/* WattsDue design system v2: professional dashboard
   Palette: canvas #F3F5F4, panel #FFFFFF, header #0F231C, ink #16241F,
   volt #0E9F6E, amber #B97E10, slate #62716B
   Type: Space Grotesk (display), Inter (body), IBM Plex Mono (figures) */

:root {
  --canvas: #F3F5F4;
  --panel: #FFFFFF;
  --panel-2: #F8FAF9;
  --header: #0F231C;
  --header-2: #16382C;
  --ink: #16241F;
  --slate: #62716B;
  --line: #E2E8E5;
  --line-strong: #CBD5D0;
  --volt: #0E9F6E;
  --volt-dark: #0A7A54;
  --volt-soft: #E6F5EE;
  --amber: #B97E10;
  --amber-soft: #FBF3E1;
  --danger: #B4452F;
  --danger-soft: #F9EAE6;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(15, 35, 28, 0.06), 0 4px 16px rgba(15, 35, 28, 0.04);
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", monospace;
}

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

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1100px; margin: 0 auto; padding: 0 22px; }

/* ---------- header ---------- */
.site-header {
  background: var(--header);
  border-bottom: 3px solid var(--volt);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 14px; padding-bottom: 14px; gap: 16px; flex-wrap: wrap;
}
.brand {
  font-family: var(--font-display);
  font-weight: 700; font-size: 1.12rem; letter-spacing: -0.01em;
  color: #FFFFFF; text-decoration: none;
  display: inline-flex; align-items: center; gap: 10px;
}
.brand svg { display: block; }
.brand .tld { color: #4FD6A5; }
.site-nav { display: flex; gap: 6px; flex-wrap: wrap; }
.site-nav a {
  text-decoration: none; color: #C3D2CB;
  font-size: 0.87rem; font-weight: 500;
  padding: 7px 13px; border-radius: 8px;
  border: 1px solid transparent;
}
.site-nav a:hover { color: #FFFFFF; background: rgba(255,255,255,0.08); }
.site-nav a.active {
  background: rgba(255,255,255,0.10); color: #FFFFFF;
  border-color: rgba(255,255,255,0.18);
}
.site-nav a .flag { margin-right: 6px; }

/* ---------- hero ---------- */
.hero { padding: 44px 0 30px; }
.eyebrow {
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--volt-dark);
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--volt-soft); border: 1px solid #C9E8DB;
  padding: 5px 12px; border-radius: 999px;
}
h1 {
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 4vw, 2.45rem);
  line-height: 1.14; letter-spacing: -0.02em;
  margin: 14px 0 12px; font-weight: 700;
}
.lede { color: var(--slate); font-size: 1.04rem; max-width: 48em; margin: 0; }

/* ---------- layout ---------- */
main { padding-bottom: 64px; }
.tool-grid {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 22px; align-items: start; margin-top: 26px;
}
@media (max-width: 840px) { .tool-grid { grid-template-columns: 1fr; } }

.card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px;
  box-shadow: var(--shadow);
}
.card h2 {
  font-family: var(--font-mono); font-size: 0.7rem; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--slate);
  margin: 0 0 16px; padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

/* ---------- forms ---------- */
.field { margin-bottom: 16px; }
.field label {
  display: block; font-size: 0.84rem; font-weight: 600;
  margin-bottom: 6px; color: var(--ink);
}
.field .hint { font-size: 0.75rem; color: var(--slate); font-weight: 400; }
.field input[type="text"],
.field input[type="number"],
.field select {
  width: 100%; padding: 10px 12px;
  border: 1px solid var(--line-strong); border-radius: 8px;
  font-family: var(--font-body); font-size: 0.95rem;
  color: var(--ink); background: #fff;
  transition: border-color 0.12s, box-shadow 0.12s;
}
.field input:hover, .field select:hover { border-color: #A9BBB2; }
.field input:focus, .field select:focus {
  outline: none; border-color: var(--volt);
  box-shadow: 0 0 0 3px rgba(14, 159, 110, 0.15);
}
.seg button:focus-visible, a:focus-visible, button:focus-visible {
  outline: 2px solid var(--volt); outline-offset: 2px;
}
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 480px) { .field-row { grid-template-columns: 1fr; } }

.seg {
  display: inline-flex; border: 1px solid var(--line-strong);
  border-radius: 8px; overflow: hidden; background: var(--panel-2);
}
.seg button {
  border: 0; background: transparent; padding: 9px 18px;
  font-family: var(--font-body); font-size: 0.88rem; font-weight: 600;
  color: var(--slate); cursor: pointer;
}
.seg button.on { background: var(--header); color: #fff; }

/* ---------- VIN strip ---------- */
.vin-strip { display: grid; grid-template-columns: repeat(17, 1fr); gap: 3px; margin-top: 10px; }
.vin-strip span {
  font-family: var(--font-mono); font-size: 0.8rem; text-align: center;
  padding: 6px 0; border: 1px solid var(--line); border-radius: 5px;
  background: var(--panel-2); color: var(--slate); min-width: 0;
  transition: background 0.15s, border-color 0.15s;
}
.vin-strip span.filled { color: var(--ink); background: #fff; border-color: var(--line-strong); }
.vin-strip span.origin-us { background: var(--volt-soft); border-color: var(--volt); color: var(--volt-dark); font-weight: 700; }
.vin-strip span.origin-no { background: var(--danger-soft); border-color: var(--danger); color: var(--danger); font-weight: 700; }
.vin-strip span.checkdigit-ok { background: var(--volt-soft); }
.vin-strip span.checkdigit-bad { background: var(--danger-soft); }
@media (max-width: 560px) {
  .vin-strip { gap: 2px; }
  .vin-strip span { font-size: 0.6rem; padding: 4px 0; border-radius: 3px; }
}

.verdict {
  margin-top: 12px; padding: 12px 14px; border-radius: 8px;
  font-size: 0.88rem; line-height: 1.5; display: none;
}
.verdict.show { display: block; }
.verdict.ok { background: var(--volt-soft); border: 1px solid #9BD8BE; }
.verdict.no { background: var(--danger-soft); border: 1px solid #E0A08F; }
.verdict.warn { background: var(--amber-soft); border: 1px solid #E3C588; }

/* ---------- KPI tiles ---------- */
.kpis {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 10px; margin-bottom: 16px;
}
@media (max-width: 480px) { .kpis { grid-template-columns: 1fr; } }
.kpi {
  background: var(--panel-2); border: 1px solid var(--line);
  border-radius: 10px; padding: 14px 14px 12px;
}
.kpi.primary {
  background: linear-gradient(160deg, #10382B, #0F231C);
  border-color: #0F231C;
}
.kpi .k-label {
  display: block; font-family: var(--font-mono); font-size: 0.62rem;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--slate);
  margin-bottom: 6px; line-height: 1.4;
}
.kpi.primary .k-label { color: #8FBFA9; }
.kpi .k-value {
  display: block; font-family: var(--font-mono); font-weight: 600;
  font-size: 1.35rem; letter-spacing: -0.01em; color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.kpi.primary .k-value { color: #5CE3AC; font-size: 1.5rem; }
.kpi .k-sub { display: block; font-size: 0.7rem; color: var(--slate); margin-top: 2px; }
.kpi.primary .k-sub { color: #7FA593; }

.status-line { font-size: 0.83rem; color: var(--slate); margin: 0 0 12px; }

/* charge meter */
.meter { margin: 6px 0 14px; }
.meter .track {
  height: 10px; border-radius: 999px; background: #E7EDEA;
  border: 1px solid var(--line); overflow: hidden;
}
.meter .fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--volt), var(--volt-dark));
  border-radius: 999px; transition: width 0.5s ease;
}
.meter .scale {
  display: flex; justify-content: space-between;
  font-family: var(--font-mono); font-size: 0.66rem; color: var(--slate); margin-top: 5px;
}

/* ---------- results table ---------- */
table.results {
  width: 100%; border-collapse: separate; border-spacing: 0;
  font-size: 0.88rem; margin-top: 4px;
  border: 1px solid var(--line); border-radius: 10px; overflow: hidden;
}
table.results th, table.results td {
  text-align: right; padding: 9px 12px;
}
table.results th:first-child, table.results td:first-child { text-align: left; }
table.results thead th {
  font-family: var(--font-mono); font-size: 0.64rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--slate); font-weight: 600;
  background: var(--panel-2); border-bottom: 1px solid var(--line);
}
table.results tbody td {
  font-variant-numeric: tabular-nums; font-family: var(--font-mono);
  font-size: 0.83rem; border-bottom: 1px solid var(--line);
}
table.results tbody td:first-child { font-family: var(--font-body); }
table.results tbody tr:nth-child(even) td { background: #FBFCFB; }
table.results tr.total td {
  font-weight: 700; color: var(--volt-dark);
  background: var(--volt-soft); border-bottom: 0;
}

.note { font-size: 0.79rem; color: var(--slate); margin-top: 14px; }
.note strong { color: var(--ink); }

button.calc {
  width: 100%; padding: 13px; margin-top: 8px;
  background: var(--volt); color: #fff; border: 0; border-radius: 8px;
  font-family: var(--font-display); font-weight: 700; font-size: 0.98rem;
  letter-spacing: 0.01em; cursor: pointer;
  box-shadow: 0 1px 2px rgba(10, 122, 84, 0.4);
  transition: background 0.12s;
}
button.calc:hover { background: var(--volt-dark); }

/* ---------- tool cards on home ---------- */
.tools { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 32px; }
@media (max-width: 720px) { .tools { grid-template-columns: 1fr; } }
.tool-card {
  display: block; text-decoration: none; color: inherit;
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px;
  box-shadow: var(--shadow);
  transition: border-color 0.15s, transform 0.15s, box-shadow 0.15s;
  border-top: 3px solid var(--volt);
}
.tool-card:hover {
  border-color: var(--volt); transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(15, 35, 28, 0.10);
}
.tool-card .country {
  font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--slate);
}
.tool-card h3 { font-family: var(--font-display); margin: 10px 0 8px; font-size: 1.16rem; letter-spacing: -0.01em; }
.tool-card p { margin: 0; color: var(--slate); font-size: 0.92rem; }
.tool-card .go { display: inline-block; margin-top: 16px; font-weight: 600; font-size: 0.88rem; color: var(--volt-dark); }

/* ---------- prose / faq ---------- */
.prose { max-width: 48em; margin-top: 44px; }
.prose h2 {
  font-family: var(--font-display); font-size: 1.32rem;
  letter-spacing: -0.01em; margin: 36px 0 10px;
}
.prose h3 { font-family: var(--font-display); font-size: 1.02rem; margin: 24px 0 6px; }
.prose p, .prose li { color: #36453F; font-size: 0.95rem; }
.prose a { color: var(--volt-dark); }
details.faq {
  border: 1px solid var(--line); border-radius: 10px;
  background: var(--panel); margin-bottom: 10px; padding: 0 16px;
  box-shadow: var(--shadow);
}
details.faq summary {
  cursor: pointer; font-weight: 600; font-size: 0.93rem;
  padding: 13px 0; list-style: none; position: relative;
}
details.faq summary::after {
  content: "+"; position: absolute; right: 2px; top: 10px;
  font-family: var(--font-mono); color: var(--volt-dark); font-size: 1.1rem;
}
details.faq[open] summary::after { content: "\2212"; }
details.faq p { margin: 0 0 14px; font-size: 0.89rem; color: #36453F; }

/* ---------- ad slots ---------- */
.ad-slot {
  margin: 30px 0; min-height: 90px;
  border: 1px dashed var(--line-strong); border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: #A9B6B0; background: #FAFBFA;
}

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--line); background: var(--panel);
  padding: 28px 0; margin-top: 20px;
  font-size: 0.82rem; color: var(--slate);
}
.site-footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.site-footer a { color: var(--slate); text-decoration: none; margin-right: 14px; }
.site-footer a:hover { color: var(--volt-dark); }
.disclaimer { max-width: 60em; font-size: 0.75rem; margin-top: 10px; }

/* ---------- charging tools section ---------- */
.check-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 8px; margin-top: 8px; margin-bottom: 8px;
}
.check-grid label {
  display: flex; align-items: center; gap: 9px;
  font-weight: 500; font-size: 0.88rem; color: var(--ink);
  background: var(--panel-2); border: 1px solid var(--line);
  border-radius: 8px; padding: 10px 12px; margin: 0; cursor: pointer;
}
.check-grid label:hover { border-color: var(--volt); }
.check-grid input { width: auto; accent-color: var(--volt); }

.result {
  border-radius: 10px; padding: 18px 20px; margin-top: 18px;
  white-space: pre-wrap; display: none;
  font-size: 0.9rem; line-height: 1.6;
  background: var(--volt-soft); border: 1px solid #9BD8BE;
  border-left: 5px solid var(--volt);
}
.result.show { display: block; }
.result.warn {
  background: var(--amber-soft); border-color: #E3C588;
  border-left-color: var(--amber);
}
.result .big {
  font-family: var(--font-display);
  font-size: 1.3rem; font-weight: 700; color: var(--ink);
  display: block; margin-bottom: 8px; letter-spacing: -0.01em;
  white-space: normal;
}