:root {
  color-scheme: light;
  --bg: #f4f6f1; --surface: #fff; --surface-soft: #fafbf9;
  --ink: #17211e; --muted: #60706a; --line: #dce3dc;
  --green: #176b4d; --green-soft: #e5f2eb;
  --orange: #b55b24; --orange-soft: #f8ece4;
  --warning: #fff7e8; --warning-line: #e8cf9c; --danger: #b42318;
  --shadow: 0 12px 40px rgba(30, 43, 38, .06);
}
* { box-sizing: border-box; }
html { min-width: 320px; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
a { color: inherit; }
button, input { font: inherit; }
.shell { width: min(1040px, calc(100% - 40px)); margin-inline: auto; }
.site-header { width: min(1120px, calc(100% - 40px)); min-height: 78px; margin-inline: auto; display: flex; align-items: center; justify-content: space-between; gap: 20px; border-bottom: 1px solid var(--line); }
.brand { text-decoration: none; font-size: 19px; font-weight: 800; letter-spacing: -.04em; }
.brand span, .eyebrow, .step { color: var(--green); }
.site-header nav, .site-footer nav { display: flex; align-items: center; gap: 6px; }
.site-header nav a { padding: 9px 12px; border-radius: 9px; color: var(--muted); text-decoration: none; font-size: 14px; font-weight: 650; }
.site-header nav a:hover, .site-header nav a[aria-current="page"] { background: var(--green-soft); color: var(--green); }
.landing, .calculator, .legal { padding-block: 64px 34px; }
.hero, .page-intro { max-width: 760px; margin-bottom: 46px; }
.eyebrow, .step { margin: 0 0 8px; font-size: 12px; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 18px; font-size: clamp(42px, 7vw, 76px); line-height: .98; letter-spacing: -.06em; }
h2 { margin-bottom: 0; font-size: 23px; letter-spacing: -.035em; }
.lead { margin-bottom: 0; color: var(--muted); font-size: 17px; line-height: 1.7; }
.tool-list { margin-top: 72px; }
.section-heading { margin-bottom: 18px; }
.tool-grid { display: grid; gap: 14px; }
.tool-card { display: grid; grid-template-columns: 42px 1fr auto; align-items: center; gap: 18px; padding: 24px; border: 1px solid var(--line); border-radius: 20px; background: var(--surface); box-shadow: var(--shadow); text-decoration: none; transition: transform .18s ease, border-color .18s ease; }
.tool-card:hover { transform: translateY(-2px); border-color: color-mix(in srgb, var(--green) 45%, var(--line)); }
.tool-number { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 13px; background: var(--green-soft); color: var(--green); font-weight: 800; }
.tool-copy strong, .tool-copy small { display: block; }
.tool-copy strong { margin: 3px 0 5px; font-size: 18px; }
.tool-copy small { color: var(--muted); font-size: 13px; }
.tool-copy .tool-category { color: var(--green); font-size: 11px; font-weight: 750; letter-spacing: .06em; text-transform: uppercase; }
.arrow { color: var(--green); font-size: 28px; }
.panel, .legal-card { border: 1px solid var(--line); border-radius: 22px; background: var(--surface); box-shadow: var(--shadow); }
.trip-panel { display: grid; grid-template-columns: 1fr minmax(240px, 360px); align-items: end; gap: 28px; padding: 26px; margin-bottom: 18px; }
.vehicle-grid { display: grid; grid-template-columns: .82fr 1.18fr; gap: 18px; }
.vehicle-card { padding: 26px; }
.card-heading { display: flex; align-items: center; gap: 14px; margin-bottom: 24px; }
.vehicle-icon { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 13px; font-weight: 850; }
.petrol .vehicle-icon { color: var(--orange); background: var(--orange-soft); }
.electric .vehicle-icon { color: var(--green); background: var(--green-soft); }
.field { display: block; margin-top: 16px; }
.field > span:first-child { display: block; margin-bottom: 7px; color: var(--muted); font-size: 13px; font-weight: 650; }
.input-wrap { display: flex; align-items: center; border: 1px solid var(--line); border-radius: 13px; background: var(--surface-soft); transition: .18s ease; }
.input-wrap:focus-within { border-color: var(--green); box-shadow: 0 0 0 3px color-mix(in srgb, var(--green) 16%, transparent); background: var(--surface); }
.input-wrap input { width: 100%; min-width: 0; padding: 13px 8px 13px 14px; border: 0; outline: 0; background: transparent; color: var(--ink); font-weight: 750; }
.input-wrap small { flex: none; padding-right: 13px; color: var(--muted); font-size: 12px; }
.adhoc { margin-top: 22px; padding: 17px; border: 1px solid transparent; border-radius: 16px; background: var(--surface-soft); }
.adhoc.active { border-color: var(--warning-line); background: var(--warning); }
.adhoc-status { display: flex; justify-content: space-between; gap: 14px; color: var(--muted); font-size: 13px; }
.adhoc-status strong { color: var(--ink); text-align: right; }
.form-error, .legal-warning { margin: 14px 0 0; padding: 13px 15px; border-radius: 12px; background: color-mix(in srgb, var(--danger) 10%, var(--surface)); color: var(--danger); font-size: 14px; }
.results { margin-top: 18px; padding: 28px; }
.results-heading { display: flex; justify-content: space-between; align-items: end; gap: 20px; margin-bottom: 24px; }
.results-heading button { padding: 9px 12px; border: 1px solid var(--line); border-radius: 10px; background: transparent; color: var(--muted); cursor: pointer; }
.cost-grid { display: grid; grid-template-columns: 1fr 1fr .85fr; gap: 12px; }
.cost, .saving { display: flex; min-height: 150px; padding: 20px; border-radius: 17px; flex-direction: column; }
.petrol-cost { background: var(--orange-soft); }
.electric-cost { background: var(--green-soft); }
.saving { border: 1px solid var(--line); }
.cost span, .saving span { color: var(--muted); font-size: 13px; font-weight: 650; }
.cost strong, .saving strong { margin-top: auto; font-size: 35px; letter-spacing: -.05em; }
.cost small, .saving small { margin-top: 4px; color: var(--muted); }
.saving strong { color: var(--green); }
.details { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 26px; border-top: 1px solid var(--line); }
.details div { padding: 20px 12px 0 0; }
.details span, .details strong { display: block; }
.details span { margin-bottom: 7px; color: var(--muted); font-size: 12px; }
.details strong { font-size: 14px; }
.privacy-note { display: grid; grid-template-columns: 190px 1fr; gap: 18px; margin-top: 18px; padding: 17px 20px; color: var(--muted); font-size: 13px; line-height: 1.6; }
.privacy-note strong { color: var(--ink); }
.legal .page-intro { margin-bottom: 28px; }
.legal-warning { margin: 0 0 18px; border: 1px solid color-mix(in srgb, var(--danger) 35%, transparent); }
.legal-warning strong { display: block; margin-bottom: 3px; }
.legal-card { max-width: 800px; padding: 30px; }
.legal-card h2 { margin: 30px 0 10px; font-size: 20px; }
.legal-card h2:first-child { margin-top: 0; }
.legal-card p, .legal-card address { margin-bottom: 0; color: var(--muted); font-style: normal; line-height: 1.75; }
.prose p + p { margin-top: 12px; }
code { padding: 2px 5px; border-radius: 5px; background: var(--surface-soft); }
.site-footer { display: flex; justify-content: space-between; gap: 20px; padding-block: 25px 40px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.site-footer a { text-decoration: none; }
.site-footer a:hover { color: var(--ink); }
@media (prefers-color-scheme: dark) {
  :root { color-scheme: dark; --bg: #101512; --surface: #18201c; --surface-soft: #131a16; --ink: #edf4ef; --muted: #9eaca4; --line: #2c3932; --green: #66cca1; --green-soft: #18372b; --orange: #ef9b67; --orange-soft: #3a281f; --warning: #322b1c; --warning-line: #705b2e; --danger: #ff8c84; --shadow: 0 12px 44px rgba(0, 0, 0, .22); }
}
@media (max-width: 760px) {
  .shell, .site-header { width: min(100% - 28px, 1040px); }
  .site-header { min-height: 68px; }
  .brand { font-size: 17px; }
  .site-header nav a { padding: 8px; font-size: 13px; }
  .landing, .calculator, .legal { padding-top: 42px; }
  .trip-panel, .vehicle-grid, .cost-grid { grid-template-columns: 1fr; }
  .panel { padding: 20px; }
  .details { grid-template-columns: 1fr 1fr; }
  .saving { min-height: 110px; }
  .privacy-note { grid-template-columns: 1fr; gap: 5px; }
  .site-footer { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 480px) {
  h1 { font-size: 42px; }
  .page-intro { margin-bottom: 32px; }
  .site-header nav a:first-child { display: none; }
  .results-heading, .adhoc-status { align-items: flex-start; flex-direction: column; }
  .adhoc-status strong { text-align: left; }
  .details { grid-template-columns: 1fr; }
  .details div { padding-top: 15px; }
  .tool-card { grid-template-columns: 42px 1fr; }
  .tool-card .arrow { display: none; }
}