/* ============================================================
   DPS6.COM — Brand stylesheet
   Palette: ATF Red #C8102E · Graphite #23262B · Label White #F7F8F6
            Machined #DDE1E5 · Steel #8E959E · Heat Amber #F5A800
   Type:    Saira Condensed (display) · IBM Plex Sans (body)
            IBM Plex Mono (specs, steps, part numbers)
   ============================================================ */

:root{
  --atf-red:#C8102E;
  --atf-red-dark:#A50D26;
  --graphite:#23262B;
  --steel:#8E959E;
  --machined:#DDE1E5;
  --label-white:#F7F8F6;
  --heat-amber:#F5A800;
  --ink:#1A1C1F;
  --pass:#1E7A34;
  --maxw:1040px;
}

*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{transition:none!important;animation:none!important;}
}

body{
  font-family:'IBM Plex Sans',sans-serif;
  background:var(--label-white);
  color:var(--ink);
  font-size:16px;
  line-height:1.55;
}

.disp{font-family:'Saira Condensed',sans-serif;text-transform:uppercase;}
.mono{font-family:'IBM Plex Mono',monospace;}

a{color:var(--graphite);text-decoration:underline;text-decoration-color:var(--machined);text-underline-offset:3px;}
a:hover{color:var(--atf-red);text-decoration-color:var(--atf-red);}
a:focus-visible, button:focus-visible, input:focus-visible{
  outline:3px solid var(--atf-red);outline-offset:2px;
}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}

/* ---------- hazard stripe (site-wide signature) ---------- */
.hazard{
  height:10px;
  background:repeating-linear-gradient(-45deg,var(--atf-red) 0 18px,var(--label-white) 18px 24px);
}

/* ---------- header / nav ---------- */
.site-header{background:var(--graphite);color:var(--label-white);}
.nav{
  display:flex;align-items:center;justify-content:space-between;
  gap:20px;padding:16px 24px;max-width:var(--maxw);margin:0 auto;
}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;}
.brand:hover{color:inherit;}
.brand .wordmark{
  font-family:'Saira Condensed',sans-serif;font-weight:800;text-transform:uppercase;
  font-size:26px;letter-spacing:.02em;color:var(--label-white);line-height:1;
}
.brand .wordmark .six{color:var(--atf-red);}
.brand .wordmark .tld{font-size:15px;color:var(--steel);}
.nav-links{display:flex;gap:22px;list-style:none;}
.nav-links a{
  font-family:'IBM Plex Mono',monospace;font-size:12px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--machined);text-decoration:none;
}
.nav-links a:hover, .nav-links a[aria-current="page"]{color:var(--label-white);border-bottom:2px solid var(--atf-red);}

/* ---------- buttons ---------- */
.btn{
  display:inline-block;font-family:'Saira Condensed',sans-serif;font-weight:700;
  text-transform:uppercase;letter-spacing:.06em;font-size:17px;
  padding:13px 26px;border:none;border-radius:2px;cursor:pointer;text-decoration:none;
}
.btn-red{background:var(--atf-red);color:#fff;}
.btn-red:hover{background:var(--atf-red-dark);color:#fff;}
.btn-ghost{background:transparent;color:var(--label-white);border:2px solid var(--steel);}
.btn-ghost:hover{border-color:var(--label-white);color:var(--label-white);}
.btn-ghost.on-light{color:var(--graphite);border-color:var(--graphite);}
.btn-ghost.on-light:hover{color:var(--atf-red);border-color:var(--atf-red);}

/* ---------- hero ---------- */
.hero{background:var(--graphite);color:var(--label-white);padding:64px 0 56px;}
.hero .eyebrow{
  font-family:'IBM Plex Mono',monospace;font-size:12px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--heat-amber);margin-bottom:16px;
}
.hero h1{
  font-family:'Saira Condensed',sans-serif;font-weight:800;text-transform:uppercase;
  font-size:clamp(44px,8vw,84px);line-height:.92;letter-spacing:.01em;max-width:14ch;
}
.hero h1 .red{color:var(--atf-red);}
.hero .sub{margin-top:18px;color:var(--steel);max-width:52ch;font-size:17px;}
.hero .cta-row{margin-top:30px;display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- section scaffolding ---------- */
section{padding:64px 0;}
.sechead{
  display:flex;align-items:baseline;gap:14px;
  border-bottom:3px solid var(--graphite);padding-bottom:10px;margin-bottom:28px;
}
.sechead .tag{font-family:'IBM Plex Mono',monospace;font-size:12px;letter-spacing:.14em;color:var(--atf-red);text-transform:uppercase;}
h2{font-family:'Saira Condensed',sans-serif;font-weight:700;text-transform:uppercase;font-size:30px;letter-spacing:.02em;}
h3{font-family:'Saira Condensed',sans-serif;font-weight:600;text-transform:uppercase;font-size:20px;letter-spacing:.03em;margin-bottom:10px;}
.note{color:#4A4F56;max-width:68ch;}

/* ---------- symptom checker ---------- */
.symptoms{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;}
.symptom{
  background:#fff;border:1px solid var(--machined);padding:20px;
  border-top:4px solid var(--atf-red);
}
.symptom .k{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--atf-red);margin-bottom:8px;}
.symptom p{font-size:14.5px;color:#3E434A;}

/* ---------- DTC code cards ---------- */
.code-list{display:grid;gap:12px;}
.code-card{
  display:grid;grid-template-columns:110px 1fr auto;gap:18px;align-items:center;
  background:#fff;border:1px solid var(--machined);padding:18px 20px;text-decoration:none;
}
.code-card:hover{border-color:var(--atf-red);color:inherit;}
.code-card .dtc{
  font-family:'IBM Plex Mono',monospace;font-weight:500;font-size:20px;
  color:var(--atf-red);letter-spacing:.04em;
}
.code-card .ttl{font-family:'Saira Condensed',sans-serif;font-weight:600;text-transform:uppercase;font-size:17px;}
.code-card .desc{font-size:13.5px;color:#5A6068;margin-top:2px;}
.code-card .meta{
  font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--steel);
  text-align:right;letter-spacing:.08em;text-transform:uppercase;white-space:nowrap;
}
@media (max-width:640px){
  .code-card{grid-template-columns:1fr;gap:6px;}
  .code-card .meta{text-align:left;}
}

/* search input on code library */
.code-search{
  width:100%;padding:14px 16px;font-family:'IBM Plex Mono',monospace;font-size:15px;
  border:2px solid var(--graphite);border-radius:2px;background:#fff;margin-bottom:22px;
}
.code-search::placeholder{color:var(--steel);}

/* ---------- ARTICLE: diagnostic layout ---------- */
.article-head{background:var(--graphite);color:var(--label-white);padding:48px 0 40px;}
.article-head .dtc-big{
  font-family:'IBM Plex Mono',monospace;font-size:15px;letter-spacing:.14em;
  color:var(--heat-amber);margin-bottom:12px;text-transform:uppercase;
}
.article-head h1{
  font-family:'Saira Condensed',sans-serif;font-weight:800;text-transform:uppercase;
  font-size:clamp(34px,6vw,58px);line-height:.95;max-width:22ch;
}
.article-head .fitline{
  margin-top:16px;font-family:'IBM Plex Mono',monospace;font-size:12px;
  letter-spacing:.1em;color:var(--steel);text-transform:uppercase;
}
.factbar{
  display:flex;gap:28px;flex-wrap:wrap;margin-top:24px;
}
.fact{border-left:3px solid var(--atf-red);padding-left:10px;}
.fact .k{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.12em;color:var(--steel);text-transform:uppercase;}
.fact .v{font-family:'Saira Condensed',sans-serif;font-weight:700;font-size:17px;text-transform:uppercase;color:var(--label-white);}

.article-body{max-width:760px;margin:0 auto;padding:48px 24px 80px;}
.article-body p{margin-bottom:18px;max-width:68ch;}
.article-body h2{margin:44px 0 16px;border-bottom:3px solid var(--graphite);padding-bottom:8px;}
.article-body ul{margin:0 0 18px 22px;}
.article-body li{margin-bottom:6px;}

/* tools required table */
.tools{
  width:100%;border-collapse:collapse;margin-bottom:8px;background:#fff;
  border:1px solid var(--machined);font-size:14.5px;
}
.tools th{
  font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.12em;
  text-transform:uppercase;text-align:left;color:var(--steel);
  padding:10px 14px;border-bottom:2px solid var(--graphite);
}
.tools td{padding:10px 14px;border-bottom:1px solid var(--machined);}
.tools tr:last-child td{border-bottom:none;}
.tools .mono{font-size:13px;}

/* ---------- pinpoint test steps (site signature) ---------- */
.step{
  background:#fff;border:1px solid var(--machined);margin-bottom:18px;
  border-left:5px solid var(--graphite);
}
.step-head{
  display:flex;align-items:baseline;gap:14px;padding:14px 18px;
  border-bottom:1px dashed var(--machined);
}
.step-no{
  font-family:'IBM Plex Mono',monospace;font-weight:500;font-size:13px;
  color:var(--atf-red);letter-spacing:.1em;white-space:nowrap;
}
.step-title{font-family:'Saira Condensed',sans-serif;font-weight:700;text-transform:uppercase;font-size:18px;}
.step-body{padding:16px 18px;}
.step-body p{margin-bottom:12px;font-size:15px;}
.spec-readout{
  font-family:'IBM Plex Mono',monospace;font-size:13.5px;background:var(--label-white);
  border:1px solid var(--machined);padding:10px 14px;margin:10px 0 14px;
  color:var(--graphite);
}
.spec-readout b{color:var(--atf-red);font-weight:500;}
.branch{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:6px;}
.branch>div{padding:10px 14px;font-size:13.5px;border-radius:2px;}
.branch .pass{background:#EAF4EC;border-left:4px solid var(--pass);}
.branch .fail{background:#FBEBEE;border-left:4px solid var(--atf-red);}
.branch .k{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;display:block;margin-bottom:3px;}
.branch .pass .k{color:var(--pass);}
.branch .fail .k{color:var(--atf-red);}
@media (max-width:560px){.branch{grid-template-columns:1fr;}}

/* remedy panel */
.remedy{
  background:var(--graphite);color:var(--label-white);padding:26px 24px;margin:30px 0;
  border-top:6px solid var(--atf-red);
}
.remedy h3{color:var(--label-white);}
.remedy p{color:var(--machined);font-size:15px;}
.remedy .btn{margin-top:14px;}

/* amber caution */
.caution{
  border:1px solid var(--heat-amber);background:#FFF8E7;color:#5A4A12;
  padding:16px 18px;font-size:14px;margin:20px 0;
}
.caution b{color:#3E3208;}

/* ---------- affiliate links ---------- */
.aff{
  display:inline-block;font-family:'IBM Plex Mono',monospace;font-size:11.5px;
  letter-spacing:.06em;text-transform:uppercase;text-decoration:none;
  color:var(--graphite);border:1.5px solid var(--machined);border-radius:2px;
  padding:5px 10px;white-space:nowrap;
}
.aff::before{content:"⇱ ";color:var(--atf-red);}
.aff:hover{border-color:var(--atf-red);color:var(--atf-red);}
.disclosure{
  font-size:12.5px;color:#6B7178;border-left:3px solid var(--machined);
  padding:8px 14px;margin:18px 0;max-width:70ch;
}

/* related parts cross-sell */
.parts{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;}
.part{background:#fff;border:1px solid var(--machined);padding:20px;}
.part .sku{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.1em;color:var(--steel);text-transform:uppercase;}
.part .nm{font-family:'Saira Condensed',sans-serif;font-weight:700;text-transform:uppercase;font-size:18px;margin:6px 0 4px;}
.part .pr{font-family:'IBM Plex Mono',monospace;font-size:15px;color:var(--atf-red);margin-bottom:12px;}

/* ---------- footer ---------- */
.site-footer{background:var(--graphite);color:var(--steel);margin-top:40px;}
.site-footer .inner{
  max-width:var(--maxw);margin:0 auto;padding:36px 24px;
  display:flex;flex-direction:column;gap:18px;font-size:13px;
}
.site-footer .rows{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;}
.site-footer a{color:var(--machined);}
.site-footer .legal{font-size:11.5px;line-height:1.6;max-width:90ch;color:#6B7178;}