/* Variabelen */
:root {
    --primary-color: #002244;
    --secondary-color: #a3c4dc;
    --text-color: #333;
    --background-color: #f8f8f8;
    --white: #ffffff;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* Reset en basis styling */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

a {
    text-decoration: none;
    color: var(--primary-color);
}

h1, h2, h3 {
    margin-bottom: 0.5rem;
    line-height: 1.2;
    color: var(--primary-color);
}

/* Header styling */
.site-header {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    border-bottom: 3px solid var(--secondary-color);
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.logo a {
    display: inline-flex;
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    border: 2px solid var(--secondary-color);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
    padding: 3px;
    background-color: white;
}

.logo a:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 12px rgba(0, 0, 0, 0.3);
}

.logo img {
    height: 65px;
    width: auto;
    object-fit: contain;
    vertical-align: middle;
    border-radius: 6px;
}

.logo-text {
    margin-left: 20px;
}

.logo-text h1 {
    font-size: 2rem;
    color: var(--white);
    margin: 0;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.logo-text h1 span {
    display: block;
    font-size: 1.1rem;
    font-weight: normal;
    color: var(--secondary-color);
    letter-spacing: 1px;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    color: var(--white);
    font-weight: 600;
    padding: 8px 0;
    position: relative;
    transition: var(--transition);
    display: flex;
    align-items: center;
}

nav ul li a i {
    margin-right: 8px;
    font-size: 1.1rem;
    color: var(--secondary-color);
}

nav ul li a:hover {
    color: var(--secondary-color);
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--secondary-color);
    transition: var(--transition);
}

nav ul li a:hover::after {
    width: 100%;
}

/* Actieve navigatie item */
nav ul li a.active {
    color: var(--secondary-color);
}

nav ul li a.active::after {
    width: 100%;
}

/* Responsieve header */
@media (max-width: 768px) {
    .site-header .container {
        flex-direction: column;
        text-align: center;
    }

    .logo {
        margin-bottom: 15px;
        justify-content: center;
    }
    
    .logo-text h1 {
        font-size: 1.6rem;
    }
    
    .logo-text h1 span {
        font-size: 0.9rem;
    }

    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }

    nav ul li {
        margin: 5px 10px;
    }
    
    nav ul li a {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .logo a {
        height: 60px;
    }
    
    .logo img {
        height: 60px;
    }
    
    .logo-text h1 {
        font-size: 1.4rem;
    }
    
    .nav ul li a i {
        margin-right: 5px;
    }
}

/* Portfolio pagina styling */
.page-hero {
    position: relative;
    height: auto;
    padding: 2rem 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    display: flex;
    align-items: center;
    text-align: center;
    color: var(--white);
    margin-top: -15px;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.6));
    z-index: 1;
}

.page-hero .container {
    position: relative;
    z-index: 2;
    max-width: 900px;
    margin: 0 auto;
    padding: 1.5rem;
    background: rgba(0, 34, 68, 0.7);
    border-radius: 10px;
    -webkit-backdrop-filter: blur(5px);
    backdrop-filter: blur(5px);
}

.page-hero h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--white);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.page-hero p {
    font-size: 1.1rem;
    margin-bottom: 0;
    color: var(--secondary-color);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
    font-weight: 400;
}

.page-hero i {
    color: var(--secondary-color);
    margin-right: 15px;
}

.page-hero::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 0;
    width: 100%;
    height: 40px;
    background: var(--white);
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 0);
}

/* Portfolio section styling */
.portfolio-section {
    padding: 80px 0 40px;
    background: var(--white);
}

.section-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 40px;
}

.section-intro h2 {
    color: var(--primary-color);
    font-size: 2.2rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 15px;
}

.section-intro h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: var(--secondary-color);
}

.section-intro p {
    color: var(--text-color);
    font-size: 1.1rem;
    line-height: 1.6;
}

/* Portfolio filter */
.portfolio-filter {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.filter-btn {
    background: none;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    padding: 8px 20px;
    margin: 0 8px 10px;
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.filter-btn:hover, 
.filter-btn.active {
    background: var(--primary-color);
    color: var(--white);
}

/* Portfolio grid styling */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.portfolio-item {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

.portfolio-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.portfolio-content {
    position: relative;
    overflow: hidden;
    height: 300px;
}

.portfolio-content img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 34, 68, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.overlay-content {
    text-align: center;
    color: var(--white);
    padding: 20px;
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

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

.overlay-content h3 {
    color: var(--white);
    font-size: 1.3rem;
    margin-bottom: 5px;
}

.overlay-content p {
    color: var(--secondary-color);
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.view-project {
    display: inline-block;
    width: 45px;
    height: 45px;
    line-height: 45px;
    background: var(--secondary-color);
    color: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}

.view-project:hover {
    background: var(--white);
    transform: scale(1.1);
}

.view-project i {
    font-size: 1.2rem;
}

/* Enhanced Lightbox styling */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.lightbox.show {
    opacity: 1;
    visibility: visible;
}

.lightbox-content {
    position: relative;
    max-width: 90%;
    max-height: 80vh;
    margin: 20px;
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.3);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.lightbox.show .lightbox-content {
    transform: scale(1);
}

.lightbox-content img {
    display: block;
    max-width: 100%;
    max-height: 70vh;
    object-fit: contain;
}

.lightbox-caption {
    padding: 15px 20px;
    background: var(--white);
    text-align: center;
}

.lightbox-caption h3 {
    color: var(--primary-color);
    margin-bottom: 5px;
    font-size: 1.2rem;
}

.lightbox-caption p {
    color: var(--text-color);
    font-size: 0.9rem;
}

.close-lightbox {
    position: absolute;
    top: 15px;
    right: 15px;
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    z-index: 2100;
    transition: all 0.3s ease;
}

.close-lightbox:hover {
    background: var(--secondary-color);
    transform: rotate(90deg);
}

.close-lightbox i {
    font-size: 1.2rem;
}

/* Responsive styling for portfolio page */
@media (max-width: 992px) {
    .portfolio-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 20px;
    }
    
    .portfolio-content {
        height: 250px;
    }
}

@media (max-width: 768px) {
    .page-hero .container {
        margin: 0 15px;
        padding: 1rem;
    }

    .page-hero h1 {
        font-size: 1.8rem;
    }
    
    .page-hero p {
        font-size: 1rem;
    }

    .portfolio-filter {
        flex-direction: column;
        align-items: center;
    }
    
    .filter-btn {
        margin-bottom: 10px;
        width: 200px;
    }
    
    .portfolio-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 15px;
    }
    
    .portfolio-content {
        height: 200px;
    }
    
    .overlay-content h3 {
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .portfolio-content {
        height: 250px;
    }
}

/* Footer styling */
.site-footer {
    background-color: var(--primary-color);
    color: white;
    margin-top: 50px;
    border-top: 5px solid var(--secondary-color);
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    padding: 40px 0;
}

.footer-section {
    flex: 1;
    min-width: 250px;
    margin-bottom: 20px;
    padding: 0 20px;
}

.footer-section h3 {
    color: white;
    margin-bottom: 20px;
    font-size: 1.2rem;
    position: relative;
    padding-bottom: 10px;
}

.footer-section h3::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 50px;
    height: 2px;
    background-color: var(--secondary-color);
}

.footer-section p {
    margin-bottom: 10px;
    color: rgba(255, 255, 255, 0.7);
    display: flex;
    align-items: center;
}

.footer-section i {
    margin-right: 10px;
    color: var(--secondary-color);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: white;
}

.social-icons {
    display: flex;
    gap: 15px;
    margin-top: 15px;
}

.social-icons a {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.social-icons a:hover {
    background-color: var(--secondary-color);
    transform: translateY(-5px);
}

.social-icons i {
    font-size: 20px;
    color: white;
    margin: 0;
}

.footer-map iframe {
    width: 100%;
    height: 200px;
    border-radius: 5px;
    border: none;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.footer-bottom {
    background-color: rgba(0, 0, 0, 0.2);
    padding: 15px 0;
    text-align: center;
}

.footer-bottom p {
    margin: 0;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
}

@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
    }
    
    .footer-section {
        margin-bottom: 30px;
    }
}

/* Home page styling */
/* Hero sectie */
.hero {
    position: relative;
    height: auto;
    padding: 2rem 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    display: flex;
    align-items: center;
    text-align: center;
    color: var(--white);
    margin-top: -15px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.6));
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    margin: 0 auto;
    padding: 1.5rem;
    background: rgba(0, 34, 68, 0.7);
    border-radius: 10px;
    -webkit-backdrop-filter: blur(5px);
    backdrop-filter: blur(5px);
}

.hero h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--white);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero p {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 1rem;
}

.hero-buttons .btn {
    padding: 12px 25px;
    font-size: 1rem;
    border-radius: 50px;
    transition: var(--transition);
    text-shadow: none;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

@media (max-width: 768px) {
    .hero .container {
        margin: 0 15px;
        padding: 1rem;
    }

    .hero h1 {
        font-size: 1.8rem;
    }
    
    .hero p {
        font-size: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }

    .hero-buttons .btn {
        width: 100%;
        max-width: 250px;
        padding: 10px 20px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.3rem;
    }

    .hero-buttons .btn {
        padding: 12px 25px;
        font-size: 1rem;
    }
}

/* Diensten sectie */
.services {
    padding: 80px 0;
    background: var(--white);
}

.services h2, 
.testimonials h2, 
.usp-section h2,
.cta-section h2 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2.2rem;
    color: var(--primary-color);
    position: relative;
    padding-bottom: 15px;
}

.services h2::after, 
.testimonials h2::after, 
.usp-section h2::after,
.cta-section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: var(--secondary-color);
}

.services h2 i, 
.testimonials h2 i, 
.usp-section h2 i {
    color: var(--secondary-color);
    margin-right: 10px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.service-item {
    background: var(--background-color);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: var(--shadow);
}

.service-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.service-item i {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.service-item h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.service-item p {
    color: var(--text-color);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* USP sectie */
.usp-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, #001122 100%);
    color: var(--white);
    position: relative;
}

.usp-section h2 {
    color: var(--white);
}

.usp-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.usp-item {
    text-align: center;
    padding: 30px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    -webkit-backdrop-filter: blur(5px);
    backdrop-filter: blur(5px);
    transition: transform 0.3s ease;
}

.usp-item:hover {
    transform: translateY(-5px);
}

.usp-item i {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.usp-item h3 {
    color: var(--white);
    margin-bottom: 10px;
    font-size: 1.3rem;
}

.usp-item p {
    color: rgba(255, 255, 255, 0.8);
}

/* Testimonials sectie */
.testimonials {
    padding: 80px 0;
    background: var(--background-color);
}

.testimonial-slider {
    max-width: 800px;
    margin: 0 auto;
}

.testimonial {
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    position: relative;
}

.testimonial::before {
    content: '\201C';
    font-size: 5rem;
    color: var(--secondary-color);
    position: absolute;
    top: 10px;
    left: 20px;
    font-family: Georgia, serif;
    opacity: 0.3;
}

.testimonial p {
    font-style: italic;
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 20px;
    color: var(--text-color);
}

.testimonial cite {
    display: block;
    font-weight: 600;
    color: var(--primary-color);
    font-style: normal;
}

/* CTA sectie */
.cta-section {
    padding: 80px 0;
    background: var(--white);
    text-align: center;
}

.cta-section p {
    max-width: 600px;
    margin: 0 auto 30px;
    font-size: 1.1rem;
    color: var(--text-color);
}

/* Responsive styling voor homepage */
@media (max-width: 768px) {
    .services-grid, 
    .usp-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .services h2, 
    .testimonials h2, 
    .usp-section h2,
    .cta-section h2 {
        font-size: 1.8rem;
    }
}

@media (max-width: 480px) {
    .testimonial {
        padding: 30px 20px;
    }
}

/* Contact pagina styling */
.contact-section {
    padding: 80px 0 40px;
    background: var(--white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 40px;
}

.contact-form-container {
    background: var(--background-color);
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.contact-form {
    display: grid;
    gap: 20px;
}

.form-group {
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.95rem;
}

.form-group .required {
    color: #e74c3c;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #eaeaea;
    border-radius: 8px;
    background: var(--white);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--secondary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(163, 196, 220, 0.2);
}

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

.form-group button {
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

/* Contact information styling */
.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.info-card {
    background: var(--background-color);
    padding: 25px 20px;
    text-align: center;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.info-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.icon-wrapper {
    width: 70px;
    height: 70px;
    background: var(--primary-color);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    margin: 0 auto 15px;
}

.icon-wrapper i {
    font-size: 1.8rem;
    color: var(--secondary-color);
}

.info-card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.info-card p {
    margin-bottom: 5px;
    color: var(--text-color);
    font-size: 0.95rem;
}

.info-card a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

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

/* Map styling */
.map-section {
    padding: 40px 0;
    background: var(--background-color);
}

.map-container {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    margin-top: 30px;
}

.map-container iframe {
    display: block;
    border: none;
}

/* Responsive styling for contact page */
@media (max-width: 992px) {
    .contact-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .contact-info {
        grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    }
}

@media (max-width: 768px) {
    .contact-form-container {
        padding: 30px 20px;
    }
    
    .contact-info {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .icon-wrapper {
        width: 60px;
        height: 60px;
    }
    
    .icon-wrapper i {
        font-size: 1.5rem;
    }
    
    .map-container iframe {
        height: 350px;
    }
}

@media (max-width: 480px) {
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 10px;
        font-size: 0.9rem;
    }
    
    .map-container iframe {
        height: 300px;
    }
}

/* Offerte Calculator sectie */
.calculator-section {
    padding: 80px 0;
    background-color: var(--white);
}

.section-intro-text {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 40px;
    font-size: 1.1rem;
    color: var(--text-color);
}

.calculator-container {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
    background: var(--background-color);
    border-radius: 10px;
    box-shadow: var(--shadow);
    padding: 30px;
}

.calculator-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.calculator-options {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 25px;
}

.option-group {
    display: flex;
    align-items: center;
    margin-right: 20px;
}

.option-group input[type="checkbox"] {
    margin-right: 8px;
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
}

.option-group label {
    font-size: 0.95rem;
    color: var(--text-color);
}

.calculator-form button {
    margin-top: 10px;
    width: 100%;
}

.price-result {
    background: var(--primary-color);
    color: var(--white);
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    height: fit-content;
    align-self: center;
}

.price-result h3 {
    color: var(--white);
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.price-result .note {
    color: var(--secondary-color);
    font-size: 0.9rem;
    margin-bottom: 20px;
    font-style: italic;
}

.price-display {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 25px 0;
    color: var(--secondary-color);
}

.price-result .btn {
    margin-top: 15px;
    background: var(--secondary-color);
    color: var(--primary-color);
    border: 2px solid var(--secondary-color);
}

.price-result .btn:hover {
    background: transparent;
    color: var(--secondary-color);
}

@media (max-width: 992px) {
    .calculator-container {
        grid-template-columns: 1fr;
    }
    
    .price-result {
        margin-top: 20px;
    }
}

@media (max-width: 768px) {
    .calculator-grid {
        grid-template-columns: 1fr;
    }
    
    .calculator-options {
        flex-direction: column;
        gap: 15px;
    }
    
    .price-display {
        font-size: 2rem;
    }
}

/* FAQ Sectie */
.faq-section {
    padding: 80px 0;
    background-color: var(--background-color);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 20px;
    margin-top: 40px;
}

.faq-item {
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
}

.faq-item:hover {
    transform: translateY(-5px);
}

.faq-question {
    padding: 20px 25px;
    background: var(--white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(0, 34, 68, 0.1);
    transition: background-color 0.3s ease;
}

.faq-question:hover {
    background-color: rgba(163, 196, 220, 0.1);
}

.faq-question h3 {
    margin: 0;
    font-size: 1.1rem;
    color: var(--primary-color);
    padding-right: 30px;
}

.toggle-icon {
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.faq-item.active .toggle-icon {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 20px 25px;
    max-height: 500px;
}

.faq-answer p {
    margin: 0;
    color: var(--text-color);
    line-height: 1.6;
    font-size: 0.95rem;
}

@media (max-width: 768px) {
    .faq-grid {
        grid-template-columns: 1fr;
    }
    
    .faq-question h3 {
        font-size: 1rem;
    }
}

/* Materiaal Types sectie */
.materials-section {
    padding: 80px 0;
    background-color: var(--white);
}

.materials-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-top: 40px;
}

.material-item {
    display: flex;
    background: var(--background-color);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.material-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.material-image {
    flex: 0 0 40%;
    position: relative;
    overflow: hidden;
}

.material-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease;
}

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

.material-info {
    flex: 0 0 60%;
    padding: 25px;
}

.material-info h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 1.3rem;
}

.material-info p {
    margin-bottom: 15px;
    color: var(--text-color);
    font-size: 0.95rem;
    line-height: 1.6;
}

.material-features {
    list-style: none;
    padding: 0;
}

.material-features li {
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    color: var(--text-color);
    font-size: 0.9rem;
}

.material-features li i {
    color: #4CAF50;
    margin-right: 10px;
    font-size: 1rem;
}

@media (max-width: 992px) {
    .materials-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .material-item {
        flex-direction: column;
    }
    
    .material-image {
        height: 200px;
    }
    
    .material-info {
        padding: 20px;
    }
}

/* Alert styling */
.alert {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 4px;
    font-size: 0.9rem;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert ul {
    margin: 0;
    padding-left: 20px;
}

.alert li {
    margin-bottom: 5px;
}

.alert li:last-child {
    margin-bottom: 0;
}