/* Responsive behavior and reduced-motion overrides. */
@media (max-width: 1100px) {
  :root {
    --shell: min(100% - 56px, 960px);
  }

  .hero-grid {
    grid-template-columns: 1fr 0.72fr;
    gap: 36px;
  }

  .agent-preview {
    margin-bottom: 168px;
  }

  .capabilities-layout {
    grid-template-columns: 1fr 1fr;
  }

  .capability-list {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .capability-list article:nth-child(odd) {
    padding-right: 28px;
    border-right: 1px solid var(--line);
  }

  .capability-list article:nth-child(even) {
    padding-left: 28px;
  }

  .architecture-flow {
    grid-template-columns: 1fr 28px 1fr 28px 1fr 28px 1fr;
  }
}

@media (max-width: 820px) {
  :root {
    --shell: calc(100% - 40px);
    --header-height: 76px;
  }

  .site-header,
  .site-header.is-scrolled {
    height: var(--header-height);
  }

  body.nav-open .site-header {
    background: var(--ink);
    box-shadow: none;
  }

  .brand-copy strong {
    font-size: 18px;
  }

  .menu-toggle {
    display: block;
    color: var(--white);
  }

  .menu-toggle[aria-expanded="true"] {
    border: 1px solid rgba(88, 214, 189, 0.75);
    background: rgba(88, 214, 189, 0.08);
  }

  .menu-toggle[aria-expanded="true"] span:nth-child(2) {
    transform: translateY(3.5px) rotate(45deg);
  }

  .menu-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-3.5px) rotate(-45deg);
  }

  .primary-nav {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    min-height: 100vh;
    min-height: 100dvh;
    padding: calc(var(--header-height) + 24px) 20px 32px;
    background: var(--ink);
    box-shadow: -24px 0 60px rgba(0, 0, 0, 0.34);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateX(100%);
    transition:
      transform 260ms var(--ease),
      opacity 180ms ease,
      visibility 0s linear 260ms;
  }

  .primary-nav.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(0);
    transition-delay: 0s;
  }

  .primary-nav a {
    padding: 20px 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.18);
    color: var(--white);
    font-size: 19px;
    font-weight: 600;
    line-height: 1.4;
  }

  .primary-nav .nav-contact {
    margin-top: 20px;
    border-color: var(--teal);
    color: var(--ink);
    text-align: center;
    background: var(--teal);
  }

  .hero {
    min-height: 920px;
  }

  .hero-media img {
    object-position: 63% center;
  }

  .hero-shade {
    background:
      linear-gradient(180deg, rgba(7, 20, 28, 0.75), rgba(7, 20, 28, 0.18) 34%, var(--ink) 72%),
      linear-gradient(90deg, var(--ink), transparent 85%);
  }

  .hero-grid {
    display: block;
    min-height: 880px;
    padding-top: 150px;
  }

  .hero h1 {
    font-size: clamp(44px, 12vw, 62px);
  }

  .hero-copy > p {
    max-width: 500px;
    font-size: 16px;
  }

  .agent-preview {
    width: min(100%, 420px);
    margin: 86px 0 0 auto;
  }

  .process-strip {
    display: none;
  }

  .capabilities,
  .scenarios,
  .about {
    padding: 104px 0;
  }

  .capabilities-layout,
  .about-intro {
    grid-template-columns: 1fr;
  }

  .no-break {
    white-space: normal;
  }

  .capability-system {
    max-width: 560px;
  }

  .architecture {
    padding: 104px 0;
  }

  .architecture-heading {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .architecture-heading > p {
    max-width: 520px;
  }

  .architecture-flow {
    grid-template-columns: 1fr 1fr;
    gap: 0;
    margin-top: 70px;
  }

  .architecture-flow > i {
    display: none;
  }

  .architecture-flow article {
    padding: 28px;
    border-right: 1px solid var(--dark-line);
    border-bottom: 1px solid var(--dark-line);
  }

  .architecture-flow svg {
    margin-top: 32px;
  }

  .scenario-workbench {
    grid-template-columns: 1fr;
  }

  .scenario-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    border-right: 0;
  }

  .scenario-tabs button {
    padding-left: 16px;
    border-right: 1px solid var(--line);
  }

  .scenario-tabs button::after {
    top: auto;
    right: 0;
    left: 0;
    width: auto;
    height: 3px;
    transform: scaleX(0);
  }

  .scenario-tabs button[aria-selected="true"]::after {
    transform: scaleX(1);
  }

  .values {
    grid-template-columns: 1fr 1fr;
  }

  .values article {
    padding-bottom: 32px;
  }

  .values article:nth-child(3) {
    padding-left: 0;
    border-left: 0;
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: 60px;
  }
}

@media (max-width: 560px) {
  :root {
    --shell: calc(100% - 32px);
  }

  .brand-mark {
    width: 34px;
  }

  .brand-copy small {
    display: none;
  }

  .hero {
    min-height: 940px;
  }

  .hero-grid {
    padding-top: 130px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
    max-width: 320px;
  }

  .button {
    justify-content: space-between;
  }

  .agent-preview {
    margin-top: 66px;
  }

  .section-heading h2,
  .architecture-heading h2,
  .scenarios-heading h2 {
    font-size: 36px;
  }

  .capability-system {
    grid-template-columns: 1fr;
  }

  .system-inputs::after,
  .system-inputs > div::after {
    display: none;
  }

  .system-core {
    width: 130px;
    margin: 20px auto;
  }

  .capability-list {
    display: block;
  }

  .capability-list article:nth-child(n) {
    padding-inline: 0;
    border-right: 0;
  }

  .architecture-flow {
    grid-template-columns: 1fr;
  }

  .architecture-flow article {
    min-height: 0;
    padding: 28px 0 38px;
    border-right: 0;
  }

  .architecture-flow svg {
    margin: 24px 0;
  }

  .scenario-tabs {
    display: block;
  }

  .scenario-tabs button {
    border-right: 0;
  }

  .scene-stage {
    min-height: 520px;
  }

  .scene-stage [role="tabpanel"] {
    padding: 42px 26px;
  }

  .conversation > div {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .simple-status {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
    margin-top: 60px;
  }

  .simple-status i {
    margin: 0;
  }

  .values {
    grid-template-columns: 1fr;
  }

  .values article:nth-child(n) {
    padding: 26px 0;
    border-bottom: 1px solid #cbd3d5;
    border-left: 0;
  }

  .footer-signal {
    grid-template-columns: 1fr;
  }

  .footer-signal > span {
    display: none;
  }

  .footer-main {
    padding-top: 72px;
  }

  .footer-wordmark strong {
    font-size: 64px;
  }

  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}