/* ==========================================================================
   AI Agent Development — page visuals
   system diagram (hero), agent-run console (how it works), capability words, cinematic system
   ========================================================================== */

/* ==========================================================================
   Hero system diagram: user → agent → tools → APIs → systems
   ========================================================================== */
.sys {
  --px: 0; --py: 0;
  --label-w: clamp(6rem, 10vw, 9rem);
  position: relative;
  max-width: 74rem; margin-inline: auto;
  border: 1px solid rgb(255 255 255 / 0.12);
  border-radius: clamp(1rem, 1.6vw, 1.75rem);
  background: #07070a;
  color: var(--white);
  overflow: hidden;
}
.sys__bar {
  display: flex; align-items: center; gap: 1rem;
  padding: 0.9rem 1.25rem;
  border-bottom: 1px solid rgb(255 255 255 / 0.08);
  font-size: var(--fs-micro); font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase;
  color: rgb(255 255 255 / 0.5);
}
.sys__run { flex: 1; }
.sys__live { display: inline-flex; align-items: center; gap: 0.5rem; color: var(--green); }
.sys__live i { width: 0.45rem; height: 0.45rem; border-radius: 50%; background: currentColor; }
.sys__body {
  padding: clamp(1.5rem, 3vw, 3rem) clamp(1rem, 3vw, 3rem) clamp(2rem, 3.5vw, 3.5rem);
  background-image:
    linear-gradient(rgb(255 255 255 / 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgb(255 255 255 / 0.03) 1px, transparent 1px);
  background-size: 32px 32px;
}
.sys__tier {
  --depth: 0.3;
  display: grid; grid-template-columns: var(--label-w) minmax(0, 1fr); align-items: center;
  translate: calc(var(--px) * var(--depth) * 12px) calc(var(--py) * var(--depth) * 6px);
}
.sys__tier--agent { --depth: 1; }
.sys__tier--tools { --depth: 0.65; }
.sys__tier--systems { --depth: 0.15; }
.sys__label { font-size: var(--fs-micro); font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: rgb(255 255 255 / 0.42); }
.sys__label b { margin-right: 0.6rem; font-weight: 600; color: var(--blue-bright); }
.sys__slot { display: flex; justify-content: center; align-items: center; }

/* vertical connectors with a travelling point */
.sys__link { position: relative; height: clamp(1.6rem, 3vw, 2.5rem); margin-left: var(--label-w); }
.sys__link::before { content: ""; position: absolute; left: 50%; top: 0; bottom: 0; width: 1px; background: linear-gradient(rgb(255 255 255 / 0.1), rgb(255 255 255 / 0.32)); }
.sys__link i { position: absolute; left: 50%; top: 0; width: 6px; height: 100%; margin-left: -3px; }
.sys__link i::before { content: ""; position: absolute; left: 0; top: -3px; width: 6px; height: 6px; border-radius: 50%; background: var(--blue-bright); box-shadow: 0 0 10px var(--blue); opacity: 0; }

.sys__request {
  display: flex; align-items: center; gap: 0.8rem;
  padding: 0.6rem 1.2rem 0.6rem 0.6rem;
  border: 1px solid rgb(255 255 255 / 0.12); border-radius: 999px;
  background: rgb(255 255 255 / 0.05);
  font-size: clamp(0.85rem, 0.72rem + 0.35vw, 1.05rem);
}
.sys__avatar { flex: none; width: 2rem; aspect-ratio: 1; border-radius: 50%; background: linear-gradient(135deg, #9b7cf0, #4f6ff0); }

.sys__agent { gap: clamp(1rem, 4vw, 3.5rem); }
.sys__chip {
  padding: 0.45rem 0.8rem;
  border: 1px solid rgb(255 255 255 / 0.16); border-radius: 999px;
  background: rgb(255 255 255 / 0.03);
  font-size: var(--fs-micro); font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase;
  color: rgb(255 255 255 / 0.72);
}
.sys__core {
  position: relative;
  display: grid; place-items: center;
  width: clamp(5.25rem, 8vw, 7.25rem); aspect-ratio: 1; border-radius: 50%;
  background: radial-gradient(circle at 38% 32%, #2f86ff, #0f55e6);
  font-size: var(--fs-small); letter-spacing: 0.08em; text-transform: uppercase;
}
.sys__core b { position: relative; font-weight: 700; }
.sys__ring { position: absolute; inset: -22%; border-radius: 50%; border: 1px solid rgb(91 150 255 / 0.55); opacity: 0; }
.sys__arc { position: absolute; inset: -32%; width: 164%; height: 164%; fill: #7b5ae6; }

.sys__row { position: relative; display: flex; flex-wrap: wrap; justify-content: center; gap: 0.75rem clamp(0.5rem, 1.2vw, 1rem); }
.sys__row--bus { padding-top: 1.1rem; }
.sys__row--bus::before { content: ""; position: absolute; top: 0; left: 10%; right: 10%; height: 1px; background: rgb(255 255 255 / 0.18); }
.sys__card, .sys__api { position: relative; }
.sys__card::before, .sys__api::before { content: ""; position: absolute; left: 50%; bottom: 100%; width: 1px; height: calc(1.1rem + 1px); background: rgb(255 255 255 / 0.18); }
.sys__card {
  display: inline-flex; align-items: center; gap: 0.55rem;
  padding: 0.7rem 0.95rem;
  border: 1px solid rgb(255 255 255 / 0.12); border-radius: 0.7rem;
  background: rgb(255 255 255 / 0.03);
  font-size: clamp(0.78rem, 0.7rem + 0.22vw, 0.95rem); font-weight: 500;
}
.sys__card svg { width: 1.05rem; height: 1.05rem; color: var(--blue-bright); }
.sys__card.is-hot { background: rgb(58 126 246 / 0.14); border-color: rgb(58 126 246 / 0.5); }
.sys__card::after { content: ""; position: absolute; inset: -1px; border: 1px solid var(--blue-bright); border-radius: inherit; opacity: 0; pointer-events: none; }
.sys__api {
  padding: 0.45rem 0.75rem;
  border: 1px dashed rgb(255 255 255 / 0.18); border-radius: 0.45rem;
  font: 500 clamp(0.72rem, 0.66rem + 0.18vw, 0.86rem)/1.2 ui-monospace, SFMono-Regular, Menlo, monospace;
  color: rgb(255 255 255 / 0.78);
}
.sys__api em { margin-right: 0.45rem; font-style: normal; font-weight: 700; color: var(--blue-bright); }
.sys__row--plain { gap: 0.5rem 1.1rem; }
.sys__row--plain li { display: inline-flex; align-items: center; gap: 1.1rem; font-size: clamp(0.8rem, 0.72rem + 0.22vw, 0.98rem); color: rgb(255 255 255 / 0.55); }
.sys__row--plain li + li::before { content: ""; width: 4px; height: 4px; border-radius: 50%; background: rgb(255 255 255 / 0.25); }

@media (prefers-reduced-motion: no-preference) {
  .js .sys__card, .js .sys__api { opacity: 0; transform: translate3d(0, 0.6rem, 0); }
  .is-loaded .sys__card { opacity: 1; transform: none; transition: opacity 0.6s var(--ease-soft), transform 0.9s var(--ease-out); transition-delay: calc(1.2s + var(--k) * 130ms); }
  .is-loaded .sys__api { opacity: 1; transform: none; transition: opacity 0.6s var(--ease-soft), transform 0.9s var(--ease-out); transition-delay: calc(1.85s + var(--k) * 110ms); }

  .sys__link i { animation: sys-drop 2.6s var(--ease-in-out) infinite; }
  .sys__link:nth-child(4) i { animation-delay: 0.4s; }
  .sys__link:nth-child(6) i { animation-delay: 0.8s; }
  .sys__link:nth-child(8) i { animation-delay: 1.2s; }
  .sys__link i::before { animation: sys-drop-fade 2.6s linear infinite; animation-delay: inherit; }
  .sys__ring { animation: sys-pulse 3.4s ease-out infinite; }
  .sys__arc { animation: sys-spin 26s linear infinite; }
  .sys__request { animation: sys-float 6s ease-in-out infinite alternate; }
  .sys__card::after { animation: sys-scan 7.5s ease-in-out infinite; animation-delay: calc(var(--k) * 1.5s); }
  .sys__live i { animation: sys-blink 1.6s ease-in-out infinite; }
  .d-hero.is-paused .sys *, .d-hero.is-paused .sys *::before, .d-hero.is-paused .sys *::after { animation-play-state: paused; }

  @keyframes sys-drop { from { transform: translateY(0); } to { transform: translateY(100%); } }
  @keyframes sys-drop-fade { 0%, 100% { opacity: 0; } 15%, 85% { opacity: 1; } }
  @keyframes sys-pulse { from { transform: scale(0.82); opacity: 0.9; } to { transform: scale(1.2); opacity: 0; } }
  @keyframes sys-spin { to { transform: rotate(360deg); } }
  @keyframes sys-float { from { transform: translateY(-3px); } to { transform: translateY(3px); } }
  @keyframes sys-scan { 0%, 26%, 100% { opacity: 0; } 7%, 18% { opacity: 1; } }
  @keyframes sys-blink { 50% { opacity: 0.25; } }
}

/* ==========================================================================
   How an agent works — steps + agent-run console
   ========================================================================== */
.flow { position: relative; background: var(--black); color: var(--white); }
.flow__title { margin-top: 1rem; font-size: clamp(2.1rem, 0.9rem + 3vw, 4.5rem); font-weight: 700; line-height: 0.98; letter-spacing: -0.05em; }
.flow__title .mask { display: block; width: fit-content; padding-bottom: 0.12em; margin-bottom: -0.12em; }
.flow__steps { position: relative; padding-left: 2.25rem; }
.flow__rail { position: absolute; left: 0; top: 0.6rem; bottom: 0.6rem; width: 1px; background: rgb(255 255 255 / 0.14); }
.flow__rail i { position: absolute; inset: 0; background: linear-gradient(var(--purple), var(--blue)); transform-origin: 50% 0; transform: scaleY(var(--flow-progress, 0.16)); transition: transform 0.8s var(--ease-out); }
.flow__step { position: relative; display: grid; grid-template-columns: clamp(12rem, 19vw, 19rem) minmax(0, 1fr); align-items: center; column-gap: 1.5rem; }
.flow__btn {
  position: relative;
  display: flex; align-items: baseline; gap: 0.8rem;
  padding-block: clamp(0.2rem, 0.9vh, 0.6rem);
  text-align: left;
  color: rgb(255 255 255 / 0.32);
  transition: color 0.45s, transform 0.7s var(--ease-out);
}
.flow__btn::before {
  content: ""; position: absolute; left: -1.75rem; top: 55%;
  width: 1.1rem; height: 1.5px; background: var(--blue-bright);
  transform: scaleX(0); transform-origin: 0 50%;
  transition: transform 0.6s var(--ease-out);
}
.flow__num { font-size: var(--fs-micro); font-weight: 600; letter-spacing: 0.1em; font-variant-numeric: tabular-nums; }
.flow__name { font-size: clamp(1.6rem, 0.9rem + 2vw, 3.25rem); font-weight: 600; line-height: 1.05; letter-spacing: -0.04em; }
.flow__note { max-width: 22em; font-size: 0.92rem; line-height: 1.45; color: rgb(255 255 255 / 0.62); transition: opacity 0.4s var(--ease-soft), transform 0.6s var(--ease-out); }
.flow__step.is-done .flow__btn { color: rgb(255 255 255 / 0.82); }
.flow__step.is-active .flow__btn { color: var(--blue-bright); transform: translateX(0.5rem); }
.flow__step.is-active .flow__btn::before { transform: none; }
.flow__btn:is(:hover, :focus-visible) { color: var(--white); }

.console { border: 1px solid rgb(255 255 255 / 0.12); border-radius: clamp(0.9rem, 1.3vw, 1.4rem); background: #0b0b0f; overflow: hidden; }
.console__bar {
  display: flex; align-items: center; gap: 1rem;
  padding: 0.85rem 1.2rem;
  border-bottom: 1px solid rgb(255 255 255 / 0.08);
  font-size: var(--fs-micro); font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase;
  color: rgb(255 255 255 / 0.5);
}
.console__bar > span:nth-child(2) { flex: 1; }
.console__status { color: var(--blue-bright); font-variant-numeric: tabular-nums; white-space: nowrap; }
.console__trace { display: grid; align-content: start; gap: 0.5rem; padding: clamp(0.9rem, 1.8vw, 1.5rem); }
.trace {
  display: grid; grid-template-columns: 4.25rem minmax(0, 1fr); gap: 0.3rem 1rem;
  padding: 0.7rem 0.9rem;
  border: 1px solid transparent; border-radius: 0.6rem;
  font: 400 clamp(0.74rem, 0.64rem + 0.24vw, 0.9rem)/1.5 ui-monospace, SFMono-Regular, Menlo, monospace;
  color: rgb(255 255 255 / 0.75);
  transition: opacity 0.45s var(--ease-soft), transform 0.6s var(--ease-out), background-color 0.4s, border-color 0.4s;
}
.trace code { grid-column: 2; font: inherit; overflow-wrap: anywhere; }
.trace__tag { grid-column: 1; padding-top: 0.1em; font-size: 0.85em; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: rgb(255 255 255 / 0.42); }

@media (min-width: 64.0625em) {
  .flow { --mark: 58svh; }
  .flow__stage {
    position: sticky; top: 0;
    height: 100svh;
    display: grid;
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    grid-template-rows: auto minmax(0, 1fr);
    column-gap: clamp(2rem, 5vw, 6rem);
    padding: calc(var(--header-h) + 1vh) max(var(--gutter), (100% - var(--container)) / 2) clamp(1.5rem, 4vh, 3rem);
  }
  .flow__head { grid-column: 1 / -1; }
  .flow__steps { grid-column: 1; align-self: center; }
  .console { grid-column: 2; align-self: center; }
  .console__trace { min-height: clamp(20rem, 46vh, 28rem); }
  .flow__markers { margin-top: -100svh; pointer-events: none; }
  .flow__markers i { display: block; height: var(--mark); }
  .flow__markers i:last-child { height: calc(var(--mark) + 42svh); }

  .flow__note { opacity: 0; transform: translate3d(-0.6rem, 0, 0); pointer-events: none; }
  .flow__step.is-active .flow__note,
  .flow__step:hover .flow__note,
  .flow__btn:focus-visible + .flow__note { opacity: 1; transform: none; }
  .flow__steps:hover .flow__step.is-active:not(:hover) .flow__note { opacity: 0; }

  .trace:not(.is-shown) { opacity: 0; transform: translate3d(0, 0.75rem, 0); }
  .trace.is-shown { opacity: 0.45; }
  .trace.is-current { opacity: 1; background: rgb(58 126 246 / 0.1); border-color: rgb(58 126 246 / 0.35); }
  .trace.is-current .trace__tag { color: var(--blue-bright); }
}

@media (max-width: 64em) {
  .flow { padding-block: clamp(4.5rem, 12vw, 7rem); }
  .flow__stage { width: min(var(--container), 100% - var(--gutter) * 2); margin-inline: auto; }
  .flow__steps { margin-top: 2.5rem; }
  .flow__rail i { transform: scaleY(1); }
  .flow__step { grid-template-columns: 1fr; padding-block: 0.6rem 1rem; }
  .flow .flow__step .flow__btn { color: var(--white); transform: none; }
  .flow__btn::before { display: none; }
  .flow__note { margin-top: 0.2rem; }
  .console { margin-top: 2.5rem; }
  .flow__markers { display: none; }
}

/* ==========================================================================
   Technical capabilities — a sentence of capabilities with a live caption
   ========================================================================== */
.caps { background: var(--black); color: var(--white); padding-block: clamp(5rem, 9vw, 10rem); border-top: 1px solid rgb(255 255 255 / 0.08); }
.caps__inner { display: grid; grid-template-columns: minmax(0, 1fr) minmax(16rem, 24rem); align-items: end; gap: clamp(2.5rem, 5vw, 5rem) clamp(2rem, 6vw, 7rem); }
.caps__head { grid-column: 1 / -1; }
.caps__title { margin-top: 1rem; font-size: clamp(2.1rem, 0.9rem + 3.4vw, 5rem); font-weight: 700; line-height: 0.98; letter-spacing: -0.05em; }
.caps__title .mask { display: block; width: fit-content; padding-bottom: 0.12em; margin-bottom: -0.12em; }
.caps__words {
  grid-column: 1;
  display: flex; flex-wrap: wrap; align-items: baseline;
  font-size: clamp(2rem, 0.8rem + 3.5vw, 5.5rem); font-weight: 600; line-height: 1.1; letter-spacing: -0.045em;
}
.caps__words li { display: inline-flex; align-items: baseline; }
.caps__words li:not(:last-child)::after { content: "/"; margin-inline: 0.22em; font-weight: 300; color: rgb(255 255 255 / 0.14); }
.cap { color: rgb(255 255 255 / 0.28); text-align: left; letter-spacing: inherit; line-height: inherit; font-weight: inherit; transition: color 0.35s; }
.cap sup { position: relative; top: -1.6em; margin-right: 0.3em; font-size: 0.2em; font-weight: 600; letter-spacing: 0.08em; color: rgb(255 255 255 / 0.35); transition: color 0.35s; }
.cap:is(:hover, :focus-visible) { color: rgb(255 255 255 / 0.85); }
.cap.is-active { color: var(--white); }
.cap.is-active sup { color: var(--blue-bright); }
.caps__caption { grid-column: 2; min-height: 11rem; padding-top: 1.25rem; border-top: 1px solid rgb(255 255 255 / 0.2); }
.caps__count { font-size: var(--fs-small); font-weight: 600; letter-spacing: 0.1em; color: var(--blue-bright); font-variant-numeric: tabular-nums; }
.caps__name { margin-top: 0.75rem; font-size: clamp(1.4rem, 1rem + 1vw, 2.2rem); font-weight: 600; letter-spacing: -0.035em; }
.caps__text { margin-top: 0.6rem; line-height: 1.5; color: rgb(255 255 255 / 0.7); }
@media (prefers-reduced-motion: no-preference) {
  .caps__copy.is-swapping { animation: caps-swap 0.5s var(--ease-out); }
  @keyframes caps-swap { from { opacity: 0; transform: translate3d(0, 0.6rem, 0); } }
}
@media (max-width: 64em) {
  .caps__inner { grid-template-columns: 1fr; }
  .caps__caption {
    grid-column: 1; position: sticky; bottom: 1rem; z-index: 2; min-height: 0;
    padding: 1rem 1.2rem; border: 1px solid rgb(255 255 255 / 0.14); border-radius: 1rem;
    background: #111114;
  }
}

/* ==========================================================================
   From intent to execution — cinematic system
   ========================================================================== */
.cine {
  position: relative; isolation: isolate;
  min-height: 100svh;
  display: grid; align-items: end;
  padding-block: clamp(5rem, 10vw, 9rem) clamp(3rem, 6vw, 5rem);
  background: var(--black); color: var(--white);
  overflow: clip;
  view-timeline: --cine;
}
.cine::after { content: ""; position: absolute; inset: auto 0 0; z-index: -1; height: 55%; background: linear-gradient(transparent, rgb(0 0 0 / 0.85)); pointer-events: none; }
.cine__visual { position: absolute; inset: 0; z-index: -1; }
.cine__visual svg { width: 100%; height: 100%; }
.cine__orbits, .cine__fan { transform-box: view-box; transform-origin: 800px 450px; }
.cine__orbits { fill: none; stroke: rgb(255 255 255 / 0.08); }
.cine__fan path { fill: none; stroke: rgb(255 255 255 / 0.13); stroke-width: 1.2; }
.cine__route { fill: none; stroke: var(--blue); stroke-width: 2.5; stroke-dasharray: 1; }
.cine__flow { fill: none; stroke: var(--white); stroke-width: 3.5; stroke-linecap: round; stroke-dasharray: 0.004 0.062; }
.cine__nodes circle { fill: rgb(255 255 255 / 0.4); }
.cine__labels text { font: 500 14px/1 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: 0.06em; fill: rgb(255 255 255 / 0.4); }
.cine__labels .is-hot { fill: var(--blue-bright); }
.cine__hot { fill: var(--blue-bright); }
.cine__hot-ring { fill: none; stroke: var(--blue-bright); stroke-opacity: 0.5; transform-box: fill-box; transform-origin: center; }
.cine__intent { fill: var(--white); }
.cine__intent-ring { fill: none; stroke: rgb(255 255 255 / 0.4); }
.cine__outcome { transform-box: fill-box; transform-origin: center; }
.cine__outcome-ring { fill: none; stroke: rgb(91 150 255 / 0.45); }

.cine__inner { position: relative; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; gap: 2.5rem 4rem; }
.cine__title { font-size: clamp(3rem, 0.6rem + 8.4vw, 11rem); font-weight: 700; line-height: 0.9; letter-spacing: -0.06em; }
.cine__title .mask { display: block; width: fit-content; padding-bottom: 0.2em; margin-bottom: -0.2em; }
.cine__legend { min-width: min(100%, 22rem); border-top: 1px solid rgb(255 255 255 / 0.22); }
.cine__legend li { display: grid; grid-template-columns: 2.5rem 1fr; padding-block: 0.8rem; border-bottom: 1px solid rgb(255 255 255 / 0.12); font-weight: 600; }
.cine__legend b { padding-top: 0.3em; font-size: var(--fs-micro); letter-spacing: 0.1em; color: var(--blue-bright); }
.cine__legend span { grid-column: 2; font-size: 0.88rem; font-weight: 400; color: rgb(255 255 255 / 0.55); }

@media (prefers-reduced-motion: no-preference) {
  .cine__flow { animation: cine-flow 4s linear infinite; }
  .cine__hot-ring { animation: cine-ping 2.4s ease-out infinite; }
  .cine.is-paused :is(.cine__flow, .cine__hot-ring) { animation-play-state: paused; }
  @keyframes cine-flow { to { stroke-dashoffset: -0.33; } }
  @keyframes cine-ping { from { transform: scale(0.7); opacity: 1; } to { transform: scale(1.8); opacity: 0; } }

  /* the system responds to scroll: orbits turn, paths open, the chosen route draws in */
  @supports (animation-timeline: view()) and (animation-range: entry) {
    .cine__orbits { animation: cine-orbit linear both; animation-timeline: --cine; }
    .cine__fan { animation: cine-fan linear both; animation-timeline: --cine; }
    .cine__route { animation: cine-draw linear both; animation-timeline: --cine; animation-range: entry 15% cover 55%; }
    .cine__outcome { animation: cine-grow linear both; animation-timeline: --cine; animation-range: entry 25% cover 60%; }
    @keyframes cine-orbit { from { transform: rotate(-12deg); } to { transform: rotate(12deg); } }
    @keyframes cine-fan { from { transform: translateX(-3%) scaleY(0.82); } to { transform: translateX(3%) scaleY(1.06); } }
    @keyframes cine-draw { from { stroke-dashoffset: 1; } to { stroke-dashoffset: 0; } }
    @keyframes cine-grow { from { transform: scale(0.55); opacity: 0.3; } }
  }
}

@media (max-width: 48em) {
  .cine { display: block; min-height: 0; padding-top: 5rem; }
  .cine::after { display: none; }
  .cine__visual { position: relative; inset: auto; aspect-ratio: 16 / 9; margin-bottom: 2.5rem; }
  .cine__labels { display: none; }

  .sys { --label-w: 0rem; }
  .sys__tier { grid-template-columns: 1fr; row-gap: 0.75rem; justify-items: center; translate: none; }
  .sys__label { text-align: center; }
  .sys__link { margin-left: 0; }
  .sys__agent .sys__chip { display: none; }
  .sys__row--bus { padding-top: 0; }
  .sys__row--bus::before, .sys__card::before, .sys__api::before { display: none; }
  .sys__card { padding: 0.55rem 0.7rem; }
  .sys__request p { font-size: 0.82rem; }
}