/* ============ THEME TOKENS ============ */
:root{
  --bg:            #05070d;
  --bg-alt:        #080c16;
  --bg-tint:       #0a1220;
  --panel:         #0d1524;
  --panel-hi:      #101b2e;
  --border:        rgba(255,255,255,.08);
  --border-hi:     rgba(120,200,255,.25);

  --text:          #eaf1fb;
  --text-dim:      #9fb0c9;
  --text-faint:    #667792;

  --cyan:          #35e6ff;
  --cyan-soft:     #7ff2ff;
  --blue:          #3b7bff;
  --blue-deep:     #1c3fa8;
  --green:         #35e6a8;
  --amber:         #ffb545;
  --red:           #ff5d6c;

  --grad: linear-gradient(120deg, var(--cyan) 0%, var(--blue) 60%, #7c5cff 100%);
  --grad-safety: linear-gradient(120deg, var(--amber) 0%, var(--red) 100%);

  --radius: 16px;
  --radius-sm: 10px;
  --shadow-glow: 0 0 0 1px var(--border), 0 20px 60px -20px rgba(53,230,255,.15);

  --font-display: "Space Grotesk", "Inter", sans-serif;
  --font-body: "Inter", sans-serif;
  --font-mono: "JetBrains Mono", monospace;

  --maxw: 1180px;
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
html,body{ margin:0; padding:0; }

body{
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1,h2,h3,h4{
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 .5em;
  letter-spacing: -0.01em;
}

p{ margin: 0 0 1em; color: var(--text-dim); }
strong{ color: var(--text); font-weight: 600; }
.card__detail-inner p:last-child,
.qa-item__a-inner p:last-child,
.micro-card__a p:last-child,
.tab-panel p:last-child{ margin-bottom: 0; }
.spec-note{
  font-family: var(--font-mono); font-size: .74rem; color: var(--amber);
  border-left: 2px solid var(--amber); padding-left: .7em; margin-top: .8em; opacity: .85;
}
a{ color: inherit; text-decoration: none; }
ul,ol{ margin:0; padding:0; list-style:none; }
button{ font-family: inherit; cursor: pointer; }
img{ max-width:100%; display:block; }

.grad-text{
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.grad-text--safety{ background: var(--grad-safety); -webkit-background-clip:text; background-clip:text; }

.kicker{
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 1rem;
  padding: .3em .8em;
  border: 1px solid var(--border-hi);
  border-radius: 999px;
  background: rgba(53,230,255,.06);
}
.kicker.safety{ color: var(--amber); border-color: rgba(255,181,69,.3); background: rgba(255,181,69,.06); }

.lead{ font-size: 1.15rem; color: var(--text-dim); max-width: 640px; }

/* ============ PROGRESS BAR ============ */
.progress-bar{
  position: fixed; top:0; left:0; height:3px; width:0%;
  background: var(--grad); z-index: 999; transition: width .1s linear;
}

/* ============ NAV ============ */
.nav{
  position: fixed; top:0; left:0; right:0; z-index: 500;
  display:flex; align-items:center; justify-content:space-between;
  padding: 14px clamp(16px,4vw,48px);
  background: rgba(5,7,13,.55);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--border);
  transition: background .3s, border-color .3s;
}
.nav__brand{ display:flex; align-items:center; gap:.6em; font-family: var(--font-display); font-weight:600; }
.nav__brand-mark{
  display:inline-flex; align-items:center; justify-content:center;
  width: 34px; height:34px; border-radius: 9px;
  background: var(--grad); color:#04121a; font-size: .85rem; font-weight:700;
}
.nav__brand-text{ font-size: .95rem; color: var(--text); }
.nav__links{ display:flex; gap: 2rem; }
.nav__links a{
  font-size: .88rem; color: var(--text-dim); position: relative; padding: .2em 0;
  transition: color .2s;
}
.nav__links a:hover, .nav__links a.active{ color: var(--text); }
.nav__links a.active::after{
  content:""; position:absolute; left:0; right:0; bottom:-6px; height:2px; background: var(--grad); border-radius: 2px;
}
.nav__toggle{ display:none; flex-direction:column; gap:5px; background:none; border:none; padding: 8px; }
.nav__toggle span{ width:22px; height:2px; background: var(--text); border-radius:2px; }

/* ============ HERO ============ */
.hero{
  position: relative; min-height: 100svh; display:flex; align-items:center; justify-content:center;
  overflow:hidden; padding: 120px 24px 60px;
  background: radial-gradient(ellipse at 50% -10%, #0d2440 0%, var(--bg) 60%);
}
.hero__canvas{ position:absolute; inset:0; width:100%; height:100%; opacity:.7; }
.hero__vignette{
  position:absolute; inset:0;
  background: radial-gradient(ellipse at 50% 30%, transparent 30%, var(--bg) 92%);
  pointer-events:none;
}
.hero__content{ position:relative; z-index:2; max-width: 860px; text-align:center; margin: 0 auto; }
.hero__eyebrow{
  font-family: var(--font-mono); font-size: .8rem; letter-spacing: .1em; text-transform: uppercase;
  color: var(--cyan-soft); margin-bottom: 1.2rem;
}
.hero__title{ font-size: clamp(2.6rem, 7vw, 5rem); margin-bottom: .4em; }
.hero__subtitle{ font-size: clamp(1.05rem,2.4vw,1.4rem); color: var(--text); font-weight:500; max-width: 640px; margin: 0 auto 1em; }
.hero__intro{ max-width: 620px; margin: 0 auto 2em; color: var(--text-dim); }
.hero__actions{ display:flex; gap: 1rem; justify-content:center; flex-wrap:wrap; }

.btn{
  display:inline-flex; align-items:center; gap:.5em;
  padding: .85em 1.7em; border-radius: 999px; font-weight:600; font-size: .95rem;
  transition: transform .2s, box-shadow .2s, background .2s, border-color .2s;
  border: 1px solid transparent;
}
.btn--primary{ background: var(--grad); color: #041019; }
.btn--primary:hover{ transform: translateY(-2px); box-shadow: 0 12px 30px -8px rgba(53,230,255,.45); }
.btn--ghost{ border-color: var(--border-hi); color: var(--text); background: rgba(255,255,255,.02); }
.btn--ghost:hover{ background: rgba(255,255,255,.06); transform: translateY(-2px); }

.hero__scroll{
  position:absolute; bottom: 28px; left:50%; transform: translateX(-50%);
  display:flex; flex-direction:column; align-items:center; gap:.5em; z-index:2;
  color: var(--text-faint); font-family: var(--font-mono); font-size: .7rem; letter-spacing:.1em; text-transform:uppercase;
}
.hero__scroll span{
  width:1px; height: 34px; background: linear-gradient(var(--cyan), transparent);
  animation: scrollpulse 1.8s ease-in-out infinite;
}
@keyframes scrollpulse{ 0%,100%{ opacity:.2; } 50%{ opacity:1; } }

/* ============ SECTION LAYOUT ============ */
.section{ padding: 110px clamp(20px,5vw,60px); max-width: var(--maxw); margin: 0 auto; }
.section--tint{ max-width: none; background: var(--bg-tint); }
.section--tint > *{ max-width: var(--maxw); margin-left:auto; margin-right:auto; }
.section--dark{ max-width: none; background: var(--bg-alt); border-top:1px solid var(--border); border-bottom:1px solid var(--border); }
.section--dark > *{ max-width: var(--maxw); margin-left:auto; margin-right:auto; }
.section--safety{ max-width:none; background: linear-gradient(180deg, var(--bg) 0%, #140d09 100%); }
.section--safety > *{ max-width: var(--maxw); margin-left:auto; margin-right:auto; }
.section--outro{ max-width:none; text-align:center; background: radial-gradient(ellipse at 50% 100%, #0d2440 0%, var(--bg) 65%); }

.section__head{ max-width: 760px; margin: 0 auto 3.5rem; text-align:left; }
.section--outro .section__head, .outro{ text-align:center; margin-left:auto; margin-right:auto; }

/* ============ REVEAL ANIM ============ */
.reveal{ opacity:0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in{ opacity:1; transform: none; }

/* ============ MINI FLOW (Project in 1 minuut) ============ */
.flow{ display:grid; grid-template-columns: repeat(5,1fr); gap: 1rem; counter-reset: step; }
.flow__step{
  position:relative; background: var(--panel); border:1px solid var(--border); border-radius: var(--radius);
  padding: 1.6rem 1.2rem 1.4rem; transition: transform .3s, border-color .3s, background .3s;
  transition-delay: calc(var(--i) * 60ms);
}
.flow__step:hover{ transform: translateY(-6px); border-color: var(--border-hi); background: var(--panel-hi); }
.flow__num{
  font-family: var(--font-mono); font-size: .75rem; color: var(--cyan);
  border:1px solid var(--border-hi); border-radius:999px; padding: .15em .6em; display:inline-block; margin-bottom: .8em;
}
.flow__step h3{ font-size: 1rem; margin-bottom:.4em; }
.flow__step p{ font-size: .88rem; margin:0; }
.flow__icon{ width:38px; height:38px; margin-bottom: .8em; border-radius:10px; background: var(--grad); opacity:.15; }
.flow__step:not(:last-child)::after{
  content:"→"; position:absolute; right:-1.1rem; top:50%; transform: translateY(-50%);
  color: var(--text-faint); font-size: 1.1rem; display:none;
}
@media (min-width: 1080px){ .flow__step:not(:last-child)::after{ display:block; } }

/* ============ WAAROM ============ */
.waarom{ display:grid; grid-template-columns: 1.3fr 1fr; gap: 3rem; align-items:center; }
.waarom__stats{ display:grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.stat{
  background: var(--panel); border:1px solid var(--border); border-radius: var(--radius);
  padding: 1.4rem; text-align:center;
}
.stat__value{ display:block; font-family: var(--font-display); font-size: 2.1rem; font-weight:700; color: var(--cyan-soft); }
.stat__value small{ font-size: .95rem; margin-left:.2em; color: var(--text-dim); font-weight:500; }
.stat__label{ display:block; font-size: .8rem; color: var(--text-dim); margin-top:.3em; }

/* ============ DIAGRAM FIGURES ============ */
.diagram-figure{
  margin: 0 0 3rem; border-radius: var(--radius); overflow:hidden; border:1px solid var(--border);
  background: var(--bg-tint); cursor: zoom-in;
}
.diagram-figure img{ width:100%; display:block; }
.diagram-figure figcaption{
  font-size: .82rem; color: var(--text-dim); padding: .9em 1.2em; border-top:1px solid var(--border);
}
.diagram-figure--safety{ border-color: rgba(255,181,69,.2); }

.outro__photos{ display:grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 2.5rem; }
.outro__photos figure{ margin:0; border-radius: var(--radius); overflow:hidden; border:1px solid var(--border); background: var(--bg-tint); }
.outro__photos img{ width:100%; aspect-ratio: 16/10; object-fit: cover; display:block; }
.outro__photos figcaption{ font-size: .78rem; color: var(--text-dim); padding: .8em 1em; text-align:left; }

/* ============ SYSTEM CARDS ============ */
.cards{ display:grid; grid-template-columns: repeat(4, 1fr); gap: 1.1rem; }
.card{
  background: var(--panel); border:1px solid var(--border); border-radius: var(--radius);
  padding: 1.5rem; cursor:pointer; transition: border-color .25s, transform .25s, background .25s;
  position:relative; overflow:hidden;
}
.card:hover{ border-color: var(--border-hi); transform: translateY(-4px); }
.card__icon{ width:44px; height:44px; border-radius:12px; display:flex; align-items:center; justify-content:center; background: rgba(53,230,255,.08); border:1px solid var(--border-hi); margin-bottom:1rem; }
.card__icon svg{ width:22px; height:22px; stroke: var(--cyan-soft); }
.card h3{ font-size: 1.05rem; margin-bottom:.4em; }
.card__simple{ font-size: .9rem; color: var(--text-dim); }
.card__why{ font-size: .82rem; color: var(--green); margin-top: .8em; padding-top:.8em; border-top:1px dashed var(--border); }
.card__detail{
  max-height:0; overflow:hidden; transition: max-height .4s ease, margin-top .4s ease; font-size: .85rem; margin-top:0;
}
.card.open .card__detail{ max-height: 500px; margin-top: 1em; }
.card__detail-inner{ padding-top: 1em; border-top:1px solid var(--border); color: var(--text-dim); }
.card__toggle{ font-family: var(--font-mono); font-size: .72rem; color: var(--cyan); margin-top: 1em; display:inline-block; }

/* ============ JOURNEY ============ */
.journey__track{ position:relative; margin-bottom: 2.5rem; }
.journey__line{ width:100%; height:60px; overflow:visible; }
.journey__line path{ fill:none; stroke: var(--border); stroke-width:2; }
.journey__line path.active{ stroke: url(#none); }
.journey__nodes{ position:absolute; top:0; left:0; right:0; display:flex; justify-content:space-between; padding: 0 2%; }
.journey__node{
  display:flex; flex-direction:column; align-items:center; gap:.6em; background:none; border:none; color: var(--text-faint);
  width: 90px;
}
.journey__dot{
  width:16px; height:16px; border-radius:50%; background: var(--panel); border:2px solid var(--border-hi);
  transition: all .3s;
}
.journey__node.active .journey__dot{ background: var(--cyan); box-shadow: 0 0 0 6px rgba(53,230,255,.15); border-color: var(--cyan); }
.journey__node span.label{ font-size: .72rem; text-align:center; line-height:1.2; color: var(--text-dim); }
.journey__node.active span.label{ color: var(--text); }
.journey__detail{
  background: var(--panel); border:1px solid var(--border); border-radius: var(--radius); padding: 2rem;
  display:grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items:center;
}
.journey__detail h3{ color: var(--cyan-soft); font-size:1.3rem; }
.journey__visual{
  aspect-ratio: 4/3; border-radius: var(--radius-sm); background: var(--bg-tint); border:1px solid var(--border);
  display:flex; align-items:center; justify-content:center; overflow:hidden;
}
.journey__visual img{ width:100%; height:100%; object-fit:cover; }

/* ============ SAFETY ============ */
.safety-grid{ display:grid; grid-template-columns: repeat(4,1fr); gap: 1rem; margin-bottom: 3rem; }
.safety-item{
  background: rgba(255,181,69,.04); border:1px solid rgba(255,181,69,.18); border-radius: var(--radius);
  padding: 1.3rem;
}
.safety-item h4{ font-size: .95rem; color: var(--amber); margin-bottom:.4em; }
.safety-item p{ font-size: .84rem; margin:0; }
.safety-qa{ display:grid; gap: .8rem; max-width: 820px; margin: 0 auto; }
.qa-item{ border:1px solid var(--border); border-radius: var(--radius-sm); overflow:hidden; background: var(--panel); }
.qa-item__q{
  display:flex; justify-content:space-between; align-items:center; padding: 1rem 1.3rem; font-weight:600; font-size:.95rem;
}
.qa-item__q::after{ content:"+"; color: var(--cyan); font-size:1.3rem; transition: transform .3s; }
.qa-item.open .qa-item__q::after{ transform: rotate(45deg); }
.qa-item__a{ max-height:0; overflow:hidden; transition: max-height .35s ease; }
.qa-item.open .qa-item__a{ max-height: 300px; }
.qa-item__a-inner{ padding: 0 1.3rem 1.2rem; font-size:.88rem; color: var(--text-dim); }

/* ============ TABS ============ */
.tabs__nav{ display:flex; flex-wrap:wrap; gap: .5rem; margin-bottom: 2rem; border-bottom: 1px solid var(--border); padding-bottom: 1rem; }
.tab-btn{
  background: var(--panel); border:1px solid var(--border); color: var(--text-dim);
  padding: .6em 1.1em; border-radius:999px; font-size:.85rem; transition: all .2s;
}
.tab-btn.active{ background: var(--grad); color:#04121a; border-color: transparent; font-weight:600; }
.tab-panel{ display:none; }
.tab-panel.active{ display:grid; grid-template-columns: 1.1fr .9fr; gap: 2.5rem; align-items:start; }
.tab-panel.active.tab-panel--full{ display:block; }
.tab-panel h3{ color: var(--cyan-soft); }
.tab-panel__visual{
  border-radius: var(--radius); overflow:hidden; border:1px solid var(--border); background: var(--bg-tint); cursor: zoom-in;
}
.tab-panel__list{ margin-top: 1rem; display:grid; gap:.5rem; }
.tab-panel__list li{ font-size: .88rem; color: var(--text-dim); padding-left: 1.2em; position:relative; }
.tab-panel__list li::before{ content:"›"; position:absolute; left:0; color: var(--cyan); }

.tab-panel__gallery{ display:grid; grid-template-columns: 1fr 1fr; gap: .8rem; }
.gallery-item{
  margin:0; border-radius: var(--radius-sm); overflow:hidden; border:1px solid var(--border); background: var(--bg-tint);
  cursor: zoom-in; transition: border-color .2s, transform .2s;
}
.gallery-item:hover{ border-color: var(--border-hi); transform: translateY(-2px); }
.gallery-item img{ width:100%; aspect-ratio: 4/3; object-fit: cover; display:block; }
.gallery-item figcaption{ font-size: .72rem; color: var(--text-dim); padding: .5em .7em; border-top: 1px solid var(--border); }

/* ============ MICRO GRID ============ */
.micro-grid{ display:grid; grid-template-columns: repeat(3,1fr); gap: 1rem; }
.micro-card{
  background: var(--panel); border:1px solid var(--border); border-radius: var(--radius-sm); padding: 1.2rem;
  transition: border-color .2s;
}
.micro-card.open{ border-color: var(--border-hi); }
.micro-card__q{ font-weight:600; font-size: .92rem; display:flex; justify-content:space-between; align-items:center; }
.micro-card__q::after{ content:"›"; color:var(--cyan); transition: transform .25s; }
.micro-card.open .micro-card__q::after{ transform: rotate(90deg); }
.micro-card__a{ max-height:0; overflow:hidden; transition: max-height .35s ease; font-size:.85rem; color: var(--text-dim); }
.micro-card.open .micro-card__a{ max-height: 260px; margin-top:.8em; }

/* ============ QUIZ ============ */
.quiz{ max-width: 700px; margin: 0 auto; background: var(--panel); border:1px solid var(--border); border-radius: var(--radius); padding: 2rem; }
.quiz__progress{ display:flex; gap:.4rem; margin-bottom: 1.6rem; }
.quiz__progress span{ flex:1; height:4px; border-radius:2px; background: var(--border); }
.quiz__progress span.done{ background: var(--grad); }
.quiz__question{ font-size: 1.1rem; margin-bottom: 1.2rem; }
.quiz__options{ display:grid; gap: .7rem; }
.quiz__option{
  text-align:left; background: var(--bg-tint); border:1px solid var(--border); border-radius: var(--radius-sm);
  padding: .9rem 1.1rem; color: var(--text); font-size: .92rem; transition: border-color .2s, background .2s;
}
.quiz__option:hover{ border-color: var(--border-hi); }
.quiz__option.correct{ border-color: var(--green); background: rgba(53,230,168,.08); }
.quiz__option.wrong{ border-color: var(--red); background: rgba(255,93,108,.08); }
.quiz__feedback{ margin-top: 1rem; font-size:.88rem; color: var(--text-dim); }
.quiz__result{ text-align:center; }
.quiz__result .score{ font-family: var(--font-display); font-size: 3rem; color: var(--cyan-soft); }

/* ============ RESULTS ============ */
.results-grid{ display:grid; grid-template-columns: repeat(3,1fr); gap: 1rem; }
.result-item{ background: var(--panel); border:1px solid var(--border); border-radius: var(--radius); padding: 1.4rem; }
.result-item h4{ font-size: .95rem; color: var(--cyan-soft); margin-bottom:.4em; }
.result-item p{ font-size: .85rem; margin:0; }

/* ============ OUTRO ============ */
.outro{ max-width: 900px; }
.outro__grid{ display:grid; grid-template-columns: repeat(3,1fr); gap: 1rem; margin: 2.5rem 0; text-align:left; }
.outro__card{ background: var(--panel); border:1px solid var(--border); border-radius: var(--radius); padding: 1.4rem; }
.outro__card h3{ font-size: .95rem; color: var(--cyan-soft); }
.outro__card p{ font-size: .85rem; margin:0; }
.outro__cta{ display:flex; gap:1rem; justify-content:center; flex-wrap:wrap; }

/* ============ FOOTER ============ */
.footer{ text-align:center; padding: 3rem 20px; color: var(--text-faint); font-size: .8rem; border-top:1px solid var(--border); }

/* ============ LIGHTBOX ============ */
.lightbox{
  position: fixed; inset:0; background: rgba(2,4,9,.92); backdrop-filter: blur(6px);
  display:none; align-items:center; justify-content:center; flex-direction:column; z-index: 1000; padding: 5vh 5vw;
}
.lightbox.open{ display:flex; }
.lightbox img{ max-width: 90vw; max-height: 78vh; border-radius: 12px; border:1px solid var(--border-hi); }
.lightbox__caption{ color: var(--text-dim); margin-top: 1rem; font-size: .9rem; }
.lightbox__close{
  position:absolute; top: 24px; right: 28px; background:none; border:none; color: var(--text); font-size: 2rem; line-height:1;
}

/* ============ RESPONSIVE ============ */
@media (max-width: 980px){
  .flow{ grid-template-columns: repeat(2,1fr); }
  .cards{ grid-template-columns: repeat(2,1fr); }
  .waarom{ grid-template-columns: 1fr; }
  .safety-grid{ grid-template-columns: repeat(2,1fr); }
  .results-grid{ grid-template-columns: repeat(2,1fr); }
  .outro__grid{ grid-template-columns: 1fr; }
  .tab-panel.active{ grid-template-columns: 1fr; }
  .journey__nodes{ position:static; flex-wrap:wrap; margin-top: 1rem; }
  .journey__line{ display:none; }
}
@media (max-width: 720px){
  .nav__links{
    position:absolute; top: 100%; left:0; right:0; flex-direction:column; background: rgba(5,7,13,.97);
    padding: 1.5rem; gap: 1rem; border-bottom: 1px solid var(--border); display:none;
  }
  .nav__links.open{ display:flex; }
  .nav__toggle{ display:flex; }
  .flow{ grid-template-columns: 1fr 1fr; }
  .cards{ grid-template-columns: 1fr; }
  .safety-grid{ grid-template-columns: 1fr; }
  .results-grid{ grid-template-columns: 1fr; }
  .micro-grid{ grid-template-columns: 1fr; }
  .section{ padding: 80px 18px; }
}