/* ============================================================
   SockCustom — Header & Mega Menu
   Language: English (en) · Sticky · Hover-triggered Mega Menu
   ============================================================ */

.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  height: 4.8rem !important;
  min-height: 4.8rem !important;
  box-sizing: border-box;
  transition: box-shadow 250ms;
}
.header--scrolled { box-shadow: 0 2px 12px rgba(0,0,0,0.06); }

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ---------- Logo ---------- */
.header__logo {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 1.5rem; font-weight: 700; color: var(--color-primary);
  flex-shrink: 0;
  letter-spacing: -0.02em;
}
.header__logo-icon {
  width: 36px; height: 36px; background: var(--color-primary);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-white); font-size: 1rem; font-weight: 800;
}

/* ---------- Nav ---------- */
.header__nav { display: flex; align-items: center; height: 100%; margin: 0 auto; }
.header__nav-list { display: flex; align-items: center; height: 100%; gap: 0.25rem; }

.header__nav-item {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
}

.header__nav-link {
  display: flex; align-items: center; gap: 0.25rem;
  font: var(--font-nav);
  color: var(--color-text-body);
  padding: 0 1rem;
  height: 100%;
  position: relative;
  transition: color var(--transition-fast);
  white-space: nowrap;
}
.header__nav-link:hover,
.header__nav-link.active { color: var(--color-primary); }
.header__nav-link.active::after {
  content: ''; position: absolute; bottom: 0; left: 1rem; right: 1rem;
  height: 2px; background: var(--color-primary);
}
.header__nav-arrow {
  font-size: 0.6em; margin-left: 2px;
  transition: transform var(--transition-fast);
}
.header__nav-item:hover .header__nav-arrow { transform: rotate(180deg); }

/* ---------- CTA ---------- */
.header__cta {
  flex-shrink: 0;
  background: var(--color-primary); color: var(--color-white);
  font: var(--font-btn); padding: 0.625rem 1.375rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
  white-space: nowrap;
}
.header__cta:hover { background: var(--color-primary-light); }

/* ---------- Mobile Toggle ---------- */
.header__toggle {
  display: none; flex-direction: column; gap: 5px;
  width: 28px; height: 20px; justify-content: center;
  background: none; border: none; cursor: pointer; padding: 0;
}
.header__toggle span {
  display: block; width: 100%; height: 2px;
  background: var(--color-primary); border-radius: 2px;
  transition: transform 250ms, opacity 250ms;
}
.header__toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.header__toggle.active span:nth-child(2) { opacity: 0; }
.header__toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ================================================================
   MEGA MENU — Dropdown (hover triggered, 2 columns)
   ================================================================ */
.mega-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-mega);
  width: max-content;
  min-width: 700px;
  max-width: 900px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 200ms var(--ease-out), transform 200ms var(--ease-out), visibility 0ms 200ms;
}
.header__nav-item:hover .mega-menu {
  opacity: 1; visibility: visible; pointer-events: auto;
  transform: translateX(-50%) translateY(0);
  transition: opacity 200ms var(--ease-out), transform 200ms var(--ease-out), visibility 0ms;
}

.mega-menu__inner {
  display: flex; padding: 1.5rem; gap: 2rem; align-items: flex-start;
}

/* Left Column: Top Sellers (golden ratio wider) */
.mega-menu__sellers { flex: 1.618; border-right: 1px solid var(--color-border); padding-right: 2rem; }
.mega-menu__label {
  font-size: 0.6875rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--color-text-light); margin-bottom: 1rem;
}
.mega-menu__sellers-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
.mega-menu__seller {
  display: flex; flex-direction: column; align-items: center; text-align: center;
  padding: 0.625rem; border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}
.mega-menu__seller:hover { background: var(--color-bg-light); }
.mega-menu__seller-img {
  width: 140px; height: 140px; object-fit: cover; border-radius: var(--radius-sm);
  margin-bottom: 0.5rem; background: var(--color-bg-light);
}
.mega-menu__seller-name { font-size: 0.8125rem; font-weight: 500; color: var(--color-text-body); line-height: 1.2; margin-bottom: 2px; }
.mega-menu__seller-price { font-size: 0.75rem; font-weight: 600; color: var(--color-text-muted); }

/* Right Column: Keyword Tag Pills (golden ratio narrow) */
.mega-menu__links { flex: 1; }
.mega-menu__links-list { display: flex; flex-wrap: wrap; gap: 0.5rem; align-content: flex-start; }
.mega-menu__link {
  display: inline-flex; align-items: center; gap: 0.25rem;
  padding: 0.375rem 0.75rem; border-radius: 6px;
  border: 1px solid var(--color-border);
  font-size: 0.8125rem; font-weight: 500; color: var(--color-text-body);
  background: var(--color-white);
  transition: all var(--transition-fast);
}
.mega-menu__link:hover {
  background: var(--color-primary); color: var(--color-white);
  border-color: var(--color-primary);
}
.mega-menu__link--all {
  margin-top: 0.75rem; padding: 0.625rem 1.25rem;
  border: none; border-radius: var(--radius-sm);
  font-weight: 600; font-size: 0.875rem;
  background: var(--color-primary); color: var(--color-white);
  display: inline-flex; align-items: center; gap: 6px;
}
.mega-menu__link--all::after { content: '→'; transition: transform var(--transition-fast); }
.mega-menu__link--all:hover { background: var(--color-primary-light); }
.mega-menu__link--all:hover::after { transform: translateX(3px); }

/* Mega Menu Bottom Banner */
.mega-menu__banner {
  border-top: 1px solid var(--color-border); background: var(--color-bg-light);
  padding: 0.75rem 1.5rem; border-radius: 0 0 var(--radius-md) var(--radius-md);
  display: flex; align-items: center; justify-content: center; gap: 2rem;
  font-size: 0.8125rem; color: var(--color-text-muted);
  flex-wrap: wrap;
}
.mega-menu__banner-item { display: flex; align-items: center; gap: 0.375rem; }
.mega-menu__banner-item span { font-weight: 600; color: var(--color-text-body); }
.mega-menu__banner .btn--sm { margin-left: 1rem; }

/* ---------- Mobile Nav Overlay ---------- */
.mobile-nav {
  display: none; position: fixed; inset: 0; top: 4.8rem;
  background: var(--color-white); z-index: 999;
  overflow-y: auto; padding: 1.5rem;
}
.mobile-nav.active { display: block; }
.mobile-nav__item { border-bottom: 1px solid var(--color-border); }
.mobile-nav__link {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; padding: 1rem 0; font-size: 1rem; font-weight: 500; color: var(--color-text-body);
}
.mobile-nav__sub { padding: 0 0 0.75rem 1rem; display: none; }
.mobile-nav__sub.active { display: block; }
.mobile-nav__sub a {
  display: block; padding: 0.5rem 0; font-size: 0.9375rem; color: var(--color-text-muted);
}
.mobile-nav__sub a:hover { color: var(--color-primary); }
.mobile-nav__seller { display: none; } /* hide top sellers on mobile */
.mobile-nav__cta { margin-top: 1.5rem; width: 100%; text-align: center; }

@media (max-width: 1024px) {
  .header__nav, .header__cta { display: none; }
  .header__toggle { display: flex; }
  .header__inner { justify-content: space-between; }
}

@media (max-width: 768px) {
  .header__logo { font-size: 1.25rem; }
  .header__logo-icon { width: 30px; height: 30px; font-size: 0.8125rem; }
}