/* ==========================================================================
   Synthetic Oil Performance - replica stylesheet
   Mobile-first, responsive
   Palette: AMSOIL blue + AMSOIL gold/yellow buttons
   ========================================================================== */
:root{
  --blue:#005baa;
  --blue-dark:#003d73;
  --yellow:#ffc72c;
  --yellow-dark:#e6ac00;
  --promo-red:#c8102e;      /* kept intentionally: original syntheticsusa.com promo-bar color */
  --dark:#1a1a1a;
  --gray-900:#333333;
  --gray-700:#4a4a4a;
  --gray-400:#8a8a8a;
  --gray-200:#e5e5e5;
  --gray-100:#f5f5f5;
  --white:#ffffff;
  --max-w:1200px;
  --radius:4px;
  --wrap-pad:24px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--gray-900);
  background:var(--gray-100);
  line-height:1.55;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--blue);text-decoration:none;}
a:hover{text-decoration:underline;}
h1,h2,h3,h4{line-height:1.2;margin:0 0 .5em;font-weight:800;color:var(--dark);}
h1{font-size:clamp(1.75rem,5vw,2.5rem);}
h2{font-size:clamp(1.4rem,4vw,1.9rem);}
h3{font-size:1.15rem;}
p{margin:0 0 1em;}
ul{margin:0;padding:0;list-style:none;}
.wrap{max-width:var(--max-w);margin:0 auto;padding:0 var(--wrap-pad);}

/* Buttons - primary = AMSOIL yellow/gold pill, secondary = blue outline */
.btn{
  display:inline-block;background:var(--yellow);color:var(--dark);padding:14px 28px;
  border-radius:999px;font-weight:800;font-size:.95rem;text-decoration:none;
  transition:background .15s ease;border:2px solid var(--yellow);
  text-transform:uppercase;letter-spacing:.02em;
}
.btn:hover{background:var(--yellow-dark);border-color:var(--yellow-dark);text-decoration:none;}
.btn-outline{background:transparent;color:var(--blue);border:2px solid var(--blue);padding:12px 26px;
  border-radius:999px;font-weight:800;text-transform:uppercase;letter-spacing:.02em;}
.btn-outline:hover{background:var(--blue);color:#fff;text-decoration:none;}
.btn-small{padding:10px 20px;font-size:.85rem;}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:1em;}

/* Header */
.site-header{background:var(--dark);color:#fff;}
.header-top{background:var(--gray-900);}
.header-top-inner{
  display:flex;align-items:center;justify-content:flex-start;
  padding:10px var(--wrap-pad);gap:12px;
}
.badge-link{display:flex;align-items:center;gap:6px;}
.badge-logo{height:36px;width:auto;}

.main-nav{background:var(--blue);position:relative;}
.nav-inner{display:flex;align-items:center;padding:6px var(--wrap-pad);position:relative;}
.nav-toggle{
  display:flex;flex-direction:column;justify-content:center;gap:5px;
  background:none;border:0;padding:10px;cursor:pointer;margin-left:auto;
}
.nav-toggle span{display:block;width:26px;height:3px;background:#fff;border-radius:2px;}

.nav-list{
  display:none;flex-direction:column;width:100%;
  background:var(--blue);
}
.nav-list.open{display:flex;}
.nav-list li{border-top:1px solid rgba(255,255,255,.15);position:relative;}
.nav-list > li > a{
  display:block;padding:14px var(--wrap-pad);color:#fff;font-weight:700;font-size:.95rem;
}
.nav-list > li > a:hover{background:rgba(0,0,0,.12);text-decoration:none;}
/* pipe separators between top-level items (ASCII character - renders everywhere) */
.nav-list > li:not(:last-child) > a::after{
  content:"|";margin-left:10px;opacity:.5;font-weight:400;
}
/* dropdown caret - CSS-drawn triangle, not a font glyph, so it always renders */
.has-dropdown > a{position:relative;}
.caret{
  display:inline-block;width:0;height:0;margin-left:6px;
  border-left:4px solid transparent;border-right:4px solid transparent;
  border-top:5px solid currentColor;vertical-align:middle;opacity:.85;
}
.dropdown,.mega-menu{display:none;background:rgba(0,0,0,.12);}
.has-dropdown.open > .dropdown,
.has-dropdown.open > .mega-menu{display:block;}
/* Nested lists inside a mega-menu column are ALWAYS visible once the
   mega-menu itself is shown - they are not separately toggled. */
.mega-menu .dropdown{display:block !important;background:transparent;}
.dropdown li a,.mega-col li a{
  padding:10px var(--wrap-pad) 10px 36px;font-size:.88rem;color:#f0f0f0;font-weight:400;display:block;
}
.dropdown li a:hover,.mega-col li a:hover{background:rgba(0,0,0,.15);text-decoration:none;}
.mega-menu{padding:6px 0;}
.mega-col h4{color:#fff;font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;
  padding:10px var(--wrap-pad) 4px 36px;margin:0;opacity:.85;}

/* Promo banner - blue bar with rounded corners (not a full pill), sized
   between the original narrow card and a full-bleed bar, with a compact
   rounded "Shop Now" button and a strong drop shadow to stand out. */
.promo-banner-wrap{padding:14px var(--wrap-pad) 4px;}
.promo-banner{
  max-width:900px;margin:0 auto;background:var(--blue-dark);color:#fff;
  border-radius:18px;box-shadow:0 12px 26px rgba(0,0,0,.45);
  display:flex;flex-direction:column;gap:14px;align-items:center;justify-content:center;
  text-align:center;padding:18px 24px;
}
.promo-text{display:flex;flex-direction:column;gap:2px;font-weight:800;}
.promo-text .promo-free{color:var(--yellow);font-size:2rem;line-height:1.15;font-style:italic;}
.promo-text .promo-rest{color:#fff;font-size:1.5rem;line-height:1.2;}
.promo-banner .btn{
  padding:12px 26px;font-size:1.05rem;text-transform:uppercase;letter-spacing:.03em;
  border-radius:10px;border:3px solid var(--dark);color:var(--dark);
}

/* Hero */
.hero{background:#fff;padding:32px 0 8px;text-align:center;}
.hero-inner h1{margin-bottom:.6em;}
.hero-links{display:flex;flex-wrap:wrap;justify-content:center;gap:18px;margin-bottom:1.2em;}
.hero-links a{font-weight:700;color:var(--blue);}
.hero-img{margin:0 auto;max-width:520px;}

/* Lookup grid */
.lookup-section{padding:36px 0;text-align:center;}
.lookup-section h2{margin-bottom:1em;}
.lookup-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:14px;
}
.lookup-item{
  display:flex;align-items:center;justify-content:center;background:#fff;
  border-radius:var(--radius);padding:18px 8px;font-weight:700;font-size:.85rem;color:var(--gray-900);
  text-align:center;border:1px solid var(--gray-200);box-shadow:0 3px 10px rgba(0,0,0,.06);
}
.lookup-item:hover{background:var(--gray-200);text-decoration:none;}

/* Feature block (image + copy) */
.feature-block{
  display:flex;flex-direction:column;gap:20px;padding:36px 0;align-items:center;
}
.feature-media img{border-radius:var(--radius);}
.feature-copy h2{margin-bottom:0;}
.feature-copy h3{color:var(--blue);font-weight:700;margin-bottom:.6em;}

/* Business opportunities grid */
.biz-opps{padding:36px 0;text-align:center;}
.biz-grid{display:grid;grid-template-columns:1fr;gap:24px;margin-top:20px;text-align:left;}
.biz-card{background:#fff;border-radius:12px;padding:18px;box-shadow:0 4px 14px rgba(0,0,0,.08);border:1px solid rgba(0,0,0,.04);}
.biz-card img{border-radius:var(--radius);margin-bottom:12px;}

/* Why AMSOIL */
.why-amsoil{background:#fff;padding:36px 0;}
.why-inner{display:flex;flex-direction:column;gap:20px;align-items:center;text-align:center;}

/* Category / product pages */
.breadcrumb{font-size:.82rem;color:var(--gray-400);padding:14px var(--wrap-pad);}
.breadcrumb a{color:var(--gray-400);}
.page-hero{padding:10px var(--wrap-pad) 20px;}
.lede{max-width:800px;}
.replacement-note{font-size:.88rem;color:var(--gray-700);font-style:italic;}
.product-section{padding:26px 0;border-top:1px solid var(--gray-200);}
.product-section h2{font-size:1.6rem;text-align:center;margin-bottom:20px;}
.product-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:16px;
}
.product-card{
  background:#fff;border-radius:12px;padding:16px 12px 18px;text-align:center;
  display:flex;flex-direction:column;box-shadow:0 4px 14px rgba(0,0,0,.08);
  border:1px solid rgba(0,0,0,.04);
}
.product-card img{margin:0 auto 12px;max-height:220px;width:100%;object-fit:contain;}
.product-card h3{font-size:1.02rem;margin-bottom:12px;flex-grow:1;line-height:1.35;font-weight:800;}
.product-card h3 a{color:var(--gray-900);}
.product-card .btn{
  width:auto;display:inline-block;margin:0 auto;padding:8px 22px;font-size:.85rem;
  text-transform:none;letter-spacing:normal;
  background:var(--blue-dark);border-color:var(--blue-dark);color:#fff;
}
.product-card .btn:hover{background:#002b52;border-color:#002b52;}
.empty-note{color:var(--gray-400);font-style:italic;}

/* CTA / two-col / three-col generic sections */
.cta-block{padding:26px 0;text-align:center;}
.cta-block img{margin:0 auto 16px;border-radius:var(--radius);max-width:340px;}
.two-col{display:grid;grid-template-columns:1fr;gap:24px;padding:26px 0;border-top:1px solid var(--gray-200);}
.three-col{display:grid;grid-template-columns:1fr;gap:24px;padding:26px 0;border-top:1px solid var(--gray-200);}
.mini-card img{border-radius:var(--radius);margin-bottom:10px;}
.check-list{margin-top:8px;}
.check-list li{
  padding:10px 0 10px 32px;position:relative;border-bottom:1px solid var(--gray-200);
  line-height:1.4;
}
.check-list li::before{
  content:"\2713";position:absolute;left:0;top:9px;color:var(--blue);font-weight:800;font-size:1.1em;
  line-height:1;
}

/* Preferred customer perks - styled like the product cards: big image,
   white rounded card with shadow, all-caps title */
.perk-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:20px 0;}
.perk{
  display:flex;flex-direction:column;align-items:center;text-align:center;gap:10px;
  background:#fff;border-radius:12px;padding:20px 14px;color:var(--gray-900);
  box-shadow:0 4px 14px rgba(0,0,0,.08);border:1px solid rgba(0,0,0,.04);
}
.perk img{max-height:150px;width:auto;max-width:85%;object-fit:contain;margin:0 auto;}
.perk-desc{font-size:1.5rem;color:var(--gray-900);font-weight:700;line-height:1.35;}
.magazine-note{font-weight:700;}
.video-block{padding:26px 0;border-top:1px solid var(--gray-200);}
.video-embed{
  position:relative;padding-top:56.25%;height:0;border-radius:var(--radius);overflow:hidden;
  background:#000;margin-bottom:14px;
}
.video-embed iframe{position:absolute;inset:0;width:100%;height:100%;border:0;}
.cart-note{font-weight:700;color:var(--blue);}

/* Simple pages (about/contact/terms/privacy) */
.simple-page{max-width:760px;padding-bottom:50px;}

/* Footer */
.site-footer{background:var(--gray-900);color:#ddd;margin-top:20px;}
.footer-inner{padding:28px var(--wrap-pad);text-align:center;}
.footer-links ul{
  display:flex;flex-wrap:wrap;justify-content:center;gap:16px;margin-bottom:16px;
}
.footer-links a{color:#ddd;font-size:.85rem;font-weight:600;}
.footer-links a:hover{color:#fff;}
.footer-copy{font-size:.78rem;color:#999;margin:0;}

/* ==========================================================================
   Tablet / Desktop
   ========================================================================== */
@media (min-width:640px){
  .lookup-grid{grid-template-columns:repeat(3,1fr);}
  .product-grid{grid-template-columns:repeat(3,1fr);}
  .perk-grid{grid-template-columns:repeat(3,1fr);}
  .two-col{grid-template-columns:1fr 1fr;}
  .three-col{grid-template-columns:repeat(3,1fr);}
  .biz-grid{grid-template-columns:repeat(3,1fr);}
}

@media (min-width:1000px){
  .product-grid{grid-template-columns:repeat(4,1fr);}
}

@media (min-width:900px){
  :root{--wrap-pad:20px;}
  .nav-toggle{display:none;}
  .nav-inner{padding:0 var(--wrap-pad);}
  .nav-list{
    display:flex !important;flex-direction:row;width:auto;background:transparent;
    position:relative;
  }
  .nav-list li{border-top:0;position:relative;}
  .nav-list > li > a{padding:16px 14px;font-size:.88rem;}
  .dropdown,.mega-menu{
    position:absolute;top:100%;left:0;min-width:230px;background:var(--blue-dark);
    box-shadow:0 8px 18px rgba(0,0,0,.25);z-index:30;border-radius:0 0 var(--radius) var(--radius);
  }
  /* Plain dropdowns (Lubricants, Business Opportunities) stack vertically */
  .has-dropdown:hover > .dropdown{display:block;}
  /* Mega-menu (Motor Oil) lays its columns out side by side */
  .mega-menu{display:none;min-width:480px;padding:14px 0;}
  .has-dropdown:hover > .mega-menu{display:flex;}
  .mega-menu .dropdown{display:block !important;position:static;box-shadow:none;background:transparent;min-width:0;}
  .mega-col{flex:1;}
  .dropdown li a,.mega-col li a{padding:9px 20px;}
  .mega-col h4{padding:6px 20px 4px;}

  .hero-links{gap:34px;}
  .feature-block{flex-direction:row;text-align:left;gap:40px;}
  .feature-block.reverse{flex-direction:row-reverse;}
  .feature-media,.feature-copy{flex:1;}
  .why-inner{flex-direction:row;text-align:left;gap:40px;}
  .why-inner img{flex:1;max-width:520px;}
  .why-inner > div{flex:1;}
  .cta-block{display:flex;align-items:center;gap:30px;text-align:left;}
  .cta-block img{margin:0;flex-shrink:0;}
}

@media (min-width:1000px){
  .header-top-inner{padding:12px var(--wrap-pad);}
  .promo-banner{flex-direction:row;text-align:left;padding:18px 30px;gap:32px;justify-content:center;}
  .promo-text{text-align:left;}
}