/* btw-bereken.nl — stylesheet */
:root {
  --navy: #17324d;
  --navy-2: #22476b;
  --accent: #e8892b;
  --accent-soft: #fdf1e4;
  --bg: #f5f6f4;
  --card: #ffffff;
  --text: #1f2933;
  --muted: #5b6875;
  --line: #dde2e6;
  --ok: #1e7a4c;
  --radius: 12px;
  --max: 1080px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 100%; -webkit-text-size-adjust: 100%; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

a { color: var(--navy-2); }
a:hover { color: var(--accent); }

img { max-width: 100%; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 16px; }

/* Header */
.site-header { background: var(--navy); color: #fff; position: relative; z-index: 10; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; min-height: 64px; gap: 16px; }
.logo { color: #fff; text-decoration: none; font-weight: 800; font-size: 1.25rem; letter-spacing: -0.01em; display: flex; align-items: center; gap: 10px; }
.logo:hover { color: #fff; }
.logo-mark { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 8px; background: var(--accent); color: var(--navy); font-weight: 900; font-size: 0.95rem; }

.nav-toggle { display: none; background: none; border: 1px solid rgba(255,255,255,.4); color: #fff; border-radius: 8px; padding: 6px 12px; font-size: 1rem; cursor: pointer; }

.main-nav > ul { list-style: none; display: flex; gap: 4px; }
.main-nav li { position: relative; }
.main-nav a { display: block; color: #fff; text-decoration: none; padding: 10px 12px; border-radius: 8px; font-size: 0.95rem; }
.main-nav a:hover, .main-nav a[aria-current="page"] { background: var(--navy-2); color: #fff; }
.main-nav .sub { list-style: none; position: absolute; left: 0; top: 100%; min-width: 220px; background: #fff; border-radius: 10px; box-shadow: 0 10px 30px rgba(0,0,0,.15); padding: 6px; display: none; }
.main-nav .sub a { color: var(--text); }
.main-nav .sub a:hover { background: var(--accent-soft); color: var(--navy); }
.main-nav li:hover > .sub, .main-nav li:focus-within > .sub { display: block; }

@media (max-width: 820px) {
  .nav-toggle { display: block; }
  .main-nav { display: none; position: absolute; left: 0; right: 0; top: 64px; background: var(--navy); padding: 8px 16px 16px; }
  .main-nav.open { display: block; }
  .main-nav > ul { flex-direction: column; }
  .main-nav .sub { position: static; display: block; background: transparent; box-shadow: none; padding: 0 0 0 14px; }
  .main-nav .sub a { color: #d9e2ea; }
  .main-nav .sub a:hover { background: var(--navy-2); color: #fff; }
}

/* Breadcrumbs */
.crumbs { font-size: 0.85rem; color: var(--muted); padding-top: 14px; }
.crumbs a { color: var(--muted); }

/* Layout */
main { padding: 8px 0 48px; }
.hero { padding: 28px 0 8px; }
h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); line-height: 1.2; color: var(--navy); letter-spacing: -0.02em; }
.lead { font-size: 1.1rem; color: var(--muted); margin-top: 8px; max-width: 720px; }

.content { max-width: 760px; }
.content h2 { font-size: 1.5rem; color: var(--navy); margin: 40px 0 12px; line-height: 1.3; }
.content h3 { font-size: 1.15rem; color: var(--navy); margin: 24px 0 8px; }
.content p { margin: 0 0 14px; }
.content ul, .content ol { margin: 0 0 14px 22px; }
.content li { margin-bottom: 6px; }

.updated { font-size: 0.85rem; color: var(--muted); margin-top: 32px; }

/* Calculator */
.calc { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 6px 24px rgba(23,50,77,.08); padding: 20px; margin: 22px 0 8px; max-width: 760px; }
.calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 640px) { .calc-grid { grid-template-columns: 1fr; } }
.calc label, .calc .label { display: block; font-weight: 600; font-size: 0.9rem; margin-bottom: 6px; color: var(--navy); }
.calc-amount-wrap { position: relative; }
.calc-amount-wrap span { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--muted); font-weight: 600; }
.calc input[type=text] { width: 100%; font-size: 1.35rem; padding: 12px 14px 12px 34px; border: 2px solid var(--line); border-radius: 10px; font-family: inherit; }
.calc input[type=text]:focus { outline: none; border-color: var(--accent); }
.seg { display: flex; flex-wrap: wrap; gap: 6px; }
.seg button { flex: 1 1 auto; min-width: 64px; padding: 10px 12px; border: 2px solid var(--line); background: #fff; border-radius: 10px; font-size: 0.95rem; font-weight: 600; color: var(--text); cursor: pointer; font-family: inherit; }
.seg button[aria-pressed="true"] { border-color: var(--navy); background: var(--navy); color: #fff; }
.seg .custom { display: flex; align-items: center; gap: 4px; border: 2px solid var(--line); border-radius: 10px; padding: 0 10px; flex: 1 1 110px; }
.seg .custom.active { border-color: var(--navy); }
.seg .custom input { width: 60px; border: 0; font-size: 0.95rem; padding: 8px 0; font-family: inherit; background: transparent; }
.seg .custom input:focus { outline: none; }
.mode { margin-top: 18px; }
.results { margin-top: 20px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
@media (max-width: 640px) { .results { grid-template-columns: 1fr; } }
.result { background: var(--bg); border-radius: 10px; padding: 12px 14px; position: relative; }
.result.total { background: var(--accent-soft); }
.result .r-label { font-size: 0.82rem; color: var(--muted); font-weight: 600; }
.result .r-value { font-size: 1.4rem; font-weight: 800; color: var(--navy); font-variant-numeric: tabular-nums; }
.result button.copy { position: absolute; right: 8px; top: 8px; border: 0; background: transparent; color: var(--muted); font-size: 0.75rem; cursor: pointer; padding: 4px 6px; border-radius: 6px; font-family: inherit; }
.result button.copy:hover { background: #fff; color: var(--navy); }
.calc-note { font-size: 0.85rem; color: var(--muted); margin-top: 12px; }

/* Link cards */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; margin: 28px 0 8px; }
.card { display: block; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; text-decoration: none; color: var(--text); transition: border-color .15s, transform .15s; }
.card:hover { border-color: var(--accent); transform: translateY(-2px); color: var(--text); }
.card strong { display: block; color: var(--navy); margin-bottom: 4px; }
.card span { font-size: 0.9rem; color: var(--muted); }

/* Tables */
.table-wrap { overflow-x: auto; margin: 0 0 18px; }
table { border-collapse: collapse; width: 100%; background: var(--card); border-radius: 10px; overflow: hidden; font-size: 0.95rem; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: var(--navy); color: #fff; font-weight: 600; }
tr:last-child td { border-bottom: 0; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }

/* Boxes */
.box { background: var(--card); border-left: 4px solid var(--accent); border-radius: 8px; padding: 14px 16px; margin: 0 0 18px; }
.box.info { border-left-color: var(--navy-2); }
.formula { font-family: ui-monospace, Consolas, monospace; background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 10px 14px; margin: 0 0 14px; display: block; }

/* FAQ */
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: 10px; margin-bottom: 8px; }
.faq summary { cursor: pointer; padding: 14px 16px; font-weight: 600; color: var(--navy); list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; float: right; color: var(--accent); font-weight: 800; }
.faq details[open] summary::after { content: "–"; }
.faq details > div { padding: 0 16px 14px; }

/* Related */
.related { margin-top: 36px; }

/* Footer */
.site-footer { background: var(--navy); color: #c9d4de; padding: 36px 0 24px; font-size: 0.92rem; }
.footer-cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 24px; }
.site-footer h3 { color: #fff; font-size: 1rem; margin-bottom: 10px; }
.site-footer ul { list-style: none; }
.site-footer li { margin-bottom: 6px; }
.site-footer a { color: #c9d4de; text-decoration: none; }
.site-footer a:hover { color: var(--accent); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.15); margin-top: 24px; padding-top: 16px; font-size: 0.85rem; }

/* Btw-bedrag in de kijker */
.calc.focus-vat .result:nth-child(2) { background: var(--accent-soft); }
.calc.focus-vat .result.total { background: var(--bg); }