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

body {
    min-height: 100vh;
    background-color: #FFFFFF;
    display: flex;
    flex-direction: column;
    font-family: 'Open Sans', sans-serif;
}

.site-main {
    flex: 1;
    padding-top: 100px;
}

@media (prefers-color-scheme: dark) {
    body {
        background-color: #292929;
        color: #fff;
    }
}

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

/* Site header */
.site-header {
    padding: 20px 0;
    background-color: #fff;
    border-bottom: 1px solid #eee;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

@media (prefers-color-scheme: dark) {
    .site-header {
        background-color: #333;
        border-bottom-color: #444;
    }
}

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

.header-logo {
    display: inline-block;
}

.header-logo img {
    height: 40pt;
    width: auto;
}

.navbar {
    display: flex;
    gap: 30px;
}

.navbar a {
    color: #333;
    text-decoration: none;
    font-weight: 500;
    padding: 8px 0;
}

.navbar a:hover {
    color: #256ECE;
}

@media (prefers-color-scheme: dark) {
    .navbar a {
        color: #fff;
    }

    .navbar a:hover {
        color: #5a9eff;
    }
}

@media (max-width: 600px) {
    .header-content {
        flex-direction: column;
        gap: 15px;
    }
}

/* Hero section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #fff;
    padding: 20px;
    margin-top: 30vh;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    text-transform: uppercase;
}

@media (max-width: 600px) {
    .hero {
        min-height: 60vh;
    }

    .hero-content h1 {
        font-size: 2rem;
    }
}

/* About section */
.about {
    padding: 80px 0;
}

.about h2 {
    color: #256ECE;
    font-size: 2rem;
    margin-bottom: 30px;
}

@media (prefers-color-scheme: dark) {
    .about h2 {
        color: #5a9eff;
    }
}

.about-content {
    font-size: 1.1rem;
    line-height: 1.8;
    max-width: 800px;
}

.about-content p {
    margin-bottom: 20px;
}

/* Projects section (frontpage) */
.projects-section {
    padding: 80px 0;
    background-color: #f5f5f5;
}

@media (prefers-color-scheme: dark) {
    .projects-section {
        background-color: #333;
    }
}

/* Employees section (frontpage) */
.employees-section {
    padding: 80px 0;
}

/* Section headings and links */
.projects-section h2,
.employees-section h2 {
    color: #256ECE;
    font-size: 2rem;
    margin-bottom: 40px;
}

@media (prefers-color-scheme: dark) {
    .projects-section h2,
    .employees-section h2 {
        color: #5a9eff;
    }
}

.section-link {
    text-align: center;
    margin-top: 40px;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: #256ECE;
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
    font-weight: 500;
}

.btn:hover {
    background-color: #1a5ab8;
}

/* Page header */
.page-header {
    padding: 40px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.page-header h1 {
    color: #256ECE;
    font-size: 2.5rem;
}

@media (prefers-color-scheme: dark) {
    .page-header h1 {
        color: #5a9eff;
    }
}

/* Card list */
.card-list {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.card {
    display: flex;
    background: #f5f5f5;
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 30px;
}

@media (prefers-color-scheme: dark) {
    .card {
        background: #3a3a3a;
    }
}

.card picture {
    flex-shrink: 0;
}

.card picture img,
.card > img {
    width: 300px;
    height: 300px;
    object-fit: cover;
    display: block;
    background: #ddd;
}

@media (prefers-color-scheme: dark) {
    .card img {
        background: #555;
    }
}

.card-content {
    padding: 30px 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.card h2 {
    margin: 0 0 8px 0;
    font-size: 1.8rem;
    color: #256ECE;
}

@media (prefers-color-scheme: dark) {
    .card h2 {
        color: #5a9eff;
    }
}

.card .subtitle {
    color: #777;
    font-size: 1.1rem;
    margin-bottom: 20px;
}

@media (prefers-color-scheme: dark) {
    .card .subtitle {
        color: #aaa;
    }
}

.card .contact {
    font-size: 1rem;
}

.card .contact p {
    margin-bottom: 8px;
}

.card .contact a {
    color: #256ECE;
    text-decoration: none;
}

.card .contact a:hover {
    text-decoration: underline;
}

@media (prefers-color-scheme: dark) {
    .card .contact a {
        color: #5a9eff;
    }
}

.card .details {
    font-size: 0.95rem;
    margin-bottom: 15px;
}

.card .details p {
    margin-bottom: 5px;
}

.card .description {
    font-size: 0.95rem;
    line-height: 1.6;
    color: #555;
}

.card .description p {
    margin: 15px 0;
}

@media (prefers-color-scheme: dark) {
    .card .description {
        color: #bbb;
    }
}

/* Mobile layout */
@media (max-width: 600px) {
    .card {
        flex-direction: column;
    }

    .card picture {
        width: 100%;
    }

    .card picture img,
    .card > img {
        width: 100%;
        height: 250px;
    }

    .card-content {
        padding: 20px;
    }
}

/* Site footer */
.site-footer {
    background-color: #256ECE;
    color: #fff;
    padding: 40px 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 40px;
}

.footer-logo-section {
    flex: 1;
}

.footer-info,
.footer-contact {
    flex: 1;
    line-height: 1.8;
}

.footer-heading {
    font-weight: bold;
    margin-bottom: 10px;
    text-transform: uppercase;
}

.site-footer a {
    color: #fff;
    text-decoration: none;
}

.footer-logo {
    height: 50px;
    width: auto;
    margin-bottom: 15px;
    filter: brightness(0) invert(1);
}

.site-footer a:hover {
    text-decoration: underline;
}

@media (max-width: 600px) {
    .footer-content {
        flex-direction: column;
        gap: 30px;
    }

    .footer-logo-section {
        text-align: center;
    }
}

/* Contact section (frontpage) */
.contact-section {
    padding: 80px 0;
    background-color: #f5f5f5;
}

@media (prefers-color-scheme: dark) {
    .contact-section {
        background-color: #333;
    }
}

/* Contact page */
.contact-page {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px 60px;
}

.contact-info h2,
.contact-form-section h2 {
    color: #256ECE;
    margin-bottom: 20px;
}

@media (prefers-color-scheme: dark) {
    .contact-info h2,
    .contact-form-section h2 {
        color: #5a9eff;
    }
}

.contact-details {
    line-height: 2;
}

.contact-details a {
    color: #256ECE;
    text-decoration: none;
}

.contact-details a:hover {
    text-decoration: underline;
}

@media (prefers-color-scheme: dark) {
    .contact-details a {
        color: #5a9eff;
    }
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: 'Open Sans', sans-serif;
    font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #256ECE;
}

@media (prefers-color-scheme: dark) {
    .form-group input,
    .form-group textarea {
        background-color: #3a3a3a;
        border-color: #555;
        color: #fff;
    }

    .form-group input:focus,
    .form-group textarea:focus {
        border-color: #5a9eff;
    }
}

.btn-submit {
    padding: 12px 30px;
    background-color: #256ECE;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-family: 'Open Sans', sans-serif;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    align-self: flex-start;
}

.btn-submit:hover {
    background-color: #1a5ab8;
}

@media (max-width: 768px) {
    .contact-page {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

/* Error page */
.error-page {
    text-align: center;
    padding: 80px 20px;
}

.error-icon {
    font-size: 8rem;
    margin-bottom: 20px;
    animation: dig 2s ease-in-out infinite;
}

@keyframes dig {
    0%, 100% { transform: rotate(-5deg); }
    50% { transform: rotate(5deg); }
}

.error-page h1 {
    font-size: 2.5rem;
    color: #256ECE;
    margin-bottom: 20px;
}

@media (prefers-color-scheme: dark) {
    .error-page h1 {
        color: #5a9eff;
    }
}

.error-page p {
    font-size: 1.3rem;
    margin-bottom: 15px;
}

.error-page .error-subtitle {
    color: #777;
    font-size: 1.1rem;
    margin-bottom: 40px;
}

@media (prefers-color-scheme: dark) {
    .error-page .error-subtitle {
        color: #aaa;
    }
}

@media (max-width: 600px) {
    .error-icon {
        font-size: 5rem;
    }

    .error-page h1 {
        font-size: 1.8rem;
    }

    .error-page p {
        font-size: 1.1rem;
    }
}