/* Header styles for ModernFitStore */

.mf-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(15, 23, 33, 0.96), rgba(15, 23, 33, 0.92));
  border-bottom: 1px solid var(--color-border-subtle);
}

.mf-header__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
}

/* Brand / Logo */

.mf-header__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-serif);
  font-size: var(--font-size-lg);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.mf-header__logo-mark {
  width: 30px;
  height: 30px;
  border-radius: 999px;
  background: conic-gradient(from 160deg, var(--color-sand), var(--color-olive-muted), var(--color-primary));
  box-shadow: 0 0 0 1px rgba(148, 163, 184, 0.5);
}

.mf-header__logo-text {
  white-space: nowrap;
}

/* Navigation */

.mf-header__nav {
  display: flex;
}

.mf-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
  margin: 0;
  padding: 0;
}

.mf-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-sm);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gray-200);
}

.mf-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 0;
  height: 1px;
  background: linear-gradient(to right, var(--color-sand), var(--color-olive-muted));
  transition: width var(--transition-base);
}

.mf-header__nav-link:hover::after,
.mf-header__nav-link:focus-visible::after {
  width: 100%;
}

.mf-header__nav-item--cta .mf-header__nav-link--cta {
  padding: 0.4rem 1.1rem;
  border-radius: 999px;
  border: 1px solid rgba(209, 184, 148, 0.7);
  background: radial-gradient(circle at top left, rgba(209, 184, 148, 0.15), transparent 60%),
              linear-gradient(135deg, rgba(17, 24, 39, 0.9), rgba(15, 23, 33, 0.98));
  box-shadow: var(--shadow-sm);
}

.mf-header__nav-item--cta .mf-header__nav-link--cta::after {
  display: none;
}

.mf-header__nav-item--cta .mf-header__nav-link--cta:hover {
  border-color: var(--color-sand);
  box-shadow: var(--shadow-soft);
}

.mf-header__cart-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.mf-header__cart-icon i {
  font-size: 0.9rem;
}

/* Mobile toggle */

.mf-header__toggle {
  display: none;
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid var(--color-border-subtle);
  background: rgba(15, 23, 33, 0.85);
  align-items: center;
  justify-content: center;
  padding: 0;
}

.mf-header__toggle-bar {
  width: 18px;
  height: 1.5px;
  border-radius: 999px;
  background-color: var(--gray-200);
  transition: transform var(--transition-fast), opacity var(--transition-fast), translate var(--transition-fast);
}

.mf-header__toggle-bar:nth-child(2) {
  margin-block: 4px;
}

.mf-header__toggle[aria-expanded="true"] .mf-header__toggle-bar:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.mf-header__toggle[aria-expanded="true"] .mf-header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.mf-header__toggle[aria-expanded="true"] .mf-header__toggle-bar:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* Responsive behavior */

@media (max-width: 768px) {
  .mf-header__toggle {
    display: inline-flex;
    flex-direction: column;
  }

  .mf-header__nav {
    position: fixed;
    inset-inline: 0;
    top: 64px;
    background: radial-gradient(circle at top, rgba(209, 184, 148, 0.14), transparent 55%),
                rgba(15, 23, 33, 0.98);
    border-bottom: 1px solid var(--color-border-subtle);
    transform: translateY(-110%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
  }

  .mf-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-6) var(--space-4) var(--space-6);
    gap: var(--space-4);
  }

  .mf-header__nav-link {
    font-size: var(--font-size-base);
  }

  .mf-header__nav--open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
}

@media (max-width: 480px) {
  .mf-header__logo-text {
    font-size: var(--font-size-base);
  }
}