/* =====================================================================
   /field/ : Model 1, protons and the field
   Colour meaning on this page:
   amber      = the field treated the same in both terms (stable), the thing to look at
   crimson    = the factor on the coupling only, the instability, the left-out piece
   orange     = the coupling (p.A) pieces
   purple-ink = the A^2 corner and the materials
   ===================================================================== */

/* ---------- hero ---------- */
.field-hero { position: relative; padding-top: clamp(20px, 3vw, 40px); }
.field-hero__top { position: relative; z-index: 2; }
.field-hero__title { margin-top: clamp(8px, 1.4vw, 18px); max-width: 9.5em; text-shadow: 0 2px 40px rgba(0, 0, 0, 0.4); }
.field-hero__media { position: relative; z-index: 1; margin: calc(var(--fs-display-1) * -0.9) 0 0; height: clamp(320px, 66vh, 760px); }
.field-hero__media img { object-position: 60% 62%; }
.field-hero__media::before,
.field-hero__media::after { content: ""; position: absolute; left: 0; right: 0; pointer-events: none; z-index: 1; }
.field-hero__media::before { top: 0; height: 40%; background: linear-gradient(180deg, var(--bg) 0%, rgba(25, 25, 25, 0.75) 32%, rgba(25, 25, 25, 0) 100%); }
.field-hero__media::after { bottom: 0; height: 50%; background: linear-gradient(0deg, var(--bg) 0%, rgba(25, 25, 25, 0.72) 42%, rgba(25, 25, 25, 0) 100%); }
.field-hero__media .illus-tag { left: auto; right: var(--gutter); bottom: auto; top: 46%; }
.field-hero--noimg .field-hero__body { margin-top: 40px; }
.field-hero__body { position: relative; z-index: 2; margin-top: clamp(-220px, -13vw, -64px); padding-bottom: clamp(8px, 2vw, 24px); }
.field-hero__body::before { content: ""; position: absolute; z-index: -1; left: 0; top: -70px; width: min(820px, 100%); height: 320px; background: radial-gradient(80% 70% at 30% 50%, rgba(18, 18, 18, 0.8), rgba(18, 18, 18, 0) 75%); pointer-events: none; }
.field-hero__lead { max-width: 44ch; color: var(--ink-2); text-wrap: pretty; }
.field-hero__lead strong { display: block; margin-top: 0.55em; color: var(--ink); }
.field-onpage { display: flex; flex-wrap: wrap; gap: 6px 22px; margin-top: clamp(28px, 3.4vw, 44px); }
.field-onpage a { font: 400 12.5px/1 var(--font-mono); color: var(--ink-2); text-decoration: none; padding: 8px 0; }
.field-onpage a:hover { color: var(--amber); }

/* ---------- shared heads ---------- */
.page-field .section { padding-block: clamp(56px, 7vw, 120px); }
.field-head { max-width: 1100px; margin-bottom: clamp(32px, 4vw, 60px); }
.field-head__h { text-wrap: balance; }
.field-head .lead { margin-top: clamp(16px, 2vw, 28px); max-width: 60ch; }
.field-split { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 24px clamp(32px, 5vw, 96px); align-items: end; margin-bottom: clamp(32px, 4vw, 60px); }
.field-split .field-head { margin-bottom: 0; }
.field-split__side.lead { max-width: 52ch; }
.field-split__side.prose { font-size: 17px; }
.field-split__side.prose a { white-space: nowrap; }

/* ---------- in short ---------- */
.field-short__grid { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); gap: 24px clamp(32px, 5vw, 96px); margin-bottom: clamp(36px, 4.4vw, 64px); }
.field-short__h { max-width: 11em; text-wrap: balance; }
.field-short__list { counter-reset: s; display: grid; gap: 0; border-top: 1px solid var(--line-2); }
.field-short__list li { counter-increment: s; position: relative; padding: 16px 0 16px 48px; border-bottom: 1px solid var(--line); font: 400 clamp(17px, 1.3vw, 19px)/1.55 var(--font-text); color: var(--ink-2); text-wrap: pretty; }
.field-short__list li::before { content: "[" counter(s, decimal-leading-zero) "]"; position: absolute; left: 0; top: 19px; font: 500 12px/1 var(--font-mono); color: var(--amber); }
.field-short__list li:nth-child(3) { color: var(--ink); }
.field-short .statbar__label { font-size: clamp(17px, 1.8vw, 28px); line-height: 1.08; }
.field-short__chips { margin-top: 22px; }

/* ---------- 02.1 the idea ---------- */
.field-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 clamp(20px, 3vw, 48px); }
.field-step { border-top: 1px solid var(--line-2); padding-top: 22px; }
.field-step__glyph { width: 132px; height: auto; margin-bottom: 18px; overflow: visible; }
.field-step__n { font: 500 12px/1 var(--font-mono); color: var(--amber); letter-spacing: 0.03em; }
.field-step__h { font: 400 clamp(24px, 2.2vw, 32px)/1.08 var(--font-display); letter-spacing: -0.03em; margin-top: 12px; text-wrap: balance; }
.field-step__p { font: 400 16.5px/1.6 var(--font-text); color: var(--ink-2); margin-top: 12px; text-wrap: pretty; }
.field-g-wall { fill: #4a4a4a; }
.field-g-spring { fill: none; stroke: var(--ink-3); stroke-width: 2; stroke-linejoin: round; }
.field-g-ion { fill: var(--amber); stroke: var(--bg-raise); stroke-width: 2; }
.field-g-plus { font: 700 13px var(--font-mono); fill: #121212; }
.field-g-arrow { fill: none; stroke: var(--amber); stroke-width: 1.6; }
.field-g-wave { fill: none; stroke: var(--orange-ink); stroke-width: 1.8; opacity: 0.9; }
.field-g-axis { fill: none; stroke: var(--line-2); stroke-width: 1.4; }
.field-g-curve { fill: none; stroke: var(--amber); stroke-width: 2.2; }
.field-g-curve--b { stroke: var(--crimson-ink); stroke-dasharray: 5 4; }
.field-g-dot { fill: var(--crimson-ink); }

/* ---------- 02.2 the two terms (square diagram) ---------- */
.field-sq { display: grid; grid-template-columns: repeat(2, minmax(0, 440px)) minmax(0, 1fr); gap: 28px clamp(24px, 3.4vw, 56px); align-items: start; }
.field-sq__panel { margin: 0; border-top: 1px solid var(--line-2); padding-top: 16px; }
.field-sq__k { font: 500 12px/1.3 var(--font-mono); letter-spacing: 0.03em; color: var(--amber); }
.field-sq__panel--cut .field-sq__k { color: var(--crimson-ink); }
.field-sq svg { width: 100%; height: auto; margin-top: 8px; }
.field-sq__brk { fill: none; stroke: var(--ink-3); stroke-width: 1.2; }
.field-sq__side { font: 400 12px var(--font-mono); fill: var(--ink-3); letter-spacing: 0.02em; }
.field-sq__side--f { fill: var(--purple-ink); }
.field-sq__t--p { fill: #2c2c2c; stroke: rgba(255, 255, 255, 0.18); stroke-width: 1; }
.field-sq__t--x { fill: color-mix(in srgb, var(--orange) 34%, var(--bg)); stroke: var(--orange); stroke-width: 1.4; }
.field-sq__t--a { fill: color-mix(in srgb, var(--purple) 70%, var(--bg)); stroke: var(--purple-ink); stroke-width: 1.4; }
.field-sq__t--miss { fill: rgba(217, 22, 86, 0.08); stroke: var(--crimson-ink); stroke-width: 1.6; stroke-dasharray: 6 5; }
.field-sq__lab { font: 400 17px var(--font-display); fill: var(--ink); letter-spacing: -0.01em; }
.field-sq__lab--miss { fill: var(--crimson-ink); }
.field-sq__tiny { font: 500 11px var(--font-mono); fill: var(--ink); }
.field-sq__k--ink { color: var(--ink-2); }
.field-sq__key { border-top: 1px solid var(--line-2); padding-top: 16px; }
.field-key { display: grid; gap: 0; margin-top: 14px; }
.field-key li { display: grid; grid-template-columns: 18px minmax(0, 1fr); gap: 12px; padding: 11px 0; border-bottom: 1px solid var(--line); font: 400 14.5px/1.5 var(--font-text); color: var(--ink-2); }
.field-key b { color: var(--ink); font-weight: 700; }
.field-key__sw { width: 18px; height: 18px; border-radius: 3px; margin-top: 2px; }
.field-key__sw--p { background: #2c2c2c; border: 1px solid rgba(255, 255, 255, 0.18); }
.field-key__sw--x { background: color-mix(in srgb, var(--orange) 34%, var(--bg)); border: 1.4px solid var(--orange); }
.field-key__sw--a { background: color-mix(in srgb, var(--purple) 70%, var(--bg)); border: 1.4px solid var(--purple-ink); }
.field-key__sw--m { background: rgba(217, 22, 86, 0.08); border: 1.6px dashed var(--crimson-ink); }
.field-key__s { font: 400 12.5px/1.6 var(--font-mono); color: var(--ink-3); margin-top: 14px; }
.field-key__s i { font: italic 15px "Times New Roman", "Liberation Serif", serif; color: var(--ink-2); }
.field-sq__sub { font: 400 11.5px var(--font-mono); fill: var(--ink-2); }
.field-sq__sub--miss { fill: var(--crimson-ink); }
.field-sq__cap { font: 400 15px/1.55 var(--font-text); color: var(--ink-2); margin-top: 6px; max-width: 46ch; }
.field-sq__cap b { color: var(--ink); font-weight: 700; }

/* ---------- 02.3 result: figure frame ---------- */
.field-fig { border: 1px solid var(--line); border-radius: 10px; background: var(--bg); overflow: hidden; }
.field-fig__bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 11px 16px; border-bottom: 1px solid var(--line); font: 500 11.5px/1.3 var(--font-mono); letter-spacing: 0.03em; color: var(--ink-3); text-transform: uppercase; }
.field-fig__tag { color: var(--amber); }
.field-fig__name { color: var(--ink-2); text-align: right; }
.field-fig__controls { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px 32px; padding: 14px 16px; border-bottom: 1px solid var(--line); }
.field-seg { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.field-seg__k, .field-slider__k { font: 500 11px/1 var(--font-mono); letter-spacing: 0.04em; text-transform: uppercase; color: var(--ink-3); margin-right: 6px; }
.field-seg__b { font: 500 12px/1 var(--font-mono); color: var(--ink-2); padding: 9px 11px; border: 1px solid var(--line-2); border-radius: 3px; transition: color 0.2s, border-color 0.2s, background 0.2s; }
.field-seg__b:hover { color: var(--ink); border-color: var(--ink-3); }
.field-seg__b[aria-pressed="true"] { color: var(--on-amber); background: var(--amber); border-color: var(--amber); }
.field-slider { display: flex; align-items: center; gap: 12px; flex: 1 1 320px; max-width: 520px; }
.field-slider input { flex: 1; min-width: 0; accent-color: var(--amber); height: 28px; cursor: pointer; }
.field-nocase { text-transform: none; font-size: 1.15em; }
.field-slider__v { font: 500 15px/1 var(--font-mono); color: var(--ink); min-width: 4.4em; text-align: right; font-variant-numeric: tabular-nums; }
.no-js .field-fig__controls { display: none; }

.field-fig__body { display: grid; grid-template-columns: minmax(0, 1fr) 300px; }
.field-fig__plot { position: relative; min-height: 300px; padding: 10px 6px 0 0; touch-action: pan-y; }
.field-fig__plot svg { display: block; width: 100%; height: auto; overflow: visible; }
.field-fig__nojs { padding: 40px 24px; font: 400 14px/1.6 var(--font-mono); color: var(--ink-2); }
.js .field-fig__nojs { display: none; }
.field-fig__cap { padding: 13px 16px 15px; border-top: 1px solid var(--line); font: 400 12.5px/1.65 var(--font-mono); color: var(--ink-3); }
.field-fig__cap b { color: var(--ink-2); font-weight: 500; }
.field-fig__cap code { color: var(--ink-2); }

/* readout */
.field-readout { border-left: 1px solid var(--line); padding: 18px 18px 18px; display: flex; flex-direction: column; gap: 14px; background: var(--bg-deep); }
.no-js .field-readout { display: none; }
.field-readout__eps { font: 500 12px/1.3 var(--font-mono); color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.04em; }
.field-readout__eps b { font: 400 34px/1 var(--font-display); color: var(--ink); letter-spacing: -0.03em; text-transform: none; display: block; margin-top: 8px; font-variant-numeric: tabular-nums; }
.field-readout__row { display: grid; grid-template-columns: 12px minmax(0, 1fr) auto; gap: 4px 10px; align-items: baseline; padding-top: 12px; border-top: 1px solid var(--line); }
.field-readout__sw { width: 12px; height: 3px; align-self: center; border-radius: 2px; }
.field-readout__row--same .field-readout__sw { background: var(--amber); }
.field-readout__row--printed .field-readout__sw { background: repeating-linear-gradient(90deg, var(--crimson-ink) 0 4px, transparent 4px 6px); }
.field-readout__k { font: 400 13px/1.35 var(--font-mono); color: var(--ink-2); grid-column: 2 / span 2; }
.field-readout__v { grid-column: 2; font: 400 34px/1 var(--font-display); letter-spacing: -0.03em; color: var(--ink); font-variant-numeric: tabular-nums; }
.field-readout__s { grid-column: 3; font: 500 11px/1 var(--font-mono); text-transform: uppercase; letter-spacing: 0.05em; padding: 5px 7px 4px; border-radius: 3px; border: 1px solid var(--line-2); color: var(--ink-2); white-space: nowrap; }
.field-readout__s.is-stable { color: var(--amber-ink); border-color: color-mix(in srgb, var(--amber) 55%, transparent); }
.field-readout__s.is-unstable { color: #fff; background: var(--crimson); border-color: var(--crimson); }
.field-readout__s.is-zero { color: var(--ink); border-color: var(--ink-3); }
.field-readout__u { font: 400 11.5px/1.55 var(--font-mono); color: var(--ink-3); margin-top: auto; }

/* chart marks (drawn by field.js, sizes in px) */
.fc-grid { stroke: var(--line); stroke-width: 1; }
.fc-zero { stroke: var(--ink-3); stroke-width: 1.2; }
.fc-tick { font: 400 11.5px var(--font-mono); fill: var(--ink-3); font-variant-numeric: tabular-nums; }
.fc-axis { font: 500 11.5px var(--font-mono); fill: var(--ink-2); letter-spacing: 0.02em; }
.fc-unstable { fill: rgba(217, 22, 86, 0.07); }
.fc-zone { font: 500 10.5px var(--font-mono); letter-spacing: 0.06em; }
.fc-zone--up { fill: var(--amber-ink); }
.fc-zone--down { fill: var(--crimson-ink); }
.fc-band { fill: rgba(213, 139, 224, 0.11); }
.fc-band-edge { stroke: rgba(213, 139, 224, 0.4); stroke-width: 1; stroke-dasharray: 2 3; }
.fc-band-lab { font: 500 10.5px var(--font-mono); fill: var(--purple-ink); letter-spacing: 0.04em; }
.fc-mat { stroke: var(--purple-ink); stroke-width: 1.2; stroke-dasharray: 3 3; }
.fc-mat-lab { font: 500 11.5px var(--font-mono); fill: var(--ink); }
.fc-line { fill: none; stroke-width: 2.5; stroke-linejoin: round; stroke-linecap: round; }
.fc-line--same { stroke: var(--amber); }
.fc-line--printed { stroke: var(--crimson-ink); stroke-dasharray: 7 5; stroke-width: 2.2; }
.fc-dot { stroke: var(--bg); stroke-width: 2; }
.fc-dot--same { fill: var(--amber); }
.fc-dot--printed { fill: var(--crimson-ink); }
.fc-crit { fill: var(--bg); stroke: var(--crimson-ink); stroke-width: 2; }
.fc-crit-lab { font: 500 11.5px var(--font-mono); fill: var(--crimson-ink); }
.fc-lab { font: 500 12px var(--font-mono); fill: var(--ink); }
.fc-cursor { stroke: var(--ink); stroke-width: 1; opacity: 0.55; }
.fc-cur { stroke: var(--bg); stroke-width: 2.5; }
.fc-cur--same { fill: var(--amber); }
.fc-cur--printed { fill: var(--crimson-ink); }
.fc-hit { fill: transparent; cursor: crosshair; }

/* materials */
.field-mats { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.6fr); gap: 24px clamp(28px, 4vw, 64px); margin-top: clamp(36px, 4vw, 56px); }
.field-mats__p { font: 400 15.5px/1.6 var(--font-text); color: var(--ink-2); max-width: 48ch; }
.field-mats__list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 clamp(18px, 2.4vw, 36px); }
.field-mat { border-top: 3px solid var(--purple-ink); padding-top: 14px; }
.field-mat__name { font: 500 12px/1 var(--font-mono); color: var(--purple-ink); letter-spacing: 0.04em; }
.field-mat__v { font: 400 clamp(40px, 4vw, 60px)/0.95 var(--font-display); letter-spacing: var(--track-display); margin-top: 12px; }
.field-mat__v span { font-size: 0.4em; letter-spacing: -0.01em; color: var(--ink-2); margin-left: 0.1em; }
.field-mat__p { font: 400 14.5px/1.55 var(--font-text); color: var(--ink-2); margin-top: 12px; }
.field-mat--note { border-top-color: var(--amber); align-self: stretch; }
.field-mat--note .field-mat__p { font: 400 clamp(19px, 1.6vw, 23px)/1.3 var(--font-display); letter-spacing: -0.015em; color: var(--ink); margin-top: 0; }

/* ---------- 02.4 why (paper band) ---------- */
.field-why__grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 28px clamp(32px, 5vw, 96px); align-items: end; }
.field-why__h { color: var(--paper-ink); text-wrap: balance; }
.field-why__accent { color: var(--purple); }
.field-why__body p { font: 400 clamp(17px, 1.35vw, 20px)/1.55 var(--font-text); color: var(--paper-ink-2); max-width: 50ch; }
.field-why__body p + p { margin-top: 1em; color: var(--paper-ink); }

/* ---------- 02.5 detail ---------- */
.field-dgrid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 clamp(32px, 5vw, 88px); }
.field-d__h { margin-top: 36px; color: var(--ink); }
.field-dcol > .field-d__h:first-child { margin-top: 0; }
.field-d__p { font: 400 16px/1.65 var(--font-text); color: var(--ink-2); margin-top: 12px; max-width: 64ch; }
.field-d__p i, .field-sym i, .field-eq i { font-family: "Times New Roman", "Liberation Serif", "DejaVu Serif", Georgia, serif; font-size: 1.08em; }
.field-d__p code, .field-t__p code { color: var(--amber-ink); }
.field-eq { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-top: 14px; padding: 14px 16px; border-left: 2px solid var(--amber); background: var(--bg-raise); border-radius: 0 var(--radius) var(--radius) 0; font: 400 clamp(17px, 1.4vw, 20px)/1.5 "Times New Roman", "Liberation Serif", "DejaVu Serif", Georgia, serif; color: var(--ink); overflow-x: auto; }
.field-eq > span:first-child { white-space: nowrap; }
.field-eq__n { font: 400 12px/1 var(--font-mono); color: var(--ink-3); flex: none; }
.field-eq sub, .field-eq sup { font-size: 0.68em; }
.field-sym { margin: 14px 0 0; display: grid; }
.field-sym div { display: grid; grid-template-columns: 9.5em minmax(0, 1fr); gap: 12px; padding: 9px 0; border-top: 1px solid var(--line); }
.field-sym dt { color: var(--ink); font-size: 16px; }
.field-sym dd { margin: 0; font: 400 14.5px/1.55 var(--font-text); color: var(--ink-2); }
.field-t__h { margin-top: clamp(48px, 6vw, 80px); }
.field-t__p { margin-top: 10px; }
.field-table th { text-transform: none; }
.field-table th i { font: italic 14px "Times New Roman", "Liberation Serif", serif; letter-spacing: 0; }
.field-table td { font-variant-numeric: tabular-nums; min-width: 0; }
.field-table__alt { display: block; font: 400 11.5px/1.4 var(--font-text); color: var(--ink-3); }
.field-table td:first-child { min-width: 0; font-family: var(--font-mono); font-size: 13px; }
.field-table th[scope="colgroup"] { text-align: center; color: var(--ink-2); border-bottom: 1px solid var(--line); }
.field-table td.is-neg { color: var(--crimson-ink); }
.field-table__crit td { background: rgba(217, 22, 86, 0.06); }
.field-table__src { font-size: 12.5px; min-width: 220px !important; }
.field-table td sup { font-size: 0.72em; }
.field-scope { margin-top: clamp(28px, 3vw, 44px); padding-top: 20px; border-top: 1px solid var(--line); }
.field-scope .chips { margin-top: 16px; }

/* ---------- next ---------- */
.field-next__grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 36px clamp(32px, 5vw, 96px); align-items: start; }
.field-next__h { text-wrap: balance; }
.field-next__lead { margin-top: 24px; max-width: 52ch; }
.field-back .deeper__level { color: var(--ink-3); }
.field-next .deeper { grid-template-columns: 172px minmax(0, 1fr) auto; }
@media (max-width: 560px) { .field-next .deeper { grid-template-columns: minmax(0, 1fr) auto; } .field-next .deeper__level { grid-column: 1 / -1; } .field-next .deeper__label, .field-next .deeper__note { grid-column: 1; } .field-next .deeper__arrow { grid-row: 2; grid-column: 2; } }

/* ---------- responsive ---------- */
@media (max-width: 1180px) {
  .field-sq { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .field-sq__key { grid-column: 1 / -1; }
}
@media (max-width: 1100px) {
  .field-fig__body { grid-template-columns: 1fr; }
  .field-readout { border-left: 0; border-top: 1px solid var(--line); display: grid; grid-template-columns: auto 1fr 1fr; gap: 12px 24px; align-items: start; }
  .field-readout__row { border-top: 0; padding-top: 0; }
  .field-readout__u { grid-column: 1 / -1; }
  .field-mats { grid-template-columns: 1fr; }
}
@media (max-width: 900px) {
  .field-split, .field-short__grid, .field-why__grid, .field-dgrid, .field-next__grid { grid-template-columns: minmax(0, 1fr); }
  .field-split { align-items: start; }
  .field-steps { grid-template-columns: 1fr; gap: 28px; }
  .field-hero__media { height: clamp(280px, 54vh, 520px); margin-top: calc(var(--fs-display-1) * -0.6); }
  .field-hero__media img { object-position: 64% 60%; }
  .field-hero__media .illus-tag { top: auto; bottom: 64px; }
  .field-hero__body { margin-top: -56px; }
  .field-dcol + .field-dcol { margin-top: 36px; }
}
@media (max-width: 720px) {
  .field-sq { grid-template-columns: minmax(0, 1fr); }
  .field-eq > span:first-child { white-space: normal; }
  .field-eq { font-size: 17px; }
  .field-mats__list { grid-template-columns: 1fr; gap: 24px; }
  .field-readout { grid-template-columns: 1fr 1fr; }
  .field-readout__eps { grid-column: 1 / -1; display: flex; align-items: baseline; gap: 10px; }
  .field-readout__eps b { display: inline; margin: 0; font-size: 26px; }
  .field-readout__v { font-size: 28px; }
  .field-readout__row { grid-template-columns: 12px minmax(0, 1fr); }
  .field-readout__s { grid-column: 2; justify-self: start; }
  .field-sym div { grid-template-columns: 1fr; gap: 2px; }
  .field-fig__bar { flex-direction: column; align-items: flex-start; gap: 4px; }
  .field-fig__name { text-align: left; }
  .field-short__list li { padding-left: 40px; }
}
@media (prefers-reduced-motion: reduce) {
  .field-seg__b { transition: none; }
}