/* Sprayfo-beregner – Calvex A/S */

#productControl, #productName {display:none;} /* Hide Sprayfo vælgeren */

:root {
  --bg: #0a0a0a;
  --surface: #141414;
  --surface-2: #1c1c1c;
  --line: #2a2a2a;
  --text: #f4f4f2;
  --muted: #a3a39d;
  --green: #009b51;
  --green-bright: #1ec878;
  --green-dim: #00472a;
  --warn: #ffb020;
  --error: #ff5f56;
  --radius: 14px;
  --radius-s: 9px;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --font-num: ui-monospace, "SF Mono", "Cascadia Mono", "Roboto Mono", Menlo, monospace;
  --banner-h: 0px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  padding-bottom: calc(var(--banner-h) + env(safe-area-inset-bottom, 0px));
}

a { color: var(--green-bright); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 2px solid var(--green-bright);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------- Layout ---------- */

.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 16px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0 14px;
}

.site-header .logo { height: 44px; width: auto; display: block; margin-left: 16px; }

.lang-switch {
  display: flex;
  gap: 4px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .04em;
}
.lang-switch a, .lang-switch span {
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
}
.lang-switch [aria-current="page"] {
  color: #fff;
  border-color: var(--green);
  background: var(--green-dim);
}

.layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  padding-bottom: 48px;
}

@media (min-width: 880px) {
  .layout { grid-template-columns: 430px 1fr; gap: 56px; align-items: start; }
  .calc-col { position: sticky; top: 20px; }
}

/* ---------- Hero / intro ---------- */

.hero { padding: 6px 0 22px; }

.eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--green-bright);
  margin: 0 0 8px;
}

h1 {
  font-size: clamp(26px, 5vw, 38px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 10px;
  font-weight: 750;
}

.hero p.lead {
  color: var(--muted);
  font-size: 17px;
  max-width: 52ch;
  margin: 0;
}

/* ---------- Calculator card ---------- */

.calc {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.calc-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  background: var(--surface-2);
}

.calc-head .product-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
}

.calc-head .product-name {
  font-weight: 700;
  color: #fff;
}

button.reset {
  background: none;
  border: 1px solid var(--line);
  color: var(--muted);
  font: 600 12px/1 var(--font-body);
  letter-spacing: .05em;
  padding: 7px 12px;
  border-radius: 999px;
  cursor: pointer;
}
button.reset:hover { color: #fff; border-color: var(--green); }

.calc-body { padding: 18px; display: grid; gap: 16px; }

.field { display: grid; gap: 6px; }

.field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: .02em;
}

.field .help { font-size: 12.5px; color: var(--muted); opacity: .8; margin: 0; }

.control {
  display: flex;
  align-items: center;
  gap: 10px;
}

select, input[type="number"] {
  appearance: none;
  -webkit-appearance: none;
  background: var(--bg);
  border: 1px solid var(--line);
  color: var(--text);
  font: 600 18px/1.2 var(--font-num);
  font-variant-numeric: tabular-nums;
  border-radius: var(--radius-s);
  padding: 12px 14px;
  width: 100%;
  min-height: 48px;
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%231ec878' stroke-width='2'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 38px;
}

select:focus, input:focus {
  border-color: var(--green);
  outline: none;
  box-shadow: 0 0 0 3px rgba(0, 155, 81, .25);
}

.unit { color: var(--muted); font-size: 14px; font-weight: 600; white-space: nowrap; }

.min-note {
  font-size: 13px;
  font-weight: 600;
  color: var(--green-bright);
}
.min-note.error { color: var(--error); }

/* ---------- Brix scale (signature) ---------- */

.brix-scale { padding: 4px 2px 0; }

.brix-scale .scale-track {
  position: relative;
  height: 38px;
}

.brix-scale .scale-bar {
  position: absolute;
  left: 0; right: 0; top: 16px;
  height: 6px;
  border-radius: 3px;
  background: var(--surface-2);
  overflow: hidden;
}

.brix-scale .scale-fill {
  position: absolute;
  top: 0; bottom: 0;
  background: linear-gradient(90deg, var(--green-dim), var(--green));
  border-radius: 3px;
  transition: left .25s ease, width .25s ease;
}

.brix-scale .marker {
  position: absolute;
  top: 8px;
  width: 2px;
  height: 22px;
  background: #fff;
  transform: translateX(-1px);
  transition: left .25s ease;
}
.brix-scale .marker.target { background: var(--green-bright); }

.brix-scale .marker .tag {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  font: 700 9.5px/1 var(--font-body);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}
.brix-scale .marker.target .tag { color: var(--green-bright); top: auto; bottom: -12px; }

.brix-scale .scale-ends {
  display: flex;
  justify-content: space-between;
  font: 600 11px/1 var(--font-num);
  color: var(--muted);
  margin-top: 14px;
}

/* ---------- Results ---------- */

.results {
  border-top: 1px solid var(--line);
  background:
    radial-gradient(120% 160% at 0% 0%, rgba(0, 155, 81, .14), transparent 55%),
    var(--surface-2);
  padding: 18px;
  display: grid;
  gap: 14px;
}

.result-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.result-row .r-label { font-size: 14px; color: var(--muted); font-weight: 600; }

.result-row .r-value {
  font: 700 30px/1 var(--font-num);
  font-variant-numeric: tabular-nums;
  color: #fff;
  letter-spacing: -0.01em;
}
.result-row .r-value .r-unit {
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  margin-left: 6px;
  letter-spacing: 0;
}
.result-row.primary .r-value { color: var(--green-bright); font-size: 38px; }

.result-row.acid {
  border-top: 1px dashed var(--line);
  padding-top: 12px;
}
.result-row.acid .r-value { font-size: 22px; }

.notice {
  display: none;
  font-size: 13.5px;
  font-weight: 600;
  border-radius: var(--radius-s);
  padding: 10px 12px;
  line-height: 1.45;
}
.notice.show { display: block; }
.notice.warn { background: rgba(255, 176, 32, .12); color: var(--warn); border: 1px solid rgba(255, 176, 32, .35); }
.notice.error { background: rgba(255, 95, 86, .1); color: var(--error); border: 1px solid rgba(255, 95, 86, .35); }

.product-note {
  padding: 12px 18px 16px;
  font-size: 12.5px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* ---------- Content / SEO sections ---------- */

.content h2 {
  font-size: 22px;
  letter-spacing: -0.01em;
  margin: 34px 0 10px;
}
.content h2:first-child { margin-top: 0; }

.content p, .content li { color: #d4d4d0; max-width: 64ch; }

.content ol.steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}
.content ol.steps li {
  counter-increment: step;
  position: relative;
  padding-left: 42px;
}
.content ol.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0; top: 1px;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--green-dim);
  color: var(--green-bright);
  font: 700 14px/28px var(--font-num);
  text-align: center;
}

details.faq {
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: var(--surface);
  margin-bottom: 8px;
}
details.faq summary {
  cursor: pointer;
  padding: 13px 16px;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after {
  content: "+";
  color: var(--green-bright);
  font: 700 18px/1 var(--font-num);
  flex: none;
}
details.faq[open] summary::after { content: "–"; }
details.faq .faq-a { padding: 0 16px 14px; }
details.faq .faq-a p { margin: 0; }

.site-footer {
  border-top: 1px solid var(--line);
  padding: 22px 0 30px;
  font-size: 13px;
  color: var(--muted);
}
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 22px; justify-content: space-between; }

/* ---------- Banner ---------- */

.ad-banner {
  display: none;
  background: linear-gradient(0deg, #0d0d0d, #161616);
  border-top: 1px solid var(--line);
}
.ad-banner.show { display: block; }

.ad-banner.sticky {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 50;
  padding-bottom: env(safe-area-inset-bottom, 0px);
  box-shadow: 0 -8px 24px rgba(0, 0, 0, .55);
}

.ad-banner .ad-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 16px;
}

.ad-banner img.ad-img { height: 40px; width: 40px; border-radius: 8px; object-fit: cover; flex: none; }

.ad-banner .ad-text { flex: 1; min-width: 0; }
.ad-banner .ad-eyebrow {
  display: block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--green-bright);
}
.ad-banner .ad-copy {
  display: block;
  font-size: 13.5px;
  color: #e6e6e2;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.ad-banner a.ad-cta {
  flex: none;
  background: var(--green);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  padding: 10px 18px;
  border-radius: 999px;
  white-space: nowrap;
}
.ad-banner a.ad-cta:hover { background: var(--green-bright); text-decoration: none; }