* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body {
    background-color: #ffffff;
    color: #333333;
    line-height: 1.8;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

nav {
    background-color: #ffffff;
    padding: 15px 20px;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    transition: transform 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

nav.hidden {
    transform: translateY(-100%);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5em;
    font-weight: 600;
    color: #007bff;
}

.nav-menu {
    display: flex;
    list-style: none;
}

.nav-menu li {
    margin: 0 20px;
}

.nav-menu li a {
    color: #333333;
    text-decoration: none;
    font-weight: 600;
    font-size: 1em;
    padding: 8px 12px;
    transition: color 0.3s, transform 0.3s;
}

.nav-menu li a:hover,
.nav-menu li a:focus {
    color: #007bff;
    transform: scale(1.1);
}

.nav-menu li a:focus {
    outline: 2px solid #007bff;
    outline-offset: 2px;
}

.nav-link.active {
    color: #007bff;
    transform: scale(1.1);
    border-bottom: 2px solid #007bff;
}

.hamburger {
    display: none;
    font-size: 1.5em;
    background: none;
    border: none;
    color: #333333;
    cursor: pointer;
}

header {
    text-align: center;
    padding: 100px 20px 60px;
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

header.visible {
    opacity: 1;
    transform: translateY(0);
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 15px;
    font-weight: 600;
    color: #333333;
}

header p {
    font-size: 1.1em;
    max-width: 700px;
    margin: 0 auto;
    color: #666666;
}

section {
    max-width: 900px;
    margin: 50px auto;
    padding: 30px;
    background-color: #f9f9f9;
    border-radius: 8px;
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

section.visible {
    opacity: 1;
    transform: translateY(0);
}

h2 {
    font-size: 1.8em;
    margin-bottom: 25px;
    text-align: center;
    font-weight: 600;
    color: #333333;
}

p {
    font-size: 1em;
    margin-bottom: 20px;
    color: #666666;
}

ul {
    list-style: none;
    margin-bottom: 30px;
}

ul li.project-item {
    margin: 15px 0;
    padding: 15px;
    background-color: #ffffff;
    border-radius: 6px;
    position: relative;
    transition: background 0.3s ease;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

ul li.project-item:hover {
    background-color: #f0f0f0;
}

ul li a.project-link {
    color: #007bff;
    text-decoration: none;
    font-size: 1em;
    display: block;
    transition: color 0.3s;
}

ul li a.project-link:hover,
ul li a.project-link:focus {
    color: #0056b3;
}

ul li a.project-link:focus {
    outline: 2px solid #007bff;
    outline-offset: 2px;
}

ul li a.project-link .project-title {
    font-weight: 600;
    margin-right: 5px;
}

.contact-section {
    text-align: center;
    background-color: #ffffff;
    padding: 40px;
    border-radius: 8px;
    margin-bottom: 50px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.contact-button {
    display: inline-block;
    padding: 12px 30px;
    background-color: #007bff;
    color: #ffffff;
    text-decoration: none;
    font-weight: 600;
    font-size: 1em;
    border-radius: 6px;
    transition: background 0.3s, transform 0.3s;
    border: none;
    cursor: pointer;
}

.contact-button:hover,
.contact-button:focus {
    background-color: #0056b3;
    transform: scale(1.05);
}

.contact-button:focus {
    outline: 2px solid #007bff;
    outline-offset: 2px;
}

.benefits {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 30px;
}

.benefit {
    flex: 1;
    padding: 20px;
    background-color: #ffffff;
    border-radius: 6px;
    text-align: center;
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.benefit.visible {
    opacity: 1;
    transform: translateY(0);
}

.benefit h3 {
    margin-bottom: 15px;
    color: #007bff;
    font-size: 1.2em;
}

.benefit p {
    margin-bottom: 0;
    color: #666666;
}

footer {
    text-align: center;
    padding: 30px 20px 60px;
    background-color: #f9f9f9;
    color: #666666;
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

footer.visible {
    opacity: 1;
    transform: translateY(0);
}

.impressum-link {
    color: #007bff;
    text-decoration: none;
    cursor: pointer;
    font-size: 1em;
}

.impressum-link:hover,
.impressum-link:focus {
    text-decoration: underline;
}

.impressum-link:focus {
    outline: 2px solid #007bff;
    outline-offset: 2px;
}

.impressum-popup {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.impressum-content {
    background-color: #ffffff;
    padding: 30px;
    border-radius: 8px;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    color: #333333;
}

.impressum-content h2 {
    color: #333333;
    font-size: 1.8em;
    margin-bottom: 20px;
}

.impressum-content p {
    color: #666666;
    font-size: 1em;
}

.close-button {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 1.5em;
    cursor: pointer;
    color: #007bff;
}

.close-button:focus {
    outline: 2px solid #007bff;
    outline-offset: 2px;
}

.preview-box {
    position: fixed;
    display: none;
    background-color: #ffffff;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    overflow: hidden;
    max-width: 300px;
    min-height: 100px;
}

.preview-box img {
    width: 100%;
    height: auto;
    display: block;
}

.preview-box.empty::after {
    content: 'Bild nicht verfügbar';
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100px;
    color: #333333;
    font-size: 14px;
    text-align: center;
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        flex-direction: column;
        width: 100%;
        background-color: #ffffff;
        position: absolute;
        top: 60px;
        left: 0;
        padding: 20px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    }

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

    .nav-menu li {
        margin: 10px 0;
    }

    .hamburger {
        display: block;
    }

    header {
        padding: 80px 20px 40px;
    }

    header h1 {
        font-size: 2em;
    }

    header p {
        font-size: 1em;
    }

    section {
        margin: 40px auto;
        padding: 20px;
    }

    .benefits {
        flex-direction: column;
        gap: 15px;
    }

    .benefit {
        padding: 15px;
    }

    .preview-box {
        max-width: 200px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.8em;
    }

    header p {
        font-size: 0.9em;
    }

    .contact-button {
        padding: 10px 25px;
        font-size: 0.9em;
    }

    .preview-box {
        max-width: 150px;
    }
}