/**
 * Shared site header — EquitAI
 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 0.5px solid var(--ds-border);
}

.site-header__inner {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-brand {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem;
  text-decoration: none;
  min-width: 0;
  flex-shrink: 1;
}

.site-brand__wordmark {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ds-text);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.site-brand__ai {
  color: var(--ds-brand-strong);
  font-weight: 800;
}

.site-brand__suffix {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ds-text-muted);
  line-height: 1.2;
}

.site-brand__name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ds-text);
  line-height: 1.2;
}

.site-brand__product {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ds-brand);
  line-height: 1.2;
}

.site-nav {
  display: none;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  display: inline-block;
  padding: 0.45rem 0.65rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--ds-text-muted);
  text-decoration: none;
  border-radius: var(--ds-radius-sm);
  transition: color 0.15s ease, background 0.15s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--ds-text);
  background: var(--ds-surface-muted);
}

.site-nav__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.site-nav__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 0.9rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: #fff !important;
  background: var(--ds-brand-strong);
  border-radius: var(--ds-radius-md);
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.15s ease;
}

.site-nav__cta:hover {
  background: var(--ds-brand-dark);
}

.site-nav__link-tool {
  display: none;
  align-items: center;
  justify-content: center;
  padding: 0.45rem 0.75rem;
  font-size: 0.82rem;
  font-weight: var(--ds-weight-medium);
  color: var(--ds-text-muted);
  text-decoration: none;
  border-radius: var(--ds-radius-sm);
  white-space: nowrap;
  transition: color 0.15s ease, background 0.15s ease;
}

.site-nav__link-tool:hover,
.site-nav__link-tool:focus-visible {
  color: var(--ds-text);
  background: var(--ds-surface-muted);
}

.site-nav__link-tool--mobile {
  display: inline-flex;
  justify-content: center;
  margin-top: 0.5rem;
  border: 0.5px solid var(--ds-border);
  border-radius: var(--ds-radius-md);
  padding: 0.65rem 1rem;
}

.site-header__menu-btn {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border: 0.5px solid var(--ds-border);
  border-radius: var(--ds-radius-sm);
  background: var(--ds-surface);
  cursor: pointer;
}

.site-header__menu-btn span {
  display: block;
  width: 1.1rem;
  height: 2px;
  margin: 0 auto;
  background: var(--ds-text);
  border-radius: 1px;
}

.site-mobile-menu {
  display: none;
  flex-direction: column;
  border-top: 0.5px solid var(--ds-border);
  background: var(--ds-surface);
  padding: 0.5rem 1.25rem 1rem;
}

.site-mobile-menu.is-open {
  display: flex;
}

.site-mobile-menu a {
  padding: 0.75rem 0;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ds-text);
  text-decoration: none;
  border-bottom: 0.5px solid var(--ds-border);
}

.site-mobile-menu a:last-child {
  border-bottom: none;
}

.site-mobile-menu .site-nav__cta {
  margin-top: 0.75rem;
  text-align: center;
}

.site-nav__cta--desktop {
  display: none;
}

@media (min-width: 900px) {
  .site-nav__cta--desktop {
    display: inline-flex;
  }

  .site-nav__link-tool:not(.site-nav__link-tool--mobile) {
    display: inline-flex;
  }

  .site-nav__link-tool--mobile {
    display: none;
  }
}

@media (min-width: 900px) {
  .site-header__inner {
    padding: 0.85rem 1.5rem;
  }

  .site-nav {
    display: flex;
  }

  .site-header__menu-btn {
    display: none;
  }

  .site-mobile-menu {
    display: none !important;
  }
}