/* VIN Check Guide: clean, trustworthy educational LP */
:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --ink: #1a2332;
  --muted: #5a6577;
  --line: #e2e8f0;
  --brand: #1e4d8c;
  --brand-dark: #143560;
  --brand-soft: #e8f0fa;
  --accent: #0d7a5f;
  --accent-hover: #0a634d;
  --warn-bg: #fff8e6;
  --warn-border: #f0d78c;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(26, 35, 50, 0.08), 0 8px 24px rgba(26, 35, 50, 0.06);
  --font: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --max: 720px;
  --wide: 960px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; }

a { color: var(--brand); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--brand-dark); }

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.container-wide {
  width: min(100% - 2rem, var(--wide));
  margin-inline: auto;
}

/* Header */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  padding: 0.85rem 0;
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.logo {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--brand-dark);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo span { color: var(--brand); font-weight: 600; }

.nav {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  font-size: 0.92rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
}

.nav a:hover { color: var(--brand); }

/* Hero */
.hero {
  padding: 2.5rem 0 1.5rem;
}

.hero-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  box-shadow: var(--shadow);
  padding: 2rem 1.75rem;
}

@media (min-width: 640px) {
  .hero-card { padding: 2.5rem 2.25rem; }
}

.badge {
  display: inline-block;
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

h1 {
  margin: 0 0 0.85rem;
  font-size: clamp(1.65rem, 4.5vw, 2.15rem);
  line-height: 1.25;
  letter-spacing: -0.025em;
  color: var(--brand-dark);
}

.lead {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 1.05rem;
}

/* VIN form */
.vin-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.vin-label {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--ink);
}

.vin-row {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

@media (min-width: 560px) {
  .vin-row {
    flex-direction: row;
    align-items: stretch;
  }
}

.vin-input {
  flex: 1;
  padding: 0.9rem 1rem;
  font-size: 1.05rem;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: #fafbfc;
  color: var(--ink);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.vin-input:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(30, 77, 140, 0.15);
  background: #fff;
}

.vin-input::placeholder {
  text-transform: none;
  letter-spacing: 0;
  font-family: var(--font);
  color: #9aa3b2;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.9rem 1.4rem;
  font-size: 1rem;
  font-weight: 650;
  font-family: inherit;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, transform 0.1s;
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--accent);
  color: #fff;
  white-space: nowrap;
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
}

.btn-block { width: 100%; }

.form-hint {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.form-error {
  display: none;
  margin: 0;
  font-size: 0.88rem;
  color: #b42318;
  font-weight: 500;
}

.form-error.visible { display: block; }

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-top: 1.25rem;
  padding-top: 1.15rem;
  border-top: 1px solid var(--line);
  font-size: 0.85rem;
  color: var(--muted);
}

.trust-row span::before {
  content: "✓ ";
  color: var(--accent);
  font-weight: 700;
}

/* Content sections */
.section {
  padding: 1.75rem 0;
}

.section h2 {
  margin: 0 0 0.85rem;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
  color: var(--brand-dark);
}

.section h3 {
  margin: 1.35rem 0 0.5rem;
  font-size: 1.08rem;
  color: var(--ink);
}

.section p { margin: 0 0 1rem; color: var(--ink); }
.section p:last-child { margin-bottom: 0; }

.section ul, .section ol {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
  color: var(--ink);
}

.section li { margin-bottom: 0.45rem; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem 1.35rem;
  margin-bottom: 1rem;
}

.card-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 640px) {
  .card-grid { grid-template-columns: 1fr 1fr; }
}

.card-icon {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 8px;
  background: var(--brand-soft);
  color: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 0.65rem;
}

.card h3 { margin-top: 0; }

.notice {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
  font-size: 0.95rem;
  color: var(--ink);
  margin: 1rem 0;
}

.notice strong { display: block; margin-bottom: 0.35rem; }

.cta-band {
  background: var(--brand-dark);
  color: #e8eef6;
  padding: 2rem 0;
  margin: 1.5rem 0 0;
}

.cta-band h2 {
  color: #fff;
  margin: 0 0 0.5rem;
  font-size: 1.3rem;
}

.cta-band p {
  margin: 0 0 1.15rem;
  color: #c5d0e0;
  font-size: 0.98rem;
}

.cta-band .btn-primary {
  background: var(--accent);
}

/* Legal / secondary pages */
.page-main {
  padding: 2rem 0 3rem;
}

.page-main h1 {
  font-size: 1.75rem;
  margin-bottom: 0.35rem;
}

.page-meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.prose {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
}

.prose h2 {
  font-size: 1.15rem;
  margin: 1.5rem 0 0.55rem;
  color: var(--brand-dark);
}

.prose h2:first-child { margin-top: 0; }

.prose p, .prose li {
  font-size: 0.98rem;
  color: var(--ink);
}

.prose ul { padding-left: 1.2rem; }

/* Footer */
.site-footer {
  background: #121a26;
  color: #a8b3c4;
  padding: 2rem 0 1.5rem;
  margin-top: 2rem;
  font-size: 0.88rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.footer-brand {
  color: #fff;
  font-weight: 650;
  font-size: 1rem;
  margin-bottom: 0.35rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
}

.footer-links a {
  color: #c5d0e0;
  text-decoration: none;
}

.footer-links a:hover { color: #fff; }

.footer-disclosure {
  border-top: 1px solid #2a3548;
  padding-top: 1rem;
  font-size: 0.8rem;
  line-height: 1.5;
  color: #8a96a8;
}

.footer-copy {
  margin: 0;
  font-size: 0.8rem;
  color: #6b7789;
}

/* Anchor offset for sticky header */
#vin-form, #how-to, #what-you-get, #decode, #lookup, #guides { scroll-margin-top: 84px; }

/* Blog */
.breadcrumb {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.9rem;
}

.breadcrumb a { color: var(--muted); }

.article-body h2 {
  font-size: 1.2rem;
  margin: 1.85rem 0 0.6rem;
}

.article-body h3 {
  font-size: 1.02rem;
  margin: 1.25rem 0 0.4rem;
  color: var(--ink);
}

.article-body p, .article-body li { font-size: 1rem; }

.article-body ol { padding-left: 1.3rem; }

.article-body li { margin-bottom: 0.4rem; }

.article-body code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  background: var(--brand-soft);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.95em;
  letter-spacing: 0.04em;
}

.table-wrap { overflow-x: auto; margin: 0 0 1rem; }

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.93rem;
}

.data-table th, .data-table td {
  text-align: left;
  vertical-align: top;
  padding: 0.55rem 0.6rem;
  border-bottom: 1px solid var(--line);
}

.data-table th {
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-weight: 650;
}

.cta-box {
  background: var(--brand-soft);
  border: 1px solid #c9d9ee;
  border-radius: var(--radius);
  padding: 1.35rem 1.25rem;
  margin: 1.85rem 0;
}

.prose .cta-box h2, .cta-box h2 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
  color: var(--brand-dark);
}

.cta-note {
  font-size: 0.82rem !important;
  color: var(--muted) !important;
  margin: 0.85rem 0 0;
}

.related, .sources {
  border-top: 1px solid var(--line);
  margin-top: 1.75rem;
  padding-top: 0.25rem;
}

.sources ul { padding-left: 1.2rem; }

.sources p, .sources li { font-size: 0.9rem; color: var(--muted); }

.post-list {
  display: grid;
  gap: 1rem;
  margin-bottom: 1rem;
}

.post-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.35rem 1.35rem 1.2rem;
}

.post-card h2 {
  margin: 0 0 0.45rem;
  font-size: 1.12rem;
  line-height: 1.35;
}

.post-card h2 a { color: var(--brand-dark); text-decoration: none; }

.post-card h2 a:hover { color: var(--brand); text-decoration: underline; }

.post-card p { margin: 0 0 0.6rem; color: var(--muted); font-size: 0.96rem; }

.read-more { font-weight: 600; font-size: 0.92rem; }

.guide-links { margin: 0 0 1rem; padding-left: 1.25rem; }

.guide-links li { margin-bottom: 0.45rem; }