/* Air-Product Norge AS – «Arbeidstegningen»
   Alle farger og fonter er definert her. Ingen farger hardkodes utenfor :root. */
:root {
  --color-bg: #F2F0EB;
  --color-surface: #FBFAF7;
  --color-text: #141517;
  --color-text-muted: #55585C;
  --color-accent: #C8202B;
  --color-accent-muted: #F4DCD9;
  --font-display: 'Archivo', 'Arial Narrow', sans-serif;
  --font-body: 'IBM Plex Sans', 'Helvetica Neue', Arial, sans-serif;

  --color-accent-strong: #A5161F;
  --color-accent-bright: #F0666D;
  --color-line: #CFCAC0;
  --color-line-strong: #8D8A84;
  --color-grid: #E6E2D9;
  --color-night: #121315;
  --color-night-2: #1C1D20;
  --color-on-night: #F2F0EB;
  --color-on-night-muted: #A7A9AB;
  --color-night-line: #34363A;
  --color-supply: #2F6FA3;
  --color-supply-soft: #D5E2EE;
  --color-exhaust-soft: #F1D3D0;
  --color-white: #FFFFFF;
  --color-shade: #14151766;

  --header-h: 64px;
  --bar-h: 0px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

/* ---------- Grunnlag ---------- */
.site { overflow-wrap: break-word; background: var(--color-bg); color: var(--color-text); font-family: var(--font-body); line-height: 1.65; -webkit-text-size-adjust: 100%; text-rendering: optimizeLegibility; }
.is-locked, .is-locked .site { overflow: hidden; }
.font-wide { font-family: var(--font-display); font-stretch: 118%; }
.font-narrow { font-family: var(--font-display); font-stretch: 75%; }
.h-display { font-family: var(--font-display); font-stretch: 116%; font-weight: 800; line-height: .98; letter-spacing: -.015em; }
.label { font-family: var(--font-display); font-stretch: 78%; font-weight: 600; font-size: .8125rem; letter-spacing: .14em; text-transform: uppercase; line-height: 1.3; }
.tabular { font-variant-numeric: tabular-nums; }
.site :where(h1, h2, h3, blockquote p, summary, .menu-link) { hyphens: manual; text-wrap: balance; }
.site :where(p, li, dd) { text-wrap: pretty; }
.site .grid > *, .site .flex > * { min-width: 0; }
.lead { font-size: clamp(1.0625rem, 1rem + .35vw, 1.25rem); line-height: 1.6; }

.skip-link { position: absolute; left: 1rem; top: -4rem; z-index: 100; background: var(--color-text); color: var(--color-bg); padding: .75rem 1rem; transition: top .2s var(--ease); }
.skip-link:focus { top: .75rem; }

:where(a, button, input, textarea, select, summary, [tabindex]):focus-visible { outline: 3px solid var(--color-accent); outline-offset: 3px; }
.on-night :where(a, button, [tabindex]):focus-visible { outline-color: var(--color-accent-bright); }

/* Papirrutenett (tegneark) */
.sheet-grid { background-color: var(--color-bg); background-image: linear-gradient(var(--color-grid) 1px, transparent 1px), linear-gradient(90deg, var(--color-grid) 1px, transparent 1px); background-size: 32px 32px; background-position: -1px -1px; }

/* ---------- Knapper ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .6rem; min-height: 52px; padding: .8rem 1.35rem; font-family: var(--font-display); font-stretch: 100%; font-weight: 700; font-size: 1rem; letter-spacing: .01em; border: 2px solid transparent; transition: background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease); cursor: pointer; text-decoration: none; }
.btn svg { width: 1.15em; height: 1.15em; flex: none; transition: transform .25s var(--ease); }
.btn-primary { background: var(--color-accent); color: var(--color-white); }
.btn-primary:hover { background: var(--color-accent-strong); }
.btn-primary:hover svg.lucide-arrow-right, .btn-primary:hover svg.lucide-arrow-down-right { transform: translateX(3px); }
.btn-ghost { background: transparent; color: var(--color-text); border-color: var(--color-text); }
.btn-ghost:hover { background: var(--color-text); color: var(--color-bg); }
.on-night .btn-ghost { color: var(--color-on-night); border-color: var(--color-on-night); }
.on-night .btn-ghost:hover { background: var(--color-on-night); color: var(--color-night); }
.btn:active { transform: translateY(1px); }

.link-arrow { display: inline-flex; align-items: center; gap: .4rem; min-height: 44px; font-weight: 600; text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: .25em; transition: color .2s var(--ease), text-decoration-color .2s var(--ease); }
.link-arrow:hover { color: var(--color-accent); text-decoration-thickness: 2px; }
.link-arrow svg { width: 1.1em; height: 1.1em; transition: transform .25s var(--ease); }
.link-arrow:hover svg { transform: translateX(3px); }
.on-night .link-arrow:hover { color: var(--color-accent-bright); }

/* ---------- Header ---------- */
.site-header { position: sticky; top: 0; z-index: 40; background: var(--color-bg); border-bottom: 1px solid var(--color-line); height: var(--header-h); }
.nav-link { position: relative; display: inline-flex; align-items: center; min-height: 44px; font-weight: 500; transition: color .2s var(--ease); }
.nav-link::after { content: ""; position: absolute; left: 0; right: 0; bottom: 8px; height: 2px; background: var(--color-accent); transform: scaleX(0); transform-origin: left; transition: transform .25s var(--ease); }
.nav-link:hover { color: var(--color-accent); }
.nav-link:hover::after, .nav-link[aria-current="page"]::after { transform: scaleX(1); }
.icon-btn { display: inline-flex; align-items: center; justify-content: center; width: 48px; height: 48px; border: 1.5px solid var(--color-text); background: transparent; color: var(--color-text); transition: background-color .2s var(--ease), color .2s var(--ease); }
.icon-btn:hover { background: var(--color-text); color: var(--color-bg); }
.icon-btn svg { width: 22px; height: 22px; }
.wordmark { font-family: var(--font-display); font-weight: 800; font-stretch: 122%; letter-spacing: -.01em; line-height: 1; }
.wordmark-dot { display: inline-block; width: .42em; height: .42em; background: var(--color-accent); margin-left: .12em; vertical-align: baseline; }

/* ---------- Scroll-animasjon (KUN .reveal, jf. AGENTS.md) ---------- */
.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity .4s var(--ease), transform .4s var(--ease); }
.js .reveal.is-visible { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: .06s; }
.reveal[data-delay="2"] { transition-delay: .12s; }
.reveal[data-delay="3"] { transition-delay: .18s; }
.reveal[data-delay="4"] { transition-delay: .24s; }
.reveal[data-delay="5"] { transition-delay: .3s; }

/* ---------- Helt: tegneark ---------- */
.hero-sheet { position: relative; border: 1.5px solid var(--color-text); background: var(--color-surface); }
.coord { position: absolute; font-family: var(--font-display); font-stretch: 75%; font-size: .75rem; letter-spacing: .1em; color: var(--color-text-muted); }
.plate { position: relative; background: var(--color-night); overflow: hidden; }
.plate img { display: block; width: 100%; height: 100%; object-fit: cover; }
.plate-cap { position: absolute; left: 0; bottom: 0; background: var(--color-night); color: var(--color-on-night); padding: .4rem .6rem; }
.title-block { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1.5px solid var(--color-text); }
.title-block > div { padding: .6rem .75rem; border-right: 1px solid var(--color-line-strong); border-bottom: 1px solid var(--color-line-strong); min-width: 0; }
.title-block dt { font-family: var(--font-display); font-stretch: 75%; font-size: .75rem; letter-spacing: .12em; text-transform: uppercase; color: var(--color-text-muted); }
.title-block dd { font-weight: 600; font-size: .9375rem; line-height: 1.35; }

/* ---------- Faner / segmentert valg ---------- */
.segmented { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; border: 1.5px solid var(--color-text); }
.segmented [role="tab"] { min-height: 52px; padding: .5rem .75rem; font-family: var(--font-display); font-weight: 700; font-stretch: 95%; font-size: .9375rem; line-height: 1.2; background: transparent; color: var(--color-text); transition: background-color .2s var(--ease), color .2s var(--ease); }
.segmented [role="tab"] + [role="tab"] { border-left: 1.5px solid var(--color-text); }
.segmented [role="tab"][aria-selected="true"] { background: var(--color-text); color: var(--color-bg); }
.segmented [role="tab"]:not([aria-selected="true"]):hover { background: var(--color-accent-muted); }

.check-list li { position: relative; padding-left: 1.75rem; }
.check-list li::before { content: ""; position: absolute; left: 0; top: .6em; width: .9rem; height: 2px; background: var(--color-accent); }

/* ---------- Byggsnittet ---------- */
.snitt-frame { position: relative; border: 1.5px solid var(--color-text); background: var(--color-surface); }
.snitt-svg { display: block; width: 100%; height: auto; aspect-ratio: 1200 / 720; }
.snitt-svg .wall { fill: none; stroke: var(--color-text); stroke-width: 6; stroke-linecap: square; }
.snitt-svg .slab { fill: none; stroke: var(--color-text); stroke-width: 5; }
.snitt-svg .thin { fill: none; stroke: var(--color-text); stroke-width: 2; }
.snitt-svg .hair { fill: none; stroke: var(--color-line-strong); stroke-width: 1.25; }
.snitt-svg .ground-hatch { stroke: var(--color-line-strong); stroke-width: 1.25; }
.snitt-svg .unit { fill: var(--color-surface); stroke: var(--color-text); stroke-width: 2.5; }
.snitt-svg .unit-fill { fill: var(--color-grid); stroke: var(--color-text); stroke-width: 2; }
.snitt-svg .duct-supply { fill: none; stroke: var(--color-supply-soft); stroke-width: 14; stroke-linecap: butt; stroke-linejoin: miter; }
.snitt-svg .duct-exhaust { fill: none; stroke: var(--color-exhaust-soft); stroke-width: 14; stroke-linecap: butt; stroke-linejoin: miter; }
.snitt-svg .flow { fill: none; stroke-width: 3; stroke-dasharray: 8 14; stroke-linecap: round; stroke-linejoin: round; animation: flow 1.4s linear infinite; }
.snitt-svg .flow-supply { stroke: var(--color-supply); }
.snitt-svg .flow-exhaust { stroke: var(--color-accent); }
.snitt-svg .flow-curtain { stroke: var(--color-supply); stroke-dasharray: 5 9; animation-duration: .9s; }
.snitt-svg .flow-cold { stroke: var(--color-line-strong); stroke-width: 2.5; stroke-dasharray: 4 10; animation-duration: 2.2s; }
.snitt-svg .room-label { font-family: var(--font-display); font-stretch: 78%; font-weight: 600; font-size: 17px; letter-spacing: .14em; fill: var(--color-text-muted); }
.snitt-svg .dim-text { font-family: var(--font-display); font-stretch: 78%; font-weight: 600; font-size: 16px; letter-spacing: .1em; fill: var(--color-text); }
.snitt-svg .hot { cursor: pointer; }
.snitt-svg .hot-ring { fill: var(--color-accent-muted); stroke: var(--color-accent); stroke-width: 2; transform-box: fill-box; transform-origin: center; animation: pulse 2.4s var(--ease) infinite; }
.snitt-svg .hot-dot { fill: var(--color-accent); stroke: var(--color-surface); stroke-width: 3; transition: fill .2s var(--ease); }
.snitt-svg .hot-num { font-family: var(--font-display); font-weight: 800; font-size: 17px; fill: var(--color-white); text-anchor: middle; dominant-baseline: central; pointer-events: none; }
.snitt-svg .hot:hover .hot-dot { fill: var(--color-accent-strong); }
.snitt-svg .hot.is-active .hot-dot { fill: var(--color-text); }
.snitt-svg .hot.is-active .hot-ring { fill: var(--color-grid); stroke: var(--color-text); animation: none; }
@keyframes flow { to { stroke-dashoffset: -44; } }
@keyframes pulse { 0%, 100% { transform: scale(1); opacity: .9; } 50% { transform: scale(1.35); opacity: .35; } }

.zone-tabs { display: flex; gap: .5rem; }
.zone-tab { display: inline-flex; align-items: center; gap: .5rem; min-height: 48px; padding: .45rem .9rem .45rem .5rem; border: 1.5px solid var(--color-text); background: var(--color-surface); font-family: var(--font-display); font-weight: 700; font-stretch: 92%; font-size: .9375rem; white-space: nowrap; transition: background-color .2s var(--ease), color .2s var(--ease); }
.zone-tab .num { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: var(--color-accent); color: var(--color-white); font-size: .8125rem; }
.zone-tab:hover { background: var(--color-accent-muted); }
.zone-tab[aria-selected="true"] { background: var(--color-text); color: var(--color-bg); }
.zone-tab[aria-selected="true"] .num { background: var(--color-bg); color: var(--color-text); }

.datasheet { border: 1.5px solid var(--color-text); background: var(--color-surface); }
.datasheet dl > div { display: grid; grid-template-columns: minmax(0, 6.5rem) minmax(0, 1fr); gap: .75rem; padding: .7rem 0; border-top: 1px solid var(--color-line); }
.datasheet dt { font-family: var(--font-display); font-stretch: 75%; font-weight: 600; font-size: .8125rem; letter-spacing: .12em; text-transform: uppercase; color: var(--color-text-muted); padding-top: .15em; }
.ds-img { background: var(--color-white); border-bottom: 1.5px solid var(--color-text); display: grid; place-items: center; }
.ds-img img { width: auto; max-width: 100%; height: 100%; object-fit: contain; }
.ph { display: grid; place-items: center; text-align: center; padding: 1rem; border: 1.5px dashed var(--color-line-strong); color: var(--color-text-muted); font-size: .875rem; line-height: 1.45; background: var(--color-bg); }

.legend-swatch { display: inline-block; width: 28px; height: 4px; vertical-align: middle; margin-right: .4rem; }
.legend-supply { background: var(--color-supply); }
.legend-exhaust { background: var(--color-accent); }

/* ---------- Mørk seksjon ---------- */
.on-night { background: var(--color-night); color: var(--color-on-night); }
.brand-card { border: 1px solid var(--color-night-line); background: var(--color-night-2); transition: border-color .25s var(--ease), background-color .25s var(--ease); }
.brand-card:hover, .brand-card:focus-within { border-color: var(--color-on-night-muted); }
.brand-card .brand-name { font-family: var(--font-display); font-weight: 800; font-stretch: 120%; line-height: 1; letter-spacing: -.01em; }
.text-night-muted { color: var(--color-on-night-muted); }

/* Produsentlogoer: hvite på mørk bakgrunn, originalfarger på lys */
.brand-logo { display: block; width: auto; max-width: 100%; height: 32px; filter: brightness(0) invert(1); opacity: .9; transition: opacity .2s var(--ease); }
.brand-card:hover .brand-logo, .brand-card:focus-within .brand-logo, .partner-link:hover .brand-logo { opacity: 1; }
.brand-logo--rosenberg { height: 46px; }
.brand-logo--salda { height: 28px; }
.brand-logo--airtecnics { height: 36px; }
.brand-logo--tovenco { height: 26px; }
.brand-logo--instell { height: 26px; }
.brand-logo--color { filter: none; opacity: 1; }
.partner-strip { border-color: var(--color-night-line); }
.partner-link span { transition: color .2s var(--ease); }
.partner-link:hover span { color: var(--color-on-night); }

/* Produktbilder i datablad */
.ds-img.ds-contain { background: var(--color-white); }
.ds-img.ds-contain img { object-fit: contain; padding: .5rem; }
.ds-img.ds-cover img { object-fit: cover; }
.photo-credit { font-size: .75rem; color: var(--color-text-muted); }
.rule-night { border-color: var(--color-night-line); }

/* ---------- Arbeidsgang ---------- */
.step-num { font-family: var(--font-display); font-weight: 800; font-stretch: 120%; color: var(--color-accent); }

/* ---------- Spørsmål og svar ---------- */
.faq details { border-top: 1.5px solid var(--color-text); }
.faq details:last-child { border-bottom: 1.5px solid var(--color-text); }
.faq summary { display: flex; justify-content: space-between; align-items: center; gap: 1rem; min-height: 60px; padding: .9rem 0; cursor: pointer; font-family: var(--font-display); font-weight: 700; font-stretch: 100%; font-size: 1.0625rem; line-height: 1.3; list-style: none; transition: color .2s var(--ease); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { color: var(--color-accent); }
.faq summary .plus { flex: none; width: 28px; height: 28px; position: relative; }
.faq summary .plus::before, .faq summary .plus::after { content: ""; position: absolute; left: 50%; top: 50%; width: 16px; height: 2px; background: currentColor; transform: translate(-50%, -50%); transition: transform .25s var(--ease); }
.faq summary .plus::after { transform: translate(-50%, -50%) rotate(90deg); }
.faq details[open] summary .plus::after { transform: translate(-50%, -50%) rotate(0deg); }

.more summary { display: inline-flex; align-items: center; gap: .4rem; min-height: 44px; cursor: pointer; font-weight: 600; text-decoration: underline; text-underline-offset: .25em; list-style: none; transition: color .2s var(--ease); }
.more summary::-webkit-details-marker { display: none; }
.more summary:hover { color: var(--color-accent); }
.more[open] summary .more-open { display: none; }
.more:not([open]) summary .more-close { display: none; }

/* ---------- Skjema ---------- */
.field-label { display: block; font-weight: 600; font-size: .9375rem; margin-bottom: .35rem; }
.field-hint { font-weight: 400; color: var(--color-text-muted); }
.field { width: 100%; min-height: 52px; padding: .75rem .9rem; font-size: 1rem; font-family: var(--font-body); color: var(--color-text); background: var(--color-white); border: 1.5px solid var(--color-line-strong); border-radius: 0; transition: border-color .2s var(--ease), box-shadow .2s var(--ease); }
.field:hover { border-color: var(--color-text); }
.field:focus { outline: none; border-color: var(--color-text); box-shadow: 0 0 0 3px var(--color-accent-muted); }
textarea.field { min-height: 132px; resize: vertical; line-height: 1.5; }
.field[aria-invalid="true"] { border-color: var(--color-accent); }
.field-error { display: flex; gap: .35rem; align-items: center; color: var(--color-accent-strong); font-size: .875rem; font-weight: 600; margin-top: .35rem; }
.field-error[hidden] { display: none; }
.chip-radio { position: relative; }
.chip-radio input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.chip-radio span { display: inline-flex; align-items: center; min-height: 48px; padding: .5rem 1rem; border: 1.5px solid var(--color-line-strong); background: var(--color-white); font-weight: 600; cursor: pointer; transition: background-color .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease); }
.chip-radio span:hover { border-color: var(--color-text); }
.chip-radio input:checked + span { background: var(--color-text); border-color: var(--color-text); color: var(--color-bg); }
.chip-radio input:focus-visible + span { outline: 3px solid var(--color-accent); outline-offset: 2px; }
.gjelder-chip { display: inline-flex; align-items: center; gap: .5rem; padding: .35rem .35rem .35rem .75rem; background: var(--color-accent-muted); font-weight: 600; font-size: .9375rem; }
.gjelder-chip[hidden] { display: none; }
.gjelder-chip button { display: inline-grid; place-items: center; width: 36px; height: 36px; transition: background-color .2s var(--ease); }
.gjelder-chip button:hover { background: var(--color-surface); }
.success-message { padding: 1.5rem; border: 1.5px solid var(--color-text); background: var(--color-surface); font-family: var(--font-display); font-weight: 700; font-size: 1.25rem; }

.form-shell { background: var(--color-surface); border: 1.5px solid var(--color-text); }
.takeover-head { display: none; }
.form-progress, .progress-bar, .form-launch, .step-next, .step-back { display: none; }

/* ---------- Takeover (meny) ---------- */
.menu-takeover { position: fixed; inset: 0; z-index: 70; background: var(--color-bg); display: none; flex-direction: column; height: 100dvh; overflow-y: auto; overscroll-behavior: contain; }
.menu-takeover.is-open { display: flex; animation: takeover-in .28s var(--ease); }
.menu-link { display: flex; justify-content: space-between; align-items: center; min-height: 64px; border-bottom: 1px solid var(--color-line); font-family: var(--font-display); font-weight: 800; font-stretch: 115%; font-size: 1.625rem; transition: color .2s var(--ease), padding .2s var(--ease); }
.menu-link:hover { color: var(--color-accent); padding-left: .25rem; }
@keyframes takeover-in { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }

/* ---------- Karusell (mobil) ---------- */
.carousel-count { font-family: var(--font-display); font-stretch: 80%; font-weight: 700; letter-spacing: .1em; }

/* ---------- Fast handlingsfelt ---------- */
.action-bar { display: none; }

/* ---------- Bunntekst ---------- */
.site-footer a:not(.btn) { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: .2em; transition: color .2s var(--ease); }
.site-footer a:not(.btn):hover { color: var(--color-accent-bright); }

/* ---------- Produkter ---------- */
.family { border-top: 1.5px solid var(--color-text); }
.family-img { background: var(--color-white); border: 1px solid var(--color-line); display: grid; place-items: center; overflow: hidden; }
.family-img img { max-width: 100%; max-height: 100%; width: auto; height: auto; object-fit: contain; }
.jump-chip { display: inline-flex; align-items: center; min-height: 44px; padding: .4rem 1rem; border: 1.5px solid var(--color-text); font-family: var(--font-display); font-weight: 700; font-stretch: 100%; white-space: nowrap; background: var(--color-bg); transition: background-color .2s var(--ease), color .2s var(--ease); }
.jump-scroller { overflow-x: auto; scrollbar-width: none; }
.jump-scroller::-webkit-scrollbar { display: none; }
.jump-scroller ul { width: max-content; }
.jump-chip:hover { background: var(--color-text); color: var(--color-bg); }

.zone-tabs { flex-wrap: wrap; }

/* ================= MOBIL (fase 6) ================= */
@media (max-width: 767px) {
  :root { --header-h: 60px; --bar-h: 76px; }

  /* Heltedel: kompakt tittelfelt */
  .title-block { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .title-block > div { padding: .5rem .6rem; }
  .title-block .tb-hide-sm { display: none; }
  .title-block dd { font-size: .875rem; }

  /* To veier inn: segmentert valg */
  [data-panel-of="veier"][data-inactive] { display: none; }

  /* Byggsnittet: zoom per sone, velger i tommelsonen */
  .snitt-svg { aspect-ratio: 1160 / 640; }
  .snitt-svg.is-overview .hot { transform: scale(2.6); transform-box: fill-box; transform-origin: center; }
  .snitt-svg .hot { transition: transform .3s var(--ease); }
  .snitt-svg.is-overview .room-labels, .snitt-svg.is-overview .dim-text { display: none; }
  .zone-scroller { overflow-x: auto; margin: 0 -1rem; padding: .25rem 1rem .5rem; scroll-snap-type: x proximity; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
  .zone-scroller::-webkit-scrollbar { display: none; }
  .zone-tabs { flex-wrap: nowrap; width: max-content; }
  .zone-tab { scroll-snap-align: center; }
  .datasheet dl > div { grid-template-columns: minmax(0, 32%) minmax(0, 1fr); padding: .55rem 0; font-size: .9375rem; }

  /* Agenturer: karusell med scroll-snap */
  .carousel .carousel-track { display: flex; gap: .75rem; overflow-x: auto; scroll-snap-type: x mandatory; margin: 0 -1rem; padding: 0 1rem .25rem; scroll-padding: 0 1rem; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
  .carousel .carousel-track::-webkit-scrollbar { display: none; }
  .carousel .carousel-track > li { flex: 0 0 80%; scroll-snap-align: start; }

  /* Skjema: fullskjerms takeover i to steg */
  .form-launch { display: block; }
  .form-shell { display: none; }
  .form-shell.is-open { display: flex; flex-direction: column; position: fixed; inset: 0; z-index: 70; height: 100dvh; border: 0; background: var(--color-bg); animation: takeover-in .28s var(--ease); }
  .form-shell.is-open .takeover-head { display: flex; flex: none; background: var(--color-bg); }
  .form-shell.is-open .form-body { flex: 1; overflow-y: auto; overscroll-behavior: contain; padding-bottom: calc(1.5rem + env(safe-area-inset-bottom)); }
  .form-shell.is-open .form-progress { display: block; }
  .form-shell.is-open .progress-bar { display: block; height: 4px; background: var(--color-line); }
  .form-shell.is-open .progress-bar span { display: block; height: 100%; width: 50%; background: var(--color-accent); transition: width .3s var(--ease); }
  .form-shell.is-open[data-step-active="2"] .progress-bar span { width: 100%; }
  .form-shell.is-open .step-next, .form-shell.is-open .step-back { display: inline-flex; }
  .form-shell.is-open[data-step-active="1"] [data-step="2"], .form-shell.is-open[data-step-active="2"] [data-step="1"] { display: none; }
  .form-shell.is-open[data-step-active="done"] .form-progress, .form-shell.is-open[data-step-active="done"] .progress-bar { display: none; }

  /* Fast handlingsfelt */
  .action-bar { display: grid; grid-template-columns: auto minmax(0, 1fr); overflow: hidden; width: 100%; max-width: 100vw; gap: .5rem; position: fixed; left: 0; right: 0; bottom: 0; z-index: 50; padding: .6rem 1rem calc(.6rem + env(safe-area-inset-bottom)); background: var(--color-bg); border-top: 1.5px solid var(--color-text); transform: translateY(110%); visibility: hidden; transition: transform .3s var(--ease), visibility 0s linear .3s; }
  .action-bar.is-shown { transform: none; visibility: visible; transition: transform .3s var(--ease), visibility 0s; }
  .action-bar .btn { min-height: 52px; min-width: 0; padding-left: .75rem; padding-right: .75rem; text-align: center; line-height: 1.2; }
  .form-shell.is-open .step-back { padding-left: .9rem; padding-right: .9rem; }
  .form-shell.is-open [type="submit"] { white-space: nowrap; padding-left: 1rem; padding-right: 1rem; }

  .faq summary { font-size: 1rem; min-height: 56px; }
}

/* ---------- Redusert bevegelse ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms; animation-iteration-count: 1; transition-duration: .01ms; scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; }
  .snitt-svg .flow, .snitt-svg .hot-ring { animation: none; }
  .menu-takeover.is-open, .form-shell.is-open { animation: none; }
  .btn, .btn svg, .link-arrow svg, .nav-link::after, .action-bar, .snitt-svg .hot { transition: none; }
}
.brand-logo--lg.brand-logo--rosenberg { height: 64px; }
.brand-logo--lg.brand-logo--salda { height: 32px; }
.brand-logo--lg.brand-logo--airtecnics { height: 52px; }
.brand-logo--lg.brand-logo--tovenco { height: 38px; }

/* Strektegninger i databladene (samme språk som byggsnittet) */
.ds-illu-wrap { display: block; padding: .75rem 1rem; border-bottom: 1.5px solid var(--color-text); }
.snitt-svg.ds-illu { display: block; aspect-ratio: 2 / 1; width: 100%; height: auto; max-height: 11rem; margin: 0 auto; }
.ds-illu .ln, .ds-illu .ln-sm, .ds-illu .ln-thick { fill: none; stroke: var(--color-text); stroke-linejoin: round; }
.ds-illu .ln { stroke-width: 2.5; }
.ds-illu .ln-sm { stroke-width: 2; }
.ds-illu .ln-thick { stroke-width: 4; }
.ds-illu .box { fill: var(--color-surface); stroke: var(--color-text); stroke-width: 2.5; stroke-linejoin: round; }
.ds-illu .box-fill { fill: var(--color-grid); stroke: var(--color-text); stroke-width: 2; }
.ds-illu .duct-supply, .ds-illu .duct-exhaust { stroke-width: 12; }
.ds-illu .ill-label { font-family: var(--font-display); font-stretch: 78%; font-weight: 600; font-size: 15px; letter-spacing: .12em; fill: var(--color-text-muted); }
.ds-illu .spin { animation: spin 3s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .ds-illu .spin { animation: none; } }

/* Byggsnittet: datablad som takeover på mobil */
.sheet-head, .sheet-nav { display: none; }
@media (max-width: 767px) {
  .snitt-sheet { display: none; }
  .snitt-sheet.is-open { display: flex; flex-direction: column; position: fixed; inset: 0; z-index: 70; height: 100dvh; background: var(--color-bg); animation: takeover-in .28s var(--ease); }
  .snitt-sheet.is-open .sheet-head { display: flex; flex: none; }
  .snitt-sheet.is-open .sheet-body { flex: 1; overflow-y: auto; overscroll-behavior: contain; padding: 1rem; }
  .snitt-sheet.is-open .sheet-nav { display: grid; grid-template-columns: 1fr 1fr; gap: .5rem; flex: none; padding: .75rem 1rem calc(.75rem + env(safe-area-inset-bottom)); border-top: 1.5px solid var(--color-text); background: var(--color-bg); }
  .snitt-sheet.is-open .sheet-nav .btn { padding-left: .75rem; padding-right: .75rem; }
  .snitt-sheet.is-open .datasheet.reveal { opacity: 1; transform: none; }
  .snitt-svg .hot { cursor: pointer; }
  .snitt-frame { touch-action: manipulation; }
  #zt-hele { display: none; }
}
@media (prefers-reduced-motion: reduce) { .snitt-sheet.is-open { animation: none; } }