:root{
  --fg: #ffffff;
  --fg-dim: rgba(255,255,255,0.85);
  --fg-muted: rgba(255,255,255,0.65);
  --accent: #9ad8ff;
  --card: rgba(0,0,0,0.55);
  --border: rgba(255,255,255,0.18);
  --shadow: rgba(0,0,0,0.5);
  --maxw: 980px;
}

*{ box-sizing: border-box; }
html,body{ height:100%; }
body{
  margin:0;
  color:var(--fg);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  line-height:1.55;
  background:#000;
  background-image: url('achtergrond.jpg');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  position: relative;
}
/* dark overlay to keep text readable */
body::before{
  content:"";
  position:fixed;
  inset:0;
  background: radial-gradient(ellipse at center, rgba(0,0,0,0.25) 0%, rgba(0,0,0,0.75) 55%, rgba(0,0,0,0.9) 100%);
  pointer-events:none;
}

a{ color: var(--accent); text-decoration: none; }
a:hover{ text-decoration: underline; }

header{
  position: sticky;
  top: 0;
  z-index:10;
  backdrop-filter: blur(8px);
  background: linear-gradient(180deg, rgba(0,0,0,0.7), rgba(0,0,0,0.35));
  border-bottom: 1px solid var(--border);
}
.nav{
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 20px;
  display:flex;
  align-items:center;
  gap:18px;
}
.nav .brand{
  display:flex; align-items:center; gap:12px;
  font-weight:700; letter-spacing:0.2px;
}
.nav img.logo{
  width: 36px; height: 36px; object-fit: cover; border-radius:8px; box-shadow: 0 4px 14px var(--shadow);
}
.nav a{ color:var(--fg); opacity:0.9; }
.nav a.active{ color:var(--accent); }
.nav .spacer{ flex:1; }
.nav .links{ display:flex; gap:14px; align-items:center; flex-wrap:wrap; }

main{ display:block; }
.hero{
  max-width: var(--maxw);
  margin: 36px auto 0;
  padding: 24px 20px;
}
.hero h1{
  margin: 0 0 8px 0;
  font-size: clamp(28px, 4vw, 40px);
  line-height:1.2;
}
.hero p.lead{
  margin:0;
  color: var(--fg-dim);
  font-size: clamp(15px, 2.5vw, 18px);
}

.section{
  max-width: var(--maxw);
  margin: 22px auto;
  padding: 20px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 8px 30px var(--shadow);
}
.section h2{
  margin-top:0;
  margin-bottom:8px;
}
.kv{
  display:grid; gap:10px; grid-template-columns: 1fr 1fr;
}
@media (max-width: 720px){
  .kv{ grid-template-columns: 1fr; }
}

.footer{
  max-width: var(--maxw);
  margin: 30px auto 40px;
  padding: 14px 20px;
  color: var(--fg-muted);
  border-top: 1px solid var(--border);
}
.small{ font-size: 13px; color: var(--fg-muted); }
.badge{ display:inline-block; padding:4px 8px; border:1px solid var(--border); border-radius:8px; background:rgba(255,255,255,0.06); }
ul{ margin:10px 0 0 18px; }
code{ font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; background: rgba(255,255,255,0.08); padding: 0 6px; border-radius: 6px; }