/* =====================================================================
   /method/ : how the work is organised. Page styles (prefix method-).
   Colour roles: the four passes take the four brand stripes in order
   (pass 0 amber, pass 1 orange, pass 2 crimson, pass 3 purple).
   ===================================================================== */

.page-method .section { padding-block: clamp(64px, 7.5vw, 120px); }
.page-method .section h2 { text-wrap: balance; }

/* ---------- shared bits ---------- */
.method-figlabel { font: 500 11.5px/1.4 var(--font-mono); letter-spacing: 0.03em; color: var(--ink-2); text-transform: uppercase; margin-bottom: 18px; }
.method-figlabel--amber { color: var(--amber); }
.method-cap { font: 400 12.5px/1.6 var(--font-mono); color: var(--ink-3); max-width: 96ch; margin-top: 18px; }
.method-cap a { color: var(--ink-2); }
.method-cap .chip { margin-left: 4px; }
.method-head { margin-bottom: clamp(36px, 4.5vw, 64px); }
.method-head .lead { max-width: 52ch; }
@media (min-width: 1000px) {
  .method-head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(320px, 44ch); column-gap: clamp(32px, 4vw, 72px); align-items: end; }
  .method-head > .kicker { grid-column: 1 / -1; }
  .page-method .method-head > h2 + .lead { margin-top: 0; padding-bottom: 0.3em; font-size: clamp(18px, 1.45vw, 22px); }
}

/* compute-tier pips: four squares, lit up to the tier */
.method-pips { display: inline-grid; grid-template-columns: repeat(4, 7px); gap: 2px; margin-right: 8px; vertical-align: 0.05em; }
.method-pips i { display: block; height: 7px; background: var(--ink-3); opacity: 0.3; }
.method-pips--1 i:nth-child(-n + 1), .method-pips--2 i:nth-child(-n + 2), .method-pips--3 i:nth-child(-n + 3), .method-pips--4 i { opacity: 1; }
.method-pips i:nth-child(1) { background: var(--amber); }
.method-pips i:nth-child(2) { background: var(--orange); }
.method-pips i:nth-child(3) { background: var(--crimson); }
.method-pips i:nth-child(4) { background: var(--purple-ink); }

/* ---------- 0. hero ---------- */
.method-hero { position: relative; padding-block: clamp(20px, 3vw, 40px) clamp(48px, 6vw, 88px); }
.method-hero::before { content: ""; position: absolute; inset: 0 0 auto auto; width: 62%; height: 90%; background: radial-gradient(50% 50% at 64% 44%, rgba(235, 91, 0, 0.14), transparent 70%); pointer-events: none; z-index: -1; }
.method-hero__grid { display: grid; grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr); grid-template-areas: "text fig" "read read"; gap: 0 clamp(28px, 4vw, 64px); align-items: start; }
.method-hero__text { grid-area: text; padding-top: clamp(8px, 2vw, 28px); }
.method-hero__h1 { font-size: clamp(60px, 8vw, 132px); margin-top: clamp(12px, 1.6vw, 24px); margin-left: -0.04em; }
.method-hero__lead { font: 400 clamp(20px, 1.7vw, 25px)/1.36 var(--font-text); letter-spacing: -0.014em; color: var(--ink); max-width: 34ch; margin-top: clamp(24px, 2.6vw, 40px); text-wrap: pretty; }
.method-readouts { grid-area: read; list-style: none; padding: 0; margin: clamp(40px, 4.4vw, 72px) 0 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--line-2); }
.method-readouts li { display: grid; align-content: start; gap: 8px; padding: 16px 16px 4px 20px; border-left: 1px solid var(--line); }
.method-readouts li:first-child { padding-left: 0; border-left: 0; }
.method-readouts__k { font: 500 11.5px/1 var(--font-mono); letter-spacing: 0.03em; color: var(--amber); }
.method-readouts__v { font: 400 clamp(40px, 4vw, 64px)/0.92 var(--font-display); letter-spacing: -0.05em; white-space: nowrap; }
.method-readouts__v sup { font-size: 0.5em; vertical-align: 0.9em; letter-spacing: 0; margin-left: 0.04em; }
.method-readouts__x { color: var(--amber); margin: 0 0.06em; font-size: 0.7em; vertical-align: 0.1em; }
.method-readouts__n { font: 400 12.5px/1.5 var(--font-mono); color: var(--ink-2); max-width: 30ch; }

.method-hero__fig { grid-area: fig; align-self: end; margin: 28px 0 0; }
.method-hero__media { position: relative; border-radius: 10px; overflow: hidden; aspect-ratio: 1672 / 941; background: var(--bg-deep); }
.method-hero__media img { width: 100%; height: 100%; object-fit: cover; }
.method-hero__media::after { content: ""; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(180deg, rgba(18, 18, 18, 0.25), transparent 22%, transparent 78%, rgba(18, 18, 18, 0.45)); }
.method-hero__fallback { position: absolute; inset: 0; background: radial-gradient(60% 50% at 50% 60%, var(--orange), var(--purple) 60%, var(--bg-deep)); }
.method-hero__cap { font: 400 12px/1.6 var(--font-mono); color: var(--ink-3); margin-top: 12px; max-width: 64ch; }
.method-callout { position: absolute; z-index: 2; font: 500 11px/1 var(--font-mono); letter-spacing: 0.04em; color: #fff; background: rgba(18, 18, 18, 0.74); padding: 6px 8px; border-radius: 3px; white-space: nowrap; -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px); }
.method-callout::after { content: ""; position: absolute; left: 14px; top: 100%; width: 1px; height: 22px; background: rgba(255, 255, 255, 0.6); }
/* positions on the 16:9 method-passes picture: clay left, wire centre, steel right */
.method-callout--clay { top: 6%; left: 9%; }
.method-callout--wire { top: 10%; left: 38%; }
.method-callout--steel { top: 21%; left: 71%; }
.method-callout--steel::after { height: 26px; }

@media (max-width: 1080px) {
  .method-hero__grid { grid-template-columns: 1fr; grid-template-areas: "text" "fig" "read"; }
  .method-hero__fig { margin-top: 32px; }
  .method-readouts { margin-top: 36px; }
}
@media (max-width: 720px) {
  .method-readouts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .method-readouts li { padding: 14px 10px 16px 14px; }
  .method-readouts li:nth-child(odd) { padding-left: 0; border-left: 0; }
  .method-readouts li:nth-child(n + 3) { border-top: 1px solid var(--line); }
  .method-readouts__v { font-size: 40px; }
  .method-callout { font-size: 9.5px; padding: 4px 5px; }
  .method-callout::after { height: 12px; left: 10px; }
  .method-callout--clay { top: 4%; left: 4%; }
  .method-callout--wire { top: 9%; left: 35%; }
  .method-callout--steel { top: 20%; left: 67%; }
}
@media (max-width: 460px) {
  .method-callout { display: none; }
}

/* ---------- 1. in short ---------- */
.method-short .kicker { margin-bottom: 28px; }
.method-short__list { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(20px, 2.4vw, 40px); }
.method-short__list li { display: grid; align-content: start; gap: 14px; padding-top: 16px; border-top: 1px solid var(--line-2); }
.method-short__n { font: 500 12px/1 var(--font-mono); color: var(--amber); }
.method-short__list p { font: 400 clamp(18px, 1.5vw, 22px)/1.36 var(--font-text); letter-spacing: -0.012em; color: var(--ink-2); text-wrap: pretty; }
.method-short__list strong { color: var(--ink); font-weight: 400; }
@media (max-width: 1000px) { .method-short__list { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .method-short__list { grid-template-columns: 1fr; } }

/* ---------- 2. the resolution ladder ---------- */
.method-ladder { margin: 0; }
.method-ladder__steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 3px; }
.method-step { --c: var(--amber); --on: var(--on-amber); display: grid; grid-template-rows: auto 1fr; min-width: 0; }
.method-step--orange { --c: var(--orange); --on: var(--on-orange); }
.method-step--crimson { --c: var(--crimson); --on: #fff; }
.method-step--purple { --c: var(--purple); --on: #fff; }
.method-step__stage { height: 360px; display: flex; flex-direction: column; justify-content: flex-end; }
.method-glyph { width: clamp(92px, 9vw, 128px); height: auto; margin: 0 0 10px 18px; overflow: visible; }
.method-step__block { height: calc(72px + var(--i) * 64px); background: var(--c); color: var(--on); padding: 12px clamp(14px, 1.4vw, 20px); display: flex; flex-direction: column; justify-content: space-between; transform-origin: bottom; }
.method-step__num { font: 400 clamp(44px, 4.4vw, 68px)/0.86 var(--font-display); letter-spacing: var(--track-display); }
.method-step__tier { font: 500 11px/1.2 var(--font-mono); letter-spacing: 0.04em; }
.method-step__block { flex-direction: row; align-items: flex-start; gap: 12px; }
.method-step__tier { margin-left: auto; text-align: right; padding-top: 4px; }
.method-step__text { padding: 20px clamp(14px, 1.4vw, 20px) 4px; background: var(--bg-raise); display: grid; align-content: start; gap: 10px; }
.method-step__title { font: 400 clamp(21px, 1.8vw, 27px)/1.1 var(--font-display); letter-spacing: -0.03em; }
.method-step__body { font: 400 15px/1.55 var(--font-text); color: var(--ink-2); }
.method-step__meta { font: 400 12.5px/1.5 var(--font-mono); color: var(--ink-2); display: flex; flex-wrap: wrap; gap: 4px 10px; }
.method-step__meta > span { color: var(--ink-3); font-size: 11px; padding-top: 1px; min-width: 76px; }
.method-step__meta a { color: var(--ink); text-decoration-color: var(--c); }
.method-step--purple .method-step__meta a { text-decoration-color: var(--purple-ink); }
.method-step__meta a:hover { color: var(--amber); }
.method-step__chips { display: flex; flex-wrap: wrap; gap: 6px; padding: 6px 0 16px; }

/* glyph renderings */
.method-glyph__clay { fill: var(--amber); }
.method-glyph__wire { fill: none; stroke: var(--crimson-ink); stroke-width: 1.8; stroke-linejoin: round; }
.method-glyph__wire--rough { stroke: var(--orange-ink); stroke-width: 2.2; stroke-dasharray: 5 4; }
.method-glyph__centre { fill: none; stroke: var(--ink-3); stroke-width: 0.8; stroke-dasharray: 8 3 2 3; }
.method-steel-a { stop-color: #f2d7f2; }
.method-steel-b { stop-color: var(--purple-ink); }
.method-steel-c { stop-color: var(--purple); }
.method-glyph__shine { fill: none; stroke: #fff; stroke-width: 1.4; stroke-linecap: round; opacity: 0.75; }
.method-glyph__dim { fill: none; stroke: var(--ink-3); stroke-width: 0.9; }

.js .method-ladder[data-reveal] .method-step__block { transform: scaleY(0.04); transition: transform 1s var(--ease-out); transition-delay: calc(var(--i) * 0.12s); }
.js .method-ladder[data-reveal].is-in .method-step__block { transform: none; }
@media (prefers-reduced-motion: reduce) { .js .method-ladder[data-reveal] .method-step__block { transform: none !important; transition: none !important; } }

@media (max-width: 1000px) {
  .method-ladder__steps { grid-template-columns: 1fr 1fr; row-gap: 24px; }
  .method-step__stage { height: 300px; }
}
@media (max-width: 640px) {
  .method-ladder__steps { grid-template-columns: 1fr; row-gap: 20px; }
  .method-step__stage { height: auto; flex-direction: row; justify-content: flex-start; align-items: flex-end; gap: 14px; }
  .method-glyph { width: 76px; margin: 0 0 4px; flex: none; }
  .method-step__block { height: 64px; flex: none; width: calc(40% + var(--i) * 12%); max-width: calc(100% - 90px); padding: 10px 12px; }
  .method-step__pn { display: none; }
  .method-step__num { font-size: 44px; }
  .method-step__tier { font-size: 10px; }
  .js .method-ladder[data-reveal] .method-step__block { transform: scaleX(0.04); transform-origin: left; }
}

/* ---------- 2b. the ranking ---------- */
.method-rankhead { display: grid; grid-template-columns: minmax(0, 1fr) minmax(300px, 52ch); gap: 14px clamp(32px, 4vw, 72px); align-items: end; margin: clamp(64px, 7vw, 112px) 0 28px; }
.method-rankhead__title { margin-top: 2px; }
.method-rankhead__lead { font: 400 16px/1.6 var(--font-text); color: var(--ink-2); }
@media (max-width: 900px) { .method-rankhead { grid-template-columns: 1fr; } }

.method-rank { margin: 0; --cols: minmax(150px, 250px) minmax(0, 1fr) minmax(200px, 300px); }
.method-rank__legend { list-style: none; padding: 0; margin: 0 0 18px; display: flex; flex-wrap: wrap; gap: 8px 22px; font: 400 12px/1.4 var(--font-mono); color: var(--ink-2); }
.method-rank__key { display: inline-flex; align-items: center; gap: 8px; }
.method-rank__key::before { content: ""; width: 14px; height: 10px; background: var(--k); }
.method-rank__key--es { --k: var(--orange); }
.method-rank__key--lookup { --k: var(--amber); }
.method-rank__key--neither { --k: var(--ink-3); }
.method-rank__rows { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line-2); }
.method-rank__row { --k: var(--amber); display: grid; grid-template-columns: var(--cols); gap: 6px 24px; align-items: center; padding: 9px 0; border-bottom: 1px solid var(--line); }
.method-rank__row--es { --k: var(--orange); }
.method-rank__row--neither { --k: var(--ink-3); }
.method-rank__label { font: 400 15px/1.25 var(--font-text); color: var(--ink); }
.method-rank__label small { display: block; font: 400 11.5px/1.4 var(--font-mono); color: var(--ink-3); margin-top: 3px; }
.method-rank__track { position: relative; height: 26px; background-image: linear-gradient(to right, var(--line) 1px, transparent 1px); background-size: calc(100% / 6) 100%; }
.method-rank__track i { position: absolute; left: 0; top: 6px; height: 14px; width: max(2px, var(--w)); background: var(--k); transform-origin: left; }
.method-rank__row--neither .method-rank__track i { background: color-mix(in srgb, var(--ink-3) 80%, transparent); }
.method-rank__track b { position: absolute; left: calc(max(2px, var(--w)) + 8px); top: 50%; transform: translateY(-50%); font: 500 13px/1 var(--font-mono); color: var(--ink); white-space: nowrap; }
.method-rank__row.is-top .method-rank__label { font-weight: 700; }
.method-rank__row.is-top .method-rank__track b { color: var(--k); font-size: 15px; }
.method-rank__next { font: 400 12.5px/1.45 var(--font-mono); color: var(--ink-2); }
.method-rank__next a { color: var(--ink); text-decoration-color: var(--k); }
.method-rank__next a:hover { color: var(--amber); }
.method-rank__next .chip { padding-block: 3px; }
.method-rank__arrow { color: var(--k); margin-right: 6px; }
.method-rank__axis { display: grid; grid-template-columns: var(--cols); gap: 0 24px; }
.method-rank__ticks { position: relative; height: 22px; }
.method-rank__ticks i { position: absolute; left: var(--x); top: 6px; transform: translateX(-50%); font: 400 11.5px/1 var(--font-mono); font-style: normal; color: var(--ink-3); }
.method-rank__axt { display: grid; grid-template-columns: var(--cols); gap: 0 24px; font: 400 11.5px/1.4 var(--font-mono); color: var(--ink-3); margin-top: 6px; }
.method-rank__axt span { grid-column: 2; text-align: center; }
.js .method-rank[data-reveal] .method-rank__track i { transform: scaleX(0); transition: transform 0.9s var(--ease-out); }
.js .method-rank[data-reveal].is-in .method-rank__track i { transform: none; }
@media (prefers-reduced-motion: reduce) { .js .method-rank[data-reveal] .method-rank__track i { transform: none !important; transition: none !important; } }
@media (max-width: 860px) {
  .method-rank { --cols: 1fr; }
  .method-rank__row { gap: 4px; padding: 12px 0; }
  .method-rank__track { margin-right: 52px; }
  .method-rank__next:empty { display: none; }
  .method-rank__axis > span:not(.method-rank__ticks), .method-rank__axt::before { display: none; }
  .method-rank__ticks { margin-right: 52px; }
  .method-rank__axt span { grid-column: 1; text-align: left; }
}

/* ---------- 3. the chain: map ---------- */
.method-map { margin: 0 0 3px; }
.method-map__stage { position: relative; aspect-ratio: 1200 / 470; }
.method-map__svg { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.method-ruler { stroke-width: 3; }
.method-ruler--amber { stroke: var(--amber); }
.method-ruler--orange { stroke: var(--orange); }
.method-ruler--crimson { stroke: var(--crimson); }
.method-ruler--purple { stroke: var(--purple-ink); }
.method-edge { fill: none; stroke: var(--line-2); stroke-width: 1.6; transition: stroke 0.25s; }
.method-edge--fb { stroke: color-mix(in srgb, var(--amber) 55%, transparent); stroke-dasharray: 6 5; }
.method-edge.is-on { stroke: var(--amber); stroke-width: 2.2; }
.method-ah { fill: var(--ink-3); }
.method-ah--on { fill: var(--amber); }
.method-ah--fb { fill: color-mix(in srgb, var(--amber) 70%, transparent); }
.method-map__pass { position: absolute; top: 6.38%; transform: translate(-50%, -50%); font: 500 11px/1 var(--font-mono); letter-spacing: 0.04em; color: var(--ink-2); background: var(--bg-deep); padding: 0 8px; white-space: nowrap; }
.method-map__input { position: absolute; transform: translate(-50%, -50%); width: 12.5%; height: 11.06%; display: grid; place-content: center; text-align: center; gap: 3px; font: 500 10px/1 var(--font-mono); letter-spacing: 0.04em; color: var(--ink-3); border: 1px dashed var(--line-2); border-radius: 3px; }
.method-map__input b { font: 400 clamp(12px, 1.05vw, 14px)/1.15 var(--font-text); letter-spacing: 0; color: var(--ink-2); }
.method-map__rail { position: absolute; left: 55.2%; top: 82.4%; transform: translate(-50%, -100%); font: 500 10.5px/1 var(--font-mono); letter-spacing: 0.04em; color: var(--amber); background: var(--bg-deep); padding: 0 8px; white-space: nowrap; }

.method-node { --c: var(--amber); position: absolute; transform: translate(-50%, -50%); width: 12.5%; height: 25.53%; display: flex; flex-direction: column; justify-content: space-between; gap: 6px; padding: clamp(8px, 0.9vw, 12px); background: var(--bg-raise); border-top: 3px solid var(--c); border-radius: 0 0 3px 3px; text-decoration: none; color: var(--ink); transition: background 0.2s, box-shadow 0.2s, transform 0.2s var(--ease); }
.method-node--orange { --c: var(--orange); }
.method-node--crimson { --c: var(--crimson); }
.method-node--purple { --c: var(--purple-ink); }
.method-node--fb { height: 17.02%; border-top-style: dashed; justify-content: center; }
.method-node__k { font: 500 10.5px/1 var(--font-mono); letter-spacing: 0.04em; color: var(--c); }
.method-node--fb .method-node__k { color: var(--amber); }
.method-node__name { font: 400 clamp(14px, 1.3vw, 18px)/1.12 var(--font-display); letter-spacing: -0.02em; }
.method-node__tier { font: 400 clamp(9px, 0.78vw, 10.5px)/1.2 var(--font-mono); color: var(--ink-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.method-node__tier .method-pips { grid-template-columns: repeat(4, 5px); margin-right: 6px; }
.method-node__tier .method-pips i { height: 5px; }
.method-node:hover { background: var(--bg-raise-2); }
.method-node.is-active { background: var(--bg-raise-2); box-shadow: 0 0 0 1px var(--c), 0 14px 40px rgba(0, 0, 0, 0.45); }
.method-node--fb.is-active { box-shadow: 0 0 0 1px var(--amber), 0 14px 40px rgba(0, 0, 0, 0.45); }
.method-node.is-linked { box-shadow: 0 0 0 1px color-mix(in srgb, var(--amber) 55%, transparent); }
@media (max-width: 999px) { .method-map { display: none; } }

/* ---------- 3b. the chain: cards ---------- */
.method-cards { display: grid; gap: 3px; }
.method-card { --c: var(--amber); display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.6fr); grid-template-areas: "head io" "links io"; gap: 14px clamp(24px, 4vw, 64px); padding: clamp(18px, 2.2vw, 30px); background: var(--bg-raise); border-left: 3px solid var(--c); border-radius: 0 3px 3px 0; position: relative; }
.method-card--orange { --c: var(--orange); }
.method-card--crimson { --c: var(--crimson); }
.method-card--purple { --c: var(--purple-ink); }
.method-card--fb { --c: var(--amber); border-left-style: dashed; }
.method-card__head { grid-area: head; display: grid; align-content: start; gap: 10px; }
.method-card__k { font: 500 11px/1.4 var(--font-mono); letter-spacing: 0.04em; color: var(--c); }
.method-card__name { font: 400 clamp(26px, 2.6vw, 40px)/1.02 var(--font-display); letter-spacing: -0.035em; }
.method-card__tier { font: 400 12px/1.4 var(--font-mono); color: var(--ink-3); display: flex; align-items: center; }
.method-card__io { grid-area: io; margin: 0; display: grid; gap: 14px; align-content: start; }
.method-card__io > div { display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 12px; padding-top: 12px; border-top: 1px solid var(--line); }
.method-card__io > div:first-child { border-top: 0; padding-top: 0; }
.method-card__io dt { font: 500 11px/1.6 var(--font-mono); letter-spacing: 0.04em; color: var(--c); }
.method-card__io dd { margin: 0; font: 400 16px/1.55 var(--font-text); color: var(--ink-2); }
.method-card__io > div:nth-child(2) dd { color: var(--ink); }
.method-card__links { grid-area: links; align-self: end; display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.method-card__go { padding: 12px 16px; font-size: 13px; }
.method-card__go:hover { border-color: var(--c); }

/* map mode (JS, wide screens): one card at a time under the map */
.method-chain.is-map .method-card:not(.is-active) { display: none; }
.method-chain.is-map .method-card { animation: method-in 0.35s var(--ease-out); }
@keyframes method-in { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .method-chain.is-map .method-card { animation: none; } }

/* list mode (narrow screens or no JS): a vertical chain */
.method-chain:not(.is-map) .method-card + .method-card { margin-top: 26px; }
.method-chain:not(.is-map) .method-card + .method-card::before { content: "↓"; position: absolute; left: -3px; top: -24px; width: 3px; display: grid; place-items: center; font: 400 15px/1 var(--font-mono); color: var(--ink-3); }
.method-chain:not(.is-map) .method-card--fb::before { content: "↺" !important; color: var(--amber) !important; }
@media (max-width: 860px) {
  .method-card { grid-template-columns: 1fr; grid-template-areas: "head" "io" "links"; }
  .method-card__io > div { grid-template-columns: 1fr; gap: 4px; }
  .method-card__io dd { font-size: 15px; }
}

/* ---------- 4. team: the delivery flow ---------- */
.method-flow { margin: 0; }
.method-flow__steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 3px; }
.method-flow__step { --c: var(--amber); position: relative; display: grid; align-content: start; gap: 10px; padding: 18px clamp(14px, 1.4vw, 20px) 22px; background: var(--bg-raise); border-top: 4px solid var(--c); }
.method-flow__step--orange { --c: var(--orange); }
.method-flow__step--crimson { --c: var(--crimson); }
.method-flow__step--purple { --c: var(--purple-ink); }
.method-flow__step--ink { --c: var(--ink); }
.method-flow__n { font: 500 11px/1 var(--font-mono); letter-spacing: 0.04em; color: var(--c); }
.method-flow__step b { font: 400 clamp(20px, 1.7vw, 25px)/1.1 var(--font-display); letter-spacing: -0.03em; }
.method-flow__step p { font: 400 14.5px/1.55 var(--font-text); color: var(--ink-2); }
.method-flow__step a { color: var(--ink); text-decoration-color: var(--amber); }
.method-flow__step:not(:last-child)::after { content: "→"; position: absolute; right: -11px; top: 14px; z-index: 1; width: 19px; height: 19px; display: grid; place-items: center; font: 400 13px/1 var(--font-mono); color: var(--ink); background: var(--bg); border: 1px solid var(--line-2); border-radius: 50%; }
.method-flow__back { position: relative; margin: 0 0 0 30%; width: 40%; height: 30px; border: 1px dashed color-mix(in srgb, var(--amber) 70%, transparent); border-top: 0; }
.method-flow__back::before { content: ""; position: absolute; left: -5px; top: -2px; border: 5px solid transparent; border-bottom: 7px solid var(--amber); border-top: 0; }
.method-flow__back span { position: absolute; left: 50%; top: 100%; transform: translate(-50%, -50%); font: 500 11px/1 var(--font-mono); letter-spacing: 0.03em; color: var(--amber); background: var(--bg); padding: 0 10px; white-space: nowrap; }
.method-flow .method-cap { margin-top: 26px; }
@media (max-width: 1000px) {
  .method-flow__steps { grid-template-columns: 1fr; }
  .method-flow__step { grid-template-columns: 120px minmax(0, 1fr); grid-template-areas: "n b" "n p"; gap: 4px 16px; border-top: 0; border-left: 4px solid var(--c); }
  .method-flow__n { grid-area: n; padding-top: 6px; }
  .method-flow__step:not(:last-child)::after { content: "↓"; right: auto; left: 20px; top: auto; bottom: -11px; }
  .method-flow__back { margin: 16px 0 0; width: auto; height: auto; border: 0; }
  .method-flow__back::before { display: none; }
  .method-flow__back span { position: static; transform: none; padding: 0; white-space: normal; }
  .method-flow__back span::before { content: "↺ "; }
}
@media (max-width: 520px) {
  .method-flow__step { grid-template-columns: 1fr; grid-template-areas: "n" "b" "p"; }
}

/* ---------- 4b. corrections ---------- */
.method-fixes__title { margin: clamp(56px, 6vw, 96px) 0 24px; }
.method-fixes { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 3px; }
.method-fix { --c: var(--amber); display: grid; grid-template-rows: auto auto auto 1fr auto auto; gap: 12px; padding: 22px clamp(16px, 1.6vw, 24px) 20px; background: var(--bg-raise); border-top: 4px solid var(--c); min-width: 0; }
.method-fix--orange { --c: var(--orange); }
.method-fix--crimson { --c: var(--crimson); }
.method-fix__k { font: 500 11px/1.45 var(--font-mono); letter-spacing: 0.03em; color: var(--c); }
.method-fix--crimson .method-fix__k { color: var(--crimson-ink); }
.method-fix--purple { --c: var(--purple-ink); }
.method-fix--wide { grid-column: 1 / -1; grid-template-rows: none; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 16px clamp(24px, 4vw, 64px); }
.method-fix__text, .method-fix__fig { display: grid; gap: 12px; align-content: start; min-width: 0; }
.method-fix__fig { align-self: end; }
.method-fix--wide .method-mini { max-width: 440px; }
.method-fix__p a { color: var(--ink); text-decoration-color: var(--purple-ink); }
.method-fix__h { font: 400 clamp(22px, 2vw, 28px)/1.08 var(--font-display); letter-spacing: -0.03em; }
.method-fix__p { font: 400 15px/1.55 var(--font-text); color: var(--ink-2); }
.method-fix__note { font: 400 12px/1.5 var(--font-mono); color: var(--ink-3); }
.method-fix .chips { margin-top: 2px; }
.method-mini { width: 100%; height: auto; align-self: end; margin-top: 4px; overflow: visible; }
.method-mini__l { font: 500 10.5px var(--font-mono); fill: var(--ink-2); letter-spacing: 0.02em; }
.method-mini__v { font: 500 12px var(--font-mono); fill: var(--ink); }
.method-mini__t { font: 400 10.5px var(--font-mono); fill: var(--ink-3); }
.method-mini__axis { stroke: var(--line-2); stroke-width: 1; }
.method-mini__bar--old { fill: var(--ink-3); }
.method-mini__bar--new { fill: var(--amber); }
.method-mini__bar--ref { fill: none; stroke: var(--amber); stroke-width: 1.2; stroke-dasharray: 3 2; }
.method-mini__bar--new4 { fill: var(--purple-ink); }
.method-mini__box { stroke: var(--purple-ink); stroke-width: 1.2; stroke-dasharray: 3 3; }
.method-mini__span { stroke: var(--orange); stroke-width: 2; }
.method-mini__span--soft { stroke: var(--crimson-ink); }
.method-mini__dot--f { fill: var(--bg-raise); stroke: var(--orange-ink); stroke-width: 2; }
.method-mini__dot--e { fill: var(--orange); }
.method-fix--crimson .method-mini__dot--e { fill: var(--crimson-ink); }
.method-mini__dot--p { fill: var(--bg-raise); stroke: var(--crimson-ink); stroke-width: 2; }
@media (max-width: 1080px) { .method-fixes { grid-template-columns: 1fr 1fr; } }
@media (max-width: 720px) { .method-fixes { grid-template-columns: 1fr; } .method-fix--wide { grid-template-columns: minmax(0, 1fr); } }

/* ---------- 5. tools ---------- */
.method-tools__fig { margin: 0; }
.method-matrix { width: 100%; border-collapse: collapse; }
.method-matrix th, .method-matrix td { padding: 0; }
.method-matrix thead th { font: 500 11px/1.2 var(--font-mono); letter-spacing: 0.04em; color: var(--ink-3); text-align: left; padding-bottom: 12px; border-bottom: 1px solid var(--line-2); }
.method-matrix__c { width: 7%; text-align: center !important; }
.method-matrix tbody th { text-align: left; padding: 20px 24px 20px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.method-matrix tbody th b { display: block; font: 400 clamp(26px, 2.6vw, 40px)/1 var(--font-display); letter-spacing: -0.035em; color: var(--ink); }
.method-matrix tbody th span { display: block; font: 400 15px/1.55 var(--font-text); color: var(--ink-2); margin-top: 10px; max-width: 60ch; }
.method-matrix tbody td { border-bottom: 1px solid var(--line); vertical-align: middle; }
.method-matrix__row { --c: var(--amber); }
.method-matrix__row--orange { --c: var(--orange); }
.method-matrix__row--crimson { --c: var(--crimson-ink); }
.method-matrix__dot { display: inline-block; width: 14px; height: 14px; border-radius: 50%; background: var(--c); vertical-align: middle; }
.method-matrix__none { display: inline-block; width: 8px; height: 1px; background: var(--ink-3); vertical-align: middle; opacity: 0.6; }
@media (max-width: 860px) {
  .method-matrix thead th:first-child { font-size: 0; }
  .method-matrix, .method-matrix tbody, .method-matrix tr { display: block; }
  .method-matrix thead { display: none; }
  .method-matrix tbody tr { display: grid; grid-template-columns: repeat(8, minmax(0, 1fr)); border-bottom: 1px solid var(--line); padding-bottom: 14px; }
  .method-matrix tbody th { grid-column: 1 / -1; border: 0; padding: 18px 0 12px; }
  .method-matrix tbody td { border: 0; display: grid; justify-items: center; gap: 6px; }
  .method-matrix tbody td::before { font: 500 10px/1 var(--font-mono); color: var(--ink-3); }
  .method-matrix tbody td:nth-of-type(1)::before { content: "01"; }
  .method-matrix tbody td:nth-of-type(2)::before { content: "02"; }
  .method-matrix tbody td:nth-of-type(3)::before { content: "03"; }
  .method-matrix tbody td:nth-of-type(4)::before { content: "04"; }
  .method-matrix tbody td:nth-of-type(5)::before { content: "05"; }
  .method-matrix tbody td:nth-of-type(6)::before { content: "06"; }
  .method-matrix tbody td:nth-of-type(7)::before { content: "LL"; }
  .method-matrix tbody td:nth-of-type(8)::before { content: "SL"; }
  .method-matrix__none { margin-top: 6px; }
}

/* ---------- 6. the detail ---------- */
.method-eqs { display: grid; gap: 3px; margin-bottom: clamp(40px, 5vw, 72px); }
.method-eq { display: grid; grid-template-columns: minmax(180px, 0.6fr) minmax(0, 1.4fr); grid-template-areas: "k f" "k w"; gap: 12px clamp(24px, 4vw, 64px); padding: 22px clamp(16px, 2vw, 28px); background: var(--bg-raise); border-left: 3px solid var(--crimson); }
.method-eq__k { grid-area: k; font: 500 12px/1.5 var(--font-mono); letter-spacing: 0.03em; color: var(--crimson-ink); text-transform: uppercase; }
.method-eq__f { grid-area: f; font: 400 clamp(17px, 1.6vw, 22px)/1.6 Georgia, "Times New Roman", serif; color: var(--ink); overflow-wrap: anywhere; }
.method-eq__f sub, .method-eq__f sup { font-size: 0.68em; }
.method-eq__w { grid-area: w; font: 400 14.5px/1.6 var(--font-text); color: var(--ink-2); max-width: 78ch; }
.method-eq__w i, .method-eq__f i { font-family: Georgia, "Times New Roman", serif; }
@media (max-width: 860px) { .method-eq { grid-template-columns: 1fr; grid-template-areas: "k" "f" "w"; } }
.method-detail__h { margin-top: clamp(32px, 4vw, 56px); }
.method-detail .table-wrap td.method-num { font-family: var(--font-mono); font-size: 13px; color: var(--ink); white-space: nowrap; }
.method-detail .table-wrap td:first-child { min-width: 120px; }
.method-detail .table-wrap code { color: var(--amber-ink); }
.method-detail .table-wrap a { text-decoration-color: var(--amber); }
.method-acc { font: 500 10px/1 var(--font-mono); color: var(--amber); border: 1px solid color-mix(in srgb, var(--amber) 50%, transparent); border-radius: 3px; padding: 2px 4px; margin-left: 6px; text-transform: uppercase; letter-spacing: 0.04em; vertical-align: 0.1em; }
.method-conv { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 420px); gap: clamp(24px, 4vw, 64px); align-items: start; }
.method-conv .table-wrap { margin-bottom: 0; }
.method-convfig { margin: clamp(32px, 4vw, 56px) 0 0; padding-top: 32px; }
.method-convfig__svg { width: 100%; height: auto; overflow: visible; }
.method-grid { stroke: var(--line); stroke-width: 1; }
.method-convline { fill: none; stroke-width: 2; }
.method-convline--ni { stroke: var(--amber); }
.method-convline--pd { stroke: var(--crimson-ink); }
.method-convdot--ni { fill: var(--amber); }
.method-convdot--pd { fill: var(--crimson-ink); }
.method-convdot.is-acc { stroke: var(--bg-deep); stroke-width: 2; }
.method-convlab { font: 500 11.5px var(--font-mono); }
.method-convlab--ni { fill: var(--amber); }
.method-convlab--pd { fill: var(--crimson-ink); }
@media (max-width: 900px) { .method-conv { grid-template-columns: minmax(0, 1fr); } .method-convfig { margin-top: 8px; padding-top: 0; } }

/* ---------- 7. next ---------- */
.method-next__grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(300px, 46ch); gap: 20px clamp(32px, 4vw, 72px); align-items: end; }
.method-next__body p { font: 400 clamp(18px, 1.5vw, 21px)/1.5 var(--font-text); color: var(--ink-2); }
.method-pager { display: grid; grid-template-columns: 1fr 1fr; gap: 3px; margin-top: clamp(40px, 5vw, 72px); }
.method-pager__link { display: grid; gap: 10px; align-content: start; padding: 24px clamp(18px, 2vw, 28px) 26px; background: var(--bg-raise); text-decoration: none; border-top: 3px solid var(--line-2); transition: border-color 0.25s, background 0.25s; }
.method-pager__link--next { border-top-color: var(--orange); text-align: right; }
.method-pager__link:hover { background: var(--bg-raise-2); border-top-color: var(--amber); }
.method-pager__k { font: 500 11.5px/1 var(--font-mono); letter-spacing: 0.04em; color: var(--ink-3); }
.method-pager__link--next .method-pager__k { color: var(--orange-ink); }
.method-pager__t { font: 400 clamp(24px, 2.6vw, 40px)/1.05 var(--font-display); letter-spacing: -0.035em; color: var(--ink); }
.method-pager__n { font: 400 13px/1.5 var(--font-mono); color: var(--ink-3); }
@media (max-width: 860px) {
  .method-next__grid { grid-template-columns: 1fr; }
  .method-pager { grid-template-columns: 1fr; }
  .method-pager__link--next { order: -1; text-align: left; }
}