/* ============================================
   CLIMATECONTROL — HVAC Services
   Ice Blue #0EA5E9 + Cool Gray #64748B + Dark #0F172A
   Fonts: Manrope (headings) + DM Sans (body)
   ============================================ */
:root {
  --blue: #0EA5E9;
  --blue-dark: #0284C7;
  --gray-cool: #64748B;
  --dark: #0F172A;
  --white: #FFFFFF;
  --off-white: #F8FAFC;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-300: #CBD5E1;
  --gray-400: #94A3B8;
  --gray-500: #64748B;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1E293B;
  --gray-900: #0F172A;
  --font-heading: 'Manrope', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --space-xs: clamp(0.25rem, 0.5vw, 0.5rem);
  --space-sm: clamp(0.5rem, 1vw, 0.75rem);
  --space-md: clamp(1rem, 2vw, 1.5rem);
  --space-lg: clamp(1.5rem, 3vw, 2rem);
  --space-xl: clamp(2rem, 4vw, 3rem);
  --space-2xl: clamp(3rem, 6vw, 4.5rem);
  --space-3xl: clamp(4rem, 8vw, 6rem);
  --space-4xl: clamp(5rem, 10vw, 8rem);
  --max-w: 1200px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-body); font-size: 1rem; line-height: 1.7; color: var(--gray-500); background: var(--white); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading); color: var(--gray-900); line-height: 1.2; font-weight: 700; }
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 var(--space-lg); }
.section { padding: var(--space-4xl) 0; }
.section--dark { background: var(--dark); color: var(--gray-300); }
.section--dark h2, .section--dark h3, .section--dark h4 { color: var(--white); }
.section--dark .section-label { color: var(--blue); }
.section--blue { background: var(--blue); color: rgba(255,255,255,0.85); }
.section--blue h2, .section--blue h3 { color: var(--white); }
.section--blue .section-label { color: var(--white); }
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }
.section-label { font-family: var(--font-body); font-size: clamp(0.65rem, 1vw, 0.75rem); font-weight: 700; letter-spacing: 0.2em; text-transform: uppercase; color: var(--blue); margin-bottom: var(--space-sm); }
.section-title { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: var(--space-md); letter-spacing: -0.02em; }
.section-desc { font-size: clamp(1rem, 1.5vw, 1.125rem); color: var(--gray-500); max-width: 600px; line-height: 1.7; }

/* Header */
.header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(15, 23, 42, 0.95); backdrop-filter: blur(12px); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.nav-logo { font-family: var(--font-heading); font-size: 1.25rem; font-weight: 800; color: var(--white); letter-spacing: 0.02em; }
.nav-logo span { color: var(--blue); }
.nav-links { display: flex; align-items: center; gap: var(--space-lg); }
.nav-link { font-size: 0.875rem; font-weight: 600; color: var(--gray-400); transition: color var(--transition); position: relative; }
.nav-link::after { content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px; background: var(--blue); transition: width var(--transition); }
.nav-link:hover, .nav-link.active { color: var(--white); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-cta { background: var(--blue); color: var(--white) !important; padding: 0.5rem 1.25rem; border-radius: 6px; font-weight: 700; }
.nav-cta::after { display: none; }
.nav-cta:hover { background: var(--blue-dark); }
.nav-toggle { display: none; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 0.85rem 2rem; font-family: var(--font-body); font-size: 0.875rem; font-weight: 700; border: 2px solid transparent; cursor: pointer; transition: all var(--transition); border-radius: 8px; }
.btn--blue { background: var(--blue); color: var(--white); border-color: var(--blue); }
.btn--blue:hover { background: var(--blue-dark); border-color: var(--blue-dark); }
.btn--outline { background: transparent; color: var(--white); border-color: rgba(255,255,255,0.3); }
.btn--outline:hover { border-color: var(--white); background: rgba(255,255,255,0.05); }
.btn--dark { background: var(--dark); color: var(--white); border-color: var(--dark); }
.btn--dark:hover { background: var(--gray-800); }
.btn--white { background: var(--white); color: var(--dark); border-color: var(--white); }
.btn--white:hover { background: var(--gray-100); }

/* Hero */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; background: var(--dark); overflow: hidden; }
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; opacity: 0.25; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(15, 23, 42, 0.7) 100%); z-index: 1; }
.hero .container { position: relative; z-index: 2; }
.hero-content { max-width: 650px; }
.hero-label { display: inline-flex; align-items: center; gap: var(--space-sm); font-size: 0.8rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--blue); margin-bottom: var(--space-lg); }
.hero-title { font-size: clamp(2.5rem, 6vw, 4rem); color: var(--white); margin-bottom: var(--space-md); letter-spacing: -0.03em; line-height: 1.1; }
.hero-title span { color: var(--blue); }
.hero-desc { font-size: clamp(1rem, 1.5vw, 1.15rem); color: var(--gray-400); margin-bottom: var(--space-xl); max-width: 500px; line-height: 1.7; }
.hero-actions { display: flex; gap: var(--space-md); flex-wrap: wrap; }
.hero-badge { display: inline-flex; align-items: center; gap: 0.5rem; margin-top: var(--space-xl); padding: 0.75rem 1.25rem; background: rgba(14, 165, 233, 0.1); border: 1px solid rgba(14, 165, 233, 0.2); border-radius: 8px; font-size: 0.85rem; color: var(--blue); font-weight: 600; }

/* Page Hero */
.page-hero { padding: calc(72px + var(--space-3xl)) 0 var(--space-3xl); background: var(--dark); position: relative; }
.page-hero::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 60px; height: 3px; background: var(--blue); }
.page-hero-title { font-size: clamp(2.5rem, 5vw, 4rem); color: var(--white); margin-bottom: var(--space-md); }
.page-hero-desc { font-size: clamp(1rem, 1.5vw, 1.125rem); color: var(--gray-400); max-width: 600px; }

/* Features */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); }
.feature-card { background: var(--white); border: 1px solid var(--gray-200); border-radius: 12px; overflow: hidden; transition: transform var(--transition), box-shadow var(--transition); }
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,0,0,0.08); }
.feature-card-img { aspect-ratio: 16/10; overflow: hidden; }
.feature-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--transition-slow); }
.feature-card:hover .feature-card-img img { transform: scale(1.05); }
.feature-card-body { padding: var(--space-lg); }
.feature-card-icon { font-size: 1.75rem; margin-bottom: var(--space-sm); }
.feature-card-title { font-size: 1.125rem; margin-bottom: var(--space-sm); font-weight: 700; }
.feature-card-desc { font-size: 0.9rem; color: var(--gray-500); line-height: 1.7; }

/* About Split */
.about-split { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3xl); align-items: center; }
.about-img { position: relative; border-radius: 12px; overflow: hidden; }
.about-img::after { content: ''; position: absolute; bottom: -12px; right: -12px; width: 100%; height: 100%; border: 2px solid var(--blue); border-radius: 12px; z-index: -1; }
.about-text { padding: var(--space-lg) 0; }

/* Stats */
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-lg); padding: var(--space-2xl) 0; border-top: 1px solid var(--gray-200); border-bottom: 1px solid var(--gray-200); }
.stat { text-align: center; }
.stat-num { font-family: var(--font-heading); font-size: clamp(2rem, 3vw, 2.75rem); font-weight: 800; color: var(--blue); line-height: 1; }
.stat-label { font-size: 0.8rem; color: var(--gray-500); text-transform: uppercase; letter-spacing: 0.1em; margin-top: var(--space-xs); }

/* Services */
.service-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3xl); align-items: center; padding: var(--space-3xl) 0; }
.service-row + .service-row { border-top: 1px solid rgba(255,255,255,0.08); }
.service-row.reverse { direction: rtl; }
.service-row.reverse > * { direction: ltr; }
.service-img { border-radius: 12px; overflow: hidden; }
.service-img img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4/3; }

/* Team */
.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-lg); }
.team-card { background: var(--white); border: 1px solid var(--gray-200); border-radius: 12px; text-align: center; overflow: hidden; transition: transform var(--transition), box-shadow var(--transition); }
.team-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,0,0,0.08); }
.team-card-img { aspect-ratio: 1; overflow: hidden; }
.team-card-img img { width: 100%; height: 100%; object-fit: cover; }
.team-card-name { font-family: var(--font-heading); font-size: 1rem; font-weight: 700; color: var(--gray-900); margin-top: var(--space-md); }
.team-card-role { font-size: 0.8rem; color: var(--blue); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: var(--space-md); }

/* Testimonials */
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); }
.testimonial-card { background: var(--white); border: 1px solid var(--gray-200); border-radius: 12px; padding: var(--space-xl); position: relative; }
.testimonial-card::before { content: '\201C'; position: absolute; top: var(--space-md); right: var(--space-lg); font-family: var(--font-heading); font-size: 5rem; line-height: 1; color: var(--gray-200); }
.testimonial-stars { color: #F59E0B; font-size: 0.875rem; margin-bottom: var(--space-md); }
.testimonial-text { font-size: 0.95rem; line-height: 1.7; color: var(--gray-600); margin-bottom: var(--space-lg); position: relative; }
.testimonial-author { display: flex; align-items: center; gap: var(--space-md); }
.testimonial-avatar { width: 48px; height: 48px; border-radius: 50%; object-fit: cover; }
.testimonial-name { font-family: var(--font-heading); font-weight: 700; font-size: 0.9rem; color: var(--gray-900); }
.testimonial-role { font-size: 0.8rem; color: var(--gray-500); }

/* CTA */
.cta-banner { background: var(--blue); padding: var(--space-3xl) 0; text-align: center; }
.cta-title { font-size: clamp(1.75rem, 3.5vw, 2.75rem); color: var(--white); margin-bottom: var(--space-md); }
.cta-desc { font-size: clamp(1rem, 1.5vw, 1.125rem); color: rgba(255,255,255,0.8); margin-bottom: var(--space-xl); max-width: 500px; margin-left: auto; margin-right: auto; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: var(--space-3xl); align-items: start; }
.form { display: flex; flex-direction: column; gap: var(--space-md); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-md); }
.form-group { display: flex; flex-direction: column; }
.form-label { font-size: 0.8rem; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; color: var(--gray-700); margin-bottom: var(--space-xs); }
.form-input, .form-select, .form-textarea { font-family: var(--font-body); font-size: 0.95rem; padding: 0.75rem 1rem; border: 1px solid var(--gray-300); border-radius: 8px; background: var(--white); color: var(--gray-900); transition: border-color var(--transition); width: 100%; }
.form-input:focus, .form-select:focus, .form-textarea:focus { outline: none; border-color: var(--blue); }
.form-textarea { resize: vertical; min-height: 140px; }
.form-ok, .form-err { display: none; padding: var(--space-md); font-size: 0.9rem; font-weight: 600; border-radius: 8px; }
.form-ok.show { display: block; background: #ECFDF5; color: #065F46; border-left: 3px solid #10B981; }
.form-err.show { display: block; background: #FEF2F2; color: #991B1B; border-left: 3px solid #EF4444; }
.contact-info { background: var(--gray-900); color: var(--gray-300); padding: var(--space-xl); border-radius: 12px; }
.contact-info h3 { color: var(--white); font-size: 1.25rem; margin-bottom: var(--space-lg); }
.contact-info-item { display: flex; gap: var(--space-md); align-items: flex-start; padding: var(--space-md) 0; border-bottom: 1px solid rgba(255,255,255,0.08); }
.contact-info-item:last-child { border-bottom: none; }
.contact-info-icon { font-size: 1.5rem; flex-shrink: 0; }
.contact-info-label { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: var(--blue); margin-bottom: var(--space-xs); }
.contact-info-text { font-size: 0.9rem; line-height: 1.6; }

/* Footer */
.footer { background: var(--gray-900); padding: var(--space-3xl) 0 var(--space-lg); }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: var(--space-xl); padding-bottom: var(--space-2xl); border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-brand-logo { font-family: var(--font-heading); font-size: 1.25rem; font-weight: 800; color: var(--white); margin-bottom: var(--space-md); }
.footer-brand-logo span { color: var(--blue); }
.footer-brand-desc { font-size: 0.9rem; color: var(--gray-500); line-height: 1.7; max-width: 300px; }
.footer-heading { font-family: var(--font-body); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.15em; text-transform: uppercase; color: var(--gray-400); margin-bottom: var(--space-md); }
.footer-links { display: flex; flex-direction: column; gap: var(--space-sm); }
.footer-link { font-size: 0.9rem; color: var(--gray-500); transition: color var(--transition); }
.footer-link:hover { color: var(--white); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: var(--space-lg); font-size: 0.8rem; color: var(--gray-500); }

/* Back to top */
.back-to-top { position: fixed; bottom: 2rem; right: 2rem; width: 48px; height: 48px; background: var(--blue); color: var(--white); border: none; border-radius: 8px; font-size: 1.25rem; cursor: pointer; opacity: 0; visibility: hidden; transition: opacity var(--transition), visibility var(--transition); z-index: 900; }
.back-to-top.show { opacity: 1; visibility: visible; }

/* Reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1); }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 980px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .service-row { grid-template-columns: 1fr; gap: var(--space-xl); }
  .service-row.reverse { direction: ltr; }
}
@media (max-width: 720px) {
  .nav-links { position: fixed; top: 72px; left: 0; right: 0; background: var(--dark); flex-direction: column; padding: var(--space-xl); gap: var(--space-md); transform: translateY(-120%); transition: transform var(--transition); border-bottom: 2px solid var(--blue); }
  .nav-links.open { transform: translateY(0); }
  .nav-toggle { display: flex; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
  .nav-toggle span { display: block; width: 24px; height: 2px; background: var(--white); transition: transform var(--transition), opacity var(--transition); }
  .nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .features-grid, .testimonials-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .about-split { grid-template-columns: 1fr; gap: var(--space-xl); }
  .about-img::after { display: none; }
  .form-row { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .hero-actions { flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}