/*
Theme Name: VinDecoderTheme
Theme URI: https://vindecodertheme.example.com
Author: VinDecoderTheme Team
Author URI: https://vindecodertheme.example.com
Description: An ultra-fast, multi-brand WordPress theme built around a free, client-side VIN decoder tool. Each supported brand (Porsche, Audi, BMW, Lexus, Range Rover) gets its own exact-match-keyword landing page sharing one NHTSA-backed decode engine, PDF/image export, and AdSense-friendly guide content.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.6
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: vindecodertheme
Tags: one-column, custom-logo, custom-menu, translation-ready, automotive, minimal
*/

/* ==========================================================================
   1. DESIGN TOKENS
   ========================================================================== */
:root {
  --vd-color-bg: #f5f7fa;
  --vd-color-surface: #ffffff;
  --vd-color-surface-alt: #eef1f6;
  --vd-color-border: #dbe1ea;
  --vd-color-text: #131b2e;
  --vd-color-text-muted: #55607a;
  --vd-color-primary: #1d4ed8;
  --vd-color-primary-dark: #1636a3;
  --vd-color-primary-light: #e5edff;
  --vd-color-accent: #d97a1f;
  --vd-color-danger: #b3261e;
  --vd-color-danger-bg: #fdecea;
  --vd-color-success: #157a4f;

  --vd-font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --vd-font-heading: "Manrope", var(--vd-font-base);
  --vd-font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --vd-radius-sm: 6px;
  --vd-radius-md: 12px;
  --vd-radius-lg: 20px;

  --vd-shadow-sm: 0 1px 2px rgba(19, 27, 46, 0.06);
  --vd-shadow-md: 0 6px 20px rgba(19, 27, 46, 0.08);
  --vd-shadow-lg: 0 16px 40px rgba(19, 27, 46, 0.12);

  --vd-space-1: 0.25rem;
  --vd-space-2: 0.5rem;
  --vd-space-3: 0.75rem;
  --vd-space-4: 1rem;
  --vd-space-6: 1.5rem;
  --vd-space-8: 2rem;
  --vd-space-12: 3rem;

  --vd-container: 1120px;
  --vd-container-narrow: 760px;
}

/* ==========================================================================
   2. RESET
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--vd-font-base);
  color: var(--vd-color-text);
  background: var(--vd-color-bg);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--vd-color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4, h5, h6 {
  font-family: var(--vd-font-heading);
  line-height: 1.22;
  margin: 0 0 var(--vd-space-4);
  font-weight: 800;
  color: var(--vd-color-text);
  text-wrap: balance;
  letter-spacing: -0.01em;
}
p { margin: 0 0 var(--vd-space-4); }
ul, ol { margin: 0 0 var(--vd-space-4); padding-left: 1.25rem; }
button, input, select, textarea { font-family: inherit; font-size: 1rem; }
button { cursor: pointer; }
:focus-visible { outline: 2px solid var(--vd-color-primary); outline-offset: 2px; }
.screen-reader-text, .vd-visually-hidden {
  position: absolute !important; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: -9999px; top: 0; background: var(--vd-color-primary);
  color: #fff; padding: var(--vd-space-2) var(--vd-space-4); z-index: 10000; border-radius: 0 0 var(--vd-radius-sm) 0;
}
.skip-link:focus { left: 0; }
[hidden] { display: none !important; }

/* ==========================================================================
   3. LAYOUT UTILITIES
   ========================================================================== */
.vd-container { max-width: var(--vd-container); margin: 0 auto; padding: 0 var(--vd-space-4); }
.vd-container--narrow { max-width: var(--vd-container-narrow); }
.vd-section { padding: var(--vd-space-12) 0; }
.vd-text-center { text-align: center; }
.vd-text-muted { color: var(--vd-color-text-muted); }

/* ==========================================================================
   4. HEADER
   ========================================================================== */
.vd-site-header { background: var(--vd-color-surface); border-bottom: 1px solid var(--vd-color-border); position: sticky; top: 0; z-index: 500; }
.vd-header-inner { display: flex; align-items: center; justify-content: space-between; padding: var(--vd-space-3) var(--vd-space-4); gap: var(--vd-space-4); }
.vd-logo { display: flex; align-items: center; gap: var(--vd-space-2); font-family: var(--vd-font-heading); font-size: 1.25rem; font-weight: 800; letter-spacing: -0.01em; color: var(--vd-color-text); }
.vd-logo:hover { text-decoration: none; color: var(--vd-color-primary); }
.vd-logo-mark { display: inline-flex; align-items: center; justify-content: center; width: 34px; height: 34px; border-radius: 9px; background: var(--vd-color-primary); color: #fff; font-size: 0.9rem; font-family: var(--vd-font-mono); font-weight: 700; }
.vd-nav-toggle { display: none; background: transparent; border: 1px solid var(--vd-color-border); border-radius: var(--vd-radius-sm); padding: 8px 10px; }
.vd-nav-toggle span { display: block; width: 22px; height: 2px; background: var(--vd-color-text); margin: 4px 0; }
.vd-primary-nav ul { list-style: none; display: flex; gap: var(--vd-space-6); margin: 0; padding: 0; flex-wrap: wrap; }
.vd-primary-nav a { color: var(--vd-color-text); font-weight: 600; font-size: 0.92rem; }
.vd-primary-nav a:hover { color: var(--vd-color-primary); text-decoration: none; }
@media (max-width: 860px) {
  .vd-nav-toggle { display: inline-flex; flex-direction: column; }
  .vd-primary-nav {
    position: absolute; left: 0; right: 0; top: 100%;
    background: var(--vd-color-surface); border-bottom: 1px solid var(--vd-color-border);
    box-shadow: var(--vd-shadow-md); display: none;
  }
  .vd-primary-nav.is-open { display: block; }
  .vd-primary-nav ul { flex-direction: column; gap: 0; padding: var(--vd-space-2) var(--vd-space-4) var(--vd-space-4); }
  .vd-primary-nav li { border-bottom: 1px solid var(--vd-color-border); }
  .vd-primary-nav li:last-child { border-bottom: none; }
  .vd-primary-nav a { display: block; padding: var(--vd-space-3) 0; }
}

/* ==========================================================================
   5. HERO / DECODER TOOL
   ========================================================================== */
.vd-hero { position: relative; background: linear-gradient(180deg, var(--vd-color-primary-light) 0%, var(--vd-color-bg) 100%); padding: var(--vd-space-12) 0 var(--vd-space-8); overflow: hidden; }
.vd-hero::before { content: ""; position: absolute; width: 380px; height: 380px; top: -160px; right: -120px; border-radius: 50%; background: radial-gradient(circle at 30% 30%, rgba(29,78,216,0.14), transparent 70%); z-index: 0; }
.vd-hero::after { content: ""; position: absolute; width: 260px; height: 260px; bottom: -120px; left: -80px; border-radius: 50%; background: radial-gradient(circle at 60% 60%, rgba(217,122,31,0.10), transparent 70%); z-index: 0; }
.vd-hero > .vd-container { position: relative; z-index: 1; }
.vd-hero-head { max-width: 740px; margin: 0 auto var(--vd-space-8); text-align: center; }
.vd-hero-head h1 { font-size: clamp(1.6rem, 4vw, 2.5rem); margin-bottom: var(--vd-space-3); }
.vd-hero-head p { font-size: 1.1rem; color: var(--vd-color-text-muted); margin-bottom: 0; }
.vd-eyebrow { display: inline-flex; align-items: center; gap: 6px; background: var(--vd-color-surface); color: var(--vd-color-primary-dark); font-weight: 700; font-size: 0.78rem; letter-spacing: 0.04em; text-transform: uppercase; padding: 7px 14px; border-radius: 999px; margin-bottom: var(--vd-space-4); box-shadow: var(--vd-shadow-sm); }
.vd-eyebrow::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--vd-color-primary); flex: none; }

.vd-card { background: var(--vd-color-surface); border: 1px solid var(--vd-color-border); border-radius: var(--vd-radius-lg); box-shadow: var(--vd-shadow-md); padding: var(--vd-space-8); }
.vd-tool-card { max-width: 720px; margin: 0 auto; }

.vd-vin-field { display: flex; flex-direction: column; gap: var(--vd-space-2); margin-bottom: var(--vd-space-4); }
.vd-vin-field label { font-weight: 700; font-size: 0.95rem; }
.vd-vin-field .vd-hint { font-size: 0.8rem; color: var(--vd-color-text-muted); }
.vd-vin-field input {
  border: 1.5px solid var(--vd-color-border); border-radius: var(--vd-radius-sm);
  padding: 0.85rem 1rem; background: var(--vd-color-surface); color: var(--vd-color-text);
  width: 100%; font-family: var(--vd-font-mono); font-size: 1.1rem; letter-spacing: 0.08em;
  text-transform: uppercase;
}
.vd-vin-field input:focus { outline: none; border-color: var(--vd-color-primary); box-shadow: 0 0 0 3px var(--vd-color-primary-light); }
.vd-char-count { font-size: 0.78rem; color: var(--vd-color-text-muted); text-align: right; font-variant-numeric: tabular-nums; }
.vd-char-count.is-complete { color: var(--vd-color-success); font-weight: 700; }

.vd-form-actions { margin-top: var(--vd-space-4); text-align: center; }
.vd-btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: none; border-radius: var(--vd-radius-sm); padding: 0.9rem 1.75rem; font-weight: 700; font-size: 1rem; cursor: pointer; transition: transform .12s ease, box-shadow .12s ease, background .15s ease; }
.vd-btn:active { transform: translateY(1px); }
.vd-btn-primary { background: linear-gradient(180deg, var(--vd-color-primary) 0%, var(--vd-color-primary-dark) 100%); color: #fff; box-shadow: var(--vd-shadow-sm); }
.vd-btn-primary:hover { background: linear-gradient(180deg, var(--vd-color-primary-dark) 0%, var(--vd-color-primary-dark) 100%); text-decoration: none; color: #fff; box-shadow: var(--vd-shadow-md); transform: translateY(-1px); }
.vd-btn-secondary { background: var(--vd-color-surface); color: var(--vd-color-text); border: 1.5px solid var(--vd-color-border); }
.vd-btn-secondary:hover { border-color: var(--vd-color-primary); color: var(--vd-color-primary); text-decoration: none; }
.vd-btn[disabled] { opacity: .6; cursor: not-allowed; }

.vd-form-error { color: var(--vd-color-danger); background: var(--vd-color-danger-bg); border-radius: var(--vd-radius-sm); padding: var(--vd-space-3); margin-top: var(--vd-space-4); font-weight: 600; font-size: 0.9rem; }
.vd-brand-mismatch { color: var(--vd-color-accent); background: #fdf3e7; border: 1px solid #f3dcb8; border-radius: var(--vd-radius-sm); padding: var(--vd-space-3); margin-top: var(--vd-space-4); font-size: 0.9rem; }

/* ==========================================================================
   6. RESULTS DASHBOARD
   ========================================================================== */
#vd-results { max-width: 900px; margin: var(--vd-space-8) auto 0; }
.vd-result-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--vd-space-3); margin-bottom: var(--vd-space-6); }
@media (max-width: 720px) { .vd-result-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .vd-result-grid { grid-template-columns: 1fr; } }
.vd-fact { background: var(--vd-color-surface); border: 1px solid var(--vd-color-border); border-radius: var(--vd-radius-md); padding: var(--vd-space-4); }
.vd-fact-label { font-size: 0.72rem; text-transform: uppercase; letter-spacing: .04em; font-weight: 700; color: var(--vd-color-text-muted); margin-bottom: 4px; }
.vd-fact-value { font-size: 1.05rem; font-weight: 700; font-family: var(--vd-font-heading); color: var(--vd-color-text); }
.vd-fact-value.is-empty { color: var(--vd-color-text-muted); font-weight: 500; font-style: italic; }

.vd-vin-strip { display: flex; flex-wrap: wrap; justify-content: center; gap: 2px; margin: 0 0 var(--vd-space-6); font-family: var(--vd-font-mono); }
.vd-vin-char { width: 28px; height: 34px; display: flex; align-items: center; justify-content: center; background: var(--vd-color-surface-alt); border: 1px solid var(--vd-color-border); border-radius: 4px; font-weight: 700; font-size: 0.95rem; }
.vd-vin-char.is-wmi { background: var(--vd-color-primary-light); border-color: var(--vd-color-primary); color: var(--vd-color-primary-dark); }
.vd-vin-char.is-check { background: #fdf3e7; border-color: var(--vd-color-accent); }
.vd-vin-char.is-year { background: #eafaf1; border-color: var(--vd-color-success); color: var(--vd-color-success); }

.vd-results-actions { display: flex; gap: var(--vd-space-3); flex-wrap: wrap; justify-content: center; margin-top: var(--vd-space-8); }

/* ==========================================================================
   7. GUIDE / CONTENT SECTION
   ========================================================================== */
.vd-content-section { padding: var(--vd-space-12) 0; }
.vd-prose { max-width: var(--vd-container-narrow); margin: 0 auto; }
.vd-prose h2 { font-size: 1.5rem; margin-top: var(--vd-space-12); padding-top: var(--vd-space-4); border-top: 1px solid var(--vd-color-border); }
.vd-prose h2:first-child { margin-top: 0; padding-top: 0; border-top: none; }
.vd-prose h3 { font-size: 1.1rem; margin-top: var(--vd-space-6); }
.vd-prose p, .vd-prose li { color: var(--vd-color-text); font-size: 1.02rem; max-width: 68ch; }
.vd-prose ul li, .vd-prose ol li { margin-bottom: var(--vd-space-2); }

.vd-table-wrap { overflow-x: auto; margin: var(--vd-space-6) 0; border: 1px solid var(--vd-color-border); border-radius: var(--vd-radius-md); }
.vd-table-wrap table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.vd-table-wrap th, .vd-table-wrap td { padding: 0.7rem 1rem; text-align: left; border-bottom: 1px solid var(--vd-color-border); min-width: 140px; }
.vd-table-wrap thead th { background: var(--vd-color-surface-alt); font-family: var(--vd-font-heading); font-weight: 800; }
.vd-table-wrap tbody tr:last-child td { border-bottom: none; }
.vd-table-wrap tbody tr:nth-child(even) { background: var(--vd-color-surface-alt); }

.vd-disclaimer { background: var(--vd-color-danger-bg); border: 1.5px solid #f3c6c2; border-left: 6px solid var(--vd-color-danger); border-radius: var(--vd-radius-md); padding: var(--vd-space-6); margin: var(--vd-space-8) 0; }
.vd-disclaimer h3 { color: var(--vd-color-danger); margin-top: 0; display: flex; align-items: center; gap: 10px; }
.vd-disclaimer-badge { display: inline-flex; align-items: center; justify-content: center; width: 26px; height: 26px; border-radius: 50%; background: var(--vd-color-danger); color: #fff; font-size: 0.85rem; flex: none; }
.vd-disclaimer p:last-child { margin-bottom: 0; }
.vd-disclaimer a { color: var(--vd-color-danger); font-weight: 700; text-decoration: underline; }

.vd-faq { margin-top: var(--vd-space-4); }
.vd-faq-item { border: 1px solid var(--vd-color-border); border-radius: var(--vd-radius-md); background: var(--vd-color-surface); margin-bottom: var(--vd-space-3); overflow: hidden; transition: border-color .15s ease, box-shadow .15s ease; }
.vd-faq-item:hover { border-color: var(--vd-color-primary); box-shadow: var(--vd-shadow-sm); }
.vd-faq-item[open] { border-color: var(--vd-color-primary); }
.vd-faq-item summary { cursor: pointer; list-style: none; padding: var(--vd-space-4) var(--vd-space-6); font-weight: 700; display: flex; align-items: center; justify-content: space-between; gap: var(--vd-space-4); }
.vd-faq-item summary::-webkit-details-marker { display: none; }
.vd-faq-item summary::after { content: "+"; font-size: 1.3rem; font-weight: 400; color: var(--vd-color-primary); flex: none; }
.vd-faq-item[open] summary::after { content: "\2212"; }
.vd-faq-item .vd-faq-answer { padding: 0 var(--vd-space-6) var(--vd-space-4); color: var(--vd-color-text-muted); }

/* ==========================================================================
   8. BRAND HUB (front-page.php)
   ========================================================================== */
.vd-brand-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: var(--vd-space-4); margin-top: var(--vd-space-4); }
.vd-brand-card {
  display: block; background: var(--vd-color-surface); border: 1px solid var(--vd-color-border);
  border-radius: var(--vd-radius-md); padding: var(--vd-space-6); text-align: center;
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.vd-brand-card:hover { transform: translateY(-3px); box-shadow: var(--vd-shadow-md); border-color: var(--vd-color-primary); text-decoration: none; }
.vd-brand-card .vd-brand-name { font-family: var(--vd-font-heading); font-weight: 800; font-size: 1.1rem; color: var(--vd-color-text); margin-bottom: 4px; }
.vd-brand-card .vd-brand-cta { font-size: 0.85rem; color: var(--vd-color-primary); font-weight: 700; }

/* ==========================================================================
   9. BLOG / ARCHIVE + PAGE TEMPLATE
   ========================================================================== */
.vd-post-list { display: grid; gap: var(--vd-space-6); max-width: var(--vd-container-narrow); margin: 0 auto; }
.vd-post-card { background: var(--vd-color-surface); border: 1px solid var(--vd-color-border); border-radius: var(--vd-radius-md); padding: var(--vd-space-6); }
.vd-post-card h2 { margin-bottom: var(--vd-space-2); font-size: 1.4rem; }
.vd-post-meta { font-size: 0.85rem; color: var(--vd-color-text-muted); margin-bottom: var(--vd-space-3); }
.vd-pagination { display: flex; justify-content: center; gap: var(--vd-space-2); margin-top: var(--vd-space-8); }
.vd-pagination a, .vd-pagination span { border: 1px solid var(--vd-color-border); border-radius: var(--vd-radius-sm); padding: 0.5rem 0.9rem; }

.vd-page-header { padding: var(--vd-space-8) 0 var(--vd-space-4); border-bottom: 1px solid var(--vd-color-border); background: var(--vd-color-surface-alt); }
.vd-page-header h1 { margin-bottom: 0; font-size: clamp(1.5rem, 3.5vw, 2.1rem); }
.vd-page-content { padding: var(--vd-space-8) 0; }

/* ==========================================================================
   10. FOOTER
   ========================================================================== */
.vd-site-footer { background: #0d1526; color: #cfd8ec; padding: var(--vd-space-12) 0 var(--vd-space-6); margin-top: var(--vd-space-12); }
.vd-footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: var(--vd-space-8); margin-bottom: var(--vd-space-8); }
@media (max-width: 720px) { .vd-footer-grid { grid-template-columns: 1fr; } }
.vd-footer-brand { font-family: var(--vd-font-heading); font-weight: 800; font-size: 1.15rem; color: #fff; margin-bottom: var(--vd-space-2); }
.vd-footer-desc { color: #9aa9c9; font-size: 0.9rem; max-width: 340px; }
.vd-footer-heading { color: #fff; font-size: 0.85rem; text-transform: uppercase; letter-spacing: .04em; margin-bottom: var(--vd-space-3); }
.vd-footer-links { list-style: none; margin: 0; padding: 0; }
.vd-footer-links li { margin-bottom: var(--vd-space-2); }
.vd-footer-links a { color: #cfd8ec; font-size: 0.92rem; }
.vd-footer-links a:hover { color: #fff; }
.vd-footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: var(--vd-space-6); display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--vd-space-3); font-size: 0.82rem; color: #9aa9c9; }
.vd-footer-legal-note { max-width: 640px; }

/* ==========================================================================
   11. MISC
   ========================================================================== */
.vd-spinner { display: inline-block; width: 16px; height: 16px; border: 2px solid rgba(255,255,255,0.5); border-top-color: #fff; border-radius: 50%; animation: vd-spin 0.7s linear infinite; }
@keyframes vd-spin { to { transform: rotate(360deg); } }
.vd-toast { position: fixed; bottom: var(--vd-space-4); left: 50%; transform: translateX(-50%) translateY(20px); background: var(--vd-color-text); color: #fff; padding: 0.75rem 1.25rem; border-radius: var(--vd-radius-sm); font-size: 0.9rem; opacity: 0; pointer-events: none; transition: opacity .2s ease, transform .2s ease; z-index: 9999; }
.vd-toast.is-visible { opacity: 1; transform: translateX(-50%) translateY(0); pointer-events: auto; }

@media print {
  .vd-site-header, .vd-site-footer, .vd-hero-head, #vd-tool-card, .vd-content-section, .vd-results-actions { display: none !important; }
  #vd-results { max-width: 100%; margin: 0; }
  body { background: #fff; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}