.cs-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.cs-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  min-height: 4.5rem;
}

.cs-header__brand {
  display: inline-flex;
  align-items: center;
  margin-right: auto;
  text-decoration: none;
  border-radius: var(--radius-sm);
}

.cs-header__brand:hover {
  text-decoration: none;
}

.cs-header__logo {
  height: 3rem;
  width: auto;
}

.cs-header__toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  border-radius: var(--radius-sm);
  color: var(--color-primary);
  order: 3;
}

.cs-header__toggle:hover {
  background-color: var(--cs-purple-light);
}

.cs-header__toggle-box {
  position: relative;
  display: block;
  width: 1.5rem;
  height: 1rem;
}

.cs-header__toggle-bar {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: var(--radius-pill);
  background-color: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur-fast) var(--ease), top var(--dur) var(--ease);
}

.cs-header__toggle-bar:nth-child(1) { top: 0; }
.cs-header__toggle-bar:nth-child(2) { top: calc(50% - 1px); }
.cs-header__toggle-bar:nth-child(3) { top: calc(100% - 2px); }

.cs-header[data-open] .cs-header__toggle-bar:nth-child(1) {
  top: calc(50% - 1px);
  transform: rotate(45deg);
}

.cs-header[data-open] .cs-header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.cs-header[data-open] .cs-header__toggle-bar:nth-child(3) {
  top: calc(50% - 1px);
  transform: rotate(-45deg);
}

.cs-header__cta {
  order: 2;
  white-space: nowrap;
  flex-shrink: 0;
}

.cs-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-2xs);
  margin: 0;
  padding: 0;
  list-style: none;
}

.cs-nav__item {
  margin: 0;
  position: relative;
}

.cs-nav__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3xs);
  padding: var(--space-2xs) var(--space-xs);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-weight: var(--weight-semibold);
  font-size: var(--text-sm);
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
}

.cs-nav__link:hover {
  color: var(--color-primary);
  background-color: var(--color-bg-alt);
  text-decoration: none;
}

.cs-nav__link[aria-current="page"] {
  color: var(--color-primary);
  box-shadow: inset 0 -2px 0 0 var(--color-primary);
}

.cs-nav__disclosure {
  border: none;
  background: none;
  cursor: pointer;
  font: inherit;
}

.cs-nav__caret {
  transition: transform var(--dur) var(--ease);
}

.cs-nav__disclosure[aria-expanded="true"] .cs-nav__caret {
  transform: rotate(180deg);
}

.cs-nav__menu {
  margin: 0;
  padding: var(--space-3xs);
  list-style: none;
}

.cs-nav__menu li {
  margin: 0;
}

.cs-nav__menu-link {
  display: block;
  padding: var(--space-2xs) var(--space-xs);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-weight: var(--weight-semibold);
  font-size: var(--text-sm);
  text-decoration: none;
  white-space: nowrap;
}

.cs-nav__menu-link:hover {
  color: var(--color-primary);
  background-color: var(--color-bg-alt);
  text-decoration: none;
}

.cs-header__login {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2xs) var(--space-xs);
  color: var(--color-text);
  font-weight: var(--weight-semibold);
  font-size: var(--text-sm);
  text-decoration: none;
  white-space: nowrap;
}

.cs-header__login:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

@media (max-width: 63.99em) {
  .cs-header__collapse {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-2xs);
    max-height: calc(100vh - 4.5rem);
    overflow-y: auto;
    padding: var(--space-sm) var(--container-pad) var(--space-md);
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
  }

  .cs-header[data-open] .cs-header__collapse {
    display: flex;
  }

  .cs-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3xs);
  }

  .cs-nav__link {
    width: 100%;
    padding: var(--space-xs) var(--space-sm);
    font-size: var(--text-base);
  }

  .cs-nav__item--has-menu {
    display: flex;
    flex-direction: column;
  }

  .cs-nav__disclosure {
    justify-content: space-between;
  }

  .cs-nav__menu {
    display: none;
    padding-left: var(--space-md);
  }

  .cs-nav__disclosure[aria-expanded="true"] + .cs-nav__menu {
    display: block;
  }

  .cs-nav__menu-link {
    padding: var(--space-xs) var(--space-sm);
    font-size: var(--text-base);
  }

  .cs-header__login {
    width: 100%;
    padding: var(--space-xs) var(--space-sm);
    margin-top: var(--space-2xs);
    border-top: 1px solid var(--color-border);
    border-radius: 0;
    font-size: var(--text-base);
  }
}

@media (min-width: 64em) {
  .cs-header__toggle {
    display: none;
  }

  .cs-header__collapse {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex: 1 1 auto;
    justify-content: flex-end;
  }

  .cs-nav {
    margin-right: auto;
  }

  .cs-nav__item--has-menu {
    position: relative;
  }

  .cs-nav__menu {
    position: absolute;
    top: calc(100% + var(--space-3xs));
    left: 0;
    min-width: 12rem;
    display: none;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-overlay);
  }

  .cs-nav__disclosure[aria-expanded="true"] + .cs-nav__menu {
    display: block;
  }
}

.cs-footer {
  background-color: var(--cs-purple-deep);
  color: var(--color-text-inverse);
}

.cs-footer__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  padding-block: var(--space-2xl) var(--space-lg);
}

.cs-footer__brand {
  max-width: 22rem;
}

.cs-footer__brand-link {
  display: inline-flex;
  border-radius: var(--radius-sm);
}

.cs-footer__logo {
  height: 3.25rem;
  width: auto;
  filter: brightness(0) invert(1);
}

.cs-footer__tagline {
  margin-top: var(--space-sm);
  color: var(--cs-purple-light);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.cs-footer__nav {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.cs-footer__heading {
  margin-bottom: var(--space-sm);
  color: var(--color-text-inverse);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

.cs-footer__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.cs-footer__list li {
  margin: 0 0 var(--space-2xs);
}

.cs-footer__list a {
  color: var(--cs-purple-light);
  font-weight: var(--weight-regular);
  font-size: var(--text-sm);
  text-decoration: none;
}

.cs-footer__list a:hover {
  color: var(--color-text-inverse);
  text-decoration: underline;
}

.cs-footer__social {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2xs);
  margin: var(--space-md) 0 0;
  padding: 0;
  list-style: none;
}

.cs-footer__social li {
  margin: 0;
}

.cs-footer__social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-round);
  color: var(--color-text-inverse);
  background-color: rgba(255, 255, 255, 0.1);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.cs-footer__social-link:hover {
  color: var(--cs-purple-deep);
  background-color: var(--color-text-inverse);
}

.cs-footer__bar {
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  padding-top: var(--space-md);
}

.cs-footer__copyright {
  margin: 0;
  color: var(--cs-purple-light);
  font-size: var(--text-xs);
}

@media (min-width: 48em) {
  .cs-footer__nav {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 64em) {
  .cs-footer__inner {
    grid-template-columns: minmax(16rem, 1fr) 2fr;
    column-gap: var(--space-3xl);
  }

  .cs-footer__bar {
    grid-column: 1 / -1;
  }
}