/* Kleurenpalet gedefinieerd als CSS variabelen */
:root {
    --color-dark-grey: #0c111a; 
    --color-greyish-blue: #1e2d45; /* Grijsblauw voor secundaire teksten of componenten */
    --color-light-grey: #C7CDD3; /* Lichtgrijs voor achtergronden of kaarten */
    --color-off-white: hsl(222, 28%, 91%); /* Off-white voor primaire tekst */
    --color-deep-blue: #010418; /* Diepblauw voor koppen of belangrijke elementen */
    --color-accent: #4b6fff; /* Accent color for buttons and highlights */
    --color-accent-hover: #3a56c7; /* Darker accent for hover states */
    --transition-speed: 0.3s; /* Standard transition speed */
    --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2); /* Standard shadow */
}

body, html {
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: 'Open Sans', sans-serif;
    scroll-behavior: smooth;
}

/* Preloader */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-deep-blue);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.8s ease-in-out, visibility 0.8s ease-in-out;
}

body.loaded #preloader {
    opacity: 0;
    visibility: hidden;
}

.loader {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(45deg, transparent, transparent 40%, var(--color-accent));
    animation: loader 1s linear infinite;
    position: relative;
}

.loader-inner {
    position: absolute;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--color-deep-blue);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

@keyframes loader {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* Pas globale stijlen toe */
body {
    background-color: var(--color-dark-grey);
    color: var(--color-off-white);
    line-height: 1.6;
}

/* Navbar stijlen */
.navbar {
    background-color: rgba(12, 17, 26, 0.7);
    backdrop-filter: blur(8px);
    padding: 1.2rem 0;
    transition: all 0.4s ease;
    z-index: 1000;
}

.navbar.scrolled {
    padding: 0.75rem 0;
    background-color: rgba(12, 17, 26, 0.95);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

/* Logo styling */
.logo-img {
    height: 36px;
    width: auto;
    margin-right: 12px;
    vertical-align: middle;
    object-fit: contain;
    transition: transform 0.3s ease;
}

.navbar-brand {
    display: flex;
    align-items: center;
    padding: 0;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-off-white);
    letter-spacing: -0.5px;
}

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

.navbar-dark .navbar-nav .nav-link {
    color: var(--color-light-grey);
    font-weight: 500;
    padding: 0.6rem 1.2rem;
    transition: all var(--transition-speed);
    position: relative;
}

.navbar-dark .navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 50%;
    background-color: var(--color-accent);
    transition: all var(--transition-speed);
    transform: translateX(-50%);
}

.navbar-dark .navbar-nav .nav-link:hover::after,
.navbar-dark .navbar-nav .active > .nav-link::after {
    width: 60%;
}

.navbar-dark .navbar-nav .nav-link:hover,
.navbar-dark .navbar-nav .active > .nav-link {
    color: white;
}

/* Hero section styles */
.hero-section {
    height: 100vh;
    position: relative;
    color: var(--color-off-white);
    display: flex;
    align-items: center;
    background-color: #000; /* Black background to blend with the image */
    background-image: url('../img/logo.png');
    background-size: 150% auto; /* Zoomed out background */
    background-position: center;
    background-repeat: no-repeat;
    padding-top: 60px;
    overflow: hidden;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom right, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.4));
    z-index: 1;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 1;
    z-index: 0;
}

.hero-text {
    position: relative;
    z-index: 2;
    text-align: left;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.9);
}

.hero-text h1 {
    font-weight: 700;
    margin-bottom: 1.8rem;
    font-size: 3.5rem;
    letter-spacing: -0.5px;
    color: #ffffff;
    line-height: 1.2;
}

.hero-text .lead {
    font-size: 1.4rem;
    margin-bottom: 2.5rem;
    font-weight: 300;
    max-width: 650px;
    color: rgba(255, 255, 255, 0.95);
}

.typed-text {
    font-weight: 600;
    color: var(--color-accent);
}

.typed-cursor {
    font-size: 1.5rem;
    color: var(--color-accent);
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.btn-outline-light {
    border-width: 2px;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    transition: all 0.4s ease;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.btn-outline-light:hover {
    background-color: white;
    color: var(--color-deep-blue);
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(255, 255, 255, 0.2);
}

.btn-primary {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    padding: 0.8rem 2rem;
    border-radius: 50px;
    transition: all 0.4s ease;
    font-weight: 600;
    letter-spacing: 0.5px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.4);
}

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

.btn-primary:active {
    transform: translateY(-1px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.4);
}

/* Animated elements */
.animated {
    animation-duration: 1.2s;
    animation-fill-mode: both;
}

.fadeIn {
    animation-name: fadeIn;
}

.delay-1s {
    animation-delay: 0.5s;
}

.delay-2s {
    animation-delay: 1s;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Portfolio section */
#portfolio {
    background-color: var(--color-dark-grey);
    padding: 8rem 0;
    position: relative;
}

#portfolio::before {
    content: '';
    position: absolute;
    top: -80px;
    left: 0;
    width: 100%;
    height: 80px;
    background: linear-gradient(to top, var(--color-dark-grey), transparent);
    z-index: 5;
}

#portfolio h2 {
    color: var(--color-off-white);
    font-weight: 800;
    position: relative;
    padding-bottom: 15px;
    margin-bottom: 1.5rem;
    font-size: 2.5rem;
}

#portfolio h2:after {
    content: '';
    position: absolute;
    display: block;
    width: 50px;
    height: 3px;
    background-color: var(--color-accent);
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

#portfolio p.text-center {
    color: var(--color-light-grey);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

/* Skills section styles */
#skills {
    background-color: var(--color-greyish-blue);
    padding: 8rem 0;
    position: relative;
}

#skills::before {
    content: '';
    position: absolute;
    top: -80px;
    left: 0;
    width: 100%;
    height: 80px;
    background: linear-gradient(to top, var(--color-greyish-blue), transparent);
    z-index: 5;
}

#skills h2 {
    color: var(--color-off-white);
    font-weight: 800;
    position: relative;
    padding-bottom: 15px;
    margin-bottom: 1.5rem;
    font-size: 2.5rem;
}

#skills h2:after {
    content: '';
    position: absolute;
    display: block;
    width: 50px;
    height: 3px;
    background-color: var(--color-accent);
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

#skills p.text-center {
    color: var(--color-light-grey);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

.skill-item {
    margin-bottom: 30px;
}

.skill-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
}

.skill-info h5 {
    color: var(--color-off-white);
    font-weight: 600;
    margin: 0;
    font-size: 1rem;
}

.skill-info p {
    color: var(--color-accent);
    font-weight: 700;
    margin: 0;
}

.progress {
    height: 8px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    overflow: hidden;
}

.progress-bar {
    background-color: var(--color-accent);
    transition: width 1.5s ease;
}

/* Testimonial section styles */
#testimonials {
    background-color: var(--color-dark-grey);
    padding: 8rem 0;
    position: relative;
}

#testimonials::before {
    content: '';
    position: absolute;
    top: -80px;
    left: 0;
    width: 100%;
    height: 80px;
    background: linear-gradient(to top, var(--color-dark-grey), transparent);
    z-index: 5;
}

#testimonials h2 {
    color: var(--color-off-white);
    font-weight: 800;
    position: relative;
    padding-bottom: 15px;
    margin-bottom: 1.5rem;
    font-size: 2.5rem;
}

#testimonials h2:after {
    content: '';
    position: absolute;
    display: block;
    width: 50px;
    height: 3px;
    background-color: var(--color-accent);
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

#testimonials p.text-center {
    color: var(--color-light-grey);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

.testimonial-item {
    background-color: var(--color-greyish-blue);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.testimonial-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
}

.testimonial-content {
    padding: 25px;
    flex-grow: 1;
    position: relative;
}

.testimonial-content::before {
    content: '\201C';
    font-family: serif;
    position: absolute;
    top: -20px;
    left: 20px;
    font-size: 5rem;
    color: rgba(255, 255, 255, 0.1);
    line-height: 1;
}

.testimonial-content p {
    color: var(--color-light-grey);
    font-style: italic;
    line-height: 1.8;
    position: relative;
    z-index: 1;
}

.testimonial-meta {
    display: flex;
    align-items: center;
    padding: 15px 25px;
    background-color: rgba(0, 0, 0, 0.1);
}

.testimonial-img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    overflow: hidden;
    margin-right: 15px;
    border: 2px solid var(--color-accent);
}

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

.testimonial-info h5 {
    margin: 0;
    font-weight: 600;
    color: var(--color-off-white);
    font-size: 1rem;
}

.testimonial-info p {
    margin: 0;
    color: var(--color-accent);
    font-size: 0.85rem;
    opacity: 0.8;
}

/* Portfolio filters */
.portfolio-filters {
    margin-bottom: 40px;
}

.btn-filter {
    background-color: transparent;
    border: 1px solid var(--color-greyish-blue);
    color: var(--color-light-grey);
    margin: 0 5px;
    padding: 10px 25px;
    border-radius: 30px;
    font-size: 0.9rem;
    transition: all var(--transition-speed);
    font-weight: 500;
}

.btn-filter:hover, .btn-filter.active {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: white;
    box-shadow: 0 5px 15px rgba(75, 111, 255, 0.3);
}

/* Portfolio items */
.portfolio-container {
    position: relative;
}

.portfolio-item {
    margin-bottom: 30px;
    transition: all 0.5s ease;
}

.portfolio-item.hidden {
    display: none;
}

/* Card customization */
.portfolio-card {
    background-color: var(--color-greyish-blue);
    border-radius: 12px;
    border: none;
    overflow: hidden;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    height: 100%;
    position: relative;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.portfolio-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--box-shadow);
}

.card-img-container {
    overflow: hidden;
    position: relative;
    max-height: 200px;
}

.card-img-top {
    transition: transform 0.5s ease;
    height: 200px;
    object-fit: cover;
    width: 100%;
}

.portfolio-card:hover .card-img-top {
    transform: scale(1.1);
}

/* Card overlay effect */
.card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.7) 100%);
    opacity: 0;
    transition: opacity var(--transition-speed);
    display: flex;
    align-items: flex-end;
    padding: 15px;
}

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

.card-overlay-content {
    width: 100%;
}

.project-category {
    display: inline-block;
    background-color: var(--color-accent);
    color: white;
    padding: 5px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.card-body {
    padding: 1.8rem;
}

.card-title {
    font-weight: 700;
    margin-bottom: 0.75rem;
    font-size: 1.3rem;
}

.card-text {
    font-size: 0.95rem;
    margin-bottom: 1.2rem;
    color: var(--color-light-grey);
    line-height: 1.6;
}

/* Tags */
.card-tags {
    margin-bottom: 1.2rem;
}

.tag {
    display: inline-block;
    background-color: rgba(255,255,255,0.1);
    color: var(--color-light-grey);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    margin-right: 6px;
    margin-bottom: 6px;
    transition: all 0.3s ease;
}

.tag:hover {
    background-color: rgba(255,255,255,0.2);
}

.card .btn {
    margin-top: auto;
    width: 100%;
}

/* Videos section */
#videos {
    background-color: var(--color-greyish-blue);
    padding: 8rem 0;
    position: relative;
}

#videos::before {
    content: '';
    position: absolute;
    top: -80px;
    left: 0;
    width: 100%;
    height: 80px;
    background: linear-gradient(to top, var(--color-greyish-blue), transparent);
    z-index: 5;
}

#videos h2 {
    color: var(--color-off-white);
    font-weight: 800;
    position: relative;
    padding-bottom: 15px;
    margin-bottom: 1.5rem;
    font-size: 2.5rem;
}

#videos h2:after {
    content: '';
    position: absolute;
    display: block;
    width: 50px;
    height: 3px;
    background-color: var(--color-accent);
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

#videos p.text-center {
    color: var(--color-light-grey);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

.video-card {
    background-color: var(--color-dark-grey);
    border-radius: 12px;
    overflow: hidden;
    height: 100%;
    box-shadow: var(--box-shadow);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.video-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
    height: 0;
    overflow: hidden;
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.video-info {
    padding: 1.5rem;
}

.video-info h5 {
    color: var(--color-off-white);
    font-weight: 700;
    margin-bottom: 0.75rem;
    font-size: 1.2rem;
}

.video-info p {
    color: var(--color-light-grey);
    margin-bottom: 1.2rem;
    font-size: 0.95rem;
}

.video-info .btn {
    display: block;
    width: 100%;
}

.video-info .btn i {
    margin-left: 5px;
}

/* About section */
#about {
    background-color: var(--color-greyish-blue);
    padding: 8rem 0;
    position: relative;
}

#about::before {
    content: '';
    position: absolute;
    top: -80px;
    left: 0;
    width: 100%;
    height: 80px;
    background: linear-gradient(to top, var(--color-greyish-blue), transparent);
    z-index: 5;
}

#about h2 {
    color: var(--color-off-white);
    font-weight: 800;
    position: relative;
    padding-bottom: 15px;
    margin-bottom: 3rem;
    font-size: 2.5rem;
}

#about h2:after {
    content: '';
    position: absolute;
    display: block;
    width: 50px;
    height: 3px;
    background-color: var(--color-accent);
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

#about .text-justify {
    color: var(--color-light-grey);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

/* Contact Section */
#contact {
    background-color: var(--color-dark-grey);
    padding: 8rem 0;
    position: relative;
}

#contact::before {
    content: '';
    position: absolute;
    top: -80px;
    left: 0;
    width: 100%;
    height: 80px;
    background: linear-gradient(to top, var(--color-dark-grey), transparent);
    z-index: 5;
}

#contact h2 {
    color: var(--color-off-white);
    font-weight: 800;
    position: relative;
    padding-bottom: 15px;
    margin-bottom: 3rem;
    font-size: 2.5rem;
}

#contact h2:after {
    content: '';
    position: absolute;
    display: block;
    width: 50px;
    height: 3px;
    background-color: var(--color-accent);
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

.contact-form {
    background-color: var(--color-greyish-blue);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--box-shadow);
}

.form-control {
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--color-off-white);
    border-radius: 6px;
    padding: 1rem;
    margin-bottom: 1.5rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    background-color: rgba(255, 255, 255, 0.15);
    border-color: var(--color-accent);
    color: var(--color-off-white);
    box-shadow: 0 0 0 0.2rem rgba(75, 111, 255, 0.25);
}

.form-control::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

/* Form validation styles */
.form-control.is-invalid {
    border-color: #dc3545;
    background-color: rgba(220, 53, 69, 0.1);
}

.form-control.is-valid {
    border-color: #28a745;
    background-color: rgba(40, 167, 69, 0.1);
}

.invalid-feedback {
    color: #dc3545;
    font-size: 0.85rem;
    margin-top: -1rem;
    margin-bottom: 1rem;
}

.alert-success {
    background-color: rgba(40, 167, 69, 0.2);
    border-color: rgba(40, 167, 69, 0.3);
    color: #d4edda;
}

.social-links {
    margin-top: 3rem;
}

.social-icon {
    display: inline-block;
    width: 45px;
    height: 45px;
    line-height: 45px;
    text-align: center;
    background-color: var(--color-greyish-blue);
    color: var(--color-off-white);
    border-radius: 50%;
    margin: 0 12px;
    transition: all var(--transition-speed);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
    font-size: 1.2rem;
}

.social-icon:hover {
    background-color: var(--color-accent);
    color: white;
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.3);
}

/* Footer */
footer {
    background-color: var(--color-deep-blue);
    color: var(--color-light-grey);
    padding: 2rem 0;
    font-weight: 300;
}

/* AOS animations overrides */
[data-aos] {
    pointer-events: none;
}

.aos-animate {
    pointer-events: auto;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-deep-blue);
}

::-webkit-scrollbar-thumb {
    background: var(--color-greyish-blue);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent);
}