/* Biotherm Heat · PelleTech BU (produkter/bu.html), ovanpå bas.css, sajt.css och produkter.css (bara produktkorten).
   Anslutning, före och efter. Avsnitt: hjälte (BU dockad mot en befintlig panna, bilden först) · 01 före och efter (signatur) ·
   02 så fungerar BU (genomskärningen) · 03 storlekar (halsen i skala, signatur två) · 04 konstruktion och drift · 05 hela kedjan ·
   avslutning. Inga levande värmeflöden här – det enda är avslutningens. Lågan är en stillbild (bu-laga.webp). */

/* ---------- gemensamt ---------- */
.bu-data { display: grid; grid-template-columns: repeat(var(--kol, 4), minmax(0, 1fr)); column-gap: var(--spalt); row-gap: 26px; }
.bu-data > div { position: relative; padding-top: 16px; border-top: 1px solid var(--linje-2); }
.bu-data dt { font-size: .8125rem; line-height: 1.3; font-weight: 600; font-stretch: 80%; font-variation-settings: "opsz" 12; letter-spacing: .16em; text-transform: uppercase; color: var(--is-3); }
.bu-data dd { margin: 10px 0 0; font-size: clamp(1.125rem, 1.02rem + .3vw, 1.375rem); line-height: 1.32; font-weight: 340; letter-spacing: -.005em; color: var(--is); font-variant-numeric: tabular-nums; text-wrap: pretty; }
.bu-nr { flex: none; display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; box-shadow: inset 0 0 0 1.5px #a9c6ee; font-size: .8125rem; font-weight: 520; line-height: 1; color: var(--is); font-variant-numeric: tabular-nums; }
.varm > .bu-nr, .bu-nr.varm { box-shadow: inset 0 0 0 1.5px #f6a650, 0 0 16px rgba(242, 154, 60, .45); color: var(--glod); }
.bu-pt { position: absolute; left: var(--x); top: var(--y); z-index: 2; width: 32px; height: 32px; margin: -16px 0 0 -16px; border-radius: 50%; display: grid; place-items: center;
  background: rgba(4, 10, 24, .86); box-shadow: inset 0 0 0 1.5px #d6e6fa, 0 0 0 5px rgba(4, 10, 24, .35), 0 0 18px rgba(110, 165, 235, .45);
  font-size: .875rem; font-weight: 560; color: var(--is); font-variant-numeric: tabular-nums; transition: transform .5s var(--ease), box-shadow .5s ease; }
.bu-pt.varm { box-shadow: inset 0 0 0 1.5px #f6a650, 0 0 0 5px rgba(4, 10, 24, .35), 0 0 20px rgba(242, 154, 60, .6); color: var(--glod); }
.bu-pt.lyser { transform: scale(1.22); box-shadow: inset 0 0 0 2px #fff, 0 0 0 6px rgba(0, 152, 212, .35), 0 0 26px rgba(120, 180, 240, .8); }
.bu-pt.varm.lyser { box-shadow: inset 0 0 0 2px #ffd7a0, 0 0 0 6px rgba(242, 154, 60, .3), 0 0 28px rgba(242, 154, 60, .9); }
.bu-rader > div { display: grid; grid-template-columns: minmax(0, 12rem) minmax(0, 1fr); column-gap: 20px; padding: 14px 0 15px; border-top: 1px solid var(--linje); }
.bu-rader > div:last-child { border-bottom: 1px solid var(--linje); }
.bu-rader dt { display: flex; align-items: center; gap: 12px; font-size: 1.0625rem; line-height: 1.4; font-weight: 440; color: var(--is); }
.bu-rader dd { margin: 0; font-size: 1rem; line-height: 1.5; color: var(--is-2); }
.bu-rader sub { font-size: .72em; vertical-align: -.25em; line-height: 0; }

/* ---------- hjälte: bilden först – BU dockad mot pannan ---------- */
.bu-hjalte { position: relative; padding-top: 128px; overflow: hidden; isolation: isolate;
  background: radial-gradient(48% 34% at 70% 40%, rgba(31, 92, 170, .16), rgba(31, 92, 170, 0) 70%), var(--natt); }
.bu-dock { position: relative; margin: clamp(20px, 2.4vw, 40px) 0 0; padding-left: var(--marg); }
.bu-dock-yta { position: relative; width: min(calc(100vw - var(--marg)), 1880px, calc(max(400px, var(--vh) * 100 - 540px) * 3.085)); aspect-ratio: 3600 / 1167; }
.bu-dock-bu { position: absolute; left: 0; top: 0; width: 55.556%; height: auto; z-index: 1; filter: drop-shadow(0 28px 36px rgba(0, 0, 0, .55)); }
.bu-dock-svg { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; z-index: 2; pointer-events: none; }
.bu-dock-svg .spok { fill: none; stroke: rgba(170, 196, 228, .5); stroke-width: 1.3; vector-effect: non-scaling-stroke; }
.bu-dock-svg .spok * { vector-effect: non-scaling-stroke; }
.bu-dock-svg .spok .dold { stroke-dasharray: 5 6; stroke: rgba(170, 196, 228, .32); }
.bu-dock-svg .spok .golv { stroke: rgba(170, 196, 228, .16); }
.bu-dock-svg .laga { opacity: .95; }

.js .bu-dock .laga, .js .bu-dock .sken, .js .bu-dock .hals { opacity: 0; transition: opacity 1.6s ease .9s; }
.js .bu-dock.syns .laga, .js .bu-dock.syns .sken, .js .bu-dock.syns .hals { opacity: 1; }

.bu-dock-etikett { position: absolute; z-index: 3; white-space: nowrap; font-size: .8125rem; line-height: 1.3; font-weight: 600; font-stretch: 80%; font-variation-settings: "opsz" 12; letter-spacing: .16em; text-transform: uppercase; color: var(--is-2); }
.bu-dock-etikett::before { content: ""; display: inline-block; width: 28px; height: 1px; margin-right: 12px; vertical-align: middle; background: currentColor; }
.bu-dock-etikett.panna { left: 61%; top: -2%; }

.bu-hjalte-in { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--spalt); row-gap: 36px; padding-top: clamp(28px, 3vw, 52px); padding-bottom: 8px; }
.bu-hjalte-v { grid-column: 1 / -1; }
.bu-hjalte-v .t-h1 { margin-top: 24px; font-size: clamp(3.25rem, 1.2rem + 4.6vw, 7rem); }
.bu-hjalte-h { grid-column: 1 / span 5; }
.bu-hjalte-h .t-ingress { max-width: 34ch; }
.bu-knappar { margin-top: 34px; display: flex; flex-wrap: wrap; align-items: center; gap: 18px 32px; }
.bu-knappar .lank { white-space: nowrap; }
.bu-pdf { margin-left: 2px; font-size: .875rem; font-weight: 380; color: var(--is-3); font-variant-numeric: tabular-nums; }
.bu-hjalte-data { --kol: 2; grid-column: 7 / span 6; align-self: start; padding-top: 6px; }

/* ---------- 01 före och efter ---------- */
.bu-fe { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--spalt); row-gap: 32px; align-items: center; }
.bu-fe-val { grid-column: 1 / -1; display: flex; gap: clamp(24px, 3vw, 56px); border-bottom: 1px solid var(--linje); }
.bu-fe-val button { position: relative; display: flex; flex-direction: column; align-items: flex-start; gap: 8px; padding: 6px 2px 18px; text-align: left;
  font-size: clamp(1.375rem, 1.1rem + .8vw, 2.125rem); line-height: 1.1; font-weight: 300; letter-spacing: -.016em; font-variation-settings: "opsz" 40; color: var(--is-3); transition: color .4s ease; }
.bu-fe-val button .t-etikett { transition: color .4s ease; }
.bu-fe-val button::after { content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; border-radius: 2px; background: var(--flode); transform: scaleX(0); transform-origin: 0 50%; transition: transform .7s var(--ease); }
.bu-fe-val button:hover { color: var(--is-2); }
.bu-fe-val button[aria-checked="true"] { color: var(--is); }
.bu-fe-val button[aria-checked="true"] .t-etikett { color: var(--is-2); }
.bu-fe-val button[aria-checked="true"]::after { transform: scaleX(1); }
.bu-fe-val button[data-lage-knapp="fore"]::after { background: linear-gradient(90deg, #6b7a92, #9fb4c4); }
.bu-fe-bild { grid-column: 1 / -1; position: relative; margin: 0 auto; width: 100%; max-width: 1360px; }
.bu-fe-bild svg { display: block; width: 100%; height: auto; overflow: visible; }
.bu-fe-bild svg g, .bu-fe-bild svg .golv { fill: none; stroke: rgba(170, 196, 228, .5); stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }
.bu-fe-bild svg * { vector-effect: non-scaling-stroke; }
.bu-fe-bild svg .golv { stroke: rgba(170, 196, 228, .2); }
.bu-fe-bild svg .panna { stroke: rgba(214, 230, 250, .85); stroke-width: 1.6; }
.bu-fe-bild svg .panna .dold { stroke: rgba(214, 230, 250, .35); stroke-dasharray: 5 6; }
.bu-fe-bild svg .fore { stroke: rgba(159, 180, 196, .8); }
.bu-fe-bild svg .fore .ledning { stroke-dasharray: 2 6; }
.bu-fe-bild svg .efter { stroke: rgba(214, 230, 250, .75); }
.bu-fe-bild svg .efter .skruv-g { stroke: rgba(214, 230, 250, .4); stroke-dasharray: 3 7; }
.bu-fe-bild svg .fore, .bu-fe-bild svg .efter, .bu-fe-etikett.fore, .bu-fe-etikett.efter { transition: opacity .6s ease; }
.bu-fe[data-lage="efter"] .fore, .bu-fe[data-lage="fore"] .efter { opacity: 0; }
.bu-fe-bild svg .laga { transition: opacity .8s ease; }
.bu-fe[data-lage="fore"] .bu-fe-bild svg .laga { opacity: .55; }
.bu-fe-etikett { position: absolute; white-space: nowrap; font-size: .8125rem; line-height: 1.3; font-weight: 600; font-stretch: 80%; font-variation-settings: "opsz" 12; letter-spacing: .16em; text-transform: uppercase; color: var(--is-2); }
.bu-fe-etikett.e-panna { left: 60%; top: 24%; color: var(--is); }
.bu-fe-etikett.e-bu { left: 26%; top: 33%; }
.bu-fe-etikett.e-silo { left: 6.5%; top: 2%; }
.bu-fe-etikett.e-brannare { right: 47%; top: 56%; }
.bu-fe-etikett.e-tank { left: 7.5%; top: 64%; }
.bu-fe-tabell-wrap { grid-column: 1 / -1; }
.bu-fe-tabell { width: 100%; border-collapse: collapse; table-layout: fixed; }
.bu-fe-tabell th, .bu-fe-tabell td { padding: 16px 16px 18px 0; text-align: left; vertical-align: top; font-size: 1.0625rem; line-height: 1.42; border-bottom: 1px solid var(--linje); }
.bu-fe-tabell thead td { width: 9rem; border-bottom-color: var(--linje-2); }
.bu-fe-tabell thead th { padding-top: 0; padding-bottom: 14px; font-size: .8125rem; font-weight: 600; font-stretch: 80%; letter-spacing: .16em; text-transform: uppercase; color: var(--is-3); border-bottom-color: var(--linje-2); }
.bu-fe-tabell tbody th { position: relative; font-size: clamp(1.25rem, 1.05rem + .5vw, 1.625rem); line-height: 1.15; font-weight: 300; letter-spacing: -.014em; color: var(--is-3); transition: color .5s ease; }
.bu-fe-tabell td { color: var(--is-3); transition: color .5s ease; }
.bu-fe-tabell td small { display: block; margin-top: 4px; font-size: .875rem; color: var(--is-3); }
.bu-fe-tabell tr.k-efter th::after { content: ""; position: absolute; left: 0; bottom: -1px; width: 3.5rem; height: 2px; background: var(--flode); opacity: 0; transition: opacity .5s ease; }
.bu-fe-tabell tr.k-fore th::after { content: ""; position: absolute; left: 0; bottom: -1px; width: 3.5rem; height: 2px; background: linear-gradient(90deg, #6b7a92, #9fb4c4); opacity: 0; transition: opacity .5s ease; }
.bu-fe[data-lage="efter"] tr.k-efter th, .bu-fe[data-lage="efter"] tr.k-efter td, .bu-fe[data-lage="fore"] tr.k-fore th, .bu-fe[data-lage="fore"] tr.k-fore td { color: var(--is); }
.bu-fe[data-lage="efter"] tr.k-efter th::after, .bu-fe[data-lage="fore"] tr.k-fore th::after { opacity: 1; }

/* ---------- 02 så fungerar BU ---------- */
.bu-snitt { position: relative; margin: 0 auto; max-width: 1180px; padding-right: clamp(0px, 8vw, 130px); }
.bu-snitt img { display: block; width: 100%; height: auto; filter: drop-shadow(0 30px 40px rgba(0, 0, 0, .55)); }
.bu-snitt-in { position: relative; }
.bu-snitt-ut { position: absolute; right: 0; top: 41.4%; width: clamp(0px, 8vw, 130px); transform: translateY(-50%); padding-left: 18px; font-size: .75rem; line-height: 1.35; font-weight: 600; font-stretch: 80%; font-variation-settings: "opsz" 12; letter-spacing: .16em; text-transform: uppercase; color: var(--glod); white-space: normal; }
.bu-snitt-ut i { position: absolute; left: -2px; top: -16px; width: 64px; height: 1px; background: linear-gradient(90deg, #f29a3c, #ffd7a0); }
.bu-snitt-ut i::after { content: ""; position: absolute; right: -1px; top: -4px; width: 8px; height: 8px; border-top: 1px solid #ffd7a0; border-right: 1px solid #ffd7a0; transform: rotate(45deg); }
.bu-delar { margin-top: clamp(48px, 5vw, 80px); display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); column-gap: var(--spalt); row-gap: 34px; }
.bu-delar li { display: grid; grid-template-columns: 28px minmax(0, 1fr); column-gap: 14px; align-content: start; padding-top: 16px; border-top: 1px solid var(--linje-2); }
.bu-delar .bu-nr { grid-row: 1 / span 2; }
.bu-delar h3 { font-size: 1.125rem; line-height: 28px; font-weight: 440; color: var(--is); }
.bu-delar li.varm h3 { color: var(--glod); }
.bu-delar p { margin-top: 4px; font-size: .9375rem; line-height: 1.5; color: var(--is-2); }
.bu-delar li.lyser h3 { color: #fff; }

/* ---------- 03 storlekar: halsen i skala ---------- */
.bu-st { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--spalt); row-gap: 40px; align-items: center; }
.bu-ringar { grid-column: 1 / span 6; position: relative; margin: 0; width: 100%; max-width: 560px; justify-self: center; aspect-ratio: 1; }
.bu-ringar svg { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.bu-ringar .ringar circle { fill: none; stroke: rgba(170, 196, 228, .26); stroke-width: 1.2; vector-effect: non-scaling-stroke; transition: stroke .5s ease; }
.bu-ringar .ringar circle.under { stroke: rgba(170, 196, 228, .42); }
.bu-ringar .glod { opacity: .7; }
.bu-ringar .vald { fill: none; stroke-width: 2.4; vector-effect: non-scaling-stroke; transition: r .8s var(--ease); }
.bu-ringar .glod { transition: r .8s var(--ease); }
.bu-ringar .matt path { fill: none; stroke: rgba(214, 230, 250, .5); stroke-width: 1; vector-effect: non-scaling-stroke; }
.bu-ringar .matt { transition: transform .8s var(--ease); transform-origin: 500px 500px; }
.bu-ringar-d { position: absolute; left: 50%; top: 50%; transform: translate(-50%, calc(-100% - 10px)); text-align: center; white-space: nowrap; }
.bu-ringar-d .t-etikett { display: block; margin-bottom: 6px; color: var(--is-2); }
.bu-ringar-d b { font-size: clamp(2rem, 1.4rem + 1.8vw, 3.25rem); font-weight: 260; letter-spacing: -.03em; line-height: 1; color: var(--is); font-variant-numeric: tabular-nums; }
.bu-ringar-d small { margin-left: 6px; font-size: 1rem; color: var(--is-3); }
.bu-st-text { grid-column: 7 / span 6; }
.bu-st-val { display: flex; flex-wrap: wrap; gap: 4px 2px; }
.bu-st-val::before { content: "BU"; align-self: center; margin-right: 12px; font-size: .8125rem; font-weight: 600; font-stretch: 80%; letter-spacing: .16em; color: var(--is-3); }
.bu-st-val button { position: relative; min-width: 54px; height: 52px; padding: 0 8px; font-size: 1.25rem; font-weight: 340; color: var(--is-3); font-variant-numeric: tabular-nums; border-radius: 6px; transition: color .4s ease; }
.bu-st-val button::after { content: ""; position: absolute; left: 8px; right: 8px; bottom: 4px; height: 2px; border-radius: 2px; background: var(--linje-2); transition: background-color .4s ease; }
.bu-st-val button:hover { color: var(--is); }
.bu-st-val button[aria-checked="true"] { color: var(--is); }
.bu-st-val button[aria-checked="true"]::after { background: var(--flode); }
.bu-st-namn { margin-top: clamp(24px, 3vw, 44px); display: flex; align-items: baseline; gap: .18em; font-size: clamp(4rem, 2rem + 5vw, 7.5rem); line-height: .95; font-weight: 240; font-variation-settings: "opsz" 96; letter-spacing: -.035em; font-variant-numeric: tabular-nums; }
.bu-st-namn span { font-size: .42em; letter-spacing: -.01em; color: var(--is-3); }
.bu-st-namn b { font-weight: inherit; }
.bu-st-data { --kol: 2; margin-top: clamp(28px, 3vw, 44px); }
.bu-tabell-wrap { margin-top: clamp(56px, 6vw, 96px); overflow-x: auto; overscroll-behavior-x: contain; scrollbar-width: thin; scrollbar-color: var(--linje-2) transparent; }
.bu-tabell-wrap:focus-visible { outline-offset: 4px; }
.bu-tabell { width: 100%; min-width: 860px; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.bu-tabell th, .bu-tabell td { padding: 12px 10px; text-align: right; white-space: nowrap; font-size: .9375rem; line-height: 1.35; border-bottom: 1px solid var(--linje); transition: background-color .4s ease, color .4s ease; }
.bu-tabell thead tr.serie th { padding: 0 10px 12px; text-align: center; font-size: .75rem; font-weight: 600; font-stretch: 80%; letter-spacing: .16em; text-transform: uppercase; color: var(--is-3); white-space: normal; border-bottom: 1px solid var(--linje-2); }
.bu-tabell thead tr.serie td { border-bottom: 0; }
.bu-tabell thead tr:not(.serie) th { padding-top: 16px; padding-bottom: 14px; font-size: clamp(1.0625rem, .95rem + .35vw, 1.375rem); font-weight: 300; letter-spacing: -.01em; color: var(--is-2); border-bottom-color: var(--linje-2); }
.bu-tabell thead tr:not(.serie) th:first-child { text-align: left; padding-left: 0; font-size: .8125rem; font-weight: 600; font-stretch: 80%; letter-spacing: .16em; text-transform: uppercase; color: var(--is-3); }
.bu-tabell tbody th { text-align: left; font-weight: 380; color: var(--is-2); padding-left: 0; }
.bu-tabell td { color: var(--is-2); font-weight: 360; }
.bu-tabell th:first-child, .bu-tabell td:first-child { position: sticky; left: 0; z-index: 1; background: var(--natt); padding-right: 24px; }
.bu-tabell .vald { color: var(--is); background-color: rgba(0, 152, 212, .08); }
.bu-tabell thead .vald { color: var(--is); box-shadow: inset 0 -2px 0 var(--bla); }
.bu-tabell-fot { margin-top: 32px; display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--spalt); row-gap: 20px; align-items: end; }
.bu-bransle { --kol: 3; grid-column: 1 / span 7; }
.bu-tabell-fot .fotnot { grid-column: 9 / span 4; }

/* ---------- 04 konstruktion och drift ---------- */
.bu-kon-rutnat { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--spalt); row-gap: 48px; align-items: center; }
.bu-kon-bild { grid-column: 1 / span 7; position: relative; margin: 0; max-width: 820px; }
.bu-kon-bild img { display: block; width: 100%; height: auto; filter: drop-shadow(0 30px 40px rgba(0, 0, 0, .55)); }
.bu-kon-delar { grid-column: 9 / span 4; }
.bu-kon-delar > div { grid-template-columns: minmax(0, 1fr); row-gap: 6px; }
.bu-drift { margin-top: clamp(64px, 7vw, 120px); display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: clamp(32px, 5vw, 96px); row-gap: 48px; }
.bu-drift-kol .t-etikett { margin-bottom: 14px; }

/* ---------- 05 hela kedjan ---------- */
.bu-hall { position: relative; margin: 0 auto; max-width: 2000px; height: clamp(340px, 50vw, 900px); overflow: hidden; }   /* 2026-10-18: kranfotot, högre band så att brännaren syns hel */
.bu-hall img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 50% 52%;
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, #000 14%, #000 80%, transparent 100%), linear-gradient(90deg, transparent 0%, #000 7%, #000 93%, transparent 100%);
  -webkit-mask-composite: source-in;
  mask-image: linear-gradient(180deg, transparent 0%, #000 14%, #000 80%, transparent 100%), linear-gradient(90deg, transparent 0%, #000 7%, #000 93%, transparent 100%);
  mask-composite: intersect; }
.bu-kedjan { position: relative; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); column-gap: var(--spalt); margin-top: clamp(-80px, -4vw, -40px); padding-top: 34px; }
.bu-kedjan::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, #1f74b8 0%, #9fb4c4 18%, #f29a3c 34%, #f2a24a 52%, #9fb4c4 68%, #f29a3c 88%, #ffd7a0 100%); }
.bu-kedjan li { position: relative; }
.bu-kedjan li::before { content: ""; position: absolute; left: 0; top: -40px; width: 13px; height: 13px; border-radius: 50%; background: var(--natt); box-shadow: inset 0 0 0 2px #a9c6ee; }
.bu-kedjan li.varm::before { box-shadow: inset 0 0 0 2px #f6a650, 0 0 14px rgba(242, 154, 60, .6); }
.bu-kedjan h3 { margin-top: 10px; font-size: clamp(1.375rem, 1.1rem + .75vw, 2rem); line-height: 1.1; font-weight: 300; letter-spacing: -.016em; font-variation-settings: "opsz" 40; }
.bu-kedjan p { margin-top: 10px; font-size: 1rem; line-height: 1.5; color: var(--is-2); max-width: 24ch; }
.bu-anv { margin-top: clamp(64px, 7vw, 112px); }
.bu-anv ul { margin-top: 16px; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); column-gap: var(--spalt); row-gap: 28px; }
.bu-anv li { padding-top: 16px; border-top: 1px solid var(--linje-2); }
.bu-anv h3 { font-size: clamp(1.25rem, 1.1rem + .45vw, 1.625rem); line-height: 1.15; font-weight: 340; letter-spacing: -.012em; }
.bu-anv p { margin-top: 8px; font-size: 1rem; line-height: 1.5; color: var(--is-2); }
.bu-kort { margin-top: clamp(72px, 8vw, 128px); }
.bu-bwt { margin-top: 28px; max-width: 80ch; }

/* ---------- mellanstora skärmar ---------- */
@media (max-width: 1100px) {
  .bu-hjalte-h { grid-column: 1 / -1; }
  .bu-hjalte-data { grid-column: 1 / -1; --kol: 4; }

  .bu-delar { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bu-ringar { grid-column: 1 / span 5; }
  .bu-st-text { grid-column: 6 / span 7; }
  .bu-kon-bild, .bu-kon-delar { grid-column: 1 / -1; }
  .bu-kon-delar { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: var(--spalt); }
  .bu-kon-delar > div:nth-last-child(2) { border-bottom: 1px solid var(--linje); }
  .bu-bransle, .bu-tabell-fot .fotnot { grid-column: 1 / -1; }
  .bu-kedjan { grid-template-columns: repeat(3, minmax(0, 1fr)); row-gap: 56px; }
  .bu-anv ul { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
  .bu-ringar, .bu-st-text { grid-column: 1 / -1; }
  .bu-ringar { max-width: 440px; }
  .bu-drift { grid-template-columns: 1fr; }
}

/* ---------- mobil ---------- */
@media (max-width: 760px) {
  .bu-hjalte { padding-top: 104px; }
  .bu-dock { margin-top: 20px; }
  .bu-dock-yta { width: 150vw; }
  .bu-dock-etikett { font-size: .6875rem; }
  .bu-dock-etikett::before { width: 18px; margin-right: 8px; }
  .bu-dock-etikett.panna { left: auto; right: calc(50vw + 2 * var(--marg)); top: -6%; }
  .bu-dock-etikett.bu { display: none; }
  .bu-hjalte-v .t-h1 { font-size: 3.25rem; margin-top: 18px; }
  .bu-hjalte-h .t-ingress { font-size: 1.1875rem; }
  .bu-knappar { flex-direction: column; align-items: stretch; gap: 20px; margin-top: 28px; }
  .bu-knappar .knapp { width: 100%; }
  .bu-knappar .lank { justify-content: center; }
  .bu-data, .bu-hjalte-data, .bu-st-data, .bu-bransle { --kol: 1; row-gap: 0; }
  .bu-data > div { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; padding: 13px 0 14px; }
  .bu-data > div:last-child { border-bottom: 1px solid var(--linje); }
  .bu-data dd { margin: 0; text-align: right; font-size: 1.0625rem; }
  .bu-fe-val { gap: 20px; }
  .bu-fe-val button { font-size: 1.25rem; flex: 1 1 0; }
  .bu-fe-bild { margin-inline: calc(-1 * var(--marg)); }
  .bu-fe-etikett { font-size: .5625rem; letter-spacing: .12em; }
  .bu-fe-etikett.e-bu { top: 30%; }
  .bu-fe-tabell, .bu-fe-tabell tbody, .bu-fe-tabell tr, .bu-fe-tabell th, .bu-fe-tabell td { display: block; width: auto; }
  .bu-fe-tabell thead { display: none; }
  .bu-fe-tabell tr { padding: 4px 0 18px; }
  .bu-fe-tabell tr + tr { margin-top: 18px; }
  .bu-fe-tabell tbody th { padding: 0 0 12px; font-size: 1.625rem; border-bottom: 1px solid var(--linje-2); }
  .bu-fe-tabell td { display: flex; justify-content: space-between; gap: 16px; padding: 12px 0 13px; font-size: 1rem; text-align: right; }
  .bu-fe-tabell td::before { content: attr(data-etikett); flex: none; text-align: left; font-size: .75rem; line-height: 1.9; font-weight: 600; font-stretch: 80%; letter-spacing: .16em; text-transform: uppercase; color: var(--is-3); }
  .bu-fe-tabell td small { text-align: right; }
  .bu-fe-tabell td.tom { display: none; }
  .bu-snitt { padding-right: 0; margin-inline: calc(-1 * var(--marg) / 2); }
  .bu-snitt-ut { display: none; }
  .bu-pt { width: 24px; height: 24px; margin: -12px 0 0 -12px; font-size: .6875rem; }
  .bu-delar { grid-template-columns: 1fr; row-gap: 0; }
  .bu-delar li { padding: 14px 0 16px; }
  .bu-delar li:last-child { border-bottom: 1px solid var(--linje); }
  .bu-ringar { max-width: 320px; }
  .bu-st-val { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 2px; }
  .bu-st-val::before { display: none; }
  .bu-st-val button { min-width: 0; font-size: 1.125rem; }
  .bu-st-namn { font-size: 4.25rem; }
  .bu-tabell { min-width: 720px; }
  .bu-tabell th, .bu-tabell td { padding: 10px 8px; font-size: .875rem; }
  .bu-tabell th:first-child, .bu-tabell td:first-child { padding-right: 12px; }
  .bu-tabell-wrap { margin-right: calc(-1 * var(--marg)); }
  .bu-rader > div { grid-template-columns: 1fr; row-gap: 4px; }
  .bu-kon-delar { grid-template-columns: 1fr; }
  .bu-kon-delar > div:nth-last-child(2) { border-bottom: 0; }
  .bu-kon-bild { margin-inline: calc(-1 * var(--marg) / 2); }
  .bu-hall { height: 340px; }
  .bu-hall img { object-position: 50% 55%; }
  .bu-kedjan { grid-template-columns: 1fr; row-gap: 0; margin-top: -24px; padding-top: 0; padding-left: 30px; }
  .bu-kedjan::before { left: 6px; right: auto; top: 18px; bottom: 30px; width: 2px; height: auto; background: linear-gradient(180deg, #1f74b8 0%, #9fb4c4 14%, #f29a3c 30%, #f2a24a 50%, #9fb4c4 66%, #f29a3c 86%, #ffd7a0 100%); }
  .bu-kedjan li { padding: 14px 0 18px; }
  .bu-kedjan li::before { left: -30px; top: 16px; }
  .bu-anv ul { grid-template-columns: 1fr; row-gap: 0; }
  .bu-anv li { padding: 14px 0 16px; }
}
@media (prefers-reduced-motion: reduce) {
  .bu-ringar .vald, .bu-ringar .glod, .bu-ringar .matt { transition: none; }
}

/* engelska sidan (en/products/bu.html): broschyrlänken "(in Swedish)" något mindre på smala skärmar, så att den ryms på en rad */
@media (max-width: 760px) { html[lang="en"] .bu-knappar .lank { font-size: .9375rem; } html[lang="en"] .bu-knappar .bu-pdf { font-size: .8125rem; } }