/* Header styles for RIVERIONIX */

.rvx-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(5, 8, 20, 0.92), rgba(5, 8, 20, 0.78));
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.rvx-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
  padding-block: var(--space-6);
}

/* Brand */
.rvx-header__brand {
  display: flex;
  align-items: center;
}

.rvx-header__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-4);
  font-family: var(--font-display);
}

.rvx-header__logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: radial-gradient(circle at 20% 0%, var(--color-primary) 0, var(--color-accent) 60%);
  box-shadow: var(--shadow-glow-primary);
  font-weight: 700;
  font-size: 1.1rem;
  color: #050814;
}

.rvx-header__logo-text {
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.85rem;
}

.rvx-header__logo-tagline {
  display: none;
  font-size: 0.7rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

/* Navigation */
.rvx-header__nav {
  display: block;
}

.rvx-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.rvx-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  padding-block: var(--space-2);
}

.rvx-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.35rem;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform-origin: center;
  transform: scaleX(0);
  opacity: 0;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.rvx-header__nav-link:hover,
.rvx-header__nav-link:focus-visible {
  color: var(--gray-50);
}

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

.rvx-header__nav-item--cta .rvx-header__nav-link--cta {
  padding-inline: var(--space-6);
  padding-block: var(--space-3);
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: radial-gradient(circle at 0 0, rgba(255, 255, 255, 0.16), transparent 55%),
              linear-gradient(135deg, var(--color-accent-soft), var(--color-primary-soft));
  box-shadow: var(--shadow-sm);
  color: var(--gray-50);
}

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

.rvx-header__nav-item--cta .rvx-header__nav-link--cta:hover,
.rvx-header__nav-item--cta .rvx-header__nav-link--cta:focus-visible {
  border-color: rgba(20, 225, 167, 0.8);
  box-shadow: var(--shadow-glow-primary);
}

/* Mobile toggle */
.rvx-header__toggle {
  display: none;
  align-items: center;
  gap: var(--space-3);
  padding-inline: var(--space-4);
  padding-block: var(--space-3);
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(5, 8, 20, 0.6);
  color: var(--gray-50);
}

.rvx-header__toggle-box {
  width: 20px;
  height: 16px;
  position: relative;
}

.rvx-header__toggle-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transition: transform var(--transition-base), opacity var(--transition-base), top var(--transition-base), bottom var(--transition-base);
}

.rvx-header__toggle-line--top { top: 0; }
.rvx-header__toggle-line--middle { top: 50%; transform: translateY(-50%); }
.rvx-header__toggle-line--bottom { bottom: 0; }

.rvx-header__toggle-text {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

/* Open state */
.rvx-header--menu-open .rvx-header__toggle-line--top {
  top: 50%;
  transform: translateY(-50%) rotate(42deg);
}

.rvx-header--menu-open .rvx-header__toggle-line--middle {
  opacity: 0;
}

.rvx-header--menu-open .rvx-header__toggle-line--bottom {
  bottom: auto;
  top: 50%;
  transform: translateY(-50%) rotate(-42deg);
}

.rvx-header--menu-open .rvx-header__toggle {
  border-color: rgba(20, 225, 167, 0.8);
  box-shadow: var(--shadow-glow-primary);
}

/* Responsive behavior */
@media (max-width: 920px) {
  .rvx-header__logo-tagline {
    display: none;
  }
}

@media (min-width: 921px) {
  .rvx-header__logo-tagline {
    display: inline-flex;
  }
}

@media (max-width: 768px) {
  .rvx-header__inner {
    padding-block: var(--space-5);
  }

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

  .rvx-header__nav {
    position: fixed;
    inset-inline: 0;
    top: 56px;
    background: radial-gradient(circle at top, rgba(20, 225, 167, 0.12), transparent 60%), var(--color-bg-elevated);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transform-origin: top;
    transform: scaleY(0.9);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  }

  .rvx-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding-inline: var(--space-16);
    padding-block: var(--space-6);
    gap: var(--space-4);
  }

  .rvx-header__nav-item--cta {
    width: 100%;
  }

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

  .rvx-header--menu-open .rvx-header__nav {
    opacity: 1;
    visibility: visible;
    transform: scaleY(1);
  }
}

@media (prefers-reduced-motion: reduce) {
  .rvx-header__nav,
  .rvx-header__toggle-line {
    transition: none !important;
  }
}