/* ==========================================================================
   Heizung & Sanitär Schwarzbauer – Design-System
   --------------------------------------------------------------------------
   Farbwelt: Kupfer (das Material des Gewerks: Rohre, Wärme) auf kühlem
   Graphit und neutralem Stein-Hell. Bewusst kein Installateur-Blau/Rot,
   kein Beige-Messing-Klischee. Ein Akzent, eine Familie, die ganze Seite.

   Radius-System (dokumentierte Regel, überall einhalten):
   Flächen/Medien = 12px  ·  Formularfelder = 8px  ·  Buttons/Chips = Pill

   Theme: bewusst fixes helles Theme (color-scheme: light). Die Bildwelt
   (Video, Fotos) ist lichtgeführt; dunkle Bänder sind gestalterische
   Akzente innerhalb desselben Themes, kein Theme-Wechsel.
   ========================================================================== */

/* ----- Schriften (Fontshare, frei für kommerzielle Nutzung) -------------- */

@font-face {
  font-family: "Cabinet Grotesk";
  src: url("../assets/fonts/CabinetGrotesk-Variable.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
}
@font-face {
  font-family: "Satoshi";
  src: url("../assets/fonts/Satoshi-Variable.woff2") format("woff2");
  font-weight: 300 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Satoshi";
  src: url("../assets/fonts/Satoshi-VariableItalic.woff2") format("woff2");
  font-weight: 300 900;
  font-style: italic;
  font-display: swap;
}

/* ----- Tokens ------------------------------------------------------------- */

:root {
  color-scheme: light;

  /* Farbe */
  --graphit: #1e2023;
  --graphit-80: #34373b;
  --text: #232529;
  --text-2: #54575c;
  --stein: #f3f2ef;
  --stein-2: #e9e8e3;
  --weiss: #fcfcfb;
  /* Akzent: aus dem Logo-Orange (#f47912) abgeleitetes, vertieftes Kupfer */
  --kupfer: #b0521f;
  --kupfer-tief: #8f421a;
  --kupfer-hell: #e09a63;
  --kupfer-wash: #f1e5da;
  --gruen: #2e7d4f;
  --rot: #c02f2f;
  --linie: rgba(30, 32, 35, 0.14);
  --linie-hell: rgba(252, 252, 251, 0.22);

  /* Typografie */
  --font-display: "Cabinet Grotesk", "Avenir Next", "Helvetica Neue", sans-serif;
  --font-text: "Satoshi", "Avenir Next", "Helvetica Neue", sans-serif;
  --fs-900: clamp(2.9rem, 7.2vw, 5.4rem);
  --fs-800: clamp(2.1rem, 4.6vw, 3.4rem);
  --fs-700: clamp(1.45rem, 2.6vw, 2.1rem);
  --fs-600: clamp(1.2rem, 1.8vw, 1.45rem);
  --fs-500: 1.125rem;
  --fs-400: 1rem;
  --fs-300: 0.9rem;
  --fs-200: 0.8125rem;

  /* Fläche und Form */
  --radius-m: 12px;   /* Karten, Medien */
  --radius-s: 8px;    /* Formularfelder */
  --shadow-media: 0 24px 70px -28px rgba(30, 32, 35, 0.4);
  --shadow-card: 0 14px 40px -22px rgba(30, 32, 35, 0.28);

  /* Rhythmus */
  --section: clamp(5.5rem, 10vw, 9.5rem);
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --content-max: 1320px;
  /* Überlappung Hero → News (die Bereiche greifen ineinander) */
  --hero-news-overlap: clamp(3rem, 6vw, 5rem);

  /* Bewegung */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-1: 200ms;
  --dur-2: 500ms;
  --dur-3: 850ms;

  /* Z-Ebenen (nur systemische Kontexte) */
  --z-header: 100;
  --z-nav-overlay: 90;
}

/* ----- Reset / Basis ------------------------------------------------------ */

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  font-family: var(--font-text);
  font-size: var(--fs-400);
  font-weight: 430;
  line-height: 1.6;
  color: var(--text);
  background: var(--stein);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, video, svg { display: block; max-width: 100%; }
img { height: auto; } /* Breite/Höhe-Attribute reservieren Platz, Skalierung bleibt proportional */

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -0.015em;
  margin: 0 0 0.5em;
  color: var(--text);
  text-wrap: balance;
}
h1 { font-size: var(--fs-900); }
h2 { font-size: var(--fs-800); }
h3 { font-size: var(--fs-700); }
h4 { font-size: var(--fs-600); letter-spacing: -0.005em; }

p { margin: 0 0 1em; max-width: 62ch; }
p:last-child { margin-bottom: 0; }

a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 3px; }

.lead {
  font-size: var(--fs-500);
  font-weight: 460;
  color: var(--text-2);
  line-height: 1.65;
}

.muted { color: var(--text-2); }

::selection { background: var(--kupfer); color: var(--weiss); }

:focus-visible {
  outline: 2px solid var(--kupfer);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ----- Layout-Helfer ------------------------------------------------------ */

.shell {
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  position: relative;
  padding-block: var(--section);
}

/* ----- Ikonografie (Phosphor, inline) ------------------------------------- */

.icon {
  width: 1.15em;
  height: 1.15em;
  flex: none;
  fill: currentColor;
}

/* ----- Buttons ------------------------------------------------------------ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  padding: 0.95em 1.7em;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--font-text);
  font-size: var(--fs-400);
  font-weight: 640;
  line-height: 1.1;
  white-space: nowrap;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--dur-1) ease, border-color var(--dur-1) ease,
              color var(--dur-1) ease, transform var(--dur-1) ease;
}
.btn:active { transform: translateY(1px) scale(0.99); }
.btn .icon { transition: transform var(--dur-1) var(--ease-out); }
.btn:hover .icon--arrow { transform: translateX(3px); }

.btn--primary {
  background: var(--kupfer);
  color: var(--weiss);
}
.btn--primary:hover { background: var(--kupfer-tief); }

.btn--dark {
  background: var(--graphit);
  color: var(--weiss);
}
.btn--dark:hover { background: #000; }

.btn--line {
  border-color: var(--linie);
  color: var(--text);
  background: transparent;
}
.btn--line:hover { border-color: var(--text); }

/* Auf dunklem Grund / über Video */
.btn--line-invert {
  border-color: var(--linie-hell);
  color: var(--weiss);
  background: rgba(30, 32, 35, 0.25);
}
.btn--line-invert:hover { border-color: var(--weiss); background: rgba(30, 32, 35, 0.45); }

/* ----- Erreichbarkeits-Status --------------------------------------------- */

.avail {
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  font-size: var(--fs-300);
  font-weight: 560;
  line-height: 1.3;
}
.avail__dot {
  width: 9px;
  height: 9px;
  flex: none;
  border-radius: 50%;
  background: var(--text-2);
}
.avail.is-open  { color: var(--gruen); }
.avail.is-open .avail__dot { background: var(--gruen); }
.avail.is-closed { color: var(--rot); }
.avail.is-closed .avail__dot { background: var(--rot); }

@media (prefers-reduced-motion: no-preference) {
  .avail.is-open .avail__dot {
    animation: avail-pulse 2.4s ease-in-out infinite;
  }
  @keyframes avail-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(46, 125, 79, 0.35); }
    50%      { box-shadow: 0 0 0 5px rgba(46, 125, 79, 0); }
  }
}

/* Helle Variante über Video: Status muss auf dunklem Grund lesbar sein */
.hero .avail.is-open  { color: #7fd6a4; }
.hero .avail.is-open .avail__dot { background: #7fd6a4; }
.hero .avail.is-closed { color: #ff9d8a; }
.hero .avail.is-closed .avail__dot { background: #ff9d8a; }

/* ----- Scroll-Reveals ------------------------------------------------------ */

[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity var(--dur-3) var(--ease-out), transform var(--dur-3) var(--ease-out);
}
[data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}
/* Gestaffelte Kinder: Verzögerung über data-reveal-child-Index */
[data-reveal] [data-reveal-child] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity var(--dur-3) var(--ease-out), transform var(--dur-3) var(--ease-out);
}
[data-reveal].is-revealed [data-reveal-child] { opacity: 1; transform: none; }
[data-reveal].is-revealed [data-reveal-child]:nth-child(1) { transition-delay: 60ms; }
[data-reveal].is-revealed [data-reveal-child]:nth-child(2) { transition-delay: 140ms; }
[data-reveal].is-revealed [data-reveal-child]:nth-child(3) { transition-delay: 220ms; }
[data-reveal].is-revealed [data-reveal-child]:nth-child(4) { transition-delay: 300ms; }
[data-reveal].is-revealed [data-reveal-child]:nth-child(5) { transition-delay: 380ms; }

@media (prefers-reduced-motion: reduce) {
  [data-reveal], [data-reveal] [data-reveal-child] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* ----- Leitungslinie -------------------------------------------------------
   Der rote Faden der Seite: eine zentrierte, vertikale Kupfer-Steigleitung,
   die die Abschnitte in ihren Zwischenräumen verbindet und sich beim Scrollen
   von oben nach unten aufbaut (CSS Scroll-Driven Animation).

   Bewusst zentriert und in fester, schmaler Breite gehalten: so verzerrt die
   Linie bei keiner Bildschirmbreite und trifft immer denselben Punkt, statt
   wie eine breite SVG-Fläche in Bilder oder Text hineinzulaufen.
   Fallback ohne Support: Linie steht fertig gezeichnet da. */

.pipe-run {
  position: absolute;
  left: 50%;
  z-index: 1;
  width: 2px;
  height: var(--pipe-h, clamp(72px, 11vw, 132px));
  /* Sitzt mittig über der Abschnittsgrenze und ragt nach oben in den
     vorherigen Abschnitt: der Anfang der Linie liegt im Zwischenraum. */
  top: calc(-0.5 * var(--pipe-h, clamp(72px, 11vw, 132px)));
  pointer-events: none;
  background: var(--kupfer);
  opacity: 0.6;
  transform: translateX(-50%);
  transform-origin: top center;
}
/* Kleiner "Anschluss" am unteren Ende, dorthin, wo die Linie andockt. */
.pipe-run::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -3px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--kupfer);
  transform: translateX(-50%);
}

@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .pipe-run {
      scale: 1 0;
      animation: pipe-grow linear both;
      animation-timeline: view();
      animation-range: entry 0% cover 48%;
    }
    .pipe-run::after {
      opacity: 0;
      animation: pipe-dot linear both;
      animation-timeline: view();
      animation-range: cover 40% cover 52%;
    }
  }
}
@keyframes pipe-grow {
  from { scale: 1 0; }
  to   { scale: 1 1; }
}
@keyframes pipe-dot {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ==========================================================================
   HEADER
   ========================================================================== */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: var(--z-header);
  transition: background-color var(--dur-2) ease, box-shadow var(--dur-2) ease;
}
.site-header__bar {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  height: 76px;
}

.site-header__brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.6em;
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.3rem;
  letter-spacing: -0.01em;
  color: var(--weiss);
  transition: color var(--dur-2) ease;
}
.site-header__brand small {
  font-family: var(--font-text);
  font-size: 0.72rem;
  font-weight: 540;
  letter-spacing: 0.01em;
  white-space: nowrap;
  color: rgba(252, 252, 251, 0.75);
  transition: color var(--dur-2) ease;
}
/* Auf schmaleren Desktops den Zusatz ausblenden, damit die Nav nicht drängt. */
@media (max-width: 1130px) {
  .site-header__brand small { display: none; }
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: clamp(1.1rem, 2vw, 1.9rem);
  margin-left: auto;
}
.site-header__nav a {
  font-size: var(--fs-300);
  font-weight: 560;
  text-decoration: none;
  color: rgba(252, 252, 251, 0.9);
  transition: color var(--dur-1) ease;
}
.site-header__nav a:hover { color: var(--weiss); }

.site-header__phone {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-size: var(--fs-300);
  font-weight: 640;
  white-space: nowrap;
  text-decoration: none;
  color: var(--weiss);
  border: 1px solid var(--linie-hell);
  border-radius: 999px;
  padding: 0.55em 1.1em;
  transition: border-color var(--dur-1) ease, color var(--dur-2) ease, background-color var(--dur-1) ease;
}
.site-header__phone:hover { border-color: var(--weiss); }

/* Header nach dem Hero: fester heller Grund, Graphit-Text */
.site-header.is-solid {
  background: rgba(243, 242, 239, 0.92);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--linie);
}
.site-header.is-solid .site-header__brand { color: var(--text); }
.site-header.is-solid .site-header__brand small { color: var(--text-2); }
.site-header.is-solid .site-header__nav a { color: var(--text-2); }
.site-header.is-solid .site-header__nav a:hover { color: var(--text); }
.site-header.is-solid .site-header__phone {
  color: var(--text);
  border-color: var(--linie);
}
.site-header.is-solid .site-header__phone:hover { border-color: var(--text); }

.site-header__toggle {
  display: none;
  margin-left: auto;
  background: none;
  border: 0;
  padding: 0.5rem;
  color: var(--weiss);
  cursor: pointer;
}
.site-header.is-solid .site-header__toggle { color: var(--text); }
.site-header__toggle .icon { width: 1.7rem; height: 1.7rem; }
.site-header__toggle .icon--close { display: none; }

@media (max-width: 900px) {
  .site-header__nav {
    position: fixed;
    inset: 0;
    z-index: var(--z-nav-overlay);
    flex-direction: column;
    justify-content: center;
    gap: 2.2rem;
    background: var(--graphit);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--dur-2) ease;
  }
  .site-header__nav a { font-size: var(--fs-600); color: var(--weiss); }
  .site-header__phone { border: 0; padding: 0; }
  body.nav-open .site-header__nav { opacity: 1; pointer-events: auto; }
  .site-header__toggle { display: inline-flex; position: relative; z-index: calc(var(--z-nav-overlay) + 1); }
  body.nav-open .site-header__toggle { color: var(--weiss); }
  body.nav-open .site-header__toggle .icon--menu { display: none; }
  body.nav-open .site-header__toggle .icon--close { display: block; }
  body.nav-open { overflow: hidden; }
}

/* ==========================================================================
   HERO
   ========================================================================== */

.hero {
  position: relative;
  min-height: 100vh;   /* Fallback */
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  isolation: isolate;
  color: var(--weiss);
}

.hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  background: var(--graphit);
}
.hero__poster,
.hero__video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
}
.hero__video {
  opacity: 0;
  transition: opacity 900ms ease;
}
.hero__video--ready { opacity: 1; }

/* Scrim: Textseite links dunkler, Fuß dunkler für den Übergang */
.hero__shade {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(90deg, rgba(18, 19, 21, 0.82) 0%, rgba(18, 19, 21, 0.45) 42%, rgba(18, 19, 21, 0.06) 78%),
    linear-gradient(0deg, rgba(18, 19, 21, 0.88) 0%, rgba(18, 19, 21, 0.12) 42%, rgba(18, 19, 21, 0.38) 100%);
}

.hero__content {
  position: relative;
  z-index: 2;
  width: 100%;
  /* Unten Platz lassen: dort dockt die News-Hauptmeldung ans Video an */
  padding-block: clamp(6rem, 14vh, 9rem) calc(clamp(2.5rem, 6vh, 4.5rem) + var(--hero-news-overlap));
}

.hero__eyebrow {
  font-size: var(--fs-300);
  font-weight: 560;
  letter-spacing: 0.02em;
  color: rgba(252, 252, 251, 0.85);
  margin: 0 0 1.1rem;
}

.hero h1 {
  color: var(--weiss);
  max-width: 13ch;
  margin-bottom: 1.2rem;
}

.hero__sub {
  font-size: var(--fs-500);
  font-weight: 460;
  line-height: 1.55;
  color: rgba(252, 252, 251, 0.92);
  max-width: 44ch;
  margin: 0 0 2rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.2rem;
}

.hero__phone-note {
  font-size: var(--fs-300);
  color: rgba(252, 252, 251, 0.75);
  font-weight: 500;
}

/* Statusleiste am Hero-Fuß: Öffnungszeiten + Live-Status */
.hero__status {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem 1.6rem;
  border-top: 1px solid var(--linie-hell);
  padding-top: 1.3rem;
  max-width: 720px;
}
.hero__hours {
  font-size: var(--fs-300);
  color: rgba(252, 252, 251, 0.78);
  font-weight: 500;
}

/* Sanfter Einstieg beim Laden (nur beim ersten Aufbau) */
@media (prefers-reduced-motion: no-preference) {
  .hero__content > * {
    opacity: 0;
    transform: translateY(24px);
    animation: hero-in 950ms var(--ease-out) forwards;
  }
  .hero__content > *:nth-child(1) { animation-delay: 150ms; }
  .hero__content > *:nth-child(2) { animation-delay: 260ms; }
  .hero__content > *:nth-child(3) { animation-delay: 380ms; }
  .hero__content > *:nth-child(4) { animation-delay: 500ms; }
  .hero__content > *:nth-child(5) { animation-delay: 640ms; }
  @keyframes hero-in {
    to { opacity: 1; transform: none; }
  }
}

@media (max-width: 720px) {
  .hero { align-items: flex-end; }
  .hero h1 { max-width: 12ch; }
  .hero__actions .btn { width: 100%; justify-content: center; }
  .hero__actions { gap: 0.7rem; }
}

/* ==========================================================================
   AKTUELLES
   ========================================================================== */

.news { padding-top: 0; }

.news__grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  grid-template-areas:
    "feature head"
    "feature side";
  grid-template-rows: auto 1fr;
  gap: 0 clamp(2rem, 4vw, 3.5rem);
}
.news__head {
  grid-area: head;
  padding-top: clamp(2rem, 4vw, 3rem);
}
.news__head h2 { margin-bottom: 0; font-size: var(--fs-700); }

/* Die Hauptmeldung steigt über die Sektionsgrenze und dockt ans Hero-Video an */
.news__feature {
  grid-area: feature;
  margin-top: calc(-1 * var(--hero-news-overlap));
  align-self: start;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.4rem;
  background: var(--graphit);
  color: var(--weiss);
  border: 1px solid rgba(252, 252, 251, 0.08);
  border-radius: var(--radius-m);
  padding: clamp(2rem, 4vw, 3.25rem);
  box-shadow: var(--shadow-card);
}
.news__feature h3 { color: var(--weiss); max-width: 18ch; }
.news__feature p { color: rgba(252, 252, 251, 0.84); max-width: 46ch; }
.news__feature .btn { margin-top: 1.6rem; }

.news__kicker {
  font-size: 0.78rem;
  font-weight: 680;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--kupfer-hell);
  margin: 0 0 0.7rem;
}

.news__side {
  grid-area: side;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding-top: 0.6rem;
}
.news__item {
  display: grid;
  grid-template-columns: 104px 1fr;
  gap: 1.4rem;
  align-items: center;
  padding-block: 1.6rem;
}
.news__item + .news__item { border-top: 1px solid var(--linie); }
.news__item img {
  width: 104px;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius-m);
  background: var(--weiss);
}
.news__item h4 { margin-bottom: 0.25em; }
.news__item p { font-size: var(--fs-300); color: var(--text-2); }

@media (max-width: 960px) {
  .news__grid {
    grid-template-columns: 1fr;
    grid-template-areas: "feature" "head" "side";
    grid-template-rows: none;
  }
  .news__head { padding-top: 2.2rem; }
}

/* ==========================================================================
   FLIESSENDE LEISTUNGSABSCHNITTE
   ========================================================================== */

.section > .shell { position: relative; z-index: 2; }

/* Getönte Abschnitte laufen weich aus statt hart zu schneiden:
   kein striktes Teilen der Sektionen, alles bleibt eine Fläche. */
.section--tint {
  background: linear-gradient(
    180deg,
    rgba(233, 232, 227, 0) 0%,
    var(--stein-2) clamp(3rem, 8vw, 7rem),
    var(--stein-2) calc(100% - clamp(3rem, 8vw, 7rem)),
    rgba(233, 232, 227, 0) 100%
  );
}

.flow__grid {
  display: grid;
  grid-template-columns: 1.12fr 1fr;
  gap: clamp(2.25rem, 5vw, 4.75rem);
  align-items: center;
}
.flow__grid--mirror { grid-template-columns: 1fr 1.12fr; }

.flow__media { position: relative; margin: 0; }
.flow__media video,
.flow__media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-media);
  background: var(--stein-2);
}

.flow__caption {
  margin-top: 0.85rem;
  font-size: var(--fs-200);
  color: var(--text-2);
}

/* Die Medienspalte des Wärmepumpen-Abschnitts ragt in den News-Bereich hinein:
   das fließende Konzept, Abschnitte greifen ineinander. */
.flow--waermepumpe { padding-top: clamp(2rem, 4vw, 3.5rem); }
.flow--waermepumpe .flow__media { margin-top: calc(-1 * clamp(2.5rem, 7vw, 6.5rem)); }

/* Eingesetztes Referenzbild, ragt in den nächsten Abschnitt */
.flow__inset {
  margin: clamp(2.5rem, 6vw, 4.5rem) 0 calc(-1 * clamp(4rem, 10vw, 9rem)) auto;
  max-width: min(560px, 52%);
  position: relative;
  z-index: 3;
}
.flow__inset img {
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-media);
}
.flow--bad {
  padding-top: calc(var(--section) + clamp(2rem, 5vw, 4rem));
  padding-bottom: clamp(3rem, 5vw, 4rem);
}

/* Das Bad-Video hängt sichtbar in das dunkle Klima-Band hinein,
   die Bildunterschrift steht dann auf dunklem Grund.
   (translate statt negativer Margin: die Grid-Zentrierung würde
   eine Margin schlucken, weil die Textspalte die Zeilenhöhe vorgibt) */
.flow--bad .flow__media {
  align-self: end;
  transform: translateY(clamp(4.5rem, 8vw, 6.5rem));
}
.flow--bad .flow__caption { color: rgba(252, 252, 251, 0.65); }
.flow--bad + .band--dark { padding-top: calc(var(--section) + clamp(3rem, 7vw, 6rem)); }

/* Sachliche Merkmalzeilen (nur Trennlinie oben, bewusst sparsam) */
.spec-rows { margin: 2rem 0 0; }
.spec-rows__row {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 0.4rem 1.4rem;
  padding-block: 0.95rem;
  border-top: 1px solid var(--linie);
}
.spec-rows__row dt { font-weight: 660; }
.spec-rows__row dd { margin: 0; color: var(--text-2); font-size: var(--fs-300); line-height: 1.55; }

/* Häkchenliste (Icon: Phosphor "check" als Maske) */
.tick-list {
  list-style: none;
  padding: 0;
  margin: 1.7rem 0 0;
}
.tick-list li {
  position: relative;
  padding: 0.5rem 0 0.5rem 2rem;
}
.tick-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.92em;
  width: 1.05em;
  height: 1.05em;
  background: var(--kupfer);
  -webkit-mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 256"><path d="M229.66,77.66l-128,128a8,8,0,0,1-11.32,0l-56-56a8,8,0,0,1,11.32-11.32L96,188.69,218.34,66.34a8,8,0,0,1,11.32,11.32Z"/></svg>') center / contain no-repeat;
  mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 256"><path d="M229.66,77.66l-128,128a8,8,0,0,1-11.32,0l-56-56a8,8,0,0,1,11.32-11.32L96,188.69,218.34,66.34a8,8,0,0,1,11.32,11.32Z"/></svg>') center / contain no-repeat;
}

.flow__extras { margin-top: 1.7rem; color: var(--text-2); }
.flow__extras strong { color: var(--text); font-weight: 660; }

.flow__actions { margin-top: 2.1rem; }

@media (max-width: 960px) {
  .flow__grid,
  .flow__grid--mirror { display: block; }
  .flow__media { margin-bottom: 2rem; }
  .flow__grid--mirror .flow__media { margin-bottom: 0; margin-top: 2.25rem; }
  .flow--waermepumpe .flow__media { margin-top: 0; }
  .flow__inset { max-width: 100%; margin: 2.25rem 0 0; }
  /* Einspaltig: sauberer Schnitt zwischen Bad (hell) und Klima (dunkel)
     statt einer halben Überlappung. Die Bildunterschrift bleibt dunkel
     und lesbar, weil sie hier auf hellem Grund steht (nicht im dunklen Band). */
  .flow--bad { padding-top: var(--section); padding-bottom: var(--section); }
  .flow--bad .flow__media { transform: none; margin-bottom: 0; }
  .flow--bad .flow__caption { color: var(--text-2); }
  .flow--bad + .band--dark { padding-top: var(--section); }
  .spec-rows__row { grid-template-columns: 1fr; }
}

/* ==========================================================================
   DUNKLES BAND: KLIMA & LÜFTUNG
   ========================================================================== */

.band--dark {
  background: var(--graphit);
}
.band--dark h2 { color: var(--weiss); }
.band--dark .lead { color: rgba(252, 252, 251, 0.8); }
.band--dark p { color: rgba(252, 252, 251, 0.8); }

.band__head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto clamp(2.75rem, 5.5vw, 4.25rem);
}
.band__head .lead { margin-inline: auto; }

.band__media {
  margin: 0 auto clamp(3rem, 7vw, 5rem);
  max-width: 920px;
}
.band__media video {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-m);
  border: 1px solid rgba(252, 252, 251, 0.12);
  box-shadow: 0 30px 80px -30px rgba(0, 0, 0, 0.6);
  background: var(--graphit-80);
}

.band__points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(2rem, 4vw, 3rem);
  max-width: 980px;
  margin-inline: auto;
}
.band__point h4 { color: var(--weiss); margin-bottom: 0.45em; }
.band__point p { color: rgba(252, 252, 251, 0.72); font-size: var(--fs-300); margin: 0; }

@media (max-width: 760px) {
  .band__points { grid-template-columns: 1fr; gap: 1.8rem; }
}

/* ==========================================================================
   SOLAR & SANIERUNG (Hairline-Split)
   ========================================================================== */

.split-head {
  text-align: center;
  margin-bottom: clamp(2.75rem, 5.5vw, 4.25rem);
}
.split-head h2 { margin-bottom: 0; }

.split-cols {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}
.split-cols__divider {
  width: 1px;
  align-self: stretch;
  background: var(--linie);
}
.split-cols__media { margin: 0 0 1.5rem; }
.split-cols__media img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-media);
}
.split-cols__col h3 { margin-bottom: 0.55em; }

@media (max-width: 860px) {
  .split-cols { grid-template-columns: 1fr; gap: 2.5rem; }
  .split-cols__divider { width: 100%; height: 1px; }
}

/* ==========================================================================
   BETRIEB & VERTRAUEN
   ========================================================================== */

.betrieb__intro {
  max-width: 640px;
  margin: 0 auto clamp(3.5rem, 7vw, 5.5rem);
  text-align: center;
}
.betrieb__intro h2 { margin-bottom: 0.6em; }
.betrieb__intro .lead { margin-inline: auto; }
.betrieb__intro p:not(.lead) {
  text-align: left;
  margin-inline: auto;
  margin-top: 1.4rem;
}
.betrieb__badge {
  display: block;
  margin: 2.4rem auto 0;
  width: 200px;
  height: auto;
  border-radius: var(--radius-s);
  border: 1px solid var(--linie);
}
.betrieb__signoff {
  margin-top: 1.8rem;
  font-size: var(--fs-300);
  color: var(--text-2);
  text-align: center;
}
.betrieb__signoff em {
  font-style: italic;
  font-weight: 560;
  color: var(--text);
}

.betrieb__brands { margin-bottom: clamp(3.5rem, 7vw, 5.5rem); }
.betrieb__brands-label {
  text-align: center;
  font-size: var(--fs-300);
  color: var(--text-2);
  margin-bottom: 1.7rem;
}
.brand-row {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.6rem clamp(1.6rem, 4vw, 3rem);
}
.brand-row li { width: 104px; }
.brand-row img {
  width: 100%;
  height: auto;
  mix-blend-mode: multiply;
  filter: grayscale(1) opacity(0.6);
  transition: filter var(--dur-2) ease;
}
.brand-row li:hover img { filter: grayscale(0) opacity(1); }

.betrieb__reviews {
  padding-top: clamp(3rem, 6vw, 4.5rem);
  border-top: 1px solid var(--linie);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(2.5rem, 5vw, 4rem);
  align-items: start;
}
.review-score {
  display: flex;
  align-items: center;
  gap: 1rem;
  white-space: nowrap;
}
.review-score__value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2.6rem;
  line-height: 1;
  color: var(--text);
}
.review-score__stars {
  display: flex;
  gap: 0.15rem;
  color: var(--kupfer);
  margin-bottom: 0.35rem;
}
.review-score__stars .icon { width: 1rem; height: 1rem; }
.icon--star-dim { opacity: 0.35; }
.review-score__meta {
  margin: 0.3rem 0 0;
  font-size: var(--fs-200);
  color: var(--text-2);
}

.review-quotes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.5rem, 3vw, 2.5rem);
}
.review-quote {
  margin: 0;
  padding-left: 1.1rem;
  border-left: 2px solid var(--kupfer);
}
.review-quote blockquote {
  margin: 0 0 0.7rem;
  font-size: var(--fs-300);
  line-height: 1.55;
  color: var(--text);
}
.review-quote figcaption { font-size: var(--fs-200); color: var(--text-2); }

@media (max-width: 900px) {
  .betrieb__reviews { grid-template-columns: 1fr; }
  .review-quotes { grid-template-columns: 1fr; gap: 1.6rem; }
}

/* ==========================================================================
   FÖRDERUNG (Mock-Rechner)
   ========================================================================== */

.foerderung__grid {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: clamp(2.5rem, 5vw, 4.5rem);
  align-items: start;
}
.foerderung__intro h2 { margin-bottom: 0.7em; }
.foerderung__intro p + p { margin-top: 1.1em; }

.calc {
  background: var(--weiss);
  border: 1px solid var(--linie);
  border-radius: var(--radius-m);
  padding: clamp(1.75rem, 3.5vw, 2.5rem);
  box-shadow: var(--shadow-card);
}
.calc__row + .calc__row { margin-top: 1.6rem; }
.calc__label {
  display: block;
  font-size: var(--fs-300);
  font-weight: 640;
  margin-bottom: 0.7rem;
}
.calc__chips { display: flex; flex-wrap: wrap; gap: 0.6rem; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.55em 1.1em;
  border-radius: 999px;
  border: 1px solid var(--linie);
  background: transparent;
  font-family: var(--font-text);
  font-size: var(--fs-300);
  font-weight: 560;
  color: var(--text-2);
  cursor: pointer;
  transition: border-color var(--dur-1) ease, color var(--dur-1) ease, background-color var(--dur-1) ease;
}
.chip .icon { width: 1rem; height: 1rem; }
.chip:hover { border-color: var(--text); color: var(--text); }
.chip.is-active {
  border-color: var(--kupfer);
  background: var(--kupfer-wash);
  color: var(--kupfer-tief);
}

.calc__result {
  margin-top: 2rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--linie);
}
.calc__result-label { font-size: var(--fs-300); color: var(--text-2); margin: 0 0 0.4rem; }
.calc__result-value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-700);
  color: var(--kupfer-tief);
  margin: 0 0 0.6rem;
}
.calc__result-note { font-size: var(--fs-200); color: var(--text-2); margin: 0; }
.calc__cta { margin-top: 1.8rem; width: 100%; justify-content: center; }

@media (max-width: 860px) {
  .foerderung__grid { display: block; }
  .foerderung__intro { margin-bottom: 2.5rem; }
}

/* ==========================================================================
   REFERENZEN (Galerie)
   ========================================================================== */

.gallery {
  margin-top: clamp(2.5rem, 5vw, 4rem);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(3, clamp(150px, 19vw, 260px));
  grid-template-areas:
    "a a b c"
    "a a d d"
    "e e f f";
  gap: clamp(1rem, 2vw, 1.5rem);
}
.gallery__item {
  position: relative;
  margin: 0;
  border-radius: var(--radius-m);
  overflow: hidden;
  box-shadow: var(--shadow-media);
}
.gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.gallery__item:nth-child(1) { grid-area: a; }
.gallery__item:nth-child(2) { grid-area: b; }
.gallery__item:nth-child(3) { grid-area: c; }
.gallery__item:nth-child(4) { grid-area: d; }
.gallery__item:nth-child(5) { grid-area: e; }
.gallery__item:nth-child(6) { grid-area: f; }
.gallery__item figcaption {
  position: absolute;
  inset: auto 0 0 0;
  padding: 1.5rem 1.1rem 1rem;
  font-size: var(--fs-200);
  color: var(--weiss);
  background: linear-gradient(0deg, rgba(18, 19, 21, 0.8) 0%, rgba(18, 19, 21, 0) 100%);
}

@media (max-width: 760px) {
  .gallery {
    grid-template-columns: 1fr;
    grid-template-rows: none;
    grid-template-areas: none;
  }
  .gallery__item { grid-area: auto !important; aspect-ratio: 4 / 3; }
}

/* ==========================================================================
   ANFRAGE (Mock-Formular)
   ========================================================================== */

.anfrage__grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(2.5rem, 5vw, 4.5rem);
  align-items: start;
}
.anfrage__intro h2 { margin-bottom: 0.6em; }

.contact-block {
  margin-top: 2.2rem;
  padding-top: 1.8rem;
  border-top: 1px solid var(--linie);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.9rem;
}
.contact-block__row {
  display: inline-flex;
  align-items: center;
  gap: 0.7em;
  font-size: var(--fs-500);
  font-weight: 640;
  text-decoration: none;
  color: var(--text);
  transition: color var(--dur-1) ease;
}
.contact-block__row .icon { color: var(--kupfer); }
.contact-block__row:hover { color: var(--kupfer-tief); }

.request-form {
  background: var(--weiss);
  border: 1px solid var(--linie);
  border-radius: var(--radius-m);
  padding: clamp(1.75rem, 3.5vw, 2.5rem);
  box-shadow: var(--shadow-card);
}
.request-form__field + .request-form__field,
.request-form__field + .request-form__row,
.request-form__row + .request-form__field { margin-top: 1.4rem; }
.request-form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.4rem;
}
.request-form__label {
  display: block;
  font-size: var(--fs-300);
  font-weight: 640;
  margin-bottom: 0.55rem;
}
.request-form input,
.request-form textarea {
  width: 100%;
  padding: 0.85em 1em;
  border-radius: var(--radius-s);
  border: 1px solid var(--linie);
  background: var(--stein);
  font-family: var(--font-text);
  font-size: var(--fs-400);
  color: var(--text);
  transition: border-color var(--dur-1) ease;
}
.request-form input::placeholder,
.request-form textarea::placeholder { color: var(--text-2); opacity: 0.75; }
.request-form input:focus,
.request-form textarea:focus { outline: none; border-color: var(--kupfer); }
.request-form textarea { resize: vertical; min-height: 6.5rem; }

.request-form__error {
  display: none;
  margin-top: 0.5rem;
  font-size: var(--fs-200);
  color: var(--rot);
}
.request-form__field.has-error input { border-color: var(--rot); }
.request-form__field.has-error .request-form__error { display: block; }

.request-form__submit { margin-top: 1.8rem; width: 100%; justify-content: center; }

.request-form__success {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  margin-top: 1.4rem;
  padding: 1.2rem 1.3rem;
  border-radius: var(--radius-s);
  background: var(--kupfer-wash);
  color: var(--kupfer-tief);
}
.request-form__success[hidden] { display: none; }
.request-form__success .icon { flex: none; margin-top: 0.15rem; }
.request-form__success h4 { color: var(--kupfer-tief); margin-bottom: 0.25em; font-size: var(--fs-500); }
.request-form__success p { color: var(--kupfer-tief); font-size: var(--fs-300); margin: 0; }

@media (max-width: 860px) {
  .anfrage__grid { display: block; }
  .anfrage__intro { margin-bottom: 2.5rem; }
  .request-form__row { grid-template-columns: 1fr; }
}

/* ==========================================================================
   FOOTER
   ========================================================================== */

.site-footer {
  position: relative;
  overflow: hidden;
  background: var(--graphit);
  color: rgba(252, 252, 251, 0.85);
  padding-top: clamp(4rem, 8vw, 6rem);
}
/* Die Steigleitung läuft in den Footer aus: in Kupfer-Hell, damit sie auf
   dem dunklen Grund sichtbar bleibt (Kupfer selbst wäre zu dunkel). */
.site-footer .pipe-run { background: var(--kupfer-hell); opacity: 0.45; }
.site-footer .pipe-run::after { background: var(--kupfer-hell); }
.site-footer__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.3fr;
  gap: 2.5rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--linie-hell);
}
.site-footer__logo {
  width: 84px;
  height: auto;
  border-radius: var(--radius-s);
  margin-bottom: 1rem;
}
.site-footer__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.7rem;
  letter-spacing: -0.01em;
  color: var(--weiss);
  margin: 0 0 0.15em;
}
.site-footer__brand .muted { color: rgba(252, 252, 251, 0.6); margin-bottom: 1.1em; }
.site-footer__block { font-style: normal; }
.site-footer__block h4 {
  color: var(--weiss);
  font-size: var(--fs-400);
  margin-bottom: 0.7em;
}
.site-footer__block p { font-size: var(--fs-300); line-height: 1.7; }
.site-footer__block .muted { color: rgba(252, 252, 251, 0.55); margin-top: 0.7em; }
.site-footer a { color: inherit; }
.site-footer a:hover { color: var(--weiss); }

.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-block: 1.7rem;
  font-size: var(--fs-200);
  color: rgba(252, 252, 251, 0.55);
}

@media (max-width: 960px) {
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .site-footer__grid { grid-template-columns: 1fr; gap: 1.8rem; }
}