:root {
  color-scheme: dark;
  --page: #101411;
  --panel: #1b1b18;
  --panel-warm: #272019;
  --line: #3d463e;
  --warm-line: #70513c;
  --ink: #f1e4d4;
  --muted: #b9aca0;
  --quiet: #829080;
  --peach: #edc49f;
  --mint: #cad9bb;
  --danger: #ffb5a6;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; background: radial-gradient(circle at 84% 3%, #2a221b 0, transparent 29rem), var(--page); color: var(--ink); }
.site-header, main, footer { width: min(1100px, calc(100% - 40px)); margin-inline: auto; }
.site-header { min-height: 77px; display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--line); color: var(--quiet); font: 11px/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .09em; }
.brand { color: var(--ink); text-decoration: none; font-weight: 600; }
.brand span { color: var(--peach); padding-inline: 5px; }
.site-header p { margin: 0; }
main { padding: 86px 0 52px; }
.intro { max-width: 760px; margin-bottom: 52px; }
.eyebrow, .number { color: var(--peach); font: 10px/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .12em; margin: 0 0 10px; }
h1, h2 { margin: 0; font-family: Georgia, serif; font-weight: 500; }
h1 { max-width: 720px; font-size: clamp(43px, 6vw, 71px); letter-spacing: -.055em; line-height: .98; }
h2 { font-size: clamp(25px, 3vw, 34px); letter-spacing: -.035em; line-height: 1.08; }
.lede { max-width: 720px; margin: 24px 0 0; color: var(--muted); font-size: 18px; line-height: 1.6; }

.calculator-card, .summary-card, .method-note { border: 1px solid var(--line); border-radius: 15px; background: linear-gradient(135deg, rgba(255,255,255,.02), transparent 60%), var(--panel); }
.calculator-card { padding: clamp(23px, 4vw, 35px); }
.purpose-card { border-color: var(--warm-line); background: linear-gradient(135deg, rgba(237,196,159,.06), transparent 54%), var(--panel-warm); }
.route-card { margin-top: 22px; }
.section-heading { display: flex; gap: 17px; align-items: flex-start; margin-bottom: 27px; }
.number { width: 22px; padding-top: 5px; color: #acc596; }
.section-heading .eyebrow { color: var(--muted); }
label { display: grid; gap: 8px; color: var(--muted); font-size: 13px; font-weight: 600; line-height: 1.3; }
input, select { width: 100%; min-height: 50px; padding: 11px 13px; border: 1px solid #505148; border-radius: 8px; background: rgba(8,10,8,.36); color: var(--ink); font: 15px ui-monospace, SFMono-Regular, Menlo, monospace; outline: none; }
input:focus, select:focus { border-color: var(--peach); box-shadow: 0 0 0 3px rgba(237,196,159,.17); }
.purpose-select { max-width: 460px; }
.service-fields { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 17px; margin-top: 22px; }
.helper { max-width: 760px; margin: 0 0 25px; color: var(--muted); font-size: 13px; line-height: 1.55; }
.route-heading { display: flex; justify-content: space-between; gap: 22px; align-items: flex-start; }
.route-actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.section-count { color: var(--mint); margin: 0; font: 12px ui-monospace, SFMono-Regular, Menlo, monospace; }
button { min-height: 43px; border: 1px solid #7b6049; border-radius: 8px; padding: 9px 13px; background: rgba(237,196,159,.12); color: var(--ink); font: 600 13px system-ui, sans-serif; cursor: pointer; }
button:hover { border-color: var(--peach); background: rgba(237,196,159,.19); }
button:focus-visible { outline: 3px solid rgba(237,196,159,.45); outline-offset: 2px; }
button[disabled] { cursor: not-allowed; opacity: .45; }
.sections { display: grid; gap: 15px; }
.section-card { margin: 0; padding: 20px; border: 1px solid #454b43; border-radius: 11px; background: rgba(0,0,0,.11); }
.section-card legend { padding: 0 8px; color: var(--ink); font: 500 18px Georgia, serif; }
.section-grid { display: grid; grid-template-columns: 1.2fr repeat(4, minmax(125px, 1fr)) auto; gap: 14px; align-items: end; }
.field-note { align-self: end; margin: 0; padding: 11px 13px; border: 1px solid #4d554a; border-radius: 8px; background: rgba(202,217,187,.06); color: var(--mint); font-size: 12px; line-height: 1.45; }
.remove-section { min-width: 43px; color: var(--muted); background: transparent; border-color: #4d514c; }
.remove-section:hover { color: var(--danger); border-color: #a96c60; background: rgba(169,108,96,.1); }

.summary-card { display: grid; grid-template-columns: minmax(220px, .85fr) minmax(0, 1.4fr); gap: 26px; align-items: start; margin-top: 22px; padding: clamp(23px, 3vw, 31px); }
.summary-card h2 { font-size: 26px; }
.route-result { display: grid; gap: 8px; padding: 22px; border: 1px solid #72523c; border-radius: 11px; background: rgba(16,14,12,.45); color: var(--muted); font-size: 13px; line-height: 1.45; }
.route-result strong { color: var(--peach); font: 500 clamp(34px, 4vw, 50px)/1 Georgia, serif; letter-spacing: -.055em; }
.route-result .pass { color: var(--mint); }
.route-result .warning { color: #ffd08c; }
.section-results { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.section-result { padding: 15px; border-radius: 9px; border: 1px solid #41453d; background: rgba(0,0,0,.12); color: var(--muted); font-size: 13px; line-height: 1.5; }
.section-result strong { display: block; margin-bottom: 5px; color: var(--ink); font-family: Georgia, serif; font-size: 18px; font-weight: 500; }
.method-note { margin-top: 22px; padding: 28px clamp(23px, 4vw, 35px); }
.method-note h2 { font-size: 25px; }
.method-note p { max-width: 860px; margin: 14px 0 0; color: var(--muted); font-size: 14px; line-height: 1.6; }
.method-note ul { margin: 14px 0 0; padding-left: 19px; color: var(--muted); font-size: 14px; line-height: 1.6; }
.error-message { position: sticky; bottom: 18px; margin: 18px 0 0; padding: 13px 16px; border: 1px solid #a96c60; border-radius: 8px; background: #321d1a; color: var(--danger); }
footer { padding: 28px 0 44px; border-top: 1px solid var(--line); color: var(--quiet); font-size: 12px; line-height: 1.5; }

@media (max-width: 880px) {
  .section-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .section-grid label:first-child { grid-column: span 2; }
  .remove-section { grid-column: 3; }
}
@media (max-width: 760px) {
  .site-header, main, footer { width: min(100% - 28px, 1100px); }
  .site-header { min-height: 64px; }
  .site-header p { display: none; }
  main { padding-top: 50px; }
  .intro { margin-bottom: 36px; }
  .lede { font-size: 16px; }
  .service-fields, .section-grid, .summary-card, .section-results { grid-template-columns: 1fr; }
  .section-grid label:first-child, .remove-section { grid-column: auto; }
  .route-heading { display: block; }
  .route-actions { justify-content: space-between; margin: -6px 0 23px 39px; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } }