/* ── Footer ───────────────────────────────────── */
.footer {
  background: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  padding: var(--space-16) 0 var(--space-8);
  margin-top: var(--space-24);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer__brand-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
  margin-top: var(--space-3);
  max-width: 280px;
}

.footer__heading {
  font-size: var(--text-xs);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.footer__links { display: flex; flex-direction: column; gap: var(--space-2); }
.footer__link {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}
.footer__link:hover { color: var(--color-accent); }

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  gap: var(--space-4);
  flex-wrap: wrap;
}
.footer__copy { font-size: var(--text-sm); color: var(--color-text-muted); }
.footer__bottom-links { display: flex; gap: var(--space-4); }

/* Newsletter */
.newsletter {
  background: linear-gradient(135deg, var(--color-bg-card) 0%, var(--color-bg-elevated) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-12);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.newsletter::before {
  content: '';
  position: absolute;
  top: -60px; right: -60px;
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(245,158,11,0.1) 0%, transparent 70%);
  border-radius: 50%;
}
.newsletter__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: var(--font-weight-extrabold);
  margin-bottom: var(--space-2);
}
.newsletter__subtitle { color: var(--color-text-secondary); font-size: var(--text-base); margin-bottom: var(--space-6); }
.newsletter__form {
  display: flex;
  gap: var(--space-3);
  max-width: 480px;
  margin: 0 auto;
}
.newsletter__input {
  flex: 1;
  padding: 0.75rem 1.25rem;
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-primary);
  font-size: var(--text-base);
}
.newsletter__input:focus { border-color: var(--color-accent); outline: none; }

/* ── Responsive Breakpoints ──────────────────── */
@media (max-width: 1024px) {
  .footer__grid { grid-template-columns: 1fr 1fr; gap: var(--space-8); }
  .nav__search  { display: none; }
}

@media (max-width: 768px) {
  .nav__links, .nav__cta { display: none; }
  .nav__burger { display: flex; }
  .footer__grid { grid-template-columns: 1fr; gap: var(--space-6); }
  .newsletter__form { flex-direction: column; }
  .section-title { font-size: var(--text-2xl); }
}

@media (max-width: 640px) {
  .categories-grid { grid-template-columns: repeat(2, 1fr); }
  .container { padding: 0 var(--space-4); }
}