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

:root {
    --primary-color: #1e3a8a;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --accent-color: #f59e0b;
    --accent-dark: #d97706;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 20px;
}

.nav-brand {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

.nav-menu a:hover,
.nav-menu a:focus {
    color: var(--primary-color);
    outline: 2px solid var(--accent-color);
    outline-offset: 4px;
    border-radius: 4px;
}

.nav-menu a:hover::after,
.nav-menu a:focus::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--text-dark);
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    text-align: center;
    overflow: hidden;
}

.hero-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('https://images.unsplash.com/photo-1519167758481-83f550bb49b3?w=1920&h=1080&fit=crop');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

@media (min-width: 769px) {
    .hero-image {
        background-attachment: fixed;
    }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.85) 0%, rgba(30, 64, 175, 0.75) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    padding: 0 20px;
    animation: fadeInUp 1s ease;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 1rem;
    opacity: 0.95;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
    line-height: 1.8;
}

.cta-button {
    display: inline-block;
    padding: 1.2rem 3rem;
    background: var(--accent-color);
    color: var(--bg-white);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(245, 158, 11, 0.4);
}

.cta-button:hover,
.cta-button:focus {
    background: var(--accent-dark);
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(245, 158, 11, 0.5);
    outline: 3px solid rgba(255, 255, 255, 0.5);
    outline-offset: 2px;
}

/* Services Section */
.services {
    padding: 100px 0;
    background: var(--bg-white);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 3rem;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--bg-white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.service-image {
    width: 100%;
    height: 200px;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    transition: transform 0.3s ease;
}

.service-card:hover .service-image {
    transform: scale(1.05);
}

.service-content {
    padding: 2rem;
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.service-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* About Section */
.about {
    padding: 100px 0;
    background: var(--bg-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h2 {
    text-align: left;
    margin-bottom: 1.5rem;
}

.about-lead {
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.about-text p {
    margin-bottom: 1.5rem;
    color: var(--text-light);
    line-height: 1.8;
}

.about-features {
    list-style: none;
    margin-top: 2rem;
}

.about-features li {
    padding: 0.8rem 0;
    color: var(--text-dark);
    font-weight: 500;
}

.about-image-placeholder {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    font-size: 1.2rem;
    overflow: hidden;
    position: relative;
}

.about-image-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.3), rgba(59, 130, 246, 0.3));
    z-index: 1;
}

/* Portfolio Section */
.portfolio {
    padding: 100px 0;
    background: var(--bg-white);
}

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

.portfolio-item {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    aspect-ratio: 4/3;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.portfolio-item:hover,
.portfolio-item:focus {
    transform: scale(1.05);
    outline: 3px solid var(--accent-color);
    outline-offset: 4px;
}

.portfolio-item:focus {
    outline: 3px solid var(--primary-color);
}

.portfolio-image {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    transition: transform 0.5s ease;
}

.portfolio-item:hover .portfolio-image {
    transform: scale(1.1);
}

.portfolio-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    color: var(--bg-white);
    padding: 2rem;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.portfolio-item:hover .portfolio-overlay {
    transform: translateY(0);
}

.portfolio-overlay h3 {
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

.portfolio-overlay p {
    opacity: 0.9;
    font-size: 0.95rem;
}

/* Contact Section */
.contact {
    padding: 100px 0;
    background: var(--bg-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-top: 3rem;
}

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.contact-info > p {
    margin-bottom: 2rem;
    color: var(--text-light);
    line-height: 1.8;
}

.contact-item {
    margin-bottom: 1.5rem;
}

.contact-item strong {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.contact-item a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-item a:hover,
.contact-item a:focus {
    color: var(--accent-color);
    text-decoration: underline;
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
    border-radius: 2px;
}

.contact-item address {
    font-style: normal;
    line-height: 1.8;
}

.contact-form {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    border-color: var(--primary-color);
}

.submit-button {
    width: 100%;
    padding: 1.2rem;
    background: var(--primary-color);
    color: var(--bg-white);
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.submit-button:hover,
.submit-button:focus {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(30, 58, 138, 0.3);
    outline: 3px solid rgba(255, 255, 255, 0.5);
    outline-offset: 2px;
}

.submit-button:active {
    transform: translateY(0);
}

/* Impressum Section */
.impressum {
    padding: 100px 0;
    background: var(--bg-white);
}

.impressum-content {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-light);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.impressum-content p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

.impressum-content a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all 0.3s ease;
}

.impressum-content a:hover,
.impressum-content a:focus {
    color: var(--accent-color);
    text-decoration: underline;
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
    border-radius: 2px;
}

.footer a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer a:hover,
.footer a:focus {
    color: var(--bg-white);
    text-decoration: underline;
    outline: 2px solid rgba(255, 255, 255, 0.5);
    outline-offset: 2px;
}

.legal-text {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
}

.legal-text h3 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: var(--bg-white);
    text-align: center;
    padding: 2rem 0;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Visually Hidden Label */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Skip to Content Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: var(--bg-white);
    padding: 12px 20px;
    text-decoration: none;
    z-index: 10000;
    font-weight: 600;
    border-radius: 0 0 4px 0;
}

.skip-link:focus {
    top: 0;
    outline: 3px solid var(--accent-color);
    outline-offset: 2px;
}

/* Loading State */
.service-image,
.portfolio-image {
    background-color: #e5e7eb;
    background-size: cover;
    background-position: center;
    transition: opacity 0.3s ease;
}

.service-image.loading,
.portfolio-image.loading {
    opacity: 0.5;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--bg-white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .contact-content,
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

    .section-title {
        font-size: 2rem;
    }

    .hero-image {
        background-attachment: scroll;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .hamburger,
    .cta-button,
    .contact-form,
    .footer {
        display: none;
    }

    .hero {
        height: auto;
        min-height: auto;
        page-break-after: always;
    }
}