:root {
  --ink: #071421;
  --muted: #5d6673;
  --brand-blue: #072a4b;
  --brand-green: #00998f;
  --accent: #0e7fa8;
  --paper: #f6f7f8;
  --line: rgba(7, 20, 33, 0.12);
  --glass: rgba(255, 255, 255, 0.76);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 132px;
}

body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: fixed;
  z-index: 20;
  top: 14px;
  left: 50%;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  width: min(1120px, calc(100% - 28px));
  min-height: 78px;
  padding: 12px 14px 12px 24px;
  border: 1px solid rgba(7, 20, 33, 0.08);
  border-radius: 999px;
  background: #fff;
  box-shadow: 0 18px 54px rgba(4, 14, 28, 0.16);
  transform: translateX(-50%);
  transition: min-height 180ms ease, padding 180ms ease, box-shadow 180ms ease;
}

.site-header.is-compact {
  min-height: 58px;
  padding: 8px 12px 8px 18px;
  box-shadow: 0 12px 36px rgba(4, 14, 28, 0.14);
}

.site-header.is-compact .brand img {
  width: 220px;
}

.site-header.is-compact .header-cta {
  min-height: 36px;
}

#konfigurator,
#sofort-lieferbar,
#waermepumpen-info,
#vorteile,
#ablauf {
  scroll-margin-top: 132px;
}

.brand img {
  display: block;
  width: 300px;
  height: auto;
}

footer img {
  display: block;
  width: 216px;
  height: auto;
}

.site-header nav,
footer nav {
  display: flex;
  justify-content: center;
  gap: 28px;
  color: rgba(7, 20, 33, 0.78);
  font-size: 16px;
  font-weight: 600;
}

.site-header nav {
  align-items: center;
  font-size: 18px;
  font-weight: 750;
}

.site-header nav a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
}

.site-header nav .nav-alert {
  min-height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  color: #fff;
  background: #a43a36;
  box-shadow: 0 8px 18px rgba(164, 58, 54, 0.18);
}

.header-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 0 26px;
  border-radius: 999px;
  font-size: 17px;
  font-weight: 700;
  white-space: nowrap;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.header-cta,
.button.primary {
  color: #fff;
  background: linear-gradient(135deg, var(--brand-green), #007a72);
  box-shadow: 0 18px 38px rgba(0, 153, 143, 0.34);
}

.header-cta:hover,
.button.primary:hover {
  box-shadow: 0 22px 48px rgba(0, 153, 143, 0.42);
  transform: translateY(-1px);
}

.button.ghost {
  border: 1px solid rgba(255, 255, 255, 0.5);
  color: #fff;
  background: rgba(255, 255, 255, 0.13);
  backdrop-filter: blur(12px);
}

.button.wide {
  width: 100%;
}

.hero {
  --warm-progress: 0;
  --warm-copy: 0;
  position: relative;
  min-height: 220svh;
  color: #fff;
}

.hero-sticky {
  position: sticky;
  top: 0;
  display: grid;
  min-height: 100svh;
  overflow: hidden;
}

.hero-image,
.hero-image-stack,
.hero-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-image-stack {
  --warm-reveal: 0%;
  overflow: hidden;
}

.hero-image {
  inset: 0 auto 0 50%;
  width: auto;
  max-width: none;
  height: 100%;
  transform: translateX(-50%);
}

.hero-before {
  filter: saturate(0.82) contrast(1.1);
}

.hero-after-reveal {
  position: absolute;
  inset: 0;
  clip-path: inset(0 calc(100% - var(--warm-reveal)) 0 0);
  transition: clip-path 80ms linear;
}

.hero-after {
  filter: saturate(1.04);
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(2, 8, 15, 0.82) 0%, rgba(2, 8, 15, 0.56) 34%, rgba(2, 8, 15, 0.08) 72%),
    linear-gradient(0deg, rgba(2, 8, 15, 0.34), rgba(2, 8, 15, 0.08));
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hero-content {
  grid-area: 1 / 1;
  position: relative;
  isolation: isolate;
  z-index: 2;
  align-self: center;
  width: min(690px, calc(100% - 40px));
  margin: 92px auto 120px;
  opacity: clamp(0, var(--warm-copy), 1);
  transform: translateX(-28%);
}

.hero-content::before {
  position: absolute;
  inset: -26px calc((100vw - 100%) / -2) -30px;
  z-index: -1;
  border: 1px solid rgba(255, 211, 155, 0.34);
  border-radius: 0;
  background:
    radial-gradient(circle at 18% 16%, rgba(255, 214, 132, 0.4), rgba(255, 214, 132, 0) 38%),
    linear-gradient(135deg, rgba(99, 48, 18, 0.5), rgba(160, 89, 28, 0.3) 54%, rgba(255, 177, 80, 0.2));
  box-shadow: 0 24px 72px rgba(97, 45, 12, 0.34);
  content: "";
  opacity: clamp(0, var(--warm-copy), 1);
}

.cold-message {
  grid-area: 1 / 1;
  position: relative;
  z-index: 2;
  align-self: center;
  width: min(760px, calc(100% - 40px));
  margin: 92px auto 120px;
  color: #fff;
  text-align: center;
  opacity: clamp(0, calc(1 - (var(--warm-progress) * 1.35)), 1);
  pointer-events: none;
}

.cold-message span {
  display: block;
  font-size: clamp(54px, 8vw, 116px);
  font-weight: 900;
  line-height: 0.9;
  letter-spacing: 0;
}

.cold-message strong {
  display: block;
  max-width: 520px;
  margin: 20px auto 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(22px, 2.4vw, 34px);
  line-height: 1.12;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #7fd3ee;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 660px;
  margin-bottom: 22px;
  font-size: clamp(48px, 7vw, 92px);
  line-height: 0.94;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(34px, 5vw, 64px);
  line-height: 1;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 560px;
  color: rgba(255, 255, 255, 0.86);
  font-size: 21px;
  line-height: 1.45;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.availability-badge {
  display: inline-grid;
  gap: 5px;
  max-width: 360px;
  margin-bottom: 24px;
  padding: 14px 18px;
  border: 1px solid rgba(255, 255, 255, 0.36);
  background: rgba(255, 255, 255, 0.16);
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.18);
  backdrop-filter: blur(16px);
}

.availability-badge span {
  color: #9fe9ff;
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.availability-badge strong {
  color: #fff;
  font-size: 18px;
  line-height: 1.15;
}

.hero-stats {
  position: absolute;
  right: 32px;
  bottom: 28px;
  left: 32px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 0;
  background: linear-gradient(135deg, rgba(255, 216, 150, 0.24), rgba(102, 53, 20, 0.32));
  box-shadow: 0 20px 60px rgba(78, 35, 10, 0.22);
  backdrop-filter: blur(18px);
  opacity: clamp(0, var(--warm-copy), 1);
  transform: translateY(calc((1 - var(--warm-copy)) * 18px));
  transition: opacity 120ms linear, transform 120ms linear;
}

.hero-stats span {
  display: grid;
  gap: 8px;
  padding: 18px 22px;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.82);
  font-size: 15px;
  line-height: 1.35;
}

.hero-stats strong {
  color: #fff;
  font-size: 24px;
  line-height: 1;
}

.band,
.heatpump-info,
.configurator,
.stock-section,
.final-cta,
.process {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.stock-section {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 1.08fr);
  gap: 44px;
  align-items: center;
  padding: 96px 0 76px;
}

.stock-copy p {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.6;
}

.stock-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.stock-points span {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid rgba(14, 127, 168, 0.22);
  background: rgba(14, 127, 168, 0.08);
  color: var(--brand-blue);
  font-size: 14px;
  font-weight: 850;
}

.stock-visual {
  position: relative;
  min-height: 420px;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #e9eef0;
  box-shadow: 0 30px 80px rgba(7, 20, 33, 0.12);
}

.stock-visual img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 420px;
  object-fit: cover;
  object-position: center;
}

.stock-visual figcaption {
  position: absolute;
  right: 16px;
  bottom: 16px;
  max-width: calc(100% - 32px);
  padding: 10px 12px;
  color: #fff;
  background: rgba(7, 20, 33, 0.68);
  font-size: 13px;
  font-weight: 800;
  backdrop-filter: blur(10px);
}

.intro {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 64px;
  padding: 92px 0;
}

.intro p:last-child,
.heatpump-info-copy p,
.config-copy p,
.features article p,
.process span {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.6;
}

.heatpump-info {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 38px;
  align-items: start;
  padding: 22px 0 86px;
}

.heatpump-info-copy {
  position: sticky;
  top: 118px;
}

.heatpump-info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.heatpump-info-grid article {
  display: grid;
  gap: 12px;
  min-height: 188px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    radial-gradient(circle at 100% 0%, rgba(14, 127, 168, 0.12), transparent 40%),
    #fff;
}

.heatpump-info-grid strong {
  font-size: 22px;
  line-height: 1.12;
}

.heatpump-info-grid span {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.5;
}

.configurator {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  gap: 56px;
  align-items: start;
  padding: 82px 0;
}

.config-copy {
  position: sticky;
  top: 118px;
}

.config-panel {
  display: grid;
  gap: 22px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: 0 30px 80px rgba(7, 20, 33, 0.12);
}

fieldset {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

legend,
.field span {
  display: block;
  margin-bottom: 10px;
  color: rgba(7, 20, 33, 0.8);
  font-size: 14px;
  font-weight: 800;
}

.segmented {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.segmented label {
  min-width: 0;
}

.segmented input {
  position: absolute;
  opacity: 0;
}

.segmented span {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  font-weight: 800;
  text-align: center;
}

.segmented input:checked + span {
  border-color: var(--brand-blue);
  color: #fff;
  background: var(--brand-blue);
}

select,
input[type="number"],
input[type="text"],
input[type="tel"],
input[type="email"],
input[type="range"] {
  width: 100%;
}

select,
input[type="number"],
input[type="text"],
input[type="tel"],
input[type="email"] {
  height: 54px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-weight: 700;
}

input[type="range"] {
  accent-color: var(--accent);
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.pv-benefits {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.pv-benefits span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 11px;
  border: 1px solid rgba(14, 127, 168, 0.24);
  border-radius: 999px;
  background: rgba(14, 127, 168, 0.08);
  color: var(--brand-blue);
  font-size: 13px;
  font-weight: 800;
}

.contact-fields {
  display: grid;
  gap: 14px;
  padding-top: 6px;
  border-top: 1px solid var(--line);
}

.checkbox-field {
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 10px;
  align-items: start;
}

.checkbox-field input {
  margin-top: 3px;
  accent-color: var(--brand-blue);
}

.checkbox-field span {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.45;
}

.result {
  padding: 24px;
  border-radius: 8px;
  color: #fff;
  background:
    radial-gradient(circle at 90% 20%, rgba(14, 127, 168, 0.42), transparent 34%),
    linear-gradient(135deg, #071421, #072a4b);
}

.result-label {
  display: inline-flex;
  margin-bottom: 16px;
  color: #8edaf1;
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.result p {
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.55;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 18px;
}

.result-grid span {
  display: grid;
  gap: 4px;
  padding: 14px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
}

.result-grid strong {
  color: #fff;
  font-size: 21px;
}

.features {
  padding: 86px 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 34px;
}

.feature-grid article {
  min-height: 250px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.icon {
  display: inline-flex;
  margin-bottom: 52px;
  color: var(--accent);
  font-weight: 900;
}

.process {
  display: grid;
  grid-template-columns: 0.8fr 1fr;
  gap: 54px;
  padding: 84px 0 110px;
}

.process ol {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.process li {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 18px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.final-cta {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 1.08fr);
  gap: 42px;
  align-items: center;
  margin-bottom: 92px;
  padding: 34px;
  border: 1px solid rgba(7, 42, 75, 0.14);
  background:
    radial-gradient(circle at 86% 8%, rgba(14, 127, 168, 0.16), transparent 36%),
    linear-gradient(135deg, #f6f8f9, #fff);
  box-shadow: 0 24px 70px rgba(7, 20, 33, 0.1);
}

.final-cta-copy p:last-child {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.55;
}

.quick-contact {
  display: grid;
  gap: 14px;
}

footer {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 30px max(20px, calc((100vw - 1120px) / 2));
  border-top: 1px solid var(--line);
  background: var(--paper);
  color: var(--muted);
}

footer div {
  display: grid;
  gap: 4px;
}

footer strong {
  color: var(--ink);
}

@media (max-width: 900px) {
  html {
    scroll-padding-top: 104px;
  }

  #konfigurator,
  #sofort-lieferbar,
  #waermepumpen-info,
  #vorteile,
  #ablauf {
    scroll-margin-top: 104px;
  }

  .site-header {
    grid-template-columns: 1fr auto;
  }

  .site-header nav {
    display: none;
  }

  .brand img {
    width: 238px;
  }

  .hero-content {
    transform: none;
  }

  .intro,
  .stock-section,
  .heatpump-info,
  .configurator,
  .final-cta,
  .process {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .heatpump-info-copy,
  .config-copy {
    position: static;
  }

  .heatpump-info-grid,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  footer {
    grid-template-columns: 1fr;
  }

  footer nav {
    justify-content: start;
  }
}

@media (max-width: 620px) {
  html {
    scroll-padding-top: 82px;
  }

  #konfigurator,
  #sofort-lieferbar,
  #waermepumpen-info,
  #vorteile,
  #ablauf {
    scroll-margin-top: 82px;
  }

  .site-header {
    top: 8px;
    width: calc(100% - 20px);
    min-height: 56px;
    padding: 8px 8px 8px 12px;
  }

  .header-cta {
    min-height: 34px;
    padding: 0 10px;
    font-size: 12px;
  }

  .brand img {
    width: 148px;
  }

  .site-header.is-compact {
    min-height: 48px;
    padding: 6px 8px 6px 10px;
  }

  .site-header.is-compact .brand img {
    width: 128px;
  }

  .site-header.is-compact .header-cta {
    min-height: 30px;
  }

  .hero {
    min-height: 205svh;
    padding-top: 0;
  }

  .hero-sticky {
    top: 0;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    min-height: 100svh;
    padding: 78px 20px 20px;
    background: #dbe7f2;
    overflow: visible;
  }

  .hero-image {
    transform: translateX(-50%);
  }

  .hero-before {
    object-position: center;
  }

  .hero-after {
    object-position: center;
  }

  .hero-overlay {
    background: linear-gradient(0deg, rgba(2, 8, 15, 0.82), rgba(2, 8, 15, 0.22));
  }

  .hero-content {
    align-self: end;
    width: 100%;
    margin: 0 0 18px;
    transform: none;
  }

  .hero-content::before {
    inset: -18px -20px -20px;
  }

  .hero .eyebrow {
    margin-bottom: clamp(150px, 28svh, 240px);
  }

  .cold-message {
    align-self: end;
    width: 100%;
    margin: 0 0 28px;
    transform: none;
  }

  h1 {
    font-size: 38px;
  }

  .hero-copy {
    font-size: 17px;
  }

  .hero-stats {
    position: relative;
    grid-template-columns: 1fr;
    gap: 8px;
    margin-top: 10px;
    right: auto;
    bottom: auto;
    left: auto;
    overflow: visible;
    border: 0;
    width: 100%;
  }

  .hero-stats span {
    grid-template-columns: 1fr;
    border: 1px solid rgba(255, 255, 255, 0.18);
    padding: 10px 14px;
  }

  .band,
  .stock-section,
  .heatpump-info,
  .configurator,
  .final-cta,
  .process {
    width: min(100% - 28px, 1120px);
  }

  .final-cta {
    margin-bottom: 56px;
    padding: 22px 16px;
  }

  .stock-section {
    padding: 56px 0 46px;
  }

  .stock-visual {
    min-height: 320px;
  }

  .warehouse-grid {
    inset: 24px 24px auto;
    grid-template-columns: repeat(2, 1fr);
  }

  .warehouse-grid span {
    height: 70px;
  }

  .heatpump-info {
    padding: 34px 0 62px;
  }

  .config-panel {
    padding: 16px;
  }

  .configurator {
    grid-template-columns: 1fr;
  }

  .segmented,
  .field-grid,
  .result-grid,
  .process li {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }
}