/* =====================================================================
   /interface/ : Model 6, nickel on palladium
   Series colours: bare Pd = purple-ink, PdD spacing = amber.
   Maps: diverging purple-ink / purple / dark / orange / amber; sequential bg-deep > purple > crimson > orange > amber.
   Every class is prefixed interface-.
   ===================================================================== */
.page-interface { --bare: var(--purple-ink); --pdd: var(--amber); }

/* ---------- section heads ---------- */
.interface-head { margin-bottom: clamp(36px, 5vw, 64px); }
.interface-head .display-2 { text-wrap: balance; }
.interface-head--split { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 20px clamp(32px, 5vw, 96px); align-items: end; }
.interface-head--split .lead { margin-top: 0; max-width: 52ch; }
.interface-head--split .lead a { color: var(--ink); text-decoration-color: var(--amber); }
@media (max-width: 900px) { .interface-head--split { grid-template-columns: 1fr; align-items: start; } }
.interface-chips { margin-top: 22px; }
.interface-u { font: 400 11px/1.3 var(--font-mono); color: var(--ink-3); letter-spacing: 0.02em; text-transform: none; }
.interface-h4 { font: 700 var(--fs-h4)/1.25 var(--font-display); letter-spacing: -0.015em; color: var(--ink); }
.interface-h4 .interface-u { font-weight: 400; margin-left: 6px; }

/* ---------- hero ---------- */
.interface-hero { position: relative; isolation: isolate; overflow: hidden; background: var(--bg-deep); min-height: min(calc(100svh - var(--header-h)), 940px); display: flex; }
.interface-hero--noimg { background: radial-gradient(60% 70% at 70% 60%, rgba(100, 13, 95, 0.55), transparent 70%), radial-gradient(30% 30% at 65% 55%, rgba(235, 91, 0, 0.3), transparent 70%), var(--bg-deep); }
.interface-hero__media { position: absolute; inset: 0; z-index: -2; }
.interface-hero__media img { width: 100%; height: 100%; object-fit: cover; object-position: 70% 50%; }
.interface-hero__media::after { content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background:
    linear-gradient(90deg, rgba(18, 18, 18, 0.9) 0%, rgba(18, 18, 18, 0.6) 30%, rgba(18, 18, 18, 0) 60%),
    linear-gradient(180deg, rgba(18, 18, 18, 0.2) 0%, rgba(18, 18, 18, 0) 40%, rgba(18, 18, 18, 0) 70%, var(--bg-deep) 100%); }
.interface-hero__media .illus-tag { left: auto; right: var(--gutter); bottom: 20px; }
.interface-hero__inner { position: relative; display: flex; flex-direction: column; padding-top: 28px; padding-bottom: clamp(36px, 4vw, 56px); }
.interface-hero .crumbs { margin-bottom: 0; }
.interface-hero__copy { margin-top: clamp(24px, 7vh, 104px); max-width: 1000px; }
.interface-hero__title { font: 400 clamp(58px, 10vw, 172px)/0.86 var(--font-display); letter-spacing: var(--track-display); margin-left: -0.04em; max-width: 8ch; text-shadow: 0 2px 40px rgba(0, 0, 0, 0.4); }
.interface-hero__lead { font: 400 var(--fs-lead)/1.38 var(--font-text); color: var(--ink-2); max-width: 36ch; margin-top: clamp(24px, 3vw, 40px); letter-spacing: -0.012em; text-wrap: pretty; }
.interface-hero__lead strong { color: var(--ink); font-weight: 400; }
.interface-onpage { display: flex; flex-wrap: wrap; gap: 4px 20px; margin-top: auto; padding-top: clamp(40px, 8vh, 96px); max-width: 760px; }
.interface-onpage a { font: 400 12.5px/1 var(--font-mono); color: var(--ink-2); text-decoration: none; padding: 9px 0; }
.interface-onpage a:hover { color: var(--amber); }
@media (max-width: 760px) {
  .interface-hero { flex-direction: column; min-height: 0; background: var(--bg); }
  .interface-hero__media { position: relative; order: 2; inset: auto; z-index: 0; aspect-ratio: 16 / 10; margin-top: 8px; }
  .interface-hero__media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, var(--bg) 0%, rgba(25, 25, 25, 0) 30%, rgba(25, 25, 25, 0) 75%, var(--bg) 100%); pointer-events: none; }
  .interface-hero__media img { object-position: 72% 50%; }
  .interface-hero__media .illus-tag { left: var(--gutter); right: auto; bottom: 14px; }
  .interface-hero__inner { order: 1; padding-bottom: 0; }
  .interface-hero__copy { margin-top: 28px; }
  .interface-onpage { order: 3; padding-top: 28px; gap: 0 16px; }
  .interface-onpage a { padding: 8px 0; }
}

/* ---------- in short ---------- */
.interface-short__grid { display: grid; grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr); gap: clamp(32px, 5vw, 88px); align-items: center; }
.interface-short__p { font: 400 clamp(18px, 1.45vw, 21px)/1.5 var(--font-text); color: var(--ink-2); max-width: 46ch; letter-spacing: -0.008em; }
.interface-short__p + .interface-short__p { margin-top: 0.75em; }
.interface-short__p strong { color: var(--ink); font-weight: 400; }
.interface-short .statbar__label { font-size: clamp(16px, 1.5vw, 23px); }
@media (max-width: 980px) { .interface-short__grid { grid-template-columns: 1fr; } }

/* ---------- three cards + method note ---------- */
.interface-three { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(16px, 2vw, 28px); margin-top: clamp(40px, 5vw, 72px); }
.interface-three__i { border-top: 3px solid var(--c); padding-top: 18px; }
.interface-three__k { font: 500 12px/1.3 var(--font-mono); color: var(--ink-3); letter-spacing: 0.03em; }
.interface-three__h { font: 400 clamp(24px, 2.2vw, 34px)/1.05 var(--font-display); letter-spacing: -0.03em; margin-top: 12px; }
.interface-three__i p:last-child { font: 400 16.5px/1.6 var(--font-text); color: var(--ink-2); margin-top: 14px; max-width: 40ch; }
.interface-method { margin-top: clamp(36px, 4vw, 56px); padding-top: 22px; border-top: 1px solid var(--line); font: 400 14px/1.7 var(--font-mono); color: var(--ink-2); max-width: 96ch; }
.interface-method strong { color: var(--ink); font-weight: 500; }
@media (max-width: 860px) { .interface-three { grid-template-columns: 1fr; } }

/* ---------- figure frame ---------- */
.interface-fig { margin: 0; border: 1px solid var(--line); border-radius: 10px; background: var(--bg-deep); overflow: hidden; min-width: 0; }
.band--deep .interface-fig { background: var(--bg); }
.interface-fig__bar { display: flex; align-items: center; 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-2); text-transform: uppercase; }
.interface-fig__tag { color: var(--amber); white-space: nowrap; }
.interface-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); }
.interface-fig__cap b { color: var(--ink-2); font-weight: 500; }
.interface-fig__cap .chip { margin: 2px 4px 0 0; }
.interface-fig__cap i, .interface-fig__cap sub { font-family: var(--font-text); }
.interface-noscript { margin-top: 12px; color: var(--ink-3); }

/* ---------- controls ---------- */
.interface-ctl { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 26px; padding: 14px 16px; border-bottom: 1px solid var(--line); }
.interface-ctl__g { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.interface-ctl__k { font: 500 11px/1 var(--font-mono); color: var(--ink-3); letter-spacing: 0.04em; text-transform: uppercase; margin-right: 6px; }
.interface-seg { font: 400 12.5px/1 var(--font-mono); color: var(--ink-2); padding: 9px 11px; min-height: 34px; border: 1px solid var(--line-2); border-radius: 3px; transition: color 0.2s, background 0.2s, border-color 0.2s; }
.interface-seg:hover { color: var(--ink); border-color: var(--ink-3); }
.interface-seg[aria-pressed="true"] { background: var(--amber); border-color: var(--amber); color: var(--on-amber); }
.interface-ctl__slider { flex: 1 1 300px; gap: 12px; }
.interface-ctl__slider input { flex: 1 1 160px; min-width: 140px; accent-color: var(--amber); height: 28px; cursor: pointer; }
.interface-ctl__out { font: 500 15px/1 var(--font-mono); color: var(--ink); min-width: 5.2em; text-align: right; font-variant-numeric: tabular-nums; }
.no-js .interface-ctl, .no-js .interface-readout, .no-js [data-rows], .no-js .interface-vern__low, .no-js .interface-maps__pair, .no-js .interface-scale, .no-js .interface-plot, .no-js .interface-pump__pair, .no-js .interface-legend { display: none; }

/* ---------- FIG 1 vernier ---------- */
.interface-vern__rows { padding: 8px 16px 0; }
.interface-vern__rows svg { display: block; width: 100%; height: auto; overflow: visible; }
.interface-vern__low { display: grid; grid-template-columns: minmax(0, 560px) minmax(0, 1fr); gap: 0; border-top: 1px solid var(--line); }
.interface-vern__map { position: relative; aspect-ratio: 1 / 1; border-right: 1px solid var(--line); background: var(--bg-deep); }
.interface-vern__map canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.interface-vern__read { padding: 22px 22px 20px; display: flex; flex-direction: column; gap: 14px; }
.interface-vern__k { font: 500 12px/1.3 var(--font-mono); color: var(--amber); letter-spacing: 0.03em; }
.interface-vern__big { font: 400 clamp(56px, 6vw, 96px)/0.9 var(--font-display); letter-spacing: var(--track-display); color: var(--ink); font-variant-numeric: tabular-nums; }
.interface-vern__dl { display: grid; border-top: 1px solid var(--line); }
.interface-vern__dl div { display: grid; grid-template-columns: 10.5em minmax(0, 1fr); gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.interface-vern__dl dt { font: 500 11px/1.5 var(--font-mono); color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.03em; }
.interface-vern__dl dd { margin: 0; font: 400 14px/1.5 var(--font-mono); color: var(--ink); font-variant-numeric: tabular-nums; }
.interface-vern__note { font: 400 12.5px/1.6 var(--font-mono); color: var(--ink-3); margin-top: auto; }
.interface-v-pd { fill: var(--bg-raise-2); stroke: var(--ink-3); stroke-width: 1.2; }
.interface-v-ni { stroke: var(--bg-deep); stroke-width: 1.5; }
.interface-v-lab { font: 500 12px var(--font-mono); fill: var(--ink-2); letter-spacing: 0.04em; }
.interface-v-sub { font: 400 11px var(--font-mono); fill: var(--ink-3); }
.interface-v-dim { stroke: var(--ink); stroke-width: 1.2; fill: none; }
.interface-v-dimt { font: 500 12.5px var(--font-mono); fill: var(--ink); }
.interface-v-tick { stroke: var(--line-2); stroke-width: 1; }
.interface-v-guide { stroke: var(--amber); stroke-width: 1; stroke-dasharray: 3 4; opacity: 0.7; }
@media (max-width: 760px) {
  .interface-vern__low { grid-template-columns: 1fr; }
  .interface-vern__map { border-right: 0; border-bottom: 1px solid var(--line); }
  .interface-vern__dl div { grid-template-columns: 8.5em minmax(0, 1fr); }
}

/* ---------- maps (FIG 2, FIG 4) ---------- */
.interface-maps__pair { display: grid; grid-template-columns: 1fr 1fr; gap: 0; }
.interface-maps__panel { padding: 14px 16px 8px; min-width: 0; display: flex; flex-direction: column; align-items: center; }
.interface-maps__panel > * { width: 100%; max-width: 474px; }
.interface-maps__panel + .interface-maps__panel { border-left: 1px solid var(--line); }
.interface-maps__t { font: 400 12.5px/1.4 var(--font-mono); color: var(--ink-3); margin-bottom: 8px; display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.interface-maps__t b { color: var(--ink); font-weight: 500; text-transform: uppercase; letter-spacing: 0.03em; }
.interface-maps__svg { display: block; width: 100%; height: auto; overflow: visible; touch-action: pan-y; }
.interface-maps__svg:focus { outline: none; }
.interface-maps__svg:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; }
.interface-cell { stroke: var(--bg-deep); stroke-width: 0.6; }
.interface-cell.is-hot { stroke: var(--ink); stroke-width: 2; }
.interface-rep { fill: none; stroke: var(--ink); stroke-width: 1.4; stroke-dasharray: 5 4; pointer-events: none; }
.interface-rept { font: 500 11.5px var(--font-mono); fill: var(--ink); paint-order: stroke; stroke: var(--bg-deep); stroke-width: 3px; pointer-events: none; }
.interface-axt { font: 400 10.5px var(--font-mono); fill: var(--ink-3); }
.interface-axl { font: 500 10.5px var(--font-mono); fill: var(--ink-2); letter-spacing: 0.03em; }
.interface-axis { stroke: var(--line-2); stroke-width: 1; }
@media (max-width: 760px) {
  .interface-maps__pair { grid-template-columns: 1fr; }
  .interface-maps__panel + .interface-maps__panel { border-left: 0; border-top: 1px solid var(--line); }
}

/* colour scale with computed-range bracket and per-site strip */
.interface-scale { padding: 6px 16px 4px; border-top: 1px solid var(--line); }
.interface-scale svg { display: block; width: 100%; height: auto; overflow: visible; }
.interface-scale--sm { border-top: 0; padding: 4px 0 0; }
.interface-sc-t { font: 400 10.5px var(--font-mono); fill: var(--ink-3); font-variant-numeric: tabular-nums; }
.interface-sc-l { font: 500 11px var(--font-mono); fill: var(--ink-2); letter-spacing: 0.03em; }
.interface-sc-tick { stroke: var(--ink-3); stroke-width: 1; }
.interface-sc-strip { stroke-width: 1.5; stroke-linecap: round; }
.interface-sc-strip--bare { stroke: var(--bare); }
.interface-sc-strip--pdd { stroke: var(--pdd); }
.interface-sc-brk { fill: none; stroke: var(--ink); stroke-width: 1.4; }
.interface-sc-brkt { font: 500 11px var(--font-mono); fill: var(--ink); }
.interface-sc-out { fill: url(#interface-hatch); }
.interface-sc-zero { stroke: var(--ink); stroke-width: 1; }
.interface-readout { padding: 11px 16px; border-top: 1px solid var(--line); font: 400 12.5px/1.55 var(--font-mono); color: var(--ink-3); min-height: 3.6em; }
.interface-readout b { color: var(--ink); font-weight: 500; }

/* ---------- 07.2 beneath ---------- */
.interface-beneath .interface-maps { margin-bottom: clamp(28px, 3vw, 44px); }
.interface-beneath__grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); gap: clamp(28px, 4vw, 64px); align-items: start; }
.interface-beneath__side { display: grid; gap: 24px; }
.interface-fact { border-top: 1px solid var(--line-2); padding-top: 14px; }
.interface-fact__k { font: 500 12px/1.3 var(--font-mono); color: var(--amber); letter-spacing: 0.03em; }
.interface-fact__p { font: 400 16px/1.6 var(--font-text); color: var(--ink-2); margin-top: 8px; max-width: 58ch; }
.interface-fact__p a { color: var(--ink); text-decoration-color: var(--amber); }
@media (max-width: 980px) { .interface-beneath__grid { grid-template-columns: 1fr; } }

/* depth chart */
.interface-plot { position: relative; min-height: 280px; }
.interface-plot svg { display: block; width: 100%; height: auto; overflow: visible; }
.interface-grid { stroke: var(--line); stroke-width: 1; }
.interface-axisl { stroke: var(--line-2); stroke-width: 1; }
.interface-tick { font: 400 11px var(--font-mono); fill: var(--ink-3); font-variant-numeric: tabular-nums; }
.interface-axl2 { font: 500 11px var(--font-mono); fill: var(--ink-2); letter-spacing: 0.03em; }
.interface-lab { font: 500 12px var(--font-mono); fill: var(--ink); }
.interface-lab--sub { font-weight: 400; fill: var(--ink-3); font-size: 11px; }
.interface-line { fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.interface-line--bare { stroke: var(--bare); }
.interface-line--pdd { stroke: var(--pdd); }
.interface-pt { stroke: var(--bg); stroke-width: 2; pointer-events: none; }
.interface-pt--bare { fill: var(--bare); }
.interface-pt--pdd { fill: var(--pdd); }
.interface-pt.is-fixed { fill: var(--bg); stroke-width: 2; }
.interface-pt--bare.is-fixed { stroke: var(--bare); }
.interface-pt--pdd.is-fixed { stroke: var(--pdd); }
.interface-fixband { fill: color-mix(in srgb, var(--ink) 6%, transparent); }
.interface-hit { fill: transparent; }
.interface-hit:focus { outline: none; }
.interface-hit:focus-visible { stroke: var(--amber); stroke-width: 2; }
.interface-legend { display: flex; flex-wrap: wrap; gap: 6px 20px; padding: 12px 16px; border-top: 1px solid var(--line); font: 400 12px/1.4 var(--font-mono); color: var(--ink-3); }
.interface-li { display: inline-flex; align-items: center; gap: 8px; white-space: nowrap; }
.interface-key { display: inline-block; flex: none; width: 18px; height: 3px; border-radius: 1px; background: var(--ink-2); }
.interface-key--bare { background: var(--bare); }
.interface-key--pdd { background: var(--pdd); }
.interface-key--hollow { width: 10px; height: 10px; border-radius: 50%; background: transparent; border: 2px solid var(--ink-2); }

.interface-tip { position: fixed; z-index: 300; max-width: 300px; padding: 9px 11px; background: var(--paper-2); color: var(--paper-ink); font: 400 12.5px/1.45 var(--font-mono); border-radius: 4px; box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45); pointer-events: none; opacity: 0; transform: translateY(4px); transition: opacity 0.12s, transform 0.12s; }
.interface-tip.is-on { opacity: 1; transform: none; }
.interface-tip b { font-weight: 600; }

/* ---------- 07.3 wells ---------- */
.interface-wells__grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(20px, 3vw, 44px); margin-top: clamp(32px, 4vw, 52px); }
@media (max-width: 980px) { .interface-wells__grid { grid-template-columns: 1fr; } }
.interface-uncert { display: grid; grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.6fr) minmax(0, 0.8fr); gap: 20px clamp(24px, 3.5vw, 56px); margin-top: clamp(48px, 6vw, 88px); padding: clamp(22px, 2.6vw, 36px); border: 1px solid var(--line); border-left: 3px solid var(--amber); border-radius: 0 10px 10px 0; background: var(--bg-raise); }
.interface-uncert .kicker { margin-bottom: 12px; }
.interface-uncert__body p { font: 400 16px/1.65 var(--font-text); color: var(--ink-2); }
.interface-uncert__body p + p { margin-top: 0.9em; }
.interface-uncert__pair { display: grid; gap: 18px; align-content: start; }
.interface-uncert__pair div { display: flex; flex-direction: column-reverse; gap: 6px; border-top: 1px solid var(--line-2); padding-top: 10px; }
.interface-uncert__pair dt { font: 400 11.5px/1.35 var(--font-mono); color: var(--ink-3); }
.interface-uncert__pair dd { margin: 0; font: 400 clamp(36px, 3.6vw, 54px)/0.9 var(--font-display); letter-spacing: var(--track-display); color: var(--ink); white-space: nowrap; }
.interface-uncert__pair div:last-child dd { color: var(--amber); }
@media (max-width: 1100px) { .interface-uncert { grid-template-columns: minmax(0, 1fr) minmax(0, 0.6fr); } .interface-uncert__head { grid-column: 1 / -1; } }
@media (max-width: 640px) { .interface-uncert { grid-template-columns: 1fr; } }

/* ---------- 07.4 pumped ---------- */
.interface-pump { margin-bottom: clamp(32px, 4vw, 56px); }
.interface-pump__pair { display: grid; grid-template-columns: 1fr 1fr; }
.interface-pump__panel { padding: 14px 16px 10px; min-width: 0; }
.interface-pump__panel + .interface-pump__panel { border-left: 1px solid var(--line); }
.interface-pump__t { font: 400 12.5px/1.4 var(--font-mono); color: var(--ink-3); margin-bottom: 10px; }
.interface-pump__t b { color: var(--ink); font-weight: 500; text-transform: uppercase; letter-spacing: 0.03em; }
.interface-pump__map { position: relative; aspect-ratio: 1 / 1; background: var(--bg-deep); touch-action: pan-y; }
.interface-pump__map canvas { position: absolute; inset: 0; width: 100%; height: 100%; image-rendering: pixelated; }
.interface-pump__map:focus { outline: none; }
.interface-pump__map:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; }
@media (max-width: 760px) {
  .interface-pump__pair { grid-template-columns: 1fr; }
  .interface-pump__panel + .interface-pump__panel { border-left: 0; border-top: 1px solid var(--line); }
}
.interface-pumped__grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(28px, 4vw, 64px); align-items: start; }
.interface-nums { display: grid; grid-template-columns: 1fr 1fr; gap: 26px 28px; }
.interface-nums__i { border-top: 1px solid var(--line-2); padding-top: 12px; }
.interface-nums__v { font: 400 clamp(36px, 3.6vw, 56px)/0.95 var(--font-display); letter-spacing: var(--track-head); color: var(--ink); font-variant-numeric: tabular-nums; }
.interface-nums__i:first-child .interface-nums__v { font-size: clamp(26px, 2.5vw, 38px); }
.interface-nums__arr { color: var(--amber); }
.interface-nums__u { font: 400 0.5em/1 var(--font-mono); color: var(--ink-3); margin-left: 4px; letter-spacing: 0; }
.interface-nums__l { font: 400 13px/1.55 var(--font-mono); color: var(--ink-3); margin-top: 10px; }
.interface-pumped__prose p { font-size: 16.5px; }
@media (max-width: 980px) { .interface-pumped__grid { grid-template-columns: 1fr; } }
@media (max-width: 480px) { .interface-nums { grid-template-columns: 1fr; } }
.interface-why { margin-top: clamp(40px, 5vw, 72px); padding-top: 22px; border-top: 3px solid var(--crimson); display: grid; grid-template-columns: minmax(0, 0.35fr) minmax(0, 1fr); gap: 12px 40px; }
.interface-why__k { font: 500 12px/1.4 var(--font-mono); color: var(--crimson-ink); letter-spacing: 0.03em; }
.interface-why__p { font: 400 clamp(19px, 1.6vw, 24px)/1.45 var(--font-text); color: var(--ink); max-width: 60ch; letter-spacing: -0.01em; }
.interface-why__p a { text-decoration-color: var(--amber); }
@media (max-width: 760px) { .interface-why { grid-template-columns: 1fr; } }

/* ---------- tables ---------- */
.interface-table td { font-variant-numeric: tabular-nums; min-width: 0; }
.interface-table td:first-child { min-width: 0; }
.interface-table th { white-space: normal; }
.interface-m, .interface-table th .interface-u { text-transform: none; letter-spacing: 0; }
.interface-table th .interface-m { font-family: var(--font-text); font-size: 13px; font-weight: 400; }
.interface-table tr.is-fixed td { color: var(--ink-3); }
.interface-table tr.is-total td { color: var(--ink); border-top: 1px solid var(--line-2); }
.interface-tag { display: inline-block; font: 500 10px/1 var(--font-mono); color: var(--ink-3); border: 1px solid var(--line-2); border-radius: 3px; padding: 3px 4px 2px; margin-left: 4px; text-transform: uppercase; letter-spacing: 0.04em; vertical-align: 0.1em; }

/* ---------- detail ---------- */
.interface-detail__cols { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: clamp(32px, 5vw, 88px); align-items: start; }
.interface-detail__eqs .interface-h4 { margin-top: 34px; }
.interface-detail__eqs .interface-h4:first-child { margin-top: 0; }
.interface-eq { display: flex; align-items: baseline; gap: 18px; margin-top: 14px; padding: 16px 18px; background: var(--bg-raise); border-left: 2px solid var(--crimson); border-radius: 0 6px 6px 0; overflow-x: auto; }
.interface-eq__n { font: 500 12px/1 var(--font-mono); color: var(--crimson-ink); flex: none; }
.interface-eq__f { font: 400 clamp(18px, 1.7vw, 25px)/1.4 var(--font-text); color: var(--ink); letter-spacing: 0.005em; white-space: nowrap; }
.interface-eq__f sub, .interface-eq__f sup { font-size: 0.62em; }
.interface-def { font: 400 15.5px/1.65 var(--font-text); color: var(--ink-2); margin-top: 12px; max-width: 72ch; }
.interface-def i, .interface-def b, .interface-note i, .interface-note b { color: var(--ink); }
.interface-spec { display: grid; margin-top: 14px; border-top: 1px solid var(--line); }
.interface-spec div { display: grid; grid-template-columns: 7.5em minmax(0, 1fr); gap: 14px; padding: 11px 0; border-bottom: 1px solid var(--line); }
.interface-spec dt { font: 500 11.5px/1.5 var(--font-mono); color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.03em; }
.interface-spec dd { margin: 0; font: 400 13.5px/1.55 var(--font-mono); color: var(--ink-2); }
.interface-tables { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 3vw, 48px) clamp(24px, 3vw, 48px); margin-top: clamp(56px, 6vw, 96px); padding-top: clamp(32px, 4vw, 56px); border-top: 1px solid var(--line); }
.interface-tables__i { min-width: 0; }
.interface-tables__i--wide { grid-column: 1 / -1; }
.interface-tables__i .table-wrap { margin: 14px 0 0; }
.interface-note { font: 400 12.5px/1.6 var(--font-mono); color: var(--ink-3); margin-top: 10px; max-width: 80ch; }
.interface-note a { color: var(--ink-2); }
@media (max-width: 980px) { .interface-detail__cols, .interface-tables { grid-template-columns: 1fr; } }
@media (max-width: 520px) {
  .interface-spec div { grid-template-columns: 1fr; gap: 4px; }
  .interface-eq { padding: 14px 12px; gap: 10px; }
}
@media (max-width: 600px) { .interface-eq__f { white-space: normal; } }

/* ---------- next ---------- */
.interface-next__grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(32px, 5vw, 88px); align-items: start; }
.interface-next__lead { margin-top: 24px; }
@media (max-width: 900px) { .interface-next__grid { grid-template-columns: 1fr; } }

:is(.interface-short__grid, .interface-beneath__grid, .interface-pumped__grid, .interface-detail__cols, .interface-next__grid, .interface-head--split, .interface-vern__low, .interface-maps__pair, .interface-pump__pair) > * { min-width: 0; }