/* =========================================================================
   AmpAuto 2026 — Shared Visual Shell (v8 design system, site-wide)
   Loaded AFTER per-page inline <style> blocks so its overrides win.
   ONLY touches: body background, nav baseline, typography baseline,
   theme tokens, scroll progress bar. Does NOT touch content/cards.
   ========================================================================= */

:root{
  --amp-orange-vivid:#ff5a1f;
  --amp-orange:#f97316;
  --amp-amber:#fbbf24;
  --amp-blue:#2563eb;
  --amp-blue-dark:#1d4ed8;
  --amp-blue-soft:#dbeafe;
  --amp-purple:#7c3aed;
  --amp-good:#16a34a;
  --amp-warn:#d97706;
  --amp-bad:#dc2626;
  --amp-mono:'JetBrains Mono',ui-monospace,monospace;

  /* Layered shadow tokens */
  --amp-shadow-card:0 1px 0 rgba(255,255,255,.7) inset, 0 2px 4px rgba(8,12,20,.05), 0 12px 32px -8px rgba(8,12,20,.10), 0 24px 64px -16px rgba(8,12,20,.06);
  --amp-shadow-lift:0 1px 0 rgba(255,255,255,.7) inset, 0 4px 8px rgba(8,12,20,.06), 0 18px 40px -10px rgba(8,12,20,.14), 0 36px 80px -20px rgba(8,12,20,.10);
}
[data-theme="dark"]{
  --amp-shadow-card:0 1px 0 rgba(255,255,255,.06) inset, 0 2px 4px rgba(0,0,0,.4), 0 12px 32px -8px rgba(0,0,0,.5), 0 24px 64px -16px rgba(0,0,0,.4);
  --amp-shadow-lift:0 1px 0 rgba(255,255,255,.08) inset, 0 4px 8px rgba(0,0,0,.5), 0 18px 40px -10px rgba(0,0,0,.6), 0 36px 80px -20px rgba(0,0,0,.5);
}

/* === BODY BACKGROUND MESH (dark mode and light mode both) === */
html,body{max-width:100%}
body{
  font-family:'Inter',-apple-system,system-ui,sans-serif !important;
  -webkit-font-smoothing:antialiased;
  position:relative;
}

/* Dark theme (existing default for ampauto.io) gets the racing-instrument mesh */
[data-theme="dark"] body{
  background-image:
    radial-gradient(ellipse 800px 600px at 15% 8%, rgba(255,90,31,.10), transparent 60%),
    radial-gradient(ellipse 900px 700px at 88% 92%, rgba(59,130,246,.09), transparent 65%),
    radial-gradient(ellipse 600px 500px at 50% 50%, rgba(124,58,237,.06), transparent 70%) !important;
  background-attachment:fixed !important;
}
/* Light theme gets a softer version */
:root:not([data-theme="dark"]) body,
[data-theme="light"] body{
  background-image:
    radial-gradient(ellipse 800px 600px at 15% 8%, rgba(255,90,31,.07), transparent 60%),
    radial-gradient(ellipse 900px 700px at 88% 92%, rgba(37,99,235,.06), transparent 65%),
    radial-gradient(ellipse 600px 500px at 50% 50%, rgba(124,58,237,.03), transparent 70%) !important;
  background-attachment:fixed !important;
}

/* Subtle dot grid overlay */
body::before{
  content:'';position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:radial-gradient(circle, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size:24px 24px;
}
:root:not([data-theme="dark"]) body::before,
[data-theme="light"] body::before{background-image:radial-gradient(circle, rgba(15,23,42,.05) 1px, transparent 1px)}

/* Noise film */
body::after{
  content:'';position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.06;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* Lift real content above the noise/grid */
nav, main, section, footer, .page-wrap, .dtc-hero, .hero, .mobile-ai-cta, .scroll-progress{position:relative;z-index:1}

/* === NAV — bigger, with stronger CTA, forced horizontal layout === */
nav{
  display:flex !important;
  align-items:center !important;
  justify-content:space-between !important;
  gap:24px !important;
  height:72px !important;
  padding:0 36px !important;
  backdrop-filter:saturate(180%) blur(16px) !important;
  -webkit-backdrop-filter:saturate(180%) blur(16px) !important;
  box-shadow:0 1px 0 rgba(255,255,255,.05) inset, 0 4px 16px rgba(0,0,0,.15) !important;
}
nav > ul.nav-links{display:flex !important;align-items:center !important;gap:28px !important;list-style:none !important;padding:0 !important;margin:0 !important}
nav > ul.nav-links > li{list-style:none !important;padding:0 !important;margin:0 !important}
nav > ul.nav-links > li::before{content:none !important}
.nav-logo, .nav-logo-text{font-size:23px !important;font-weight:800 !important;letter-spacing:-.5px !important}
.nav-logo span{color:var(--amp-orange-vivid) !important}
.nav-logo-icon{width:38px !important;height:38px !important;border-radius:10px !important;background:linear-gradient(135deg,var(--amp-orange-vivid) 0%,var(--amp-amber) 100%) !important;box-shadow:0 4px 12px rgba(255,90,31,.35), inset 0 1px 0 rgba(255,255,255,.3) !important}
.nav-links{gap:28px !important;font-size:16px !important}
.nav-links a{font-weight:600 !important;letter-spacing:.1px !important}
.nav-cta{
  background:linear-gradient(135deg,var(--amp-blue) 0%,var(--amp-blue-dark) 100%) !important;
  padding:12px 22px !important;border-radius:10px !important;
  font-size:15px !important;font-weight:700 !important;letter-spacing:.2px !important;
  box-shadow:0 6px 16px rgba(37,99,235,.35), inset 0 1px 0 rgba(255,255,255,.25) !important;
}
.nav-cta:hover{filter:brightness(1.08) !important;box-shadow:0 8px 20px rgba(37,99,235,.45), inset 0 1px 0 rgba(255,255,255,.25) !important}
@media(max-width:760px){nav{height:64px !important;padding:0 20px !important}.nav-links{display:none}}

/* === TYPOGRAPHY BASELINE BUMP === */
body{font-size:17px !important;line-height:1.65 !important}
@media(min-width:760px){body{font-size:18px !important}}
h1{letter-spacing:-.5px !important}
h2{letter-spacing:-.3px !important}

/* === SCROLL PROGRESS BAR (injected via JS at top) === */
.scroll-progress{position:fixed;top:0;left:0;height:3px;width:100%;background:transparent;z-index:200;pointer-events:none}
.scroll-progress-bar{height:100%;width:0%;background:linear-gradient(90deg,var(--amp-orange-vivid) 0%,var(--amp-amber) 50%,var(--amp-blue) 100%);box-shadow:0 0 12px rgba(255,90,31,.6);transition:width .12s ease-out}

/* === REVEAL ON SCROLL (used by injected helper script) === */
.amp-reveal{opacity:0;transform:translateY(20px);transition:opacity .65s cubic-bezier(.2,.6,.2,1), transform .65s cubic-bezier(.2,.6,.2,1)}
.amp-reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.amp-reveal{opacity:1;transform:none;transition:none}}

/* === STICKY MOBILE CHECKOUT BAR (used on diag/dtc pages, opt-in via .amp-sticky-cta) === */
.amp-sticky-cta{display:none}
@media(max-width:980px){
  .amp-sticky-cta{
    display:flex;position:fixed;bottom:0;left:0;right:0;z-index:99;
    background:var(--surface,#111827);border-top:1px solid var(--border,#1e2d45);
    padding:12px 16px;align-items:center;justify-content:space-between;gap:12px;
    box-shadow:0 -4px 20px rgba(0,0,0,.25);
  }
  .amp-sticky-cta-text{font-size:14px;font-weight:700;line-height:1.25;color:var(--text,#fff)}
  .amp-sticky-cta-text small{display:block;color:var(--muted,#94a3b8);font-weight:400;font-size:12px;margin-top:2px}
  .amp-sticky-cta a{background:var(--amp-blue);color:#fff;padding:11px 16px;border-radius:9px;font-size:14px;font-weight:700;white-space:nowrap;box-shadow:0 4px 12px rgba(37,99,235,.4);text-decoration:none}
}

/* Mark the body as amp-styled (for any conditional CSS later) */
body.amp-styled{}

/* AUTHOR BYLINE — injected near footer on every page for E-E-A-T signals */
.amp-author-byline{
  max-width:1200px;margin:48px auto 0;padding:18px 28px;
  background:rgba(15,23,42,.5);
  border:1px solid rgba(59,130,246,.18);border-radius:12px;
  font-family:'JetBrains Mono',ui-monospace,monospace;font-size:13px;
  color:#94a3b8;letter-spacing:.3px;
  display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:14px;
  box-shadow:0 6px 18px rgba(0,0,0,.18),inset 0 1px 0 rgba(255,255,255,.04);
}
.amp-author-byline strong{color:#fff;font-weight:700}
.amp-author-byline a{color:var(--amp-blue,#3b82f6);font-weight:700;text-decoration:none}
.amp-author-byline a:hover{text-decoration:underline}
.amp-author-byline-l{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.amp-author-byline-avatar{
  width:30px;height:30px;border-radius:8px;
  background:linear-gradient(135deg,var(--amp-blue,#3b82f6),#7c3aed);
  display:inline-flex;align-items:center;justify-content:center;
  color:#fff;font-weight:800;font-size:12px;flex-shrink:0;
  box-shadow:0 4px 10px rgba(59,130,246,.35);
}