/* =========================================================================
   Evergroen.nl — design system
   Onafhankelijke verduurzamingsgids (zon, accu, warmtepomp, laadpaal)
   Rebrand op basis van de tibberkorting-werkwijze, eigen groen palet.
   ========================================================================= */

/* ----- Design tokens ---------------------------------------------------- */
:root {
  /* Merkkleuren */
  --green-900: #0e3b24;   /* diepgroen basis/donker */
  --green-800: #14532d;
  --green-600: #1c7d45;
  --green-500: #2fb457;   /* fris accent */
  --green-400: #36c46a;
  --green-100: #e3f1e7;
  --paper:     #f3f7f2;   /* zacht/licht */
  --white:     #ffffff;

  /* Tekst */
  --ink:       #13241c;
  --ink-soft:  #46594f;
  --ink-faint: #6f8278;

  /* Functioneel */
  --warn:      #e08a2e;   /* "let op" */
  --warn-bg:   #fdf3e6;
  --border:    #dfe7e0;
  --shadow:    0 1px 2px rgba(14,59,36,.06), 0 8px 24px rgba(14,59,36,.06);
  --shadow-lg: 0 12px 40px rgba(14,59,36,.12);

  /* Maatvoering */
  --maxw: 1120px;
  --radius: 16px;
  --radius-sm: 10px;

  /* Fonts */
  --font-text: "Hanken Grotesk", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
}

/* ----- Reset ------------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-text);
  color: var(--ink);
  background: var(--white);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--green-600); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.15; color: var(--ink); font-weight: 600; }
h1 { font-size: clamp(2rem, 5vw, 3.1rem); letter-spacing: -.01em; }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.2rem); }
h3 { font-size: 1.25rem; }
p  { margin: 0 0 1rem; }

/* ----- Layout helpers --------------------------------------------------- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.section { padding: 64px 0; }
.section--tight { padding: 40px 0; }
.section--paper { background: var(--paper); }
.eyebrow {
  display: inline-block; font-weight: 700; font-size: .8rem; letter-spacing: .08em;
  text-transform: uppercase; color: var(--green-600); margin-bottom: .5rem;
}
.lead { font-size: 1.15rem; color: var(--ink-soft); max-width: 60ch; }
.text-center { text-align: center; }
.muted { color: var(--ink-soft); }

/* ----- Buttons ---------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: .5rem; cursor: pointer;
  font-family: var(--font-text); font-weight: 700; font-size: 1rem;
  padding: .8rem 1.4rem; border-radius: 999px; border: 1px solid transparent;
  transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn--primary { background: var(--green-500); color: #04220f; box-shadow: var(--shadow); }
.btn--primary:hover { background: var(--green-400); }
.btn--ghost { background: transparent; color: var(--green-800); border-color: var(--border); }
.btn--ghost:hover { background: var(--green-100); }
.btn--light { background: var(--white); color: var(--green-800); }

/* ----- Header / nav ----------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.9); backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: .55rem; font-family: var(--font-display);
  font-weight: 600; font-size: 1.4rem; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand b { color: var(--green-600); font-weight: 700; }
.brand-mark { width: 30px; height: 30px; flex: 0 0 auto; }
.nav-links { display: flex; align-items: center; gap: 1.4rem; list-style: none; margin: 0; padding: 0; }
.nav-links a { color: var(--ink-soft); font-weight: 600; font-size: .98rem; }
.nav-links a:hover { color: var(--green-700); text-decoration: none; }
.nav-cta { margin-left: .5rem; }
.nav-toggle {
  display: none; background: none; border: 1px solid var(--border); border-radius: 10px;
  width: 44px; height: 40px; cursor: pointer; align-items: center; justify-content: center;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; display: block; width: 20px; height: 2px; background: var(--ink); position: relative;
}
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after  { position: absolute; top: 6px; }

@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: absolute; top: 68px; left: 0; right: 0; flex-direction: column;
    align-items: stretch; gap: 0; background: var(--white); border-bottom: 1px solid var(--border);
    padding: .5rem 20px 1rem; box-shadow: var(--shadow-lg); display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links li { padding: .25rem 0; }
  .nav-links a { display: block; padding: .6rem 0; }
  .nav-cta { margin: .5rem 0 0; }
}

/* ----- Hero ------------------------------------------------------------- */
.hero { background:
    radial-gradient(1200px 500px at 80% -10%, var(--green-100), transparent),
    linear-gradient(180deg, var(--paper), var(--white)); padding: 72px 0 56px; }
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; }
.hero h1 { margin: .2rem 0 1rem; }
.hero .lead { margin-bottom: 1.6rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; }
.hero-art { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow-lg); padding: 22px; }
@media (max-width: 860px) { .hero-grid { grid-template-columns: 1fr; gap: 28px; } }

/* ----- Cards / grids ---------------------------------------------------- */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 980px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.card {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow); transition: transform .14s ease, box-shadow .14s ease;
  display: flex; flex-direction: column;
}
a.card:hover { text-decoration: none; transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.card h3 { margin: .2rem 0 .5rem; }
.card p { color: var(--ink-soft); margin-bottom: 1rem; }
.card .card-link { margin-top: auto; font-weight: 700; color: var(--green-600); }
.card-icon {
  width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center;
  background: var(--green-100); color: var(--green-700); margin-bottom: 14px;
}
.card-icon svg { width: 26px; height: 26px; }

/* Pillar card accent */
.pillar { position: relative; overflow: hidden; }
.pillar::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 4px;
  background: linear-gradient(90deg, var(--green-500), var(--green-400)); }

/* ----- Callouts --------------------------------------------------------- */
.callout { border: 1px solid var(--border); border-left: 4px solid var(--green-500);
  background: var(--green-100); border-radius: var(--radius-sm); padding: 16px 18px; margin: 1.5rem 0; }
.callout--warn { border-left-color: var(--warn); background: var(--warn-bg); }
.callout p:last-child { margin-bottom: 0; }
.callout strong { color: var(--ink); }

/* ----- Disclosure (affiliate) ------------------------------------------ */
.disclosure { font-size: .9rem; color: var(--ink-soft); background: var(--paper);
  border: 1px dashed var(--border); border-radius: var(--radius-sm); padding: 12px 16px; margin: 1.2rem 0; }

/* ----- Article (prose) -------------------------------------------------- */
.prose { max-width: 760px; margin: 0 auto; }
.prose h2 { margin: 2.2rem 0 .8rem; }
.prose h3 { margin: 1.6rem 0 .5rem; }
.prose ul, .prose ol { padding-left: 1.3rem; margin: 0 0 1.2rem; }
.prose li { margin: .35rem 0; }
.prose table { width: 100%; border-collapse: collapse; margin: 1.4rem 0; font-size: .96rem; }
.prose th, .prose td { text-align: left; padding: .7rem .8rem; border-bottom: 1px solid var(--border); }
.prose th { background: var(--paper); font-weight: 700; }
.prose blockquote { margin: 1.4rem 0; padding: .6rem 1.2rem; border-left: 4px solid var(--green-400);
  color: var(--ink-soft); font-style: italic; }

/* ----- Breadcrumb ------------------------------------------------------- */
.breadcrumb { font-size: .88rem; color: var(--ink-soft); padding: 18px 0 0; }
.breadcrumb a { color: var(--ink-soft); }
.breadcrumb span { color: var(--ink-faint); padding: 0 .4rem; }

/* ----- FAQ -------------------------------------------------------------- */
.faq details { border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 4px 18px; margin: .7rem 0; background: var(--white); }
.faq summary { cursor: pointer; font-weight: 700; padding: 12px 0; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; float: right; color: var(--green-600); font-weight: 700; }
.faq details[open] summary::after { content: "–"; }
.faq details[open] summary { border-bottom: 1px solid var(--border); }
.faq details p { padding: 12px 0; color: var(--ink-soft); }

/* ----- Footer ----------------------------------------------------------- */
.site-footer { background: var(--green-900); color: #cfe3d6; padding: 56px 0 28px; margin-top: 40px; }
.site-footer a { color: #cfe3d6; }
.site-footer a:hover { color: var(--white); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
.footer-brand .brand { color: var(--white); }
.footer-brand .brand b { color: var(--green-400); }
.footer-brand p { color: #a9c6b4; max-width: 32ch; margin-top: .8rem; }
.footer-col h4 { color: var(--white); font-family: var(--font-text); font-size: .95rem;
  text-transform: uppercase; letter-spacing: .06em; margin: 0 0 .8rem; }
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin: .45rem 0; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 36px; padding-top: 20px;
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: .88rem; color: #9bbaa7; }
@media (max-width: 820px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }

/* ----- Cookie consent banner ------------------------------------------- */
.cookie-banner {
  position: fixed; left: 16px; right: 16px; bottom: 16px; z-index: 100;
  max-width: 720px; margin: 0 auto; background: var(--white); color: var(--ink);
  border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow-lg);
  padding: 20px 22px; display: none;
}
.cookie-banner.show { display: block; }
.cookie-banner h3 { font-size: 1.15rem; margin: 0 0 .4rem; }
.cookie-banner p { font-size: .94rem; color: var(--ink-soft); margin: 0 0 1rem; }
.cookie-actions { display: flex; flex-wrap: wrap; gap: .6rem; }
.cookie-actions .btn { font-size: .92rem; padding: .6rem 1.1rem; }

/* ----- Calculator ------------------------------------------------------- */
.calc { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; margin: 1.8rem 0; }
@media (max-width: 760px) { .calc { grid-template-columns: 1fr; } }

.calc-form, .calc-result {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 22px 24px;
}
.calc-result { background: var(--paper); position: sticky; top: 84px; }
.calc-field { margin: 0 0 1.1rem; }
.calc-field:last-child { margin-bottom: 0; }
.calc-field label { display: block; font-weight: 700; font-size: .95rem; margin-bottom: .35rem; }
.calc-field .hint { display: block; font-weight: 400; font-size: .82rem; color: var(--ink-faint); margin-top: .2rem; }
.calc-input { position: relative; display: flex; align-items: center; }
.calc-input .unit { position: absolute; right: 14px; color: var(--ink-faint); font-size: .9rem; pointer-events: none; }
.calc-input .prefix { position: absolute; left: 14px; color: var(--ink-faint); font-size: .95rem; pointer-events: none; }
.calc-form input[type="number"] {
  width: 100%; font-family: var(--font-text); font-size: 1rem; color: var(--ink);
  padding: .65rem 2.6rem .65rem .8rem; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--white); -moz-appearance: textfield;
}
.calc-input.has-prefix input[type="number"] { padding-left: 1.9rem; }
.calc-form input[type="number"]:focus { outline: 2px solid var(--green-400); outline-offset: 1px; border-color: var(--green-400); }
.calc-form input[type="range"] { width: 100%; accent-color: var(--green-500); margin: .3rem 0 0; }
.range-row { display: flex; justify-content: space-between; align-items: baseline; }
.range-row output { font-weight: 700; color: var(--green-700); }

.calc-result h3 { margin: 0 0 .2rem; }
.result-headline { font-family: var(--font-display); font-weight: 600; line-height: 1.1;
  font-size: clamp(2.2rem, 6vw, 3rem); color: var(--green-800); margin: .4rem 0 .2rem; }
.result-headline #tvt-unit { font-size: 1rem; font-weight: 400; color: var(--ink-soft); font-family: var(--font-text); }
.result-list { list-style: none; margin: 1.2rem 0 0; padding: 0; }
.result-list li { display: flex; justify-content: space-between; gap: 1rem; padding: .55rem 0;
  border-bottom: 1px solid var(--border); font-size: .96rem; }
.result-list li:last-child { border-bottom: 0; }
.result-list .val { font-weight: 700; color: var(--ink); white-space: nowrap; }
.calc-advanced { margin-top: .6rem; }
.calc-advanced summary { cursor: pointer; font-weight: 700; font-size: .92rem; color: var(--green-700); }
.calc-advanced summary::-webkit-details-marker { display: none; }
.calc-advanced[open] { border-top: 1px solid var(--border); padding-top: 1rem; margin-top: 1rem; }

/* ----- Utility ---------------------------------------------------------- */
.stack > * + * { margin-top: 1rem; }
.badge { display: inline-block; background: var(--green-100); color: var(--green-700);
  font-size: .78rem; font-weight: 700; padding: .25rem .6rem; border-radius: 999px; }
.skip-link { position: absolute; left: -999px; }
.skip-link:focus { left: 16px; top: 12px; background: var(--white); padding: .5rem 1rem;
  border-radius: 8px; z-index: 200; box-shadow: var(--shadow); }