:root {
            --bg: #0f1115;
            --bg-light: #f5f5f5;
            --card: #ffffff;
            --accent: #111111;
            --text: #222222;
        }

        * {
            box-sizing: border-box;
        }

        body {
            margin: 0;
            font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            color: var(--text);
            background: #fafafa;
            line-height: 1.6;
        }

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

        a:hover {
            text-decoration: underline;
        }

        img {
            max-width: 100%;
            display: block;
        }

        /* NAV + HERO */

        header {
            position: relative;
            min-height: 80vh;
            color: #ffffff;
            background: #000;
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url("images/projekt1_aussen.jpg");
            background-size: cover;
            background-position: center;
            filter: brightness(0.55);
            transform: scale(1.03);
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom, rgba(0,0,0,0.4), rgba(0,0,0,0.85));
        }

        .hero-inner {
            position: relative;
            max-width: 1100px;
            margin: 0 auto;
            padding: 22px 20px 60px;
            display: flex;
            flex-direction: column;
            min-height: 80vh;
        }

        .nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            margin-bottom: 40px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .logo img {
            height: 110px;
            margin-top: 10px;
        }

        .nav-links {
            display: flex;
            gap: 18px;
            font-size: 14px;
        }

        .nav-links a {
            opacity: 0.85;
        }

        .nav-links a:hover {
            opacity: 1;
            text-decoration: none;
        }

        .hero-content {
            margin-top: auto;
            max-width: 640px;
        }

        .hero-badge {
            display: inline-block;
            padding: 4px 10px;
            border-radius: 999px;
            border: 1px solid rgba(255,255,255,0.5);
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 0.16em;
            margin-bottom: 12px;
            opacity: 0.9;
        }

        .hero-content h1 {
            font-size: clamp(32px, 4vw, 44px);
            font-weight: 400;
            margin: 0 0 12px;
        }

        .hero-content p {
            margin: 0;
            font-size: 16px;
            opacity: 0.9;
        }

        .hero-cta {
            margin-top: 22px;
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }

        .btn-primary {
            background: #ffffff;
            color: #000;
            padding: 9px 18px;
            border-radius: 999px;
            font-size: 14px;
            border: none;
            cursor: pointer;
            font-weight: 500;
            box-shadow: 0 10px 26px rgba(0,0,0,0.35);
        }

        .btn-primary:hover {
            transform: translateY(-1px);
        }

        .hero-note {
            font-size: 13px;
            opacity: 0.85;
        }

        /* MAIN LAYOUT */

        main {
            max-width: 1100px;
            margin: -40px auto 40px;
            padding: 0 20px 60px;
        }

        section {
            margin-bottom: 50px;
        }

        .section-card {
            background: var(--card);
            border-radius: 16px;
            padding: 26px 22px 24px;
            box-shadow: 0 16px 45px rgba(0,0,0,0.08);
            border: 1px solid #e8e8e8;
        }

        .section-header {
            margin-bottom: 18px;
        }

        .section-label {
            font-size: 11px;
            letter-spacing: 0.16em;
            text-transform: uppercase;
            color: #777;
            margin-bottom: 4px;
        }

        .section-title {
            font-size: 22px;
            font-weight: 400;
            border-left: 4px solid #111;
            padding-left: 12px;
        }

        .muted {
            color: #555;
            font-size: 15px;
        }

        .brand {
            font-weight: 600;
            white-space: nowrap;
            letter-spacing: 0.04em;
        }

        .two-columns {
            display: grid;
            grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
            gap: 26px;
        }

        .pill-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 10px;
        }

        .pill {
            border-radius: 999px;
            border: 1px solid #ddd;
            padding: 5px 10px;
            font-size: 12px;
            background: #f7f7f7;
        }

        /* KATEGORIEN – WAS WIR BAUEN */

        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
            gap: 18px;
        }

        .category-card {
            border-radius: 8px;
            overflow: hidden;
            background: #ffffff;
            color: #000;
            position: relative;
            border: 1px solid #e4e4e4;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
            transition: transform 0.18s ease, box-shadow 0.18s ease;
        }

        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 10px 26px rgba(0,0,0,0.12);
        }

        .category-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
            border-radius: 8px 8px 0 0;
            transition: transform 0.3s ease;
        }

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

        .category-info {
            padding: 12px 14px 14px;
            background: #ffffff;
            border-top: 1px solid #e6e6e6;
        }

        .category-title {
            font-size: 15px;
            font-weight: 600;
            color: #000;
            margin-bottom: 4px;
        }

        .category-subtitle {
            font-size: 12px;
            color: #333;
        }

        /* Weitere Projekte */

        .project-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
            gap: 18px;
        }

        .project-card {
            border-radius: 8px;
            border: 1px solid #eee;
            padding: 14px 14px 16px;
            background: linear-gradient(135deg, #ffffff, #f8f8f8);
            box-shadow: 0 4px 12px rgba(0,0,0,0.03);
        }

        .project-tag {
            font-size: 10px;
            text-transform: uppercase;
            letter-spacing: 0.16em;
            color: #777;
            margin-bottom: 5px;
        }

        .project-title {
            font-size: 15px;
            margin: 0 0 4px;
        }

        .project-meta {
            font-size: 12px;
            color: #777;
            margin-bottom: 6px;
        }

        .project-text {
            font-size: 13px;
            color: #555;
        }


        /* 3D-Modelle – digitale Gebäudemodelle */

        .model-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
            gap: 18px;
            margin-top: 18px;
        }

        .model-card {
            border-radius: 8px;
            border: 1px solid #eee;
            background: #ffffff;
            box-shadow: 0 4px 12px rgba(0,0,0,0.04);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            cursor: pointer;
            transition: transform 0.18s ease, box-shadow 0.18s ease;
        }

        .model-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 26px rgba(0,0,0,0.12);
        }

        .model-thumb img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
        }

        .model-body {
            padding: 12px 14px 14px;
        }

        .model-title {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .model-meta {
            font-size: 12px;
            color: #777;
            margin-bottom: 10px;
        }

        .model-button {
            border: none;
            border-radius: 999px;
            padding: 7px 14px;
            font-size: 12px;
            font-weight: 500;
            cursor: pointer;
            background: #111111;
            color: #ffffff;
            box-shadow: 0 6px 16px rgba(0,0,0,0.18);
        }

        .model-button:hover {
            background: #222222;
        }


        /* TEAM */

        .team-portrait {
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 6px 18px rgba(0,0,0,0.08);
        }

        .team-portrait img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }

        .team-group {
            border-radius: 8px;
            overflow: hidden;
            margin-top: 18px;
            box-shadow: 0 6px 18px rgba(0,0,0,0.08);
        }

        /* KONTAKT */

        .contact-grid {
            display: grid;
            grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
            gap: 24px;
        }

        .contact-block p {
            margin: 0 0 6px;
            font-size: 14px;
        }

        .contact-highlight {
            font-size: 15px;
            font-weight: 500;
        }

        .social-links {
            margin-top: 12px;
        }

        .social-links-title {
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 6px;
        }

        .social-icons {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 4px;
        }

        .social-icons a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            border: 1px solid #ccc;
            background: #ffffff;
            padding: 4px;
            box-shadow: 0 2px 6px rgba(0,0,0,0.06);
            transition: transform 0.15s ease, box-shadow 0.15s ease;
        }

        .social-icons a:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 10px rgba(0,0,0,0.12);
        }

        .social-icons img {
            width: 26px;
            height: 26px;
            object-fit: contain;
        }

        footer {
            text-align: center;
            padding: 18px 20px 26px;
            font-size: 12px;
            color: #777;
            border-top: 1px solid #eee;
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            align-items: center;
            gap: 10px;
            margin-top: 8px;
        }

        .footer-nav a {
            margin: 0 6px;
        }

        .footer-logo {
            height: 24px;
        }

        /* Bild-Overlay (Lightbox) */

        .image-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.78);
            display: none;
            align-items: center;
            justify-content: center;
            z-index: 1000;
            padding: 20px;
        }

        .image-overlay.visible {
            display: flex;
        }

        .image-overlay-inner {
            background: #111;
            border-radius: 18px;
            max-width: 1000px;
            width: 100%;
            max-height: 90vh;
            padding: 12px 12px 16px;
            box-shadow: 0 20px 60px rgba(0,0,0,0.6);
        }

        .image-overlay img {
            width: 100%;
            max-height: 70vh;
            object-fit: contain;
            border-radius: 12px;
            background: #000;
        }

        .image-overlay-close {
            background: #ffffff;
            color: #000;
            border: none;
            border-radius: 999px;
            padding: 6px 16px;
            font-size: 13px;
            cursor: pointer;
            font-weight: 500;
            margin-bottom: 8px;
        }

        .image-overlay-close:hover {
            background: #f1f1f1;
        }

        .image-overlay-caption {
            margin-top: 8px;
            font-size: 13px;
            color: #eee;
        }

        /* Impressum & Datenschutz */

        .legal-text {
            font-size: 13px;
            color: #555;
        }

        .legal-text h3 {
            font-size: 15px;
            margin-top: 16px;
            margin-bottom: 6px;
        }

        .legal-text p {
            margin: 0 0 6px;
        }

        .legal-text ul {
            margin: 0 0 8px 18px;
            padding: 0;
        }

        .legal-text li {
            margin-bottom: 4px;
        }

        .legal-disclaimer {
            margin-top: 12px;
            font-size: 12px;
            color: #777;
        }

        /* RESPONSIVE */

        @media (max-width: 900px) {
            .two-columns,
            .contact-grid {
                grid-template-columns: minmax(0, 1fr);
            }
        }

        @media (max-width: 780px) {
            .nav {
                flex-direction: column;
                align-items: flex-start;
            }

            header {
                min-height: 70vh;
            }

            .hero-inner {
                min-height: 70vh;
            }

            .footer-bottom {
                flex-direction: column;
            }
        }

/* Ergänzungen für SEO, Barrierefreiheit und mobile Nutzung */
html {
    scroll-behavior: smooth;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 2000;
    background: #ffffff;
    color: #000000;
    padding: 10px 14px;
}

.skip-link:focus {
    left: 10px;
    top: 10px;
}

.section-title {
    margin: 0;
}

.space-bottom-18 {
    margin-bottom: 18px;
}

.space-top-26 {
    margin-top: 26px;
}

.space-top-10 {
    margin-top: 10px;
}

.align-start {
    align-items: start;
}

.person-name {
    margin-top: 0;
    margin-bottom: 4px;
    font-size: 18px;
}

.person-role {
    font-size: 13px;
    color: #777;
    margin-bottom: 10px;
}

.contact-link {
    text-decoration: underline;
    text-underline-offset: 2px;
}

@media (max-width: 780px) {
    .nav-links {
        flex-wrap: wrap;
        gap: 8px 14px;
    }

    .nav-links a {
        display: inline-flex;
        align-items: center;
        min-height: 44px;
    }
}