/* ATD Automotive — design system. Brand: black + red + white (from the ATD logo). Zero framework. */
:root {
  --navy: #101315;       /* near-black — headings, dark panels (name kept for template compat) */
  --navy-2: #1b1f22;
  --navy-3: #a80c1e;     /* dark red — links, hover accents */
  --amber: #cd0a20;      /* brand red (logo stripe) — primary CTA background */
  --amber-dark: #a80c1e; /* hover red */
  --amber-text: #a30819; /* AA-contrast red for text on white/soft backgrounds */
  --red-light: #ff707b;  /* red accent that passes contrast on dark panels */
  --ink: #16191c;
  --muted: #4b545c;
  --line: #e2e5e8;
  --bg: #ffffff;
  --bg-soft: #f4f5f6;
  --radius: 10px;
  --wrap: 72rem;
  font-size: 100%;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}
img, svg { max-width: 100%; height: auto; }
a { color: var(--navy-3); }
h1, h2, h3, h4 { line-height: 1.2; color: var(--navy); margin: 0 0 .5em; }
h1 { font-size: clamp(1.9rem, 4.5vw, 3rem); letter-spacing: -.01em; }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 1.25rem; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.skip { position: absolute; left: -999px; top: 0; background: var(--amber); color: var(--navy); padding: .5rem 1rem; z-index: 100; }
.skip:focus { left: 0; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  font-weight: 700; text-decoration: none; border-radius: var(--radius);
  padding: .7rem 1.2rem; white-space: nowrap;
}
.btn-call { background: var(--amber); color: #fff; }
.btn-call:hover { background: var(--amber-dark); }
.btn-ghost { border: 2px solid #ffffff55; color: #fff; }
.btn-ghost:hover { border-color: #fff; }
.btn-navy { background: var(--navy); color: #fff; }
.btn-lg { font-size: 1.15rem; padding: .9rem 1.6rem; }

/* Header — white, carrying the black/red logo */
.site-header { background: #fff; color: var(--ink); position: sticky; top: 0; z-index: 50; border-bottom: 3px solid var(--amber); }
.header-row { display: flex; align-items: center; gap: 1rem; padding: .6rem 1.25rem; }
.brand { display: flex; align-items: center; margin-right: auto; }
.brand img { display: block; width: 171px; height: 48px; }
.site-nav { display: flex; gap: 1.1rem; flex-wrap: wrap; }
.site-nav a { color: #24292e; text-decoration: none; font-weight: 600; font-size: .95rem; }
.site-nav a:hover { color: var(--amber-text); }
.nav-toggle { display: none; background: none; border: 0; color: var(--ink); font-size: 1.5rem; cursor: pointer; padding: .25rem .5rem; }

/* Breadcrumbs */
.crumbs { font-size: .85rem; color: var(--muted); padding-top: .8rem; }
.crumbs a { color: var(--muted); }
.crumbs span[aria-current] { color: var(--ink); font-weight: 600; }

/* Hero — black panel with the logo's red stripe as an underline motif */
.hero { background: linear-gradient(160deg, #0b0d0f 0%, var(--navy) 55%, var(--navy-2) 100%); color: #fff; padding: 3.5rem 0 3rem; }
.hero h1 { color: #fff; max-width: 46rem; }
.hero h1::after { content: ""; display: block; width: 6.5rem; height: .3rem; background: var(--amber); margin-top: .55rem; }
.hero .lede { font-size: 1.15rem; color: #d3d8dd; max-width: 42rem; }
.hero-badges { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1.2rem; }
.badge { background: #ffffff14; border: 1px solid #ffffff2e; color: #fff; font-size: .8rem; font-weight: 600; padding: .25rem .7rem; border-radius: 99px; }
.badge strong { color: var(--red-light); }
.hero-ctas { display: flex; flex-wrap: wrap; gap: .8rem; margin: 1.5rem 0 .5rem; }
.hero-note { font-size: .85rem; color: #aebdd3; }

/* Stat strip */
.stats { background: var(--bg-soft); border-bottom: 1px solid var(--line); }
.stats .wrap { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; padding: 1.1rem 1.25rem; text-align: center; }
.stat b { display: block; font-size: 1.35rem; color: var(--navy); }
.stat span { font-size: .85rem; color: var(--muted); }

/* Sections & cards */
section { padding: 2.75rem 0; }
.section-soft { background: var(--bg-soft); }
.kicker { text-transform: uppercase; letter-spacing: .1em; font-size: .8rem; font-weight: 700; color: var(--amber-text); margin-bottom: .3rem; }
.grid { display: grid; gap: 1.1rem; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.25rem; display: block; text-decoration: none; color: var(--ink);
}
a.card:hover { border-color: var(--navy-3); box-shadow: 0 4px 16px #0d224014; }
.card h3 { margin-bottom: .35rem; }
.card .from { color: var(--amber-text); font-weight: 700; font-size: .9rem; }
.card p { margin: 0; color: var(--muted); font-size: .95rem; }

/* Answer-first callout (AEO) */
.answer {
  background: #fdf0f2; border-left: 4px solid var(--amber);
  padding: 1rem 1.25rem; border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.25rem 0; font-size: 1.05rem;
}
.answer p { margin: 0; }

/* Tables */
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; margin: 1rem 0; font-size: .95rem; }
th, td { text-align: left; padding: .6rem .8rem; border-bottom: 1px solid var(--line); }
th { background: var(--navy); color: #fff; }
tr:nth-child(even) td { background: var(--bg-soft); }

/* Checklist */
ul.checks { list-style: none; padding: 0; }
ul.checks li { padding-left: 1.7rem; position: relative; margin-bottom: .5rem; }
ul.checks li::before { content: "✓"; position: absolute; left: 0; color: var(--amber-text); font-weight: 800; }

/* FAQ */
.faq-section { background: var(--bg-soft); }
.faq { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: .7rem; }
.faq summary { cursor: pointer; padding: .9rem 1.1rem; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 1.4rem; color: var(--navy-3); flex: none; }
.faq[open] summary::after { content: "–"; }
.faq summary h3 { margin: 0; font-size: 1.02rem; }
.faq p { padding: 0 1.1rem 1rem; margin: 0; color: var(--muted); }

/* CTA band */
.cta-band { background: linear-gradient(150deg, #0b0d0f, var(--navy-2)); color: #fff; text-align: center; border-top: 4px solid var(--amber); }
.cta-band h2 { color: #fff; }
.cta-band p { color: #c9cfd5; max-width: 40rem; margin: 0 auto 1.25rem; }

/* Footer */
.site-footer { background: #0b0d0f; color: #b9bec4; font-size: .92rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem; padding: 2.5rem 1.25rem; }
.footer-brand { color: #fff; font-weight: 800; font-size: 1.05rem; margin-bottom: .4rem; }
.footer-h { color: var(--red-light); font-weight: 700; margin-bottom: .4rem; }
.site-footer a { color: #d7dbdf; text-decoration: none; display: inline-block; padding: .25rem 0; }
.site-footer nav a { display: block; padding: .18rem 0; }
.site-footer a:hover { color: var(--red-light); }
.footer-bottom { border-top: 1px solid #ffffff1a; padding: 1rem 1.25rem; font-size: .82rem; color: #8f959b; }
.footer-bottom p { margin: 0; }

/* Sticky mobile call bar */
.mobile-call {
  display: none; position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
  background: var(--amber); color: #fff; font-weight: 800; font-size: 1.1rem;
  text-align: center; text-decoration: none; padding: .85rem;
  align-items: center; justify-content: center; gap: .5rem;
  box-shadow: 0 -2px 12px #0d224033;
}

/* Prose helpers for content pages */
.prose { max-width: 50rem; }
.prose h2 { margin-top: 1.6em; }
.page-head { padding: 2.5rem 0 1rem; }
.page-head h1 { max-width: 50rem; }
.page-head .lede { font-size: 1.1rem; color: var(--muted); max-width: 46rem; }

@media (max-width: 900px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .site-nav {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: #fff; border-bottom: 3px solid var(--amber); box-shadow: 0 8px 20px #10131526;
    flex-direction: column; gap: 0; padding: .5rem 0;
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: .7rem 1.25rem; }
  .nav-toggle { display: block; }
  .header-call { display: none; }
  .site-header { position: relative; }
}
@media (max-width: 640px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .stats .wrap { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 1.4rem; }
  .mobile-call { display: flex; }
  body { padding-bottom: 3.4rem; }
}