/* Look and feel follows runfibre.co.uk: Bootstrap 4 metrics, RunFibre greens,
   Open Sans body text, Oswald headings. Fonts are self-hosted (no CDN). */
@font-face {
  font-family: "Open Sans";
  font-style: normal;
  font-weight: 300 800;
  font-display: swap;
  src: url("/static/fonts/OpenSans-latin.woff2") format("woff2");
}
@font-face {
  font-family: "Oswald";
  font-style: normal;
  font-weight: 200 700;
  font-display: swap;
  src: url("/static/fonts/Oswald-latin.woff2") format("woff2");
}

:root {
  --primary: #81a966;
  --primary-dark: #5f8943;
  --light: #dce5e1;
  --dark: #33443c;
  --text: #3b3f3b;
  --muted: #6c757d;
  --border: #ced4da;
  --focus-ring: rgba(129, 169, 102, .35);
  --danger-bg: #f8d7da;
  --danger-border: #f5c6cb;
  --danger-text: #721c24;
  --shadow: 0 .5rem 1rem rgba(0, 0, 0, .15);
  --heading: "Oswald", "Arial Narrow", sans-serif;
  --body: "Open Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: #fff;
  color: var(--text);
  font: 400 1rem/1.5 var(--body);
}
h1 { font-family: var(--heading); font-weight: 700; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.container { width: 100%; max-width: 720px; margin: 0 auto; padding: 0 16px; }

/* Navbar */
.navbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: .5rem 1rem;
  background: var(--primary);
  box-shadow: var(--shadow);
}
.brand { display: flex; align-items: center; gap: .5rem; text-decoration: none; color: #fff; }
.brand-mark { width: 40px; height: 40px; fill: var(--dark); }
.brand-name { font: 700 1.5rem/1 var(--heading); letter-spacing: .01em; }
.nav-label { color: #fff; font-weight: 700; }

/* Hero */
.hero {
  background: var(--dark) linear-gradient(180deg, var(--dark) 0%, #2a3831 100%);
  color: #fff;
  padding: 3rem 0 6rem;
  text-align: center;
}
.hero h1 { margin: 0 0 .25rem; font-size: 2.5rem; line-height: 1.2; letter-spacing: .02em; }
.hero-sub { margin: 0 0 1.5rem; color: var(--light); font-size: 1.1rem; }
.search { max-width: 520px; margin: 0 auto; }

/* Form controls (Bootstrap 4 metrics) */
.form-control {
  display: block; width: 100%;
  padding: .375rem .75rem;
  font: inherit; color: #495057;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: .25rem;
  transition: border-color .15s, box-shadow .15s;
}
.form-control:focus {
  outline: 0;
  border-color: var(--primary);
  box-shadow: 0 0 0 .2rem var(--focus-ring);
}
select.form-control {
  height: calc(1.5em + .75rem + 2px);
  padding-right: 2rem;
  appearance: none;
  background: #fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%2333443c'/%3E%3C/svg%3E") no-repeat right .75rem center;
  cursor: pointer;
}
.hinput {
  font-family: var(--heading);
  font-size: 1.5rem;
  text-transform: uppercase;
  text-align: left;
}
.hinput::placeholder { text-transform: none; color: #8a938e; }
.input-group { display: flex; }
.input-group .form-control { flex: 1 1 auto; min-width: 0; border-radius: .25rem 0 0 .25rem; }
.input-group .btn { border-radius: 0 .25rem .25rem 0; white-space: nowrap; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  padding: .375rem .75rem;
  font: 700 1rem/1.5 var(--body);
  border: 1px solid transparent;
  border-radius: .25rem;
  cursor: pointer;
  transition: background-color .15s, border-color .15s, color .15s, box-shadow .15s;
}
.btn:focus-visible { outline: 0; box-shadow: 0 0 0 .2rem var(--focus-ring); }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); }
.btn-primary:disabled { background: var(--primary); border-color: var(--primary); opacity: .65; cursor: progress; }
.search .btn { padding: 0 1.25rem; font-family: var(--heading); font-size: 1.25rem; font-weight: 400; text-transform: uppercase; }
.btn-outline-primary { background: transparent; border-color: var(--primary); color: var(--primary-dark); }
.btn-outline-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: #fff; }

/* Card (overlaps the hero like the site's postcode card) */
.main { flex: 1 0 auto; margin-top: -4rem; margin-bottom: 3rem; }
.card {
  background: #fff;
  border: 1px solid rgba(0, 0, 0, .125);
  border-radius: .25rem;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.card-header {
  padding: .75rem 1.25rem;
  background: var(--dark);
  color: var(--light);
  font-weight: 700;
  text-transform: uppercase;
}
.card-body { padding: 1.25rem; }
.hint { margin: 0; color: var(--muted); }
.field-label { display: block; margin-bottom: .5rem; font-weight: 700; }

/* Messages (Bootstrap alert style) */
.alert {
  margin: 0 0 1rem;
  padding: .75rem 1.25rem;
  border: 1px solid transparent;
  border-radius: .25rem;
  background: var(--light);
  border-color: #c9d6d0;
  color: var(--dark);
}
.alert.error { background: var(--danger-bg); border-color: var(--danger-border); color: var(--danger-text); }

/* UPRN result */
.uprn-panel { margin-top: 1.5rem; padding-top: 1.25rem; border-top: 2px solid var(--light); }
.section-title { font: 700 1.5rem/1.2 var(--heading); color: var(--dark); }
.uprn-row { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem 1rem; margin-top: .25rem; }
.uprn-value {
  font: 700 2.75rem/1.1 var(--heading);
  color: var(--primary-dark);
  letter-spacing: .03em;
  font-variant-numeric: tabular-nums;
  user-select: all;
  overflow-wrap: anywhere;
}
.copy-feedback { font-weight: 700; color: var(--primary-dark); }
.copy-feedback.warn { color: var(--danger-text); font-weight: 400; }
.uprn-address { margin-top: .5rem; color: var(--muted); }

/* Footer */
.footer {
  background: var(--dark);
  color: var(--light);
  padding: 1.25rem 0;
  font-size: .8rem;
  text-align: center;
}

@media (max-width: 576px) {
  .hero { padding: 2rem 0 5rem; }
  .hero h1 { font-size: 2rem; }
  .input-group { flex-direction: column; gap: .5rem; }
  .input-group .form-control, .input-group .btn { border-radius: .25rem; }
  .search .btn { padding: .375rem 1rem; }
  .uprn-value { font-size: 2.25rem; }
}