/* falcon.com home page: "What goes into an agent", the first section after the hero.
   One agent card in the middle; nine parts slide in and fill their sockets in the card, one at a
   time, then Publish runs the checks and the version moves Draft → Dev → Live. HTML and CSS only,
   using the tokens and red scale in home.css. The base style is the final frame (every part in,
   Live, checks passed); the 36s loop runs only when the visitor allows motion. */

/* Two registered numbers drive each part: --anat-in (0 away, 1 slotted in) and --anat-now (1 while
   it is the part being added). Unregistered, they still default to the final frame. */
@property --anat-in {
  syntax: "<number>";
  inherits: true;
  initial-value: 1;
}
@property --anat-now {
  syntax: "<number>";
  inherits: true;
  initial-value: 0;
}

.anat-section {
  border-top: 1px solid var(--line);
}
.anat-head {
  max-width: 44rem;
}
.anat-head .section-lede {
  margin-bottom: 2.5rem;
}
.anat {
  margin: 0;
}
.anat figcaption {
  max-width: 44rem;
  margin: 2.5rem auto 0;
  color: var(--text-muted);
  font-size: 0.9875rem;
  text-align: center;
}
.anat-vh {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  border: 0;
}

/* Layout: phones stack the card above the parts; tablets put the parts in two columns under
   the card; wide screens put the card between them, joined by rails. */
.anat-stage {
  --anat-gap: 3rem;
  display: grid;
  gap: 1.5rem;
}
.anat-col {
  display: grid;
  gap: 0.75rem;
  align-content: start;
  margin: 0;
  padding: 0;
  list-style: none;
}
/* Stacked on phones, the two lists read as one. */
@media (max-width: 639px) {
  .anat-right {
    margin-top: -0.75rem;
  }
}
@media (min-width: 640px) {
  .anat-stage {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 1.5rem 1rem;
  }
  .anat-agent {
    grid-column: 1 / -1;
    justify-self: center;
    width: 100%;
    max-width: 24rem;
  }
}
@media (min-width: 1000px) {
  .anat-stage {
    grid-template-columns: minmax(0, 1fr) minmax(17rem, 20rem) minmax(0, 1fr);
    column-gap: var(--anat-gap);
    align-items: center;
  }
  .anat-agent {
    grid-column: 2;
    grid-row: 1;
  }
  .anat-left {
    grid-column: 1;
    grid-row: 1;
  }
  .anat-right {
    grid-column: 3;
    grid-row: 1;
  }
}

/* The agent card */
.anat-agent {
  position: relative;
  padding: 1.25rem;
  border: 2px solid var(--red-700);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: var(--shadow-lift);
}
.anat-agent-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.anat-mark {
  flex: none;
  width: 2.5rem;
  height: 2.5rem;
}
.anat-mark rect {
  fill: var(--red-700);
}
.anat-mark path {
  fill: #ffffff;
}
.anat-agent-id {
  display: grid;
  line-height: 1.3;
}
.anat-agent-name {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.anat-agent-role {
  color: var(--warm-600);
  font-size: 0.8125rem;
}

.anat-versions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.375rem 1.5rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}
.anat-v {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.375rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-high);
  color: var(--text-muted);
  font-size: 0.8125rem;
  font-weight: 600;
  line-height: 1;
}
.anat-v + .anat-v::before {
  content: "→";
  position: absolute;
  left: -1.125rem;
  color: var(--warm-600);
  font-weight: 400;
}
.anat-v.v-live {
  border-color: var(--fill);
  background: var(--fill);
  color: var(--on-primary);
}
.anat-only {
  margin: 0.5rem 0 0;
  color: var(--warm-600);
  font-size: 0.8125rem;
}

/* Sockets: one per part, dashed while empty, filled once the part slots in. */
.anat-socks {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.375rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}
.anat-sock {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 2.5rem;
  padding: 0.25rem 0.375rem;
  border: 1px dashed var(--warm-300);
  border-radius: 8px;
  color: color-mix(
    in srgb,
    var(--red-900) calc(var(--anat-in) * 100%),
    var(--warm-600)
  );
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
  box-shadow: 0 0 0 2px
    color-mix(in srgb, var(--red-400) calc(var(--anat-now) * 100%), transparent);
}
.anat-sock::before {
  content: "";
  position: absolute;
  inset: -1px;
  z-index: -1;
  border: 1px solid var(--red-200);
  border-radius: inherit;
  background: var(--red-50);
  opacity: var(--anat-in);
}
.anat-socks {
  position: relative;
  z-index: 0;
}

.anat-publish {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}
.anat-btn {
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  padding: 0 0.875rem;
  border-radius: 999px;
  background: var(--fill);
  color: var(--on-primary);
  font-size: 0.8125rem;
  font-weight: 600;
}
.anat-check {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.625rem 0.25rem 0.375rem;
  border: 1px solid var(--red-200);
  border-radius: 999px;
  background: var(--red-100);
  color: var(--red-900);
  font-size: 0.8125rem;
  font-weight: 600;
}
.anat-check svg {
  width: 1rem;
  height: 1rem;
  fill: none;
  stroke: var(--red-600);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* The parts */
.anat-part {
  --anat-dx: 0rem;
  --anat-dy: 0.75rem;
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.875rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 0 0 2px
    color-mix(in srgb, var(--red-500) calc(var(--anat-now) * 100%), transparent);
  opacity: var(--anat-in);
  transform: translate(
    calc((1 - var(--anat-in)) * var(--anat-dx)),
    calc((1 - var(--anat-in)) * var(--anat-dy))
  );
}
.anat-ico {
  flex: none;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0.5rem;
  border-radius: 10px;
  background: var(--red-50);
  fill: none;
  stroke: var(--red-600);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.anat-part:nth-child(even) .anat-ico {
  background: var(--red-100);
  stroke: var(--red-700);
}
.anat-text {
  display: grid;
  gap: 0.125rem;
  min-width: 0;
}
.anat-name {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.3;
}
.anat-like {
  color: var(--red-900);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.35;
}
.anat-what {
  margin-top: 0.125rem;
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.45;
}
.anat-authors {
  display: flex;
  margin-top: 0.375rem;
}
.anat-av {
  display: grid;
  place-items: center;
  width: 1.5rem;
  height: 1.5rem;
  border: 2px solid var(--surface);
  border-radius: 50%;
  color: #ffffff;
  font-size: 0.6875rem;
  font-weight: 600;
  line-height: 1;
}
.anat-av + .anat-av {
  margin-left: -0.375rem;
}
.av-a {
  background: var(--av-1);
}
.av-b {
  background: var(--av-3);
  color: var(--on-av-3);
}
.av-c {
  background: var(--av-4);
}

/* Wide screens: each part plugs into a rail beside the card; the rails plug into the card. */
@media (min-width: 1000px) {
  .anat-left .anat-part {
    --anat-dx: -2.5rem;
    --anat-dy: 0rem;
  }
  .anat-right .anat-part {
    --anat-dx: 2.5rem;
    --anat-dy: 0rem;
  }
  .anat-part::after {
    content: "";
    position: absolute;
    top: 1.9rem;
    width: calc(var(--anat-gap) / 2);
    height: 2px;
    background: color-mix(
      in srgb,
      var(--red-400) calc(var(--anat-now) * 100%),
      var(--warm-300)
    );
  }
  .anat-left .anat-part::after {
    left: calc(100% + 1px);
  }
  .anat-right .anat-part::after {
    right: calc(100% + 1px);
  }
  .anat-part:not(:last-child)::before {
    content: "";
    position: absolute;
    top: 1.9rem;
    width: 2px;
    height: calc(100% + 0.75rem);
    background: var(--warm-300);
  }
  .anat-left .anat-part::before {
    left: calc(100% + 1px + var(--anat-gap) / 2 - 1px);
  }
  .anat-right .anat-part::before {
    right: calc(100% + 1px + var(--anat-gap) / 2 - 1px);
  }
  .anat-agent::before,
  .anat-agent::after {
    content: "";
    position: absolute;
    top: 50%;
    width: calc(var(--anat-gap) / 2);
    height: 2px;
    background: var(--accent-line);
  }
  .anat-agent::before {
    right: calc(100% + 2px);
  }
  .anat-agent::after {
    left: calc(100% + 2px);
  }
}

@media (prefers-reduced-motion: no-preference) {
  .anat-part,
  .anat-sock,
  .anat-v,
  .anat-agent,
  .anat-btn,
  .anat-check {
    animation-duration: 36s;
    animation-timing-function: ease-in-out;
    animation-iteration-count: infinite;
    animation-fill-mode: both;
  }
  .a1 {
    animation-name: anat-1;
  }
  .a2 {
    animation-name: anat-2;
  }
  .a3 {
    animation-name: anat-3;
  }
  .a4 {
    animation-name: anat-4;
  }
  .a5 {
    animation-name: anat-5;
  }
  .a6 {
    animation-name: anat-6;
  }
  .a7 {
    animation-name: anat-7;
  }
  .a8 {
    animation-name: anat-8;
  }
  .a9 {
    animation-name: anat-9;
  }
  .anat-agent {
    animation-name: anat-card;
  }
  .anat-v.v-draft {
    animation-name: anat-draft;
  }
  .anat-v.v-dev {
    animation-name: anat-dev;
  }
  .anat-v.v-live {
    animation-name: anat-live;
  }
  .anat-btn {
    animation-name: anat-publish;
  }
  .anat-check {
    animation-name: anat-check;
  }
}

/* Timeline (36s): part n slots in at 1s + 2.8s × (n − 1) and stays the one being added for
   2.8s; Publish pulses at 26.5s, checks pass at 28s, Dev at 28s, Live at 30s; everything holds
   until 34.5s, then clears for the next loop. */
@keyframes anat-1 {
  0%,
  2.8% {
    --anat-in: 0;
    --anat-now: 0;
  }
  5.3%,
  9.2% {
    --anat-in: 1;
    --anat-now: 1;
  }
  10.6%,
  95.8% {
    --anat-in: 1;
    --anat-now: 0;
  }
  98.6%,
  100% {
    --anat-in: 0;
    --anat-now: 0;
  }
}
@keyframes anat-2 {
  0%,
  10.6% {
    --anat-in: 0;
    --anat-now: 0;
  }
  13.1%,
  16.9% {
    --anat-in: 1;
    --anat-now: 1;
  }
  18.3%,
  95.8% {
    --anat-in: 1;
    --anat-now: 0;
  }
  98.6%,
  100% {
    --anat-in: 0;
    --anat-now: 0;
  }
}
@keyframes anat-3 {
  0%,
  18.3% {
    --anat-in: 0;
    --anat-now: 0;
  }
  20.8%,
  24.7% {
    --anat-in: 1;
    --anat-now: 1;
  }
  26.1%,
  95.8% {
    --anat-in: 1;
    --anat-now: 0;
  }
  98.6%,
  100% {
    --anat-in: 0;
    --anat-now: 0;
  }
}
@keyframes anat-4 {
  0%,
  26.1% {
    --anat-in: 0;
    --anat-now: 0;
  }
  28.6%,
  32.5% {
    --anat-in: 1;
    --anat-now: 1;
  }
  33.9%,
  95.8% {
    --anat-in: 1;
    --anat-now: 0;
  }
  98.6%,
  100% {
    --anat-in: 0;
    --anat-now: 0;
  }
}
@keyframes anat-5 {
  0%,
  33.9% {
    --anat-in: 0;
    --anat-now: 0;
  }
  36.4%,
  40.3% {
    --anat-in: 1;
    --anat-now: 1;
  }
  41.7%,
  95.8% {
    --anat-in: 1;
    --anat-now: 0;
  }
  98.6%,
  100% {
    --anat-in: 0;
    --anat-now: 0;
  }
}
@keyframes anat-6 {
  0%,
  41.7% {
    --anat-in: 0;
    --anat-now: 0;
  }
  44.2%,
  48% {
    --anat-in: 1;
    --anat-now: 1;
  }
  49.4%,
  95.8% {
    --anat-in: 1;
    --anat-now: 0;
  }
  98.6%,
  100% {
    --anat-in: 0;
    --anat-now: 0;
  }
}
@keyframes anat-7 {
  0%,
  49.4% {
    --anat-in: 0;
    --anat-now: 0;
  }
  51.9%,
  55.8% {
    --anat-in: 1;
    --anat-now: 1;
  }
  57.2%,
  95.8% {
    --anat-in: 1;
    --anat-now: 0;
  }
  98.6%,
  100% {
    --anat-in: 0;
    --anat-now: 0;
  }
}
@keyframes anat-8 {
  0%,
  57.2% {
    --anat-in: 0;
    --anat-now: 0;
  }
  59.7%,
  63.6% {
    --anat-in: 1;
    --anat-now: 1;
  }
  65%,
  95.8% {
    --anat-in: 1;
    --anat-now: 0;
  }
  98.6%,
  100% {
    --anat-in: 0;
    --anat-now: 0;
  }
}
@keyframes anat-9 {
  0%,
  65% {
    --anat-in: 0;
    --anat-now: 0;
  }
  67.5%,
  71.4% {
    --anat-in: 1;
    --anat-now: 1;
  }
  72.8%,
  95.8% {
    --anat-in: 1;
    --anat-now: 0;
  }
  98.6%,
  100% {
    --anat-in: 0;
    --anat-now: 0;
  }
}

/* The card's border turns logo red once Live. */
@keyframes anat-card {
  0%,
  82.5% {
    border-color: var(--line-strong);
  }
  84.2%,
  95.8% {
    border-color: var(--red-700);
  }
  98.6%,
  100% {
    border-color: var(--line-strong);
  }
}
@keyframes anat-draft {
  0%,
  77.2% {
    border-color: var(--line-strong);
    background-color: var(--surface);
    color: var(--text);
  }
  78.3%,
  100% {
    border-color: var(--line);
    background-color: var(--surface-high);
    color: var(--text-muted);
  }
}
@keyframes anat-dev {
  0%,
  77.2% {
    border-color: var(--line);
    background-color: var(--surface-high);
    color: var(--text-muted);
  }
  78.3%,
  82.5% {
    border-color: var(--red-200);
    background-color: var(--red-100);
    color: var(--red-900);
  }
  84.2%,
  100% {
    border-color: var(--line);
    background-color: var(--surface-high);
    color: var(--text-muted);
  }
}
@keyframes anat-live {
  0%,
  82.5% {
    border-color: var(--line);
    background-color: var(--surface-high);
    color: var(--text-muted);
  }
  84.2%,
  95.8% {
    border-color: var(--fill);
    background-color: var(--fill);
    color: var(--on-primary);
  }
  98.6%,
  100% {
    border-color: var(--line);
    background-color: var(--surface-high);
    color: var(--text-muted);
  }
}
/* Publish pulses twice before the checks pass. */
@keyframes anat-publish {
  0%,
  73.6% {
    box-shadow: 0 0 0 0 transparent;
  }
  75% {
    box-shadow: 0 0 0 6px color-mix(in srgb, var(--red-400) 45%, transparent);
  }
  76.1% {
    box-shadow: 0 0 0 0 transparent;
  }
  77.2% {
    box-shadow: 0 0 0 6px color-mix(in srgb, var(--red-400) 45%, transparent);
  }
  78.3%,
  100% {
    box-shadow: 0 0 0 0 transparent;
  }
}
@keyframes anat-check {
  0%,
  77.2% {
    opacity: 0;
    transform: scale(0.9);
  }
  78.3%,
  95.8% {
    opacity: 1;
    transform: scale(1);
  }
  98.6%,
  100% {
    opacity: 0;
    transform: scale(0.9);
  }
}