/* Header styles for BikeFlow Rent Lounge */

.bfr-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(5, 7, 11, 0.96), rgba(5, 7, 11, 0.7));
  border-bottom: 1px solid rgba(148, 163, 184, 0.3);
}

.bfr-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 */

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

.bfr-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}

.bfr-header__logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid rgba(250, 204, 21, 0.7);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 30% 0, rgba(250, 204, 21, 0.4), transparent 55%),
    radial-gradient(circle at 80% 110%, rgba(15, 23, 42, 0.8), #020617 70%);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.65);
}

.bfr-header__logo-icon {
  color: var(--color-primary-strong);
  font-size: 1rem;
}

.bfr-header__brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.bfr-header__brand-name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.bfr-header__brand-tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

/* Navigation */

.bfr-header__nav {
  display: flex;
  align-items: center;
}

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

.bfr-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-100);
  padding-block: 0.4rem;
}

.bfr-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, #facc15, #f97316);
  transition: width var(--transition-base);
}

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

.bfr-header__nav-item--cta {
  margin-left: var(--space-4);
}

.bfr-header__nav-link--cta {
  padding-inline: 1.4rem;
  padding-block: 0.6rem;
  font-size: 0.7rem;
}

/* Mobile menu toggle */

.bfr-header__nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-2);
  color: var(--gray-100);
  cursor: pointer;
}

.bfr-header__nav-toggle-box {
  width: 30px;
  height: 22px;
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
}

.bfr-header__nav-toggle-line {
  height: 2px;
  border-radius: 999px;
  background-color: var(--gray-100);
  transition: transform var(--transition-base), opacity var(--transition-base),
    background-color var(--transition-base);
}

.bfr-header__nav-toggle-text {
  font-size: var(--font-size-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

/* Mobile state */

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

  .bfr-header__nav-toggle {
    display: inline-flex;
  }

  .bfr-header__nav {
    position: fixed;
    inset: 0 0 auto 0;
    top: 64px;
    background: radial-gradient(circle at top, #020617 0, #020617 60%, #030712 100%);
    border-top: 1px solid rgba(148, 163, 184, 0.28);
    padding: var(--space-4) var(--space-4) var(--space-8);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-base), opacity var(--transition-base),
      visibility var(--transition-base);
  }

  .bfr-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .bfr-header__nav-item--cta {
    width: 100%;
    margin-left: 0;
    margin-top: var(--space-3);
  }

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

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

  .bfr-header--nav-open .bfr-header__nav-toggle-line:nth-child(1) {
    transform: translateY(10px) rotate(45deg);
  }

  .bfr-header--nav-open .bfr-header__nav-toggle-line:nth-child(2) {
    transform: translateY(-10px) rotate(-45deg);
  }
}

/* Larger screens refinements */

@media (min-width: 1024px) {
  .bfr-header__brand-name {
    font-size: 1.1rem;
  }

  .bfr-header__nav-list {
    gap: var(--space-5);
  }
}

/* Utility when JS is disabled: keep nav visible */

.no-js .bfr-header__nav {
  position: static;
  transform: none;
  opacity: 1;
  visibility: visible;
}