/* =====================================================
   EFFICIENT AC & HEATING - Website Styles
   Theme: Friendly Green - Approachable & Reliable
   ===================================================== */

/* ----- CSS Variables ----- */
:root {
  /* Colors - Friendly Green Theme */
  --color-primary: #134e4a;
  --color-primary-dark: #0f3d3a;
  --color-accent: #14b8a6;
  --color-accent-hover: #0d9488;
  --color-secondary: #2dd4bf;
  --color-background: #f0fdfa;
  --color-dark: #042f2e;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-white: #ffffff;
  --color-border: #ccfbf1;
  --color-success: #22c55e;

  /* Typography */
  --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;

  /* Layout */
  --container-max: 1200px;
  --header-height: 80px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;
}

/* ----- Reset & Base ----- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-body); font-size: 16px; line-height: 1.6; color: var(--color-text); background-color: var(--color-background); }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition-fast); }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ----- Typography ----- */
h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading); font-weight: 700; line-height: 1.2; color: var(--color-primary); }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.5rem); }
p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }
.lead { font-size: 1.125rem; color: var(--color-text-secondary); line-height: 1.7; }

/* ----- Layout ----- */
.container { width: 100%; max-width: var(--container-max); margin: 0 auto; padding: 0 var(--spacing-md); }
section { padding: var(--spacing-3xl) 0; }
.section-header { text-align: center; max-width: 700px; margin: 0 auto var(--spacing-2xl); }
.section-header h2 { margin-bottom: var(--spacing-sm); }
.section-header p { color: var(--color-text-secondary); font-size: 1.125rem; }

/* ----- Header ----- */
.header { position: fixed; top: 0; left: 0; right: 0; height: var(--header-height); background: var(--color-white); box-shadow: var(--shadow-sm); z-index: 1000; transition: all var(--transition-base); }
.header.scrolled { height: 64px; box-shadow: var(--shadow-md); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 100%; max-width: var(--container-max); margin: 0 auto; padding: 0 var(--spacing-md); }

/* Logo */
.logo { display: flex; flex-direction: column; text-decoration: none; }
.logo-text { font-family: var(--font-heading); font-size: 1.5rem; font-weight: 800; color: var(--color-primary); letter-spacing: 1px; line-height: 1; }
.logo-sub { font-size: 0.75rem; color: var(--color-accent); font-weight: 600; letter-spacing: 0.5px; }

/* Navigation */
.nav { display: flex; align-items: center; }
.nav-list { display: flex; gap: var(--spacing-lg); }
.nav-link { position: relative; font-weight: 500; color: var(--color-text); padding: var(--spacing-xs) 0; }
.nav-link::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: var(--color-accent); transition: width var(--transition-base); }
.nav-link:hover, .nav-link.active { color: var(--color-accent); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

/* Header CTA */
.header-cta { display: flex; align-items: center; gap: var(--spacing-xs); background: var(--color-accent); color: var(--color-white); padding: var(--spacing-sm) var(--spacing-md); border-radius: var(--radius-md); font-weight: 600; font-size: 0.875rem; transition: all var(--transition-fast); }
.header-cta:hover { background: var(--color-accent-hover); transform: translateY(-2px); }
.header-cta svg { width: 18px; height: 18px; fill: currentColor; }

/* Mobile Menu Toggle */
.menu-toggle { display: none; flex-direction: column; justify-content: center; align-items: center; width: 40px; height: 40px; padding: 8px; gap: 5px; }
.menu-toggle span { display: block; width: 24px; height: 2px; background: var(--color-primary); border-radius: 2px; transition: all var(--transition-fast); }
.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ----- Hero Section ----- */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center; padding-top: var(--header-height); overflow: hidden; }
.hero-background { position: absolute; inset: 0; z-index: -1; }
.hero-gradient { width: 100%; height: 100%; background: linear-gradient(135deg, var(--color-primary) 0%, #115e59 50%, var(--color-primary-dark) 100%); }
.hero-content { text-align: center; color: var(--color-white); padding: var(--spacing-2xl); max-width: 900px; }

.hero-badge { display: inline-flex; align-items: center; gap: var(--spacing-sm); background: rgba(20, 184, 166, 0.2); border: 1px solid rgba(20, 184, 166, 0.4); padding: var(--spacing-xs) var(--spacing-md); border-radius: 50px; font-size: 0.875rem; font-weight: 500; margin-bottom: var(--spacing-lg); }
.badge-icon { display: flex; align-items: center; justify-content: center; width: 20px; height: 20px; }
.badge-icon svg { width: 100%; height: 100%; fill: var(--color-success); }

.hero-content h1 { color: var(--color-white); font-size: clamp(2.5rem, 6vw, 3.5rem); margin-bottom: var(--spacing-md); text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3); }
.hero-tagline { font-size: clamp(1.125rem, 2.5vw, 1.35rem); opacity: 0.9; font-weight: 400; max-width: 700px; margin: 0 auto var(--spacing-xl); line-height: 1.7; }
.hero-ctas { display: flex; justify-content: center; gap: var(--spacing-md); flex-wrap: wrap; margin-bottom: var(--spacing-xl); }
.hero-rating { display: flex; align-items: center; justify-content: center; gap: var(--spacing-sm); font-size: 0.9375rem; opacity: 0.9; }
.stars { display: flex; gap: 2px; }
.stars svg { width: 20px; height: 20px; fill: #fbbf24; }

/* ----- Buttons ----- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--spacing-sm); padding: var(--spacing-md) var(--spacing-xl); border-radius: var(--radius-md); font-weight: 600; font-size: 1rem; transition: all var(--transition-fast); cursor: pointer; text-decoration: none; }
.btn-primary { background: var(--color-accent); color: var(--color-white); }
.btn-primary:hover { background: var(--color-accent-hover); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-secondary { background: var(--color-primary); color: var(--color-white); }
.btn-secondary:hover { background: var(--color-primary-dark); transform: translateY(-2px); }
.btn-outline { background: transparent; color: var(--color-white); border: 2px solid rgba(255, 255, 255, 0.4); }
.btn-outline:hover { background: rgba(255, 255, 255, 0.1); border-color: rgba(255, 255, 255, 0.6); }
.btn-large { padding: var(--spacing-md) var(--spacing-2xl); font-size: 1.125rem; }
.btn svg { width: 20px; height: 20px; fill: currentColor; }

/* ----- Services Section ----- */
.services { background: var(--color-white); }
.services-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--spacing-lg); }
.service-card { flex: 0 1 340px; background: var(--color-background); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--spacing-xl); text-align: center; transition: all var(--transition-base); }
.service-card:hover { border-color: var(--color-accent); box-shadow: var(--shadow-md); transform: translateY(-4px); }
.service-icon { display: inline-flex; align-items: center; justify-content: center; width: 60px; height: 60px; background: linear-gradient(135deg, var(--color-accent), var(--color-secondary)); border-radius: var(--radius-lg); margin-bottom: var(--spacing-md); }
.service-icon svg { width: 30px; height: 30px; fill: var(--color-white); }
.service-card h3 { margin-bottom: var(--spacing-sm); font-size: 1.25rem; }
.service-card p { color: var(--color-text-secondary); font-size: 0.9375rem; }

/* ----- Why Us Section ----- */
.why-us { background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%); color: var(--color-white); }
.why-us-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-3xl); align-items: center; }
.why-us-content h2 { color: var(--color-white); margin-bottom: var(--spacing-md); }
.why-us-content .lead { color: rgba(255, 255, 255, 0.85); margin-bottom: var(--spacing-xl); }
.benefits-list { display: flex; flex-direction: column; gap: var(--spacing-md); }
.benefits-list li { display: flex; align-items: flex-start; gap: var(--spacing-sm); font-size: 1rem; }
.benefits-list svg { flex-shrink: 0; width: 24px; height: 24px; fill: var(--color-secondary); margin-top: 2px; }
.benefits-list strong { color: var(--color-white); }

.stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-md); }
.stat-card { background: rgba(255, 255, 255, 0.1); border: 1px solid rgba(255, 255, 255, 0.15); border-radius: var(--radius-lg); padding: var(--spacing-xl); text-align: center; backdrop-filter: blur(10px); }
.stat-number { display: block; font-family: var(--font-heading); font-size: 2.5rem; font-weight: 800; color: var(--color-secondary); line-height: 1; margin-bottom: var(--spacing-xs); }
.stat-label { font-size: 0.875rem; color: rgba(255, 255, 255, 0.8); text-transform: uppercase; letter-spacing: 1px; }

/* ----- Reviews Section ----- */
.reviews { background: var(--color-background); }
.reviews-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--spacing-lg); margin-bottom: var(--spacing-xl); }
.review-card { flex: 0 1 360px; background: var(--color-white); border-radius: var(--radius-lg); padding: var(--spacing-xl); box-shadow: var(--shadow-sm); transition: all var(--transition-base); }
.review-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.review-stars { display: flex; gap: 2px; margin-bottom: var(--spacing-md); }
.review-stars svg { width: 18px; height: 18px; fill: #fbbf24; }
.review-text { font-size: 0.9375rem; color: var(--color-text); line-height: 1.7; margin-bottom: var(--spacing-md); }
.review-author { display: flex; align-items: center; gap: var(--spacing-sm); padding-top: var(--spacing-md); border-top: 1px solid var(--color-border); }
.author-name { font-weight: 600; color: var(--color-primary); }
.review-date { font-size: 0.875rem; color: var(--color-text-secondary); }
.reviews-cta { text-align: center; }

/* ----- Contact Section ----- */
.contact { background: var(--color-white); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-3xl); align-items: start; }
.contact-info h2 { margin-bottom: var(--spacing-md); }
.contact-info .lead { margin-bottom: var(--spacing-xl); }
.contact-methods { display: flex; flex-direction: column; gap: var(--spacing-md); }
.contact-method { display: flex; align-items: center; gap: var(--spacing-md); padding: var(--spacing-md); background: var(--color-background); border-radius: var(--radius-lg); transition: all var(--transition-base); }
.contact-method.phone { background: linear-gradient(135deg, var(--color-accent), var(--color-secondary)); color: var(--color-white); }
.contact-method.phone:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.method-icon { display: flex; align-items: center; justify-content: center; width: 48px; height: 48px; background: rgba(255, 255, 255, 0.2); border-radius: var(--radius-md); }
.contact-method:not(.phone) .method-icon { background: var(--color-primary); }
.method-icon svg { width: 24px; height: 24px; fill: var(--color-white); }
.method-content { display: flex; flex-direction: column; }
.method-label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 1px; opacity: 0.8; }
.method-value { font-weight: 600; font-size: 1.125rem; }
.contact-method.phone .method-value { font-size: 1.25rem; }

/* CTA Card */
.cta-card { background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%); color: var(--color-white); padding: var(--spacing-2xl); border-radius: var(--radius-xl); text-align: center; }
.cta-icon { display: inline-flex; align-items: center; justify-content: center; width: 80px; height: 80px; background: rgba(20, 184, 166, 0.2); border-radius: 50%; margin-bottom: var(--spacing-md); }
.cta-icon svg { width: 40px; height: 40px; fill: var(--color-secondary); animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.1); } }
.cta-card h3 { color: var(--color-white); margin-bottom: var(--spacing-sm); }
.cta-card p { color: rgba(255, 255, 255, 0.85); margin-bottom: var(--spacing-lg); }

/* ----- Footer ----- */
.footer { background: var(--color-dark); color: var(--color-white); padding: var(--spacing-3xl) 0 var(--spacing-xl); }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: var(--spacing-2xl); margin-bottom: var(--spacing-2xl); }
.footer-brand .footer-logo { margin-bottom: var(--spacing-md); }
.footer-brand .logo-text { font-size: 1.75rem; color: var(--color-white); }
.footer-brand .logo-sub { color: var(--color-secondary); }
.footer-tagline { color: rgba(255, 255, 255, 0.7); font-size: 0.9375rem; }
.footer h4 { color: var(--color-white); font-family: var(--font-body); font-size: 0.875rem; font-weight: 600; text-transform: uppercase; letter-spacing: 2px; margin-bottom: var(--spacing-md); }
.footer p, .footer a { color: rgba(255, 255, 255, 0.7); font-size: 0.9375rem; line-height: 1.8; }
.footer a:hover { color: var(--color-accent); }
.footer-bottom { padding-top: var(--spacing-lg); border-top: 1px solid rgba(255, 255, 255, 0.1); text-align: center; }
.footer-bottom p { font-size: 0.875rem; color: rgba(255, 255, 255, 0.5); }

/* ----- Animations ----- */
.fade-in-up { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in-up.visible { opacity: 1; transform: translateY(0); }

/* ----- Responsive ----- */
@media (max-width: 992px) {
  .why-us-grid { grid-template-columns: 1fr; gap: var(--spacing-2xl); }
  .stats-grid { max-width: 500px; margin: 0 auto; }
  .contact-grid { grid-template-columns: 1fr; gap: var(--spacing-2xl); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-xl); }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  :root { --header-height: 70px; }
  section { padding: var(--spacing-2xl) 0; }
  .nav { position: fixed; top: var(--header-height); left: 0; right: 0; background: var(--color-white); padding: var(--spacing-lg); box-shadow: var(--shadow-lg); transform: translateY(-100%); opacity: 0; visibility: hidden; transition: all var(--transition-base); }
  .nav.active { transform: translateY(0); opacity: 1; visibility: visible; }
  .nav-list { flex-direction: column; gap: 0; }
  .nav-link { display: block; padding: var(--spacing-md); border-bottom: 1px solid var(--color-border); }
  .header-cta { display: none; }
  .menu-toggle { display: flex; }
  .hero { min-height: auto; padding: calc(var(--header-height) + var(--spacing-2xl)) var(--spacing-md) var(--spacing-2xl); }
  .hero-content { padding: var(--spacing-lg); }
  .hero-ctas { flex-direction: column; align-items: center; }
  .btn { width: 100%; max-width: 300px; }
  .service-card { flex: 0 1 100%; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-sm); }
  .stat-card { padding: var(--spacing-lg); }
  .stat-number { font-size: 2rem; }
  .review-card { flex: 0 1 100%; }
  .footer-grid { grid-template-columns: 1fr; text-align: center; }
  .footer-brand { grid-column: auto; }
}

@media (max-width: 480px) {
  .logo-text { font-size: 1.25rem; }
  .logo-sub { font-size: 0.625rem; }
  .hero-content h1 { font-size: 2rem; }
  .hero-badge { font-size: 0.75rem; padding: var(--spacing-xs) var(--spacing-sm); }
}