/* Section styles, merged from per-section fragments in implementation order.
   Namespaces: site-header, hd- (hero), ld- (live-deck), pl- (pipeline),
   gal- (gallery), cjk-, md- (modes), st- (start), ft- (footer). */

/* ---------- site header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--fill);
}
.site-header-inner {
  display: flex;
  align-items: center;
  gap: calc(var(--u) * 3);
  padding-block: calc(var(--u) * 1.5);
}
.wordmark {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--navy);
  text-decoration: none;
  white-space: nowrap;
}
.site-nav {
  display: flex;
  gap: calc(var(--u) * 2.5);
  margin-left: auto;
}
.site-nav a {
  color: var(--grey-700);
  text-decoration: none;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}
.site-nav a:hover {
  color: var(--navy);
}
.star-link {
  padding: calc(var(--u)) calc(var(--u) * 2);
  font-size: 0.75rem;
}
@media (max-width: 760px) {
  .site-nav {
    display: none;
  }
}

/* ---------- hd- hero (product theater: CF OS-style tabs + live stage) ---------- */
#hero {
  position: relative;
  background: var(--navy);
  padding-block: calc(var(--u) * 10) calc(var(--u) * 10);
}
#hero h1 {
  color: #fff;
  max-width: 40rem;
}
#hero .lede {
  color: rgba(255, 255, 255, 0.78);
  max-width: 40rem;
}
#hero .btn-primary {
  background: #fff;
  color: var(--navy);
}
#hero .btn-primary:hover {
  color: var(--navy);
}
#hero .btn-ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.45);
  color: #fff;
}
#hero .btn-ghost:hover {
  border-color: #fff;
  color: #fff;
}
.hd-intro {
  max-width: 44rem;
  margin-bottom: calc(var(--u) * 6);
}
.hd-actions {
  display: flex;
  gap: calc(var(--u) * 2);
  flex-wrap: wrap;
  margin-top: calc(var(--u) * 3);
}
.hd-theater {
  margin-top: calc(var(--u) * 2);
}
.hd-tabs {
  display: flex;
  gap: calc(var(--u) * 3);
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  margin-bottom: calc(var(--u) * 3);
  overflow-x: auto;
  scrollbar-width: none;
}
.hd-tabs::-webkit-scrollbar {
  display: none;
}
.hd-tab {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.55);
  background: none;
  border: 0;
  border-bottom: 2px solid transparent;
  padding: calc(var(--u)) calc(var(--u) * 0.5) calc(var(--u) * 1.5);
  cursor: pointer;
  white-space: nowrap;
  transition:
    color 180ms ease,
    border-color 180ms ease;
}
.hd-tab .hd-num {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.35);
  margin-right: calc(var(--u));
}
.hd-tab.is-active {
  color: #fff;
  border-bottom-color: #fff;
  font-weight: 600;
}
.hd-tab.is-active .hd-num {
  color: #fff;
}
.hd-tab:hover {
  color: rgba(255, 255, 255, 0.9);
}
.hd-stage {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.4);
}
/* Keep inactive panels laid out so iframes don't collapse to 0×0.
   (display:none + aspect-ratio iframes fail to recover in Chromium.) */
.hd-panel[hidden] {
  display: block !important;
  position: absolute;
  inset: 0;
  visibility: hidden;
  pointer-events: none;
  z-index: 0;
}
.hd-panel {
  position: relative;
  z-index: 1;
  animation: hd-panel-in 420ms cubic-bezier(0.22, 1, 0.36, 1) both;
}
@keyframes hd-panel-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
@media (prefers-reduced-motion: reduce) {
  .hd-panel {
    animation: none;
  }
}
.hd-chrome {
  border: 0;
  box-shadow: none;
  border-radius: 0;
  background: #0b1220;
}
.hd-chrome .chrome-bar {
  background: rgba(255, 255, 255, 0.06);
  border-bottom-color: rgba(255, 255, 255, 0.08);
}
.hd-chrome .chrome-url {
  color: rgba(255, 255, 255, 0.45);
}
.hd-chrome iframe {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 0;
  background: #0b1220;
}
.hd-slide-show {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #0b1220;
}
.hd-slide-show img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  opacity: 0;
  transition: opacity 520ms ease;
  background: #fff;
}
.hd-slide-show img.is-on {
  opacity: 1;
  z-index: 1;
}
.hd-try {
  display: grid;
  grid-template-columns: 1fr auto 1.2fr;
  gap: calc(var(--u) * 3);
  align-items: center;
  padding: calc(var(--u) * 4);
  min-height: min(52vw, 420px);
  background: linear-gradient(160deg, #0f1c3d 0%, #15296b 55%, #1a3378 100%);
}
@media (max-width: 720px) {
  .hd-try {
    grid-template-columns: 1fr;
    min-height: 0;
  }
  .hd-try-arrow {
    transform: rotate(90deg);
    justify-self: center;
  }
}
.hd-try-label {
  display: block;
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: calc(var(--u));
}
.hd-try-notes {
  background: rgba(0, 0, 0, 0.28);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 6px;
  padding: calc(var(--u) * 2.5);
  min-height: 11rem;
}
.hd-try-typed {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.88);
  white-space: pre-wrap;
  min-height: 7rem;
}
.hd-try-typed::after {
  content: "▋";
  color: rgba(255, 255, 255, 0.55);
  animation: hd-caret 900ms steps(1) infinite;
}
@keyframes hd-caret {
  50% {
    opacity: 0;
  }
}
.hd-try-arrow {
  font-size: 1.75rem;
  color: rgba(255, 255, 255, 0.55);
  font-weight: 300;
}
.hd-try-out {
  background: #fff;
  border-radius: 6px;
  padding: calc(var(--u) * 1.5);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}
.hd-try-out .hd-try-label {
  color: var(--grey-500);
  padding-left: calc(var(--u) * 0.5);
}
.hd-try-out img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 2px;
  opacity: 0.22;
  filter: grayscale(0.35);
  transition:
    opacity 480ms ease,
    filter 480ms ease;
}
.hd-try-out.is-reveal img {
  opacity: 1;
  filter: none;
  animation: hd-panel-in 600ms cubic-bezier(0.22, 1, 0.36, 1) both;
}
.hd-try-cta {
  display: flex;
  gap: calc(var(--u) * 2);
  flex-wrap: wrap;
  justify-content: center;
  padding: calc(var(--u) * 3) calc(var(--u) * 2) calc(var(--u) * 4);
  background: #0b1220;
  margin: 0;
}
.hd-stage-caption {
  margin-top: calc(var(--u) * 2);
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.5);
  text-align: right;
}

/* ---------- live-deck ---------- */
/* ld- live-deck */
.ld-frame {
  margin: 0;
}

.ld-frame > iframe {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--grey-300);
  box-shadow: var(--shadow-card);
  background: var(--paper);
}

.ld-caption {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: calc(var(--u)) calc(var(--u) * 2);
  margin-top: calc(var(--u) * 2);
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--grey-500);
}

.ld-open {
  color: var(--navy);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 1px solid var(--grey-300);
}

.ld-open:hover {
  border-bottom-color: var(--navy);
}

/* ---------- pipeline ---------- */
/* pl- pipeline */
.pl-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: calc(var(--u) * 3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.pl-step {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--u) * 2) calc(var(--u) * 3);
  border: 1px solid var(--grey-300);
  border-radius: 6px;
  background: var(--paper);
  font-size: 1rem;
  line-height: 1.4;
}

.pl-step::after {
  content: "";
  position: absolute;
  top: 50%;
  right: calc(var(--u) * -2);
  width: calc(var(--u) * 1.25);
  height: calc(var(--u) * 1.25);
  border-top: 2px solid var(--grey-500);
  border-right: 2px solid var(--grey-500);
  transform: translateY(-50%) rotate(45deg);
}

.pl-step:last-child::after {
  content: none;
}

.pl-step-spec {
  background: var(--tint);
  color: var(--navy);
}

.pl-code {
  font-family: var(--mono);
  font-size: inherit;
}

.pl-note {
  margin: calc(var(--u) * 4) 0 0;
  font-size: 0.75rem;
  color: var(--grey-500);
}

@media (max-width: 760px) {
  .pl-flow {
    grid-template-columns: 1fr;
  }

  .pl-step::after {
    top: auto;
    right: 50%;
    bottom: calc(var(--u) * -2);
    transform: translateX(50%) rotate(135deg);
  }
}

/* ---------- gallery ---------- */
/* Gallery section — namespace: gal- */

.gal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: calc(var(--u) * 3);
  margin-top: calc(var(--u) * 4);
}

.gal-noscript {
  color: var(--grey-500);
}

/* Cards */

.gal-card {
  display: flex;
  flex-direction: column;
  gap: calc(var(--u) * 1);
  padding: calc(var(--u) * 2);
  background: var(--paper);
  border: 1px solid var(--grey-300);
  border-radius: 6px;
  font: inherit;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}

.gal-card:hover {
  border-color: var(--navy);
}
.gal-offline {
  font-size: 0.75rem;
  color: var(--grey-500);
}

.gal-card img {
  width: 100%;
  background: var(--paper);
  border: 1px solid var(--grey-300);
  border-radius: 4px;
}

.gal-card-pattern {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--grey-500);
}

.gal-card-headline {
  font-size: 1rem;
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Lightbox */

.gal-lightbox {
  padding: 0;
  border: none;
  background: transparent;
  color: var(--ink);
  max-width: 100vw;
  max-height: 100vh;
}

.gal-lightbox::backdrop {
  background: rgba(21, 41, 107, 0.4);
}

.gal-lightbox-inner {
  display: grid;
  grid-template-areas:
    "header header"
    "stage spec"
    "nav nav";
  grid-template-columns: 3fr 2fr;
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: calc(var(--u) * 2) calc(var(--u) * 3);
  width: 92vw;
  max-width: 92vw;
  height: 88vh;
  max-height: 88vh;
  padding: calc(var(--u) * 3);
  background: var(--paper);
  border: 1px solid var(--grey-300);
  border-radius: 6px;
  box-shadow: var(--shadow-card);
}

.gal-lightbox-header {
  grid-area: header;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: calc(var(--u) * 2);
}

.gal-lightbox-caption {
  margin: 0;
  max-width: none;
  font-size: 1rem;
}

.gal-lightbox-headline {
  color: var(--ink);
}

.gal-lightbox-stage {
  grid-area: stage;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  min-height: 0;
  padding: calc(var(--u) * 2);
  background: var(--fill);
  border: 1px solid var(--grey-300);
  border-radius: 6px;
}

.gal-lightbox-stage img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.gal-lightbox-spec {
  grid-area: spec;
  display: flex;
  min-width: 0;
  min-height: 0;
}

.gal-lightbox-spec pre {
  flex: 1;
  min-height: 0;
  margin: 0;
  padding: calc(var(--u) * 2);
  overflow: auto;
  background: var(--fill);
  border: 1px solid var(--grey-300);
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 0.75rem;
  line-height: 1.55;
  color: var(--grey-700);
}

.gal-lightbox-nav {
  grid-area: nav;
  display: flex;
  justify-content: space-between;
  gap: calc(var(--u) * 2);
}

.gal-lightbox-close,
.gal-lightbox-prev,
.gal-lightbox-next {
  font: inherit;
  font-size: 1rem;
  padding: calc(var(--u) * 1) calc(var(--u) * 2);
  background: var(--paper);
  border: 1px solid var(--grey-300);
  border-radius: 6px;
  color: var(--ink);
  cursor: pointer;
}

.gal-lightbox-close {
  line-height: 1;
}

.gal-lightbox-close:hover,
.gal-lightbox-prev:hover,
.gal-lightbox-next:hover {
  border-color: var(--navy);
  color: var(--navy);
}

@media (max-width: 899px) {
  .gal-lightbox-inner {
    grid-template-areas:
      "header"
      "stage"
      "spec"
      "nav";
    grid-template-columns: 1fr;
    grid-template-rows: auto minmax(0, 1fr) minmax(0, 1fr) auto;
    gap: calc(var(--u) * 2);
    padding: calc(var(--u) * 2);
  }
}

@media (prefers-reduced-motion: no-preference) {
  .gal-card {
    transition:
      transform 120ms ease,
      box-shadow 120ms ease;
  }

  .gal-lightbox-close,
  .gal-lightbox-prev,
  .gal-lightbox-next {
    transition:
      color 120ms ease,
      border-color 120ms ease;
  }
}

/* ---------- cjk ---------- */
.cjk-frame {
  margin: 0;
  border: 1px solid var(--grey-300);
  box-shadow: var(--shadow-card);
  background: var(--paper);
}

.cjk-frame iframe {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 0;
}

.cjk-caption {
  padding: calc(var(--u) * 1.5) calc(var(--u) * 2);
  border-top: 1px solid var(--grey-300);
  font-size: 0.75rem;
  color: var(--grey-500);
}

.cjk-profiles {
  list-style: none;
  margin: calc(var(--u) * 3) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--u) * 1);
}

.cjk-chip {
  font-family: var(--sans);
  font-size: 0.75rem;
  color: var(--grey-700);
  background: var(--paper);
  border: 1px solid var(--grey-300);
  border-radius: 999px;
  padding: calc(var(--u) * 0.5) calc(var(--u) * 1.5);
  transition:
    color 220ms ease,
    border-color 220ms ease,
    background 220ms ease,
    transform 220ms ease;
}
.cjk-chip.is-on {
  color: var(--navy);
  border-color: var(--navy);
  background: var(--tint);
  font-weight: 600;
  transform: translateY(-1px);
}
.cjk-live {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: #fff;
  background: var(--risk, #b42318);
  border-radius: 3px;
  padding: 2px 6px;
  animation: cjk-live-pulse 1.6s ease-in-out infinite;
}
@keyframes cjk-live-pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.55;
  }
}
@media (prefers-reduced-motion: reduce) {
  .cjk-live {
    animation: none;
  }
  .cjk-chip {
    transition: none;
  }
}

/* ---------- modes ---------- */
.md-tabs {
  display: flex;
  gap: calc(var(--u) * 4);
  border-bottom: 1px solid var(--grey-300);
  margin-bottom: calc(var(--u) * 4);
  overflow-x: auto;
}
.md-tab {
  font-size: 1rem;
  color: var(--grey-500);
  background: none;
  border: 0;
  border-bottom: 2px solid transparent;
  padding: calc(var(--u)) calc(var(--u) * 0.5) calc(var(--u) * 1.5);
  cursor: pointer;
  white-space: nowrap;
}
.md-tab .md-num {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--grey-300);
  margin-right: calc(var(--u));
}
.md-tab.is-active {
  color: var(--navy);
  border-bottom-color: var(--navy);
  font-weight: 600;
}
.md-tab.is-active .md-num {
  color: var(--navy);
}
.md-panel[hidden] {
  display: none;
}

.md-desc {
  margin-top: calc(var(--u) * 2);
  font-size: 1rem;
  color: var(--grey-700);
}

.md-open {
  margin-left: calc(var(--u));
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--blue);
  white-space: nowrap;
}

/* ---------- start ---------- */
.st-shell {
  position: relative;
  background: var(--navy);
  box-shadow: var(--shadow-card);
}

.st-term {
  margin: 0;
  padding: calc(var(--u) * 3);
  padding-right: calc(var(--u) * 10);
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.st-term code {
  font-family: var(--mono);
  font-size: 0.75rem;
  line-height: 1.7;
  color: var(--paper);
}

.st-line::before {
  content: "$ ";
  color: var(--grey-500);
}

.st-copy {
  position: absolute;
  top: calc(var(--u) * 1.5);
  right: calc(var(--u) * 1.5);
  padding: calc(var(--u) * 0.5) calc(var(--u) * 1.5);
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--paper);
  background: transparent;
  border: 1px solid var(--grey-500);
  border-radius: 4px;
  cursor: pointer;
  transition: border-color 120ms ease;
}

.st-copy:hover {
  border-color: var(--paper);
}

.st-ask {
  margin: calc(var(--u) * 4) 0 calc(var(--u) * 1);
  font-size: 1rem;
  color: var(--grey-700);
}

.st-prompt {
  margin: 0;
  font-size: 1rem;
  font-style: italic;
  color: var(--grey-700);
}

/* ---------- footer ---------- */
.ft-shell {
  border-top: 1px solid var(--grey-300);
  padding-block: calc(var(--u) * 8);
}

.ft-cta {
  margin: 0 0 calc(var(--u) * 3);
  font-size: 1rem;
  color: var(--ink);
}

.ft-actions {
  margin: 0 0 calc(var(--u) * 4);
}

.ft-divider {
  margin: 0 0 calc(var(--u) * 4);
  border: 0;
  border-top: 1px solid var(--grey-300);
}

.ft-small {
  font-size: 0.75rem;
  color: var(--grey-500);
}

.ft-line {
  margin: 0 0 calc(var(--u) * 1);
  font-size: 0.75rem;
  color: var(--grey-500);
}

.ft-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--u) * 2);
  margin: calc(var(--u) * 2) 0 0;
  padding: 0;
}

.ft-links a {
  font-size: 0.75rem;
  color: var(--grey-500);
}

.ft-links a:hover {
  color: var(--navy);
}

/* ---------- scroll-rich layer ---------- */

/* reveal on scroll (main.js adds .js to <html> and .rv to targets;
   gated to no-preference so reduced-motion users see content immediately) */
@media (prefers-reduced-motion: no-preference) {
  .js .rv {
    opacity: 0;
    transform: translateY(24px);
    transition:
      opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
      transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    transition-delay: var(--rv-d, 0ms);
  }
  .js .rv.rv-in {
    opacity: 1;
    transform: none;
  }
}

/* scrollspy */
.site-nav a.is-current {
  color: var(--navy);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* alternating section rhythm */
#live-deck,
#gallery,
#modes {
  background: var(--fill);
}

/* browser chrome frame (carries the border/shadow the bare iframe had) */
.chrome {
  border: 1px solid var(--grey-300);
  border-radius: 10px;
  overflow: hidden;
  background: var(--paper);
  box-shadow: var(--shadow-card);
}
.chrome-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: calc(var(--u) * 1.25) calc(var(--u) * 2);
  background: var(--fill);
}
.chrome-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--grey-300);
  flex: none;
}
.chrome-url {
  margin-left: calc(var(--u));
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--grey-500);
  background: var(--paper);
  border: 1px solid var(--grey-300);
  border-radius: 999px;
  padding: calc(var(--u) * 0.5) calc(var(--u) * 1.5);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}
.chrome iframe {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 0;
  border-top: 1px solid var(--grey-300);
  background: var(--paper);
}
/* the cjk figure no longer carries its own frame — chrome owns it */
.cjk-frame {
  border: 0;
  box-shadow: none;
  background: transparent;
}
.cjk-caption {
  padding: calc(var(--u) * 2) 0 0;
  border-top: 0;
}

/* pipeline: step numbers + track; light in-view reveal (no sticky scroll) */
.pl-step {
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  gap: calc(var(--u));
  transition:
    opacity 0.35s ease,
    border-color 0.35s ease,
    background 0.35s ease,
    transform 0.35s ease;
}
.pl-step::after {
  content: none;
}
.pl-num {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--grey-500);
}
.pl-track {
  display: none;
}
.js #pipeline.pl-live .pl-track {
  display: block;
  height: 2px;
  background: var(--grey-300);
  margin-top: calc(var(--u) * 4);
}
.js #pipeline.pl-live .pl-track-fill {
  display: block;
  height: 100%;
  width: 100%;
  background: var(--navy);
  transform: scaleX(0);
  transform-origin: left;
}
.js #pipeline.pl-live .pl-step {
  opacity: 0.35;
}
.js #pipeline.pl-live .pl-step.pl-active {
  opacity: 1;
  border-color: var(--navy);
  background: var(--tint);
  transform: translateY(-2px);
}
.js #pipeline.pl-live .pl-step.pl-active .pl-num {
  color: var(--navy);
}
@media (prefers-reduced-motion: reduce) {
  .js #pipeline.pl-live .pl-step {
    opacity: 1;
    transition: none;
  }
}

/* gallery filters */
.gal-filters {
  display: none;
}
.js .gal-filters {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--u));
  margin-bottom: calc(var(--u) * 3);
}
.gal-chip {
  font-family: var(--sans);
  font-size: 0.75rem;
  color: var(--grey-700);
  background: var(--paper);
  border: 1px solid var(--grey-300);
  border-radius: 999px;
  padding: calc(var(--u)) calc(var(--u) * 2);
  cursor: pointer;
}
.gal-chip.is-active {
  background: var(--navy);
  border-color: var(--navy);
  color: #fff;
}
.gal-count {
  font-family: var(--mono);
  opacity: 0.7;
}
.gal-card[hidden] {
  display: none;
}

/* ---------- console: chat experience demo ---------- */
#console {
  background: var(--navy);
  padding-block: calc(var(--u) * 10) calc(var(--u) * 12);
}
#console .kicker {
  color: rgba(255, 255, 255, 0.55);
}
#console h2 {
  color: #fff;
  max-width: 36rem;
}
#console .lede {
  color: rgba(255, 255, 255, 0.78);
  max-width: 40rem;
}
.con-intro {
  margin-bottom: calc(var(--u) * 5);
}
.chat-demo {
  max-width: 48rem;
  margin: 0 auto;
  background: #0b1220;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.35);
  transition: opacity 480ms ease;
}
.chat-demo.is-fading {
  opacity: 0.28;
}
.chat-chrome {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: calc(var(--u) * 1.5) calc(var(--u) * 2);
  background: rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.chat-chrome .chrome-dot {
  background: rgba(255, 255, 255, 0.28);
}
.chat-chrome-title {
  margin-left: calc(var(--u));
  font-family: var(--mono);
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.45);
  letter-spacing: 0.02em;
}
.chat-thread {
  display: flex;
  flex-direction: column;
  gap: calc(var(--u) * 3);
  padding: calc(var(--u) * 4);
  min-height: 18rem;
}
.chat-msg[hidden] {
  display: none;
}
.chat-msg {
  display: flex;
  flex-direction: column;
  gap: calc(var(--u) * 0.75);
  max-width: 94%;
  opacity: 0;
  transform: translateY(10px);
}
.chat-msg.is-in {
  opacity: 1;
  transform: none;
  transition:
    opacity 420ms ease,
    transform 420ms cubic-bezier(0.22, 1, 0.36, 1);
}
@media (prefers-reduced-motion: reduce) {
  .chat-demo.is-fading {
    opacity: 1;
    transition: none;
  }
  .chat-msg {
    opacity: 1;
    transform: none;
  }
  .chat-msg.is-in {
    transition: none;
  }
}
.chat-msg-user {
  align-self: flex-end;
  align-items: flex-end;
}
.chat-msg-agent {
  align-self: flex-start;
  align-items: flex-start;
  max-width: 100%;
  width: 100%;
}
.chat-who {
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.4);
}
.chat-bubble {
  margin: 0;
  padding: calc(var(--u) * 2) calc(var(--u) * 2.5);
  border-radius: 12px;
  font-size: 0.95rem;
  line-height: 1.55;
  color: #fff;
  white-space: pre-wrap;
}
.chat-msg-user .chat-bubble {
  background: #2a4a9b;
  border-bottom-right-radius: 4px;
}
.chat-msg-agent .chat-bubble {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom-left-radius: 4px;
  width: 100%;
  box-sizing: border-box;
}
.chat-bubble-status {
  display: flex;
  align-items: center;
  gap: calc(var(--u) * 1.5);
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.85rem;
}
.chat-dots {
  display: inline-flex;
  gap: 4px;
}
.chat-dots i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.55);
  animation: chat-dot 1.1s ease-in-out infinite;
}
.chat-dots i:nth-child(2) {
  animation-delay: 0.15s;
}
.chat-dots i:nth-child(3) {
  animation-delay: 0.3s;
}
@keyframes chat-dot {
  0%,
  80%,
  100% {
    opacity: 0.35;
    transform: translateY(0);
  }
  40% {
    opacity: 1;
    transform: translateY(-2px);
  }
}
.chat-bubble p {
  margin: 0 0 calc(var(--u) * 2);
  max-width: none;
  min-height: 1.55em;
}
.chat-stack {
  list-style: none;
  margin: 0 0 calc(var(--u) * 2);
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: calc(var(--u) * 1.25);
}
.chat-stack[hidden],
.chat-stack:empty {
  display: none;
}
.chat-stack-item {
  margin: 0;
  opacity: 0;
  transform: translateY(10px) scale(0.96);
  border-radius: 5px;
  overflow: hidden;
  background: #fff;
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.28);
}
.chat-stack-item.is-in {
  opacity: 1;
  transform: none;
  transition:
    opacity 380ms ease,
    transform 380ms cubic-bezier(0.22, 1, 0.36, 1);
}
.chat-stack-item.is-on {
  outline: 2px solid #7eb6ff;
  outline-offset: 1px;
}
.chat-stack-thumb {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: #fff;
}
.chat-stack-meta {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 5px 7px;
  background: rgba(11, 18, 32, 0.92);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.chat-stack-num {
  font-family: var(--mono);
  font-size: 0.58rem;
  color: rgba(255, 255, 255, 0.45);
  letter-spacing: 0.04em;
}
.chat-stack-label {
  font-size: 0.62rem;
  color: rgba(255, 255, 255, 0.78);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
@media (prefers-reduced-motion: reduce) {
  .chat-stack-item {
    opacity: 1;
    transform: none;
  }
  .chat-stack-item.is-in {
    transition: none;
  }
}
.chat-slide {
  margin: 0;
  background: #05080f;
  border-radius: 6px;
  overflow: hidden;
  opacity: 0;
  transform: translateY(12px) scale(0.985);
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.chat-slide.is-revealed {
  opacity: 1;
  transform: none;
  transition:
    opacity 560ms ease,
    transform 560ms cubic-bezier(0.22, 1, 0.36, 1);
}
@media (prefers-reduced-motion: reduce) {
  .chat-slide {
    opacity: 1;
    transform: none;
  }
  .chat-slide.is-revealed {
    transition: none;
  }
}
.chat-slide-stage {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #fff;
}
.chat-slide-stage iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  background: #fff;
}
.chat-slide figcaption {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0;
  padding: calc(var(--u)) calc(var(--u) * 1.5);
  font-family: var(--mono);
  font-size: 0.65rem;
  color: rgba(255, 255, 255, 0.45);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
#chat-slide-count {
  color: rgba(255, 255, 255, 0.72);
}
.chat-composer {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: calc(var(--u) * 2) calc(var(--u) * 3);
}
.chat-composer-fake {
  display: block;
  padding: calc(var(--u) * 1.5) calc(var(--u) * 2);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  color: rgba(255, 255, 255, 0.35);
  font-size: 0.85rem;
}
.chat-cta {
  display: flex;
  gap: calc(var(--u) * 2);
  flex-wrap: wrap;
  justify-content: center;
  margin: calc(var(--u) * 5) 0 0;
}
#console .chat-cta .btn-primary {
  background: #fff;
  color: var(--navy);
}
#console .chat-cta .btn-ghost {
  border-color: rgba(255, 255, 255, 0.45);
  color: #fff;
}

/* ---------- examples page (tabbed, no long scroll) ---------- */
.page-examples .ex-main {
  padding-bottom: calc(var(--u) * 8);
}
.ex-head {
  padding-block: calc(var(--u) * 6) calc(var(--u) * 2);
}
.ex-head h1 {
  max-width: 28rem;
}
.ex-tabs {
  display: flex;
  gap: calc(var(--u) * 3);
  border-bottom: 1px solid var(--grey-300);
  margin-top: calc(var(--u) * 4);
  overflow-x: auto;
  scrollbar-width: none;
}
.ex-tabs::-webkit-scrollbar {
  display: none;
}
.ex-tab {
  font-size: 1rem;
  color: var(--grey-500);
  background: none;
  border: 0;
  border-bottom: 2px solid transparent;
  padding: calc(var(--u)) calc(var(--u) * 0.5) calc(var(--u) * 1.5);
  cursor: pointer;
  white-space: nowrap;
}
.ex-tab .ex-num {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--grey-300);
  margin-right: calc(var(--u));
}
.ex-tab.is-active {
  color: var(--navy);
  border-bottom-color: var(--navy);
  font-weight: 600;
}
.ex-tab.is-active .ex-num {
  color: var(--navy);
}
.ex-panel {
  padding-block: calc(var(--u) * 4) calc(var(--u) * 6);
  animation: hd-panel-in 360ms cubic-bezier(0.22, 1, 0.36, 1) both;
}
.ex-panel[hidden] {
  display: none;
}
.pl-more {
  margin: calc(var(--u) * 3) 0 0;
}
.pl-more a {
  color: var(--navy);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid var(--grey-300);
}
.pl-more a:hover {
  border-bottom-color: var(--navy);
}
.site-nav a[aria-current="page"] {
  color: var(--navy);
  font-weight: 600;
}

/* examples: deck language toggle */
.ex-deck-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: calc(var(--u) * 3);
  flex-wrap: wrap;
  margin-bottom: calc(var(--u) * 3);
}
.ex-deck-head .kicker {
  display: block;
}
.ex-deck-head h2 {
  margin: calc(var(--u)) 0 0;
}
.ex-lang {
  display: inline-flex;
  border: 1px solid var(--grey-300);
  border-radius: 6px;
  overflow: hidden;
  background: var(--paper);
}
.ex-lang-btn {
  border: 0;
  background: transparent;
  color: var(--grey-500);
  font-size: 0.75rem;
  padding: calc(var(--u)) calc(var(--u) * 2);
  cursor: pointer;
}
.ex-lang-btn.is-on {
  background: var(--navy);
  color: #fff;
  font-weight: 600;
}
.ex-tab .ex-num {
  display: none;
}