/* ==========================================================================
   Curizen · Token Management walkthrough
   ========================================================================== */

.wt { background: var(--bg-subtle); min-height: 100vh; display: flex; flex-direction: column; }
.wt main { flex: 1; display: flex; flex-direction: column; }
.wt kbd {
  display: inline-block;
  min-width: 22px;
  padding: 0 6px;
  border-radius: 5px;
  background: #fff;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  color: var(--text);
  font-size: 0.75rem;
  line-height: 1.6;
  text-align: center;
}
.wt code:not(.code) {
  padding: 1px 6px;
  border-radius: 5px;
  background: var(--bg-muted);
  color: var(--text);
  font-size: 0.84em;
  overflow-wrap: anywhere;
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.wt-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.wt-header__inner {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  max-width: calc(var(--content-max) + var(--gutter) * 2);
  height: 64px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.wt-header__brand { display: inline-flex; flex: none; border-radius: var(--radius-sm); }
.wt-header__brand img { width: 104px; height: auto; aspect-ratio: 3 / 1; }
.wt-header__divider { width: 1px; height: 22px; background: var(--line-strong); }
.wt-header__title { font-size: 0.9375rem; font-weight: 700; letter-spacing: -0.01em; white-space: nowrap; }
.wt-header__badge { margin-left: var(--sp-2); }
.wt-header__lang { margin-left: auto; }
.wt-header__back { flex: none; }

/* --------------------------------------------------------------------------
   Intro
   -------------------------------------------------------------------------- */
.wt-intro {
  flex: 1;
  display: flex;
  align-items: center;
  padding-block: clamp(3rem, 2rem + 5vw, 6rem);
  background:
    radial-gradient(55% 60% at 90% 10%, rgba(34, 184, 230, 0.1), transparent 70%),
    linear-gradient(180deg, #fff 0%, var(--bg-subtle) 100%);
}
.wt-intro[hidden] { display: none; }
.wt-intro__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(2.5rem, 1rem + 5vw, 5.5rem);
  align-items: center;
  width: 100%;
  max-width: calc(var(--content-max) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.wt-intro__title { margin-top: var(--sp-5); font-size: clamp(2rem, 1.4rem + 2.4vw, 3.25rem); max-width: 18ch; }
.wt-intro__copy .lead { margin-top: var(--sp-6); max-width: 36rem; }
.wt-intro__actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--sp-5); margin-top: var(--sp-8); }
.wt-intro__note { margin-top: var(--sp-10); max-width: 38rem; background: #fff; }

.wt-intro__steps {
  display: grid;
  padding: var(--sp-2);
  border-radius: var(--radius-xl);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-2);
}
.wt-intro__steps li {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  column-gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  border-bottom: 1px solid var(--line);
}
.wt-intro__steps li:last-child { border-bottom: 0; }
.wt-intro__steps .num { grid-row: 1 / span 2; font-size: var(--fs-xs); font-weight: 700; color: var(--cz-cyan-700); padding-top: 2px; }
.wt-intro__steps b { font-size: 0.9375rem; font-weight: 650; }
.wt-intro__steps span:last-child { font-size: var(--fs-xs); color: var(--text-3); }

/* --------------------------------------------------------------------------
   Tour frame
   -------------------------------------------------------------------------- */
.wt-tour { flex: 1; display: flex; flex-direction: column; }
.wt-tour[hidden] { display: none; }

.progress {
  width: 100%;
  max-width: calc(var(--content-max) + var(--gutter) * 2);
  margin-inline: auto;
  padding: var(--sp-6) var(--gutter) 0;
}
.progress__list { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: var(--sp-2); }
.progress__btn {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  width: 100%;
  min-height: 44px;
  padding: var(--sp-1) var(--sp-2);
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-3);
  font-size: var(--fs-xs);
  font-weight: 650;
  text-align: left;
  cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.progress__btn:hover { background: #fff; color: var(--text); }
.progress__n {
  display: grid;
  place-items: center;
  flex: none;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--line-strong);
  font-size: 0.75rem;
  font-weight: 700;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.progress__l { min-width: 0; line-height: 1.25; }
.progress__btn { min-width: 0; }

/* German compounds are long: allow proper hyphenation in narrow labels (never in headings). */
html:lang(de) .progress__l,
html:lang(de) .pipe__l,
html:lang(de) .arch__node,
html:lang(de) .arch__record-grid dd,
html:lang(de) .lane__facts dd,
html:lang(de) .value__flow li,
html:lang(de) .value__grid dd,
html:lang(de) .join-map__src b,
html:lang(de) .calc__line > span:first-child {
  -webkit-hyphens: auto;
  hyphens: auto;
}
.arch__record-grid dd:not(.mono) { overflow-wrap: normal; }
.progress__btn.is-done { color: var(--cz-slate-700); }
.progress__btn.is-done .progress__n { background: var(--cz-navy-950); border-color: var(--cz-navy-950); color: #fff; }
.progress__btn[aria-current="step"] { color: var(--text); }
.progress__btn[aria-current="step"] .progress__n {
  background: var(--cz-blue-600);
  border-color: var(--cz-blue-600);
  color: #fff;
  box-shadow: 0 0 0 4px rgba(41, 98, 255, 0.16);
}
.progress__bar { height: 3px; margin-top: var(--sp-3); border-radius: 3px; background: var(--line); overflow: hidden; }
.progress__bar i {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--cz-blue-600), var(--cz-cyan-500));
  transition: width var(--dur-slow) var(--ease);
}

.stage {
  flex: 1;
  width: 100%;
  max-width: calc(var(--content-max) + var(--gutter) * 2);
  margin-inline: auto;
  padding: var(--sp-6) var(--gutter) var(--sp-8);
}

.step {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(1.5rem, 0.5rem + 3.5vw, 3.5rem);
  align-items: start;
  padding: clamp(1.5rem, 1rem + 2vw, 2.75rem);
  border-radius: var(--radius-xl);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-2);
  animation: step-in var(--dur-slow) var(--ease) both;
}
.step[hidden] { display: none; }
@keyframes step-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

.step__copy { display: flex; flex-direction: column; gap: var(--sp-5); min-width: 0; }
.step__kicker { font-size: var(--fs-eyebrow); font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--cz-cyan-700); }
.step__title { font-size: clamp(1.625rem, 1.25rem + 1.3vw, 2.25rem); letter-spacing: -0.03em; line-height: 1.12; margin-top: calc(var(--sp-3) * -1); }
.step__title:focus { outline: none; }
.phase-list code { align-self: flex-start; }
.step__title code { font-size: 0.78em; }
.step__lead { color: var(--text-2); font-size: 1.0625rem; line-height: 1.6; }
.step__visual { display: flex; flex-direction: column; gap: var(--sp-4); min-width: 0; }

.points { display: grid; gap: var(--sp-3); }
.points li {
  position: relative;
  padding-left: var(--sp-5);
  color: var(--cz-slate-700);
  font-size: 0.9375rem;
  line-height: 1.55;
}
.points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cz-cyan-500);
}
.points b { color: var(--text); font-weight: 650; }

.visual-label { font-size: var(--fs-eyebrow); font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-3); }
.illustrative {
  position: relative;
  margin: 0;
  padding-left: 14px;
  font-size: var(--fs-xs);
  color: var(--text-3);
  line-height: 1.5;
}
.illustrative::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #D99A2B;
}
.code-block__label { font-size: var(--fs-xs); font-weight: 700; color: var(--text-3); margin-bottom: var(--sp-2); }
.code { white-space: pre-wrap; overflow-wrap: anywhere; }

.pipe-head { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-3); flex-wrap: wrap; }
.pipe-head__controls { display: flex; gap: var(--sp-2); }

/* Segmented control */
.segmented {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 2px;
  padding: 3px;
  border-radius: var(--radius-pill);
  background: var(--bg-muted);
  width: fit-content;
  max-width: 100%;
}
.segmented__btn {
  min-height: 36px;
  padding: 0 var(--sp-4);
  border: 0;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--text-2);
  font-size: var(--fs-xs);
  font-weight: 650;
  cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.segmented__btn:hover { color: var(--text); }
.segmented__btn[aria-pressed="true"] { background: #fff; color: var(--text); box-shadow: var(--shadow-1), inset 0 0 0 1px var(--line); }

/* --------------------------------------------------------------------------
   Step 1 · Lanes
   -------------------------------------------------------------------------- */
.lanes {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 44px minmax(0, 1fr);
  grid-template-rows: auto 36px auto;
  column-gap: 0;
  align-items: stretch;
}
.lane {
  padding: var(--sp-5);
  border-radius: var(--radius-lg);
  border: 1px solid var(--lane-line);
  background: var(--lane-soft);
  transition: opacity var(--dur) var(--ease), filter var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.lane--credits { --lane-line: var(--path-credits-line); --lane-soft: var(--path-credits-soft); --lane-text: var(--cz-blue-800); --lane-accent: var(--path-credits); }
.lane--tokens { --lane-line: var(--path-tokens-line); --lane-soft: var(--path-tokens-soft); --lane-text: var(--path-tokens-text); --lane-accent: var(--path-tokens); }
.lane__tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--fs-eyebrow);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--lane-text);
}
.lane__tag::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--lane-accent); }
.lane__title { margin-top: var(--sp-1); font-size: 1.0625rem; font-weight: 700; letter-spacing: -0.01em; line-height: 1.3; }
.lane__facts { display: grid; margin-top: var(--sp-4); }
.lane__facts > div { display: grid; gap: 2px; padding-block: var(--sp-2); border-top: 1px solid var(--lane-line); }
.lane__facts dt { font-size: 0.6875rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-3); }
.lane__facts dd { font-size: var(--fs-small); color: var(--text); font-weight: 550; line-height: 1.45; }
.lane__facts code { background: #fff !important; }

.lanes__neq { display: grid; place-items: center; }
.lanes__neq span {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--line-strong);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1;
  box-shadow: var(--shadow-1);
}

.lanes__merge { grid-column: 1 / -1; position: relative; }
.lanes__line { position: absolute; top: 0; bottom: 0; width: 2px; transition: opacity var(--dur) var(--ease); }
.lanes__line--a { left: 25%; background: var(--path-credits); }
.lanes__line--b { right: 25%; background: var(--path-tokens); }
.lanes__line::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: -4px;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid currentColor;
}
.lanes__line--a::after { color: var(--path-credits); }
.lanes__line--b::after { color: var(--path-tokens); }

.consumption {
  grid-column: 1 / -1;
  padding: var(--sp-5);
  border-radius: var(--radius-lg);
  background: var(--cz-navy-950);
  color: #C9D6E4;
}
.consumption__title { display: flex; align-items: center; gap: var(--sp-2); flex-wrap: wrap; color: #fff; font-weight: 650; font-size: 0.9375rem; }
.consumption__title code { background: rgba(255, 255, 255, 0.12) !important; color: #fff !important; }
.consumption__cols { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--sp-3); margin-top: var(--sp-4); }
.consumption__col {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.06);
  border-left: 3px solid var(--col-accent);
  transition: opacity var(--dur) var(--ease);
}
.consumption__col span { font-size: var(--fs-xs); color: #9DB0C2; font-weight: 600; }
.consumption__col b { color: #fff; font-size: var(--fs-small); font-weight: 650; }
.consumption__col--credits { --col-accent: #5C8BFF; }
.consumption__col--tokens { --col-accent: var(--cz-cyan-500); }
.consumption__foot { margin-top: var(--sp-3); font-size: var(--fs-xs); color: #9DB0C2; }

.lanes[data-focus="credits"] .lane--tokens,
.lanes[data-focus="tokens"] .lane--credits { opacity: 0.35; filter: saturate(0.3); }
.lanes[data-focus="credits"] .lanes__line--b,
.lanes[data-focus="tokens"] .lanes__line--a { opacity: 0.15; }
.lanes[data-focus="credits"] .consumption__col--tokens,
.lanes[data-focus="tokens"] .consumption__col--credits { opacity: 0.35; }
.lanes[data-focus="credits"] .lane--credits,
.lanes[data-focus="tokens"] .lane--tokens { box-shadow: 0 0 0 3px var(--lane-line), var(--shadow-2); }

/* --------------------------------------------------------------------------
   Step 2 · Credit pipeline
   -------------------------------------------------------------------------- */
.pipe { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: var(--sp-2); position: relative; }
.pipe__stage {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--sp-2);
  min-height: 112px;
  padding: var(--sp-3);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: #fff;
  color: var(--text-2);
  font-size: var(--fs-xs);
  font-weight: 650;
  line-height: 1.3;
  text-align: left;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease), color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.pipe__stage:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 29px;
  right: -9px;
  width: 8px;
  height: 2px;
  background: var(--line-strong);
}
.pipe__stage:hover { border-color: var(--cz-slate-400); color: var(--text); }
.pipe__i {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: var(--bg-muted);
  color: var(--cz-slate-700);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.pipe__n { position: absolute; top: var(--sp-3); right: var(--sp-3); color: var(--text-3); font-size: 0.6875rem; }
.pipe__l code { font-size: 0.92em; }
.pipe__stage.is-done { border-color: var(--path-credits-line); }
.pipe__stage.is-done .pipe__i { background: var(--path-credits-soft); color: var(--cz-blue-700); }
.pipe__stage.is-done::after { background: var(--path-credits); }
.pipe__stage[aria-selected="true"] {
  border-color: var(--cz-blue-600);
  background: var(--path-credits-soft);
  color: var(--text);
  box-shadow: 0 0 0 3px rgba(41, 98, 255, 0.14);
}
.pipe__stage[aria-selected="true"] .pipe__i { background: var(--cz-blue-600); color: #fff; }

.stage-panels {
  padding: var(--sp-5);
  border-radius: var(--radius-lg);
  background: var(--bg-subtle);
  border: 1px solid var(--line);
  min-height: 220px;
}
.stage-panel { display: flex; flex-direction: column; gap: var(--sp-3); animation: step-in var(--dur) var(--ease) both; }
.stage-panel[hidden] { display: none; }
.stage-panel:focus { outline: none; }
.stage-panel:focus-visible { outline: 2px solid var(--focus); outline-offset: 6px; border-radius: var(--radius-sm); }
.stage-panel__title { font-size: 1.0625rem; font-weight: 700; letter-spacing: -0.01em; color: var(--text); }
.stage-panel p { color: var(--cz-slate-700); font-size: 0.9375rem; line-height: 1.6; }
.stage-panel p.illustrative { font-size: var(--fs-xs); color: var(--text-3); }

.mini-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius-md); overflow: hidden; box-shadow: inset 0 0 0 1px var(--line); font-size: var(--fs-small); }
.mini-table th, .mini-table td { padding: var(--sp-2) var(--sp-4); text-align: left; border-bottom: 1px solid var(--line); }
.mini-table th { font-size: var(--fs-xs); font-weight: 700; color: var(--text-3); background: var(--bg-subtle); font-family: var(--font-mono); }
.mini-table tr:last-child td { border-bottom: 0; }
.mini-table .r, .rollup__table .r { text-align: right; }

.allowance { display: grid; gap: var(--sp-3); padding: var(--sp-4); border-radius: var(--radius-md); background: #fff; border: 1px solid var(--line); }
.allowance__row { display: grid; grid-template-columns: 9.5rem minmax(0, 1fr) 3.5rem; align-items: center; gap: var(--sp-3); font-size: var(--fs-small); }
.allowance__row .num { text-align: right; font-weight: 700; }
.allowance__track { position: relative; height: 10px; border-radius: 6px; background: var(--bg-muted); overflow: hidden; }
.allowance__track i {
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--v);
  border-radius: 6px;
  background: var(--path-credits);
  transform-origin: left center;
  animation: grow var(--dur-slow) var(--ease) both;
}
@keyframes grow { from { transform: scaleX(0); } to { transform: scaleX(1); } }
.allowance__scale { display: flex; justify-content: space-between; margin-left: calc(9.5rem + var(--sp-3)); margin-right: calc(3.5rem + var(--sp-3)); font-size: 0.6875rem; color: var(--text-3) !important; }

/* --------------------------------------------------------------------------
   Step 3 · Gateway architecture
   -------------------------------------------------------------------------- */
.phase-list { display: grid; gap: var(--sp-2); counter-reset: phase; }
.phase-list li {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: var(--sp-3) var(--sp-4) var(--sp-3) calc(var(--sp-4) + 30px);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  color: var(--text-3);
  font-size: var(--fs-small);
  line-height: 1.5;
  counter-increment: phase;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.phase-list li::before {
  content: counter(phase);
  position: absolute;
  left: var(--sp-3);
  top: var(--sp-3);
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  background: #fff;
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--text-3);
}
.phase-list b { color: var(--text-2); font-weight: 650; }
.phase-list li.is-done b { color: var(--text); }
.phase-list li.is-done::before { content: "✓"; background: var(--cz-navy-950); border-color: var(--cz-navy-950); color: #fff; }
.phase-list li.is-active { background: var(--path-tokens-soft); border-color: var(--path-tokens-line); color: var(--cz-slate-700); }
.phase-list li.is-active b { color: var(--text); }
.phase-list li.is-active::before { background: var(--path-tokens); border-color: var(--path-tokens); color: var(--cz-navy-950); }

.arch {
  display: grid;
  gap: var(--sp-4);
  padding: var(--sp-5);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(var(--bg-subtle), var(--bg-subtle)) padding-box,
    repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 24px);
  border: 1px solid var(--line);
}
.arch__row { display: grid; grid-template-columns: minmax(0, 1fr) 48px minmax(0, 1.25fr) 48px minmax(0, 1fr); align-items: center; }
.arch__node {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: var(--sp-4);
  border-radius: var(--radius-md);
  background: #fff;
  border: 1px solid var(--line);
  font-size: var(--fs-xs);
  min-width: 0;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.arch__node b { font-size: 0.9375rem; font-weight: 700; letter-spacing: -0.01em; line-height: 1.25; }
.arch__i {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  margin-bottom: var(--sp-2);
  border-radius: 10px;
  background: var(--bg-muted);
  color: var(--cz-slate-700);
}
.arch__k { font-size: 0.6875rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-3); }
.arch__s { color: var(--text-3); line-height: 1.4; }
.arch__node--gw { border-color: var(--path-tokens-line); box-shadow: 0 0 0 4px var(--path-tokens-soft); padding-top: var(--sp-6); }
.arch__node--gw .arch__i { background: var(--path-tokens); color: var(--cz-navy-950); }
.arch__flag {
  position: absolute;
  top: -11px;
  left: var(--sp-4);
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  background: var(--cz-navy-950);
  color: #fff;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.arch__policy {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: var(--sp-2);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  background: var(--path-tokens-soft);
  color: var(--path-tokens-text);
  font-weight: 700;
}
.arch__counts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-2);
  margin-top: var(--sp-2);
  opacity: 0.25;
  transition: opacity var(--dur) var(--ease);
}
.arch__counts span { display: flex; flex-direction: column; padding: 6px 8px; border-radius: var(--radius-sm); background: var(--bg-subtle); border: 1px solid var(--line); }
.arch__counts small { font-size: 0.625rem; font-weight: 700; color: var(--text-3); text-transform: uppercase; letter-spacing: 0.06em; }
.arch__counts b { font-size: 0.875rem; }
.arch__models { display: flex; flex-wrap: wrap; gap: 4px; margin-block: 4px 2px; }
.arch__models span { padding: 2px 8px; border-radius: var(--radius-pill); background: var(--bg-muted); color: var(--cz-slate-700); font-weight: 650; }

.arch__wire { position: relative; height: 2px; margin-inline: 4px; background: var(--line-strong); transition: background-color var(--dur) var(--ease); }
.arch__wire::after {
  content: "";
  position: absolute;
  right: -2px;
  top: -4px;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 6px solid var(--line-strong);
  transition: border-color var(--dur) var(--ease);
}
.arch__packet {
  position: absolute;
  top: -5px;
  left: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--path-tokens);
  box-shadow: 0 0 0 4px rgba(34, 184, 230, 0.2);
  opacity: 0;
}

.arch__record {
  padding: var(--sp-4);
  border-radius: var(--radius-md);
  background: var(--cz-navy-950);
  color: #C9D6E4;
  opacity: 0.35;
  transition: opacity var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.arch__record-title { display: flex; align-items: center; gap: var(--sp-2); color: #fff; font-weight: 650; font-size: var(--fs-small); }
.arch__record-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: var(--sp-3); margin-top: var(--sp-3); }
.arch__record-grid dt { font-family: var(--font-mono); font-size: 0.6875rem; color: #8FA3B9; }
.arch__record-grid dd { color: #fff; font-size: var(--fs-small); font-weight: 600; overflow-wrap: anywhere; }
.arch__record-grid dd.mono { font-size: 0.8125rem; }

.arch__caption {
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-md);
  background: #fff;
  border: 1px solid var(--line);
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--text);
}

/* phase states */
.arch[data-phase="1"] .arch__node--agent { border-color: var(--path-tokens); }
.arch[data-phase="1"] .arch__wire--in,
.arch[data-phase="2"] .arch__wire--in,
.arch[data-phase="3"] .arch__wire--in,
.arch[data-phase="4"] .arch__wire--in { background: var(--path-tokens); }
.arch[data-phase="1"] .arch__wire--in::after,
.arch[data-phase="2"] .arch__wire--in::after,
.arch[data-phase="3"] .arch__wire--in::after,
.arch[data-phase="4"] .arch__wire--in::after { border-left-color: var(--path-tokens); }
.arch[data-phase="1"] .arch__wire--in .arch__packet { animation: packet 1.6s var(--ease) infinite; }
.arch[data-phase="1"] .arch__node--model,
.arch[data-phase="2"] .arch__node--model { opacity: 0.55; }
.arch[data-phase="2"] .arch__counts,
.arch[data-phase="3"] .arch__counts,
.arch[data-phase="4"] .arch__counts { opacity: 1; }
.arch[data-phase="2"] .arch__node--gw { box-shadow: 0 0 0 4px var(--path-tokens-line), var(--shadow-2); }
.arch[data-phase="2"] .arch__counts span { animation: pulse 1.8s var(--ease) 1; }
.arch[data-phase="3"] .arch__wire--out,
.arch[data-phase="4"] .arch__wire--out { background: var(--path-tokens); }
.arch[data-phase="3"] .arch__wire--out::after,
.arch[data-phase="4"] .arch__wire--out::after { border-left-color: var(--path-tokens); }
.arch[data-phase="3"] .arch__wire--out .arch__packet { animation: packet 1.6s var(--ease) infinite; }
.arch[data-phase="3"] .arch__node--model { border-color: var(--path-tokens); }
.arch[data-phase="4"] .arch__record { opacity: 1; box-shadow: 0 0 0 4px var(--path-tokens-line); }

@keyframes packet {
  0% { left: 0; opacity: 0; }
  15% { opacity: 1; }
  85% { opacity: 1; }
  100% { left: calc(100% - 12px); opacity: 0; }
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(34, 184, 230, 0.45); }
  100% { box-shadow: 0 0 0 10px rgba(34, 184, 230, 0); }
}

/* --------------------------------------------------------------------------
   Step 4 · Calculator
   -------------------------------------------------------------------------- */
.formula-card { padding: var(--sp-5); border-radius: var(--radius-lg); background: var(--cz-navy-950); color: #fff; }
.formula-card__label { font-size: var(--fs-eyebrow); font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: #7FD8F5; }
.formula-card__f {
  display: grid;
  grid-template-columns: 1.25rem minmax(0, 1fr);
  row-gap: var(--sp-1);
  margin-top: var(--sp-3);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.5;
}
.formula-card__op { color: #7FD8F5; font-weight: 700; }
.formula-card__f code { background: rgba(255, 255, 255, 0.12) !important; color: #fff !important; }

.calc { display: flex; flex-direction: column; gap: var(--sp-4); }
.calc__warning {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--radius-md);
  background: var(--cz-amber-50);
  border: 1px solid #F1DDB8;
  color: #6E460B;
  font-size: var(--fs-small);
  font-weight: 700;
}
.calc__form { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--sp-4); }
.calc__group {
  display: grid;
  gap: var(--sp-3);
  margin: 0;
  padding: var(--sp-4);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  min-width: 0;
}
.calc__group legend {
  padding: 0 var(--sp-2);
  margin-left: calc(var(--sp-2) * -1);
  font-size: var(--fs-eyebrow);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
}
.calc__group .field { gap: 6px; }
.calc__group .field__label { flex-wrap: wrap; }

.calc__result {
  display: grid;
  gap: var(--sp-3);
  padding: var(--sp-5);
  border-radius: var(--radius-lg);
  background: var(--bg-subtle);
  border: 1px solid var(--line);
}
.calc__line {
  display: grid;
  grid-template-columns: 6.5rem minmax(0, 1fr) auto;
  gap: var(--sp-3);
  align-items: baseline;
  font-size: var(--fs-small);
}
.calc__line > span:first-child { font-weight: 650; }
.calc__expr { color: var(--text-3); font-size: 0.75rem; overflow-wrap: anywhere; }
.calc__line b { font-size: 1rem; font-weight: 700; }
.calc__share { display: flex; height: 8px; border-radius: 6px; overflow: hidden; background: var(--line); }
.calc__share i { display: block; height: 100%; width: 0; transition: width var(--dur) var(--ease); }
.calc__share-in { background: var(--cz-navy-950); }
.calc__share-out { background: var(--path-tokens); }
.calc__total {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--sp-3);
  flex-wrap: wrap;
  padding-top: var(--sp-3);
  border-top: 1px solid var(--line-strong);
  font-size: var(--fs-small);
  font-weight: 650;
}
.calc__total b { font-size: 1.75rem; font-weight: 700; letter-spacing: -0.02em; }
.calc__status:empty { display: none; }
.calc__status { font-size: var(--fs-xs); font-weight: 650; color: var(--cz-red-700); }
.calc__actions { display: flex; justify-content: space-between; align-items: flex-start; gap: var(--sp-4); }
.calc__caption { max-width: 34rem; }
.calc__actions .btn { flex: none; }
@media (max-width: 640px) {
  .calc__actions { flex-direction: column; }
}

/* --------------------------------------------------------------------------
   Step 5 · Attribution
   -------------------------------------------------------------------------- */
.join-map {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  grid-template-rows: auto auto auto;
  gap: var(--sp-3) var(--sp-8);
  padding: var(--sp-5);
  border-radius: var(--radius-lg);
  background: var(--bg-subtle);
  border: 1px solid var(--line);
}
.join-map::before, .join-map::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 2px;
  background: var(--line-strong);
  transform: translateX(-1px);
}
.join-map::before { top: var(--sp-5); height: calc(50% - var(--sp-5)); }
.join-map::after { bottom: var(--sp-5); height: calc(50% - var(--sp-5)); }
.join-map__src {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-md);
  background: #fff;
  border: 1px solid var(--line);
  min-width: 0;
}
.join-map__src b { font-size: var(--fs-small); font-weight: 700; overflow-wrap: anywhere; }
.join-map__k { font-size: 0.6875rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-3); }
.join-map__src--credits { border-left: 3px solid var(--path-credits); }
.join-map__src--tokens { border-left: 3px solid var(--path-tokens); }
.join-map__key {
  position: relative;
  z-index: 1;
  grid-column: 1 / -1;
  justify-self: center;
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-5);
  border-radius: var(--radius-pill);
  background: var(--cz-navy-950);
  color: #fff;
  font-size: var(--fs-small);
  font-weight: 650;
  box-shadow: 0 0 0 6px var(--bg-subtle);
}

.rollup { display: grid; gap: var(--sp-3); }
.rollup__head { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-3); flex-wrap: wrap; }
.table-wrap { overflow-x: auto; border-radius: var(--radius-md); border: 1px solid var(--line); }
.rollup__table { width: 100%; min-width: 520px; border-collapse: collapse; font-size: var(--fs-small); background: #fff; }
.rollup__table th, .rollup__table td { padding: var(--sp-2) var(--sp-4); border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
.rollup__table th { font-size: var(--fs-xs); font-weight: 700; color: var(--text-3); background: var(--bg-subtle); }
.rollup__table tbody tr:last-child td { border-bottom: 0; }
.rollup__table td:first-child { font-weight: 650; }
.rollup__table td.num { font-variant-numeric: tabular-nums; }
.rollup__table tbody tr { animation: step-in var(--dur) var(--ease) both; }

/* --------------------------------------------------------------------------
   Step 6 · Delivery & value
   -------------------------------------------------------------------------- */
.value { display: grid; gap: 0; }
.value__lanes { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--sp-3); }
.value__lane {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  padding: var(--sp-4);
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid var(--line);
  border-top: 3px solid var(--lane-accent);
  min-width: 0;
}
.value__lane--delivery { --lane-accent: var(--cz-navy-950); }
.value__lane--agent { --lane-accent: #6A4FE0; }
.value__lane--spend { --lane-accent: var(--path-tokens); }
.value__tag { display: flex; align-items: center; gap: 6px; font-size: var(--fs-eyebrow); font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--cz-slate-700); }
.value__flow { display: grid; gap: 0; }
.value__flow li {
  position: relative;
  padding: var(--sp-2) 0 var(--sp-2) var(--sp-5);
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--cz-slate-700);
  line-height: 1.45;
}
.value__flow li::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 0.95em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--lane-accent);
}
.value__flow li:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 6px;
  top: calc(0.95em + 9px);
  bottom: -0.55em;
  width: 1px;
  background: var(--line-strong);
}
.value__commit { display: inline-block; font-size: 0.6875rem !important; line-height: 1.5; }

.value__join { position: relative; height: 64px; }
.value__join i {
  position: absolute;
  top: 0;
  width: 2px;
  height: 34px;
  background: var(--line-strong);
  transition: background-color var(--dur) var(--ease);
}
.value__join i:nth-child(1) { left: 16.66%; }
.value__join i:nth-child(2) { left: 50%; }
.value__join i:nth-child(3) { left: 83.33%; }
.value__join::before {
  content: "";
  position: absolute;
  top: 34px;
  left: 16.66%;
  right: 16.66%;
  height: 2px;
  background: var(--line-strong);
  transition: background-color var(--dur) var(--ease);
}
.value__join span {
  position: absolute;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  padding: 2px 12px;
  border-radius: var(--radius-pill);
  background: #fff;
  border: 1px solid var(--line-strong);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-2);
  white-space: nowrap;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.value[data-joined="true"] .value__join i,
.value[data-joined="true"] .value__join::before { background: var(--cz-navy-950); }
.value[data-joined="true"] .value__join span { background: var(--cz-navy-950); border-color: var(--cz-navy-950); color: #fff; }

.value__result {
  padding: var(--sp-5);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--line-strong);
  background: var(--bg-subtle);
  min-height: 120px;
}
.value[data-joined="true"] .value__result { border-style: solid; background: #fff; box-shadow: var(--shadow-2); }
.value__placeholder { display: grid; place-items: center; min-height: 80px; font-size: var(--fs-small); color: var(--text-3); text-align: center; }
.value__record { animation: step-in var(--dur-slow) var(--ease) both; display: grid; gap: var(--sp-3); }
.value__record[hidden] { display: none; }
.value__record-title { font-weight: 700; }
.value__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: var(--sp-3); }
.value__grid > div { padding: var(--sp-3); border-radius: var(--radius-md); background: var(--bg-subtle); border: 1px solid var(--line); }
.value__grid dt { font-size: 0.6875rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-3); }
.value__grid dd { font-size: var(--fs-small); font-weight: 650; color: var(--text); }
.value__grid dd.value__src { font-size: 0.6875rem; font-weight: 600; color: var(--cz-cyan-700); margin-top: 2px; }

/* --------------------------------------------------------------------------
   Step 7 · Summary
   -------------------------------------------------------------------------- */
.summary { display: grid; gap: var(--sp-2); }
.summary li {
  display: flex;
  gap: var(--sp-4);
  align-items: flex-start;
  padding: var(--sp-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: #fff;
  font-size: 0.9375rem;
  color: var(--text-2);
  line-height: 1.55;
  animation: step-in var(--dur-slow) var(--ease) both;
}
.summary li:nth-child(2) { animation-delay: 60ms; }
.summary li:nth-child(3) { animation-delay: 120ms; }
.summary li:nth-child(4) { animation-delay: 180ms; }
.summary li:nth-child(5) { animation-delay: 240ms; }
.summary b { display: block; color: var(--text); font-weight: 650; }
.summary__i {
  display: grid;
  place-items: center;
  flex: none;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--bg-muted);
  color: var(--cz-slate-700);
}
.summary__i--credits { background: var(--path-credits-soft); color: var(--cz-blue-700); }
.summary__i--tokens { background: var(--path-tokens-soft); color: var(--path-tokens-text); }
.summary-actions { display: flex; flex-wrap: wrap; gap: var(--sp-3); margin-top: var(--sp-2); }

/* --------------------------------------------------------------------------
   Controls
   -------------------------------------------------------------------------- */
.controls {
  position: sticky;
  bottom: 0;
  z-index: 30;
  background: rgba(255, 255, 255, 0.94);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--line);
}
.controls__inner {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  max-width: calc(var(--content-max) + var(--gutter) * 2);
  min-height: 72px;
  margin-inline: auto;
  padding: var(--sp-3) var(--gutter);
}
.controls__count { margin-left: auto; font-size: var(--fs-small); font-weight: 700; color: var(--text-3); font-variant-numeric: tabular-nums; }
.controls__count span { color: var(--text); }
.controls__nav { display: flex; gap: var(--sp-2); }
.controls__nav .btn { min-width: 132px; }

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 1080px) {
  .wt-header__badge { display: none; }
  .step { grid-template-columns: minmax(0, 1fr); }
  .phase-list { display: none; }
  .progress__l { display: none; }
  .progress__btn { justify-content: center; padding-inline: 0; }
  .wt-intro__inner { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 820px) {
  .pipe { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .pipe__stage:nth-child(3n)::after { display: none; }
  .arch__row { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .arch__wire { width: 2px; height: 28px; margin: 4px auto; }
  .arch__wire::after { right: -4px; top: auto; bottom: -2px; border-left: 5px solid transparent; border-right: 5px solid transparent; border-top: 6px solid var(--line-strong); border-bottom: 0; }
  .arch[data-phase] .arch__wire--in::after,
  .arch[data-phase="3"] .arch__wire--out::after,
  .arch[data-phase="4"] .arch__wire--out::after { border-left-color: transparent; }
  .arch[data-phase] .arch__wire--in::after { border-top-color: var(--path-tokens); }
  .arch[data-phase="3"] .arch__wire--out::after,
  .arch[data-phase="4"] .arch__wire--out::after { border-top-color: var(--path-tokens); }
  .arch__packet { left: -5px; top: 0; }
  .arch[data-phase] .arch__wire .arch__packet { animation-name: packet-v; }
  .arch__node--gw { margin-top: var(--sp-3); }
  .arch__record-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .value__lanes { grid-template-columns: minmax(0, 1fr); }
  .value__join { height: 48px; }
  .value__join i:nth-child(1), .value__join i:nth-child(3), .value__join::before { display: none; }
  .value__join i:nth-child(2) { height: 48px; }
  .value__join span { top: 12px; }
  .calc__form { grid-template-columns: minmax(0, 1fr); }
}

@keyframes packet-v {
  0% { top: 0; opacity: 0; }
  15% { opacity: 1; }
  85% { opacity: 1; }
  100% { top: calc(100% - 12px); opacity: 0; }
}

@media (max-width: 640px) {
  .wt-header__divider, .wt-header__title { display: none; }
  .wt-header__back span { display: none; }
  .wt-header__back { width: 40px; padding: 0; }
  .lanes { grid-template-columns: minmax(0, 1fr); grid-template-rows: none; }
  .lanes__neq { padding-block: var(--sp-2); }
  .lanes__merge { height: 28px; }
  .lanes__line--a { left: 40%; }
  .lanes__line--b { right: 40%; }
  .consumption__cols { grid-template-columns: minmax(0, 1fr); }
  .pipe { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pipe__stage { min-height: 96px; }
  .pipe__stage::after { display: none; }
  .allowance__row { grid-template-columns: minmax(0, 1fr) 3rem; }
  .allowance__row .allowance__track { grid-column: 1 / -1; grid-row: 2; }
  .allowance__scale { margin: 0; }
  .join-map { grid-template-columns: minmax(0, 1fr); gap: var(--sp-2); }
  .join-map::before, .join-map::after { display: none; }
  .join-map__key { order: -1; justify-self: stretch; justify-content: center; box-shadow: none; }
  .calc__line { grid-template-columns: minmax(0, 1fr) auto; }
  .calc__expr { grid-column: 1 / -1; grid-row: 2; }
  .controls__inner { gap: var(--sp-2); }
  .controls__nav .btn { min-width: 0; padding-inline: var(--sp-4); }
  .controls__count { font-size: var(--fs-xs); }
  #restart-btn { padding-inline: var(--sp-2); }
  .stage { padding-inline: var(--sp-3); }
  .step { padding: var(--sp-5); border-radius: var(--radius-lg); }
}

@media (max-width: 400px) {
  #prev-btn { font-size: 0; gap: 0; }
  #prev-btn .icon { margin: 0; }
  #prev-btn { width: 44px; padding: 0; }
  .controls__nav .btn--dark { padding-inline: var(--sp-4); }
}