:root {
  --bg: #f4f6f3;
  --card: #ffffff;
  --text: #17191c;
  --muted: #6b7280;
  --line: #e3e7e0;
  --bike: #0f7a4a;
  --accent: #111827;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.wrap {
  max-width: 980px;
  margin: 0 auto;
  padding: 20px 18px 48px;
}

.top {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 22px;
  font-size: 14px;
}

.top a {
  color: var(--muted);
  text-decoration: none;
}

.top a:hover { color: var(--text); }

.hero {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 28px 28px 24px;
  margin-bottom: 18px;
}

.eyebrow {
  margin: 0 0 16px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--bike);
}

.hero-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.hero-pair .k {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 6px;
}

.hero-num {
  margin: 0;
  font-size: clamp(36px, 6vw, 56px);
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 0.95;
}

.hero-pair .after .hero-num { color: var(--bike); }

h1 {
  font-size: clamp(20px, 3vw, 28px);
  line-height: 1.25;
  margin: 18px 0 0;
  letter-spacing: -0.03em;
  max-width: 36ch;
}

.sub {
  color: var(--muted);
  max-width: 52ch;
  line-height: 1.5;
  margin: 12px 0 0;
}

.irs-note {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.45;
  color: var(--muted);
}

.irs-note b { color: var(--text); }

.grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 18px;
}

.panel,
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
}

.panel { padding: 18px; }
.results { display: grid; gap: 18px; }

.section + .section {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.section h3 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0 0 12px;
}

.slide {
  display: grid;
  gap: 7px;
  margin: 14px 0;
  font-size: 14px;
}

.slide span {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.slide strong { font-variant-numeric: tabular-nums; }

input[type="range"] {
  width: 100%;
  accent-color: var(--bike);
}

.presets {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 7px;
  margin: 4px 0 10px;
}

.presets button {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 9px;
  padding: 8px 4px;
  cursor: pointer;
  font: inherit;
  font-size: 13px;
}

.presets button.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.swap,
.horizon,
.permile { padding: 22px; }

.horizon .v {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  letter-spacing: -0.04em;
}

.horizon .v.dark { color: var(--text); }

.lead-break {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.4;
}

.break {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.break li {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}

.break b { font-variant-numeric: tabular-nums; }
.break .car { color: var(--text); }
.break .bike { color: var(--bike); }

.break.nest {
  margin-top: 8px;
  border-top: 0;
}

.break.nest li {
  padding: 6px 0;
  font-size: 13px;
  color: var(--muted);
  border-bottom-color: var(--line);
}

.break.nest b {
  color: var(--text);
  font-weight: 600;
}

h2 {
  font-size: 16px;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}

.beforeafter {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.ba .k {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 8px;
}

.ba .v {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  letter-spacing: -0.04em;
}

.ba.after .v { color: var(--bike); }

.hint {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.45;
  margin: 16px 0 0;
}

.back {
  margin: 28px 0 0;
  font-size: 15px;
}

.back a { color: var(--bike); }

.sources {
  margin-top: 28px;
  padding-top: 8px;
}

.sources h2 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 10px;
}

.sources p,
.sources li {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
}

.sources p { margin: 0 0 12px; max-width: 72ch; }

.sources ul {
  margin: 0;
  padding: 0 0 0 18px;
  display: grid;
  gap: 8px;
  max-width: 78ch;
}

.sources b { color: var(--text); font-weight: 600; }

.sources a { color: var(--bike); }

@media (max-width: 800px) {
  .grid,
  .hero-pair,
  .beforeafter { grid-template-columns: 1fr; }

  h1 { max-width: none; }
}