:root{--hvac-blue:#0b5ba6;--hvac-blue-dark:#073e73;--hvac-orange:#f26a1b;--hvac-ink:#16202b;--hvac-slate:#4a5a6a;--hvac-mist:#f4f7fa;--hvac-line:#dbe4ec;}
/* HVAC Maintenance Dallas: theme styles.
   Palette set in style.css :root tokens. Mobile-first, conversion-focused. */

* { box-sizing: border-box; }
body { color: var(--hvac-ink); margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; line-height: 1.6; }
img { max-width: 100%; height: auto; }
a { color: var(--hvac-blue); }

.hvac-container { width: 100%; max-width: 1140px; margin: 0 auto; padding: 0 1.25rem; }
.hvac-skip { position: absolute; left: -9999px; }
.hvac-skip:focus { left: 1rem; top: 1rem; background: #fff; padding: .5rem 1rem; z-index: 100; }

/* Header */
.hvac-header { border-bottom: 1px solid var(--hvac-line); background: #fff; position: sticky; top: 0; z-index: 40; }
.hvac-header__inner { display: flex; align-items: center; gap: 1rem; min-height: 68px; }
.hvac-logo { font-weight: 800; font-size: 1.2rem; color: var(--hvac-blue-dark); text-decoration: none; }
.hvac-header__nav { margin-left: auto; }
.hvac-nav { list-style: none; display: flex; gap: 1.25rem; margin: 0; padding: 0; }
.hvac-nav a { text-decoration: none; color: var(--hvac-ink); font-weight: 600; }
.hvac-nav a:hover { color: var(--hvac-blue); }
.hvac-header__cta { white-space: nowrap; }
@media (max-width: 860px) {
  .hvac-header__nav { display: none; }
  .hvac-header__cta { margin-left: auto; }
}

/* Footer */
.hvac-footer { background: var(--hvac-ink); color: #cdd8e2; margin-top: 3rem; }
.hvac-footer__grid { display: grid; gap: 2rem; grid-template-columns: 2fr 1fr 1fr 1fr; padding: 3rem 1.25rem; }
.hvac-footer__brand { color: #fff; font-weight: 800; font-size: 1.1rem; margin-bottom: .5rem; }
.hvac-footer__col h4 { color: #fff; margin: 0 0 .75rem; }
.hvac-footer__col ul { list-style: none; margin: 0; padding: 0; }
.hvac-footer__col li { margin-bottom: .4rem; }
.hvac-footer a { color: #cdd8e2; text-decoration: none; }
.hvac-footer a:hover { color: #fff; }
.hvac-footer__legal { border-top: 1px solid rgba(255,255,255,.12); font-size: .85rem; padding: 1rem 0; color: #9fb0be; }
@media (max-width: 860px) { .hvac-footer__grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .hvac-footer__grid { grid-template-columns: 1fr; } }

/* Page content width for plain prose sections */
.hvac-page .hvac-prose { max-width: 760px; margin-left: auto; margin-right: auto; }

/* Hero two-column layout */
.hvac-hero { padding: clamp(2.5rem, 6vw, 4.5rem) 0; }
.hvac-hero__inner { display: grid; grid-template-columns: 1.1fr .9fr; gap: 2.5rem; align-items: center; }
.hvac-hero__media img { border-radius: 14px; box-shadow: 0 20px 40px rgba(0,0,0,.25); display: block; }
.hvac-cta-row { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.5rem; }
.hvac-btn--ghost-light { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,.6); }
.hvac-btn--ghost-light:hover { background: rgba(255,255,255,.12); }
@media (max-width: 860px) { .hvac-hero__inner { grid-template-columns: 1fr; } .hvac-hero__media { order: -1; } }

/* Section headings */
.hvac-section > .hvac-container > h2,
.hvac-section h2.hvac-section__title { text-align: center; margin-bottom: .5rem; }
.hvac-section__sub { text-align: center; color: var(--hvac-slate); max-width: 680px; margin: 0 auto 2rem; }

/* Checklist */
.hvac-list { list-style: none; padding: 0; display: grid; gap: .6rem; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.hvac-list li { position: relative; padding-left: 1.9rem; }
.hvac-list li::before { content: "✓"; position: absolute; left: 0; top: 0; color: #fff; background: var(--hvac-blue); width: 1.3rem; height: 1.3rem; border-radius: 50%; display: grid; place-items: center; font-size: .8rem; font-weight: 700; }

/* Steps as cards */
.hvac-steps { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.hvac-step { background: #fff; border: 1px solid var(--hvac-line); border-radius: 12px; padding: 1.5rem 1.5rem 1.5rem 1.5rem; }
.hvac-step::before { position: static; display: inline-grid; margin-bottom: .75rem; }

/* FAQ accordion */
.hvac-faq details { background: #fff; border: 1px solid var(--hvac-line); border-radius: 10px; padding: 1rem 1.25rem; margin-bottom: .75rem; }
.hvac-faq summary { font-weight: 700; cursor: pointer; color: var(--hvac-blue-dark); }
.hvac-faq details[open] summary { margin-bottom: .6rem; }

/* Final CTA band */
.hvac-cta-band { background: linear-gradient(135deg, var(--hvac-blue-dark), var(--hvac-blue)); color: #fff; text-align: center; padding: clamp(2.5rem,6vw,4rem) 0; }
.hvac-cta-band h2 { color: #fff; }
.hvac-cta-band .hvac-cta-row { justify-content: center; }

/* Town/service-area link grid */
.hvac-towns { list-style: none; padding: 0; display: grid; gap: .6rem; grid-template-columns: repeat(auto-fit, minmax(160px,1fr)); }
.hvac-towns a { display: block; background: #fff; border: 1px solid var(--hvac-line); border-radius: 8px; padding: .75rem 1rem; text-decoration: none; font-weight: 600; text-align: center; }
.hvac-towns a:hover { border-color: var(--hvac-blue); }

/* Contact form */
.hvac-form { display: grid; gap: 1rem; max-width: 640px; }
.hvac-form label { display: block; font-weight: 600; margin-bottom: .3rem; }
.hvac-form input, .hvac-form select, .hvac-form textarea { width: 100%; padding: .7rem .8rem; border: 1px solid var(--hvac-line); border-radius: 8px; font: inherit; }
.hvac-form .hvac-note { color: var(--hvac-slate); font-size: .9rem; }

/* Buttons */
.hvac-btn { display: inline-block; font-weight: 700; line-height: 1; padding: 0.9rem 1.4rem;
  border-radius: 8px; text-decoration: none; transition: transform .05s ease, background .15s ease; }
.hvac-btn:active { transform: translateY(1px); }
.hvac-btn--primary { background: var(--hvac-orange); color: #fff; }
.hvac-btn--primary:hover { background: #d9560e; }
.hvac-btn--secondary { background: var(--hvac-blue); color: #fff; }
.hvac-btn--secondary:hover { background: var(--hvac-blue-dark); }
.hvac-btn--ghost { background: transparent; color: var(--hvac-blue); border: 2px solid var(--hvac-blue); }

/* Hero */
.hvac-hero { background: linear-gradient(135deg, var(--hvac-blue-dark), var(--hvac-blue)); color: #fff; }
.hvac-hero h1 { color: #fff; font-size: clamp(1.9rem, 4vw, 3rem); line-height: 1.1; }
.hvac-hero p { color: #e8f1fa; font-size: clamp(1.05rem, 2vw, 1.25rem); }
.hvac-hero .hvac-badges { display: flex; flex-wrap: wrap; gap: .5rem; margin: 1.25rem 0; }
.hvac-hero .hvac-badge { background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.25);
  padding: .35rem .7rem; border-radius: 999px; font-size: .85rem; }

/* Sections */
.hvac-section { padding: clamp(2.5rem, 6vw, 4.5rem) 0; }
.hvac-section--mist { background: var(--hvac-mist); }
.hvac-section h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }

/* Cards / grids */
.hvac-grid { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.hvac-card { background: #fff; border: 1px solid var(--hvac-line); border-radius: 12px; padding: 1.5rem; }
.hvac-card h3 { color: var(--hvac-blue-dark); margin-top: 0; }

/* Steps */
.hvac-steps { counter-reset: step; }
.hvac-step { position: relative; padding-left: 3.25rem; }
.hvac-step::before { counter-increment: step; content: counter(step); position: absolute; left: 0; top: 0;
  width: 2.25rem; height: 2.25rem; background: var(--hvac-orange); color: #fff; border-radius: 50%;
  display: grid; place-items: center; font-weight: 800; }

/* Trust strip */
.hvac-trust { color: var(--hvac-slate); font-size: .95rem; }

/* Sticky mobile call-to-action bar (form-based, no fake phone) */
.hvac-sticky-cta { position: fixed; left: 0; right: 0; bottom: 0; z-index: 50; display: none;
  background: #fff; border-top: 1px solid var(--hvac-line); padding: .6rem; }
@media (max-width: 782px) { .hvac-sticky-cta { display: flex; gap: .5rem; } .hvac-sticky-cta .hvac-btn { flex: 1; text-align: center; } }