/* =====================================================================
   Fuse Connectivity Checker — application stylesheet
   Brand-aligned with fusemediagroup.co.uk
   ===================================================================== */

:root {
  --fuse-primary: #0a3d62;
  --fuse-primary-dark: #062a44;
  --fuse-accent: #1e88e5;
  --fuse-grey-100: #f5f7fa;
  --fuse-grey-200: #e8ecf1;
  --fuse-grey-400: #b8c2cc;
  --fuse-grey-700: #4a5568;
  --fuse-grey-900: #1a202c;
  --fuse-success: #2f855a;
  --fuse-warning: #c05621;
  --fuse-error: #c53030;
  --fuse-radius: 6px;
  --fuse-shadow: 0 2px 8px rgba(10, 61, 98, 0.08);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--fuse-grey-900);
  background: #fff;
  line-height: 1.5;
}

a { color: var(--fuse-primary); }
a:hover { color: var(--fuse-primary-dark); }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); border: 0;
}

.small { font-size: 0.875rem; color: var(--fuse-grey-700); }

/* --- Header ----------------------------------------------------- */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--fuse-grey-200);
  padding: 14px 0;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  text-decoration: none;
  color: var(--fuse-primary);
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-mark {
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
}
.brand-divider {
  width: 1px; height: 24px;
  background: var(--fuse-grey-400);
}
.brand-product {
  font-weight: 600;
  font-size: 1rem;
  color: var(--fuse-grey-700);
}
.header-nav {
  display: flex;
  gap: 24px;
  font-size: 0.95rem;
}
.header-nav a {
  text-decoration: none;
  color: var(--fuse-grey-700);
  font-weight: 500;
}
.header-nav a:hover { color: var(--fuse-primary); }

/* --- Hero ------------------------------------------------------- */
.hero {
  background: linear-gradient(135deg, var(--fuse-primary) 0%, var(--fuse-primary-dark) 100%);
  color: #fff;
  padding: 60px 0 50px;
}
.hero h1 {
  font-size: 2.25rem;
  font-weight: 700;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
  max-width: 720px;
}
.hero-lede {
  font-size: 1.1rem;
  max-width: 720px;
  margin: 0 0 28px;
  opacity: 0.92;
}
.hero-disclaimer {
  margin-top: 12px;
  color: rgba(255,255,255,0.75);
}
.hero-disclaimer.small { color: rgba(255,255,255,0.75); }

.lookup-form {
  display: flex;
  gap: 8px;
  max-width: 540px;
  background: #fff;
  padding: 6px;
  border-radius: var(--fuse-radius);
  box-shadow: 0 8px 24px rgba(0,0,0,0.18);
}
.lookup-form input {
  flex: 1;
  border: none;
  outline: none;
  padding: 12px 14px;
  font-size: 1rem;
  border-radius: 4px;
  text-transform: uppercase;
}

.btn {
  border: none;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  padding: 12px 22px;
  border-radius: 4px;
  font-family: inherit;
  transition: background 0.15s ease;
}
.btn-primary {
  background: var(--fuse-primary);
  color: #fff;
}
.btn-primary:hover { background: var(--fuse-primary-dark); }
.btn-primary:disabled {
  background: var(--fuse-grey-400);
  cursor: not-allowed;
}
.btn-secondary {
  background: #fff;
  color: var(--fuse-primary);
  border: 1.5px solid var(--fuse-primary);
}
.btn-secondary:hover { background: var(--fuse-grey-100); }

/* --- Results ---------------------------------------------------- */
.results-section {
  padding: 40px 0;
  background: var(--fuse-grey-100);
}
.results-card {
  background: #fff;
  border-radius: var(--fuse-radius);
  padding: 28px;
  margin-bottom: 20px;
  box-shadow: var(--fuse-shadow);
}
.results-card h2 {
  margin: 0 0 16px;
  color: var(--fuse-primary);
  font-size: 1.4rem;
}

.grade-display {
  display: flex;
  gap: 24px;
  align-items: center;
  flex-wrap: wrap;
  padding: 20px;
  border: 2px solid var(--fuse-primary);
  border-radius: var(--fuse-radius);
  background: #fff;
}
.grade-letter {
  font-size: 4.5rem;
  font-weight: 800;
  color: var(--fuse-primary);
  line-height: 1;
  min-width: 90px;
  text-align: center;
}
.grade-info { flex: 1; min-width: 240px; }
.grade-info .score-line {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--fuse-grey-900);
}
.grade-info .blurb {
  margin-top: 6px;
  color: var(--fuse-grey-700);
}

.pillar-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 18px;
}
.pillar {
  border: 1px solid var(--fuse-grey-200);
  border-radius: 4px;
  padding: 14px;
}
.pillar-title { font-weight: 600; color: var(--fuse-grey-900); }
.pillar-label { color: var(--fuse-grey-700); margin-top: 4px; font-size: 0.92rem; }
.pillar-bar {
  margin-top: 8px;
  background: var(--fuse-grey-200);
  height: 6px;
  border-radius: 3px;
  overflow: hidden;
}
.pillar-bar > span {
  display: block;
  background: var(--fuse-primary);
  height: 100%;
}
.pillar-points {
  font-size: 0.85rem;
  color: var(--fuse-grey-700);
  margin-top: 6px;
}

.address-picker {
  margin-top: 20px;
}
.address-picker label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--fuse-grey-900);
}
.address-picker select {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--fuse-grey-400);
  border-radius: 4px;
  font-size: 1rem;
  background: #fff;
}

/* --- Lead form -------------------------------------------------- */
.lead-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 14px; }
.lead-form .full { grid-column: span 2; }
.lead-form label {
  display: block;
  font-weight: 600;
  font-size: 0.92rem;
  margin-bottom: 4px;
  color: var(--fuse-grey-700);
}
.lead-form input[type="text"],
.lead-form input[type="email"],
.lead-form input[type="tel"],
.lead-form input[type="number"],
.lead-form select {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--fuse-grey-400);
  border-radius: 4px;
  font-size: 0.95rem;
  font-family: inherit;
}
.lead-form .checkbox {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.9rem;
}
.lead-form .checkbox input { margin-top: 3px; }

@media (max-width: 600px) {
  .lead-form { grid-template-columns: 1fr; }
  .lead-form .full { grid-column: span 1; }
  .pillar-grid { grid-template-columns: 1fr; }
  .lookup-form { flex-direction: column; }
  .hero h1 { font-size: 1.7rem; }
}

/* --- Recommendation -------------------------------------------- */
.recommendation-box {
  background: var(--fuse-primary);
  color: #fff;
  padding: 22px;
  border-radius: var(--fuse-radius);
  margin-top: 18px;
}
.recommendation-box h3 {
  margin: 0 0 8px;
  color: #fff;
  font-size: 1.2rem;
}
.recommendation-box p { margin: 0 0 12px; opacity: 0.95; }
.recommendation-box .btn { background: #fff; color: var(--fuse-primary); }
.recommendation-box .btn:hover { background: var(--fuse-grey-100); }

.secondary-rec {
  background: var(--fuse-grey-100);
  border-left: 3px solid var(--fuse-primary);
  padding: 12px 16px;
  margin-top: 10px;
  border-radius: 0 4px 4px 0;
}
.secondary-rec strong { color: var(--fuse-primary); }

.ttr-box {
  background: #fff7e0;
  border: 1px solid #f0c060;
  padding: 12px 16px;
  border-radius: 4px;
  margin-top: 16px;
}
.ttr-box strong { color: #8c4f00; }

.alert {
  padding: 12px 16px;
  border-radius: 4px;
  margin: 12px 0;
  font-size: 0.95rem;
}
.alert-error {
  background: #fed7d7;
  border: 1px solid #fc8181;
  color: #742a2a;
}
.alert-success {
  background: #c6f6d5;
  border: 1px solid #68d391;
  color: #1a4731;
}

.spinner {
  display: inline-block;
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: fuseSpin 0.7s linear infinite;
  vertical-align: middle;
  margin-right: 6px;
}
@keyframes fuseSpin { to { transform: rotate(360deg); } }

/* --- Explainer / Trust ----------------------------------------- */
.explainer { padding: 60px 0; background: #fff; }
.explainer h2 { color: var(--fuse-primary); font-size: 1.6rem; margin: 0 0 24px; }
.explainer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.explainer-grid > div {
  padding: 20px;
  background: var(--fuse-grey-100);
  border-radius: var(--fuse-radius);
  border-top: 3px solid var(--fuse-primary);
}
.explainer-grid h3 { color: var(--fuse-primary); margin-top: 0; font-size: 1.05rem; }
.explainer-grid p { margin-bottom: 0; color: var(--fuse-grey-700); }

@media (max-width: 760px) { .explainer-grid { grid-template-columns: 1fr; } }

.trust { background: var(--fuse-grey-100); padding: 40px 0; }
.trust h2 { color: var(--fuse-primary); margin-top: 0; font-size: 1.3rem; }
.trust p { color: var(--fuse-grey-700); margin: 0; max-width: 760px; }

/* --- Footer ----------------------------------------------------- */
.site-footer {
  background: var(--fuse-primary-dark);
  color: rgba(255,255,255,0.85);
  padding: 30px 0 24px;
  font-size: 0.92rem;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 24px;
}
.site-footer a { color: #fff; }
.footer-meta { font-size: 0.85rem; opacity: 0.8; }

@media (max-width: 720px) {
  .footer-inner { grid-template-columns: 1fr; }
  .header-nav { display: none; }
}