:root {
  color: #18231d;
  background: #f4f1e9;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  --ink: #18231d;
  --muted: #657068;
  --paper: #fffdf8;
  --line: #d9d7cd;
  --accent: #0d6b4f;
  --accent-dark: #084936;
  --warn-bg: #fff1ce;
  --warn-ink: #694800;
}

* { box-sizing: border-box; }
body { margin: 0; min-width: 18rem; background: radial-gradient(circle at top left, #e4efe7 0, transparent 28rem), #f4f1e9; }
a { color: var(--accent-dark); text-underline-offset: .18em; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: .2rem solid #df7b32; outline-offset: .2rem; }

.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 5; padding: .8rem 1rem; background: var(--ink); color: white; }
.skip-link:focus { top: 1rem; }
.site-header { max-width: 74rem; margin: 0 auto; padding: 1.2rem clamp(1rem, 4vw, 3rem); display: flex; justify-content: space-between; align-items: center; }
.brand { display: inline-flex; align-items: center; gap: .65rem; color: var(--ink); font-weight: 760; text-decoration: none; letter-spacing: -.02em; }
.brand-mark { display: grid; place-items: center; width: 2rem; height: 2rem; border-radius: .65rem; color: white; background: var(--accent); }
.quiet-button { border: 0; background: transparent; color: var(--muted); padding: .55rem; cursor: pointer; }
main { width: min(68rem, calc(100% - 2rem)); margin: 2rem auto 5rem; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 15ch; font-size: clamp(2.25rem, 7vw, 4.8rem); line-height: .98; letter-spacing: -.055em; }
h2 { font-size: clamp(1.45rem, 3vw, 2.1rem); letter-spacing: -.03em; }
.eyebrow { margin-bottom: .55rem; color: var(--accent); font-size: .75rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.lede { max-width: 40rem; color: var(--muted); font-size: clamp(1rem, 2vw, 1.2rem); line-height: 1.55; }

.ledger-heading { display: flex; gap: 2rem; justify-content: space-between; align-items: end; padding: clamp(2rem, 6vw, 5rem) 0 3rem; }
.vehicle-switcher { display: flex; flex-wrap: wrap; gap: .4rem; padding: .35rem; background: #e7e4da; border-radius: .8rem; }
.vehicle-switcher a { padding: .55rem .8rem; border-radius: .55rem; text-decoration: none; }
.vehicle-switcher a[aria-current="page"] { background: var(--paper); box-shadow: 0 .1rem .3rem #18231d18; }
.section-title { display: flex; justify-content: space-between; align-items: end; border-bottom: 1px solid var(--line); margin-bottom: 1rem; }
.count-label { color: var(--muted); padding-bottom: 1rem; }
.trip-list { list-style: none; margin: 0; padding: 0; display: grid; gap: .7rem; }
.trip-card { display: grid; grid-template-columns: minmax(14rem, 1.4fr) minmax(7rem, .45fr) minmax(16rem, 1fr); grid-template-areas: "time distance route" "integrity integrity integrity"; gap: .8rem 1.5rem; min-height: 7rem; padding: 1.25rem; border: 1px solid transparent; border-radius: 1rem; background: var(--paper); color: var(--ink); text-decoration: none; box-shadow: 0 .25rem 1rem #20372b0b; transition: border-color .16s ease, transform .16s ease; }
.trip-card:hover { border-color: #9ab5a7; transform: translateY(-1px); }
.trip-time { grid-area: time; display: flex; align-items: center; gap: .5rem; font-weight: 680; }
.trip-distance { grid-area: distance; font-size: 1.35rem; font-weight: 780; letter-spacing: -.03em; }
.trip-route { grid-area: route; display: grid; grid-template-columns: 1fr auto 1fr; gap: .5rem; color: var(--muted); font-size: .9rem; }
.integrity-list { grid-area: integrity; display: flex; flex-wrap: wrap; gap: .4rem; }
.integrity-chip, .observed-chip { display: inline-flex; width: fit-content; padding: .3rem .55rem; border-radius: 999px; font-size: .78rem; font-weight: 720; }
.integrity-chip { background: var(--warn-bg); color: var(--warn-ink); }
.observed-chip { grid-area: integrity; color: var(--accent-dark); background: #e3f1e9; }
.load-more { display: block; width: fit-content; margin: 1.5rem auto; padding: .8rem 1.1rem; border: 1px solid var(--accent); border-radius: .7rem; font-weight: 720; text-decoration: none; }

.auth-card, .empty-panel, .error-panel { max-width: 42rem; margin: clamp(3rem, 12vh, 8rem) auto; padding: clamp(1.5rem, 5vw, 3rem); border: 1px solid var(--line); border-radius: 1.2rem; background: var(--paper); }
.auth-card h1 { font-size: clamp(2rem, 6vw, 3.8rem); }
.login-form { display: grid; gap: .7rem; margin-top: 2rem; }
.login-form label { font-weight: 720; }
.login-form input { width: 100%; border: 1px solid #9b9e98; border-radius: .65rem; padding: .85rem 1rem; background: white; }
.primary-button { width: fit-content; margin-top: .4rem; border: 0; border-radius: .65rem; padding: .85rem 1.1rem; color: white; background: var(--accent); font-weight: 760; cursor: pointer; }
.primary-button:hover { background: var(--accent-dark); }
.connect-form { margin-top: 1.5rem; }
.integration-status { width: fit-content; margin: 1.5rem 0 0; padding: .35rem .65rem; border-radius: 999px; color: var(--ink); background: #e7e4da; font-size: .85rem; font-weight: 720; }
.pairing-step { max-width: 35rem; margin-top: 1rem; color: var(--muted); line-height: 1.5; }
.pairing-action { display: inline-block; text-decoration: none; }
.error-panel { border-color: #d99d86; background: #fff5ef; }

.back-nav { margin: 2rem 0 3rem; }
.detail-distance { margin: 1.5rem 0 2.5rem; font-size: clamp(2rem, 6vw, 4rem); font-weight: 800; color: var(--accent-dark); letter-spacing: -.05em; }
.fact-grid, .endpoint-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .8rem; margin: 0 0 2.5rem; }
.fact-grid > div, .endpoint-grid > div { padding: 1.15rem; border: 1px solid var(--line); border-radius: .9rem; background: var(--paper); }
.fact-grid dt { color: var(--muted); font-size: .8rem; font-weight: 750; text-transform: uppercase; letter-spacing: .08em; }
.fact-grid dd { margin: .5rem 0 0; font-size: 1.08rem; font-weight: 680; }
.privacy-note { color: var(--muted); font-size: .9rem; }
.detail-integrity { padding-left: 1.2rem; }
.detail-integrity li { margin-bottom: .55rem; }
.loading-status { position: fixed; right: 1rem; bottom: 1rem; padding: .7rem 1rem; border-radius: 999px; color: white; background: var(--ink); }

@media (max-width: 46rem) {
  main { margin-top: .5rem; }
  .site-header { padding-inline: 1rem; }
  .ledger-heading { align-items: start; flex-direction: column; padding-top: 2.5rem; }
  .trip-card { grid-template-columns: 1fr auto; grid-template-areas: "time distance" "route route" "integrity integrity"; gap: .9rem; }
  .trip-time { align-items: start; flex-direction: column; }
  .trip-time [aria-hidden="true"] { display: none; }
  .trip-route { font-size: .84rem; }
  .fact-grid, .endpoint-grid { grid-template-columns: 1fr; }
}

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