/* =========================================
   ELEKTROINSTALLATION (elektroinstallation.html)
   ========================================= */
main {
  display: block;
  padding-top: var(--header-height-desktop);
}

/* --- 1. INSTALLATION CARDS --- */
#pv21-install-section {
  max-width: 1280px;
  margin: 0 auto;
  font-family: inherit;
  padding: 60px 20px;
}

#pv21-install-section .section-title {
  font-size: 2.5rem;
  color: #1e293b;
  margin: 0 0 20px 0;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  line-height: 1.2;
}

#pv21-install-section .section-subtitle {
  color: #475569;
  max-width: 750px;
  margin: 0 auto;
  line-height: 1.6;
  font-size: 1.15rem;
  font-weight: 400;
}

#pv21-install-section .tech-grid-wrapper {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  align-items: stretch;
}

#pv21-install-section .tech-card-item {
  background: #ffffff;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
  border: 1px solid #e2e8f0;
  display: flex;
  flex-direction: column;
  height: 100%;
}

#pv21-install-section .tech-card-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 40px rgba(0, 176, 255, 0.15);
  border-color: #00b0ff;
}

#pv21-install-section .card-image-box {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #f1f5f9;
  border-bottom: 1px solid #e2e8f0;
}

#pv21-install-section .card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

#pv21-install-section .tech-card-item:hover .card-img {
  transform: scale(1.05);
}

#pv21-install-section .card-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to top, #ffffff, transparent);
  opacity: 0.3;
}

#pv21-install-section .card-content {
  padding: 30px 25px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

#pv21-install-section .card-content h3 {
  margin: 0 0 15px 0;
  color: #1e293b;
  font-size: 1.4rem;
  font-weight: 700;
}

#pv21-install-section .card-desc {
  color: #475569;
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 25px;
}

#pv21-install-section .tech-list {
  list-style: none;
  padding: 20px 0 0 0;
  margin: auto 0 0 0;
  border-top: 1px solid #e2e8f0;
}

#pv21-install-section .tech-list li {
  display: flex;
  align-items: center;
  padding: 8px 0;
  margin-bottom: 5px;
}

#pv21-install-section .list-icon {
  color: #00b0ff;
  font-weight: bold;
  margin-right: 15px;
  min-width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 176, 255, 0.1);
  border-radius: 50%;
  font-size: 0.8rem;
}

#pv21-install-section .list-text {
  color: #1e293b;
  font-size: 0.95rem;
  font-weight: 600;
}

@media (max-width: 768px) {
  #pv21-install-section .section-title {
    font-size: 1.8rem;
  }
  #pv21-install-section {
    padding: 40px 20px;
  }
}

/* --- 2. LICHTTECHNIK-DEMO --- */
#pv21-light-demo {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 20px;
  font-family: inherit;
}

#pv21-light-demo .demo-card {
  background: #ffffff;
  border-radius: 20px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
  display: flex;
  flex-wrap: wrap;
  overflow: hidden;
  border: 1px solid #e2e8f0;
}

#pv21-light-demo .column-visual {
  flex: 1 1 500px;
  background: #000;
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 450px;
}

#pv21-light-demo .image-wrapper {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
}

#pv21-light-demo .house-base,
#pv21-light-demo .house-effect {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  position: absolute;
  top: 0;
  left: 0;
}

#pv21-light-demo .house-effect {
  opacity: 0;
  transition: opacity 0.8s ease-in-out;
  z-index: 2;
}

#pv21-light-demo .house-effect.active {
  opacity: 1;
}

#pv21-light-demo .control-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  background: linear-gradient(to top, #000000 0%, rgba(0, 0, 0, 0.6) 70%, transparent 100%);
  padding: 60px 20px 30px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  z-index: 10;
  box-sizing: border-box;
}

#pv21-light-demo .power-button {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.4);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.4s ease;
}

#pv21-light-demo .power-button svg {
  width: 30px;
  height: 30px;
  stroke-width: 2px;
}

#pv21-light-demo .power-button:hover,
#pv21-light-demo .power-button:focus-visible {
  background: rgba(255, 255, 255, 0.4);
  transform: scale(1.1);
  border-color: #00b0ff;
  color: #00b0ff;
}

#pv21-light-demo .power-button.is-active {
  background: #00b0ff;
  border-color: #00b0ff;
  color: #fff;
  box-shadow: 0 0 35px rgba(0, 176, 255, 0.6);
}

#pv21-light-demo .status-badge {
  margin-top: 15px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.8);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8);
  pointer-events: none;
}

#pv21-light-demo .column-text {
  flex: 1 1 450px;
  padding: 50px 40px;
  display: flex;
  align-items: center;
  background: #ffffff;
  color: #1e293b;
}

#pv21-light-demo .content-inner {
  width: 100%;
}

#pv21-light-demo .tech-title {
  font-size: 2rem;
  color: #1e293b;
  margin: 0 0 30px 0;
  font-weight: 700;
  text-transform: uppercase;
  line-height: 1.1;
}

#pv21-light-demo .tech-intro {
  font-size: 1rem;
  color: #475569;
  line-height: 1.6;
  margin-bottom: 35px;
}

#pv21-light-demo .tech-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 15px;
}

#pv21-light-demo .tech-item {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  padding: 15px;
  border-radius: 12px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  transition: all 0.3s ease;
}

#pv21-light-demo .tech-item:hover {
  background: #ffffff;
  box-shadow: 0 10px 25px rgba(0, 176, 255, 0.1);
  transform: translateY(-3px);
  border-color: #00b0ff;
}

#pv21-light-demo .tech-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background: rgba(0, 176, 255, 0.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #00b0ff;
  transition: all 0.4s ease;
}

#pv21-light-demo .tech-icon svg {
  width: 22px;
  height: 22px;
}

#pv21-light-demo .tech-item:hover .tech-icon {
  background: #00b0ff;
  color: #ffffff;
  box-shadow: 0 0 10px rgba(0, 176, 255, 0.4);
}

#pv21-light-demo .tech-content h3 {
  margin: 0 0 4px 0;
  color: #1e293b;
  font-weight: 700;
  font-size: 1rem;
  transition: color 0.3s;
}

#pv21-light-demo .tech-item:hover .tech-content h3 {
  color: #00b0ff;
}

#pv21-light-demo .tech-content p {
  margin: 0;
  color: #475569;
  font-size: 0.9rem;
  line-height: 1.4;
}

@media (max-width: 900px) {
  #pv21-light-demo {
    padding: 40px 20px;
  }
  #pv21-light-demo .demo-card {
    flex-direction: column;
  }
  #pv21-light-demo .column-visual {
    width: 100%;
    height: auto;
    aspect-ratio: 4 / 3;
    flex: none;
    min-height: auto;
  }
  #pv21-light-demo .column-text {
    padding: 40px 25px;
  }
}

/* --- 3. E-CHECK --- */
#pv21-echeck-section {
  width: 100%;
  display: flex;
  justify-content: center;
  padding: 60px 20px;
  font-family: inherit;
}

#pv21-echeck-section .echeck-widget-box {
  width: 100%;
  max-width: 1200px;
  background: #ffffff;
  border-radius: 20px;
  border: 1px solid #e2e8f0;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
  padding: 50px 40px;
  color: #1e293b;
}

#pv21-echeck-section .echeck-header {
  text-align: center;
  margin-bottom: 50px;
  border-bottom: 1px solid #e2e8f0;
  padding-bottom: 30px;
}

#pv21-echeck-section .section-title {
  font-size: 2.2rem;
  color: #1e293b;
  margin: 0 0 15px 0;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

#pv21-echeck-section .section-subtitle {
  color: #475569;
  max-width: 750px;
  margin: 0 auto;
  line-height: 1.6;
  font-size: 1.1rem;
}

#pv21-echeck-section .echeck-split-wrapper {
  display: flex;
  align-items: flex-start;
  gap: 50px;
  margin-top: 40px;
}

#pv21-echeck-section .echeck-image-col {
  flex: 1;
  max-width: 500px;
}

#pv21-echeck-section .image-card {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  border: 1px solid #e2e8f0;
  line-height: 0;
}

#pv21-echeck-section .echeck-img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.5s ease;
}

#pv21-echeck-section .image-card:hover .echeck-img {
  transform: scale(1.05);
}

#pv21-echeck-section .cert-badge {
  position: absolute;
  top: 20px;
  left: 20px;
  background: rgba(0, 43, 69, 0.9);
  color: #fff;
  padding: 10px 16px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 0.9rem;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  display: flex;
  align-items: center;
  gap: 8px;
  border-left: 3px solid #00b0ff;
  backdrop-filter: blur(5px);
}

#pv21-echeck-section .echeck-text-col {
  flex: 1;
}

#pv21-echeck-section .hover-item {
  display: flex;
  align-items: flex-start;
  padding: 20px;
  margin-bottom: 15px;
  border-radius: 12px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  transition: all 0.3s ease;
}

#pv21-echeck-section .hover-item:hover {
  background: #ffffff;
  box-shadow: 0 10px 30px rgba(0, 176, 255, 0.15);
  transform: translateY(-3px);
  border-color: #00b0ff;
}

#pv21-echeck-section .info-icon {
  flex-shrink: 0;
  width: 45px;
  height: 45px;
  background: rgba(0, 176, 255, 0.1);
  color: #00b0ff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-right: 20px;
  transition: all 0.4s ease;
}

#pv21-echeck-section .hover-item:hover .info-icon {
  background: #00b0ff;
  color: #ffffff;
  box-shadow: 0 0 15px rgba(0, 176, 255, 0.4);
}

#pv21-echeck-section .info-content h3 {
  margin: 0 0 5px 0;
  color: #1e293b;
  font-size: 1.15rem;
  font-weight: 700;
  transition: color 0.3s;
}

#pv21-echeck-section .hover-item:hover h3 {
  color: #00b0ff;
}

#pv21-echeck-section .info-content p {
  margin: 0;
  color: #475569;
  line-height: 1.5;
  font-size: 0.95rem;
}

#pv21-echeck-section .norm-box {
  margin-top: 25px;
  padding: 15px 20px;
  background: #f1f5f9;
  border-left: 4px solid #00b0ff;
  color: #475569;
  font-size: 0.9rem;
  border-radius: 0 8px 8px 0;
}

#pv21-echeck-section .norm-box strong {
  color: #1e293b;
}

@media (max-width: 900px) {
  #pv21-echeck-section .echeck-widget-box {
    padding: 30px 20px;
  }
  #pv21-echeck-section .echeck-split-wrapper {
    flex-direction: column;
    gap: 30px;
    margin-top: 20px;
  }
  #pv21-echeck-section .echeck-image-col {
    max-width: 100%;
    width: 100%;
  }
  #pv21-echeck-section {
    padding: 40px 20px;
  }
  #pv21-echeck-section .section-title {
    font-size: 1.8rem;
  }
}