/* BVH Klimaat — huisstijl website */
:root{
  --navy:#0B1D34; --blue:#0095D9; --light:#66C2E6; --grey:#6B7278;
  --bg:#F7F8FA; --line:#E4E7EC; --white:#fff;
  --radius:14px; --shadow:0 8px 30px rgba(11,29,52,.08);
  --maxw:1120px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Montserrat',Arial,sans-serif;color:var(--navy);background:var(--white);line-height:1.65;font-size:16px}
img,svg{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.section{padding:72px 0}
.section.alt{background:var(--bg)}
h1,h2,h3{line-height:1.2;font-weight:800}
h1{font-size:clamp(1.9rem,5.5vw,3.2rem)}
h2{font-size:clamp(1.5rem,3.6vw,2.2rem)}
h3{font-size:1.08rem}
.kicker{color:var(--blue);font-weight:700;letter-spacing:.14em;text-transform:uppercase;font-size:.8rem;margin-bottom:10px}
.lead{color:var(--grey);font-size:1.05rem;max-width:640px;margin-top:14px}
.center{text-align:center}
.center .lead{margin-left:auto;margin-right:auto}

/* knoppen */
.btn{display:inline-block;padding:14px 26px;border-radius:999px;font-weight:700;font-size:.95rem;transition:.2s;border:2px solid transparent}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:#007fb8}
.btn-ghost{border-color:rgba(255,255,255,.45);color:#fff}
.btn-ghost:hover{border-color:#fff}
.btn-outline{border-color:var(--blue);color:var(--blue)}
.btn-outline:hover{background:var(--blue);color:#fff}
.btn-wa{background:#25D366;color:#fff}
.btn-wa:hover{background:#1fb457}
.btn-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}

/* header */
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.nav .logo img{height:54px;width:auto;display:block}
.nav ul{display:flex;gap:20px;list-style:none;align-items:center;flex-wrap:nowrap}
.nav ul a{color:var(--navy);font-weight:600;font-size:.9rem;white-space:nowrap;display:inline-flex;align-items:center;line-height:1}
.nav ul a:hover,.nav ul a.actief{color:var(--blue)}
.nav .btn{padding:10px 18px;font-size:.84rem;line-height:1}
.hamburger{display:none;background:none;border:0;cursor:pointer;padding:8px}
.hamburger span{display:block;width:24px;height:2.5px;background:var(--navy);margin:5px 0;border-radius:2px;transition:.25s}

/* hero */
.hero{background:linear-gradient(135deg,#0B1D34 0%,#12304f 55%,#0d4d75 100%);color:#fff;position:relative;overflow:hidden}
.hero .container{position:relative;z-index:2;padding-top:96px;padding-bottom:96px}
.hero .swoosh{position:absolute;right:-140px;bottom:-190px;width:640px;opacity:.14;z-index:1}
.hero p.lead{color:#c6d3e2}
.hero .kicker{color:var(--light)}

/* usp bar */
.uspbar{background:var(--navy);color:#fff}
.uspbar .container{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding-top:18px;padding-bottom:18px}
.usp{display:flex;align-items:center;gap:10px;font-size:.82rem;font-weight:600;justify-content:center}
.usp svg{flex:none}

/* kaarten */
.grid{display:grid;gap:22px;margin-top:40px}
.grid.c4{grid-template-columns:repeat(4,1fr)}
.grid.c3{grid-template-columns:repeat(3,1fr)}
.grid.c2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);transition:.2s}
a.card{color:var(--navy)}
a.card:hover{transform:translateY(-4px);border-color:var(--light)}
.card .icon{width:52px;height:52px;border-radius:12px;background:#E9F6FD;display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.card h3{margin-bottom:8px}
.card p{color:var(--grey);font-size:.92rem}
.card .meer{display:inline-block;margin-top:14px;font-weight:700;font-size:.88rem;color:var(--blue)}

/* stappen */
.stap{position:relative;padding-left:0}
.stap .nr{font-size:2.4rem;font-weight:800;color:var(--light);line-height:1}
.stap h3{margin:10px 0 6px}
.stap p{color:var(--grey);font-size:.92rem}

/* reviews */
.review{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.review .sterren{color:#F5A623;letter-spacing:2px;margin-bottom:10px}
.review p{font-size:.95rem}
.review .wie{margin-top:14px;font-weight:700;font-size:.85rem}
.review .wie span{color:var(--grey);font-weight:400}

/* faq */
.faq{max-width:760px;margin:36px auto 0}
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden}
.faq summary{padding:18px 22px;font-weight:700;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;font-size:.98rem}
.faq summary::after{content:'+';color:var(--blue);font-size:1.4rem;font-weight:700}
.faq details[open] summary::after{content:'\2013'}
.faq .faq-a{padding:0 22px 18px;color:var(--grey);font-size:.94rem}

/* cta band */
.ctaband{background:linear-gradient(135deg,#0B1D34,#0d4d75);color:#fff;border-radius:20px;padding:52px 40px;display:flex;justify-content:space-between;align-items:center;gap:30px;flex-wrap:wrap}
.ctaband h2{color:#fff}
.ctaband p{color:#c6d3e2;margin-top:8px}

/* page hero (subpaginas) */
.pagehero{background:linear-gradient(135deg,#0B1D34,#12304f);color:#fff;padding:72px 0 64px}
.pagehero .lead{color:#c6d3e2}
.crumb{font-size:.8rem;color:var(--light);margin-bottom:14px;font-weight:600}
.crumb a{color:var(--light)}

/* inhoud subpagina */
.split{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:start}
.checklist{list-style:none;margin-top:18px}
.checklist li{padding:9px 0 9px 34px;position:relative;font-size:.97rem}
.checklist li::before{content:'';position:absolute;left:0;top:13px;width:20px;height:20px;border-radius:50%;
  background:var(--blue) url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="white" stroke-width="3.4" stroke-linecap="round" stroke-linejoin="round"><polyline points="20 6 9 17 4 12"/></svg>') center/12px no-repeat}
.infoblok{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.infoblok h3{margin-bottom:12px}
.prijs{font-size:1.7rem;font-weight:800;color:var(--blue)}
.prijs small{font-size:.85rem;color:var(--grey);font-weight:600}
.merken{display:flex;gap:12px;flex-wrap:wrap;margin-top:16px}
.merken span{border:1px solid var(--line);border-radius:999px;padding:7px 16px;font-size:.82rem;font-weight:600;color:var(--grey);background:#fff}

/* formulier */
form .veld{margin-bottom:18px}
label{display:block;font-weight:700;font-size:.88rem;margin-bottom:7px}
input,select,textarea{width:100%;padding:13px 16px;border:1.5px solid var(--line);border-radius:10px;font:inherit;font-size:.95rem;background:#fff;color:var(--navy)}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--blue)}
.form-rij{display:grid;grid-template-columns:1fr 1fr;gap:16px}

/* footer */
footer{background:var(--navy);color:#B9C4D2;padding:60px 0 30px;font-size:.9rem}
footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px}
footer img{height:52px;width:auto;margin-bottom:16px}
footer h4{color:#fff;font-size:.95rem;margin-bottom:14px}
footer ul{list-style:none}
footer ul li{margin-bottom:9px}
footer a{color:#B9C4D2}
footer a:hover{color:#fff}
.footnote{border-top:1px solid rgba(255,255,255,.12);margin-top:44px;padding-top:22px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:.8rem;color:#7f8ea1}

/* mobiel */
@media (max-width:900px){
  .grid.c4,.grid.c3{grid-template-columns:1fr 1fr}
  .split{grid-template-columns:1fr;gap:32px}
  .uspbar .container{grid-template-columns:1fr 1fr;gap:14px}
  .usp{justify-content:flex-start}
  footer .cols{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .section{padding:52px 0}
  .grid.c4,.grid.c3,.grid.c2,.form-rij{grid-template-columns:1fr}
  .nav ul{position:fixed;inset:74px 0 auto 0;background:#fff;flex-direction:column;gap:0;padding:10px 22px 24px;border-bottom:1px solid var(--line);display:none}
  .nav ul.open{display:flex}
  .nav ul li{width:100%;padding:12px 0;border-bottom:1px solid var(--line)}
  .nav ul li:last-child{border:none;padding-top:18px}
  .hamburger{display:block}
  .ctaband{padding:36px 26px}
}

/* donkere sectie (utiliteit) */
.section.dark{background:var(--navy);color:#fff}
.section.dark h2{color:#fff}
.section.dark .lead{color:#c6d3e2}
.section.dark .checklist li{color:#dbe4ee}
.section.dark .infoblok{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.14)}
.section.dark .infoblok h3{color:#fff}
.section.dark .infoblok p{color:#b9c4d2}

/* submenu diensten */
.nav li.sub{position:relative}
.nav li.sub>a::after{content:''}
.nav .submenu{display:none;position:absolute;top:100%;left:-16px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);padding:8px 0;min-width:230px;list-style:none}
.nav li.sub:hover .submenu,.nav li.sub:focus-within .submenu{display:block}
.nav .submenu li{width:100%}
.nav .submenu a{display:block;padding:10px 20px;font-size:.9rem}
.btn-klein{padding:9px 18px;font-size:.85rem}

/* project/vacature tags */
.projtag{display:inline-block;background:#E9F6FD;color:var(--blue);font-weight:700;font-size:.75rem;letter-spacing:.06em;text-transform:uppercase;padding:5px 12px;border-radius:999px}

@media (max-width:640px){
  .nav .submenu{display:block;position:static;border:0;box-shadow:none;padding:2px 0 0 16px;min-width:0}
  .nav li.sub>a::after{content:''}
  .nav .submenu a{padding:8px 0;color:var(--grey)}
}

/* ===== nette navigatie (herbouwd) ===== */
.nav-tel{color:var(--blue);font-weight:700;white-space:nowrap;display:inline-flex;align-items:center;gap:6px}
.nav-tel:hover{color:#007fb8}
.nav-tel svg{flex:0 0 auto}

/* tablet en smaller: hamburgermenu, zodat niets ooit scheef staat */
@media (max-width:1023px){
  .nav ul{position:fixed;inset:74px 0 auto 0;background:#fff;flex-direction:column;gap:0;padding:10px 22px 24px;border-bottom:1px solid var(--line);display:none;align-items:flex-start}
  .nav ul.open{display:flex}
  .nav ul li{width:100%;padding:12px 0;border-bottom:1px solid var(--line)}
  .nav ul li:last-child{border:none;padding-top:18px}
  .hamburger{display:block}
  .nav .submenu{display:block;position:static;border:0;box-shadow:none;padding:2px 0 0 16px;min-width:0}
  .nav li.sub>a::after{content:''}
  .nav .submenu a{padding:8px 0;color:var(--grey)}
}

.btn-storing{border-color:#E4572E;color:#E4572E}
.btn-storing:hover{background:#E4572E;border-color:#E4572E;color:#fff}