/* Crow Flies — a single-purpose distance readout.
   Palette: warm paper / ink, with a rust accent for the measured value. */

:root {
  color-scheme: light dark;

  --paper: #f6f3ec;
  --paper-raised: #fffdf8;
  --ink: #1d1a16;
  --ink-soft: #5d564c;
  --ink-faint: #8a8277;
  --rule: #e0d9cc;
  --accent: #b4441f;
  --accent-soft: #f3e2d9;
  --danger: #9a2622;

  --radius: 14px;
  --shadow: 0 1px 2px rgb(29 26 22 / 6%), 0 12px 28px -18px rgb(29 26 22 / 45%);
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #14120f;
    --paper-raised: #1e1b17;
    --ink: #f1ece3;
    --ink-soft: #b3aa9c;
    --ink-faint: #837b6f;
    --rule: #322d26;
    --accent: #e8794b;
    --accent-soft: #2e201a;
    --danger: #e8736c;
    --shadow: 0 1px 2px rgb(0 0 0 / 40%), 0 16px 32px -20px rgb(0 0 0 / 80%);
  }
}

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  padding: clamp(1.5rem, 5vw, 4rem) 1.25rem 2rem;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-text-size-adjust: 100%;
}

.shell {
  max-width: 46rem;
  margin-inline: auto;
}

/* ---------- masthead ---------- */

.eyebrow {
  margin: 0 0 .35rem;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
}

h1 {
  margin: 0 0 .5rem;
  font-size: clamp(1.75rem, 5.5vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -.02em;
  font-weight: 640;
}

h1 .ref {
  /* `clone` keeps the underline on every wrapped line and lets the sentence's
     punctuation stay on the same line as the last word. */
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
  border-bottom: 3px solid var(--accent-soft);
}

.sub {
  margin: 0;
  max-width: 34rem;
  color: var(--ink-soft);
  font-size: .95rem;
}

/* ---------- form ---------- */

.finder { margin: 2rem 0 1.5rem; }

.field {
  display: flex;
  gap: .5rem;
  align-items: stretch;
}

input[type="text"] {
  flex: 1 1 auto;
  min-width: 0;
  padding: .8rem 1rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--paper-raised);
  color: var(--ink);
  font: inherit;
  box-shadow: var(--shadow);
  transition: border-color .15s ease, box-shadow .15s ease;
}

input[type="text"]::placeholder { color: var(--ink-faint); }

input[type="text"]:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

input[type="text"]:focus { border-color: var(--accent); }

button[type="submit"] {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .8rem 1.4rem;
  border: 0;
  border-radius: var(--radius);
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: filter .15s ease, transform .06s ease;
}

button[type="submit"]:hover { filter: brightness(1.08); }
button[type="submit"]:active { transform: translateY(1px); }
button[type="submit"][disabled] { opacity: .65; cursor: progress; }

.assists {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .5rem 1rem;
  margin-top: .7rem;
}

.ghost {
  padding: .2rem 0;
  border: 0;
  background: none;
  color: var(--accent);
  font: inherit;
  font-size: .875rem;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 1px solid currentcolor;
}

.ghost[disabled] { color: var(--ink-faint); cursor: progress; }

.hint {
  flex: 1 1 16rem;
  min-width: 0;
  color: var(--ink-faint);
  font-size: .8rem;
}

.hint code {
  font-family: var(--mono);
  font-size: .95em;
  white-space: nowrap;
}

/* htmx toggles .htmx-request on the indicator while a request is in flight. */
.spinner {
  display: none;
  width: 1em;
  height: 1em;
  border: 2px solid rgb(255 255 255 / 45%);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .7s linear infinite;
}

.spinner.htmx-request { display: inline-block; }

@keyframes spin { to { transform: rotate(360deg); } }

@media (prefers-reduced-motion: reduce) {
  .spinner { animation-duration: 2s; }
  .card { animation: none; }
}

/* ---------- result ---------- */

.card {
  padding: 1.5rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--paper-raised);
  box-shadow: var(--shadow);
  animation: rise .22s ease-out;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: none; }
}

.card-error {
  border-color: color-mix(in srgb, var(--danger) 45%, var(--rule));
}

.card-error h2 {
  margin: 0 0 .35rem;
  font-size: 1rem;
  color: var(--danger);
}

.card-error p { margin: 0; color: var(--ink-soft); }

.readout-label {
  margin: 0;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.readout {
  margin: .1rem 0 .6rem;
  display: flex;
  align-items: baseline;
  gap: .5rem;
  flex-wrap: wrap;
}

.readout .value {
  font-size: clamp(2.75rem, 11vw, 4rem);
  font-weight: 680;
  line-height: 1;
  letter-spacing: -.035em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.readout .unit {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink-soft);
}

.alt-units {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem 1.25rem;
  margin: 0 0 1.25rem;
  padding: 0 0 1.25rem;
  border-bottom: 1px solid var(--rule);
  list-style: none;
  color: var(--ink-soft);
  font-size: .9rem;
}

.alt-units strong {
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.legs { margin: 0; display: grid; gap: 1rem; }

.legs dt {
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.legs dd {
  margin: .15rem 0 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .3rem .75rem;
}

.legs .place { font-weight: 560; }

.legs .coords {
  font-family: var(--mono);
  font-size: .82rem;
  color: var(--ink-soft);
}

/* ---------- links & footer ---------- */

a { color: inherit; text-decoration-color: var(--ink-faint); text-underline-offset: 2px; }
a:hover { text-decoration-color: var(--accent); }

.colophon {
  display: grid;
  gap: .25rem;
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
  color: var(--ink-faint);
  font-size: .78rem;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}