/* Header styles for Analytidex */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(16px);
  background:
    linear-gradient(to bottom, rgba(5, 11, 22, 0.96), rgba(5, 11, 22, 0.9));
  border-bottom: 1px solid var(--color-border-subtle);
}

/* 18+ warning bar */
.header-age-warning {
  background: linear-gradient(90deg, #8b1111, #b31217);
  color: #fff5f5;
  font-size: var(--font-size-xs);
}

.header-age-warning__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-top: 0.45rem;
  padding-bottom: 0.45rem;
}

.header-age-warning__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.8rem;
  height: 1.8rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  font-size: 0.8rem;
  font-weight: 700;
}

.header-age-warning__text {
  margin: 0;
  color: inherit;
}

.header-age-warning__link {
  color: #fff;
  font-weight: 500;
  text-decoration: underline;
  white-space: nowrap;
}

.header-age-warning__link:hover {
  color: #ffe4e4;
}

@media (max-width: 640px) {
  .header-age-warning__inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .header-age-warning__link {
    align-self: flex-start;
  }
}

/* Main header */
.header-main {
  border-top: 1px solid rgba(255, 255, 255, 0.02);
}

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

.header-brand {
  flex: 0 0 auto;
}

.header-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
}

.header-logo__mark {
  width: 2.2rem;
  height: 2.2rem;
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at 30% 0, #4bbf73, transparent 55%),
              radial-gradient(circle at 80% 120%, #1f6fe5, transparent 60%),
              var(--color-neutral-100);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.header-logo__text {
  display: flex;
  flex-direction: column;
}

.header-logo__name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.header-logo__tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* Navigation */
.header-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-4);
}

.header-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.header-nav__link {
  position: relative;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  padding-bottom: 0.15rem;
}

.header-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.15rem;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-success));
  transition: width var(--transition-normal);
}

.header-nav__link:hover,
.header-nav__link:focus-visible {
  color: var(--color-text);
}

.header-nav__link:hover::after,
.header-nav__link:focus-visible::after {
  width: 100%;
}

.header-cta__button {
  font-size: var(--font-size-xs);
}

/* Mobile toggle */
.header-toggle {
  position: relative;
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.25rem;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-strong);
  background-color: rgba(15, 24, 38, 0.9);
  color: var(--color-text);
}

.header-toggle__bar {
  width: 1.2rem;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-text);
  transition: transform var(--transition-fast), opacity var(--transition-fast), width var(--transition-fast);
}

.header-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

/* Mobile / small screens */
@media (max-width: 880px) {
  .header-main__inner {
    padding-top: var(--space-2);
    padding-bottom: var(--space-2);
  }

  .header-toggle {
    display: inline-flex;
  }

  .header-nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    margin-top: 0.25rem;
    padding-inline: var(--space-4);
    opacity: 0;
    transform: translateY(-4px);
    pointer-events: none;
    max-height: 0;
    overflow: hidden;
    flex-direction: column;
    align-items: stretch;
  }

  .header-nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
    padding: var(--space-3);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-subtle);
    background: var(--color-surface);
    box-shadow: var(--shadow-md);
  }

  .header-cta {
    margin-top: 0.25rem;
    padding-inline: var(--space-3);
  }

  .header-cta__button {
    width: 100%;
    justify-content: center;
  }

  .header-nav--open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    max-height: 420px;
    transition: opacity var(--transition-normal), transform var(--transition-normal), max-height var(--transition-normal);
  }

  .header-toggle--active .header-toggle__bar:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
    width: 1.3rem;
  }

  .header-toggle--active .header-toggle__bar:nth-child(2) {
    opacity: 0;
  }

  .header-toggle--active .header-toggle__bar:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
    width: 1.3rem;
  }
}

/* Medium+ screens adjustments */
@media (min-width: 881px) {
  .header-nav {
    position: static;
  }
}