.cai-builder {
  position: relative;
  min-height: calc(100vh - 72px);
  padding: clamp(54px, 7vw, 100px) 0 120px;
  color: var(--ink);
}

.cai-builder *,
.cai-builder *::before,
.cai-builder *::after { box-sizing: border-box; }

.cai-builder button,
.cai-builder input,
.cai-builder select,
.cai-builder textarea { font: inherit; }

.cai-builder__hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 48px;
  align-items: end;
  padding-bottom: 52px;
  border-bottom: 1px solid var(--line);
}

.cai-builder__hero h1 {
  max-width: 970px;
  margin: 25px 0 0;
  color: var(--ink);
  font: 500 clamp(3rem, 6.5vw, 6.4rem)/.9 var(--fd);
  letter-spacing: -.072em;
  text-wrap: balance;
}

.cai-builder__hero h1 em {
  color: transparent;
  font-style: normal;
  -webkit-text-stroke: 1px rgba(242,245,255,.55);
}

.cai-builder__hero p {
  max-width: 650px;
  margin-top: 27px;
  color: var(--dim);
  font-size: 15px;
  line-height: 1.75;
}

.cai-builder__safety {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 290px;
  padding: 14px 16px;
  color: var(--dim);
  border: 1px solid var(--line);
  background: rgba(11,18,32,.55);
  font: 400 9px/1.6 var(--fm);
  letter-spacing: .09em;
  text-transform: uppercase;
}

.cai-builder__safety i {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--ice);
  box-shadow: 0 0 18px rgba(125,243,255,.65);
}

.cai-builder__layout {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: clamp(35px, 5vw, 76px);
  padding-top: 54px;
}

.cai-builder__rail {
  position: sticky;
  top: 108px;
  align-self: start;
  min-height: 520px;
  padding-right: 28px;
  border-right: 1px solid var(--line);
}

.cai-builder__rail-label {
  display: block;
  margin-bottom: 24px;
  color: var(--faint);
  font: 500 9px/1 var(--fm);
  letter-spacing: .14em;
  text-transform: uppercase;
}

.cai-builder__rail ol { list-style: none; }

.cai-builder__rail li {
  position: relative;
  display: grid;
  grid-template-columns: 35px 1fr;
  align-items: center;
  min-height: 54px;
  color: var(--faint);
  font: 500 10px/1 var(--fm);
  letter-spacing: .09em;
  text-transform: uppercase;
  transition: color 180ms ease;
}

.cai-builder__rail li::after {
  content: "";
  position: absolute;
  left: 11px;
  top: 39px;
  width: 1px;
  height: 28px;
  background: var(--line);
}

.cai-builder__rail li:last-child::after { display: none; }
.cai-builder__rail li b { font-weight: 500; }
.cai-builder__rail li.is-active { color: var(--ink); }
.cai-builder__rail li.is-active b { color: var(--ice); }
.cai-builder__rail li.is-done { color: var(--dim); }
.cai-builder__rail li.is-done b { color: var(--accent); }

.cai-builder__rail > p {
  margin-top: 38px;
  color: var(--faint);
  font-size: 11px;
  line-height: 1.7;
}

.cai-builder__workspace { min-width: 0; }

.cai-builder__status {
  display: none;
  margin-bottom: 20px;
  padding: 15px 18px;
  color: var(--ink);
  border: 1px solid rgba(255,89,100,.42);
  background: rgba(255,89,100,.09);
  font-size: 13px;
}

.cai-builder__status.is-visible { display: block; }
.cai-builder__status.is-info { border-color: var(--line-strong); background: rgba(109,155,255,.08); }

.cai-builder__panel {
  min-height: 570px;
  padding: clamp(28px, 4vw, 58px);
  border: 1px solid var(--line-strong);
  background: rgba(11,18,32,.58);
  box-shadow: 0 45px 120px rgba(0,0,0,.28);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.cai-builder__panel[hidden] { display: none; }

.cai-builder__panel h2 {
  max-width: 790px;
  margin: 18px 0 0;
  color: var(--ink);
  font: 500 clamp(2.5rem, 5vw, 5rem)/.94 var(--fd);
  letter-spacing: -.062em;
}

.cai-builder__lede {
  max-width: 690px;
  margin: 20px 0 38px;
  color: var(--dim);
  font-size: 14px;
  line-height: 1.75;
}

.cai-builder label {
  display: block;
  margin-bottom: 9px;
  color: var(--ink);
  font: 500 9px/1.4 var(--fm);
  letter-spacing: .1em;
  text-transform: uppercase;
}

.cai-builder input,
.cai-builder select,
.cai-builder textarea {
  width: 100%;
  min-height: 51px;
  padding: 14px 16px;
  color: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: 0;
  outline: 0;
  background: rgba(4,6,11,.68);
  line-height: 1.5;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.cai-builder textarea { min-height: 130px; resize: vertical; }
.cai-builder input::placeholder,
.cai-builder textarea::placeholder { color: var(--faint); }
.cai-builder input:focus,
.cai-builder select:focus,
.cai-builder textarea:focus { border-color: var(--ice); box-shadow: 0 0 0 3px rgba(125,243,255,.09); }
.cai-builder select { color-scheme: dark; }

.cai-builder__examples {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 13px;
}

.cai-builder__examples button {
  padding: 9px 12px;
  color: var(--dim);
  border: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
  font: 500 9px/1 var(--fm);
  letter-spacing: .08em;
  text-transform: uppercase;
}

.cai-builder__examples button:hover { color: var(--ink); border-color: var(--ice); }

.cai-builder__actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 35px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.cai-builder__actions > span {
  color: var(--faint);
  font: 400 9px/1.5 var(--fm);
  letter-spacing: .06em;
  text-transform: uppercase;
}

.cai-builder__primary,
.cai-builder__ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  min-height: 48px;
  padding: 14px 22px;
  border-radius: 11px;
  cursor: pointer;
  font: 650 14px/1 var(--fd);
  text-decoration: none;
  transition: transform 160ms ease, opacity 160ms ease, border-color 160ms ease;
}

.cai-builder__primary {
  color: #04060d;
  border: 0;
  background: var(--grad);
  box-shadow: 0 6px 30px rgba(109,155,255,.3);
}

.cai-builder__ghost {
  color: var(--ink);
  border: 1px solid var(--line-strong);
  background: rgba(4,6,11,.45);
}

.cai-builder__primary:hover,
.cai-builder__ghost:hover { transform: translateY(-2px); }
.cai-builder__primary:disabled { opacity: .38; cursor: not-allowed; transform: none; }
.cai-builder__primary[aria-busy=true] { opacity: .62; cursor: wait; }

.cai-builder__fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.cai-builder__wide { grid-column: 1 / -1; }

.cai-builder__notice {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-top: 26px;
  padding: 18px;
  color: var(--dim);
  border: 1px solid var(--line);
  background: rgba(109,155,255,.06);
  font-size: 12px;
  line-height: 1.65;
}

.cai-builder__notice i {
  display: grid;
  width: 25px;
  height: 25px;
  flex: 0 0 auto;
  place-items: center;
  color: var(--ice);
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  font: 500 11px var(--fm);
}

.cai-builder__notice strong { color: var(--ink); }

.cai-builder__blueprint {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 14px;
}

.cai-builder__blueprint article {
  height: 100%;
  padding: 27px;
  border: 1px solid var(--line);
  background: rgba(4,6,11,.42);
}

.cai-builder__blueprint > div { display: grid; gap: 14px; }
.cai-builder__blueprint article > span,
.cai-builder__reference-card > span {
  color: var(--ice);
  font: 500 8px/1 var(--fm);
  letter-spacing: .13em;
  text-transform: uppercase;
}

.cai-builder__blueprint h3 {
  margin: 17px 0 12px;
  color: var(--ink);
  font: 500 clamp(1.4rem, 2.7vw, 2.3rem)/1 var(--fd);
  letter-spacing: -.045em;
}

.cai-builder__blueprint p,
.cai-builder__blueprint li { color: var(--dim); font-size: 12px; line-height: 1.65; }
.cai-builder__blueprint ul { margin: 17px 0 0; padding-left: 18px; }
.cai-builder__blueprint li { margin-top: 9px; }
.cai-builder__blueprint li::marker { color: var(--ice); }

.cai-builder__flow { margin-top: 25px; border-top: 1px solid var(--line); }
.cai-builder__flow div { display: grid; grid-template-columns: 30px 1fr; gap: 8px; padding: 12px 0; border-bottom: 1px solid var(--line); color: var(--dim); font-size: 12px; }
.cai-builder__flow b { color: var(--ice); font: 500 9px var(--fm); }

.cai-builder__modules { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 19px; }
.cai-builder__modules span { padding: 8px 10px; color: var(--ink); border: 1px solid var(--line-strong); font: 400 8px var(--fm); letter-spacing: .05em; text-transform: uppercase; }

.cai-builder__confirm {
  display: flex;
  align-items: flex-start;
  gap: 13px;
  margin: 25px 0 0;
  padding: 18px;
  border: 1px solid var(--line-strong);
  background: rgba(125,243,255,.04);
  cursor: pointer;
  text-transform: none;
  letter-spacing: 0;
  font: 400 13px/1.6 var(--fb);
}

.cai-builder__confirm input { width: 18px; min-height: 18px; margin-top: 2px; accent-color: var(--ice); }

.cai-builder__honeypot { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.cai-builder__verify-actions { margin-top: 25px; }
.cai-builder__privacy { max-width: 680px; margin-top: 14px; color: var(--faint); font-size: 11px; line-height: 1.65; }
.cai-builder__privacy a { color: var(--ice); text-decoration: underline; text-underline-offset: 3px; }
.cai-builder__code { margin-top: 28px; padding: 25px; border: 1px solid var(--line-strong); background: rgba(4,6,11,.5); }
.cai-builder__code[hidden] { display: none; }
.cai-builder__code > div { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 9px; }
.cai-builder__code input { font: 500 24px var(--fm); letter-spacing: .2em; }
.cai-builder__code p { margin-top: 13px; color: var(--faint); font-size: 11px; }
.cai-builder__code p strong { color: var(--ink); }

.cai-builder__timeline { border-top: 1px solid var(--line); }
.cai-builder__timeline > div { display: grid; grid-template-columns: 50px 1fr; gap: 15px; align-items: center; min-height: 94px; border-bottom: 1px solid var(--line); }
.cai-builder__timeline b { display: grid; width: 32px; height: 32px; place-items: center; color: var(--faint); border: 1px solid var(--line-strong); border-radius: 50%; font: 500 11px var(--fm); }
.cai-builder__timeline span { display: flex; flex-direction: column; gap: 6px; }
.cai-builder__timeline strong { color: var(--ink); font: 500 17px var(--fd); }
.cai-builder__timeline small { color: var(--dim); font-size: 12px; }
.cai-builder__timeline .is-done b { color: #04060d; border-color: var(--ice); background: var(--ice); }
.cai-builder__timeline .is-current b { color: #04060d; border-color: var(--accent); background: var(--accent); box-shadow: 0 0 24px rgba(109,155,255,.35); }

.cai-builder__reference-card { margin-top: 28px; padding: 27px; border: 1px solid var(--line-strong); background: rgba(109,155,255,.07); }
.cai-builder__reference-card strong { display: block; margin-top: 14px; color: var(--ink); font: 500 clamp(1.8rem, 4vw, 3.5rem)/1 var(--fm); letter-spacing: -.04em; }
.cai-builder__reference-card p { margin-top: 12px; color: var(--dim); font-size: 12px; }

@media (max-width: 960px) {
  .cai-builder__hero { grid-template-columns: 1fr; }
  .cai-builder__safety { max-width: none; justify-self: start; }
  .cai-builder__layout { grid-template-columns: 1fr; }
  .cai-builder__rail { position: static; min-height: 0; padding: 0 0 24px; border-right: 0; border-bottom: 1px solid var(--line); }
  .cai-builder__rail ol { display: grid; grid-template-columns: repeat(5, 1fr); }
  .cai-builder__rail li { grid-template-columns: 1fr; gap: 7px; }
  .cai-builder__rail li::after { top: 12px; left: 28px; width: calc(100% - 28px); height: 1px; }
  .cai-builder__rail > p { margin-top: 18px; }
}

@media (max-width: 720px) {
  .cai-builder { padding-top: 48px; }
  .cai-builder__hero h1 { font-size: clamp(2.7rem, 13vw, 4.5rem); }
  .cai-builder__rail li span { font-size: 8px; }
  .cai-builder__panel { min-height: 0; padding: 25px 19px; }
  .cai-builder__panel h2 { font-size: clamp(2.35rem, 11vw, 4rem); }
  .cai-builder__fields,
  .cai-builder__blueprint { grid-template-columns: 1fr; }
  .cai-builder__wide { grid-column: auto; }
  .cai-builder__actions { align-items: stretch; flex-direction: column-reverse; }
  .cai-builder__actions > span { text-align: center; }
  .cai-builder__primary,
  .cai-builder__ghost { width: 100%; }
  .cai-builder__code > div { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .cai-builder *, .cai-builder *::before, .cai-builder *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}