:root{--bg-color: #000000;--card-bg: #0a0a0a;--text-primary: #ffffff;--text-secondary: #888888;--accent-color: #ffffff;--accent-glow: rgba(255, 255, 255, .1);--border-color: rgba(255, 255, 255, .1);--glass-bg: rgba(255, 255, 255, .03);--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 2rem;--spacing-xl: 6rem;--radius-md: 0px;--radius-lg: 0px;--transition: all .6s cubic-bezier(.16, 1, .3, 1)}*{margin:0;padding:0;box-sizing:border-box;scrollbar-width:thin;scrollbar-color:#333 #000}::-webkit-scrollbar{width:4px}::-webkit-scrollbar-track{background:#000}::-webkit-scrollbar-thumb{background:#333}::-webkit-scrollbar-thumb:hover{background:#666}html{scroll-behavior:smooth;background:#000}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background-color:var(--bg-color);color:var(--text-primary);line-height:1.5;overflow-x:hidden;letter-spacing:-.01em}h1,h2,h3{font-weight:500;line-height:.9;text-transform:uppercase;letter-spacing:-.04em}a{text-decoration:none;color:inherit;transition:var(--transition)}ul{list-style:none}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 var(--spacing-md)}section{padding:var(--spacing-xl) 0}header{position:fixed;top:0;width:100%;z-index:1000;background:#00000080;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-bottom:1px solid var(--border-color)}nav{display:flex;justify-content:space-between;align-items:center;height:100px}.logo{display:flex;align-items:center;gap:.8rem;font-size:1.2rem;font-weight:600;letter-spacing:.2em;color:var(--text-primary)}.logo img{height:80px;width:auto;margin-left:-15px;filter:brightness(1.5)}.nav-links{display:flex;gap:var(--spacing-lg)}.nav-links a{font-size:.75rem;text-transform:uppercase;letter-spacing:.1em;color:var(--text-secondary)}.nav-links a:hover{color:var(--text-primary)}.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:flex-start;text-align:left;overflow:hidden;padding-top:100px}.hero-content{position:relative;z-index:10;max-width:800px}.hero h1{font-size:clamp(4rem,12vw,10rem);margin-bottom:var(--spacing-md);color:#fff}.hero p{font-size:1.1rem;color:var(--text-secondary);max-width:400px;margin:0 0 var(--spacing-lg);line-height:1.4}.arc-container{position:absolute;top:50%;right:-10%;transform:translateY(-50%) rotate(-15deg);width:80vh;height:80vh;z-index:1;pointer-events:none}.arc{width:100%;height:100%;border:2px solid rgba(255,255,255,.1);border-top:2px solid rgba(255,255,255,.8);border-radius:50%;filter:blur(1px);box-shadow:0 0 50px #ffffff1a,inset 0 0 50px #ffffff0d;animation:rotateArc 15s linear infinite;position:relative}.arc:before{content:"";position:absolute;top:-10px;left:50%;width:20px;height:20px;background:#fff;border-radius:50%;filter:blur(10px);box-shadow:0 0 30px #fff}@keyframes rotateArc{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.hero-gradient{position:absolute;top:0;left:0;width:100%;height:100%;background:radial-gradient(circle at 70% 30%,rgba(255,255,255,.05) 0%,transparent 70%);pointer-events:none}.btn{display:inline-block;padding:1rem 2.5rem;font-size:.75rem;text-transform:uppercase;letter-spacing:.15em;font-weight:600;cursor:pointer;border:1px solid var(--border-color);transition:var(--transition);position:relative;overflow:hidden}.btn-primary{background-color:#fff;color:#000}.btn-primary:hover{background-color:#000;color:#fff;border-color:#fff}.btn-outline{background:transparent;color:#fff}.btn-outline:hover{background:#fff;color:#000}.btn-sm{padding:.5rem 1rem;font-size:.875rem}.filter-controls{display:flex;justify-content:center;gap:var(--spacing-md);margin-bottom:var(--spacing-xl);flex-wrap:wrap}.filter-controls label{padding:.6rem 1.5rem;background:var(--card-bg);border:1px solid var(--border-color);border-radius:100px;cursor:pointer;transition:var(--transition);color:var(--text-secondary)}.filter-controls label:hover{border-color:var(--accent-color);color:var(--text-primary)}input[type=radio]{display:none}#filter-all:checked~.filter-controls label[for=filter-all],#filter-verandio:checked~.filter-controls label[for=filter-verandio],#filter-kyokushin:checked~.filter-controls label[for=filter-kyokushin],#filter-vanklasse:checked~.filter-controls label[for=filter-vanklasse]{background:var(--accent-color);color:#000;border-color:var(--accent-color)}#projecten{perspective:1000px}.projects-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(400px,1fr));gap:1px;background:var(--border-color);border:1px solid var(--border-color)}.project-card{background:#0a0a0a;padding:var(--spacing-xl) var(--spacing-lg);transition:var(--transition);display:none;transform-style:preserve-3d;border:1px solid var(--border-color)}#filter-all:checked~.projects-grid .project-card{display:block}#filter-verandio:checked~.projects-grid .project-card.verandio{display:block}#filter-kyokushin:checked~.projects-grid .project-card.kyokushin{display:block}#filter-vanklasse:checked~.projects-grid .project-card.vanklasse{display:block}.project-card:hover{background:#050505;transform:rotateY(5deg) rotateX(2deg);box-shadow:-20px 20px 60px #ffffff08}.project-preview{height:400px;background:#000;border:1px solid var(--border-color);margin-bottom:var(--spacing-lg);display:flex;align-items:center;justify-content:center;padding:var(--spacing-md);position:relative}.project-preview:after{content:"";position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(to bottom,transparent,rgba(255,255,255,.05));pointer-events:none}.project-preview img{max-width:100%;max-height:100%;object-fit:contain;transition:var(--transition);filter:grayscale(1) brightness(1.2) contrast(1.1)}.project-card:hover .project-preview img{transform:scale(1.1) translateZ(50px);filter:grayscale(0) brightness(1)}.project-content h3{font-size:2.5rem;margin-bottom:var(--spacing-md)}.badge{font-size:.6rem;text-transform:uppercase;letter-spacing:.1em;padding:.4rem .8rem;border:1px solid var(--border-color);color:var(--text-secondary)}@supports (animation-timeline: view()){.project-card{animation:reveal 1s linear both;animation-timeline:view();animation-range:entry 10% cover 30%}}@keyframes reveal{0%{opacity:.2;transform:translateY(50px) rotateX(10deg)}to{opacity:1;transform:translateY(0) rotateX(0)}}.project-actions{display:flex;gap:var(--spacing-md)}.project-details{margin-top:var(--spacing-xl)}.detail-block{background:var(--card-bg);padding:var(--spacing-xl);border-radius:var(--radius-lg);margin-bottom:var(--spacing-lg);border:1px solid var(--border-color)}.detail-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:var(--spacing-lg);margin-top:var(--spacing-lg)}.detail-item h4{color:var(--accent-color);margin-bottom:.5rem;text-transform:uppercase;font-size:.8rem;letter-spacing:1px}.about-content{display:grid;grid-template-columns:1fr 1fr;gap:var(--spacing-xl);align-items:flex-start}.about-content h2{font-size:4rem;margin-bottom:var(--spacing-lg)}.skills-list{display:grid;grid-template-columns:1fr;gap:var(--spacing-sm);margin-top:var(--spacing-lg)}.skill-item{font-size:.8rem;text-transform:uppercase;letter-spacing:.1em;color:var(--text-secondary);border-bottom:1px solid var(--border-color);padding:1rem 0}.contact-form{max-width:800px;margin:0 auto;background:#0a0a0a;padding:var(--spacing-xl);border:1px solid var(--border-color);position:relative;overflow:hidden}.contact-form:before{content:"";position:absolute;top:0;left:0;width:100%;height:2px;background:linear-gradient(90deg,transparent,#fff,transparent);animation:scanLine 3s linear infinite}@keyframes scanLine{0%{transform:translate(-100%)}to{transform:translate(100%)}}.form-group{margin-bottom:var(--spacing-lg);position:relative}.form-group label{font-size:.6rem;text-transform:uppercase;letter-spacing:.2em;color:var(--text-secondary);margin-bottom:.5rem;display:block}.form-group input,.form-group textarea{width:100%;background:#ffffff08;border:1px solid var(--border-color);border-radius:0;padding:1rem;font-size:1rem;color:#fff;transition:var(--transition)}.form-group input:focus,.form-group textarea:focus{outline:none;border-color:#fff;background:#ffffff14;box-shadow:0 0 20px #ffffff1a}.form-group input::placeholder,.form-group textarea::placeholder{color:#444}.contact-form button{margin-top:var(--spacing-lg);width:100%;background:#fff;color:#000;border:none;padding:1.2rem;font-size:.8rem;text-transform:uppercase;letter-spacing:.2em;font-weight:700;cursor:pointer;transition:var(--transition)}.contact-form button:hover{background:#000;color:#fff;box-shadow:0 0 30px #fff3}footer{padding:var(--spacing-xl) 0;border-top:1px solid var(--border-color);text-align:center}.social-links{display:flex;justify-content:center;gap:var(--spacing-lg);margin-top:var(--spacing-md)}.social-links a:hover{color:var(--accent-color)}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--accent-color);outline-offset:4px}@media(max-width:1024px){.projects-grid{grid-template-columns:1fr}.arc-container{width:60vh;height:60vh;right:-20%}}@media(max-width:768px){:root{--spacing-xl: 4rem}.about-content{grid-template-columns:1fr;gap:var(--spacing-lg)}.nav-links{display:none}.hero{justify-content:center;text-align:center;padding-top:120px}.logo img{height:60px}.hero h1{font-size:clamp(3rem,15vw,5rem);line-height:1}.hero p{margin:0 auto var(--spacing-lg)}.hero-content{display:flex;flex-direction:column;align-items:center}.arc-container{width:50vh;height:50vh;right:50%;transform:translate(50%,-50%) rotate(-15deg);opacity:.3}.project-content h3{font-size:1.8rem}.about-content h2{font-size:2.5rem}.contact-form{padding:var(--spacing-lg)}}