/* Mobile layout pass: keep the Rhine palette while returning each screen to a readable flow. */
@media (max-width: 980px) {
  html,
  body,
  .app-shell {
    overflow-x: hidden;
  }

  #auth-screen,
  #homepage-screen,
  #headquarters-screen,
  #member-screen,
  #department-screen,
  #research-screen {
    overflow-x: hidden;
  }

  :is(#headquarters-screen, #member-screen, #department-screen, #research-screen) > .brand-mark {
    top: 1.2rem;
    left: 1.3rem;
  }

  :is(#auth-screen, #headquarters-screen, #member-screen, #department-screen, #research-screen) > .screen-watermark {
    inset: 6%;
  }

  /* Authorization needs enough breathing room without creating a second page below the card. */
  #auth-screen {
    overflow-y: auto;
    padding: 1rem;
    align-items: safe center;
  }

  #auth-screen .auth-screen__inner {
    min-width: 0;
    width: 100%;
    padding: 1rem .25rem;
    gap: .85rem;
  }

  #auth-screen .orbit-system {
    width: min(12.5rem, 68vw);
    --orbit-outer-radius: min(6.25rem, 34vw);
    --orbit-inner-radius: min(2.75rem, 15vw);
  }

  #auth-screen .auth-screen__subcopy {
    max-width: 18rem;
    line-height: 1.65;
  }

  #auth-screen .auth-screen__replay:hover,
  #auth-screen .auth-screen__replay:focus-visible {
    color: var(--color-cream);
  }

  /* Experience: place the readable copy, navigation and footer in one vertical sequence. */
  #headquarters-screen {
    overflow-y: auto;
  }

  #headquarters-screen .headquarters-screen__content {
    height: auto;
    min-height: auto;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
    padding: 8rem 1rem .75rem;
  }

  #headquarters-screen .headquarters-copy {
    max-width: none;
    padding: 0;
    color: var(--color-cream);
    text-shadow: 0 2px 14px rgba(0, 0, 0, .72);
  }

  #headquarters-screen .headquarters-copy__title {
    color: var(--color-cream);
    font-size: 2.75rem;
    letter-spacing: 0;
  }

  #headquarters-screen .headquarters-copy__summary {
    max-width: none;
    line-height: 1.7;
  }

  #headquarters-screen .headquarters-actions {
    margin-top: 1.5rem;
  }

  #headquarters-screen .side-nav {
    position: static;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: .35rem .55rem;
    width: 100%;
    padding: .7rem .55rem;
    transform: none;
    opacity: 1;
  }

  #headquarters-screen .side-nav__item {
    min-height: 44px;
    padding: .55rem .45rem;
    font-size: .75rem;
    letter-spacing: 0;
    color: var(--color-text);
  }

  #headquarters-screen .side-nav__item--active {
    color: var(--color-accent);
  }

  /* Carousel: reserve space for the arrows so neither control becomes a half-visible hit target. */
  #member-screen {
    overflow-y: auto;
  }

  #member-screen .member-screen__content {
    min-height: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 8rem 1rem 1rem;
  }

  #member-screen .member-carousel {
    width: 100%;
    min-height: auto;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    padding: 0;
  }

  #member-screen .member-carousel__stage {
    width: 100%;
    max-width: 20rem;
    height: 31rem;
    min-width: 0;
    grid-column: 1 / -1;
    grid-row: 1;
  }

  #member-screen .member-card {
    padding: 1.1rem;
  }

  #member-screen .member-card__art {
    height: 11rem;
    margin-top: .8rem;
  }

  #member-screen .member-card__title {
    font-size: 1.65rem;
    letter-spacing: 0;
    overflow-wrap: anywhere;
  }

  #member-screen .member-card__desc {
    font-size: .83rem;
    line-height: 1.6;
  }

  #member-screen .member-card:not(.is-active) {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: scale(.96);
  }

  #member-screen .member-card__art img {
    inset: 0;
    min-width: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    transform: none;
  }

  #member-screen .member-carousel__arrow {
    position: relative;
    inset: auto;
    width: 48px;
    height: 48px;
    grid-row: 2;
    transform: none;
  }

  #member-screen .member-carousel__arrow--prev {
    grid-column: 1;
    justify-self: end;
  }

  #member-screen .member-carousel__arrow--next {
    grid-column: 2;
    justify-self: start;
  }

  #member-screen .side-nav,
  #department-screen .side-nav,
  #research-screen .side-nav--light {
    position: static;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: .35rem .55rem;
    width: 100%;
    padding: .7rem .55rem;
    transform: none;
    opacity: 1;
  }

  #member-screen .side-nav__item,
  #department-screen .side-nav__item,
  #research-screen .side-nav--light .side-nav__item {
    min-height: 44px;
    padding: .55rem .45rem;
    font-size: .75rem;
    letter-spacing: 0;
    text-align: center;
  }

  #headquarters-screen.is-visible .side-nav,
  #member-screen.is-visible .side-nav,
  #department-screen.is-visible .side-nav,
  #research-screen.is-visible .side-nav {
    animation-name: memberNavInMobile;
    margin: 0;
  }

  /* Projects: both card clusters and the detail panel become a predictable single column flow. */
  #department-screen {
    overflow-y: auto;
  }

  #department-screen .department-screen__content {
    min-height: auto;
    display: flex;
    flex-direction: column;
    gap: .75rem;
    padding: 8rem 1rem 1rem;
  }

  #department-screen .department-cluster {
    position: static;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: .8rem;
    width: 100%;
    height: auto;
    margin: 0;
    transform: none;
  }

  #department-screen .department-card {
    position: static;
    width: auto;
    height: auto;
    min-height: 8.4rem;
    padding: .9rem .8rem;
    transform: none !important;
  }

  #department-screen .department-card__code {
    font-size: 1.65rem;
    letter-spacing: 0;
    overflow-wrap: anywhere;
  }

  #department-screen .department-card__desc {
    font-size: .65rem;
    letter-spacing: 0;
    overflow-wrap: anywhere;
  }

  #department-screen .department-panel {
    position: relative;
    inset: auto;
    width: 100%;
    min-height: 0;
    margin: .15rem 0;
    padding: 1.5rem 1.15rem 1.35rem;
    transform: none;
  }

  #department-screen .department-panel__title {
    margin-top: 3.7rem;
    font-size: 1.85rem;
    letter-spacing: 0;
    overflow-wrap: anywhere;
  }

  #department-screen .department-panel__copy {
    font-size: .86rem;
    line-height: 1.7;
  }

  /* Education: the research brief, switching card and section nav no longer share a stack. */
  #research-screen {
    overflow-y: auto;
  }

  #research-screen .brand-mark {
    top: 1.2rem;
    color: var(--color-cream);
  }

  #research-screen .brand-mark__meta {
    color: inherit;
  }

  #headquarters-screen > .screen-footer,
  #research-screen > .screen-footer {
    color: var(--color-cream);
  }

  #research-screen .research-screen__content {
    min-height: auto;
    display: flex;
    flex-direction: column;
    gap: .85rem;
    padding: 8rem 1rem 1rem;
  }

  #research-screen .research-panel,
  #research-screen .research-info {
    position: relative;
    inset: auto;
    width: 100%;
    max-width: none;
    margin: 0;
  }

  #research-screen .research-panel {
    padding: 1.15rem;
  }

  #research-screen .research-panel__title {
    font-size: 1.85rem;
    letter-spacing: 0;
  }

  #research-screen .research-progress {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: .8rem;
    margin-top: 1rem;
  }

  #research-screen .research-progress__shell {
    width: 9rem;
    height: 9rem;
    max-width: 100%;
  }

  #research-screen .research-progress__grid {
    --circle-size: 21px;
    --gap: 3px;
  }

  #research-screen .research-progress__value {
    font-size: 2.2rem;
  }

  #research-screen .research-panel__quote {
    margin-top: 1.2rem;
    font-size: .85rem;
    line-height: 1.7;
  }

  #research-screen .research-panel__button {
    width: 100%;
    margin-top: 1.2rem;
  }

  #research-screen .research-info {
    padding: .95rem 1rem 1.1rem;
  }

  #research-screen .research-info__status {
    font-size: .88rem;
  }

  #research-screen .research-info__title {
    font-size: 1.2rem;
  }

  #research-screen .research-info__copy {
    font-size: .8rem;
    line-height: 1.65;
  }

  #research-screen .research-info__switch {
    min-width: 44px;
    min-height: 44px;
    letter-spacing: 0;
  }

  #research-screen .research-panel__button,
  #research-screen .research-info__link {
    min-height: 44px;
    letter-spacing: 0;
  }

  .info-modal__panel {
    max-height: calc(100dvh - 2rem);
    overflow-y: auto;
  }

  .info-modal__actions {
    display: grid;
    grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
    gap: .5rem;
  }

  .info-modal__button {
    min-width: 0;
    min-height: 48px;
    padding: .75rem .5rem;
    letter-spacing: 0;
    text-align: center;
  }

  .info-modal__close {
    width: 44px;
    height: 44px;
    top: .25rem;
    right: .25rem;
  }

  .info-modal__title {
    padding-right: .5rem;
    font-size: 1.75rem;
    letter-spacing: 0;
  }

  .info-modal__value {
    overflow-wrap: anywhere;
  }

  /* Footers belong after the content on scrollable screens, never on top of it. */
  #headquarters-screen > .screen-footer,
  #member-screen > .screen-footer,
  #department-screen > .screen-footer,
  #research-screen > .screen-footer {
    position: static;
    min-height: 0;
    margin: 0 1rem 1.25rem;
    padding: .7rem 0 0;
    font-size: .58rem;
    letter-spacing: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-bottom: env(safe-area-inset-bottom, 0px);
  }

  #headquarters-screen > .screen-footer .screen-footer__compliance,
  #member-screen > .screen-footer .screen-footer__compliance,
  #department-screen > .screen-footer .screen-footer__compliance,
  #research-screen > .screen-footer .screen-footer__compliance {
    position: static;
    max-width: none;
    transform: none;
  }

  #headquarters-screen > .screen-footer .screen-footer__brand,
  #member-screen > .screen-footer .screen-footer__brand,
  #department-screen > .screen-footer .screen-footer__brand,
  #research-screen > .screen-footer .screen-footer__brand {
    position: static;
    justify-content: center;
    margin-top: .45rem;
  }

  #headquarters-screen > .screen-footer .screen-footer__report,
  #member-screen > .screen-footer .screen-footer__report,
  #department-screen > .screen-footer .screen-footer__report,
  #research-screen > .screen-footer .screen-footer__report {
    white-space: normal;
  }
}

@media (max-width: 350px) {
  #department-screen .department-cluster {
    gap: .6rem;
  }

  #department-screen .department-card {
    min-height: 7.8rem;
  }
}