/* Incremental change 01: connected sections and fixed original masthead.
   All colors use the existing KN theme variables. */
html { scroll-padding-top: 116px; }
.site-header { position: fixed; }
@media (min-width: 960px) and (min-height: 740px) {
  .stack-enabled:not(.stack-keyboard-mode) .project-card { top: 110px; }
}
.kn-section-intro { max-width: 1000px; margin: 0 auto 48px; text-align: center; }
.kn-section-intro h2 { margin-bottom: 24px; }
.kn-section-intro > p:last-child { max-width: 760px; margin: 0 auto; color: var(--muted); }
.kn-architecture { border-block: 1px solid var(--soft-line); }
.kn-architecture-card {
  max-width: 720px;
  margin-inline: auto;
  padding: 30px 38px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface-deep);
  box-shadow: 0 16px 40px var(--shadow);
}
.kn-card-label {
  display: table;
  margin: 0 auto 30px;
  padding: 7px 16px;
  color: var(--accent);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 30px;
  font-size: 11px;
  letter-spacing: .09em;
  text-transform: uppercase;
}
.kn-connected-list {
  --line-progress: 0;
  list-style: none;
  position: relative;
  padding: 0 0 0 30px;
  margin: 0;
}
.kn-connected-list::before, .kn-connected-list::after {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 4px;
  width: 1px;
  background: var(--line);
}
.kn-connected-list::after {
  background: var(--accent);
  transform: scaleY(var(--line-progress));
  transform-origin: top;
}
.kn-connected-list > li { position: relative; padding: 0 0 35px; }
.kn-connected-list > li:last-child { padding-bottom: 0; }
.kn-connected-list > li::before {
  content: "";
  position: absolute;
  top: 7px;
  left: -30px;
  width: 9px;
  height: 9px;
  border: 1px solid var(--accent);
  border-radius: 50%;
  background: var(--bg);
  z-index: 1;
  transition: background .25s, box-shadow .25s;
}
.kn-connected-list > li.is-current::before {
  background: var(--accent);
  box-shadow: 0 0 0 5px var(--soft-line);
}
.kn-step-number { color: var(--accent); font: 500 11px/1.7 var(--mono); letter-spacing: .08em; }
.kn-connected-list h3 { margin: 6px 0 10px; font-size: 19px; line-height: 1.4; font-weight: 500; }
.kn-connected-list p { color: var(--muted); font-size: 14px; line-height: 1.75; margin: 0; }
.kn-card-footer { border-top: 1px dashed var(--line); text-align: center; color: var(--muted); padding-top: 23px; margin: 28px 0 0; font-size: 14px; }
.kn-section-action { text-align: center; margin-top: 28px; }
.kn-delivery-list { max-width: 770px; margin: 45px auto 0; }
.kn-delivery-list > li { padding-bottom: 44px; }
.kn-delivery-list h3 { font-size: 22px; }
.kn-delivery-list ul { padding-left: 17px; color: var(--muted); font-size: 14px; }
.kn-delivery-list ul li { padding-left: 3px; margin: 8px 0; }
.kn-delivery-list ul li::marker { color: var(--accent); }
@media (max-width: 700px) {
  html { scroll-padding-top: 104px; }
  .kn-section-intro { text-align: left; margin-bottom: 30px; }
  .kn-section-intro > p:last-child { font-size: 14px; }
  .kn-architecture-card { padding: 25px 21px; border-radius: 18px; }
  .kn-connected-list { padding-left: 26px; }
  .kn-connected-list > li::before { left: -26px; }
  .kn-connected-list h3 { font-size: 18px; }
  .kn-connected-list p, .kn-delivery-list ul { font-size: 13px; }
  .kn-card-footer { font-size: 12px; }
  .kn-delivery-list { margin-top: 28px; }
}
@media (prefers-reduced-motion: reduce) {
  .kn-connected-list::after { transform: scaleY(1); }
  .kn-connected-list > li::before { transition: none; }
}