@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&family=Sora:wght@400;500;600;700&display=swap");

:root {
  --font-body: "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  --font-display: "Sora", "IBM Plex Sans", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --bg: #0b0c0f;
  --bg-soft: #0f1216;
  --panel: #10151b;
  --panel-strong: #151b23;
  --text: #e7ecef;
  --muted: #a8b0b9;
  --line: #242c36;
  --line-soft: rgba(255, 255, 255, 0.085);
  --accent: #5ae6c8;
  --accent-2: #ab45c0;
  --accent-3: #1f449f;
  --navy: #051d40;
  --shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
  --wordmark-strong-weight: 640;
  --wordmark-soft-weight: 380;
  --wordmark-strong-color: rgba(231, 236, 239, 0.95);
  --wordmark-soft-color: rgba(231, 236, 239, 0.74);
  --radius-lg: 26px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --site-max: 1180px;
  --measure: 68ch;
  --body-leading: 1.5;
  --heading-leading: 1.0;
  --min-target: 44px;
  --step--1: clamp(0.78rem, 0.74rem + 0.2vw, 0.9rem);
  --step-0: clamp(0.95rem, 0.9rem + 0.25vw, 1.05rem);
  --step-1: clamp(1.08rem, 1rem + 0.4vw, 1.3rem);
  --step-2: clamp(1.35rem, 1.2rem + 0.8vw, 1.8rem);
  --step-3: clamp(1.8rem, 1.5rem + 1.4vw, 2.6rem);
  --step-4: clamp(2.6rem, 2.3rem + 1.8vw, 3.9rem);
  --step-5: clamp(3.2rem, 2.6rem + 2.4vw, 4.6rem);
  --page-pad: clamp(24px, 5vw, 96px);
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-7: 2rem;
  --space-8: 2.5rem;
  --space-9: 3rem;
  --space-10: 3.5rem;
  --space-11: 4.5rem;
  --space-12: 6rem;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: var(--body-leading);
  min-height: 100vh;
  font-size: var(--step-0);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(1000px 500px at 15% -10%, rgba(90, 230, 200, 0.08), transparent 60%),
    linear-gradient(180deg, rgba(11, 12, 15, 0.96), rgba(11, 12, 15, 0.99));
  z-index: -2;
}

.container {
  max-width: var(--site-max);
  margin: 0 auto;
  padding: var(--space-10) var(--page-pad) var(--space-12);
}

.site-header {
  position: sticky;
  top: 0;
  backdrop-filter: none;
  background: rgba(11, 12, 15, 0.96);
  border-bottom: 1px solid rgba(29, 36, 46, 0.5);
  z-index: 10;
}

.nav {
  max-width: var(--site-max);
  margin: 0 auto;
  padding: var(--space-6) var(--page-pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-mark {
  display: inline-flex;
  align-items: baseline;
  font-size: var(--step-3);
}

.wordmark-strong {
  font-weight: var(--wordmark-strong-weight);
  white-space: nowrap;
  color: var(--wordmark-strong-color);
}

.wordmark-soft {
  font-weight: var(--wordmark-soft-weight);
  white-space: nowrap;
  color: var(--wordmark-soft-color);
}

.brand-dot {
  color: var(--accent);
  margin-left: var(--space-1);
}

.nav-links {
  display: flex;
  gap: var(--space-4);
  font-size: var(--step-0);
  color: var(--muted);
  flex-wrap: wrap;
}

.nav-links a {
  text-decoration: none;
  color: inherit;
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-links a.active,
.nav-links a[aria-current="page"] {
  color: var(--text);
  border-bottom: 1px solid var(--accent);
  padding-bottom: var(--space-1);
}

.eco-map {
  display: grid;
  gap: var(--space-4);
  --eco-rail-inset: calc(var(--space-4) - 2px);
  --eco-rule-top: min(20rem, 66%);
  --eco-rule-bottom: min(14rem, 50%);
}

.eco-legend {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, auto);
  gap: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--line-soft);
}

.eco-legend--compact {
  gap: var(--space-3);
  padding-bottom: var(--space-2);
}

.eco-legend--minor {
  padding-top: var(--space-4);
  padding-bottom: 0;
  border-bottom: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  margin-top: calc(var(--space-4) * -1);
}

.eco-legend-col {
  display: grid;
  gap: var(--space-2);
}

.eco-legend-col--right {
  border-left: 1px solid rgba(255, 255, 255, 0.08);
  padding-left: var(--space-4);
}

.eco-legend-label {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(231, 236, 239, 0.7);
}

.eco-legend-meta {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  color: rgba(231, 236, 239, 0.62);
}

.eco-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.eco-chip {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.25rem 0.55rem;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  color: rgba(231, 236, 239, 0.78);
  border: 1px solid rgba(36, 44, 54, 0.75);
  background: rgba(16, 21, 27, 0.6);
}

.story-ledger {
  display: grid;
  --story-ledger-offset: var(--space-5);
  --story-ledger-spine-width: 2px;
  --story-ledger-rail-width: 2px;
  --story-ledger-track-gap: 0;
  gap: var(--space-5);
}

.story-ledger-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--story-ledger-track-gap);
  align-items: start;
}

.story-ledger-story {
  position: relative;
  border: none;
  border-radius: 0;
  padding: var(--space-4) var(--space-5);
  background: rgba(15, 18, 22, 0.14);
  padding-left: var(--space-5);
  padding-right: calc(var(--space-5) + var(--story-ledger-offset));
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-right: 0;
  text-align: right;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.story-ledger-story::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  right: var(--story-ledger-offset);
  width: var(--story-ledger-rail-width);
  border-radius: 999px;
  background: rgba(171, 69, 192, 0.52);
  z-index: 2;
}

.story-ledger-story::after {
  content: none;
}

.story-ledger-story-label {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(231, 236, 239, 0.68);
  margin-bottom: var(--space-2);
}

.story-ledger-story p {
  margin: 0;
  color: rgba(231, 236, 239, 0.82);
  font-size: var(--step-0);
  max-width: 44ch;
}

.story-ledger-story-copy {
  margin: 0;
  color: rgba(231, 236, 239, 0.82);
  font-size: var(--step-0);
  max-width: 42ch;
  margin-left: auto;
}

.story-ledger-ledger {
  position: relative;
  padding-left: 0;
  z-index: 1;
}

.story-ledger-ledger::before {
  content: "";
  position: absolute;
  left: 0;
  top: calc(-1 * var(--space-5));
  bottom: calc(-1 * var(--space-5));
  width: var(--story-ledger-spine-width);
  background: rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  z-index: 0;
}

.story-ledger-row:first-child .story-ledger-ledger::before {
  top: var(--space-3);
}

.story-ledger-row--last .story-ledger-ledger::before {
  bottom: var(--space-3);
}

.story-ledger-ledger .fc-node {
  margin: 0;
  background: rgba(15, 18, 22, 0.14);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  border-left-width: var(--story-ledger-rail-width);
  margin-left: var(--story-ledger-offset);
  position: relative;
  z-index: 2;
}

.story-ledger-ledger .fc-checkpoint {
  margin: var(--space-2) 0 0 var(--story-ledger-offset);
  padding-left: calc(var(--space-4) - 2px);
  border-left: 2px solid rgba(255, 255, 255, 0.12);
  position: relative;
  z-index: 2;
}

.story-ledger-ledger .fc-checkpoint::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--story-ledger-offset));
  top: 50%;
  width: var(--story-ledger-offset);
  height: 1px;
  transform: translateY(-50%);
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.16),
    rgba(255, 255, 255, 0.06)
  );
  z-index: 1;
}

.story-ledger-ledger .fc-node::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--story-ledger-offset));
  top: 50%;
  width: var(--story-ledger-offset);
  height: 1px;
  transform: translateY(-50%);
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.18),
    rgba(255, 255, 255, 0.06)
  );
  z-index: 1;
}

.story-ledger-ledger .fc-node::after {
  content: none;
}

.story-ledger-ledger .fc-node__flow {
  white-space: normal;
  overflow: visible;
  text-overflow: clip;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.story-ledger-row--last .story-ledger-ledger .fc-node {
  border-left-color: rgba(90, 230, 200, 0.42);
}

.eco-context-inline {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--line-soft);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--space-4);
}

.eco-context-inline .eco-chip-row {
  margin-top: var(--space-2);
}

.eco-context-inline-right {
  text-align: left;
}

.eco-context-inline-right .eco-legend-meta {
  margin-top: var(--space-2);
}

.eco-steps {
  list-style: none;
  display: grid;
  gap: var(--space-5);
  position: relative;
  padding-left: var(--space-8);
}

.eco-steps::before {
  content: "";
  position: absolute;
  left: calc(var(--space-8) - 22px);
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: rgba(36, 44, 54, 0.75);
}

.eco-step {
  position: relative;
  display: grid;
  gap: var(--space-3);
}

.eco-step::before {
  content: "";
  position: absolute;
  left: calc(var(--space-8) - 28px);
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: rgba(231, 236, 239, 0.2);
  border: 1px solid rgba(90, 230, 200, 0.55);
  box-shadow: 0 0 0 3px rgba(90, 230, 200, 0.08);
}

.eco-node {
  position: relative;
  display: grid;
  gap: 0.25rem;
  padding: var(--space-4) var(--space-4);
  border-radius: 0;
  border: none;
  background: linear-gradient(
    90deg,
    rgba(15, 18, 22, 0.22),
    rgba(15, 18, 22, 0) 78%
  );
  padding-left: var(--eco-rail-inset);
  border-left: 2px solid rgba(255, 255, 255, 0.14);
}

.eco-node::before,
.eco-node::after {
  content: "";
  position: absolute;
  left: 0;
  height: 2px;
  width: var(--eco-rule-top);
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.095),
    rgba(255, 255, 255, 0) 88%
  );
}

.eco-node::before {
  top: 0;
}

.eco-node::after {
  bottom: 0;
  width: var(--eco-rule-bottom);
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.08),
    rgba(255, 255, 255, 0) 88%
  );
}

.eco-step-title {
  font-family: var(--font-display);
  font-weight: 650;
  font-size: var(--step-1);
  line-height: 1.05;
}

.eco-step-meta {
  color: rgba(231, 236, 239, 0.66);
  font-size: var(--step--1);
  max-width: 56ch;
}

.eco-receipt-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding-left: var(--eco-rail-inset);
}

.eco-receipt-chip {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.3rem 0.6rem;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  color: rgba(90, 230, 200, 0.92);
  border: 1px solid rgba(90, 230, 200, 0.28);
  background: rgba(6, 18, 15, 0.55);
}

.eco-map--expanded {
  grid-template-columns: minmax(0, 1fr);
}

.eco-interfaces {
  display: grid;
  gap: var(--space-3);
  padding-top: var(--space-5);
  border-top: 1px solid var(--line-soft);
}

.eco-interface {
  position: relative;
  display: grid;
  gap: 0.25rem;
  padding: var(--space-4);
  border-radius: 0;
  border: none;
  background: linear-gradient(
    90deg,
    rgba(15, 18, 22, 0.2),
    rgba(15, 18, 22, 0) 78%
  );
  padding-left: var(--eco-rail-inset);
  border-left: 2px solid rgba(255, 255, 255, 0.12);
}

.eco-interface::before,
.eco-interface::after {
  content: "";
  position: absolute;
  left: 0;
  height: 2px;
  width: min(18rem, 62%);
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.085),
    rgba(255, 255, 255, 0) 88%
  );
}

.eco-interface::before {
  top: 0;
}

.eco-interface::after {
  bottom: 0;
  width: min(12rem, 46%);
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.07),
    rgba(255, 255, 255, 0) 88%
  );
}

.eco-interface--building {
  border-left-color: rgba(171, 69, 192, 0.38);
}

.eco-interface-title {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(231, 236, 239, 0.72);
}

.eco-interface-meta {
  color: rgba(231, 236, 239, 0.6);
  font-size: var(--step--1);
}

@media (max-width: 900px) {
  .eco-legend {
    grid-template-columns: 1fr;
  }
  .eco-steps {
    padding-left: var(--space-7);
  }
  .eco-steps::before {
    left: calc(var(--space-7) - 22px);
  }
  .eco-step::before {
    left: calc(var(--space-7) - 28px);
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: 999px;
  font-family: inherit;
  font-size: inherit;
  font-weight: 600;
  min-height: var(--min-target);
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: #06120f;
  box-shadow: none;
  border: 1px solid rgba(90, 230, 200, 0.45);
}

.btn-primary:hover {
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  border: 1px solid rgba(90, 230, 200, 0.25);
  color: var(--text);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-9);
  align-items: center;
  padding: var(--space-12) 0 var(--space-10);
  animation: fade-up 0.8s ease both;
}

.hero > * {
  min-width: 0;
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-4);
  line-height: var(--heading-leading);
  margin-bottom: var(--space-4);
  max-width: min(26ch, 100%);
  text-wrap: balance;
  overflow-wrap: break-word;
}

.hero-title .hero-accent { color: var(--accent); }

.hero--primary .hero-title {
  font-size: var(--step-5);
}

@media (max-width: 900px) {
  .hero--primary .hero-title {
    font-size: var(--step-4);
  }
}

.hero-subtitle {
  color: var(--muted);
  font-size: var(--step-1);
  max-width: var(--measure);
  margin-bottom: var(--space-4);
  text-wrap: balance;
}

.hero-note {
  color: var(--muted);
  font-size: var(--step-0);
  max-width: var(--measure);
}

/* Action clusters are used in hero and inside sections. Keep the base treatment
   consistent, then scope spacing per context to avoid drift. */
.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  align-items: center;
}

.hero .hero-actions {
  margin: var(--space-6) 0 var(--space-4);
}

.section .hero-actions {
  margin-top: var(--space-5);
}

.kicker,
.panel-label,
.map-label {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.kicker {
  margin-bottom: var(--space-3);
}

.panel-label {
  letter-spacing: 0.2em;
}

.hero-map {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
  padding-top: var(--space-4);
  border-top: 1px solid var(--line-soft);
  justify-items: start;
  width: 100%;
  max-width: min(var(--measure), 100%);
  font-family: var(--font-mono);
}

.map-divider {
  width: 100%;
  height: 1px;
  background: var(--line-soft);
}

.map-block {
  display: grid;
  gap: var(--space-2);
}

.status-line {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  font-weight: 400;
  /* Hero-map lines should be legible like UI, not dim like body-muted copy. */
  color: rgba(231, 236, 239, 0.82);
  letter-spacing: 0.02em;
  line-height: 1.65;
  font-variant-ligatures: none;
  font-feature-settings: "liga" 0, "calt" 0;
  overflow-wrap: anywhere;
}

.status-line.strong {
  /* Keep `.strong` for semantic hierarchy, but do not introduce a new type treatment. */
  color: rgba(231, 236, 239, 0.82);
  font-weight: 400;
}

.section {
  margin-top: var(--space-12);
  background: transparent;
  border: none;
  padding: 0;
}

.section.ghost-panel {
  position: relative;
  padding: var(--space-8) 0;
  border-top: none;
}

.section.ghost-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: auto;
  height: 1px;
  /* Keep dividers intentional, not template-wide. Align to reading measure + rail. */
  width: min(100%, calc(var(--measure) + 16ch));
  background: linear-gradient(
    90deg,
    var(--line-soft),
    rgba(255, 255, 255, 0.035) 34%,
    rgba(255, 255, 255, 0)
  );
  pointer-events: none;
}

.section.ghost-panel.install-strip {
  /* Status is communicated by copy; do not introduce a one-off card component. */
  padding: var(--space-8) 0;
  border-bottom: none;
  background: transparent;
  border-radius: 0;
}

.section.ghost-panel.install-strip.section-split {
  gap: clamp(var(--space-6), 3vw, var(--space-10));
  grid-template-columns: 1fr;
  align-items: start;
}

.section.ghost-panel.install-strip .hero-actions {
  margin: 0;
}

.install-callout {
  max-width: var(--measure);
  margin: 0 auto;
  text-align: center;
  display: grid;
  gap: var(--space-4);
}

.install-callout .hero-actions {
  justify-content: center;
  margin-top: var(--space-4);
}

.section-split {
  display: grid;
  grid-template-columns: 1fr 42%;
  gap: 5rem;
  align-items: start;
}

.section-head {
  max-width: var(--measure);
}

.section-head .mechanism-body {
  margin: 0 0 var(--space-3);
}

.section-head .mechanism-body:last-of-type {
  margin-bottom: 0;
}

.story-rail {
  margin-top: var(--space-4);
  padding-left: calc(var(--space-4) - 2px);
  border-left: 2px solid rgba(171, 69, 192, 0.42);
  display: grid;
  gap: var(--space-2);
}

.story-rail-title {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(231, 236, 239, 0.7);
}

.section-body {
  display: grid;
  gap: var(--space-4);
  margin-top: calc(var(--space-10) + var(--space-6));
}

.rail-list {
  display: grid;
  gap: var(--space-4);
}

.rail-item {
  border-top: none;
  padding-top: 0;
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--line-soft);
}

.rail-item:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.rail-title {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--space-2);
}

.rail-meta {
  color: var(--muted);
  font-size: var(--step-0);
}

.section h2 {
  font-family: var(--font-display);
  font-size: var(--step-2);
  line-height: var(--heading-leading);
  margin-bottom: var(--space-4);
  text-wrap: balance;
}

.section p {
  color: var(--muted);
  margin-bottom: var(--space-3);
  max-width: var(--measure);
}

.flow {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  /* Flow blocks are UI, not body copy; keep them crisp and consistent with the hero map. */
  color: rgba(231, 236, 239, 0.82);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
  overflow-x: hidden;
  font-variant-ligatures: none;
}

.flow.flowchart {
  /* Avoid "box-in-a-box": flowcharts already contain ASCII frames. */
  border: none;
  background: linear-gradient(
    90deg,
    rgba(15, 18, 22, 0.16),
    rgba(15, 18, 22, 0) 78%
  );
  border-radius: 0;
  padding: var(--space-2) 0 var(--space-2) calc(var(--space-4) - 1px);
  padding-right: 0;
  border-left: 1px solid rgba(255, 255, 255, 0.08);
  color: rgba(231, 236, 239, 0.76);
  line-height: 1.18;
  white-space: pre;
  overflow-x: hidden;
  text-shadow: none;
}

.fc-stack {
  display: flex;
  flex-direction: column;
  /* Connectors provide vertical rhythm. Using flex-gap breaks the spine visually. */
  gap: 0;
  align-items: stretch;
  max-width: 100%;
  overflow-x: hidden;
  max-width: 32rem;
  position: relative;
  isolation: isolate;
  padding-left: var(--space-6);
}

.fc-stack::before {
  content: "";
  position: absolute;
  left: var(--space-6);
  top: var(--space-3);
  bottom: var(--space-3);
  width: 1px;
  background: rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  z-index: 0;
}

.fc-stack--list {
  gap: var(--space-5);
  padding-left: 0;
}

.fc-stack--list::before {
  content: none;
}

.fc-stack--list .fc-connector {
  display: none;
}

.fc-stack--mechanism {
  --mechanism-offset: var(--space-3);
  padding-left: 0;
  gap: var(--space-2);
  max-width: none;
}

.fc-stack--mechanism::before {
  left: 0;
  width: 2px;
  background: rgba(255, 255, 255, 0.22);
}

.fc-stack--mechanism .fc-connector {
  display: none;
}

.fc-stack--mechanism .fc-node {
  margin-left: var(--mechanism-offset);
  padding: var(--space-2) var(--space-3);
  padding-left: calc(var(--space-3) - 2px);
  border-left-width: 2px;
  background: rgba(15, 18, 22, 0.14);
}

.fc-stack--mechanism .fc-node::before {
  left: calc(-1 * var(--mechanism-offset));
  top: 50%;
  width: var(--mechanism-offset);
  height: 1px;
  transform: translateY(-50%);
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.18),
    rgba(255, 255, 255, 0.06)
  );
}

.fc-stack--mechanism .fc-node::after {
  content: none;
}

.fc-stack--mechanism .fc-checkpoint {
  margin: 0 0 0 var(--mechanism-offset);
  padding-left: calc(var(--space-4) - 2px);
  border-left: 2px solid rgba(255, 255, 255, 0.12);
}

.fc-stack--mechanism .fc-checkpoint::before {
  left: calc(-1 * var(--mechanism-offset));
  width: var(--mechanism-offset);
  height: 1px;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.16),
    rgba(255, 255, 255, 0.06)
  );
}

.fc-stack--mechanism > .fc-node:last-of-type {
  border-left-color: rgba(90, 230, 200, 0.42);
}

.fc-stack--mechanism .fc-node--receipt {
  --receipt-indent: var(--space-4);
  margin-left: calc(var(--mechanism-offset) + var(--receipt-indent));
}

.fc-stack--mechanism .fc-node--receipt::before {
  left: calc(-1 * (var(--mechanism-offset) + var(--receipt-indent)));
  width: calc(var(--mechanism-offset) + var(--receipt-indent));
}

.fc-node {
  position: relative;
  border: none;
  border-radius: 0;
  padding: var(--space-4) var(--space-5);
  background: linear-gradient(
    90deg,
    rgba(15, 18, 22, 0.22),
    rgba(15, 18, 22, 0) 78%
  );
  padding-left: calc(var(--space-5) - 2px);
  border-left: 3px solid rgba(255, 255, 255, 0.24);
  z-index: 2;
}

.fc-node::before,
.fc-node::after {
  content: "";
  position: absolute;
  left: 0;
  height: 2px;
  /* Partial rules keep the node from reading as a "boxed card", but need enough weight for sunlight. */
  width: min(26rem, 78%);
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.1),
    rgba(255, 255, 255, 0.0) 88%
  );
}

.fc-node::before {
  top: 0;
}

.fc-node::after {
  bottom: 0;
  width: min(22rem, 64%);
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.085),
    rgba(255, 255, 255, 0.0) 88%
  );
}

.fc-node__label {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--space-2);
}

.fc-node__meta {
  color: var(--muted);
  font-size: var(--step-0);
  margin-bottom: var(--space-3);
  max-width: 48ch;
}

.fc-node__flow {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  color: rgba(231, 236, 239, 0.82);
  word-wrap: break-word;
  overflow-wrap: break-word;
  max-width: 100%;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-variant-ligatures: none;
}

.fc-node__flow + .fc-node__flow {
  margin-top: var(--space-2);
}

.fc-checkpoint {
  position: relative;
  margin: var(--space-2) 0 var(--space-2) var(--space-5);
  padding: var(--space-1) 0 var(--space-1) calc(var(--space-4) - 2px);
  border-left: 2px solid rgba(255, 255, 255, 0.1);
  display: grid;
  gap: 0.2rem;
  z-index: 1;
}

.fc-checkpoint::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--space-5));
  top: 50%;
  width: var(--space-5);
  height: 2px;
  transform: translateY(-50%);
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.14),
    rgba(255, 255, 255, 0.04)
  );
}

.fc-stack:not(.fc-stack--list) > .fc-node:last-of-type {
  border-left-color: rgba(90, 230, 200, 0.42);
}

.fc-stack:not(.fc-stack--list) > .fc-node:last-of-type::before {
  background: linear-gradient(
    90deg,
    rgba(90, 230, 200, 0.2),
    rgba(90, 230, 200, 0) 88%
  );
}

.fc-stack:not(.fc-stack--list) > .fc-node:last-of-type::after {
  background: linear-gradient(
    90deg,
    rgba(90, 230, 200, 0.16),
    rgba(90, 230, 200, 0) 88%
  );
}

.fc-connector {
  height: var(--space-5);
  display: block;
  position: relative;
  z-index: 1;
}

.fc-connector::before {
  content: none;
}

.fc-connector::after {
  content: none;
}

.fc-stack--list .fc-checkpoint {
  margin: var(--space-2) 0;
  padding: var(--space-1) 0 var(--space-1) calc(var(--space-4) - 2px);
  border-left: 2px solid rgba(255, 255, 255, 0.1);
  margin-left: 0;
}

.fc-stack--list .fc-checkpoint::before {
  content: none;
}

.fc-checkpoint__label {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(231, 236, 239, 0.64);
}

.fc-checkpoint__value {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  color: rgba(231, 236, 239, 0.82);
  line-height: 1.2;
  overflow-wrap: anywhere;
}

/* Ecosystem variant - extends mechanism */
.fc-stack--ecosystem {
  --mechanism-offset: var(--space-6);
  padding-left: var(--mechanism-offset);
}

.fc-stack--ecosystem::before {
  left: var(--mechanism-offset);
}

.fc-stack--ecosystem .fc-connector {
  height: var(--space-4);
}

.fc-stack--ecosystem .fc-node {
  margin: 0 0 0 var(--mechanism-offset);
  padding-left: calc(var(--space-4) - 2px);
  border-left: 2px solid rgba(255, 255, 255, 0.16);
}

.fc-stack--ecosystem .fc-node::before {
  left: calc(-1 * var(--mechanism-offset));
  width: var(--mechanism-offset);
  height: 1px;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.16),
    rgba(255, 255, 255, 0.06)
  );
}

.fc-stack--ecosystem .fc-node::after {
  content: none;
}

.fc-stack--ecosystem .fc-checkpoint {
  position: relative;
  margin: var(--space-3) 0 var(--space-3) var(--mechanism-offset);
  padding: 0;
  border: none;
  display: flex;
  align-items: center;
}

/* Vertical line continues through checkpoint */
.fc-stack--ecosystem .fc-checkpoint::before {
  content: "";
  position: absolute;
  left: calc(var(--space-4) - 2px);
  top: calc(-1 * var(--space-3));
  width: 2px;
  height: calc(100% + var(--space-6));
  background: rgba(255, 255, 255, 0.12);
}

/* Horizontal line to the left */
.fc-stack--ecosystem .fc-checkpoint::after {
  content: "";
  position: absolute;
  right: calc(100% - var(--space-4) + 2px);
  top: 50%;
  width: var(--space-8);
  height: 2px;
  background: linear-gradient(
    270deg,
    rgba(90, 230, 200, 0.32),
    rgba(90, 230, 200, 0.12)
  );
}

.fc-stack--ecosystem .fc-checkpoint__label,
.fc-stack--ecosystem .fc-checkpoint__value {
  position: absolute;
  right: calc(100% + var(--space-4));
  text-align: right;
}

.fc-stack--ecosystem .fc-checkpoint__label {
  top: calc(-1 * var(--step--1) - 2px);
}

.fc-stack--ecosystem .fc-checkpoint__value {
  top: calc(var(--step--1) + 2px);
}

/* Branch - the T shape for cross-boundary */
.fc-branch {
  position: relative;
  display: flex;
  align-items: flex-start;
  margin-left: var(--mechanism-offset);
  padding: var(--space-4) 0;
}

/* Vertical continuation line through the branch */
.fc-branch::before {
  content: "";
  position: absolute;
  top: 0;
  left: calc(var(--space-4) - 2px);
  width: 2px;
  height: 100%;
  background: rgba(255, 255, 255, 0.12);
}

/* Horizontal line to branch node */
.fc-branch__line {
  position: absolute;
  top: 50%;
  left: var(--space-4);
  width: var(--space-8);
  height: 2px;
  background: linear-gradient(
    90deg,
    rgba(90, 230, 200, 0.32),
    rgba(90, 230, 200, 0.12)
  );
}

.fc-branch__node {
  margin-left: calc(var(--space-4) + var(--space-8) + var(--space-2));
  padding: var(--space-3) var(--space-4);
  border-left: 2px solid rgba(90, 230, 200, 0.32);
  background: linear-gradient(
    90deg,
    rgba(90, 230, 200, 0.08),
    rgba(90, 230, 200, 0) 78%
  );
}

.fc-branch__node .fc-node__label {
  color: rgba(90, 230, 200, 0.82);
}

.fc-branch__node .fc-node__flow {
  color: rgba(231, 236, 239, 0.72);
}

/* External nodes - mint styling for cross-boundary content (stays in main flow) */
.fc-node--external {
  border-left-color: rgba(90, 230, 200, 0.32);
  background: linear-gradient(
    90deg,
    rgba(90, 230, 200, 0.06) 0%,
    transparent 100%
  );
}

.fc-node--external .fc-node__label {
  color: rgba(90, 230, 200, 0.82);
}

/* External checkpoint - mint styling for cross-boundary receipt */
.fc-checkpoint--external {
  border-left-color: rgba(90, 230, 200, 0.32);
}

.fc-checkpoint--external .fc-checkpoint__label {
  color: rgba(90, 230, 200, 0.64);
}

.fc-checkpoint--external .fc-checkpoint__value {
  color: rgba(231, 236, 239, 0.82);
}

/* Hash display within flow text */
.fc-hash {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  color: rgba(231, 236, 239, 0.64);
  margin-top: var(--space-1);
}

/* Fork - two parallel chains after handoff */
.fc-fork {
  display: flex;
  gap: var(--space-6);
  margin-left: var(--mechanism-offset);
  position: relative;
}

.fc-fork__trunk {
  flex: 1;
  max-width: 20rem;
}

.fc-fork__trunk .fc-node {
  margin: 0;
  padding-left: calc(var(--space-4) - 2px);
  border-left: 2px solid rgba(255, 255, 255, 0.16);
}

.fc-fork__trunk .fc-node::before {
  content: none;
}

.fc-fork__branch {
  flex: 1;
  max-width: 20rem;
  position: relative;
  padding-left: var(--space-5);
}

.fc-fork__line {
  position: absolute;
  top: var(--space-5);
  left: calc(-1 * var(--space-4));
  width: calc(var(--space-4) + var(--space-5));
  height: 2px;
  background: linear-gradient(
    90deg,
    rgba(90, 230, 200, 0.32),
    rgba(90, 230, 200, 0.16)
  );
}

.fc-fork__line::before {
  content: "";
  position: absolute;
  left: 0;
  top: calc(-1 * var(--space-5));
  width: 2px;
  height: var(--space-5);
  background: rgba(90, 230, 200, 0.24);
}

.fc-fork__stack {
  border-left: 2px solid rgba(90, 230, 200, 0.24);
}

.fc-fork__stack .fc-node {
  margin: 0;
  padding-left: calc(var(--space-4) - 2px);
  border-left: none;
  background: linear-gradient(
    90deg,
    rgba(90, 230, 200, 0.04),
    rgba(90, 230, 200, 0) 78%
  );
}

.fc-fork__stack .fc-node::before {
  content: none;
}

.fc-fork__stack .fc-node__label {
  color: rgba(90, 230, 200, 0.72);
}

.fc-fork__stack .fc-connector {
  height: var(--space-3);
}

.fc-fork__trunk .fc-connector {
  height: var(--space-3);
}

@media (max-width: 520px) {
  .fc-stack {
    max-width: 100%;
    padding-left: var(--space-5);
  }

  .fc-stack::before {
    left: var(--space-5);
  }

  .fc-node {
    padding: var(--space-4) var(--space-4);
  }

  .fc-checkpoint {
    margin-left: var(--space-4);
  }

  .fc-checkpoint::before {
    left: calc(-1 * var(--space-4));
    width: var(--space-4);
  }

  .fc-node__flow {
    white-space: normal;
    overflow: visible;
    text-overflow: clip;
    overflow-wrap: anywhere;
  }

  .fc-fork {
    flex-direction: column;
    gap: var(--space-4);
    margin-left: 0;
  }

  .fc-fork__trunk,
  .fc-fork__branch {
    max-width: 100%;
  }

  .fc-fork__branch {
    padding-left: var(--space-4);
    margin-top: var(--space-2);
  }

  .fc-fork__line {
    display: none;
  }

  .fc-fork__stack {
    border-left: 2px solid rgba(90, 230, 200, 0.24);
  }

  .story-ledger-row {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .story-ledger {
    --story-ledger-offset: var(--space-4);
  }

  .story-ledger-story {
    margin-right: 0;
    text-align: left;
    border-right: none;
    border-left: 2px solid rgba(171, 69, 192, 0.5);
    padding-left: calc(var(--space-4) - 2px);
    padding-right: var(--space-4);
  }

  .story-ledger-story::before {
    content: none;
  }

  .story-ledger-story-copy {
    margin-left: 0;
    max-width: none;
  }

  .story-ledger-ledger {
    padding-left: 0;
  }

  .story-ledger-ledger::before {
    left: 0;
    top: calc(-1 * var(--space-3));
    bottom: calc(-1 * var(--space-3));
  }

  .story-ledger-row:first-child .story-ledger-ledger::before {
    top: var(--space-3);
  }

  .story-ledger-row--last .story-ledger-ledger::before {
    bottom: var(--space-3);
  }

  .eco-context-inline {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
}

.flow.terminal {
  border: none;
  background: transparent;
  border-radius: 0;
  padding: var(--space-5);
  color: var(--text);
  line-height: 1.6;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
  overflow-x: hidden;
  font-variant-ligatures: none;
}

.flow.terminal.terminal-subtle {
  color: var(--muted);
}

.terminal-panel {
  border: none;
  background: transparent;
  border-radius: 0;
  overflow: visible;
}

.terminal-panel .flow.terminal {
  border: none;
  background: linear-gradient(
    90deg,
    rgba(15, 18, 22, 0.22),
    rgba(15, 18, 22, 0) 78%
  );
  border-radius: 0;
  margin: 0;
  padding-left: calc(var(--space-5) - 2px);
  border-left: 2px solid rgba(255, 255, 255, 0.08);
}

.terminal-panel .flow.terminal + .flow.terminal {
  border-top: 1px solid var(--line-soft);
}

.terminal-panel .terminal-meta {
  margin-top: 0;
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--line-soft);
  background: linear-gradient(
    90deg,
    rgba(15, 18, 22, 0.18),
    rgba(15, 18, 22, 0) 78%
  );
  padding-left: calc(var(--space-5) - 2px);
  border-left: 2px solid rgba(255, 255, 255, 0.08);
}

.terminal-panel .terminal-meta-row {
  padding: 0;
}

.terminal-panel .terminal-meta-label,
.terminal-panel .terminal-meta-value {
  font-size: var(--step--1);
}

.terminal-panel--tight .flow.terminal {
  padding: var(--space-4);
  line-height: 1.5;
  color: rgba(231, 236, 239, 0.88);
}

.terminal-panel--tight .flow.terminal.terminal-subtle {
  color: rgba(168, 176, 185, 0.95);
}

.terminal-panel--tight .terminal-meta {
  padding: var(--space-3) var(--space-4);
}

.terminal-meta {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--line-soft);
}

.terminal-meta-row {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  column-gap: var(--space-4);
  row-gap: var(--space-2);
  align-items: baseline;
}

.terminal-meta-label {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.terminal-meta-value {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  color: rgba(231, 236, 239, 0.82);
  letter-spacing: 0.02em;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

.terminal-meta-link {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  color: var(--accent);
  text-decoration: none;
}

.terminal-meta-link:hover {
  text-decoration: underline;
}

.inline-link {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(90, 230, 200, 0.45);
  padding-bottom: 1px;
}

.inline-link:hover {
  border-bottom-color: rgba(90, 230, 200, 0.85);
}

.inline-link:focus-visible {
  outline: 2px solid rgba(90, 230, 200, 0.65);
  outline-offset: 3px;
  border-bottom-color: transparent;
}

.feature-list {
  list-style: none;
  margin-top: var(--space-3);
  color: var(--muted);
  display: grid;
  gap: var(--space-2);
  font-size: var(--step-0);
  max-width: var(--measure);
}

.feature-list li::before {
  content: "- ";
  color: var(--accent);
}

.layer-note {
  margin-top: var(--space-4);
  color: var(--muted);
  font-size: var(--step--1);
}

.section-head .layer-note {
  margin-top: var(--space-3);
}

.footer {
  margin-top: var(--space-11);
  color: var(--muted);
  font-size: var(--step--1);
  border-top: 1px solid var(--line);
  padding: var(--space-10) 0 var(--space-12);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: clamp(var(--space-10), 6vw, var(--space-14));
  align-items: start;
}

.footer-brand {
  display: grid;
  gap: var(--space-3);
  max-width: var(--measure);
}

.footer-name {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: 0.01em;
  color: rgba(231, 236, 239, 0.86);
  display: inline-flex;
  align-items: baseline;
  gap: 0.05em;
}

.footer-mark {
  color: rgba(231, 236, 239, 0.9);
  line-height: 1;
}

.footer-mark .brand-mark {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: var(--step-3);
}

.footer-mark .brand-dot {
  color: var(--accent);
  margin-left: var(--space-1);
}

.footer-tagline {
  color: rgba(231, 236, 239, 0.9);
  font-size: var(--step-0);
  letter-spacing: 0.01em;
  font-weight: 650;
}

.footer-fine {
  color: var(--muted);
  font-size: var(--step--1);
}

.footer-col {
  display: grid;
  gap: var(--space-3);
  align-content: start;
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(231, 236, 239, 0.68);
  margin-bottom: var(--space-1);
}

.footer-link {
  color: rgba(231, 236, 239, 0.72);
  text-decoration: none;
  line-height: 1.4;
}

.footer-link:hover {
  color: rgba(231, 236, 239, 0.92);
  text-decoration: underline;
  text-decoration-color: rgba(90, 230, 200, 0.6);
  text-underline-offset: 3px;
}

.footer-link:focus-visible {
  outline: 2px solid rgba(90, 230, 200, 0.65);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.ra-input {
  width: 100%;
  min-height: var(--min-target);
  background: linear-gradient(
    90deg,
    rgba(15, 18, 22, 0.22),
    rgba(15, 18, 22, 0) 78%
  );
  border: none;
  border-radius: 0;
  border-left: 2px solid rgba(255, 255, 255, 0.14);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding: var(--space-4);
  padding-left: calc(var(--space-4) - 2px);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--step-0);
}

.rail-form {
  display: grid;
  gap: var(--space-6);
}

.rail-form .rail-item {
  display: grid;
  gap: var(--space-2);
}

.rail-form .rail-meta {
  margin: 0;
}

.ra-textarea {
  min-height: 120px;
  resize: vertical;
  line-height: 1.4;
}

.ra-input::placeholder {
  color: var(--muted);
}

.ra-input:focus-visible {
  outline: 2px solid rgba(90, 230, 200, 0.55);
  outline-offset: 2px;
  border-left-color: rgba(90, 230, 200, 0.42);
}

.ra-status {
  color: rgba(231, 236, 239, 0.72);
  font-size: var(--step--1);
  margin-left: var(--space-3);
  align-self: center;
}

.rail-form .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-6);
  align-items: center;
}

.rail-form .btn {
  flex-shrink: 0;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: var(--space-6);
  margin-top: var(--space-7);
  padding-top: var(--space-5);
  border-top: 1px solid var(--line-soft);
  flex-wrap: wrap;
}

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 720px) {
  .nav {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero {
    padding-top: var(--space-11);
  }

  .hero:not(.hero--primary) .hero-title {
    font-size: var(--step-3);
    max-width: 100%;
  }

  .hero--primary .hero-title {
    font-size: var(--step-4);
  }

}

/* CTA sections: stack content vertically with buttons below text, left-aligned */
.section-split[data-type="cta"] {
  grid-template-columns: 1fr;
}

.section-split[data-type="cta"] .section-body {
  justify-self: start;
}

.section-split[data-type="cta"] .hero-actions {
  justify-content: flex-start;
}

@media (max-width: 900px) {
  .section-split {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}


.preview-cta-wrap {
  display: block;
}

/* Research preview should mirror demo CTA behavior: row-first, stack only on small mobile. */
.section.ghost-panel.install-strip .hero-actions {
  flex-wrap: nowrap;
}

@media (max-width: 430px) {
  .section.ghost-panel.install-strip .hero-actions {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }
}