/* ============================================
   2027 Energiecheck — Design System
   Concept: de horizon-gradient (dag -> nacht) als
   visuele metafoor voor wat een batterij doet:
   zonne-energie van overdag opslaan voor gebruik
   's avonds/'s nachts. Dit motief keert terug in
   hero, sectiedividers en de resultaat-"meter".
   ============================================ */

:root {
  --ink: #0F1B2D;      /* nacht / opgeslagen energie */
  --ink-soft: #1B2C42;
  --amber: #F2A83C;    /* zon / opgewekte kWh */
  --amber-soft: #FCE2B0;
  --paper: #FAF7F1;    /* lichte achtergrond */
  --paper-dim: #F0EBE0;
  --slate: #55677D;    /* secundaire tekst */
  --teal: #1F8F6F;     /* besparing / positief */
  --rust: #C4562E;     /* kosten / waarschuwing */
  --line: #DDD6C7;

  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Inter", -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "Courier New", monospace;

  --radius: 4px;
  --max-width: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3, .display {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
}

h1 { font-size: clamp(2rem, 5vw, 3.4rem); font-weight: 700; }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); }
h3 { font-size: 1.25rem; }

p { margin: 0 0 1em; color: var(--ink-soft); }
a { color: var(--teal); }

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--rust);
  margin-bottom: 0.9em;
}

.mono, .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- Header ---------- */
header.site {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(250, 247, 241, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--ink);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--amber); display: inline-block; }
nav.site-nav { display: flex; gap: 28px; }
nav.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.94rem;
}
nav.site-nav a:hover { color: var(--teal); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 22px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:focus-visible { outline: 3px solid var(--amber); outline-offset: 2px; }
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { box-shadow: 0 6px 20px rgba(15,27,45,0.25); }
.btn-amber { background: var(--amber); color: var(--ink); }
.btn-amber:hover { box-shadow: 0 6px 20px rgba(242,168,60,0.35); }
.btn-ghost { background: transparent; border-color: var(--line); color: var(--ink); }
.btn-block { width: 100%; justify-content: center; }

/* ---------- Horizon device (signature element) ---------- */
.horizon {
  height: 6px;
  width: 100%;
  background: linear-gradient(90deg, var(--amber) 0%, var(--amber-soft) 30%, var(--slate) 60%, var(--ink) 100%);
}

.hero {
  background: linear-gradient(180deg, var(--paper) 0%, var(--paper) 60%, var(--paper-dim) 100%);
  padding: 84px 0 60px;
  position: relative;
  overflow: hidden;
}
.hero .wrap { position: relative; z-index: 2; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}
@media (max-width: 860px) { .hero-grid { grid-template-columns: 1fr; } }

.hero p.lead {
  font-size: 1.15rem;
  color: var(--ink-soft);
  max-width: 46ch;
}
.trust-row {
  display: flex;
  gap: 22px;
  margin-top: 28px;
  flex-wrap: wrap;
}
.trust-row span {
  font-size: 0.85rem;
  color: var(--slate);
  display: flex;
  align-items: center;
  gap: 6px;
}
.trust-row span::before { content: "—"; color: var(--teal); }

/* Hero visual: sun -> battery -> house-at-night, on the horizon line */
.hero-visual {
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 30% 30%, var(--amber-soft), transparent 60%),
              linear-gradient(160deg, var(--paper-dim) 0%, var(--ink) 100%);
  border-radius: 8px;
  position: relative;
  overflow: hidden;
}
.hero-visual svg { width: 100%; height: 100%; display: block; }

/* ---------- Sections ---------- */
section { padding: 72px 0; }
section.dim { background: var(--paper-dim); }
section.dark { background: var(--ink); color: var(--paper); }
section.dark h2, section.dark h3 { color: var(--paper); }
section.dark p { color: #B9C2CF; }

.section-head { max-width: 62ch; margin-bottom: 40px; }

.stat-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.stat-band .cell {
  background: var(--paper);
  padding: 28px 24px;
}
.stat-band .cell .num {
  font-size: 2.1rem;
  font-weight: 600;
  color: var(--ink);
  display: block;
}
.stat-band .cell .label { font-size: 0.88rem; color: var(--slate); }
@media (max-width: 720px) { .stat-band { grid-template-columns: 1fr; } }

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
@media (max-width: 780px) { .steps { grid-template-columns: 1fr; } }
.step .index {
  font-family: var(--font-mono);
  color: var(--amber);
  font-size: 0.85rem;
  display: block;
  margin-bottom: 10px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
@media (max-width: 720px) { .card-grid { grid-template-columns: 1fr; } }
.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  background: var(--paper);
  text-decoration: none;
  display: block;
  color: inherit;
  transition: border-color 0.15s ease;
}
.card:hover { border-color: var(--teal); }
.card .tag { font-family: var(--font-mono); font-size: 0.75rem; color: var(--rust); text-transform: uppercase; letter-spacing: 0.05em; }

/* ---------- FAQ ---------- */
.faq-item { border-bottom: 1px solid var(--line); padding: 18px 0; }
.faq-item summary { cursor: pointer; font-weight: 600; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-family: var(--font-mono); color: var(--slate); font-size: 1.2rem; }
.faq-item[open] summary::after { content: "−"; }
.faq-item p { margin-top: 12px; }

/* ---------- Calculator ---------- */
.calc-shell {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 32px;
  align-items: start;
}
@media (max-width: 900px) { .calc-shell { grid-template-columns: 1fr; } }

.calc-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 40px;
}
@media (max-width: 560px) { .calc-card { padding: 24px; } }

.progress-track {
  display: flex;
  gap: 6px;
  margin-bottom: 32px;
}
.progress-track .seg {
  height: 4px;
  flex: 1;
  background: var(--line);
  border-radius: 2px;
  overflow: hidden;
}
.progress-track .seg .fill { height: 100%; background: var(--amber); width: 0%; transition: width 0.3s ease; }

.calc-step { display: none; }
.calc-step.active { display: block; animation: fadein 0.25s ease; }
@keyframes fadein { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

.field { margin-bottom: 22px; }
.field label {
  display: block;
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 8px;
}
.field .hint { font-size: 0.82rem; color: var(--slate); margin-top: 6px; }
.field input[type="text"],
.field input[type="number"],
.field input[type="email"],
.field input[type="tel"],
.field select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 1rem;
  background: #fff;
  color: var(--ink);
}
.field input:focus, .field select:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(31,143,111,0.15);
}

.choice-row { display: flex; gap: 10px; flex-wrap: wrap; }
.choice-row label {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 16px;
  cursor: pointer;
  font-size: 0.92rem;
  font-weight: 500;
  margin: 0;
  display: inline-block;
}
.choice-row input { position: absolute; opacity: 0; pointer-events: none; }
.choice-row input:checked + span,
.choice-row label:has(input:checked) {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.step-nav { display: flex; justify-content: space-between; margin-top: 32px; gap: 12px; }

/* live meter side panel */
.meter-panel {
  background: var(--ink);
  color: var(--paper);
  border-radius: 8px;
  padding: 28px;
  position: sticky;
  top: 88px;
}
.meter-panel .eyebrow { color: var(--amber); }
.meter-row { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,0.12); font-size: 0.9rem; }
.meter-row:last-child { border-bottom: none; }
.meter-row .v { font-family: var(--font-mono); color: var(--amber-soft); }

/* results */
.result-block { border-top: 1px solid var(--line); padding: 32px 0; }
.result-block:first-child { border-top: none; }
.scenario-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 18px; }
@media (max-width: 700px) { .scenario-row { grid-template-columns: 1fr; } }
.scenario-row .cell { border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; text-align: center; }
.scenario-row .cell.mid { border-color: var(--ink); }
.scenario-row .cell .num { font-size: 1.5rem; display: block; margin: 6px 0; }
.scenario-row .cell .label { font-size: 0.8rem; color: var(--slate); text-transform: uppercase; letter-spacing: 0.04em; }

.locked {
  position: relative;
  padding: 28px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: var(--paper-dim);
}
.locked .blur-num { filter: blur(6px); user-select: none; }

.gate {
  background: var(--ink);
  color: var(--paper);
  border-radius: 8px;
  padding: 40px;
  margin-top: 40px;
}
.gate h2, .gate h3 { color: var(--paper); }
.gate .field input, .gate .field select { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.2); color: var(--paper); }
.gate .field label { color: var(--paper); }
.gate .field .hint { color: #93A2B4; }
.gate .checkbox-row { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 16px; }
.gate .checkbox-row input { margin-top: 4px; }
.gate .checkbox-row label { font-weight: 400; font-size: 0.88rem; color: #C7D0DA; }

.disclaimer-box {
  border-left: 3px solid var(--rust);
  background: var(--paper-dim);
  padding: 16px 20px;
  font-size: 0.9rem;
  color: var(--slate);
  border-radius: 0 var(--radius) var(--radius) 0;
}

/* ---------- Footer ---------- */
footer.site {
  background: var(--ink);
  color: #B9C2CF;
  padding: 56px 0 32px;
  font-size: 0.9rem;
}
footer.site a { color: #B9C2CF; }
footer.site .cols { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
@media (max-width: 700px) { footer.site .cols { grid-template-columns: 1fr; } }
footer.site h4 { color: var(--paper); font-family: var(--font-body); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 14px; }
footer.site ul { list-style: none; padding: 0; margin: 0; }
footer.site li { margin-bottom: 8px; }
footer.site .bottom { border-top: 1px solid rgba(255,255,255,0.12); padding-top: 20px; font-size: 0.8rem; }

/* ---------- Article pages ---------- */
.article { padding: 60px 0 90px; }
.article-body { max-width: 68ch; }
.article-body h2 { margin-top: 1.6em; }
.article-body ul, .article-body ol { color: var(--ink-soft); padding-left: 1.3em; }
.article-meta { font-family: var(--font-mono); font-size: 0.8rem; color: var(--slate); margin-bottom: 8px; }
.cta-inline {
  background: var(--paper-dim);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px;
  margin: 36px 0;
}