/* ==========================================================================
   MARINE SHIELD — design tokens
   ========================================================================== */

:root{
  /* colour */
  --abyss:        #051726;   /* deepest background */
  --deep:         #0A2A3E;   /* panel background */
  --ocean:        #123B54;   /* mid panel / borders */
  --pulse:        #3FD8E0;   /* ultrasonic signal cyan — the accent */
  --pulse-dim:    #1F6E77;
  --coral:        #FF7A47;   /* action / warm accent, from the reef fish */
  --coral-dim:    #C85A32;
  --foam:         #EAF6F6;   /* primary light text */
  --foam-dim:     #9FBAC4;   /* secondary light text */
  --line:         rgba(63,216,224,0.18);

  /* type */
  --display: "Space Grotesk", "Segoe UI", sans-serif;
  --body:    "IBM Plex Sans", "Segoe UI", sans-serif;
  --mono:    "IBM Plex Mono", "Courier New", monospace;

  --step:    8px;
}

*{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; }
body{
  background:var(--abyss);
  color:var(--foam);
  font-family:var(--body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  position:relative;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:url("images/hero-underwater.png");
  background-position:center center;
  background-repeat:no-repeat;
  background-size:1600px auto;
  opacity:0.05;
  filter:grayscale(0.25) contrast(1.05);
  z-index:0;
  pointer-events:none;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ list-style:none; }

.wrap{
  max-width:1180px;
  margin:0 auto;
  padding:0 32px;
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; scroll-behavior:auto !important; }
}

/* ---------- eyebrow / labels ---------- */
.eyebrow{
  font-family:var(--mono);
  font-size:12.5px;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--pulse);
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:18px;
}
.eyebrow::before{
  content:"";
  width:7px; height:7px;
  border-radius:50%;
  background:var(--pulse);
  box-shadow:0 0 0 0 rgba(63,216,224,0.6);
  animation:ping 2.2s ease-out infinite;
}
@keyframes ping{
  0%{ box-shadow:0 0 0 0 rgba(63,216,224,0.55); }
  70%{ box-shadow:0 0 0 9px rgba(63,216,224,0); }
  100%{ box-shadow:0 0 0 0 rgba(63,216,224,0); }
}

/* ---------- headings ---------- */
h1,h2,h3{ font-family:var(--display); font-weight:600; letter-spacing:-0.01em; color:var(--foam); }
h1{ font-size:clamp(40px,6vw,74px); line-height:1.03; }
h2{ font-size:clamp(28px,3.4vw,42px); line-height:1.12; }
h3{ font-size:20px; line-height:1.3; }
p{ color:var(--foam-dim); }
.lede{ font-size:19px; line-height:1.65; max-width:52ch; }

/* ---------- nav ---------- */
header.site{
  position:sticky; top:0; z-index:50;
  background:rgba(5,23,38,0.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.navbar{
  position:relative;
  display:flex; align-items:center; justify-content:space-between;
  padding:20px 32px;
  max-width:1180px; margin:0 auto;
}
.brand{
  display:flex; align-items:center; gap:10px;
  font-family:var(--display); font-weight:600; font-size:18px; letter-spacing:0.01em;
}
.brand .mark{ width:26px; height:26px; }
.navlinks{ display:flex; gap:36px; font-size:14.5px; }
.navlinks a{
  color:var(--foam-dim);
  position:relative;
  padding:4px 0;
  transition:color .2s ease;
}
.navlinks a:hover, .navlinks a.active{ color:var(--foam); }
.navlinks a.active::after{
  content:""; position:absolute; left:0; right:0; bottom:-6px; height:2px;
  background:var(--pulse);
}
.nav-cta{
  border:1px solid var(--pulse-dim);
  color:var(--pulse);
  padding:9px 18px;
  border-radius:100px;
  font-size:13.5px;
  font-family:var(--mono);
  letter-spacing:0.03em;
  transition:background .2s ease, color .2s ease, border-color .2s ease;
}
.nav-cta:hover{ background:var(--pulse); color:var(--abyss); border-color:var(--pulse); }
.nav-cta-mobile{ display:none; }
.burger{
  display:none;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  gap:5px;
  width:38px; height:38px;
  background:transparent;
  border:1px solid var(--pulse-dim);
  border-radius:8px;
  cursor:pointer;
  padding:0;
  flex-shrink:0;
}
.burger span{
  display:block;
  width:18px; height:2px;
  background:var(--pulse);
  transition:transform .25s ease, opacity .2s ease;
}
.burger.is-open span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
.burger.is-open span:nth-child(2){ opacity:0; }
.burger.is-open span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:10px;
  padding:14px 26px;
  border-radius:100px;
  font-family:var(--mono);
  font-size:14px;
  letter-spacing:0.02em;
  cursor:pointer;
  border:1px solid transparent;
  transition:transform .2s ease, background .2s ease, border-color .2s ease, color .2s ease;
}
.btn:hover{ transform:translateY(-1px); }
.btn-primary{ background:var(--coral); color:#12100C; }
.btn-primary:hover{ background:#ff8c5f; }
.btn-ghost{ border-color:var(--line); color:var(--foam); }
.btn-ghost:hover{ border-color:var(--pulse-dim); color:var(--pulse); }

/* ---------- hero (home) ---------- */
.hero{
  position:relative;
  min-height:92vh;
  display:flex; align-items:flex-end;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.hero-media{
  position:absolute; inset:0;
  background:url("images/hero-underwater.png") center 30%/cover no-repeat;
}
.hero-media::after{
  content:"";
  position:absolute; inset:0;
  background:
    linear-gradient(180deg, rgba(5,15,25,0.25) 0%, rgba(5,17,26,0.35) 45%, rgba(5,17,26,0.94) 100%),
    linear-gradient(90deg, rgba(5,17,26,0.55) 0%, rgba(5,17,26,0.05) 45%);
}
.hero-inner{
  position:relative; z-index:2;
  width:100%;
  padding:0 32px 88px;
  max-width:1180px; margin:0 auto;
}
.hero h1{ max-width:15ch; }
.hero .lede{ margin-top:22px; color:var(--foam-dim); }
.hero-cta{ margin-top:38px; display:flex; gap:16px; flex-wrap:wrap; }
.hero-stats{
  margin-top:64px;
  display:grid; grid-template-columns:repeat(3,auto); gap:48px;
  font-family:var(--mono);
}
.hero-stats div span{ display:block; }
.hero-stats .num{ font-size:26px; color:var(--pulse); }
.hero-stats .lab{ font-size:12px; color:var(--foam-dim); letter-spacing:0.06em; text-transform:uppercase; margin-top:4px; }

/* sonar rings, used on hero + product visual */
.sonar{ position:absolute; z-index:2; }
.sonar svg{ width:100%; height:100%; overflow:visible; }
.ring{
  fill:none; stroke:var(--pulse); stroke-width:1.4; opacity:0;
  transform-origin:center;
  animation:sonar-pulse 3.6s ease-out infinite;
}
.ring.r2{ animation-delay:1.2s; }
.ring.r3{ animation-delay:2.4s; }
@keyframes sonar-pulse{
  0%{ transform:scale(0.35); opacity:0; }
  12%{ opacity:.85; }
  100%{ transform:scale(1); opacity:0; }
}

/* ---------- sections (generic) ---------- */
section{ padding:110px 0; border-bottom:1px solid var(--line); }
section.tight{ padding:78px 0; }
.section-head{ max-width:640px; margin-bottom:64px; }
.section-head.center{ margin-left:auto; margin-right:auto; text-align:center; }

/* two-col */
.split{ display:grid; grid-template-columns:1fr 1fr; gap:72px; align-items:center; }

/* ---------- how it works — waveform steps ---------- */
.freq-band{
  font-family:var(--mono); font-size:13px; color:var(--pulse);
  border:1px solid var(--pulse-dim);
  border-radius:100px;
  padding:6px 14px;
  display:inline-block;
  margin-bottom:20px;
}
.steps{ display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--line); border:1px solid var(--line); border-radius:14px; overflow:hidden; }
.step{ background:var(--deep); padding:32px 26px; position:relative; }
.step .idx{ font-family:var(--mono); font-size:12px; color:var(--pulse); letter-spacing:0.1em; }
.step h3{ margin-top:16px; }
.step p{ margin-top:10px; font-size:14.5px; }

/* ---------- benefit / comparison cards ---------- */
.cards{ display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.card{
  background:var(--deep);
  border:1px solid var(--line);
  border-radius:16px;
  padding:32px;
  transition:border-color .2s ease, transform .2s ease;
}
.card:hover{ border-color:var(--pulse-dim); transform:translateY(-3px); }
.card .icon{ width:38px; height:38px; margin-bottom:20px; color:var(--pulse); }
.card p{ margin-top:10px; font-size:14.5px; }

/* comparison table */
.compare{ border:1px solid var(--line); border-radius:16px; overflow:hidden; }
.compare table{ width:100%; border-collapse:collapse; }
.compare th, .compare td{ padding:18px 24px; text-align:left; font-size:14.5px; border-bottom:1px solid var(--line); }
.compare th{ font-family:var(--mono); text-transform:uppercase; letter-spacing:.06em; font-size:12px; color:var(--foam-dim); background:var(--deep); }
.compare td:first-child{ color:var(--foam); font-family:var(--body); font-weight:500; }
.compare tr:last-child td{ border-bottom:none; }
.compare .yes{ color:var(--pulse); }
.compare .no{ color:var(--foam-dim); }
.compare tbody tr:nth-child(odd){ background:rgba(63,216,224,0.03); }

/* ---------- quote / stat strip ---------- */
.stripe{
  background:var(--deep);
  border-top:1px solid var(--line); border-bottom:1px solid var(--line);
}
.stripe .wrap{ display:grid; grid-template-columns:repeat(4,1fr); gap:32px; padding:56px 32px; }
.stripe .num{ font-family:var(--display); font-size:36px; color:var(--pulse); }
.stripe .lab{ margin-top:6px; font-size:13.5px; color:var(--foam-dim); }

/* ---------- timeline (sustainability page) ---------- */
.timeline{ position:relative; padding-left:36px; }
.timeline::before{ content:""; position:absolute; left:6px; top:6px; bottom:6px; width:1px; background:var(--line); }
.tl-item{ position:relative; padding-bottom:52px; }
.tl-item:last-child{ padding-bottom:0; }
.tl-item::before{
  content:""; position:absolute; left:-36px; top:4px; width:13px; height:13px; border-radius:50%;
  background:var(--abyss); border:2px solid var(--pulse);
}
.tl-item h3{ margin-bottom:8px; }
.tl-item p{ max-width:60ch; font-size:14.5px; }

/* ---------- CTA band ---------- */
.cta-band{
  background:linear-gradient(120deg, var(--deep), var(--ocean));
  border-radius:20px;
  padding:64px;
  display:flex; align-items:center; justify-content:space-between; gap:32px;
  flex-wrap:wrap;
}
.cta-band h2{ max-width:20ch; }

/* ---------- form (handel page) ---------- */
.form-panel{
  background:var(--deep); border:1px solid var(--line); border-radius:18px;
  padding:40px;
}
.field{ margin-bottom:20px; }
.field label{ display:block; font-family:var(--mono); font-size:12.5px; color:var(--foam-dim); letter-spacing:.04em; text-transform:uppercase; margin-bottom:8px; }
.field input, .field select, .field textarea{
  width:100%;
  background:var(--abyss);
  border:1px solid var(--line);
  border-radius:8px;
  padding:12px 14px;
  color:var(--foam);
  font-family:var(--body);
  font-size:14.5px;
  outline:none;
  transition:border-color .2s ease;
}
.field input:focus, .field select:focus, .field textarea:focus{ border-color:var(--pulse); }
.field textarea{ resize:vertical; min-height:100px; }
.field-row{ display:grid; grid-template-columns:1fr 1fr; gap:16px; }

/* tier cards (handel) */
.tiers{ display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.tier{ border:1px solid var(--line); border-radius:16px; padding:32px; background:var(--deep); }
.tier.featured{ border-color:var(--pulse); position:relative; }
.tier.featured::before{
  content:"Meest gekozen"; position:absolute; top:-13px; left:32px;
  background:var(--pulse); color:var(--abyss); font-family:var(--mono); font-size:11px;
  letter-spacing:.05em; padding:4px 12px; border-radius:100px; text-transform:uppercase;
}
.tier h3{ margin-bottom:6px; }
.tier .desc{ font-size:13.5px; margin-bottom:22px; }
.tier ul{ margin-top:22px; display:flex; flex-direction:column; gap:10px; }
.tier li{ font-size:14px; color:var(--foam-dim); display:flex; gap:10px; align-items:flex-start; }
.tier li::before{ content:"—"; color:var(--pulse); flex-shrink:0; }

/* ---------- page hero (sub pages, no big photo) ---------- */
.page-hero{
  padding:170px 0 90px;
  position:relative;
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(ellipse 900px 500px at 15% 0%, rgba(63,216,224,0.10), transparent 60%),
    var(--abyss);
}
.page-hero .lede{ margin-top:20px; }

/* ---------- footer ---------- */
footer{ padding:70px 0 40px; }
.footer-top{ display:flex; justify-content:space-between; gap:48px; flex-wrap:wrap; padding-bottom:48px; border-bottom:1px solid var(--line); margin-bottom:32px; }
.footer-cols{ display:flex; gap:64px; flex-wrap:wrap; }
.footer-col h4{ font-family:var(--mono); font-size:12px; letter-spacing:.08em; text-transform:uppercase; color:var(--foam-dim); margin-bottom:16px; }
.footer-col a, .footer-col p{ display:block; font-size:14px; color:var(--foam-dim); margin-bottom:10px; }
.footer-col a:hover{ color:var(--pulse); }
.footer-bottom{ display:flex; justify-content:space-between; align-items:center; font-size:13px; color:var(--foam-dim); flex-wrap:wrap; gap:12px; }

/* ---------- scroll reveal ---------- */
[data-reveal]{ opacity:0; transform:translateY(18px); transition:opacity .7s ease, transform .7s ease; }
[data-reveal].is-visible{ opacity:1; transform:translateY(0); }

/* ---------- responsive ---------- */
@media (max-width:900px){
  .burger{ display:flex; }
  .navlinks{
    display:flex;
    flex-direction:column;
    gap:0;
    position:absolute;
    top:100%; left:0; right:0;
    margin:0 20px;
    background:var(--deep);
    border:1px solid var(--line);
    border-radius:14px;
    padding:6px 20px;
    max-height:0;
    overflow:hidden;
    opacity:0;
    pointer-events:none;
    box-shadow:0 16px 32px rgba(0,0,0,0.35);
    transition:max-height .3s ease, opacity .25s ease;
  }
  .navlinks.is-open{
    max-height:280px;
    opacity:1;
    pointer-events:auto;
  }
  .navlinks a{
    padding:16px 4px;
    border-bottom:1px solid var(--line);
    font-size:16px;
  }
  .navlinks a:last-child{ border-bottom:none; }
  .navlinks a.active::after{ display:none; }
  .nav-cta-mobile{
    display:flex;
    justify-content:center;
    align-items:center;
    margin:12px 0 16px;
    padding:12px 18px;
    border-radius:100px;
    background:var(--coral);
    color:#12100C;
    font-family:var(--mono);
    font-size:13.5px;
    letter-spacing:0.02em;
  }
  .split{ grid-template-columns:1fr; }
  .steps{ grid-template-columns:1fr 1fr; }
  .cards{ grid-template-columns:1fr; }
  .stripe .wrap{ grid-template-columns:1fr 1fr; }
  .tiers{ grid-template-columns:1fr; }
  .field-row{ grid-template-columns:1fr; }
  .cta-band{ flex-direction:column; align-items:flex-start; }
  .hero-stats{ grid-template-columns:1fr 1fr; }
}
@media (max-width:560px){
  .steps{ grid-template-columns:1fr; }
  .stripe .wrap{ grid-template-columns:1fr; }
  .wrap{ padding:0 20px; }
  .navbar{ padding:16px 20px; }
  section{ padding:70px 0; }
  .cta-band{ padding:36px; }
}
@media (max-width:420px){
  .nav-cta{ display:none; }
}