:root {
      --bg-dark: #0f172a;
      --bg-card: #1e293b;
      --bg-card-hover: #334155;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --primary: #dc2626;
      --primary-hover: #b91c1c;
      --accent-blue: #38bdf8;
      --border-color: #334155;
      --radius: 12px;
      --max-width: 1200px;
      --font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      font-family: var(--font-family);
      background-color: var(--bg-dark);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
    }

    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 1rem;
    }

    header {
      position: sticky;
      top: 0;
      z-index: 100;
      background-color: rgba(15, 23, 42, 0.9);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
    }

    .nav-wrapper {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 70px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      text-decoration: none;
      color: var(--text-main);
      font-weight: 800;
      font-size: 1.35rem;
      letter-spacing: -0.5px;
    }

    .logo-badge {
      background-color: var(--primary);
      color: #fff;
      padding: 0.25rem 0.6rem;
      border-radius: 6px;
      font-size: 1rem;
    }

    .nav-links {
      display: flex;
      gap: 1.5rem;
      list-style: none;
    }

    .nav-links a {
      color: var(--text-muted);
      text-decoration: none;
      font-weight: 500;
      transition: color 0.2s ease;
    }

    .nav-links a:hover {
      color: var(--primary);
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      color: var(--text-main);
      font-size: 1.5rem;
      cursor: pointer;
    }

    .hero {
      padding: 1.5rem 0 4rem;
      background: radial-gradient(circle at 50% 20%, rgba(220, 38, 38, 0.15) 0%, transparent 60%);
      text-align: center;
    }

    .badge-sub {
      display: inline-block;
      background-color: rgba(220, 38, 38, 0.15);
      color: var(--primary);
      border: 1px solid rgba(220, 38, 38, 0.3);
      padding: 0.35rem 1rem;
      border-radius: 50px;
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 1.5rem;
    }

    .b2b-banner {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      background-color: rgba(56, 189, 248, 0.1);
      border: 1px solid rgba(56, 189, 248, 0.3);
      color: var(--accent-blue);
      padding: 0.5rem 1.25rem;
      border-radius: 8px;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 1.5rem;
    }

    .hero h1 {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 1.25rem;
    }

    .hero h1 span {
      color: var(--primary);
    }

    .hero p {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 750px;
      margin: 0 auto 2rem;
    }

    .btn-group {
      display: flex;
      justify-content: center;
      gap: 1rem;
      flex-wrap: wrap;
    }

    /* Grafik unter den Hero-Buttons, klickbar wie die App-Screenshots. Breite je nach Bildschirmgroesse gestaffelt */
    .hero-image {
      display: inline-block;
      max-width: 70%;
      width: 100%;
      height: auto;
      margin-top: 2.5rem;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      cursor: pointer;
      transition: transform 0.2s ease, border-color 0.2s ease;
    }

    .hero-image:hover {
      transform: translateY(-4px);
      border-color: rgba(220, 38, 38, 0.5);
    }

    /* Auf Desktop-PCs (breite Bildschirme) die Grafik deutlich breiter darstellen */
    @media (min-width: 992px) {
      .hero-image {
        max-width: 92%;
      }
    }

    /* Auf schmalen Handy-Displays die Grafik ueber die volle Breite anzeigen */
    @media (max-width: 600px) {
      .hero-image {
        max-width: 100%;
      }
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      padding: 0.85rem 1.75rem;
      border-radius: 8px;
      font-weight: 600;
      text-decoration: none;
      cursor: pointer;
      transition: all 0.2s ease;
      border: none;
      font-size: 1rem;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #fff;
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
    }

    .btn-outline {
      background-color: transparent;
      color: var(--text-main);
      border: 1px solid var(--border-color);
    }

    .btn-outline:hover {
      background-color: var(--bg-card);
      border-color: var(--text-muted);
    }

    .btn-full {
      width: 100%;
    }

    section {
      padding: 4rem 0;
    }

    .section-header {
      text-align: center;
      margin-bottom: 3rem;
    }

    .section-header h2 {
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 0.5rem;
    }

    .section-header p {
      color: var(--text-muted);
      font-size: 1rem;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 1.5rem;
    }

    .card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 1.75rem;
      transition: transform 0.2s ease, border-color 0.2s ease;
    }

    .card:hover {
      transform: translateY(-4px);
      border-color: rgba(220, 38, 38, 0.5);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      background-color: rgba(220, 38, 38, 0.1);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      margin-bottom: 1.25rem;
    }

    .card h3 {
      font-size: 1.25rem;
      margin-bottom: 0.75rem;
    }

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

    .vorteile-section {
      background-color: rgba(30, 41, 59, 0.4);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .vorteil-box {
      display: flex;
      gap: 1.25rem;
      background-color: var(--bg-card);
      padding: 1.5rem;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
    }

    .vorteil-number {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1;
    }

    /* Shop Grid Layout */
    .shop-wrapper {
      display: grid;
      grid-template-columns: 1fr;
      gap: 2rem;
      margin-bottom: 2rem;
    }

    .configurator-wrapper {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 1.5rem;
    }

    .calc-table {
      width: 100%;
      border-collapse: collapse;
      margin-bottom: 1.5rem;
    }

    .calc-table th,
    .calc-table td {
      padding: 0.85rem 0.5rem;
      text-align: left;
      border-bottom: 1px solid var(--border-color);
    }

    .calc-table th:last-child,
    .calc-table td:last-child {
      text-align: right;
    }

    .calc-table th {
      color: var(--text-muted);
      font-size: 0.85rem;
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }

    /* Quantity Counter Styling */
    .qty-control {
      display: flex;
      align-items: center;
      gap: 0.35rem;
    }

    .btn-qty {
      width: 28px;
      height: 28px;
      background-color: var(--bg-dark);
      border: 1px solid var(--border-color);
      color: var(--text-main);
      border-radius: 4px;
      cursor: pointer;
      font-weight: bold;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: background-color 0.2s;
    }

    .btn-qty:hover {
      background-color: var(--primary);
      border-color: var(--primary);
    }

    .qty-input {
      width: 42px;
      height: 28px;
      background-color: var(--bg-dark);
      border: 1px solid var(--border-color);
      color: var(--text-main);
      text-align: center;
      border-radius: 4px;
      font-weight: 600;
      -webkit-appearance: textfield;
      -moz-appearance: textfield;
      appearance: textfield;
    }

    .qty-input::-webkit-outer-spin-button,
    .qty-input::-webkit-inner-spin-button {
      -webkit-appearance: none;
      margin: 0;
    }

    .price-tag {
      font-weight: 600;
      white-space: nowrap;
    }

    /* Product Table Thumbnail Styling */
    .prod-thumb {
      width: 48px;
      height: 48px;
      object-fit: cover;
      border-radius: 6px;
      border: 1px solid var(--border-color);
      cursor: pointer;
      transition: transform 0.2s ease, border-color 0.2s ease;
      background-color: #0b1120;
      display: block;
    }

    .prod-thumb:hover {
      transform: scale(1.1);
      border-color: var(--primary);
    }

    /* Zusätzliches Vorschaubild unter dem Artikelnamen, nur für sehr schmale Handy-Displays (siehe Media Query unten) */
    .prod-thumb-mobile {
      display: none;
    }

    /* App-Screenshots (gleicher Hover-Effekt wie bei den .card-Boxen) */
    .app-screenshots {
      display: flex;
      justify-content: center;
      align-items: flex-start;
      gap: 1.5rem;
      flex-wrap: wrap;
      margin-bottom: 2.5rem;
    }

    .app-screenshot {
      max-width: 220px;
      width: 100%;
      height: auto;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      cursor: pointer;
      transition: transform 0.2s ease, border-color 0.2s ease;
    }

    .app-screenshot:hover {
      transform: translateY(-4px);
      border-color: rgba(220, 38, 38, 0.5);
    }

    /* Lightbox Modal Styling */
    .lightbox-content {
      position: relative;
      max-width: 90vw;
      max-height: 85vh;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .lightbox-img {
      max-width: 100%;
      max-height: 75vh;
      border-radius: 8px;
      border: 2px solid var(--border-color);
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8);
      object-fit: contain;
      background-color: #0b1120;
    }

    .lightbox-caption {
      margin-top: 1rem;
      color: var(--text-main);
      font-weight: 600;
      font-size: 1.1rem;
      text-align: center;
    }

    .summary-box {
      background-color: var(--bg-dark);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 1.5rem;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }

    .summary-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .summary-total {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--primary);
    }

    .tax-info {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* Modal / Checkout Styling */
    .modal-overlay {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-color: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(8px);
      z-index: 1000;
      overflow-y: auto;
      padding: 2rem 1rem;
      align-items: center;
      justify-content: center;
    }

    .modal-overlay.active {
      display: flex;
    }

    .modal-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      width: 100%;
      max-width: 750px;
      padding: 2rem;
      box-shadow: 0 20px 25px -5px rgba(0,0,0,0.5);
      position: relative;
      margin: auto;
    }

    .modal-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 1rem;
      margin-bottom: 1.5rem;
    }

    .modal-close {
      background: none;
      border: none;
      color: var(--text-muted);
      font-size: 1.5rem;
      cursor: pointer;
    }

    .modal-close:hover {
      color: var(--primary);
    }

    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1rem;
    }

    @media (max-width: 600px) {
      .form-grid {
        grid-template-columns: 1fr;
      }
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 0.4rem;
      margin-bottom: 1rem;
    }

    .form-group.full-width {
      grid-column: 1 / -1;
    }

    .form-group label {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-control {
      background-color: var(--bg-dark);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      padding: 0.65rem 0.85rem;
      color: var(--text-main);
      font-family: inherit;
      font-size: 0.95rem;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
    }

    .payment-options {
      display: flex;
      gap: 1rem;
      margin-top: 0.5rem;
    }

    .payment-radio {
      flex: 1;
      display: flex;
      align-items: center;
      gap: 0.75rem;
      background-color: var(--bg-dark);
      border: 1px solid var(--border-color);
      padding: 0.85rem;
      border-radius: 8px;
      cursor: pointer;
      transition: border-color 0.2s;
    }

    .payment-radio:hover, .payment-radio.selected {
      border-color: var(--primary);
    }

    .payment-radio input {
      accent-color: var(--primary);
    }

    .shipping-box {
      background-color: rgba(15, 23, 42, 0.5);
      border: 1px dashed var(--border-color);
      border-radius: 8px;
      padding: 1rem;
      margin-top: 0.5rem;
      display: none;
    }

    .shipping-box.active {
      display: block;
    }

    .contact-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 2.5rem;
      text-align: center;
    }

    .contact-methods {
      display: flex;
      justify-content: center;
      gap: 2rem;
      margin: 2rem 0;
      flex-wrap: wrap;
    }

    .contact-item {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      background-color: var(--bg-dark);
      padding: 1rem 1.5rem;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      text-decoration: none;
      color: var(--text-main);
      transition: border-color 0.2s ease;
    }

    .contact-item:hover {
      border-color: var(--primary);
    }

    /* Formatierung für den Impressum- & Datenschutztext im Popup */
    .legal-content h3 {
      font-size: 1.3rem;
      font-weight: 700;
      color: var(--primary);
      margin: 1.75rem 0 0.75rem;
    }

    .legal-content h3:first-child {
      margin-top: 0;
    }

    .legal-content h4 {
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-main);
      margin: 1.25rem 0 0.5rem;
    }

    .legal-content p {
      color: var(--text-muted);
      font-size: 0.95rem;
      margin-bottom: 0.85rem;
    }

    .legal-content ul {
      color: var(--text-muted);
      font-size: 0.95rem;
      margin: -0.25rem 0 0.85rem 1.25rem;
    }

    .legal-content li {
      margin-bottom: 0.25rem;
    }

    .legal-content strong {
      color: var(--text-main);
    }

    footer {
      border-top: 1px solid var(--border-color);
      padding: 2rem 0;
      text-align: center;
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    @media (max-width: 768px) {
      .hero h1 {
        font-size: 2rem;
      }

      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--bg-card);
        flex-direction: column;
        padding: 1.5rem;
        border-bottom: 1px solid var(--border-color);
      }

      .nav-links.active {
        display: flex;
      }

      .mobile-toggle {
        display: block;
      }

      .calc-table th:nth-child(4),
      .calc-table td:nth-child(4) {
        display: none;
      }

      /* App-Screenshots auf dem Handy so breit wie die Vorteile-Boxen (untereinander, volle Breite) */
      .app-screenshots {
        flex-direction: column;
        align-items: stretch;
      }

      .app-screenshot {
        max-width: none;
      }
    }

    /* Unter 550px: Spalte "Bild" ausblenden, Vorschaubild stattdessen unter dem Artikelnamen anzeigen, und generell engere Abstände in der Shop-Tabelle */
    @media (max-width: 550px) {
      .container {
        padding: 0 0.65rem;
      }

      .calc-table th:nth-child(2),
      .calc-table td:nth-child(2) {
        display: none;
      }

      .prod-thumb-mobile {
        display: block;
        margin-top: 0.5rem;
      }

      .configurator-wrapper {
        padding: 0.85rem;
      }

      .calc-table th,
      .calc-table td {
        padding: 0.5rem 0.3rem;
      }

      .qty-control {
        gap: 0.2rem;
      }

      .btn-qty {
        width: 24px;
        height: 24px;
      }

      .qty-input {
        width: 32px;
        height: 24px;
      }

      /* Lange Artikelnamen notfalls auch mitten im Wort umbrechen, damit die Tabelle nicht auseinanderbricht */
      .calc-table td {
        overflow-wrap: anywhere;
        word-break: break-word;
      }
    }