/* Header styles for PowerFiit Gym */

.pfg-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: radial-gradient(circle at top left, rgba(37, 99, 235, 0.28), transparent 55%),
              radial-gradient(circle at bottom right, rgba(163, 230, 53, 0.1), transparent 60%),
              rgba(15, 23, 42, 0.96);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--color-border-subtle);
}

.pfg-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
  gap: var(--space-4);
}

/* Brand / logo */

.pfg-header__brand {
  display: flex;
  align-items: center;
}

.pfg-header__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: var(--font-size-sm);
}

.pfg-header__logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 40% 60% 55% 45%;
  background: conic-gradient(from 160deg, var(--color-accent), var(--color-primary), #1d4ed8, var(--color-accent));
  box-shadow: 0 0 0 2px rgba(15, 23, 42, 0.9), 0 0 30px rgba(37, 99, 235, 0.7);
}

.pfg-header__logo-text {
  font-family: var(--font-heading);
  font-size: var(--font-size-base);
}

/* Navigation */

.pfg-header__nav {
  display: flex;
}

.pfg-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
}

.pfg-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-muted);
}

.pfg-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.35rem;
  height: 2px;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--color-accent), var(--color-primary));
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-normal);
  opacity: 0.9;
}

.pfg-header__nav-link:hover,
.pfg-header__nav-link:focus-visible {
  color: var(--color-text);
}

.pfg-header__nav-link:hover::after,
.pfg-header__nav-link:focus-visible::after {
  transform: scaleX(1);
}

.pfg-header__nav-item--cta .pfg-header__nav-link--cta {
  padding: 0.4rem 1.1rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(163, 230, 53, 0.9);
  background: linear-gradient(135deg, var(--color-accent), #84cc16);
  color: #020617;
  font-size: var(--font-size-xs);
  letter-spacing: 0.11em;
  text-transform: uppercase;
  box-shadow: 0 10px 24px rgba(163, 230, 53, 0.5);
}

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

.pfg-header__nav-item--cta .pfg-header__nav-link--cta:hover {
  transform: translateY(-1px);
}

/* Mobile toggle */

.pfg-header__toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  padding: 0.35rem 0.8rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-subtle);
  background: rgba(15, 23, 42, 0.8);
  color: var(--color-text);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.pfg-header__toggle-icon {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
}

.pfg-header__toggle-icon span {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--color-text);
  transition: transform var(--transition-normal), opacity var(--transition-normal), background-color var(--transition-normal);
}

.pfg-header__toggle[aria-expanded="true"] .pfg-header__toggle-icon span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

.pfg-header__toggle[aria-expanded="true"] .pfg-header__toggle-icon span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Focus styles */

.pfg-header__logo:focus-visible,
.pfg-header__toggle:focus-visible,
.pfg-header__nav-link:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
  border-radius: var(--radius-pill);
}

/* Responsive behavior */

@media (max-width: 768px) {
  .pfg-header__inner {
    padding-top: var(--space-2);
    padding-bottom: var(--space-2);
  }

  .pfg-header__toggle {
    display: inline-flex;
  }

  .pfg-header__nav {
    position: fixed;
    inset-inline: 0;
    top: 64px;
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(22px);
    border-top: 1px solid var(--color-border-subtle);
    border-bottom: 1px solid rgba(15, 23, 42, 0.95);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-normal), opacity var(--transition-normal), visibility var(--transition-normal);
  }

  .pfg-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
    padding: var(--space-4) var(--container-padding-x) var(--space-5);
  }

  .pfg-header__nav-link {
    width: 100%;
    padding: 0.4rem 0;
    font-size: var(--font-size-base);
  }

  .pfg-header__nav-item--cta {
    width: 100%;
    margin-top: var(--space-2);
  }

  .pfg-header__nav-item--cta .pfg-header__nav-link--cta {
    width: 100%;
    justify-content: center;
  }

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

@media (min-width: 769px) {
  .pfg-header__nav {
    position: static;
    transform: none !important;
    opacity: 1 !important;
    visibility: visible !important;
  }
}