*{margin:0;padding:0;box-sizing:border-box}
:root{--bg:#03070c;--text:#fff;--muted:#8996a3;--soft:#a9b6c3;--accent:#55bfff;--ice:#dcefff;--line:rgba(255,255,255,.09);--glass:linear-gradient(135deg,rgba(255,255,255,.055),rgba(255,255,255,.015))}
html{width:100%;scroll-behavior:smooth;scroll-padding-top:84px}
body{width:100%;min-height:100vh;overflow-x:hidden;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
a{color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}
.skip{position:absolute;left:-999px;top:8px;z-index:100;padding:10px 16px;background:#0b1520;color:#fff;border-radius:8px}
.skip:focus{left:8px}

/* achtergrond */
.background{position:fixed;inset:0;overflow:hidden;background:radial-gradient(circle at 50% 50%,rgba(20,100,170,.16),transparent 35%),var(--bg)}
.grid{position:absolute;inset:-100px;background-image:linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);background-size:55px 55px;transform:perspective(500px) rotateX(55deg) translateY(120px) scale(1.5);mask-image:linear-gradient(to bottom,transparent,#000 25%,#000 75%,transparent);animation:gridMove 15s linear infinite}
@keyframes gridMove{to{transform:perspective(500px) rotateX(55deg) translateY(175px) scale(1.5)}}
.orb{position:absolute;border-radius:50%;filter:blur(90px);opacity:.35;animation:float 12s ease-in-out infinite}
.orb.one{width:450px;height:450px;background:#06f;top:-200px;left:-150px}
.orb.two{width:400px;height:400px;background:#00a6ff;right:-150px;bottom:-150px;animation-delay:-5s}
.orb.three{width:250px;height:250px;background:#06c;left:45%;top:50%;animation-delay:-8s}
@keyframes float{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(40px,-50px) scale(1.15)}}
.particles{position:absolute;inset:0;pointer-events:none}
.particle{position:absolute;width:2px;height:2px;background:#8ed4ff;border-radius:50%;box-shadow:0 0 8px #42b5ff;animation:rise linear infinite,blink ease-in-out infinite alternate}
@keyframes rise{from{transform:translateY(110vh)}to{transform:translateY(-10vh)}}
@keyframes blink{from{opacity:.1}to{opacity:1}}
.mouse-light{position:fixed;width:350px;height:350px;border-radius:50%;pointer-events:none;background:radial-gradient(circle,rgba(50,160,255,.12),transparent 70%);transform:translate(-50%,-50%);z-index:2;left:-999px;top:-999px}

/* navigatie */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;padding:12px 16px}
.nav-inner{max-width:1000px;margin:0 auto;display:flex;align-items:center;gap:14px;padding:8px 14px;border:1px solid var(--line);border-radius:100px;background:rgba(5,12,20,.6);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}
.brand{flex-shrink:0;display:grid;place-items:center;width:34px;height:34px;border-radius:50%;border:1px solid rgba(85,191,255,.4);background:rgba(85,191,255,.1);color:var(--ice);font-size:13px;font-weight:700;text-decoration:none;letter-spacing:.5px}
.nav nav{flex:1;min-width:0}
.nav ul{display:flex;gap:2px;list-style:none;overflow-x:auto;scrollbar-width:none}
.nav ul::-webkit-scrollbar{display:none}
.nav ul a{display:block;padding:7px 12px;border-radius:100px;color:var(--soft);font-size:14px;text-decoration:none;white-space:nowrap;transition:background .2s,color .2s}
.nav ul a:hover{background:rgba(255,255,255,.07);color:#fff}
.lang{flex-shrink:0;display:flex;gap:2px}
.lang a{padding:6px 9px;border-radius:100px;color:var(--muted);font-size:12px;font-weight:700;letter-spacing:.6px;text-decoration:none}
.lang a:hover{color:#fff}
.lang a[aria-current]{background:rgba(85,191,255,.16);color:var(--ice)}

/* hero */
main{position:relative;z-index:10}
.hero{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:100px 30px 60px;text-align:center}
.box{position:relative;width:min(900px,calc(100vw - 40px));padding:60px 70px;border:1px solid var(--line);border-radius:28px;background:var(--glass);backdrop-filter:blur(25px);-webkit-backdrop-filter:blur(25px);box-shadow:0 30px 100px rgba(0,0,0,.45),inset 0 1px rgba(255,255,255,.08);animation:boxAppear 1.4s cubic-bezier(.16,1,.3,1) forwards;opacity:0;transform:translateY(35px) scale(.95)}
@keyframes boxAppear{to{opacity:1;transform:none}}
.photo{display:block;width:150px;height:150px;margin:0 auto 26px;border-radius:50%;object-fit:cover;border:1px solid rgba(85,191,255,.45);box-shadow:0 0 0 6px rgba(85,191,255,.07),0 0 50px rgba(50,160,255,.25);animation:fadeUp 1s .3s both}
.avatar{display:grid;place-items:center;background:radial-gradient(circle at 30% 25%,rgba(85,191,255,.35),rgba(6,102,255,.12));color:var(--ice);font-size:48px;font-weight:700;letter-spacing:2px}
.status{display:inline-flex;align-items:center;gap:10px;padding:9px 16px;border:1px solid var(--line);border-radius:100px;background:rgba(255,255,255,.035);color:#91a0ae;font-size:13px;letter-spacing:.5px;animation:fadeUp 1s .5s both}
.dot{width:7px;height:7px;flex-shrink:0;border-radius:50%;background:#38e58a;box-shadow:0 0 5px #38e58a,0 0 15px #38e58a;animation:dotPulse 2s infinite}
@keyframes dotPulse{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(.65);opacity:.5}}
@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
h1{display:block;margin-top:26px;padding:0 14px 10px;font-size:clamp(42px,7vw,86px);line-height:1.08;letter-spacing:-2.5px;font-weight:750;background:linear-gradient(120deg,#fff 20%,#8cd5ff 50%,#fff 80%);background-size:200% auto;-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;animation:fadeUp 1s .7s both,shine 5s linear infinite}
@keyframes shine{to{background-position:200% center}}
.line{width:80px;height:1px;margin:26px auto;background:linear-gradient(90deg,transparent,var(--accent),transparent);animation:lineGrow 1.2s 1s both}
@keyframes lineGrow{from{width:0;opacity:0}to{width:80px;opacity:1}}
.subtitle{color:#9fb0bf;font-size:17px;animation:fadeUp 1s 1.15s both}
.intro{max-width:600px;margin:14px auto 0;color:var(--muted);font-size:15px;animation:fadeUp 1s 1.3s both}
.cta{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-top:32px;animation:fadeUp 1s 1.45s both}
.btn{display:inline-block;padding:12px 26px;border:1px solid rgba(85,191,255,.4);border-radius:100px;background:rgba(85,191,255,.1);color:var(--ice);font:inherit;font-size:15px;text-decoration:none;cursor:pointer;transition:background .2s,transform .2s}
.btn:hover{background:rgba(85,191,255,.22);transform:translateY(-2px)}
.btn.primary{background:rgba(85,191,255,.22);border-color:rgba(85,191,255,.65)}
.btn:disabled{opacity:.6;cursor:wait;transform:none}

/* secties */
.wrap{max-width:900px;margin:0 auto;padding:0 20px 40px;display:grid;gap:26px}
.card{padding:44px 50px;border:1px solid var(--line);border-radius:24px;background:var(--glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);box-shadow:0 20px 70px rgba(0,0,0,.35),inset 0 1px rgba(255,255,255,.07)}
.card h2{margin-bottom:22px;color:var(--ice);font-size:28px;font-weight:600;letter-spacing:-.3px}
.card h3{color:#fff;font-size:18px;font-weight:600}
.prose p{margin-bottom:16px;color:#a7b4c1;font-size:16px;line-height:1.8}
.prose p:last-child{margin-bottom:0}
.muted{color:var(--muted)}
.lead{margin-bottom:18px;color:#a7b4c1}

.timeline{list-style:none;position:relative;display:grid;gap:26px;padding-left:26px}
.timeline::before{content:"";position:absolute;left:5px;top:6px;bottom:6px;width:1px;background:linear-gradient(var(--accent),rgba(85,191,255,.05))}
.timeline li{position:relative}
.timeline li::before{content:"";position:absolute;left:-26px;top:7px;width:11px;height:11px;border-radius:50%;background:var(--bg);border:2px solid var(--accent);box-shadow:0 0 12px rgba(85,191,255,.5)}
.period{display:block;margin-bottom:2px;color:var(--accent);font-size:13px;letter-spacing:.6px}
.org{color:#9fb0bf;font-size:15px}
.desc{margin-top:6px;color:var(--muted);font-size:15px}

.skill-groups{display:grid;gap:22px}
.skill-group h3{margin-bottom:10px;font-size:15px;color:#9fb0bf;font-weight:600;letter-spacing:.4px}
.chips{display:flex;flex-wrap:wrap;gap:8px;list-style:none}
.chips li{padding:7px 14px;border:1px solid rgba(85,191,255,.25);border-radius:100px;background:rgba(85,191,255,.07);color:var(--ice);font-size:14px}
.chips.small li{padding:4px 10px;font-size:12px;color:#9fb0bf;border-color:var(--line);background:rgba(255,255,255,.03)}

.certs{list-style:none;display:grid;gap:12px}
.certs li{display:flex;flex-wrap:wrap;justify-content:space-between;gap:6px 18px;padding:14px 18px;border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.025)}

.projects{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px}
.project{display:flex;flex-direction:column;gap:10px;padding:22px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.025);transition:border-color .2s,transform .2s}
.project:hover{border-color:rgba(85,191,255,.4);transform:translateY(-3px)}
.project p{color:var(--muted);font-size:15px}
.more{margin-top:auto;padding-top:4px;font-size:14px;text-decoration:none}
.more:hover{text-decoration:underline}

/* formulier */
.social{display:flex;flex-wrap:wrap;gap:16px;margin-bottom:22px}
.social a{font-size:15px}
form{display:grid;gap:18px;max-width:620px}
.field{display:grid;gap:7px}
label{color:#9fb0bf;font-size:14px}
input,textarea{width:100%;padding:13px 16px;border:1px solid rgba(255,255,255,.14);border-radius:14px;background:rgba(255,255,255,.04);color:#fff;font:inherit;font-size:15px;transition:border-color .2s,background .2s}
textarea{resize:vertical;min-height:140px}
input:focus,textarea:focus{outline:none;border-color:var(--accent);background:rgba(85,191,255,.06);box-shadow:0 0 0 3px rgba(85,191,255,.18)}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
form .btn{justify-self:start}
.form-status{min-height:1.4em;font-size:15px;color:#7ee2a8}
.form-status.error{color:#ff9a9a}
.privacy{color:#5f6d7a;font-size:12.5px}

footer{position:relative;z-index:20;width:100%;padding:30px 25px 40px;text-align:center;color:#4a5763;font-size:12px;letter-spacing:1px}

/* scroll-onthulling (alleen met JS) */
.js .reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s cubic-bezier(.16,1,.3,1)}
.js .reveal.in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition:none!important}
  .js .reveal{opacity:1;transform:none}
}
@media (max-width:700px){
  .nav{padding:8px}
  .nav-inner{gap:8px;padding:6px 8px;border-radius:22px}
  .nav ul a{padding:7px 9px;font-size:13px}
  .hero{padding:90px 15px 40px}
  .box{width:calc(100vw - 30px);padding:40px 20px;border-radius:22px}
  h1{font-size:clamp(36px,11vw,58px);letter-spacing:-2px;padding:0 5px 8px}
  .photo{width:120px;height:120px}
  .grid{opacity:.5}
  .card{padding:30px 22px;border-radius:20px}
  .card h2{font-size:24px}
}