.operate,
.problems,
.stages,
.preview { scroll-margin-top: calc(var(--header) + 0.75rem); }

.story-kicker {
  margin: 0 0 1rem;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #00A8FF;
}
.story-kicker span { color: #146BFF; }

.operate {
  padding: clamp(4.5rem, 9vh, 7rem) var(--inset);
  background: var(--paper);
  color: var(--ink);
}
.operate-intro { max-width: 40rem; }
.operate h2,
.problems h2,
.stages h2,
.preview h2 {
  margin: 0;
  font-family: "Hanken Grotesk", "Segoe UI", sans-serif;
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 0.98;
}
.operate h2 { font-size: clamp(2.2rem, 4.2vw, 3.6rem); max-width: 16ch; }
.operate-lead,
.problems-lead,
.stages-lead,
.preview-lead {
  max-width: 38rem;
  margin: 1.1rem 0 0;
  font-size: 1.05rem;
}
.operate-lead { color: var(--muted); }

.operate-track {
  --step: 0;
  position: relative;
  margin: clamp(2.5rem, 6vh, 4rem) 0 0;
}
.operate-phases {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1.5rem, 3vw, 3rem);
  margin: 0;
  padding: 0;
  list-style: none;
}
.operate-line {
  position: absolute;
  top: 0.62rem;
  left: 0.7rem;
  right: 0.7rem;
  height: 1px;
  background: var(--line);
  pointer-events: none;
}
.operate-line i {
  display: block;
  height: 100%;
  width: 100%;
  background: #146BFF;
  transform: scaleX(clamp(0, calc((var(--step) - 1) / 2), 1));
  transform-origin: left center;
  transition: transform 560ms var(--ease);
}
.operate-phase { min-width: 0; }
.operate-mark {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 1.45rem;
  height: 1.45rem;
  margin: 0 0 1.15rem;
  border: 1px solid #146BFF;
  border-radius: 50%;
  background: var(--paper);
  color: #146BFF;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.58rem;
  letter-spacing: 0.04em;
  transition: background 320ms var(--ease), color 320ms var(--ease);
}
.operate-phase.is-on .operate-mark { background: #146BFF; color: #F5F7FA; }
.operate-label {
  margin: 0 0 0.35rem;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #146BFF;
}
.operate-phase h3,
.growth h3,
.preview-step strong {
  margin: 0;
  font-family: "Hanken Grotesk", "Segoe UI", sans-serif;
  font-weight: 600;
  letter-spacing: -0.03em;
}
.operate-phase h3 { font-size: clamp(1.35rem, 2vw, 1.7rem); }
.operate-phase p { margin: 0.7rem 0 0; color: var(--muted); }
.operate-phase ul {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.45rem;
}
.operate-phase li {
  padding-top: 0.45rem;
  border-top: 1px solid var(--line);
  color: var(--ink);
  font-size: 0.95rem;
}

.problems {
  padding: clamp(4.5rem, 9vh, 7rem) var(--inset);
  background:
    radial-gradient(ellipse 42% 55% at 78% 42%, rgba(20, 107, 255, 0.14), transparent 64%),
    #070B14;
  color: #F5F7FA;
  border-bottom: 1px solid rgba(245, 247, 250, 0.08);
}
.problems h2 { font-size: clamp(2.3rem, 4.4vw, 4rem); max-width: 14ch; }
.problems-lead { color: #9AA6B7; }
.problems-board {
  display: grid;
  grid-template-columns: minmax(16rem, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: start;
  margin-top: clamp(2.2rem, 5vh, 3.5rem);
}
.problem-list { display: grid; min-width: 0; }
.problem-list button {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  gap: 0.8rem;
  width: 100%;
  padding: 0.85rem 0;
  border-top: 1px solid rgba(245, 247, 250, 0.12);
  color: #9AA6B7;
  text-align: left;
  transition: color 320ms var(--ease);
}
.problem-list button:last-child { border-bottom: 1px solid rgba(245, 247, 250, 0.12); }
.problem-list button span:first-child {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: #146BFF;
}
.problem-list button span:last-child {
  font-family: "Hanken Grotesk", "Segoe UI", sans-serif;
  font-size: clamp(1.05rem, 1.4vw, 1.25rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.25;
}
.problem-list button.is-on { color: #F5F7FA; }
.problem-list button.is-on span:last-child { font-weight: 650; }
.problem-view { min-width: 0; }
.problem-solution {
  margin: 0 0 0.7rem;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #00A8FF;
}
.problem-title {
  margin: 0;
  max-width: 16ch;
  font-family: "Hanken Grotesk", "Segoe UI", sans-serif;
  font-size: clamp(1.7rem, 2.6vw, 2.4rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1.05;
}
.problem-copy { max-width: 34rem; margin: 0.9rem 0 0; color: #9AA6B7; }
.problem-frame {
  position: relative;
  height: 17.5rem;
  margin-top: 1.4rem;
  overflow: hidden;
  background: #0A101C;
  border: 1px solid rgba(245, 247, 250, 0.1);
}
.problem-scene {
  position: absolute;
  inset: 0;
  display: grid;
  align-content: center;
  gap: 0.7rem;
  padding: 1.1rem;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 320ms var(--ease), transform 320ms var(--ease);
}
.problem-scene.is-on { opacity: 1; transform: none; }
.scene-bar, .scene-block, .scene-line, .scene-tile, .scene-col, .scene-node, .scene-panel, .scene-bubble {
  display: block;
  border: 1px solid rgba(245, 247, 250, 0.16);
}
.scene-bar { height: 0.7rem; background: rgba(245, 247, 250, 0.04); }
.scene-bar i, .scene-bar b { display: none; }
.scene-block { height: 4.2rem; background: rgba(20, 107, 255, 0.18); }
.scene-line { height: 0.45rem; width: 72%; background: rgba(245, 247, 250, 0.08); }
.scene-line.short { width: 46%; }
.scene-shop, .scene-crm, .scene-flow, .scene-ops, .scene-ai { display: grid; gap: 0.55rem; }
.scene-shop { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.scene-tile { height: 7.2rem; background: rgba(20, 107, 255, 0.12); }
.scene-tile b, .scene-col b, .scene-node, .scene-panel b, .scene-bubble {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.scene-tile { padding: 0.7rem; color: #9AA6B7; }
.scene-crm { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.scene-col { display: grid; align-content: start; gap: 0.4rem; min-height: 8rem; padding: 0.7rem; }
.scene-col b { color: #F5F7FA; }
.scene-col i { height: 1.4rem; background: rgba(20, 107, 255, 0.2); }
.scene-flow { grid-template-columns: 1fr auto 1fr auto 1fr; align-items: center; }
.scene-node, .scene-join { height: 2.4rem; }
.scene-node { display: grid; place-items: center; color: #F5F7FA; background: rgba(20, 107, 255, 0.16); }
.scene-join { width: 1.4rem; border: 0; border-top: 1px solid #146BFF; }
.scene-ops { grid-template-columns: 1.2fr 0.8fr; }
.scene-panel { min-height: 4.6rem; padding: 0.7rem; color: #9AA6B7; }
.scene-panel.wide { grid-column: 1 / -1; min-height: 3.2rem; }
.scene-panel b { display: block; margin-bottom: 0.35rem; color: #F5F7FA; }
.scene-ai { grid-template-columns: 1fr auto 1fr; align-items: center; }
.scene-bubble { padding: 1rem; color: #F5F7FA; }
.scene-bubble.ask { background: rgba(245, 247, 250, 0.04); }
.scene-bubble.act { background: rgba(20, 107, 255, 0.22); }
.scene-arrow { width: 1.4rem; height: 1px; background: #00A8FF; border: 0; }

.stages {
  padding: clamp(4.5rem, 9vh, 7rem) var(--inset);
  background: #070B14;
  color: #F5F7FA;
}
.stages h2 { font-size: clamp(2.3rem, 4.4vw, 4rem); max-width: 14ch; }
.stages-lead { color: #9AA6B7; }
.stage-line {
  --step: 0;
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1.25rem, 3vw, 2.5rem);
  margin: clamp(2.4rem, 5vh, 3.6rem) 0 0;
  padding: 0;
  list-style: none;
}
.stage-line::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: rgba(245, 247, 250, 0.14);
}
.stage-line::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: #146BFF;
  transform: scaleX(clamp(0, calc((var(--step) - 1) / 2), 1));
  transform-origin: left center;
  transition: transform 560ms var(--ease);
}
.growth {
  min-width: 0;
  padding-top: 1.3rem;
  display: flex;
  flex-direction: column;
}
.stage-kicker {
  margin: 0 0 0.8rem;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #9AA6B7;
}
.stage-kicker b { color: #146BFF; font-weight: 500; }
.growth h3 {
  font-size: clamp(2rem, 3vw, 2.8rem);
  transition: color 320ms var(--ease);
}
.growth.is-on h3 { color: #F5F7FA; }
.growth p { margin: 0.75rem 0 0; color: #9AA6B7; }
.growth ul { margin: 1.1rem 0 0; padding: 0; list-style: none; display: grid; gap: 0.4rem; }
.growth li {
  color: #F5F7FA;
  font-size: 0.95rem;
  padding-top: 0.4rem;
  border-top: 1px solid rgba(245, 247, 250, 0.1);
}
.stage-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: flex-start;
  margin-top: auto;
  padding: 0.7rem 1.15rem;
  min-height: 2.85rem;
  background: #146BFF;
  color: #F5F7FA;
  border: 1px solid #146BFF;
  text-decoration: none;
  font-family: "Hanken Grotesk", "Segoe UI", sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: -0.02em;
  transition: background 160ms var(--ease);
}
.stage-cta:hover { background: #0e5ae0; }
.stage-fig {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 0.4rem;
  margin-top: 1.4rem;
  margin-bottom: 1.4rem;
  min-height: 7.5rem;
}
.fig-screen, .fig-node, .fig-ai {
  border: 1px solid rgba(245, 247, 250, 0.16);
  background: #0A101C;
}
.fig-screen { grid-row: span 2; min-height: 7.5rem; background: rgba(20, 107, 255, 0.14); }
.fig-node, .fig-ai {
  display: grid;
  place-items: center;
  color: #9AA6B7;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.growth[data-level="launch"] .fig-node,
.growth[data-level="launch"] .fig-ai { opacity: 0.28; }
.growth[data-level="grow"] .fig-ai { opacity: 0.28; }
.growth[data-level="scale"] .fig-screen { background: rgba(20, 107, 255, 0.28); }
.growth[data-level="scale"] .fig-ai { color: #F5F7FA; border-color: #146BFF; }

.preview {
  padding: clamp(4.5rem, 9vh, 7rem) var(--inset) clamp(5rem, 10vh, 7.5rem);
  background: var(--paper);
  color: var(--ink);
  border-top: 1px solid rgba(20, 22, 28, 0.16);
}
.preview h2 { font-size: clamp(2.2rem, 4.2vw, 3.8rem); max-width: 14ch; }
.preview-lead { color: var(--muted); }
.preview-steps {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.75rem;
  margin: clamp(2rem, 4vh, 3rem) 0 0;
  padding: 0;
  list-style: none;
}
.preview-step {
  width: 100%;
  min-width: 0;
  padding: 0.7rem 0.4rem 0 0;
  color: var(--muted);
  text-align: left;
  border-top: 1px solid var(--line);
}
.preview-step span {
  display: block;
  margin-bottom: 0.35rem;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: #146BFF;
}
.preview-step strong { display: block; font-size: 0.98rem; line-height: 1.25; color: var(--ink); }
.preview-step.is-on { border-top-color: #146BFF; }
.preview-step.is-on strong { font-weight: 700; }
.preview-step.is-done strong { color: var(--ink); }

.concept { margin-top: 1.6rem; }
.concept-label {
  margin: 0 0 0.55rem;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #146BFF;
}
.concept-frame {
  overflow: hidden;
  background: #070B14;
  color: #F5F7FA;
  border: 1px solid rgba(20, 22, 28, 0.16);
}
.concept-chrome {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 2.2rem;
  padding: 0 0.8rem;
  border-bottom: 1px solid rgba(245, 247, 250, 0.1);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.concept-chrome i {
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: rgba(245, 247, 250, 0.28);
}
.concept-chrome b { margin-left: 0.45rem; font-weight: 500; }
.concept-status { margin-left: auto; color: #00A8FF; }
.concept-body {
  display: grid;
  grid-template-columns: 11rem minmax(0, 1fr);
  min-height: 18rem;
}
.concept-nav, .concept-main { min-width: 0; }
.concept-nav {
  display: grid;
  align-content: start;
  gap: 0.55rem;
  padding: 1rem;
  border-right: 1px solid rgba(245, 247, 250, 0.1);
}
.concept-nav span,
.concept-col b,
.concept-activity {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.concept-nav span { color: #9AA6B7; }
.concept[data-state="0"] .concept-nav span,
.concept[data-state="0"] .concept-col b,
.concept[data-state="0"] .concept-activity,
.concept[data-state="0"] .concept-status { color: transparent; }
.concept-main { display: grid; align-content: start; gap: 0.8rem; padding: 1rem; }
.concept-cols { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.55rem; }
.concept-col {
  min-height: 8.5rem;
  padding: 0.7rem;
  border: 1px dashed rgba(245, 247, 250, 0.28);
  transition: background 320ms var(--ease), border-color 320ms var(--ease);
}
.concept-col b { color: #9AA6B7; }
.concept-col i {
  display: block;
  height: 1.15rem;
  margin-top: 0.55rem;
  background: transparent;
  border: 1px solid rgba(245, 247, 250, 0.12);
}
.concept[data-state="1"] .concept-col i,
.concept[data-state="2"] .concept-col,
.concept[data-state="3"] .concept-col,
.concept[data-state="4"] .concept-col,
.concept[data-state="5"] .concept-col { border-style: solid; }
.concept[data-state="2"] .concept-col,
.concept[data-state="3"] .concept-col,
.concept[data-state="4"] .concept-col,
.concept[data-state="5"] .concept-col { background: rgba(20, 107, 255, 0.12); border-color: rgba(245, 247, 250, 0.16); }
.concept[data-state="2"] .concept-col i,
.concept[data-state="3"] .concept-col i,
.concept[data-state="4"] .concept-col i,
.concept[data-state="5"] .concept-col i { background: rgba(245, 247, 250, 0.08); border-color: transparent; }
.concept[data-state="5"] .concept-col { background: rgba(20, 107, 255, 0.22); }
.concept-activity {
  margin: 0;
  color: #9AA6B7;
}
.concept-pins {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.2rem;
  opacity: 0;
  transition: opacity 320ms var(--ease);
}
.concept[data-state="3"] .concept-pins,
.concept[data-state="4"] .concept-pins { opacity: 1; }
.concept-pins span {
  padding: 0.25rem 0.45rem;
  border: 1px solid #00A8FF;
  color: #00A8FF;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.64rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.concept[data-state="4"] .concept-status,
.concept[data-state="5"] .concept-status { color: #F5F7FA; }

@media (max-width: 1024px) {
  .operate-track,
  .stage-line,
  .problems-board { gap: 1.25rem; }
  .preview-step strong { font-size: 0.9rem; }
}

@media (max-width: 800px) {
  .operate-phases,
  .stage-line,
  .problems-board,
  .preview-steps,
  .concept-body { grid-template-columns: 1fr; }
  .operate-line {
    top: 0.7rem;
    bottom: 0.7rem;
    left: 0.68rem;
    right: auto;
    width: 1px;
    height: auto;
  }
  .operate-line i {
    width: 100%;
    height: 100%;
  transform: scaleY(clamp(0, calc((var(--step) - 1) / 2), 1));
  transform-origin: center top;
  }
  .operate-phase { display: grid; grid-template-columns: 1.45rem minmax(0, 1fr); gap: 0.9rem; }
  .operate-mark { margin: 0; }
  .stage-line::before,
  .stage-line::after { display: none; }
  .growth { padding-top: 1.4rem; border-top: 1px solid rgba(245, 247, 250, 0.12); padding-bottom: 0.4rem; }
  .stage-cta { align-self: stretch; text-align: center; }
  .concept-nav { border-right: 0; border-bottom: 1px solid rgba(245, 247, 250, 0.1); grid-template-columns: 1fr 1fr; }
  .problem-frame { height: 15rem; }
  .scene-flow { grid-template-columns: 1fr; }
  .scene-join { width: 1px; height: 0.8rem; justify-self: center; border-top: 0; border-left: 1px solid #146BFF; }
}

@media (prefers-reduced-motion: reduce) {
  .operate-line i,
  .operate-mark,
  .problem-list button,
  .problem-scene,
  .stage-line::after,
  .growth h3,
  .stage-cta,
  .concept-col,
  .concept-pins { transition: none; }
}