/* BuildAPCGuide — light theme
   Navy #1e2a5a (header, headings) · Orange #f5820d (accents, CTAs)
   White / light-neutral backgrounds, dark slate body text. */
:root{
  --navy:#1e2a5a;
  --navy-deep:#141d42;
  --orange:#f5820d;
  --orange-dark:#cf6a05;
  --orange-soft:#fff3e4;
  --ink:#232b36;
  --muted:#5c6675;
  --faint:#8b95a5;
  --bg:#ffffff;
  --soft:#f5f7fb;
  --softer:#edf1f7;
  --border:#e2e7f0;
  --radius:12px;
  --shadow:0 2px 12px rgba(30,42,90,.08);
  --max:1120px;
  --prose:760px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,Helvetica,Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.65;
  font-size:17px;
}
img{max-width:100%;height:auto}
a{color:var(--navy);text-underline-offset:2px}
a:hover{color:var(--orange-dark)}
h1,h2,h3,h4{color:var(--navy);line-height:1.25;letter-spacing:-.01em}
h1{font-size:2.1rem;margin:0 0 .6rem}
h2{font-size:1.55rem;margin:2.2rem 0 .7rem}
h3{font-size:1.2rem;margin:1.6rem 0 .5rem}
p{margin:0 0 1rem}
ul,ol{margin:0 0 1rem;padding-left:1.4rem}
li{margin-bottom:.35rem}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.prose{max-width:var(--prose);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px;top:0;background:var(--orange);color:#fff;padding:8px 14px;z-index:200}
.skip:focus{left:8px;top:8px}

/* ---------- header ---------- */
.site-header{
  background:var(--navy);
  color:#fff;
  position:sticky;top:0;z-index:100;
  box-shadow:0 2px 10px rgba(0,0,0,.18);
}
.header-inner{
  max-width:var(--max);margin:0 auto;
  display:flex;align-items:center;gap:14px;
  padding:10px 20px;
}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:#fff}
.logo-badge{background:#fff;border-radius:10px;padding:3px;display:inline-flex;line-height:0}
.logo-badge img{width:38px;height:38px;border-radius:7px;display:block}
.wordmark{font-size:1.3rem;font-weight:800;letter-spacing:-.02em;white-space:nowrap}
.wordmark em{font-style:normal;color:var(--orange)}
.main-nav{margin-left:auto}
.main-nav ul{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
.main-nav a{
  color:#fff;text-decoration:none;font-weight:600;font-size:.98rem;
  padding:9px 12px;border-radius:8px;display:inline-block;
}
.main-nav a:hover{background:rgba(255,255,255,.12);color:#fff}
.main-nav a.active{background:var(--orange);color:#fff}
.has-sub{position:relative}
.sub-menu{
  display:none;position:absolute;top:100%;left:0;min-width:210px;
  background:#fff;border:1px solid var(--border);border-radius:10px;
  box-shadow:var(--shadow);padding:6px;list-style:none;z-index:120;
}
.has-sub:hover .sub-menu,.has-sub:focus-within .sub-menu{display:block}
.sub-menu a{color:var(--navy);display:block;padding:9px 12px;font-size:.95rem}
.sub-menu a:hover{background:var(--soft);color:var(--navy)}
.sub-menu .price{color:var(--faint);font-weight:400;font-size:.85rem}
.menu-toggle{
  display:none;margin-left:auto;background:none;border:2px solid rgba(255,255,255,.4);
  color:#fff;border-radius:8px;padding:7px 12px;font-size:1rem;font-weight:700;cursor:pointer;
}

/* ---------- hero ---------- */
.hero{background:linear-gradient(180deg,var(--soft) 0%,#fff 100%);border-bottom:1px solid var(--border)}
.hero-inner{max-width:var(--max);margin:0 auto;padding:56px 20px 60px;text-align:center}
.hero-logo{
  width:120px;height:120px;border-radius:24px;background:#fff;
  border:1px solid var(--border);box-shadow:var(--shadow);
  padding:6px;margin:0 auto 20px;display:block;
}
.hero h1{font-size:2.4rem;margin-bottom:.7rem}
.hero .lede{font-size:1.15rem;color:var(--muted);max-width:640px;margin:0 auto 1.8rem}
.hero-ctas{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn{
  display:inline-block;background:var(--orange);color:#fff!important;
  font-weight:700;text-decoration:none;padding:13px 26px;border-radius:10px;
  border:none;cursor:pointer;font-size:1.02rem;transition:background .15s,transform .1s;
}
.btn:hover{background:var(--orange-dark);color:#fff}
.btn:active{transform:translateY(1px)}
.btn-navy{background:var(--navy)}
.btn-navy:hover{background:var(--navy-deep)}
.btn-outline{background:#fff;color:var(--navy)!important;border:2px solid var(--navy)}
.btn-outline:hover{background:var(--navy);color:#fff!important}
.btn-small{padding:8px 18px;font-size:.92rem}

/* ---------- sections / cards ---------- */
.section{padding:52px 0}
.section-alt{background:var(--soft);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.section-head{max-width:var(--prose);margin:0 auto 30px;text-align:center}
.section-head h2{margin-top:0}
.section-head p{color:var(--muted)}
.grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(270px,1fr))}
.card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:26px;display:flex;flex-direction:column;
}
.card h3{margin-top:0;color:var(--navy)}
.card .step-num{
  width:44px;height:44px;border-radius:50%;background:var(--navy);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.25rem;margin-bottom:14px;
}
.build-card{position:relative}
.build-card .tier{font-size:.85rem;font-weight:700;color:var(--orange);text-transform:uppercase;letter-spacing:.06em;margin-bottom:6px}
.build-card h3{font-size:1.45rem;margin:0 0 4px}
.build-card .price{font-size:1.6rem;font-weight:800;color:var(--navy);margin:4px 0 10px}
.build-card p{color:var(--muted);flex:1}
.build-card .btn{align-self:flex-start;margin-top:14px}
.why-icon{font-size:1.9rem;line-height:1;margin-bottom:10px}

/* ---------- callouts & notices ---------- */
.callout{
  border:1px solid #f3d9b8;border-left:5px solid var(--orange);
  background:var(--orange-soft);border-radius:10px;padding:18px 22px;margin:26px 0;
}
.callout h3,.callout h4{margin-top:0;color:var(--navy)}
.callout.navy{border-color:var(--navy);border-left-color:var(--navy);background:var(--soft)}
.price-note{
  font-size:.9rem;color:var(--muted);background:var(--soft);
  border:1px dashed var(--border);border-radius:10px;padding:12px 16px;margin:26px 0;
}

/* ---------- parts table ---------- */
.table-scroll{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);margin:20px 0}
.parts-table{width:100%;border-collapse:collapse;background:#fff;min-width:680px}
.parts-table th{
  background:var(--navy);color:#fff;text-align:left;font-size:.92rem;
  padding:13px 14px;white-space:nowrap;
}
.parts-table td{padding:14px;border-top:1px solid var(--border);vertical-align:top;font-size:.97rem}
.parts-table tr:nth-child(even) td{background:#fafbfe}
.parts-table .cat{font-weight:700;color:var(--navy);white-space:nowrap}
.parts-table .model{font-weight:600}
.parts-table .why{color:var(--muted);font-size:.9rem}
.parts-table .price{font-weight:800;color:var(--navy);white-space:nowrap}
.buy{
  display:inline-block;background:var(--orange);color:#fff!important;
  font-weight:700;font-size:.88rem;text-decoration:none;
  padding:8px 16px;border-radius:8px;white-space:nowrap;
}
.buy:hover{background:var(--orange-dark)}
.total-row td{font-weight:800;font-size:1.05rem;background:var(--soft)!important;border-top:2px solid var(--navy)}
.included{color:var(--muted);font-style:italic;font-size:.9rem}

/* ---------- assembly guide ---------- */
.step{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:26px;margin:0 0 22px;
}
.step h2{margin-top:0;display:flex;align-items:center;gap:12px}
.step .n{
  flex:0 0 auto;width:40px;height:40px;border-radius:50%;
  background:var(--orange);color:#fff;display:inline-flex;align-items:center;justify-content:center;
  font-size:1.15rem;font-weight:800;
}
.checklist{list-style:none;padding-left:0}
.checklist li{padding-left:32px;position:relative;margin-bottom:.6rem}
.checklist li::before{
  content:"☐";position:absolute;left:2px;top:0;color:var(--orange);font-size:1.15rem;line-height:1.5;
}
.trouble{border-left:4px solid var(--navy);background:var(--soft);border-radius:0 10px 10px 0;padding:16px 20px;margin:16px 0}
.trouble h4{margin:0 0 6px;color:var(--navy)}
.faq dt{font-weight:700;color:var(--navy);margin-top:1.2rem}
.faq dd{margin:.3rem 0 0;color:var(--ink)}

/* ---------- forms ---------- */
.form label{display:block;font-weight:600;margin:16px 0 6px;color:var(--navy)}
.form input[type=text],.form input[type=email],.form textarea{
  width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:8px;
  font-size:1rem;font-family:inherit;color:var(--ink);background:#fff;
}
.form input:focus,.form textarea:focus{outline:2px solid var(--orange);border-color:var(--orange)}
.form textarea{min-height:160px;resize:vertical}

/* ---------- footer ---------- */
.site-footer{background:var(--navy);color:#dfe4f2;margin-top:0}
.footer-inner{
  max-width:var(--max);margin:0 auto;padding:44px 20px 26px;
  display:grid;gap:30px;grid-template-columns:2fr 1fr 1fr;
}
.site-footer h4{color:#fff;margin:0 0 10px;font-size:1rem}
.site-footer a{color:#dfe4f2;text-decoration:none}
.site-footer a:hover{color:var(--orange)}
.footer-brand p{font-size:.93rem;color:#b9c1d8}
.footer-links ul{list-style:none;margin:0;padding:0}
.footer-links li{margin-bottom:8px}
.footer-disclosure{
  max-width:var(--max);margin:0 auto;padding:0 20px 28px;
  font-size:.85rem;color:#a8b1ca;border-top:1px solid rgba(255,255,255,.14);padding-top:18px;
}

/* ---------- responsive ---------- */
@media (max-width:760px){
  body{font-size:16px}
  .hero h1{font-size:1.85rem}
  .hero-inner{padding:40px 20px 44px}
  .menu-toggle{display:block}
  .main-nav{display:none;width:100%;order:3;flex-basis:100%;margin-left:0;padding-bottom:10px}
  .main-nav.open{display:block}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:2px}
  .main-nav a{display:block;padding:11px 12px}
  .sub-menu{position:static;display:block;box-shadow:none;border:none;background:rgba(255,255,255,.08);margin:4px 0 8px}
  .sub-menu a{color:#fff}
  .sub-menu a:hover{background:rgba(255,255,255,.12)}
  .sub-menu .price{color:#cfd6e8}
  .footer-inner{grid-template-columns:1fr}
  .step h2{font-size:1.25rem}
}