/* ==========================================================================
   Elektro Dürmeyer – Modernes, modulares Stylesheet (Vanilla CSS3)
   Gliederung:
   1. CSS-Variablen (:root) – Design & CI
   2. Reset & Base Typography
   3. Layout & Utility-Klassen
   4. Topbar, Header & Navigation
   5. Hero-Sektion
   6. Über uns, Historie & Werte
   7. Leistungen & SmartHome
   8. Verkaufsraum & Öffnungszeiten
   9. Referenzen (Filter, Grid & Lightbox-Modal)
   10. Team, Zertifikate & Karriere
   11. Marken-Banner
   12. Kontaktformular & Kontaktdaten
   13. Rechtliche Seiten (Impressum & Datenschutz)
   14. Footer & Back-to-Top
   15. Responsive Media Queries
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS-Variablen (:root)
   -------------------------------------------------------------------------- */
:root {
  /* CI-Farben Elektro Dürmeyer */
  --color-accent: #EAA824;
  --color-accent-bright: #F1B522;
  --color-accent-dark: #C98B14;
  --color-accent-soft: rgba(234, 168, 36, 0.14);
  --color-red-logo: #C62828;

  /* Dunkle Basis */
  --color-dark-900: #1E1E1E;
  --color-dark-800: #252525;
  --color-dark-700: #2B2B2B;
  --color-dark-600: #3A3A3A;

  /* Helle Hintergründe & Oberflächen */
  --color-bg-light: #F8F9FA;
  --color-bg-warm: #F4F5F7;
  --color-surface: #FFFFFF;
  --color-border: #E2E5E9;
  --color-border-strong: #CBD0D6;

  /* Textfarben */
  --color-text: #1E1E1E;
  --color-text-muted: #525866;
  --color-text-light: #9CA3AF;
  --color-text-inverse: #FFFFFF;

  /* Statusfarben */
  --color-success: #15803D;
  --color-success-bg: #DCFCE7;
  --color-error: #B91C1C;
  --color-error-bg: #FEE2E2;

  /* Typografie (DSGVO-konformer System-Font-Stack ohne externe CDNs) */
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-heading: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  /* Spacing & Layout */
  --container-max: 1240px;
  --container-pad: 1.5rem;
  --section-py: clamp(4rem, 7vw, 6.5rem);

  --space-2xs: 0.25rem;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Radien & Schatten */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 8px rgba(30, 30, 30, 0.06);
  --shadow-md: 0 10px 28px rgba(30, 30, 30, 0.09);
  --shadow-lg: 0 20px 44px rgba(30, 30, 30, 0.16);
  --shadow-accent: 0 8px 24px rgba(234, 168, 36, 0.28);

  /* Animation */
  --transition-fast: 180ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 280ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* --------------------------------------------------------------------------
   2. Reset & Base Typography
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-surface);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img,
picture,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

ul,
ol {
  list-style: none;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 800;
  line-height: 1.2;
  color: var(--color-dark-900);
  letter-spacing: -0.02em;
}

p + p {
  margin-top: 1rem;
}

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: 9999;
  padding: 0.75rem 1.25rem;
  background: var(--color-accent);
  color: var(--color-dark-900);
  font-weight: 700;
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  top: 1rem;
}

/* --------------------------------------------------------------------------
   3. Layout & Utility-Klassen
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

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

.section--light {
  background-color: var(--color-bg-light);
}

.section--white {
  background-color: var(--color-surface);
}

.section--dark {
  background-color: var(--color-dark-900);
  color: var(--color-text-inverse);
}

.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: var(--color-text-inverse);
}

.section-header {
  max-width: 720px;
  margin-bottom: var(--space-2xl);
}

.section-header--center {
  margin-inline: auto;
  text-align: center;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.85rem;
  margin-bottom: 0.85rem;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-dark-900);
  background-color: var(--color-accent);
  border-radius: var(--radius-full);
}

.section--dark .section-eyebrow {
  background-color: rgba(234, 168, 36, 0.2);
  color: var(--color-accent-bright);
  border: 1px solid rgba(234, 168, 36, 0.4);
}

.section-title {
  font-size: clamp(1.85rem, 3.2vw, 2.65rem);
  margin-bottom: 0.85rem;
}

.section-lead {
  font-size: 1.08rem;
  color: var(--color-text-muted);
}

.section--dark .section-lead {
  color: #D1D5DB;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.88rem 1.65rem;
  font-size: 0.98rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  text-align: center;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-dark-900);
  box-shadow: var(--shadow-accent);
}

.btn--primary:hover {
  background-color: var(--color-accent-bright);
}

.btn--dark {
  background-color: var(--color-dark-900);
  color: var(--color-text-inverse);
}

.btn--dark:hover {
  background-color: var(--color-dark-700);
  color: var(--color-accent-bright);
}

.btn--outline-light {
  background-color: transparent;
  color: var(--color-text-inverse);
  border-color: rgba(255, 255, 255, 0.45);
}

.btn--outline-light:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: var(--color-accent-bright);
  color: var(--color-accent-bright);
}

.btn--outline-dark {
  background-color: transparent;
  color: var(--color-dark-900);
  border-color: var(--color-dark-900);
}

.btn--outline-dark:hover {
  background-color: var(--color-dark-900);
  color: var(--color-accent-bright);
}

/* --------------------------------------------------------------------------
   4. Topbar, Header & Navigation
   -------------------------------------------------------------------------- */
.topbar {
  background-color: var(--color-dark-900);
  color: #E5E7EB;
  font-size: 0.86rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.topbar__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem 1.5rem;
  padding-block: 0.55rem;
}

.topbar__group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
}

.topbar__item {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: #E5E7EB;
}

.topbar__item i {
  color: var(--color-accent-bright);
}

.topbar__item:hover {
  color: var(--color-accent-bright);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(10px);
  border-bottom: 3px solid var(--color-accent);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-md);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 82px;
  gap: 1rem;
}

.navbar__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.navbar__logo {
  height: 56px;
  width: auto;
  object-fit: contain;
}

.navbar__menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.navbar__link {
  position: relative;
  display: inline-block;
  padding: 0.55rem 0.9rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-dark-800);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.navbar__link:hover,
.navbar__link.is-active {
  color: var(--color-dark-900);
  background-color: var(--color-accent-soft);
}

.navbar__link.is-active::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 0.9rem;
  right: 0.9rem;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: 2px;
}

.navbar__cta {
  margin-left: 0.5rem;
  padding: 0.6rem 1.15rem;
  font-size: 0.9rem;
}

.navbar__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  color: var(--color-dark-900);
  font-size: 1.5rem;
}

/* --------------------------------------------------------------------------
   5. Hero-Sektion
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: clamp(560px, 82vh, 780px);
  display: flex;
  align-items: center;
  background-color: var(--color-dark-900);
  color: var(--color-text-inverse);
  overflow: hidden;
}

.hero__slides {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transform: scale(1.04);
  transition: opacity 1.2s ease-in-out, transform 6s ease-out;
}

.hero__slide.is-active {
  opacity: 1;
  transform: scale(1);
}

.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    115deg,
    rgba(24, 24, 24, 0.92) 0%,
    rgba(30, 30, 30, 0.82) 55%,
    rgba(30, 30, 30, 0.65) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 2;
  padding-block: 4.5rem;
  width: 100%;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 3rem;
  align-items: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.4rem 1rem;
  margin-bottom: 1.25rem;
  background-color: rgba(234, 168, 36, 0.18);
  border: 1px solid var(--color-accent);
  color: var(--color-accent-bright);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero__title {
  font-size: clamp(2.25rem, 4.6vw, 3.75rem);
  color: var(--color-text-inverse);
  margin-bottom: 1.25rem;
  line-height: 1.12;
}

.hero__title span {
  color: var(--color-accent-bright);
}

.hero__subtitle {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  color: #E5E7EB;
  max-width: 640px;
  margin-bottom: 2rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.hero__trust {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
  padding-top: 1.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  max-width: 620px;
}

.hero__stat-value {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-accent-bright);
  line-height: 1.2;
}

.hero__stat-label {
  font-size: 0.85rem;
  color: #D1D5DB;
}

.hero__card {
  background: rgba(30, 30, 30, 0.85);
  border: 1px solid rgba(234, 168, 36, 0.35);
  border-top: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(8px);
}

.hero__card-header {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}

.hero__card-header img {
  width: 48px;
  height: 48px;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.hero__card-title {
  font-size: 1.15rem;
  color: var(--color-text-inverse);
  margin: 0;
}

.hero__card-sub {
  font-size: 0.85rem;
  color: var(--color-accent-bright);
}

.hero__card-list {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  font-size: 0.94rem;
  color: #E5E7EB;
}

.hero__card-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
}

.hero__card-list i {
  color: var(--color-accent-bright);
  margin-top: 0.2rem;
}

/* --------------------------------------------------------------------------
   6. Über uns, Historie & Werte
   -------------------------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3.5rem;
  align-items: start;
}

.timeline {
  position: relative;
  margin-top: 1.75rem;
  padding-left: 1.5rem;
  border-left: 3px solid var(--color-accent);
  display: grid;
  gap: 1.35rem;
}

.timeline__item {
  position: relative;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -1.95rem;
  top: 0.35rem;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background-color: var(--color-accent);
  border: 3px solid var(--color-surface);
  box-shadow: 0 0 0 2px var(--color-accent);
}

.timeline__year {
  display: inline-block;
  font-weight: 800;
  font-size: 0.92rem;
  color: var(--color-accent-dark);
  margin-bottom: 0.15rem;
}

.timeline__text {
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.about-gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.about-figure {
  background: var(--color-bg-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.about-figure--wide {
  grid-column: 1 / -1;
}

.about-figure img {
  width: 100%;
  height: 230px;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.about-figure--wide img {
  height: 270px;
}

.about-figure:hover img {
  transform: scale(1.03);
}

.about-figure figcaption {
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-surface);
}

/* Werte-Karten */
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
  margin-top: 3.5rem;
}

.value-card {
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.value-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.value-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background-color: var(--color-accent);
  color: var(--color-dark-900);
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}

.value-card__title {
  font-size: 1.25rem;
  margin-bottom: 0.65rem;
}

.value-card__text {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* --------------------------------------------------------------------------
   7. Leistungen & SmartHome
   -------------------------------------------------------------------------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2.25rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

.service-card__top {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.service-card__icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  background: var(--color-dark-900);
  color: var(--color-accent-bright);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  flex-shrink: 0;
}

.service-card__title {
  font-size: 1.35rem;
}

.service-card__desc {
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
}

.service-card__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem 1rem;
  margin-top: auto;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.92rem;
  font-weight: 600;
}

.service-card__list li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.service-card__list i {
  color: var(--color-accent-dark);
}

/* SmartHome Banner */
.smarthome-banner {
  margin-top: 2.5rem;
  background: var(--color-dark-900);
  color: var(--color-text-inverse);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2.5rem;
  align-items: center;
  border-left: 6px solid var(--color-accent);
  box-shadow: var(--shadow-md);
}

.smarthome-banner h3 {
  color: var(--color-text-inverse);
  font-size: 1.65rem;
  margin-bottom: 0.75rem;
}

.smarthome-banner p {
  color: #D1D5DB;
  margin-bottom: 1.5rem;
}

.smarthome-banner__img {
  background: var(--color-surface);
  padding: 1rem;
  border-radius: var(--radius-md);
}

/* --------------------------------------------------------------------------
   8. Verkaufsraum & Öffnungszeiten
   -------------------------------------------------------------------------- */
.shop-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3rem;
  align-items: center;
}

.hours-card {
  margin-top: 1.75rem;
  background: var(--color-dark-900);
  color: var(--color-text-inverse);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  border-left: 5px solid var(--color-accent);
}

.hours-card__title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--color-accent-bright);
  font-size: 1.15rem;
  margin-bottom: 1rem;
}

.hours-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.hours-table td {
  padding: 0.45rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.hours-table tr:last-child td {
  border-bottom: none;
}

.hours-table td:first-child {
  font-weight: 700;
  color: #FFFFFF;
  width: 38%;
}

.hours-table td:last-child {
  color: #E5E7EB;
}

.shop-gallery {
  display: grid;
  gap: 1.25rem;
}

.shop-gallery__item {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  position: relative;
}

.shop-gallery__item img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.shop-gallery__item:hover img {
  transform: scale(1.03);
}

.shop-features {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.25rem;
}

.shop-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.85rem;
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.86rem;
  font-weight: 600;
}

.shop-tag i {
  color: var(--color-accent-dark);
}

/* Interaktiver Bild-Slider (Carousel) */
.carousel {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  background: var(--color-dark-900);
}

.carousel__viewport {
  position: relative;
  height: 430px;
  overflow: hidden;
}

.carousel__slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.45s ease;
  display: flex;
  flex-direction: column;
}

.carousel__slide.is-active {
  opacity: 1;
  pointer-events: auto;
  z-index: 1;
}

.carousel__slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  cursor: pointer;
  transition: transform 0.5s ease;
}

.carousel__slide:hover img {
  transform: scale(1.03);
}

.carousel__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 2.25rem 1.25rem 1rem;
  background: linear-gradient(to top, rgba(18, 18, 18, 0.92) 0%, rgba(18, 18, 18, 0.55) 60%, transparent 100%);
  color: var(--color-text-inverse);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  pointer-events: none;
}

.carousel__caption strong {
  display: block;
  font-size: 1rem;
  color: var(--color-accent-bright);
}

.carousel__caption span {
  font-size: 0.85rem;
  color: #E5E7EB;
}

.carousel__zoom-hint {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  background: rgba(234, 168, 36, 0.95);
  color: var(--color-dark-900);
  font-size: 0.78rem;
  font-weight: 700;
  white-space: nowrap;
}

.carousel__btn {
  position: absolute;
  top: 44%;
  transform: translateY(-50%);
  z-index: 3;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(30, 30, 30, 0.82);
  color: #FFFFFF;
  border: 1px solid rgba(255, 255, 255, 0.25);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.carousel__btn:hover {
  background: var(--color-accent);
  color: var(--color-dark-900);
}

.carousel__btn--prev {
  left: 0.85rem;
}

.carousel__btn--next {
  right: 0.85rem;
}

.carousel__thumbs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  padding: 0.65rem;
  background: var(--color-dark-800);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.carousel__thumb {
  position: relative;
  height: 64px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 2px solid transparent;
  opacity: 0.6;
  transition: opacity var(--transition-fast), border-color var(--transition-fast);
}

.carousel__thumb:hover,
.carousel__thumb.is-active {
  opacity: 1;
  border-color: var(--color-accent);
}

.carousel__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* --------------------------------------------------------------------------
   9. Referenzen (Filter, Grid & Lightbox-Modal)
   -------------------------------------------------------------------------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
  margin-bottom: 2.5rem;
}

.filter-btn {
  padding: 0.6rem 1.25rem;
  font-size: 0.92rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  background-color: var(--color-surface);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-dark-900);
}

.filter-btn.is-active {
  background-color: var(--color-dark-900);
  color: var(--color-accent-bright);
  border-color: var(--color-dark-900);
}

.ref-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.ref-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.ref-card[hidden] {
  display: none !important;
}

.ref-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.ref-card__media {
  position: relative;
  height: 240px;
  overflow: hidden;
  background: var(--color-dark-800);
  cursor: pointer;
}

.ref-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s ease;
}

.ref-card:hover .ref-card__media img {
  transform: scale(1.06);
}

.ref-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(20, 20, 20, 0.78) 0%, rgba(20, 20, 20, 0.1) 60%);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.ref-card:hover .ref-card__overlay,
.ref-card__media:focus-visible .ref-card__overlay {
  opacity: 1;
}

.ref-card__zoom {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.85rem;
  background: var(--color-accent);
  color: var(--color-dark-900);
  font-size: 0.82rem;
  font-weight: 700;
  border-radius: var(--radius-full);
}

.ref-card__count {
  position: absolute;
  top: 0.85rem;
  right: 0.85rem;
  background: rgba(30, 30, 30, 0.82);
  color: var(--color-text-inverse);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.ref-card__body {
  padding: 1.35rem 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.ref-card__category {
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent-dark);
  margin-bottom: 0.35rem;
}

.ref-card__title {
  font-size: 1.18rem;
  margin-bottom: 0.45rem;
}

.ref-card__text {
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

/* Lightbox Modal */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(18, 18, 18, 0.92);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.lightbox.is-open {
  opacity: 1;
  pointer-events: auto;
}

.lightbox__dialog {
  position: relative;
  max-width: 1020px;
  width: 100%;
  background: var(--color-dark-800);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.lightbox__stage {
  position: relative;
  background: #111;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 360px;
  max-height: 72vh;
}

.lightbox__img {
  max-height: 72vh;
  width: auto;
  max-width: 100%;
  object-fit: contain;
}

.lightbox__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  z-index: 10;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(30, 30, 30, 0.85);
  color: #FFF;
  font-size: 1.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: background-color var(--transition-fast);
}

.lightbox__close:hover {
  background: var(--color-accent);
  color: var(--color-dark-900);
}

.lightbox__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: rgba(30, 30, 30, 0.8);
  color: #FFF;
  font-size: 1.35rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: background-color var(--transition-fast);
}

.lightbox__nav:hover {
  background: var(--color-accent);
  color: var(--color-dark-900);
}

.lightbox__nav--prev {
  left: 1rem;
}

.lightbox__nav--next {
  right: 1rem;
}

.lightbox__footer {
  padding: 1.15rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: var(--color-text-inverse);
}

.lightbox__caption-title {
  font-size: 1.1rem;
  color: var(--color-accent-bright);
  margin-bottom: 0.2rem;
}

.lightbox__caption-desc {
  font-size: 0.92rem;
  color: #D1D5DB;
}

.lightbox__counter {
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.1);
}

/* --------------------------------------------------------------------------
   10. Team, Zertifikate & Karriere
   -------------------------------------------------------------------------- */
.team-career-grid {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 2.5rem;
  align-items: stretch;
}

.profile-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2.25rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.profile-card__header {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.profile-card__avatar {
  width: 116px;
  height: 116px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center 22%;
  border: 4px solid var(--color-accent);
  flex-shrink: 0;
}

.profile-card__role {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent-dark);
  margin-bottom: 0.25rem;
}

.profile-card__name {
  font-size: 1.45rem;
  margin-bottom: 0.25rem;
}

.profile-card__quals {
  display: grid;
  gap: 0.55rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.93rem;
}

.profile-card__quals li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.profile-card__quals i {
  color: var(--color-accent-dark);
}

.cert-preview {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--color-bg-light);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.cert-preview:hover {
  border-color: var(--color-accent);
}

.cert-preview img {
  width: 84px;
  height: 60px;
  object-fit: cover;
  border-radius: 4px;
  flex-shrink: 0;
}

/* Karriere-Box */
.career-card {
  background: var(--color-dark-900);
  color: var(--color-text-inverse);
  border-radius: var(--radius-md);
  padding: 2.5rem;
  border-top: 5px solid var(--color-accent);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
}

.career-card__badge {
  align-self: flex-start;
  background: var(--color-accent);
  color: var(--color-dark-900);
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
}

.career-card__title {
  color: var(--color-text-inverse);
  font-size: 1.65rem;
  margin-bottom: 0.75rem;
}

.career-card__lead {
  color: #D1D5DB;
  margin-bottom: 1.5rem;
}

.career-cols {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.career-cols h4 {
  color: var(--color-accent-bright);
  font-size: 1rem;
  margin-bottom: 0.65rem;
}

.career-list {
  display: grid;
  gap: 0.45rem;
  font-size: 0.92rem;
  color: #E5E7EB;
}

.career-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.career-list i {
  color: var(--color-accent-bright);
  margin-top: 0.2rem;
}

.career-actions {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

/* --------------------------------------------------------------------------
   11. Marken-Banner
   -------------------------------------------------------------------------- */
.brands-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(135px, 1fr));
  gap: 1.25rem;
  align-items: center;
}

.brand-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1.15rem 1.25rem;
  height: 88px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.brand-item:hover {
  transform: translateY(-3px);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-sm);
}

.brand-item img {
  max-height: 48px;
  max-width: 120px;
  width: auto;
  object-fit: contain;
}

/* --------------------------------------------------------------------------
   12. Kontaktformular & Kontaktdaten
   -------------------------------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 3rem;
  align-items: start;
}

.contact-info-list {
  display: grid;
  gap: 1.25rem;
  margin-top: 2rem;
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.contact-info-item__icon {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-sm);
  background: var(--color-accent);
  color: var(--color-dark-900);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.contact-info-item h3 {
  font-size: 1.05rem;
  margin-bottom: 0.2rem;
}

.contact-info-item p,
.contact-info-item a {
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.contact-info-item a:hover {
  color: var(--color-accent-dark);
}

.contact-form-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 0.45rem;
  color: var(--color-dark-900);
}

.form-control {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background-color: var(--color-bg-light);
  font-size: 0.96rem;
  transition: border-color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-accent);
  background-color: var(--color-surface);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.form-control.is-invalid {
  border-color: var(--color-error);
  background-color: #FFF5F5;
}

textarea.form-control {
  resize: vertical;
  min-height: 130px;
}

/* Unsichtbares Honeypot-Feld für Spamschutz */
.hp-field {
  position: absolute !important;
  left: -9999px !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

.form-check {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.form-check input[type="checkbox"] {
  width: 1.15rem;
  height: 1.15rem;
  margin-top: 0.2rem;
  accent-color: var(--color-accent);
  flex-shrink: 0;
  cursor: pointer;
}

.form-check a {
  color: var(--color-dark-900);
  font-weight: 700;
  text-decoration: underline;
}

.form-feedback {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.25rem;
  font-size: 0.94rem;
  font-weight: 600;
  display: none;
}

.form-feedback.is-visible {
  display: block;
}

.form-feedback--success {
  background-color: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid #86EFAC;
}

.form-feedback--error {
  background-color: var(--color-error-bg);
  color: var(--color-error);
  border: 1px solid #FCA5A5;
}

/* --------------------------------------------------------------------------
   13. Rechtliche Seiten (Impressum & Datenschutz)
   -------------------------------------------------------------------------- */
.legal-header {
  background: var(--color-dark-900);
  color: var(--color-text-inverse);
  padding-block: 3.5rem;
  border-bottom: 4px solid var(--color-accent);
}

.legal-header h1 {
  color: var(--color-text-inverse);
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  margin-bottom: 0.5rem;
}

.legal-content {
  max-width: 860px;
  margin-inline: auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: clamp(1.75rem, 4vw, 3rem);
  box-shadow: var(--shadow-sm);
}

.legal-content h2 {
  font-size: 1.35rem;
  margin-top: 2rem;
  margin-bottom: 0.65rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--color-accent-soft);
}

.legal-content h2:first-child {
  margin-top: 0;
}

.legal-content h3 {
  font-size: 1.1rem;
  margin-top: 1.35rem;
  margin-bottom: 0.4rem;
}

.legal-content ul {
  list-style: disc;
  padding-left: 1.5rem;
  margin-block: 0.75rem;
}

.legal-content li + li {
  margin-top: 0.35rem;
}

.legal-content a {
  color: var(--color-accent-dark);
  font-weight: 600;
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   14. Footer & Back-to-Top
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--color-dark-900);
  color: #D1D5DB;
  border-top: 4px solid var(--color-accent);
  padding-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1.1fr;
  gap: 2.5rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-title {
  color: var(--color-text-inverse);
  font-size: 1.05rem;
  margin-bottom: 1rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.footer-title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 36px;
  height: 3px;
  background: var(--color-accent);
}

.footer-links {
  display: grid;
  gap: 0.55rem;
  font-size: 0.93rem;
}

.footer-links a:hover {
  color: var(--color-accent-bright);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-block: 1.5rem;
  font-size: 0.88rem;
  color: #9CA3AF;
}

.footer-bottom__links {
  display: flex;
  gap: 1.5rem;
}

.footer-bottom__links a:hover {
  color: var(--color-accent-bright);
}

/* --------------------------------------------------------------------------
   15. Responsive Media Queries
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero__grid,
  .about-grid,
  .shop-grid,
  .team-career-grid,
  .contact-grid,
  .smarthome-banner {
    grid-template-columns: 1fr;
  }

  .ref-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 860px) {
  .navbar__toggle {
    display: inline-flex;
  }

  .navbar__menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    flex-direction: column;
    align-items: stretch;
    padding: 1rem var(--container-pad) 1.5rem;
    border-bottom: 3px solid var(--color-accent);
    box-shadow: var(--shadow-md);
    display: none;
  }

  .navbar__menu.is-open {
    display: flex;
  }

  .navbar__link {
    padding: 0.75rem 1rem;
  }

  .navbar__cta {
    margin-left: 0;
    margin-top: 0.5rem;
  }

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

@media (max-width: 640px) {
  .topbar__inner {
    justify-content: center;
    text-align: center;
  }

  .hero__trust {
    grid-template-columns: 1fr;
    gap: 0.85rem;
  }

  .about-gallery,
  .values-grid,
  .ref-grid,
  .career-cols,
  .form-row,
  .footer-grid,
  .service-card__list {
    grid-template-columns: 1fr;
  }

  .profile-card__header {
    flex-direction: column;
    text-align: center;
  }

  .contact-form-card,
  .career-card,
  .service-card {
    padding: 1.5rem;
  }
}