/* Des Moines Local HVAC — self-contained stylesheet, system fonts, no frameworks */
:root{
  --ink:#12232f;
  --body:#2c3f4c;
  --muted:#546a78;
  --primary:#0d2c44;
  --primary-2:#164a70;
  --accent:#0e8aa8;
  --accent-dark:#0a6c85;
  --warm:#c25a1e;
  --bg:#f6f9fb;
  --card:#ffffff;
  --line:#dbe4ea;
  --radius:14px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--body);background:var(--bg);line-height:1.65;font-size:16px}
h1,h2,h3,h4{color:var(--ink);line-height:1.2;margin:0 0 .6em}
h2{font-size:1.55rem;margin-top:0}
h3{font-size:1.15rem}
p{margin:0 0 1rem}
a{color:var(--accent-dark)}
a:hover{text-decoration-thickness:2px}
a:focus-visible,button:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:4px}
ul,ol{padding-left:1.3rem}
li{margin:.3rem 0}
img{max-width:100%}
.container{max-width:1100px;margin:0 auto;padding:0 1rem}
.skip{position:absolute;left:-9999px;top:0;background:var(--primary);color:#fff;padding:.7rem 1.1rem;z-index:60}
.skip:focus{left:8px;top:8px}
/* Header */
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.nav-wrap{display:flex;align-items:center;gap:1rem;min-height:66px}
.brand{display:flex;align-items:center;gap:.6rem;text-decoration:none;margin-right:auto}
.brand-mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(160deg,var(--accent),var(--primary));position:relative;flex:none}
.brand-mark::after{content:"";position:absolute;inset:9px;border:2.5px solid #fff;border-radius:50%;border-top-color:transparent;border-right-color:transparent;transform:rotate(45deg)}
.brand-text{display:flex;flex-direction:column;line-height:1.05}
.brand-top{font-size:.66rem;letter-spacing:.22em;text-transform:uppercase;color:var(--accent-dark);font-weight:700}
.brand-name{font-size:1.12rem;font-weight:800;color:var(--primary)}
.main-nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 14px 28px rgba(13,44,68,.12)}
.main-nav.open{display:block}
.main-nav ul{list-style:none;margin:0;padding:.5rem 1rem 1rem;display:flex;flex-direction:column}
.main-nav a{display:block;padding:.7rem .3rem;color:var(--ink);text-decoration:none;font-weight:600;border-bottom:1px solid var(--line)}
.main-nav li:last-child a{border-bottom:0}
.main-nav a[aria-current="page"]{color:var(--accent-dark)}
.header-actions{display:flex;align-items:center;gap:.7rem}
.nav-toggle{width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:10px;cursor:pointer;display:grid;place-items:center;padding:0}
.bars,.bars::before,.bars::after{content:"";display:block;width:20px;height:2px;background:var(--primary);border-radius:2px;position:relative;transition:transform .2s,opacity .2s}
.bars::before{position:absolute;top:-6px}
.bars::after{position:absolute;top:6px}
.nav-toggle[aria-expanded="true"] .bars{background:transparent}
.nav-toggle[aria-expanded="true"] .bars::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .bars::after{transform:translateY(-6px) rotate(-45deg)}
/* Buttons */
.btn{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;font-weight:700;padding:.9rem 1.5rem;border-radius:999px;border:0}
.btn:hover{background:var(--accent-dark);color:#fff}
.btn-small{padding:.55rem 1.05rem;font-size:.92rem}
.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.85)}
.btn-outline:hover{background:rgba(255,255,255,.12);color:#fff}
.btn-light{background:#fff;color:var(--primary)}
.btn-light:hover{background:#e6f3f7;color:var(--primary)}
.btn-row{display:flex;gap:.8rem;flex-wrap:wrap;margin:1.2rem 0}
/* Hero */
.hero{background:linear-gradient(180deg,#0d2c44 0%,#123d5e 100%);color:#fff;padding:3.4rem 0 3rem}
.hero h1{color:#fff;font-size:clamp(1.9rem,4.5vw,2.9rem);max-width:20ch}
.hero p{max-width:62ch;color:#dbe9f2}
.eyebrow{display:inline-block;text-transform:uppercase;letter-spacing:.16em;font-weight:800;font-size:.74rem;color:#ffd9a0;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.22);padding:.35rem .8rem;border-radius:999px;margin-bottom:1rem}
.hero .btn-outline{margin-left:0}
/* Breadcrumbs */
.crumbs{font-size:.86rem;padding:.75rem 0 0;color:var(--muted)}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:.4rem;padding:0;margin:0}
.crumbs li{margin:0}
.crumbs li+li::before{content:"›";margin-right:.4rem;color:var(--muted)}
.crumbs [aria-current]{color:var(--ink);font-weight:600}
/* Sections */
.section{padding:3rem 0}
.section-tight{padding:2rem 0}
.section-alt{background:#eef4f8}
.lead{font-size:1.13rem;color:var(--ink);max-width:70ch}
.prose{max-width:78ch}
.prose h2{margin-top:2.2rem}
.prose h3{margin-top:1.6rem}
.section-head{max-width:70ch;margin-bottom:1.6rem}
.kicker{color:var(--accent-dark);text-transform:uppercase;letter-spacing:.12em;font-size:.78rem;font-weight:800;margin-bottom:.3rem}
/* Cards */
.grid{display:grid;gap:1.1rem}
@media(min-width:640px){.grid-2{grid-template-columns:1fr 1fr}}
@media(min-width:900px){.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:1.35rem;box-shadow:0 1px 2px rgba(13,44,68,.05)}
.card h3{margin-top:0}
.card-link{display:block;text-decoration:none;color:inherit;transition:transform .15s,box-shadow .15s}
.card-link:hover{transform:translateY(-2px);box-shadow:0 10px 22px rgba(13,44,68,.1)}
.card-link h3{color:var(--primary)}
.card-link .go{color:var(--accent-dark);font-weight:700}
/* Steps */
.steps{list-style:none;padding:0;margin:0;counter-reset:step}
.steps li{counter-increment:step;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.4rem;position:relative}
.steps li::before{content:counter(step);display:grid;place-items:center;width:44px;height:44px;border-radius:50%;background:var(--primary);color:#fff;font-weight:800;font-size:1.15rem;margin-bottom:.8rem}
.steps h3{margin-bottom:.3rem}
/* Disclosure */
.disclosure{background:#fff8ec;border:1px solid #eed9ae;border-left:5px solid var(--warm);border-radius:10px;padding:1rem 1.2rem}
.disclosure p{margin:0;color:#5c4a2a;font-size:.95rem}
/* CTA band */
.cta-band{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-2) 100%);color:#fff;text-align:center;padding:3.2rem 0}
.cta-band h2{color:#fff;font-size:1.8rem}
.cta-band p{color:#cfe2ee;max-width:60ch;margin-left:auto;margin-right:auto}
.cta-band .disclosure{max-width:760px;margin:1.6rem auto 0;text-align:left}
/* FAQ */
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:0;margin:.7rem 0}
.faq summary{cursor:pointer;padding:1rem 1.2rem;font-weight:700;color:var(--primary);list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;font-size:1.3rem;color:var(--accent-dark)}
.faq details[open] summary::after{content:"–"}
.faq details p{padding:0 1.2rem 1.1rem;margin:0}
/* Tables */
.table-wrap{overflow-x:auto;margin:1.2rem 0}
table{border-collapse:collapse;width:100%;background:#fff;font-size:.95rem}
caption{text-align:left;font-weight:700;color:var(--ink);padding-bottom:.5rem}
th,td{border:1px solid var(--line);padding:.65rem .8rem;text-align:left;vertical-align:top}
th{background:#eef4f8;color:var(--primary)}
/* Chips (zips) */
.chips{list-style:none;display:flex;flex-wrap:wrap;gap:.5rem;padding:0;margin:1rem 0}
.chips li{margin:0;background:#fff;border:1px solid var(--line);border-radius:999px;padding:.35rem .9rem;font-weight:700;color:var(--primary);font-size:.92rem}
/* Contact card */
.contact-card{display:grid;gap:1.1rem}
@media(min-width:760px){.contact-card{grid-template-columns:1.1fr 1fr}}
.contact-block{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.5rem}
.contact-block address{font-style:normal;font-size:1.05rem;line-height:1.7}
.phone-big{font-size:1.5rem;font-weight:800}
.phone-big a{color:var(--accent-dark);text-decoration:none}
/* Article */
.article-hero{background:linear-gradient(180deg,#0d2c44 0%,#123d5e 100%);color:#fff;padding:2.6rem 0 2.4rem}
.article-hero h1{color:#fff;font-size:clamp(1.7rem,3.8vw,2.4rem);max-width:26ch}
.article-hero p{color:#dbe9f2;max-width:64ch}
.article-meta{font-size:.85rem;color:#9fc0d2;margin-top:.8rem}
.article-body h2{margin-top:2.2rem}
.article-body h3{margin-top:1.5rem}
/* Footer */
.site-footer{background:var(--primary);color:#cfe0ea;margin-top:3rem}
.site-footer .container{padding-top:2.6rem;padding-bottom:2rem}
.site-footer a{color:#a9d4e6;text-decoration:none}
.site-footer a:hover{color:#fff;text-decoration:underline}
.footer-grid{display:grid;gap:1.6rem}
@media(min-width:760px){.footer-grid{grid-template-columns:1.3fr 1fr 1fr .8fr}}
.footer-brand{font-weight:800;color:#fff;font-size:1.1rem;margin-bottom:.5rem}
.site-footer address{font-style:normal;line-height:1.7}
.footer-heading{font-size:.8rem;text-transform:uppercase;letter-spacing:.12em;color:#8fb6c9;margin-bottom:.6rem}
.footer-links{list-style:none;padding:0;margin:0}
.footer-links a{display:inline-block;padding:.2rem 0}
.footer-disclosure{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.25);border-left-color:var(--warm);margin-top:2rem}
.footer-disclosure p{color:#dbe9f2}
.footer-bottom{margin:1.2rem 0 0;font-size:.85rem;color:#8fb6c9}
/* Sticky mobile call */
.sticky-call{display:none;position:fixed;left:0;right:0;bottom:0;z-index:55;background:var(--accent);color:#fff;text-align:center;font-weight:800;letter-spacing:.04em;padding:1rem;font-size:1.05rem;text-decoration:none;box-shadow:0 -4px 16px rgba(0,0,0,.18)}
@media(max-width:899px){
  .sticky-call{display:block}
  body{padding-bottom:60px}
}
@media(min-width:900px){
  .main-nav{display:block;position:static;box-shadow:none;border:0}
  .main-nav ul{flex-direction:row;gap:.2rem;padding:0;align-items:center}
  .main-nav a{padding:.55rem .6rem;font-size:.92rem;border:0;border-radius:8px}
  .main-nav a:hover{background:#eef4f8}
  .nav-toggle{display:none}
}
@media(min-width:1100px){.main-nav a{padding:.55rem .8rem;font-size:.95rem}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}