:root {
  color-scheme: dark;
  --ink: #f4f7f4;
  --muted: #aeb9b3;
  --surface: #111814;
  --surface-raised: #18211c;
  --line: #344139;
  --signal: #bbff52;
  --signal-ink: #10150f;
  --danger: #ffaaa0;
  --focus: #8dd8ff;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  background: radial-gradient(circle at 85% 0%, #24352a 0, #0b100d 36rem);
  color: var(--ink);
}

main {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 4rem 0 6rem;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 10;
  padding: 0.7rem 1rem;
  background: var(--focus);
  color: #071015;
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: translateY(0);
}

.page-header {
  max-width: 760px;
  margin-bottom: 2.5rem;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--signal);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 1rem;
  font-size: clamp(2.4rem, 7vw, 5.6rem);
  line-height: 0.95;
  letter-spacing: -0.055em;
}

.lede {
  max-width: 680px;
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1.6;
}

.calculator-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 1.25rem;
  align-items: start;
}

.controls-panel,
.results-panel {
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  box-shadow: 0 1.5rem 4rem rgb(0 0 0 / 24%);
}

.controls-panel {
  padding: clamp(1.25rem, 4vw, 2.25rem);
}

.results-panel {
  position: sticky;
  top: 1rem;
  padding: 1.5rem;
  background: var(--surface-raised);
}

.privacy-note,
.disclaimer,
.copy-status {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

fieldset {
  margin: 1.5rem 0 0;
  padding: 0;
  border: 0;
}

legend {
  margin-bottom: 0.9rem;
  font-size: 1rem;
  font-weight: 750;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.field {
  display: grid;
  gap: 0.35rem;
}

label {
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 650;
}

input,
select,
button,
a {
  font: inherit;
}

input,
select {
  width: 100%;
  min-height: 2.9rem;
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  background: #0c120e;
  color: var(--ink);
  padding: 0.7rem 0.8rem;
}

input:focus-visible,
select:focus-visible,
button:focus-visible,
a:focus-visible,
.results-panel:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.button {
  display: inline-flex;
  min-height: 2.9rem;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.7rem 1rem;
  font-weight: 760;
  text-decoration: none;
  cursor: pointer;
}

.button-primary {
  background: var(--signal);
  color: var(--signal-ink);
}

.button-secondary {
  border-color: var(--line);
  background: transparent;
  color: var(--ink);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.42;
}

.error {
  min-height: 1.4rem;
  margin: 1rem 0 0;
  color: var(--danger);
  font-weight: 650;
}

.copy-status {
  min-height: 1.3rem;
  margin-bottom: 0;
}

.headline-result {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin: 1rem 0 1.5rem;
}

.headline-result > div,
.route-card {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.85rem;
  background: #0d140f;
}

.result-label {
  display: block;
  margin-bottom: 0.3rem;
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.headline-result strong {
  font-size: 1.35rem;
  text-transform: capitalize;
}

.result-section {
  padding: 1.1rem 0;
  border-top: 1px solid var(--line);
}

.result-section h3 {
  font-size: 1rem;
}

ol,
ul {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

li + li {
  margin-top: 0.6rem;
}

.route-card {
  margin-top: 0.5rem;
}

.route-card p {
  color: var(--muted);
}

.disclaimer {
  margin: 1rem 0 0;
}

[hidden] {
  display: none !important;
}

@media (max-width: 820px) {
  main {
    padding-top: 2.5rem;
  }

  .calculator-shell {
    grid-template-columns: 1fr;
  }

  .results-panel {
    position: static;
  }
}

@media (max-width: 560px) {
  .field-grid,
  .headline-result {
    grid-template-columns: 1fr;
  }

  .button-row,
  .button {
    width: 100%;
  }
}

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

@media print {
  :root {
    color-scheme: light;
  }

  body {
    background: #fff;
    color: #000;
  }

  main {
    width: 100%;
    padding: 0;
  }

  .skip-link,
  .controls-panel,
  .route-card .button,
  noscript {
    display: none !important;
  }

  .calculator-shell {
    display: block;
  }

  .results-panel {
    position: static;
    border: 0;
    box-shadow: none;
    background: #fff;
    color: #000;
  }

  .headline-result > div,
  .route-card {
    border-color: #777;
    background: #fff;
  }

  .result-label,
  .result-section,
  .disclaimer,
  ol,
  ul,
  .route-card p {
    color: #222;
  }
}