/* ============================================================================
   EliteSyntheticOil.com — Shared Modern Stylesheet
   ----------------------------------------------------------------------------
   Palette: AMSOIL-inspired red + deep navy, clean neutrals.
   System font stack (no external requests = fast, works offline).
   ============================================================================ */

:root{
  --red-050:#fdecee;
  --red-100:#f9d3d8;
  --red-600:#c8102e;
  --red-700:#a80d27;
  --navy-800:#12324c;
  --navy-900:#0b2236;
  --ink:#1e293b;
  --muted:#5b6b7c;
  --line:#e2e8f0;
  --surface:#ffffff;
  --bg:#f3f6fa;
  --gold:#f4b400;
  --radius:12px;
  --shadow:0 1px 3px rgba(15,33,56,.08),0 8px 24px rgba(15,33,56,.06);
  --container:1140px;
}

*{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;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;}
a{color:var(--red-600);text-decoration:none;}
a:hover{text-decoration:underline;}

/* Accessible skip link */
.skip-link{
  position:absolute;left:-999px;top:0;
  background:var(--navy-900);color:#fff;padding:.6rem 1rem;z-index:1000;
  border-radius:0 0 8px 0;
}
.skip-link:focus{left:0;text-decoration:none;}

.container{max-width:var(--container);margin:0 auto;padding:0 1.25rem;}
.visually-hidden{
  position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;
  clip:rect(0 0 0 0);white-space:nowrap;
}

/* ============================= Header ==================================== */
.site-header{background:var(--navy-900);color:#eaf1f6;}
.topbar{background:var(--red-600);color:#fff;font-size:.85rem;}
.topbar .container{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding-top:.4rem;padding-bottom:.4rem;}
.topbar a{color:#fff;}
.topbar .phone{font-weight:700;letter-spacing:.02em;}
.header-main{display:flex;align-items:center;gap:1.25rem;padding:1rem 1.25rem;flex-wrap:wrap;}
.brand{display:flex;align-items:center;gap:.9rem;text-decoration:none;color:#fff;}
.brand:hover{text-decoration:none;}
.brand-logo{height:56px;width:auto;border-radius:6px;background:#fff;padding:.25rem;}
.brand-name{font-size:1.35rem;font-weight:800;letter-spacing:.01em;margin:0;color:#fff;}
.brand-tagline{font-size:.8rem;color:#bcd0df;margin:0;}
.header-cta{margin-left:auto;display:flex;align-items:center;gap:1rem;flex-wrap:wrap;}

/* ============================= Navigation ================================ */
.site-nav{background:var(--red-600);}
.site-nav ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:0;}
.site-nav li{position:relative;}
.site-nav a{
  display:block;color:#fff;padding:.85rem 1.1rem;font-weight:600;font-size:.95rem;
  text-decoration:none;transition:background .15s;
}
.site-nav a:hover,.site-nav a:focus{background:var(--red-700);text-decoration:none;}
.nav-toggle{
  display:none;background:var(--red-600);color:#fff;border:0;font-size:1.25rem;
  padding:.6rem .9rem;cursor:pointer;width:100%;text-align:left;font-weight:600;
}

/* ============================= Layout ==================================== */
.page{background:var(--surface);}
.breadcrumb{font-size:.85rem;color:var(--muted);padding:1rem 1.25rem 0;}
.breadcrumb ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:.35rem;}
.breadcrumb li+li::before{content:"›";margin-right:.35rem;color:#94a3b8;}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--red-600);}

.page-head{background:linear-gradient(135deg,var(--navy-900),#1b4a72);color:#fff;padding:2.25rem 1.25rem 1.5rem;}
.page-head .container{max-width:var(--container);}
.page-head h1{margin:.25rem 0 .5rem;font-size:clamp(1.6rem,4vw,2.4rem);line-height:1.2;color:#fff;}
.page-head p{margin:0;color:#c7d8e6;max-width:64ch;}

.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:2rem;padding:2rem 1.25rem 3rem;align-items:start;}
.layout-main{min-width:0;}
.sidebar{position:sticky;top:1rem;display:flex;flex-direction:column;gap:1.5rem;}

.content{font-size:1.02rem;}
.content h2{color:var(--navy-900);margin:1.6em 0 .5em;font-size:1.45rem;border-bottom:2px solid var(--line);padding-bottom:.35em;}
.content h3{color:var(--navy-900);margin:1.4em 0 .4em;font-size:1.15rem;}
.content p{margin:0 0 1em;}
.content ul,.content ol{margin:0 0 1.1em;padding-left:1.4rem;}
.content li{margin:.25rem 0;}
.content img.center{display:block;margin:1.25rem auto;border-radius:var(--radius);box-shadow:var(--shadow);}
.content figure{margin:1.25rem 0;text-align:center;}
.content figcaption{font-size:.85rem;color:var(--muted);margin-top:.5rem;}

/* ============================= Cards / grid ============================== */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:1.25rem;margin:1.25rem 0;}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:1.25rem;box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s;
}
.card:hover{transform:translateY(-3px);box-shadow:0 6px 18px rgba(15,33,56,.12);}
.card h3{margin:.4em 0 .3em;font-size:1.05rem;}
.card p{margin:0;font-size:.92rem;color:var(--muted);}
.card img.card-img{display:block;margin:0 auto .75rem;max-height:150px;object-fit:contain;}
.card a.stretched{color:var(--red-600);font-weight:600;font-size:.9rem;display:inline-block;margin-top:.5rem;text-decoration:none;}
.card a.stretched:hover{text-decoration:underline;}

.feature-band{background:var(--navy-800);color:#eaf1f6;border-radius:var(--radius);padding:1.75rem;margin:1.5rem 0;}
.feature-band h2{color:#fff;border:0;margin-top:0;}
.feature-band p{margin:0 0 .75rem;color:#c7d8e6;}
.feature-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:1rem;list-style:none;padding:0;margin:1rem 0 0;}
.feature-list li{background:rgba(255,255,255,.06);border-radius:8px;padding:.9rem 1rem;font-size:.95rem;}
.feature-list strong{color:#fff;display:block;margin-bottom:.15rem;}

/* ============================= Call-outs ================================= */
.callout{border-left:4px solid var(--red-600);background:#fdecee;padding:1rem 1.25rem;border-radius:0 8px 8px 0;margin:1.25rem 0;}
.callout p{margin:0;}
.callout.success{border-color:#16a34a;background:#f0fdf4;}
.note{font-size:.9rem;color:var(--muted);}
.code{font-weight:700;color:var(--red-600);font-family:var(--mono,ui-monospace,SFMono-Regular,Menlo,Consolas,monospace);}

/* ============================= Tables ==================================== */
.table-wrap{overflow-x:auto;margin:1.25rem 0;}
table.data{width:100%;border-collapse:collapse;font-size:.95rem;}
table.data th,table.data td{border:1px solid var(--line);padding:.6rem .8rem;text-align:left;}
table.data thead th{background:var(--navy-900);color:#fff;}
table.data tbody tr:nth-child(even){background:#f8fafc;}
table.data .num{text-align:right;font-variant-numeric:tabular-nums;}
table.data tfoot td{background:#f1f5f9;font-weight:700;}

/* ============================= Buttons / forms =========================== */
.btn{
  display:inline-block;background:var(--red-600);color:#fff;padding:.6rem 1.25rem;
  border-radius:8px;font-weight:600;border:0;cursor:pointer;text-decoration:none;font-size:.95rem;
  transition:background .15s,transform .1s;
}
.btn:hover{background:var(--red-700);text-decoration:none;transform:translateY(-1px);}
.btn.navy{background:var(--navy-800);}
.btn.navy:hover{background:var(--navy-900);}

form.styled label{display:block;margin:.8rem 0 .25rem;font-weight:600;font-size:.9rem;}
form.styled input,form.styled textarea,form.styled select{
  width:100%;padding:.6rem .75rem;border:1px solid var(--line);border-radius:8px;font:inherit;
  background:#fff;color:var(--ink);
}
form.styled input:focus,form.styled textarea:focus{border-color:var(--red-600);outline:2px solid var(--red-100);}
form.styled .btn{width:auto;margin-top:1rem;}

/* Form grouping helpers (filter request page) */
.field-row{display:flex;flex-direction:column;margin:0 0 1rem;}
.field-pair{display:grid;grid-template-columns:1fr 1fr;gap:1.25rem;margin:0 0 1rem;}
.field-pair>div{display:flex;flex-direction:column;}
form.styled fieldset{border:1px solid var(--line);border-radius:8px;padding:1rem 1.25rem;margin:1.25rem 0;}
form.styled fieldset>legend{font-weight:700;color:var(--navy-900);font-size:1.05rem;padding:0 .4rem;}
@media (max-width:720px){
  .field-pair{grid-template-columns:1fr;}
}

/* ============================= Sitemap =================================== */
.sitemap-list{list-style:none;margin:0 0 1.4rem;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:.4rem 1.2rem;}
.sitemap-list li{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:.55rem .8rem;font-size:.95rem;box-shadow:var(--shadow);}
.sitemap-list a{color:var(--red-600);font-weight:600;}
.sitemap-list a:hover{text-decoration:underline;}

/* ============================= FAQ ======================================= */
details.faq{background:var(--surface);border:1px solid var(--line);border-radius:8px;margin:.6rem 0;padding:.2rem .9rem;}
details.faq summary{cursor:pointer;padding:.7rem 0;font-weight:600;color:var(--navy-900);}
details.faq[open]{border-color:var(--red-100);}

/* ============================= Sidebar widgets =========================== */
.widget{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.25rem;box-shadow:var(--shadow);}
.widget h2{font-size:1.05rem;color:var(--navy-900);margin-top:0;border-bottom:2px solid var(--line);padding-bottom:.5rem;}
.widget ul{list-style:none;margin:0;padding:0;}
.widget li{margin:.35rem 0;font-size:.95rem;}
.widget li a{color:var(--red-600);}
.widget.cta{background:linear-gradient(160deg,var(--red-600),var(--red-700));color:#fff;border:0;}
.widget.cta h2{color:#fff;border-color:rgba(255,255,255,.35);}
.widget.cta p{color:#ffeef0;font-size:.92rem;}
.widget.cta .btn{background:#fff;color:var(--red-700);}
.widget.cta .btn:hover{background:var(--bg);}

/* ============================= Footer ==================================== */
.site-footer{background:var(--navy-900);color:#b9cbd9;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:2rem;padding:2.5rem 1.25rem;}
.footer-grid h3{color:#fff;font-size:1rem;margin:0 0 .9rem;text-transform:uppercase;letter-spacing:.04em;}
.footer-grid ul{list-style:none;margin:0;padding:0;}
.footer-grid li{margin:.35rem 0;}
.footer-grid a{color:#b9cbd9;}
.footer-grid a:hover{color:#fff;}
.footer-bottom{background:var(--navy-900);border-top:1px solid rgba(255,255,255,.08);padding:1.25rem;font-size:.85rem;text-align:center;color:#8fa6b8;}
.footer-bottom p{margin:.3rem 0;}
.footer-bottom a{color:#d6e2ec;}

/* ============================= Hero (home) =============================== */
.hero{background:linear-gradient(135deg,var(--navy-900) 0%,#1b4a72 60%,#25608f 100%);color:#fff;}
.hero .container{display:grid;grid-template-columns:1.2fr .8fr;gap:2rem;align-items:center;padding-top:2.5rem;padding-bottom:2.5rem;}
.hero h1{font-size:clamp(1.8rem,4.5vw,2.9rem);line-height:1.15;margin:0 0 .6rem;color:#fff;}
.hero p.lead{font-size:1.15rem;color:#d5e4ef;max-width:54ch;margin:0 0 1.5rem;}
.hero .btn{font-size:1rem;padding:.8rem 1.6rem;margin-right:.6rem;}
.hero .hero-media{text-align:center;}
.hero .hero-media img{border-radius:var(--radius);box-shadow:0 10px 40px rgba(0,0,0,.35);}

.hero-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem;margin-top:2rem;}
.hero-stats div{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);border-radius:10px;padding:1rem 1.1rem;}
.hero-stats strong{display:block;font-size:1.5rem;color:#fff;}
.hero-stats span{font-size:.82rem;color:#c4d8e6;}

.section{padding:3rem 1.25rem;}
.section .container{max-width:var(--container);}
.section-head{text-align:center;max-width:720px;margin:0 auto 2rem;}
.section-head h2{font-size:clamp(1.5rem,3.5vw,2rem);color:var(--navy-900);margin:0 0 .5rem;}
.section-head p{color:var(--muted);margin:0;}

.two-col{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem;}

/* ============================= Responsive ================================ */
@media (max-width:860px){
  .layout{grid-template-columns:1fr;}
  .sidebar{position:static;order:2;}
  .hero .container{grid-template-columns:1fr;text-align:center;}
  .hero p.lead{margin-left:auto;margin-right:auto;}
  .header-cta{margin-left:0;width:100%;justify-content:space-between;}
}
@media (max-width:720px){
  .site-nav ul{display:none;flex-direction:column;}
  .site-nav.open ul{display:flex;}
  .nav-toggle{display:block;}
  .brand-name{font-size:1.1rem;}
  .brand-logo{height:44px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important;}
}