/* HW Energieberatung · Entwurf 3
   Layout: Bauzeichnung. Der Gebäudeschnitt mit Positionsnummern ist der Einstieg,
   Monospace für Koten und Beschriftungen, Grün nur dort, wo es um Geld geht (Förderung). */
@font-face { font-family: 'Schibsted Grotesk'; font-style: normal; font-weight: 400 900; font-display: swap; src: url('fonts/schibsted-grotesk.woff2') format('woff2'); }
@font-face { font-family: 'Atkinson Hyperlegible Next'; font-style: normal; font-weight: 200 800; font-display: swap; src: url('fonts/atkinson-hyperlegible-next.woff2') format('woff2'); }
@font-face { font-family: 'IBM Plex Mono'; font-style: normal; font-weight: 500; font-display: swap; src: url('fonts/ibm-plex-mono.woff2') format('woff2'); }

:root {
    --paper: #F5F8F7;      /* Zeichenpapier, leicht kühl */
    --sheet: #FFFFFF;      /* Blatt, Karten */
    --tint: #EAF1F5;       /* abgesetzte Bereiche */
    --ink: #11283A;        /* Tusche, Text */
    --soft: #4A5D6C;       /* Nebentext */
    --line: #D3DDE4;       /* Haarlinien */
    --blue: #1866A3;       /* Logoblau, abgedunkelt für Kontrast */
    --blue-hi: #1A73B8;    /* Logoblau */
    --blue-wash: #DCEAF6;
    --green: #8CC63F;      /* Logogrün: nur Flächen und Marken */
    --green-ink: #3B6A12;  /* Grün als Text */
    --green-wash: #EAF5DC;
    --on-dark: #FFFFFF;
    --night: #11283A;      /* dunkle Flächen: Hauptleistung, Rechner-Ergebnis, Kontakt */
    --on-night: #F5F8F7;
    --warn-bg: #FFF4DE;
    --warn-line: #E9B44C;
    --error: #B3261E;
    --shadow: 0 1px 2px rgba(17,40,58,.06), 0 18px 48px -18px rgba(17,40,58,.28);

    --f-display: 'Schibsted Grotesk', 'Arial', system-ui, sans-serif;
    --f-body: 'Atkinson Hyperlegible Next', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
    --f-mono: 'IBM Plex Mono', ui-monospace, Consolas, monospace;

    --wrap: 1200px;
    --gutter: clamp(16px, 4vw, 40px);
    --r: 10px;
    color-scheme: light;
}
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --paper: #0B1A26; --sheet: #102536; --tint: #0E2131; --ink: #E4EDF3; --soft: #9FB2C1; --line: #22405A;
        --blue: #6DB5EA; --blue-hi: #6DB5EA; --blue-wash: #163A57; --green: #9BD35A; --green-ink: #A9DB6E; --green-wash: #1B3317;
        --on-dark: #0B1A26; --night: #17344D; --on-night: #E4EDF3; --warn-bg: #2E2614; --warn-line: #8A6A26; --error: #FF8A80;
        --shadow: 0 1px 2px rgba(0,0,0,.3), 0 18px 48px -18px rgba(0,0,0,.6);
        color-scheme: dark;
    }
}
:root[data-theme="dark"] {
    --paper: #0B1A26; --sheet: #102536; --tint: #0E2131; --ink: #E4EDF3; --soft: #9FB2C1; --line: #22405A;
    --blue: #6DB5EA; --blue-hi: #6DB5EA; --blue-wash: #163A57; --green: #9BD35A; --green-ink: #A9DB6E; --green-wash: #1B3317;
    --on-dark: #0B1A26; --night: #17344D; --on-night: #E4EDF3; --warn-bg: #2E2614; --warn-line: #8A6A26; --error: #FF8A80;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 18px 48px -18px rgba(0,0,0,.6);
    color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { background: var(--paper); scroll-behavior: smooth; scroll-padding-top: 84px; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--f-body); font-size: 18px; line-height: 1.6; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; }
::selection { background: var(--blue-wash); color: var(--ink); }
input, textarea { caret-color: var(--blue); }
a { color: var(--blue); text-underline-offset: 3px; }
h1, h2, h3, h4 { font-family: var(--f-display); font-weight: 750; line-height: 1.08; letter-spacing: -0.02em; margin: 0 0 .45em; text-wrap: balance; }
h2 { font-size: clamp(1.9rem, 3.6vw, 2.75rem); }
h3 { font-size: 1.3rem; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }
:focus-visible { outline: 3px solid var(--blue-hi); outline-offset: 3px; border-radius: 4px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation: none !important; transition: none !important; } }

.wrap { max-width: var(--wrap); margin: 0 auto; padding-inline: var(--gutter); }
.ico { width: 1em; height: 1em; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; vertical-align: -0.125em; flex-shrink: 0; }
.label { font-family: var(--f-mono); font-size: .74rem; font-weight: 500; letter-spacing: .09em; text-transform: uppercase; color: var(--blue); }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--paper); padding: 10px 16px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 50px; padding: 12px 22px; border-radius: var(--r); border: 1.5px solid var(--blue); background: var(--blue); color: var(--on-dark); font: 700 1.02rem/1.2 var(--f-body); text-decoration: none; cursor: pointer; transition: filter .15s, background .15s, transform .15s; }
.btn:hover { filter: brightness(1.08); }
.btn:active { transform: translateY(1px); }
.btn-line { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-line:hover { background: var(--sheet); border-color: var(--ink); filter: none; }
.btn-green { background: var(--green); border-color: var(--green); color: #11283A; }
.btn-small { min-height: 42px; padding: 8px 16px; font-size: .95rem; }

/* Kopfzeile */
.top { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 40; background: color-mix(in srgb, var(--paper) 90%, transparent); backdrop-filter: saturate(150%) blur(10px); -webkit-backdrop-filter: saturate(150%) blur(10px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 20px; min-height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); margin-right: auto; min-width: 0; }
.brand img { width: 44px; height: 44px; border-radius: 50%; background: #fff; }
.brand b { display: block; font-family: var(--f-display); font-size: 1.08rem; line-height: 1.1; letter-spacing: -0.01em; }
.brand small { display: block; font-size: .78rem; color: var(--soft); }
.nav { display: flex; gap: 2px; }
.nav a { color: var(--soft); text-decoration: none; font-size: .95rem; font-weight: 600; padding: 8px 12px; border-radius: 8px; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); background: var(--tint); }
.top .btn { white-space: nowrap; }
.callbar { display: none; }
.menu-btn { display: none; order: 3; width: 48px; height: 48px; flex-shrink: 0; place-items: center; border: 1.5px solid var(--line); border-radius: var(--r); background: var(--sheet); color: var(--ink); cursor: pointer; }
.menu-btn .ico { width: 24px; height: 24px; grid-area: 1 / 1; }
.menu-btn .ico:last-child, .top.open .menu-btn .ico:first-child { display: none; }
.top.open .menu-btn .ico:last-child { display: block; }

/* Hero mit Gebäudeschnitt */
.hero { border-bottom: 1px solid var(--line);
    background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
    background-size: 40px 40px; background-position: -1px -1px;
    -webkit-mask-image: none; }
.hero > .wrap { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(28px, 4.5vw, 64px); align-items: center; padding-block: clamp(40px, 7vw, 88px); }
.hero-text { background: var(--paper); box-shadow: 0 0 0 24px var(--paper); border-radius: 2px; }
.hero h1 { font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 800; letter-spacing: -0.035em; margin-top: 0; }
.hero h1 em { font-style: normal; color: var(--blue); display: block; }
.lead { font-size: 1.14rem; color: var(--soft); max-width: 32em; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.hero .actions .btn:first-child { font-family: var(--f-mono); font-weight: 500; font-size: 1.08rem; letter-spacing: .01em; }
.trust { list-style: none; margin: 30px 0 0; padding: 22px 0 0; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 14px 26px; }
.trust li { display: flex; gap: 10px; align-items: flex-start; font-weight: 700; font-size: .95rem; line-height: 1.25; }
.trust .ico { color: var(--green-ink); width: 20px; height: 20px; margin-top: 1px; }
.trust small { display: block; font-weight: 400; color: var(--soft); font-size: .82rem; }

.sheet { margin: 0; background: var(--sheet); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); overflow: hidden; }
.sheet-bar { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding: 12px 18px; border-bottom: 1px solid var(--line); }
.sheet-bar .scale-note { color: var(--soft); }
.section { display: block; width: 100%; height: auto; padding: 8px 10px 0; }
.section .hatch { stroke: var(--blue); stroke-width: 1.2; opacity: .55; }
.section .hatch-soft { stroke: var(--soft); stroke-width: 1; opacity: .35; }
.section .ln-strong { stroke: var(--ink); stroke-width: 2.4; stroke-linejoin: round; }
.section .ln { stroke: var(--ink); stroke-width: 1.2; }
.section .wall { fill: var(--ink); opacity: .82; }
.section .ins { fill: url(#hatch-ins); stroke: var(--blue); stroke-width: 1; }
.section .ins-line { stroke: var(--blue); stroke-width: 6; opacity: .25; }
.section .win { fill: var(--sheet); stroke: var(--ink); stroke-width: 1.2; }
.section .unit { fill: var(--tint); stroke: var(--ink); stroke-width: 1.4; }
.section .unit-new { stroke-dasharray: 4 3; }
.section .pipe { stroke: var(--soft); stroke-width: 2; fill: none; }
.section .plan-frame { fill: none; stroke: var(--soft); stroke-width: 1.2; stroke-dasharray: 6 5; }
.section .t-mono { font: 500 11px var(--f-mono); fill: var(--soft); }
.section .t-small { font: 500 10px var(--f-mono); fill: var(--soft); }
.section .leader { stroke: var(--ink); stroke-width: 1; }
.section .pin { cursor: pointer; }
.section .pin circle { fill: var(--sheet); stroke: var(--ink); stroke-width: 1.6; transition: fill .2s, stroke .2s; }
.section .pin text { font: 700 14px var(--f-mono); fill: var(--ink); pointer-events: none; }
.section .pin:hover circle { stroke: var(--blue); }
.section .pin.on circle { fill: var(--blue); stroke: var(--blue); }
.section .pin.on text { fill: var(--on-dark); }
.section .pin.on .leader { stroke: var(--blue); stroke-width: 1.6; }
.section .part { transition: opacity .25s; }
.section.has-sel .part { opacity: .35; }
.section.has-sel .part.on { opacity: 1; }
.section .part.on .ins, .section .part.on .win, .section .part.on .unit { stroke: var(--blue); stroke-width: 2.2; }
.section .part.on .plan-frame { stroke: var(--blue); stroke-width: 2; }
.section .part.on .unit { fill: var(--blue-wash); }
.positions { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); border-top: 1px solid var(--line); }
.positions button { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; min-height: 60px; padding: 8px 4px; border: 0; border-left: 1px solid var(--line); background: transparent; color: var(--soft); font: 600 .88rem/1.15 var(--f-body); cursor: pointer; }
.positions button:first-child { border-left: 0; }
.positions button b { font: 500 .78rem var(--f-mono); width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; border: 1.2px solid currentColor; }
.positions button:hover { color: var(--ink); background: var(--tint); }
.positions button[aria-selected="true"] { color: var(--blue); background: var(--blue-wash); }
.positions button[aria-selected="true"] b { background: var(--blue); border-color: var(--blue); color: var(--on-dark); }
.pos-detail { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 20px; padding: 18px 20px 20px; border-top: 1px solid var(--line); }
.pos-text h2 { font-size: 1.3rem; margin: 6px 0 4px; }
.pos-text p { margin: 0; font-size: .95rem; color: var(--soft); }
.pos-num { display: flex; flex-direction: column; justify-content: center; padding-left: 20px; border-left: 1px solid var(--line); }
.pos-num b { font: 800 2rem/1 var(--f-display); letter-spacing: -0.02em; color: var(--green-ink); font-variant-numeric: tabular-nums; }
.pos-num span { font-size: .84rem; color: var(--soft); margin: 6px 0 8px; line-height: 1.35; }
.pos-num a { font-weight: 700; font-size: .95rem; text-decoration: none; display: inline-flex; gap: 6px; align-items: center; min-height: 44px; align-self: flex-start; }

/* Logos */
.partners { border-bottom: 1px solid var(--line); background: var(--sheet); }
.partners .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: 18px 40px; padding-block: 22px; }
.partners .label { color: var(--soft); }
.logos { display: flex; flex-wrap: wrap; align-items: center; gap: 18px 40px; flex: 1; justify-content: space-between; }
.logos img { height: 30px; width: auto; filter: grayscale(1); opacity: .8; transition: filter .2s, opacity .2s; }
.logos img.tall { height: 42px; }
.logos img:hover { filter: none; opacity: 1; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .logos img { filter: grayscale(1) invert(1) brightness(1.4); opacity: .7; } }
:root[data-theme="dark"] .logos img { filter: grayscale(1) invert(1) brightness(1.4); opacity: .7; }

/* Abschnitte */
.sec { padding-block: clamp(56px, 8vw, 104px); }
.sec-tint { background: var(--tint); border-block: 1px solid var(--line); }
.head { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 16px 48px; align-items: end; margin-bottom: clamp(28px, 4vw, 48px); }
.head h2 { margin: 0; }
.head p { color: var(--soft); margin: 0; max-width: 34em; }
.head-stack h2 { margin: 0 0 12px; }
.head-stack p { color: var(--soft); }

/* Leistungen als Bento */
.bento { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 14px; }
.tile { grid-column: span 2; display: flex; flex-direction: column; padding: 24px; background: var(--sheet); border: 1px solid var(--line); border-radius: 14px; }
.tile-main { grid-column: span 2; grid-row: span 2; background: var(--night); color: var(--on-night); border-color: var(--night); }
.tile-main .label { color: var(--green); }
.tile.tile-main p, .tile.tile-main .figure span { color: color-mix(in srgb, var(--on-night) 78%, transparent); }
.tile h3 { margin: 10px 0 8px; }
.tile p { color: var(--soft); font-size: .97rem; margin: 0 0 18px; }
.tile .figure { margin-top: auto; padding-top: 16px; border-top: 1px solid var(--line); }
.tile-main .figure { border-color: color-mix(in srgb, var(--on-night) 20%, transparent); }
.figure b { display: block; font: 800 2.4rem/1 var(--f-display); letter-spacing: -0.03em; color: var(--green-ink); font-variant-numeric: tabular-nums; margin-bottom: 6px; }
.tile-main .figure b { color: var(--green); font-size: clamp(2.6rem, 4.4vw, 3.6rem); }
.figure span { display: block; font-size: .88rem; color: var(--soft); line-height: 1.4; }
.tile-small { grid-column: span 2; }
.tile-small p { margin: 0; }
.bento .tile:nth-child(4) { grid-column: 3 / span 2; }
.bento .tile:nth-child(5) { grid-column: 5 / span 2; }
.footnote { font-size: .86rem; color: var(--soft); margin: 18px 0 0; }

/* Förderrechner */
.calc { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); background: var(--sheet); border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow); overflow: hidden; }
.calc-in { padding: clamp(20px, 3vw, 34px); }
.calc-out { display: flex; flex-direction: column; gap: 14px; padding: clamp(20px, 3vw, 34px); background: var(--night); color: var(--on-night); }
.calc-out > div { display: flex; flex-direction: column; gap: 12px; flex: 1; }
.calc-out .label { color: var(--green); }
.sum { font: 800 clamp(2.8rem, 5vw, 3.8rem)/1 var(--f-display); letter-spacing: -0.03em; font-variant-numeric: tabular-nums; }
.bar { height: 14px; border-radius: 7px; background: color-mix(in srgb, var(--on-night) 18%, transparent); overflow: hidden; }
.bar i { display: block; height: 100%; width: 0; background: var(--green); border-radius: 7px; transition: width .35s cubic-bezier(.2,.7,.2,1); }
.rows { margin: 4px 0 0; }
.rows div { display: flex; justify-content: space-between; gap: 16px; padding: 10px 0; border-top: 1px solid color-mix(in srgb, var(--on-night) 18%, transparent); }
.rows dt { color: color-mix(in srgb, var(--on-night) 72%, transparent); font-size: .92rem; }
.rows dd { margin: 0; font: 500 1rem var(--f-mono); font-variant-numeric: tabular-nums; white-space: nowrap; }
.calc-out .btn { width: 100%; margin-top: auto; }
.tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; padding: 4px; background: var(--tint); border-radius: 12px; margin-bottom: 24px; }
.tab { min-height: 46px; border: 0; border-radius: 9px; background: transparent; color: var(--soft); font: 700 .98rem var(--f-body); cursor: pointer; }
.tab[aria-selected="true"] { background: var(--sheet); color: var(--ink); box-shadow: 0 1px 3px rgba(17,40,58,.14); }
.fld { display: block; margin-bottom: 16px; }
.fld > span { display: block; font-size: .92rem; font-weight: 700; margin-bottom: 6px; }
.fld > span.amount { display: flex; margin-bottom: 0; }
.fld > span.err { display: none; font-weight: 400; margin: 5px 0 0; }
.fld > .invalid + span.err { display: block; }
.opt { font-weight: 400; color: var(--soft); }
.amount { display: flex; align-items: center; border: 1.5px solid var(--line); border-radius: var(--r); background: var(--sheet); padding-right: 14px; }
.amount:focus-within { border-color: var(--blue); }
.amount input { border: 0; outline: 0; flex: 1; min-width: 0; padding: 12px 14px; font: 500 1.1rem var(--f-mono); background: transparent; color: var(--ink); }
.amount b { font-family: var(--f-mono); color: var(--soft); font-weight: 500; }
select, .inp, textarea { width: 100%; border: 1.5px solid var(--line); border-radius: var(--r); padding: 12px 14px; font: 400 1rem var(--f-body); color: var(--ink); background: var(--sheet); }
select:focus, .inp:focus, textarea:focus { outline: 0; border-color: var(--blue); }
.tick { display: flex; gap: 12px; align-items: flex-start; font-size: .96rem; margin: 12px 0; cursor: pointer; }
.tick input { width: 20px; height: 20px; margin: 2px 0 0; accent-color: var(--blue); flex-shrink: 0; }
.small { font-size: .86rem; color: var(--soft); }
.disclaimer { font-size: .84rem; color: var(--soft); margin: 18px 0 0; max-width: 62em; }
.stand { display: inline-block; font: 500 .72rem var(--f-mono); letter-spacing: .06em; text-transform: uppercase; color: var(--green-ink); background: var(--green-wash); padding: 3px 8px; border-radius: 6px; margin-right: 8px; }

/* Ablauf */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); counter-reset: s; }
.steps li { position: relative; counter-increment: s; padding: 52px 18px 0 0; }
.steps li::before { content: counter(s, decimal-leading-zero); position: absolute; top: 0; left: 0; width: 36px; height: 36px; display: grid; place-items: center; border-radius: 50%; border: 1.5px solid var(--ink); background: var(--paper); font: 500 .8rem var(--f-mono); z-index: 1; }
.steps li::after { content: ''; position: absolute; top: 18px; left: 36px; right: 0; height: 1.5px; background: var(--line); }
.steps li:last-child::after { display: none; }
.steps li.key::before { background: var(--green); border-color: var(--green); color: #11283A; }
.steps .who { font: 500 .72rem var(--f-mono); text-transform: uppercase; letter-spacing: .08em; color: var(--blue); }
.steps h3 { font-size: 1.15rem; margin: 6px 0 6px; }
.steps p { font-size: .94rem; color: var(--soft); margin: 0; }
.note { display: flex; gap: 14px; align-items: flex-start; margin-top: 40px; padding: 16px 20px; background: var(--warn-bg); border: 1px solid var(--warn-line); border-radius: 12px; }
.note .ico { width: 22px; height: 22px; margin-top: 2px; color: #9A6408; }
.note p { margin: 0; }

/* Über mich mit Datenblatt */
.me { display: grid; grid-template-columns: minmax(0, 320px) minmax(0, 1fr); gap: clamp(28px, 5vw, 64px); align-items: start; }
.portrait { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 14px; border: 1px solid var(--line); }
blockquote { margin: 12px 0 24px; font: 700 clamp(1.4rem, 2.6vw, 1.9rem)/1.25 var(--f-display); letter-spacing: -0.015em; text-wrap: balance; }
.datasheet { margin: 0 0 24px; border: 1px solid var(--line); border-radius: 12px; background: var(--sheet); overflow: hidden; }
.datasheet div { display: grid; grid-template-columns: minmax(0, 11em) minmax(0, 1fr); gap: 12px; padding: 10px 16px; border-top: 1px solid var(--line); }
.datasheet div:first-child { border-top: 0; }
.datasheet dt { font: 500 .74rem/1.9 var(--f-mono); letter-spacing: .07em; text-transform: uppercase; color: var(--soft); }
.datasheet dd { margin: 0; font-weight: 700; }

/* Checkliste */
.checklist { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: clamp(24px, 5vw, 64px); align-items: start; }
.checks { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.checks li { display: flex; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.checks .ico { width: 22px; height: 22px; color: var(--blue); margin-top: 3px; }
.checks strong { display: block; }
.checks span { color: var(--soft); font-size: .95rem; }

/* FAQ */
.faq { display: grid; grid-template-columns: minmax(0, .7fr) minmax(0, 1.3fr); gap: clamp(24px, 5vw, 64px); align-items: start; }
.faq .head-stack { position: sticky; top: 100px; }
.qa details { border-bottom: 1px solid var(--line); }
.qa details:first-child { border-top: 1px solid var(--line); }
.qa summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; gap: 18px; padding: 18px 0; font-weight: 700; }
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after { content: ""; flex-shrink: 0; width: 16px; height: 16px; margin: 5px 2px 0 0; background: linear-gradient(var(--blue), var(--blue)) center / 100% 2px no-repeat, linear-gradient(var(--blue), var(--blue)) center / 2px 100% no-repeat; transition: transform .2s; }
.qa { overflow: hidden; }
.qa details[open] summary::after { transform: rotate(45deg); }
.qa .a { padding: 0 0 18px; color: var(--soft); max-width: 40em; }

/* Kontakt */
.contact-sec { background: var(--night); color: var(--on-night); }
.contact { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 64px); align-items: start; }
.contact-sec .label { color: var(--green); }
.dial-block h2 { margin: 0 0 28px; font-size: clamp(1.8rem, 3.4vw, 2.6rem); }
.dial { display: inline-flex; align-items: center; gap: 14px; padding: 18px 26px; border-radius: 14px; background: var(--green); color: #11283A; text-decoration: none; }
.dial .ico { width: 28px; height: 28px; }
.dial b { font: 500 clamp(1.6rem, 3.4vw, 2.3rem)/1 var(--f-mono); letter-spacing: -0.01em; }
.lines { list-style: none; margin: 28px 0 0; padding: 0; display: grid; gap: 12px; }
.lines li { display: flex; gap: 12px; align-items: center; color: color-mix(in srgb, var(--on-night) 80%, transparent); }
.lines a { color: var(--on-night); }
.form { background: var(--sheet); color: var(--ink); border-radius: 16px; padding: clamp(20px, 3vw, 32px); }
.form h3 { margin-bottom: 4px; }
.form .intro { color: var(--soft); font-size: .95rem; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
textarea { min-height: 120px; resize: vertical; }
.hp { position: absolute; left: -9999px; }
.err { color: var(--error); font-size: .86rem; }
#f-consent-err { display: none; margin: -4px 0 8px; }
#f-consent-err.show { display: block; }
.invalid { border-color: var(--error) !important; }
.form .btn { margin-top: 8px; }
.status { margin-top: 12px; font-size: .95rem; }
.status.ok { color: var(--green-ink); font-weight: 700; }
.status.fail { color: var(--error); }

/* Fuß als Plankopf (Schriftfeld einer Bauzeichnung) */
.foot { background: var(--paper); border-top: 1px solid var(--line); }
.foot .wrap { padding-block: 48px 40px; }
.plankopf { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2fr); border: 1.5px solid var(--ink); border-radius: 4px; background: var(--sheet); }
.pk-brand { padding: 22px 24px; border-right: 1.5px solid var(--ink); }
.pk-brand p { color: var(--soft); font-size: .92rem; margin: 14px 0 0; max-width: 26em; }
.pk-fields { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin: 0; }
.pk-fields > div { padding: 12px 16px 14px; border-left: 1px solid var(--line); border-top: 1px solid var(--line); }
.pk-fields > div:nth-child(3n+1) { border-left: 0; }
.pk-fields > div:nth-child(-n+3) { border-top: 0; }
.pk-fields dt { font: 500 .7rem var(--f-mono); letter-spacing: .09em; text-transform: uppercase; color: var(--soft); margin-bottom: 4px; }
.pk-fields dd { margin: 0; display: flex; flex-wrap: wrap; gap: 0 14px; font-size: .93rem; }
.pk-fields a { color: var(--ink); text-decoration: none; white-space: nowrap; }
.pk-fields a:hover { color: var(--blue); text-decoration: underline; }
.pk-fields > div:last-child dd { color: var(--soft); font-size: .86rem; }

/* Unterseiten */
.page-head { border-bottom: 1px solid var(--line); padding-block: clamp(40px, 6vw, 72px); background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 40px 40px; }
.page-head h1 { font-size: clamp(2.4rem, 5vw, 3.8rem); font-weight: 800; letter-spacing: -0.035em; margin-top: 0; }
.page-head .me { align-items: center; }
.page-head .me > div { background: var(--paper); box-shadow: 0 0 0 20px var(--paper); }
.split { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 64px); align-items: start; }
.panel { background: var(--night); color: var(--on-night); border-radius: 16px; padding: 28px; }
.panel .label { color: var(--green) !important; }
.panel b { display: block; font: 800 3.4rem/1 var(--f-display); color: var(--green); margin: 12px 0; }
.panel p { color: color-mix(in srgb, var(--on-night) 80%, transparent); margin: 0; }
.tiles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.tiles > div { background: var(--sheet); border: 1px solid var(--line); border-radius: 14px; padding: 24px; }
.tiles .ico { width: 26px; height: 26px; color: var(--blue); }
.tiles h3 { margin: 14px 0 8px; }
.tiles p { color: var(--soft); margin: 0; font-size: .96rem; }
.chips { list-style: none; margin: 0 0 28px; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.chips li { padding: 6px 14px; border: 1px solid var(--line); border-radius: 999px; font-size: .92rem; background: var(--sheet); }
.legal { max-width: 46em; }
.legal h2 { font-size: 1.35rem; margin: 2em 0 .5em; }
.legal h3 { font-size: 1.1rem; margin: 1.6em 0 .4em; }
.legal address { font-style: normal; }

/* Tablet */
@media (max-width: 1080px) {
    .top .wrap { gap: 12px; }
    .menu-btn { display: grid; }
    .nav { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; gap: 0; padding: 8px var(--gutter) 16px; background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: 0 18px 32px -18px rgba(17,40,58,.35); max-height: calc(100dvh - 72px); overflow-y: auto; }
    .top.open .nav { display: flex; }
    .nav a { display: flex; align-items: center; min-height: 52px; padding: 0 12px; font-size: 1.08rem; color: var(--ink); border-bottom: 1px solid var(--line); border-radius: 0; }
    .nav a:last-child { border-bottom: 0; }
    .hero > .wrap { grid-template-columns: minmax(0, 1fr); }
    .hero-text { box-shadow: 0 0 0 16px var(--paper); }
    .bento { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .bento .tile, .bento .tile-main, .bento .tile:nth-child(4), .bento .tile:nth-child(5) { grid-column: auto; grid-row: auto; }
    .bento .tile-main { grid-column: 1 / -1; }
    .steps { grid-template-columns: minmax(0, 1fr); gap: 0; }
    .steps li { padding: 0 0 26px 56px; }
    .steps li::after { top: 36px; left: 17px; bottom: 0; right: auto; width: 1.5px; height: auto; }
    .steps li:last-child { padding-bottom: 0; }
    .plankopf { grid-template-columns: minmax(0, 1fr); }
    .pk-fields a { display: inline-block; padding: 9px 0; }
    .pk-brand { border-right: 0; border-bottom: 1.5px solid var(--ink); }
}
/* Handy */
@media (max-width: 760px) {
    body { font-size: 17px; padding-bottom: calc(68px + env(safe-area-inset-bottom, 0px)); }
    .top .btn { display: none; }
    .callbar { display: flex; position: fixed; left: 0; right: 0; bottom: 0; z-index: 50; border-radius: 0; min-height: 60px; padding-bottom: calc(10px + env(safe-area-inset-bottom, 0px)); font-family: var(--f-mono); font-weight: 500; }
    .head, .checklist, .faq, .contact, .me, .split, .calc { grid-template-columns: minmax(0, 1fr); }
    .faq .head-stack { position: static; }
    .pos-detail { grid-template-columns: minmax(0, 1fr); }
    .pos-num { padding: 14px 0 0; border-left: 0; border-top: 1px solid var(--line); }
    .positions button { font-size: .78rem; padding: 8px 2px; }
    .sheet-bar .scale-note { display: none; }
    .bento { grid-template-columns: minmax(0, 1fr); }
    .tiles { grid-template-columns: minmax(0, 1fr); }
    .grid2 { grid-template-columns: minmax(0, 1fr); }
    .me .portrait { max-width: 240px; }
    .datasheet div { grid-template-columns: minmax(0, 1fr); gap: 0; }
    .partners .wrap { flex-direction: column; align-items: flex-start; }
    .logos { justify-content: flex-start; gap: 18px 28px; }
    .callbar { white-space: nowrap; }
    .dial { width: 100%; justify-content: center; }
    .brand small { font-size: .72rem; }
    .positions button { font-size: .74rem; line-height: 1.15; }
    .pk-fields { grid-template-columns: minmax(0, 1fr); }
    .pk-fields > div, .pk-fields > div:nth-child(-n+3) { border-left: 0; border-top: 1px solid var(--line); }
    .pk-fields > div:first-child { border-top: 0; }
    .lines a { display: inline-block; padding-block: 6px; }
    .tick { margin: 4px 0; padding: 8px 0; }
}