/* =============================================================
   Air Sorce-1 HVAC — css/style.css
   Non-critical styles. Loaded async via media="print" swap.
   Above-the-fold CSS is inlined in each HTML <head>.
   ============================================================= */

/* TYPOGRAPHY */
h2 { font-size: clamp(1.7rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.05rem, 2vw, 1.35rem); }
h4 { font-size: 1rem; }
p  { font-size: 1rem; color: var(--gray-700); max-width: 68ch; }

/* LAYOUT UTILITIES */
.section     { padding: clamp(3.5rem, 7vw, 5.5rem) 0; }
.section-alt { background: var(--off-white); }
.text-center { text-align: center; }
.text-center p { margin-left: auto; margin-right: auto; }

.section-label {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: .78rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--red);
  background: rgba(192, 57, 43, .08);
  padding: .3rem .9rem;
  border-radius: 100px;
  margin-bottom: .75rem;
}
.section-title { margin-bottom: 1rem; }
.section-sub {
  font-size: 1.05rem;
  color: var(--gray-500);
  max-width: 54ch;
  margin: 0 auto 2.5rem;
}

/* PAGE HERO (inner pages) */
.page-hero {
  background: var(--blue);
  padding: 4rem 0 3rem;
  position: relative;
}
.page-hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 4px;
  background: var(--red);
}
.page-hero h1 {
  color: var(--white);
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  contain: layout;
}
.page-hero .sub {
  color: rgba(255,255,255,.78);
  font-size: 1.05rem;
  max-width: 52ch;
  margin-top: .75rem;
}

/* TRUST BAR */
.trust-bar {
  padding: clamp(2.5rem, 5vw, 4rem) 0;
  background: var(--white);
}
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
.trust-card {
  text-align: center;
  padding: 1.75rem 1rem;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.trust-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.trust-card-icon { font-size: 2rem; margin-bottom: .75rem; }
.trust-card h3   { font-size: 1rem; margin-bottom: .3rem; }
.trust-card p    { font-size: .88rem; color: var(--gray-500); max-width: none; }

/* SERVICES GRID */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  text-align: left;
}
.service-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--red), var(--red-light));
}
.service-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.service-icon      { font-size: 2rem; margin-bottom: 1rem; }
.service-card h3   { font-size: 1.1rem; margin-bottom: .6rem; }
.service-card p    { font-size: .9rem; color: var(--gray-500); margin-bottom: 1.25rem; }
.service-link {
  font-family: var(--font-heading);
  font-size: .82rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--red);
  font-weight: 700;
  transition: color var(--transition);
}
.service-link:hover { color: var(--red-dark); }

/* WHY CHOOSE US */
.why-grid {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 4rem;
  align-items: center;
}
.why-intro  { font-size: 1.05rem; color: var(--gray-500); margin-bottom: 2rem; max-width: none; }
.why-list   { display: flex; flex-direction: column; gap: 1.25rem; margin-bottom: 2rem; }
.why-item   { display: flex; gap: 1rem; align-items: flex-start; }
.why-check  {
  width: 28px; height: 28px;
  background: var(--red);
  color: white;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: .9rem; font-weight: 700;
  flex-shrink: 0; margin-top: .15rem;
}
.why-item h3 { font-size: 1rem; margin-bottom: .3rem; font-weight: 600; }
.why-item p  { font-size: .9rem; color: var(--gray-500); max-width: none; }
.why-visual {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-mid) 100%);
  border-radius: var(--radius-lg);
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.why-badge {
  background: var(--red);
  color: white;
  border-radius: var(--radius-lg);
  padding: 1.5rem 2rem;
  text-align: center;
  box-shadow: var(--shadow-lg);
}
.why-badge .num   { display: block; font-family: var(--font-heading); font-size: 3.5rem; font-weight: 700; line-height: 1; }
.why-badge .label { display: block; font-family: var(--font-heading); font-size: .85rem; letter-spacing: .1em; text-transform: uppercase; opacity: .9; margin-top: .4rem; }

/* TESTIMONIALS */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  text-align: left;
}
.testimonial-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}
.stars             { color: #F59E0B; font-size: 1.1rem; margin-bottom: .75rem; }
.testimonial-text  { font-size: .93rem; color: var(--gray-700); line-height: 1.7; margin-bottom: 1.25rem; flex: 1; }
.testimonial-author { display: flex; align-items: center; gap: .75rem; }
.author-avatar {
  width: 42px; height: 42px;
  background: linear-gradient(135deg, var(--blue), var(--blue-mid));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: white;
  font-family: var(--font-heading);
  font-size: .85rem; font-weight: 700;
  flex-shrink: 0;
}
.author-name     { font-weight: 700; font-size: .9rem; color: var(--gray-900); }
.author-location { font-size: .8rem; color: var(--gray-500); }

/* MAP */
.map-container {
  aspect-ratio: 16 / 7;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  margin-top: 1rem;
}
.map-container iframe { width: 100%; height: 100%; border: 0; display: block; }

/* HOW IT WORKS */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}
.step {
  text-align: center;
  padding: 2rem 1.25rem;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.step-num {
  width: 52px; height: 52px;
  background: var(--red);
  color: white;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-heading);
  font-size: 1.4rem; font-weight: 700;
  margin: 0 auto 1rem;
}
.step h3 { font-size: 1rem; margin-bottom: .5rem; }
.step p  { font-size: .88rem; color: var(--gray-500); max-width: none; }

/* FAQ */
.faq-list {
  max-width: 760px;
  margin: 2rem auto 0;
  display: flex;
  flex-direction: column;
  gap: .75rem;
}
.faq-item {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  overflow: hidden;
}
.faq-q {
  width: 100%;
  padding: 1.1rem 1.25rem;
  background: transparent;
  border: none;
  text-align: left;
  font-family: var(--font-heading);
  font-size: .95rem; font-weight: 700;
  color: var(--gray-900);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  transition: background var(--transition);
  min-height: 44px;
}
.faq-q:hover          { background: var(--gray-100); }
.faq-q:focus-visible  { outline: 2px solid var(--blue); outline-offset: -2px; }
.faq-q::after         { content: '+'; font-size: 1.4rem; color: var(--red); flex-shrink: 0; transition: transform var(--transition); }
.faq-item.open .faq-q::after { transform: rotate(45deg); }
.faq-a {
  display: none;
  padding: .75rem 1.25rem 1.25rem;
  font-size: .93rem;
  color: var(--gray-700);
  line-height: 1.7;
  border-top: 1px solid var(--gray-100);
}
.faq-item.open .faq-a { display: block; }

/* CTA BANNER */
.cta-banner {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-mid) 100%);
  padding: clamp(3rem, 6vw, 5rem) 0;
}
.cta-inner        { text-align: center; }
.cta-inner h2     { color: var(--white); margin-bottom: 1rem; }
.cta-inner p      { color: rgba(255,255,255,.82); max-width: 52ch; margin: 0 auto 2.5rem; font-size: 1.05rem; }
.cta-actions      { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* FOOTER */
footer {
  background: var(--gray-900);
  padding: clamp(3rem, 6vw, 5rem) 0 2rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}
.footer-brand .logo-wrap { margin-bottom: 1rem; }
.footer-brand p { font-size: .88rem; color: rgba(255,255,255,.8); max-width: 30ch; margin-bottom: 1.25rem; }
.footer-brand address { display: flex; flex-direction: column; gap: .5rem; }
.footer-brand address a { font-size: .88rem; color: rgba(255,255,255,.85); transition: color var(--transition); }
.footer-brand address a:hover { color: var(--white); }
.footer-col h3 {
  font-family: var(--font-heading);
  font-size: .82rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 1rem;
}
.footer-col ul  { display: flex; flex-direction: column; gap: .5rem; }
.footer-col li  { font-size: .88rem; color: rgba(255,255,255,.8); }
.footer-col a   { font-size: .88rem; color: rgba(255,255,255,.85); transition: color var(--transition); }
.footer-col a:hover { color: var(--white); }
.footer-col .emergency { color: var(--red-light); font-weight: 700; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-bottom p   { font-size: .82rem; color: rgba(255,255,255,.75); }
.footer-bottom a   { color: rgba(255,255,255,.85); transition: color var(--transition); }
.footer-bottom a:hover { color: var(--white); }

/* ABOUT PAGE */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 4rem;
  align-items: start;
}
.about-text h2 { margin-bottom: 1rem; }
.about-text p  { margin-bottom: 1.25rem; }
.about-stats   { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.stat-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.stat-num   { display: block; font-family: var(--font-heading); font-size: 2.5rem; font-weight: 700; color: var(--red); line-height: 1; }
.stat-label { display: block; font-size: .85rem; color: var(--gray-500); margin-top: .3rem; font-family: var(--font-heading); text-transform: uppercase; letter-spacing: .08em; }
.values-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; text-align: left; }
.value-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}
.value-icon { font-size: 2rem; margin-bottom: 1rem; }

/* SERVICES PAGE */
.service-detail-grid {
  display: grid;
  grid-template-columns: 1fr 200px;
  gap: 3rem;
  align-items: center;
}
.service-detail-grid.reverse { grid-template-columns: 200px 1fr; }
.service-detail-icon { font-size: 8rem; text-align: center; opacity: .8; }
.service-detail-list { list-style: none; margin: 1.5rem 0 2rem; display: flex; flex-direction: column; gap: .65rem; }
.service-detail-list li { display: flex; align-items: center; gap: .6rem; font-size: .95rem; color: var(--gray-700); }
.service-detail-list li::before { content: '✓'; color: var(--red); font-weight: 700; flex-shrink: 0; }
.maintenance-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-top: 2rem; }
.maintenance-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  position: relative;
}
.maintenance-card h3 { margin-bottom: .75rem; }
.maintenance-card p  { font-size: .9rem; color: var(--gray-500); margin-bottom: 1.5rem; }
.maintenance-card.featured { border-color: var(--red); box-shadow: 0 0 0 2px var(--red), var(--shadow-md); }
.featured-badge {
  background: var(--red);
  color: white;
  font-family: var(--font-heading);
  font-size: .72rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: .25rem .75rem;
  border-radius: 100px;
  margin-bottom: .75rem;
  display: inline-block;
}

/* CONTACT PAGE */
.contact-grid { display: grid; grid-template-columns: 1fr 400px; gap: 3rem; align-items: start; }
.contact-form-wrap h2 { margin-bottom: .5rem; }
.contact-form-wrap > p { margin-bottom: 2rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { display: flex; flex-direction: column; gap: .4rem; margin-bottom: 1.25rem; }
.form-group label {
  font-family: var(--font-heading);
  font-size: .82rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--gray-700);
  font-weight: 700;
}
.form-group input,
.form-group textarea {
  padding: .75rem 1rem;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--gray-900);
  background: var(--white);
  transition: border-color var(--transition);
  min-height: 44px;
}
.form-group input:focus,
.form-group textarea:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(26,58,92,.1); }
.form-group textarea { resize: vertical; min-height: 120px; }
.contact-info h2 { margin-bottom: 1.5rem; }
.contact-info address { display: flex; flex-direction: column; gap: 1.5rem; }
.contact-info-item { display: flex; gap: 1rem; align-items: flex-start; }
.contact-info-icon { font-size: 1.3rem; flex-shrink: 0; margin-top: .1rem; }
.contact-info-item strong { display: block; font-family: var(--font-heading); font-size: .82rem; letter-spacing: .08em; text-transform: uppercase; color: var(--gray-500); margin-bottom: .3rem; }
.contact-info-item a,
.contact-info-item span { display: block; font-size: .95rem; color: var(--gray-700); transition: color var(--transition); }
.contact-info-item a:hover { color: var(--blue); }
.emergency-text { color: var(--red) !important; font-weight: 700 !important; }

/* SCROLL ANIMATIONS */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .4s ease, transform .4s ease;
  will-change: transform, opacity;
}
/* Safety: if JS fails or misses element, show content after 1.5s */
@keyframes fadeInSafe{to{opacity:1;transform:none;}}
.fade-in{animation:fadeInSafe 0s 1.5s forwards;}
.js-loaded .fade-in{animation:none;}
.fade-in.visible {
  opacity: 1;
  transform: none;
  will-change: auto;
}

/* TABLET */
@media (max-width: 1024px) {
  .trust-grid         { grid-template-columns: repeat(2, 1fr); }
  .services-grid      { grid-template-columns: repeat(2, 1fr); }
  .why-grid           { grid-template-columns: 1fr; }
  .why-visual         { min-height: 200px; }
  .steps-grid         { grid-template-columns: repeat(2, 1fr); }
  .footer-grid        { grid-template-columns: 1fr 1fr; }
  .about-grid         { grid-template-columns: 1fr; }
  .contact-grid       { grid-template-columns: 1fr; }
  .values-grid        { grid-template-columns: 1fr 1fr; }
  .maintenance-grid   { grid-template-columns: 1fr 1fr; }
  .service-detail-grid,
  .service-detail-grid.reverse { grid-template-columns: 1fr; }
  .service-detail-icon { display: none; }
}

/* MOBILE */
@media (max-width: 768px) {
  .trust-grid         { grid-template-columns: 1fr 1fr; }
  .services-grid      { grid-template-columns: 1fr; }
  .testimonials-grid  { grid-template-columns: 1fr; }
  .steps-grid         { grid-template-columns: 1fr 1fr; }
  .footer-grid        { grid-template-columns: 1fr; }
  .footer-bottom      { flex-direction: column; text-align: center; }
  .map-container      { aspect-ratio: 4 / 3; }
  .why-grid           { gap: 2rem; }
  .form-row           { grid-template-columns: 1fr; }
  .values-grid        { grid-template-columns: 1fr; }
  .maintenance-grid   { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .cta-actions        { flex-direction: column; align-items: center; }
  .trust-grid         { grid-template-columns: 1fr; }
  .steps-grid         { grid-template-columns: 1fr; }
  .about-stats        { grid-template-columns: 1fr 1fr; }
}

/* MAP PLACEHOLDER — loads iframe only on click */
.map-placeholder {
  width: 100%; height: 100%;
  background: var(--gray-100);
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-lg);
}
.map-placeholder-inner { text-align: center; }
.map-icon { font-size: 3rem; display: block; margin-bottom: .75rem; }
.map-placeholder-inner p { font-family: var(--font-heading); font-size: 1.1rem; color: var(--gray-500); margin-bottom: 1.25rem; }

/* PHOTO GRID */
.photos-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}
.photo-slot {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--gray-100);
  aspect-ratio: 4 / 3;
}
.photo-slot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}
@media (max-width: 768px) {
  .photos-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .photos-grid { grid-template-columns: 1fr; }
}

/* Screen-reader only — visually hidden but accessible */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}
