:root {
    --primary: #0089ff;
    --secondary: #ff6b00;
    --accent: #00e676;
    --dark: #0d1117;
    --light: #f5f8ff;
    --gray: #8b96a5;
    --transition: all 0.4s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
}

p {
    margin-bottom: 1rem;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 0;
    background-color: rgba(255, 255, 255, 0.1);
    transition: var(--transition);
    z-index: -1;
}

.btn:hover::after {
    height: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #00b0ff);
    color: white;
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary), #ff9d45);
    color: white;
}

.btn-accent {
    background: linear-gradient(135deg, var(--accent), #69f0ae);
    color: var(--dark);
}

.btn i {
    margin-left: 0.5rem;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
}

.header.scrolled {
    background-color: var(--dark);
    padding: 0.5rem 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

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

.logo {
    font-size: 1.75rem;
    font-weight: 900;
    color: white;
    display: flex;
    align-items: center;
}

.logo span {
    color: var(--secondary);
}

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

.nav-link {
    color: white;
    position: relative;
}

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

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

.hamburger {
    display: none;
    cursor: pointer;
}

.hamburger-line {
    width: 25px;
    height: 3px;
    background-color: white;
    margin: 5px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    color: white;
    background: linear-gradient(rgba(13, 17, 23, 0.8), rgba(13, 17, 23, 0.9)), url('/api/placeholder/1600/900') center/cover no-repeat;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 137, 255, 0.3), rgba(255, 107, 0, 0.3));
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
}

.hero-subtitle {
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--secondary);
    font-weight: 600;
    margin-bottom: 1rem;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.hero-shape {
    position: absolute;
    z-index: 0;
    opacity: 0.1;
}

.hero-shape-1 {
    width: 300px;
    height: 300px;
    border-radius: 58% 42% 38% 62% / 42% 55% 45% 58%;
    background: var(--secondary);
    bottom: -100px;
    right: 10%;
    animation: float 8s ease-in-out infinite;
}

.hero-shape-2 {
    width: 200px;
    height: 200px;
    border-radius: 38% 62% 63% 37% / 41% 44% 56% 59%;
    background: var(--primary);
    top: 20%;
    right: 20%;
    animation: float 6s ease-in-out infinite reverse;
}

.hero-shape-3 {
    width: 400px;
    height: 400px;
    border-radius: 46% 54% 42% 58% / 47% 39% 61% 53%;
    background: var(--accent);
    top: -150px;
    left: -100px;
    animation: float 10s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translate(0, 0) rotate(0deg); }
    50% { transform: translate(5px, 10px) rotate(5deg); }
    100% { transform: translate(0, 0) rotate(0deg); }
}

/* About/Voordelen Section */
.section {
    padding: 6rem 0;
    position: relative;
}

.section-dark {
    background-color: var(--dark);
    color: white;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.section-title h2 {
    font-size: 2.5rem;
    display: inline-block;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--secondary);
    margin: 0.5rem auto 0;
    border-radius: 2px;
}

.voordelen-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.voordeel-card {
    background-color: var(--light);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
    color: var(--dark);
    position: relative;
    padding: 2rem;
    text-align: center;
}

.voordeel-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.voordeel-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: var(--primary);
    display: inline-block;
    position: relative;
}

.voordeel-icon::after {
    content: '';
    position: absolute;
    width: 50px;
    height: 50px;
    background-color: rgba(0, 137, 255, 0.1);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: -1;
}

.voordeel-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

/* Diensten Section */
.diensten-tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 3rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.dienst-tab {
    padding: 0.75rem 1.5rem;
    background-color: rgba(0, 0, 0, 0.05);
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
}

.dienst-tab.active {
    background-color: var(--primary);
    color: white;
}

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

.dienst-item {
    display: none;
    animation: fadeIn 0.5s ease forwards;
}

.dienst-item.active {
    display: block;
}

.dienst-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.dienst-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--primary), #00b0ff);
    color: white;
}

.dienst-title {
    font-size: 1.5rem;
}

.dienst-description {
    margin-bottom: 1.5rem;
}

.dienst-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

.dienst-feature {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dienst-feature i {
    color: var(--accent);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Prijzen Section */
.prijzen-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.prijs-card {
    background-color: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    text-align: center;
    position: relative;
    display: flex;
    flex-direction: column;
}

.prijs-card:hover {
    transform: scale(1.05);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.prijs-card.popular {
    border: 2px solid var(--secondary);
    transform: scale(1.05);
}

.prijs-card.popular:hover {
    transform: scale(1.1);
}

.popular-badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--secondary);
    color: white;
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    font-weight: 600;
    border-bottom-left-radius: 16px;
}

.prijs-header {
    padding: 2rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.prijs-type {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.prijs-amount {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.prijs-period {
    color: var(--gray);
    font-size: 0.9rem;
}

.prijs-features {
    padding: 2rem;
    flex-grow: 1;
}

.prijs-feature {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.prijs-feature i {
    color: var(--accent);
}

.prijs-footer {
    padding: 0 2rem 2rem;
}

/* Gym Photos Section */
.gym-photos {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    overflow: hidden;
}

.photo-slider {
    position: relative;
    overflow: hidden;
    border-radius: 16px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.photo-slider-container {
    display: flex;
    transition: transform 0.5s ease;
}

.photo-slide {
    min-width: 100%;
    position: relative;
}

.photo-img {
    width: 100%;
    height: auto;
    display: block;
}

.photo-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 1rem;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    color: white;
    font-weight: 600;
}

.photo-slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.8);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
    color: var(--dark);
}

.photo-slider-arrow:hover {
    background-color: var(--primary);
    color: white;
}

.photo-slider-prev {
    left: 20px;
}

.photo-slider-next {
    right: 20px;
}

.photo-slider-controls {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 0.5rem;
    z-index: 10;
}

.photo-slider-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: var(--transition);
}

.photo-slider-dot.active {
    background-color: var(--primary);
    transform: scale(1.2);
}


/* Reviews Section */
.reviews-slider {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    overflow: hidden;
}

.reviews-container {
    display: flex;
    transition: transform 0.5s ease;
}

.review {
    min-width: 100%;
    padding: 0 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.review-content {
    background-color: white;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
    position: relative;
    text-align: center;
}

.review-content::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    background-color: white;
    transform-origin: center;
    rotate: 45deg;
    box-shadow: 5px 5px 10px rgba(0, 0, 0, 0.05);
}

.review-content p {
    margin-bottom: 0;
    font-style: italic;
    color:black;
}

.review-content i.quote {
    font-size: 2rem;
    color: rgba(0, 0, 0, 0.1);
    position: absolute;
    top: 1rem;
    left: 1rem;
}

.review-author {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.review-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 0.5rem;
    border: 3px solid var(--primary);
}

.review-name {
    font-weight: 600;
}

.review-title {
    font-size: 0.9rem;
    color: var(--gray);
}

.review-rating {
    margin-top: 0.5rem;
    color: var(--secondary);
}

.slider-controls {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
    gap: 0.5rem;
}

.slider-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: var(--transition);
}

.slider-dot.active {
    background-color: var(--secondary);
}

.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: white;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
}

.slider-arrow:hover {
    background-color: var(--primary);
    color: white;
}

.slider-prev {
    left: 0;
}

.slider-next {
    right: 0;
}

/* Contact Form */
.contact {
    position: relative;
}

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

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

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
}

.contact-text {
    flex-grow: 1;
}

.contact-text h4 {
    margin-bottom: 0.25rem;
}

.contact-social {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.social-icon:hover {
    background-color: var(--primary);
    color: white;
    transform: translateY(-5px);
}

.contact-form {
    background-color: white;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.form-title {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

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

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    font-family: inherit;
    font-size: inherit;
    transition: var(--transition);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(0, 137, 255, 0.2);
}

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

.form-button {
    width: 100%;
}

/* Footer */
.footer {
    background-color: var(--dark);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.footer-col h3 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
}

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

.footer-link {
    display: block;
    margin-bottom: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-link:hover {
    color: var(--secondary);
    transform: translateX(5px);
}

.footer-bottom {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 100;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.back-to-top.active {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
}

/* Responsive Design */
@media (max-width: 992px) {
    .voordelen-grid,
    .prijzen-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .hero-title {
        font-size: 2.8rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background-color: var(--dark);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        transition: right 0.5s ease;
        z-index: 1001;
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .hamburger {
        display: block;
        z-index: 1002;
    }
    
    .hamburger.active .hamburger-line:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .hamburger.active .hamburger-line:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .hamburger-line:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .dienst-features {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
}

@media (max-width: 576px) {
    .voordelen-grid,
    .prijzen-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .section {
        padding: 4rem 0;
    }
    
    .section-title h2 {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 0.9rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .slider-arrow {
        display: none;
    }
}