/* The Power Cord & Cordset Reference — custom technical theme (navy + copper) */
:root{
  --navy:#0b3d63; --navy-700:#0a3355; --navy-900:#072133; --navy-050:#eef3f8;
  --copper:#c0742f; --copper-600:#a75f1f; --copper-050:#fbf1e6;
  --ink:#1f2933; --muted:#5b6b78; --line:#dbe3ea;
  --bg:#ffffff; --bg-alt:#f4f6f8;
  --radius:12px; --radius-sm:8px;
  --shadow:0 1px 2px rgba(9,30,46,.06),0 8px 24px rgba(9,30,46,.08);
  --shadow-sm:0 1px 2px rgba(9,30,46,.06),0 2px 8px rgba(9,30,46,.06);
  --maxw:1120px;
  --sans:'IBM Plex Sans',system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);color:var(--ink);background:var(--bg);line-height:1.65;font-size:17px;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--navy);text-decoration:none}
a:hover{color:var(--copper-600)}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* Safeguard: never gate content visibility on JS (AOS/scroll-reveal template bug) */
[data-aos]{opacity:1 !important;transform:none !important}

/* ---------- Header / nav ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:saturate(1.4) blur(8px);border-bottom:1px solid var(--line)}
.site-nav{display:flex;align-items:center;gap:12px;max-width:var(--maxw);margin:0 auto;padding:12px 24px;flex-wrap:wrap}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;color:var(--navy);letter-spacing:-.01em}
.brand-mark{display:inline-flex;color:var(--copper)}
.brand-text{font-size:1.06rem;line-height:1.05}
.brand-sub{color:var(--muted);font-weight:500;font-size:.82rem;display:block}
.nav-toggle{margin-left:auto;display:none;flex-direction:column;gap:5px;background:none;border:1px solid var(--line);border-radius:8px;padding:9px 10px;cursor:pointer}
.nav-toggle span{width:20px;height:2px;background:var(--navy);border-radius:2px;transition:.2s}
.nav-list{list-style:none;display:flex;align-items:center;gap:6px;margin:0 0 0 auto;padding:0}
.nav-list>li{position:relative}
.nav-list>li>a,.dd-btn{display:inline-flex;align-items:center;gap:6px;font:inherit;font-size:.94rem;font-weight:500;color:var(--ink);background:none;border:0;cursor:pointer;padding:9px 12px;border-radius:8px;white-space:nowrap}
.nav-list>li>a:hover,.dd-btn:hover{background:var(--navy-050);color:var(--navy)}
.nav-list>li>a.active{color:var(--copper-600);font-weight:600}
.chev{transition:transform .2s}
.dropdown{list-style:none;margin:0;padding:6px;position:absolute;top:calc(100% + 6px);left:0;min-width:224px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translateY(6px);transition:.16s}
.has-dropdown:hover .dropdown,.has-dropdown:focus-within .dropdown,.has-dropdown.open .dropdown{opacity:1;visibility:visible;transform:none}
.has-dropdown:hover .chev,.has-dropdown.open .chev{transform:rotate(180deg)}
.dropdown li a{display:block;padding:9px 12px;border-radius:6px;font-size:.92rem;color:var(--ink)}
.dropdown li a:hover{background:var(--copper-050);color:var(--copper-600)}
.dropdown li a.active{color:var(--copper-600);font-weight:600}

/* ---------- Hero (home) ---------- */
.hero{background:radial-gradient(1200px 500px at 80% -10%,rgba(192,116,47,.18),transparent 60%),linear-gradient(160deg,var(--navy) 0%,var(--navy-900) 100%);color:#eaf1f7}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;padding:64px 24px}
.eyebrow{display:inline-block;font-family:var(--mono);font-size:.74rem;letter-spacing:.14em;text-transform:uppercase;color:#e7b483;border:1px solid rgba(231,180,131,.4);padding:5px 10px;border-radius:999px;margin-bottom:18px}
.hero-copy h1{font-size:clamp(2rem,4.4vw,3rem);line-height:1.1;margin:0 0 16px;letter-spacing:-.02em;color:#fff}
.hero-copy .lead{font-size:1.12rem;color:#c4d5e2;margin:0 0 26px;max-width:34em}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:.96rem;padding:12px 22px;border-radius:10px;transition:.18s;border:1px solid transparent;cursor:pointer}
.btn-primary{background:var(--copper);color:#fff}
.btn-primary:hover{background:var(--copper-600);color:#fff;transform:translateY(-1px)}
.btn-ghost{background:rgba(255,255,255,.06);color:#eaf1f7;border-color:rgba(255,255,255,.28)}
.btn-ghost:hover{background:rgba(255,255,255,.14);color:#fff}
.hero-media img{border-radius:var(--radius);box-shadow:0 20px 50px rgba(0,0,0,.35);border:1px solid rgba(255,255,255,.1)}

/* ---------- Topic cards ---------- */
.topics{padding:56px 0 8px;background:var(--bg)}
.section-title{font-size:1.5rem;letter-spacing:-.01em;margin:0 0 22px;position:relative;padding-left:16px}
.section-title::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:5px;border-radius:3px;background:var(--copper)}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.topic-card{position:relative;display:flex;flex-direction:column;gap:8px;padding:22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);transition:.18s;overflow:hidden}
.topic-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--navy);opacity:.6;transition:.18s}
.topic-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#c4d2dd}
.topic-card:hover::before{background:var(--copper);opacity:1}
.topic-code{font-family:var(--mono);font-weight:600;font-size:1.02rem;color:var(--navy)}
.topic-desc{color:var(--muted);font-size:.95rem}
.topic-arrow{color:var(--copper);font-weight:700;margin-top:2px}

/* ---------- Inner page band ---------- */
.page-band{background:linear-gradient(160deg,var(--navy) 0%,var(--navy-700) 100%);color:#fff;padding:40px 0 44px;margin-bottom:0}
.page-band h1{margin:.35em 0 0;font-size:clamp(1.7rem,3.4vw,2.4rem);letter-spacing:-.02em;color:#fff;max-width:20ch}
.crumbs{font-size:.82rem;color:#a9c1d4;font-family:var(--mono);letter-spacing:.02em}
.crumbs a{color:#cfe0ec}
.crumbs a:hover{color:#fff}
.crumbs span{color:#87a3b8}

/* ---------- Article ---------- */
.article-wrap{padding:44px 0 24px}
.article{max-width:760px;margin:0 auto}
.article h1{font-size:clamp(1.8rem,3.4vw,2.3rem);line-height:1.12;letter-spacing:-.02em;margin:0 0 .5em}
.article h2{font-size:1.4rem;letter-spacing:-.01em;margin:1.9em 0 .5em;padding-top:.3em}
.article h3{font-size:1.12rem;margin:1.5em 0 .4em}
.article p{margin:0 0 1.1em}
.article ul,.article ol{margin:0 0 1.2em;padding-left:1.3em}
.article li{margin:.4em 0}
.article strong{color:var(--navy-900)}
.article a{color:var(--copper-600);text-decoration:underline;text-underline-offset:2px;text-decoration-color:rgba(192,116,47,.35)}
.article a:hover{text-decoration-color:var(--copper)}
.article a[rel~="nofollow"]{color:var(--navy);text-decoration-color:rgba(11,61,99,.3)}
.lead-figure{margin:0 0 1.8em}
.lead-figure img{border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--line)}
.page-band + .article-wrap .article > .lead-figure{margin-top:-4px}

/* emphasis: clean italic (designators like 5-15P read naturally in italic) */
.article em{font-style:italic;color:var(--navy-900);font-weight:500}

/* contact form */
.contact-form{display:grid;gap:14px;margin:1.5em 0 1em;padding:24px;background:var(--bg-alt);border:1px solid var(--line);border-radius:var(--radius)}
.contact-form label{display:grid;gap:6px;font-weight:600;font-size:.9rem;color:var(--navy-900)}
.contact-form input,.contact-form textarea{font:inherit;padding:11px 13px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink)}
.contact-form input:focus,.contact-form textarea:focus{outline:2px solid var(--copper);outline-offset:1px;border-color:var(--copper)}
.contact-form button{justify-self:start;background:var(--navy);color:#fff;border:0;padding:12px 26px;border-radius:9px;font-weight:600;cursor:pointer;transition:.18s}
.contact-form button:hover{background:var(--copper-600)}
.form-note{font-size:.86rem;color:var(--muted)}

/* ---------- Footer ---------- */
.site-footer{margin-top:56px;background:var(--navy-900);color:#c4d5e2}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;padding:52px 24px 36px}
.footer-brand{color:#fff;margin-bottom:12px}
.footer-brand .brand-mark{color:var(--copper)}
.footer-about p{color:#9fb6c7;font-size:.92rem;max-width:34ch}
.footer-col h3{color:#fff;font-size:.82rem;letter-spacing:.1em;text-transform:uppercase;margin:0 0 14px}
.footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.footer-col a{color:#b7cadb;font-size:.92rem}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1)}
.footer-bottom .container{padding-top:18px;padding-bottom:26px}
.footer-bottom p{margin:0;font-size:.82rem;color:#89a2b5;line-height:1.6}

/* ---------- Responsive ---------- */
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:32px;padding:48px 24px}
  .hero-media{order:-1}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
}
@media (max-width:720px){
  body{font-size:16px}
  .nav-toggle{display:flex}
  .nav-list{display:none;flex-direction:column;align-items:stretch;width:100%;margin:10px 0 4px;gap:2px}
  .site-nav.open .nav-list{display:flex}
  .nav-list>li{width:100%}
  .nav-list>li>a,.dd-btn{width:100%;padding:12px 10px}
  .dd-btn{justify-content:space-between}
  .dropdown{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;border-left:2px solid var(--line);border-radius:0;margin:0 0 4px 12px;padding:2px 0 2px 6px;display:none}
  .has-dropdown.open .dropdown{display:block}
  .card-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
}
@media (max-width:420px){
  .brand-sub{display:none}
}