/* ============================================================
   NexSub Layout — header, footer, grid, responsive
   ============================================================ */

/* ── Header ──────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  height: var(--header-height);
  display: flex;
  align-items: center;
  background: rgba(14, 10, 25, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--duration-base);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

/* ── Header: left section ───────────────────────────── */
.header__left {
  display: flex;
  align-items: center;
  gap: var(--space-10);
}

/* ── Logo image ─────────────────────────────────────── */
.logo-img {
  height: 36px;
  width: auto;
  display: block;
}
@media (max-width: 768px) {
  .logo-img { height: 30px; }
}

/* ── Main nav ────────────────────────────────────────── */
.main-nav {
  display: flex;
  align-items: center;
}

.main-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.main-nav__link {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--text-muted);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  transition:
    color var(--duration-fast),
    background var(--duration-fast);
}

.main-nav__link:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.main-nav__link.active {
  color: var(--nav-pill-active-text);
  background: var(--nav-pill-active-bg);
}

/* Dropdown (Redeem) */
.main-nav__item--dropdown {
  position: relative;
}

.main-nav__dropdown {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-2);
  min-width: 180px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-fast) var(--ease-out);
  box-shadow: var(--shadow-lg);
}

.main-nav__item--dropdown:hover .main-nav__dropdown,
.main-nav__item--dropdown:focus-within .main-nav__dropdown {
  opacity: 1;
  pointer-events: auto;
}

.main-nav__dropdown-link {
  display: block;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--text-muted);
  transition: background var(--duration-fast), color var(--duration-fast);
}

.main-nav__dropdown-link:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
}

/* ── Header: right section ──────────────────────────── */
.header__right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* ── Header avatar (logged-in state) ──────────────── */
.header-avatar {
  display: flex; align-items: center; gap: var(--space-2);
  text-decoration: none; border-radius: var(--radius-full);
  padding: var(--space-1) var(--space-3) var(--space-1) var(--space-1);
  transition: background var(--duration-fast);
}
.header-avatar:hover { background: rgba(255,255,255,0.06); }
.header-avatar__circle {
  width: 32px; height: 32px; border-radius: var(--radius-full);
  background: var(--accent-primary); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-heading); font-size: var(--text-xs); font-weight: var(--weight-bold);
  flex-shrink: 0;
}
.header-avatar__name {
  font-size: var(--text-sm); color: var(--text-secondary);
  max-width: 120px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

/* ── Hamburger (mobile) ─────────────────────────────── */
.hamburger {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  transition: background var(--duration-fast), color var(--duration-fast);
}

.hamburger:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
}

.hamburger__line {
  position: relative;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: background var(--duration-fast);
}

.hamburger__line::before,
.hamburger__line::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform var(--duration-base) var(--ease-out);
}

.hamburger__line::before { top: -6px; }
.hamburger__line::after  { top:  6px; }

/* Hamburger open state */
.hamburger.is-open .hamburger__line {
  background: transparent;
}

.hamburger.is-open .hamburger__line::before {
  transform: translateY(6px) rotate(45deg);
}

.hamburger.is-open .hamburger__line::after {
  transform: translateY(-6px) rotate(-45deg);
}

/* ── Mobile nav (slide-in) ──────────────────────────── */
.mobile-nav {
  position: fixed;
  top: var(--header-height);
  right: 0;
  bottom: 0;
  width: 320px;
  max-width: 85vw;
  background: var(--bg-card);
  border-left: 1px solid var(--border-subtle);
  z-index: var(--z-dropdown);
  padding: var(--space-6);
  transform: translateX(100%);
  transition: transform var(--duration-base) var(--ease-out);
  overflow-y: auto;
}

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

.mobile-nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.mobile-nav__link {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  color: var(--text-muted);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  transition: background var(--duration-fast), color var(--duration-fast);
}

.mobile-nav__link:hover,
.mobile-nav__link.active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

.mobile-nav__link.active {
  background: rgba(104, 83, 193, 0.15);
  color: var(--accent-primary-hover);
}

.mobile-nav__cta {
  margin-top: var(--space-4);
}

/* Mobile nav backdrop */
.mobile-nav-backdrop {
  position: fixed;
  inset: 0;
  top: var(--header-height);
  background: rgba(0, 0, 0, 0.50);
  z-index: calc(var(--z-dropdown) - 1);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-out);
}

.mobile-nav-backdrop.is-open {
  opacity: 1;
  pointer-events: auto;
}

/* ── Footer ──────────────────────────────────────────── */
.site-footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border-subtle);
  padding-top: var(--space-16);
  padding-bottom: var(--space-8);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

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

.footer__social {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-default);
  color: var(--text-muted);
  transition: border-color var(--duration-fast), color var(--duration-fast), background var(--duration-fast);
}

.footer__social-link:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary-hover);
  background: rgba(104, 83, 193, 0.10);
}

.footer__social-link svg {
  width: 16px;
  height: 16px;
}

.footer__col-title {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer__links a {
  font-size: var(--text-sm);
  color: var(--text-muted);
  transition: color var(--duration-fast);
}

.footer__links a:hover {
  color: var(--text-link-hover);
}

/* Payment trust bar */
.footer__trust {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--space-6) 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: var(--space-8);
}

.footer__trust-label {
  font-size: var(--text-xs);
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.footer__trust-icons {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.footer__trust-icon {
  width: 28px;
  height: 28px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  object-fit: contain;
}

/* Bottom bar */
.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  text-align: center;
}

.footer__copyright {
  font-size: var(--text-xs);
  color: var(--text-dim);
}

.footer__tagline {
  font-size: var(--text-xs);
  color: var(--text-dim);
}

/* ── Two-column grid (features) ──────────────────────── */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

/* ── Three-column grid (testimonials, pricing) ───────── */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

/* ── Four-column grid ────────────────────────────────── */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

/* ── Responsive: Tablet (≤1024px) ────────────────────── */
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
}

/* ── Responsive: Mobile (≤768px) ─────────────────────── */
@media (max-width: 768px) {
  .main-nav {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .header__right .btn {
    display: none;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .grid-4 {
    grid-template-columns: 1fr;
  }

  h1 { font-size: var(--text-4xl); }
  h2 { font-size: var(--text-3xl); }
  h3 { font-size: var(--text-2xl); }

  .product-detail-grid {
    grid-template-columns: 1fr !important;
    gap: var(--space-6) !important;
  }

  .product-detail-img-wrap {
    max-height: 220px !important;
  }

  .product-detail-img {
    max-height: 200px !important;
  }

  .section { padding-top: var(--space-12); padding-bottom: var(--space-12); }
  .section--lg { padding-top: var(--space-16); padding-bottom: var(--space-16); }

  .container {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }
}

/* ── Responsive: Small mobile (≤600px) ───────────────── */
@media (max-width: 600px) {
  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }

  .footer__trust {
    flex-direction: column;
    gap: var(--space-4);
  }
}