/* ========================================
   Global Styles & Reset
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #00a8e8;
    --secondary-color: #e63946;
    --dark-color: #2c3e50;
    --light-color: #ecf0f1;
    --text-color: #333;
    --gray-color: #7f8c8d;
    --white: #ffffff;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    overflow-x: hidden;
}

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

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo img {
    height: 80px;
    width: auto;
    transition: var(--transition);
}

.logo img:hover {
    transform: scale(1.05);
}

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

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

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

.nav-link:hover::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--dark-color);
    transition: var(--transition);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #00a8e8 0%, #0077b6 100%);
    color: var(--white);
    margin-top: 100px;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    animation: fadeInUp 1s ease;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-black {
    color: #000;
}

.highlight {
    color: var(--secondary-color);
    position: relative;
    display: inline-block;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    font-weight: 300;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 1rem 2.5rem;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
    display: inline-block;
}

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

.btn-primary:hover {
    background: #2980b9;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

.btn-secondary:hover {
    background: var(--white);
    color: var(--primary-color);
    transform: translateY(-3px);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-indicator span {
    display: block;
    width: 30px;
    height: 50px;
    border: 2px solid var(--white);
    border-radius: 25px;
    position: relative;
}

.scroll-indicator span::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background: var(--white);
    border-radius: 50%;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% {
        top: 10px;
        opacity: 1;
    }
    100% {
        top: 30px;
        opacity: 0;
    }
}

/* ========================================
   Section Styles
   ======================================== */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

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

.title-underline {
    width: 80px;
    height: 4px;
    background: var(--primary-color);
    margin: 0 auto 1rem;
}

.section-description {
    font-size: 1.1rem;
    color: var(--gray-color);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   About Section
   ======================================== */
.about {
    background: var(--white);
}

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

.about-text h3 {
    font-size: 2rem;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

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

.about-features {
    margin-top: 2rem;
}

.feature-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    align-items: flex-start;
}

.feature-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.feature-text h4 {
    color: var(--dark-color);
    margin-bottom: 0.3rem;
}

.feature-text p {
    color: var(--gray-color);
    margin: 0;
    font-size: 0.95rem;
}

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    display: block;
}

/* ========================================
   Services Section
   ======================================== */
.services {
    background: var(--light-color);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--white);
    padding: 2.5rem 2rem;
    border-radius: 10px;
    text-align: center;
    transition: var(--transition);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    color: var(--primary-color);
}

.service-icon svg {
    width: 100%;
    height: 100%;
}

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

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

/* ========================================
   Projects Section
   ======================================== */
.projects {
    background: var(--light-bg);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

/* Linked card */
.project-card--link {
    display: block;
    text-decoration: none;
    color: inherit;
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card--link:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.16);
}

/* Image area */
.project-image {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.main-img-wrap {
    position: relative;
    height: 220px;
    overflow: hidden;
    flex-shrink: 0;
}

.project-image--bitumen {
    background: linear-gradient(135deg, #1a1a1a 0%, #3d3d3d 50%, #555 100%);
}

.project-image--blech {
    background: linear-gradient(135deg, #5a6f7c 0%, #8fa8b5 50%, #b8cdd6 100%);
}

.project-image--poly {
    background: linear-gradient(135deg, #4a8fa8 0%, #7ab8cc 50%, #c2e4ef 100%);
}

/* Hover overlay */
.project-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.35s ease;
}

.project-card--link:hover .project-overlay {
    background: rgba(0, 0, 0, 0.45);
}

.project-cta {
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.project-card--link:hover .project-cta {
    opacity: 1;
    transform: translateY(0);
}

/* Badge */
.project-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: rgba(255, 255, 255, 0.18);
    backdrop-filter: blur(6px);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 0.3rem 0.8rem;
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

/* Main image */
.main-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity 0.4s ease;
}

/* Thumbnail strip */
.thumb-strip {
    display: flex;
    gap: 4px;
    padding: 6px 8px;
    background: #fff;
    border-top: 1px solid #eee;
}

.thumb {
    width: 54px;
    height: 40px;
    object-fit: cover;
    border-radius: 3px;
    cursor: pointer;
    border: 2px solid transparent;
    opacity: 0.55;
    transition: opacity 0.2s, border-color 0.2s;
    flex-shrink: 0;
}

.thumb:hover {
    opacity: 1;
}

.thumb.active {
    border-color: var(--primary-color);
    opacity: 1;
}

/* Content */
.project-content {
    padding: 1.5rem;
}

.project-content h3 {
    font-size: 1.3rem;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.project-content p {
    color: var(--gray-color);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.project-link-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary-color);
    transition: letter-spacing 0.2s ease;
}

.project-card--link:hover .project-link-label {
    letter-spacing: 0.04em;
}

/* ========================================
   Contact Section
   ======================================== */
.contact {
    background: var(--light-color);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info h3 {
    font-size: 2rem;
    color: var(--dark-color);
    margin-bottom: 2rem;
}

.info-item {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    align-items: flex-start;
}

.info-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.info-item h4 {
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.info-item p {
    color: var(--gray-color);
    line-height: 1.8;
}

.info-item a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.info-item a:hover {
    color: var(--secondary-color);
}

.contact-form-wrapper {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: 0.5rem;
    color: var(--dark-color);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    padding: 0.8rem 1rem;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-form .btn {
    margin-top: 1rem;
    width: 100%;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--dark-color);
    color: var(--light-color);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-logo {
    height: 80px;
    width: auto;
    margin-bottom: 1rem;
    background: white;
    padding: 10px;
    border-radius: 5px;
}

.footer-section h4 {
    color: var(--white);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.footer-section p {
    color: var(--light-color);
    line-height: 1.8;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: var(--light-color);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--light-color);
    text-decoration: none;
    transition: var(--transition);
}

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

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

.fade-in {
    animation: fadeInUp 0.8s ease;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
        gap: 0;
    }

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

    .nav-menu li {
        padding: 1rem 0;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

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

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

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

    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 600px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

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

    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
    }

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

    .contact-form-wrapper {
        padding: 1.5rem;
    }

    .logo img {
        height: 60px;
    }
}

@media (max-width: 400px) {
    .container {
        padding: 0 15px;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    section {
        padding: 60px 0;
    }
}

/* ===== Impressum ===== */
.impressum {
    background: var(--light-bg);
}

.impressum-content {
    max-width: 800px;
    margin: 0 auto;
}

.impressum-block {
    margin-bottom: 2.5rem;
}

.impressum-block h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.8rem;
    padding-bottom: 0.4rem;
    border-bottom: 1px solid #e0e0e0;
}

.impressum-table {
    width: 100%;
    border-collapse: collapse;
}

.impressum-table td {
    padding: 0.5rem 0;
    vertical-align: top;
    font-size: 0.95rem;
    color: var(--text-color);
    line-height: 1.6;
}

.impressum-table td:first-child {
    width: 220px;
    font-weight: 500;
    color: #555;
    padding-right: 1.5rem;
}

.impressum-table a,
.impressum-block a {
    color: var(--primary-color);
    text-decoration: none;
}

.impressum-table a:hover,
.impressum-block a:hover {
    text-decoration: underline;
}

.impressum-footer {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid #e0e0e0;
    font-size: 0.85rem;
    color: #888;
}

@media (max-width: 600px) {
    .impressum-table td:first-child {
        width: 140px;
    }
}

.dsgvo-ref {
    font-size: 0.75rem;
    font-weight: 400;
    color: #999;
    margin-left: 0.5rem;
}

.dsgvo-list {
    margin: 0.6rem 0 0.8rem 1.2rem;
    padding: 0;
}

.dsgvo-list li {
    font-size: 0.95rem;
    color: var(--text-color);
    line-height: 1.7;
}