/* ==========================================================================
   Gradien How it works — the underlying engine (new-positioning branch)
   ========================================================================== */

.how-hero {
  position: relative;
  padding-block: clamp(56px, 8vw, 96px);
  background-size: cover;
  background-position: center;
  overflow: hidden;
}
.how-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, rgba(8,8,10,0.94) 0%, rgba(8,8,10,0.86) 32%, rgba(8,8,10,0.6) 62%, rgba(8,8,10,0.32) 100%);
}
.how-hero__grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--space-6); align-items: center; }
.how-hero__copy { color: var(--white); }
.how-hero__copy .gr-eyebrow { color: var(--text-inverse-tertiary); }
.how-hero__copy .home-hero__trial { color: var(--text-inverse-tertiary); }
.how-hero__title { font-size: var(--text-h1); font-weight: var(--weight-medium); line-height: var(--leading-tight); letter-spacing: var(--tracking-display); margin: var(--space-2) 0 var(--space-3); color: var(--white); }
.how-hero__lead { font-size: var(--text-lead); color: var(--text-inverse-secondary); max-width: 52ch; margin: 0 0 var(--space-4); }
.how-hero__visual { min-width: 0; }

/* ---------- Vertical engine diagram ---------- */
.how-engine {
  max-width: 420px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  background: var(--surface-page);
  border-radius: var(--radius-2xl);
  padding: var(--space-5);
  box-shadow: var(--shadow-lg);
}
.how-engine__layer { width: 100%; text-align: center; }
.how-engine__layer-label { display: block; font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: var(--tracking-caps); text-transform: uppercase; color: var(--text-tertiary); margin-bottom: var(--space-2); }
.how-engine__row { list-style: none; display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-2) var(--space-3); margin: 0; padding: 0; }
.how-engine__row li { display: flex; align-items: center; gap: 6px; font-size: var(--text-sm); color: var(--text-secondary); }
.how-engine__connector { position: relative; width: 2px; height: 44px; margin: var(--space-2) 0; background: var(--border-subtle); flex: none; }
.how-engine__pulse {
  position: absolute;
  left: 50%;
  top: -6px;
  width: 6px;
  height: 6px;
  margin-left: -3px;
  border-radius: 50%;
  background: var(--signal-blue);
  box-shadow: 0 0 8px 2px color-mix(in srgb, var(--signal-blue) 55%, transparent);
  opacity: 0;
  animation: how-engine-flow 4.4s linear infinite;
}
.how-engine__connector .how-engine__pulse:nth-child(2) { animation-delay: 2.2s; }
@keyframes how-engine-flow {
  0% { top: -6px; opacity: 0; }
  12% { opacity: 1; }
  88% { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}
.how-engine__stack { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; max-width: 380px; margin-inline: auto; }
.how-engine__stack li { background: var(--surface-card); border-radius: var(--radius-sm); padding: 10px 14px; font-size: var(--text-sm); color: var(--ink); }
.how-engine__output { max-width: 340px; margin: var(--space-2) auto 0; }
.how-engine__return { margin-top: var(--space-3); font-size: var(--text-sm); color: var(--signal-blue-ink); border-top: 1px dashed var(--border-strong); padding-top: var(--space-2); max-width: 420px; text-align: center; }

@media (prefers-reduced-motion: reduce) {
  .how-engine__pulse { animation: none; opacity: 0.6; top: 40%; }
}

/* ---------- The complete loop ---------- */
.how-loop__body { position: relative; }
.how-loop__steps {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  max-width: none;
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: var(--space-3);
}
.how-loop__steps li {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: var(--space-3);
  opacity: 0.35;
  transition: opacity 800ms var(--ease-out), transform var(--duration-fast) var(--ease-out);
}
.how-loop__steps li::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--border-subtle);
  transition: background 800ms var(--ease-out);
}
.how-loop__steps li.is-on, .how-loop__steps li.is-now { opacity: 1; }
.how-loop__steps li.is-on::before, .how-loop__steps li.is-now::before { background: var(--signal-blue); }
.how-loop__num { font-family: var(--font-mono); color: var(--signal-blue-ink); }
.how-loop__steps strong { display: block; font-size: var(--text-body-lg); }
.how-loop__steps p { margin: 0; color: var(--text-secondary); font-size: var(--text-sm); }

/* ---------- Activity to structured context ---------- */
.how-context__visual { max-width: 620px; margin: var(--space-6) auto 0; display: flex; flex-direction: column; align-items: center; gap: var(--space-2); }
.how-context__email, .how-context__update { width: 100%; }
.how-context__arrow { font-size: var(--text-sm); color: var(--text-tertiary); font-family: var(--font-mono); }
.how-context__extracted { list-style: none; display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-2); margin: 0; padding: 0; }
.how-context__note { text-align: center; max-width: 60ch; margin: var(--space-4) auto 0; color: var(--text-secondary); font-size: var(--text-sm); }

/* ---------- Living knowledge graph ---------- */
.how-graph__visual { position: relative; max-width: 560px; aspect-ratio: 1; margin: var(--space-6) auto 0; }
.how-graph__lines { position: absolute; inset: 0; width: 100%; height: 100%; }
.how-graph__lines line { stroke: var(--border-strong); stroke-width: 0.4; }
/* Lines stay invisible (fully "undrawn") until the section scrolls into
   view, then the kit-reveal observer adds .is-in and each line draws from
   center to its cluster. pathLength="1" (set in markup) normalizes every
   line's length to 1 regardless of its actual geometry, so one dasharray/
   offset pair works for all eight spokes without measuring each one.
   Scoped to html.js (see kit-reveal convention below) so no-JS visitors
   simply see the graph fully connected — never a permanently blank one. */
html.js .how-graph__lines line {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  transition: stroke-dashoffset 1800ms var(--ease-out);
}
html.js .how-graph__visual.is-in .how-graph__lines line { stroke-dashoffset: 0; }
html.js .how-graph__visual.is-in .how-graph__lines line:nth-child(2) { transition-delay: 120ms; }
html.js .how-graph__visual.is-in .how-graph__lines line:nth-child(3) { transition-delay: 240ms; }
html.js .how-graph__visual.is-in .how-graph__lines line:nth-child(4) { transition-delay: 360ms; }
html.js .how-graph__visual.is-in .how-graph__lines line:nth-child(5) { transition-delay: 480ms; }
html.js .how-graph__visual.is-in .how-graph__lines line:nth-child(6) { transition-delay: 600ms; }
html.js .how-graph__visual.is-in .how-graph__lines line:nth-child(7) { transition-delay: 720ms; }
html.js .how-graph__visual.is-in .how-graph__lines line:nth-child(8) { transition-delay: 840ms; }
.how-graph__center { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); background: var(--ink); color: var(--white); border-radius: var(--radius-lg); padding: 14px 20px; font-size: var(--text-sm); font-weight: var(--weight-medium); z-index: 2; white-space: nowrap; }
.how-graph__clusters { list-style: none; margin: 0; padding: 0; }
.how-graph__clusters li {
  position: absolute;
  max-width: 108px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 8px 10px;
  text-align: center;
  font-size: var(--text-xs);
  line-height: var(--leading-snug);
  color: var(--text-secondary);
  background: var(--surface-page);
  z-index: 1;
  animation: how-graph-float 10s ease-in-out infinite;
}
.how-graph__clusters li:nth-child(1) { top: 12%;    left: 50%;    animation-duration: 9.2s;  animation-delay: -0.4s; }
.how-graph__clusters li:nth-child(2) { top: 23.13%; left: 76.87%; animation-duration: 10.8s; animation-delay: -3.2s; }
.how-graph__clusters li:nth-child(3) { top: 50%;    left: 88%;    animation-duration: 9.8s;  animation-delay: -6s; }
.how-graph__clusters li:nth-child(4) { top: 76.87%; left: 76.87%; animation-duration: 11.4s; animation-delay: -1.6s; }
.how-graph__clusters li:nth-child(5) { top: 88%;    left: 50%;    animation-duration: 8.8s;  animation-delay: -4.6s; }
.how-graph__clusters li:nth-child(6) { top: 76.87%; left: 23.13%; animation-duration: 10.4s; animation-delay: -8s; }
.how-graph__clusters li:nth-child(7) { top: 50%;    left: 12%;    animation-duration: 9.6s;  animation-delay: -2.2s; }
.how-graph__clusters li:nth-child(8) { top: 23.13%; left: 23.13%; animation-duration: 11s;   animation-delay: -6.8s; }
@keyframes how-graph-float {
  0%, 100% { transform: translate(-50%, -50%) translateY(0); }
  50% { transform: translate(-50%, -50%) translateY(-7px); }
}
.how-graph__note { text-align: center; max-width: 60ch; margin: var(--space-4) auto 0; color: var(--text-secondary); font-size: var(--text-sm); }

@media (prefers-reduced-motion: reduce) {
  .how-graph__lines line { transition: none; stroke-dashoffset: 0; }
  .how-graph__clusters li { animation: none; }
}

/* ---------- Workpaths ---------- */
.how-workpath__timeline { margin-top: var(--space-6); display: flex; flex-direction: column; align-items: center; }
.how-workpath__timeline > .gr-eyebrow { align-self: center; margin-bottom: var(--space-3); }
.how-workpath__steps { list-style: none; margin: 0; padding: 4px 0 0; width: 100%; display: flex; gap: var(--space-2); position: relative; }
.how-workpath__steps::before {
  content: '';
  position: absolute;
  top: 8px; left: 0; right: 0;
  height: 2px;
  background: var(--signal-blue);
  transform-origin: left center;
  transform: scaleX(0);
  transition: transform 2200ms var(--ease-out);
}
html.js .how-workpath__timeline.is-in .how-workpath__steps::before { transform: scaleX(1); }
.how-workpath__steps li { flex: 1; min-width: 0; display: flex; flex-direction: column; align-items: center; gap: 8px; text-align: center; }
.how-workpath__dot {
  width: 9px; height: 9px; border-radius: 50%; background: var(--signal-blue); flex: none;
  opacity: 0; transform: scale(0.3);
  transition: opacity 520ms var(--ease-out), transform 520ms var(--ease-out);
}
html.js .how-workpath__timeline.is-in .how-workpath__dot { opacity: 1; transform: scale(1); }
.how-workpath__steps li:nth-child(1) .how-workpath__dot { transition-delay: 120ms; }
.how-workpath__steps li:nth-child(2) .how-workpath__dot { transition-delay: 380ms; }
.how-workpath__steps li:nth-child(3) .how-workpath__dot { transition-delay: 640ms; }
.how-workpath__steps li:nth-child(4) .how-workpath__dot { transition-delay: 900ms; }
.how-workpath__steps li:nth-child(5) .how-workpath__dot { transition-delay: 1160ms; }
.how-workpath__steps li:nth-child(6) .how-workpath__dot { transition-delay: 1420ms; }
.how-workpath__steps li:nth-child(7) .how-workpath__dot { transition-delay: 1680ms; }
.how-workpath__steps li:nth-child(8) .how-workpath__dot { transition-delay: 1940ms; }
.how-workpath__label { font-size: var(--text-xs); color: var(--text-secondary); line-height: var(--leading-snug); max-width: 12ch; transition: color var(--duration-fast) var(--ease-out); }

.how-workpath__flow {
  width: 2px; height: 30px; flex: none;
  background: linear-gradient(180deg, var(--signal-blue), transparent);
  opacity: 0;
  transition: opacity 800ms var(--ease-out);
}
html.js .how-workpath__timeline.is-in .how-workpath__flow { opacity: 1; transition-delay: 2300ms; }

.how-workpath__output {
  display: flex; flex-direction: column; align-items: center; gap: var(--space-2);
  width: 100%; max-width: 360px;
  opacity: 0; transform: translateY(10px);
  transition: opacity 1000ms var(--ease-out), transform 1000ms var(--ease-out);
}
html.js .how-workpath__timeline.is-in .how-workpath__output { opacity: 1; transform: none; transition-delay: 2700ms; }
.how-workpath__saved { display: inline-flex; align-items: center; gap: 6px; font-size: var(--text-xs); color: var(--text-tertiary); }
.how-workpath__saved img { opacity: 0.75; }

.how-workpath__statement { text-align: center; font-size: var(--text-h3); font-weight: var(--weight-medium); margin-top: var(--space-6); max-width: 40ch; margin-inline: auto; }

@media (prefers-reduced-motion: reduce) {
  .how-workpath__steps::before,
  .how-workpath__dot,
  .how-workpath__flow,
  .how-workpath__output {
    transition: none !important;
    transform: none !important;
    opacity: 1 !important;
  }
}

@media (prefers-reduced-motion: reduce) {
  .how-prepare__lines line { transition: none; stroke-dashoffset: 0; }
}

/* ---------- Task preparation ---------- */
.how-prepare__cloud { position: relative; height: 340px; margin-top: var(--space-6); }
.how-prepare__lines { position: absolute; inset: 0; width: 100%; height: 100%; }
.how-prepare__lines line { stroke: var(--signal-blue); stroke-width: 0.35; }
html.js .how-prepare__lines line {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  transition: stroke-dashoffset 1400ms var(--ease-out);
}
html.js .how-prepare__cloud.is-in .how-prepare__lines line { stroke-dashoffset: 0; }
html.js .how-prepare__cloud.is-in .how-prepare__lines line:nth-child(2) { transition-delay: 180ms; }
html.js .how-prepare__cloud.is-in .how-prepare__lines line:nth-child(3) { transition-delay: 360ms; }
html.js .how-prepare__cloud.is-in .how-prepare__lines line:nth-child(4) { transition-delay: 540ms; }
html.js .how-prepare__cloud.is-in .how-prepare__lines line:nth-child(5) { transition-delay: 720ms; }
html.js .how-prepare__cloud.is-in .how-prepare__lines line:nth-child(6) { transition-delay: 900ms; }
html.js .how-prepare__cloud.is-in .how-prepare__lines line:nth-child(7) { transition-delay: 1080ms; }
.how-prepare__task {
  position: absolute; top: 50%; left: 82%; transform: translate(-50%, -50%);
  display: flex; align-items: center; gap: 8px;
  background: var(--ink); color: var(--white);
  padding: 10px 16px; border-radius: var(--radius-lg);
  font-size: var(--text-sm); font-weight: var(--weight-medium);
  max-width: 160px; text-align: center; z-index: 2;
}
.how-prepare__task img { flex: none; opacity: 0.85; }
.how-prepare__items { list-style: none; margin: 0; padding: 0; }
.how-prepare__items li {
  position: absolute;
  transform: translate(-50%, -50%);
  white-space: nowrap;
  padding: 7px 12px;
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  background: var(--surface-page);
  z-index: 1;
}
.how-prepare__items li.is-linked { border: 1px solid var(--signal-blue); color: var(--text-primary); }
.how-prepare__items li.is-unlinked { border: 1px dashed var(--border-subtle); color: var(--text-tertiary); opacity: 0.6; }
.how-prepare__lists { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); max-width: 680px; margin: var(--space-6) auto 0; }
.how-prepare__lists strong { display: block; margin-bottom: var(--space-2); }
.how-prepare__lists ul { margin: 0; padding-left: 1.1em; color: var(--text-secondary); font-size: var(--text-sm); display: flex; flex-direction: column; gap: 4px; }
.how-prepare__statement { text-align: center; font-size: var(--text-h3); font-weight: var(--weight-medium); margin-top: var(--space-6); max-width: 40ch; margin-inline: auto; }

/* ---------- Compounding ---------- */
.how-compound__stages { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); margin-top: var(--space-6); }
.how-compound__stage { display: flex; flex-direction: column; gap: var(--space-2); }
.how-compound__meter { height: 6px; border-radius: var(--radius-pill); background: var(--border-subtle); overflow: hidden; }
.how-compound__meter span { display: block; height: 100%; background: var(--signal-blue); border-radius: var(--radius-pill); }
.how-compound__stages ul { margin: var(--space-1) 0 0; padding-left: 1.1em; color: var(--text-secondary); font-size: var(--text-sm); display: flex; flex-direction: column; gap: 4px; }
.how-compound__note { text-align: center; max-width: 64ch; margin: var(--space-5) auto 0; color: var(--text-secondary); font-size: var(--text-sm); }

/* ---------- Control ---------- */
.how-control__panel { max-width: 560px; margin: var(--space-6) auto 0; }
.how-control__outcome {
  display: flex; flex-direction: column; gap: 6px; align-items: flex-start;
  background: var(--ink); color: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}
.how-control__outcome .gr-eyebrow { color: var(--text-inverse-tertiary); }
.how-control__outcome-value { font-size: var(--text-h3); font-weight: var(--weight-medium); margin: 0; }
.how-control__outcome .gr-status { color: var(--text-inverse-secondary); }
.how-control__trail { list-style: none; margin: var(--space-4) 0 0; padding: 0; display: flex; flex-direction: column; gap: var(--space-3); }
.how-control__trail li {
  position: relative;
  padding: var(--space-3) var(--space-3) var(--space-3) calc(var(--space-3) + 14px);
  border-left: 2px solid var(--border-subtle);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 1000ms var(--ease-out), transform 1000ms var(--ease-out), background var(--duration-fast) var(--ease-out);
  border-radius: var(--radius-sm);
}
html.js .how-control__panel.is-in .how-control__trail li { opacity: 1; transform: none; }
html.js .how-control__panel.is-in .how-control__trail li:nth-child(1) { transition-delay: 300ms; }
html.js .how-control__panel.is-in .how-control__trail li:nth-child(2) { transition-delay: 800ms; }
html.js .how-control__panel.is-in .how-control__trail li:nth-child(3) { transition-delay: 1300ms; }
html.js .how-control__panel.is-in .how-control__trail li:nth-child(4) { transition-delay: 1800ms; }
.how-control__trail li::before {
  content: '';
  position: absolute;
  left: -5px; top: var(--space-3);
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--signal-blue);
}
.how-control__trail .gr-ts { display: block; font-size: var(--text-xs); color: var(--text-tertiary); margin-bottom: 4px; }
.how-control__trail p { margin: 0; color: var(--text-secondary); font-size: var(--text-sm); }
.how-control__trail .gr-badge { margin-top: var(--space-2); }
.how-control__statement { text-align: center; font-size: var(--text-h3); font-weight: var(--weight-medium); margin-top: var(--space-6); max-width: 40ch; margin-inline: auto; }

@media (prefers-reduced-motion: reduce) {
  .how-control__trail li { transition: none !important; opacity: 1 !important; transform: none !important; }
}

/* ---------- Hover interactions (subtle, per-section) ---------- */
.how-engine { transition: transform var(--duration-base) var(--ease-out), box-shadow var(--duration-base) var(--ease-out); }
.how-engine:hover { transform: translateY(-3px); box-shadow: 0 26px 64px rgba(5,5,5,0.16); }

.how-loop__steps li { cursor: default; }
.how-loop__steps li:hover { transform: translateY(-3px); }
.how-loop__steps li:hover::before { background: var(--signal-blue); }

.how-context__email, .how-context__update { transition: transform var(--duration-base) var(--ease-out), box-shadow var(--duration-base) var(--ease-out); }
.how-context__email:hover, .how-context__update:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.how-context__extracted li { transition: transform var(--duration-fast) var(--ease-out); }
.how-context__extracted li:hover { transform: translateY(-2px); }

.how-graph__clusters li { transition: transform var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out); }
.how-graph__clusters li:hover { animation-play-state: paused; border-color: var(--signal-blue); color: var(--text-primary); z-index: 3; }
.how-graph__center { transition: transform var(--duration-fast) var(--ease-out); }
.how-graph__center:hover { transform: translate(-50%, -50%) scale(1.05); }

.how-workpath__steps li { transition: transform var(--duration-fast) var(--ease-out); }
.how-workpath__steps li:hover { transform: translateY(-2px); }
.how-workpath__steps li:hover .how-workpath__dot { transform: scale(1.4); }
.how-workpath__steps li:hover .how-workpath__label { color: var(--text-primary); }
.how-workpath__window { transition: transform var(--duration-base) var(--ease-out), box-shadow var(--duration-base) var(--ease-out); }
.how-workpath__output:hover .how-workpath__window { transform: translateY(-3px); box-shadow: var(--shadow-md); }

.how-prepare__items li { transition: transform var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast) var(--ease-out), opacity var(--duration-fast) var(--ease-out); }
.how-prepare__items li.is-linked:hover { transform: translate(-50%, -50%) scale(1.06); box-shadow: var(--shadow-sm); z-index: 3; }
.how-prepare__items li.is-unlinked:hover { opacity: 0.85; }
.how-prepare__task { transition: transform var(--duration-fast) var(--ease-out); }
.how-prepare__task:hover { transform: translate(-50%, -50%) scale(1.04); }

.how-compound__stage { transition: transform var(--duration-base) var(--ease-out); }
.how-compound__stage:hover { transform: translateY(-3px); }

.how-control__outcome { transition: transform var(--duration-base) var(--ease-out), box-shadow var(--duration-base) var(--ease-out); }
.how-control__outcome:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.how-control__trail li:hover { background: var(--surface-card); }

@media (max-width: 900px) {
  .how-hero__grid { grid-template-columns: 1fr; }
  .how-hero__visual { margin-top: var(--space-5); }
  .how-loop__steps { grid-template-columns: repeat(4, 1fr); gap: var(--space-4) var(--space-3); }
  .how-prepare__lists { grid-template-columns: 1fr; }
  .how-compound__stages { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .how-graph__visual { aspect-ratio: auto; max-width: 480px; display: flex; flex-direction: column; align-items: center; }
  .how-graph__lines { display: none; }
  .how-graph__center { position: static; transform: none; margin-bottom: var(--space-3); }
  .how-graph__clusters { position: static; width: 100%; display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-2); }
  .how-graph__clusters li { position: static; transform: none; max-width: none; animation: none; }

  .how-workpath__steps { flex-wrap: wrap; row-gap: var(--space-4); }
  .how-workpath__steps::before { display: none; }
  .how-workpath__steps li { flex: 1 1 40%; }
  .how-workpath__flow { display: none; }

  .how-prepare__cloud { height: auto; display: flex; flex-direction: column; align-items: center; gap: var(--space-3); }
  .how-prepare__lines { display: none; }
  .how-prepare__task { position: static; transform: none; }
  .how-prepare__items { position: static; width: 100%; display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
  .how-prepare__items li { position: static; transform: none; }
}

@media (max-width: 560px) {
  .how-loop__steps { grid-template-columns: repeat(2, 1fr); }
}