/* ========================================
   1ST Class HVAC Atlanta — Stylesheet
   ======================================== */

:root {
  --color-primary: #1b3a5c;
  --color-primary-dark: #0f2440;
  --color-accent: #0f766e;
  --color-accent-light: #ccfbf1;
  --color-warm: #b45309;
  --color-warm-light: #fef3c7;
  --color-stars: #f59e0b;
  --color-bg: #f5f7fa;
  --color-bg-subtle: #edf1f7;
  --color-surface: #ffffff;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-inverse: #ffffff;
  --color-border: #e2e8f0;
  --color-tint-cool: #f0fdfa;
  --color-tag-both: #dbeafe;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --max-width: 1140px;
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol { list-style: none; }

/* Layout */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section-pad { padding: 64px 0; }
.alt-bg { background: var(--color-surface); }

/* Typography */
h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.025em;
  color: var(--color-text);
}

h2 {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.3;
}

p { line-height: 1.65; }

.cool { color: var(--color-accent); }
.warm { color: var(--color-warm); }
.section-title { margin-bottom: 40px; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-body);
  min-height: 48px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: 0 4px 14px rgba(27, 58, 92, 0.25);
}
.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(27, 58, 92, 0.35);
  background: var(--color-primary-dark);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.btn-outline-dark {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-border);
}
.btn-outline-dark:hover {
  border-color: var(--color-primary);
}

.btn-accent {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  box-shadow: 0 4px 14px rgba(15, 118, 110, 0.3);
}
.btn-accent:hover {
  box-shadow: 0 6px 20px rgba(15, 118, 110, 0.4);
}

/* Stock photo label */
.stock-label {
  display: block;
  text-align: center;
  font-size: 0.7rem;
  color: var(--color-text-secondary);
  margin-top: 6px;
  font-style: italic;
}

/* ========================================
   NAV
   ======================================== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
  height: 64px;
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  height: 100%;
  gap: 20px;
}

.nav-phone {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.85rem;
  white-space: nowrap;
  min-height: 34px;
  display: flex;
  align-items: center;
  transition: background 0.2s;
}
.nav-phone:hover { background: var(--color-primary); }

.nav-brand {
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--color-primary);
  white-space: nowrap;
}

.nav-links {
  display: flex;
  gap: 28px;
  margin-left: auto;
}

.nav-links a {
  font-weight: 500;
  font-size: 0.92rem;
  color: var(--color-text-secondary);
  transition: color 0.2s;
  padding: 6px 0;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 34px;
  height: 34px;
  position: relative;
  margin-left: auto;
  padding: 0;
  border-radius: var(--radius-sm);
}

.nav-toggle span {
  position: absolute;
  left: 6px;
  width: 22px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.nav-toggle span:nth-child(1) { top: 10px; }
.nav-toggle span:nth-child(2) { top: 16px; }
.nav-toggle span:nth-child(3) { top: 22px; }

.nav-toggle.active span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ========================================
   HERO
   ======================================== */
.hero {
  padding: 72px 0 48px;
  background: linear-gradient(160deg, var(--color-bg) 0%, var(--color-bg-subtle) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero h1 { margin-bottom: 16px; }

.hero-sub {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  max-width: 460px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-media { position: relative; }

.hero-img {
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(27, 58, 92, 0.14), 0 4px 16px rgba(27, 58, 92, 0.08);
  aspect-ratio: 3 / 4;
  object-fit: cover;
  width: 100%;
}

/* ========================================
   STATS
   ======================================== */
.stats {
  background: var(--color-primary);
  padding: 36px 0;
}

.stats-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
}

.stat { text-align: center; }

.stat-value {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--color-text-inverse);
  line-height: 1.2;
}

.stat-label {
  display: block;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 4px;
}

.stars {
  color: var(--color-stars);
  font-size: 0.95rem;
  letter-spacing: 1px;
}

.stat-divider {
  width: 1px;
  height: 36px;
  background: rgba(255, 255, 255, 0.18);
  flex-shrink: 0;
}

/* ========================================
   ABOUT
   ======================================== */
.about { background: var(--color-bg); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.about-photo img {
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.about-text h2 { margin-bottom: 18px; }

.about-text p {
  margin-bottom: 14px;
  color: var(--color-text-secondary);
}
.about-text p:last-of-type { margin-bottom: 0; }

/* ========================================
   SERVICES PREVIEW (homepage)
   ======================================== */
.services-list { max-width: 780px; }

.service-item {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--color-border);
  transition: padding-left 0.3s ease;
}
.service-item:last-child { border-bottom: none; }
.service-item:hover { padding-left: 8px; }

.service-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-accent);
  opacity: 0.3;
  line-height: 1;
  min-width: 50px;
  padding-top: 2px;
  flex-shrink: 0;
}

.service-body h3 { margin-bottom: 8px; }

.service-body p {
  color: var(--color-text-secondary);
  font-size: 0.92rem;
}

.services-cta { margin-top: 36px; }

/* ========================================
   SERVICES PAGE (detail)
   ======================================== */
.page-header {
  background: linear-gradient(135deg, var(--color-tint-cool) 0%, var(--color-bg) 100%);
  padding: 64px 0 40px;
}

.page-header h1 { margin-bottom: 12px; }

.page-header p {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  max-width: 520px;
}

.service-detail {
  display: flex;
  gap: 32px;
  padding: 40px 0;
  border-bottom: 1px solid var(--color-border);
  align-items: flex-start;
}
.service-detail:last-child { border-bottom: none; }

.service-detail .service-num {
  font-size: 2.5rem;
  min-width: 64px;
  opacity: 0.25;
  padding-top: 6px;
}

.service-detail-content { max-width: 640px; }

.service-tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.tag-cool {
  background: var(--color-accent-light);
  color: var(--color-accent);
}
.tag-warm {
  background: var(--color-warm-light);
  color: var(--color-warm);
}
.tag-both {
  background: var(--color-tag-both);
  color: var(--color-primary);
}

.service-detail-content h2 {
  font-size: 1.45rem;
  margin-bottom: 14px;
}

.service-detail-content p {
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ========================================
   RATING BAND
   ======================================== */
.rating-band {
  background: var(--color-accent);
  padding: 48px 0;
  text-align: center;
}

.rating-stars {
  font-size: 1.8rem;
  color: var(--color-stars);
  letter-spacing: 3px;
  margin-bottom: 10px;
}

.rating-text {
  color: var(--color-text-inverse);
  font-size: 1.1rem;
}

/* ========================================
   CTA BAND
   ======================================== */
.cta-band {
  background: var(--color-primary-dark);
  padding: 72px 0;
  text-align: center;
}

.cta-content h2 {
  color: var(--color-text-inverse);
  margin-bottom: 12px;
}

.cta-content p {
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 28px;
  font-size: 1.05rem;
}

/* ========================================
   CONTACT PAGE
   ======================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 56px;
  align-items: flex-start;
}

.contact-block {
  margin-bottom: 28px;
}
.contact-block:last-child { margin-bottom: 0; }

.contact-block-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
}

.contact-block-value {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.5;
}

.contact-block-value a {
  color: var(--color-accent);
  font-weight: 600;
  transition: color 0.2s;
}
.contact-block-value a:hover { color: var(--color-primary); }

.contact-form-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.contact-form-card h2 {
  margin-bottom: 24px;
  font-size: 1.35rem;
}

.form-group { margin-bottom: 18px; }

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 0.88rem;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 44px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group textarea {
  min-height: 110px;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.12);
  background: var(--color-surface);
}

.form-submit {
  margin-top: 6px;
}

.form-submit .btn {
  width: 100%;
}

.form-success {
  text-align: center;
  padding: 24px;
  color: var(--color-accent);
  font-weight: 600;
  font-size: 1.05rem;
  display: none;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  background: var(--color-primary);
  padding: 44px 0 20px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.88rem;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  margin-bottom: 28px;
}

.footer-brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-text-inverse);
  margin-bottom: 10px;
}

.footer-info p { margin-bottom: 6px; }
.footer-info a { transition: color 0.2s; }
.footer-info a:hover { color: var(--color-text-inverse); }

.footer-nav {
  display: flex;
  gap: 24px;
}
.footer-nav a { transition: color 0.2s; }
.footer-nav a:hover { color: var(--color-text-inverse); }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 16px;
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.4);
}

/* ========================================
   SCROLL ANIMATIONS
   ======================================== */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.reveal-right {
  transform: translateX(20px) translateY(0);
}

.reveal.active {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal.reveal-right {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .service-item {
    transition: none;
  }
  .btn {
    transition: none;
  }
}

/* ========================================
   RESPONSIVE — Tablet
   ======================================== */
@media (max-width: 768px) {
  h1 { font-size: 2.2rem; }
  h2 { font-size: 1.5rem; }
  .section-pad { padding: 52px 0; }

  /* Nav */
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    flex-direction: column;
    padding: 16px 24px 20px;
    gap: 6px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 0; }
  .nav-toggle { display: block; }

  /* Hero */
  .hero { padding: 48px 0 36px; }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .hero-img { aspect-ratio: 16 / 10; }

  /* Stats */
  .stats-row {
    flex-direction: column;
    gap: 20px;
  }
  .stat-divider {
    width: 48px;
    height: 1px;
  }

  /* About */
  .about-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  /* Contact */
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  /* Footer */
  .footer-grid {
    flex-direction: column;
    gap: 20px;
  }
}

/* ========================================
   RESPONSIVE — Small phone
   ======================================== */
@media (max-width: 480px) {
  h1 { font-size: 1.8rem; }
  .container { padding: 0 16px; }
  .hero { padding: 32px 0 28px; }

  .hero-actions {
    flex-direction: column;
  }
  .hero-actions .btn { width: 100%; }

  .nav-phone {
    font-size: 0.78rem;
    padding: 6px 10px;
  }
  .nav-brand { font-size: 0.95rem; }

  .service-item {
    flex-direction: column;
    gap: 6px;
  }
  .service-num {
    font-size: 1.4rem;
  }

  .service-detail {
    flex-direction: column;
    gap: 10px;
  }
  .service-detail .service-num {
    font-size: 1.8rem;
  }

  .page-header { padding: 48px 0 28px; }
  .cta-band { padding: 52px 0; }

  .contact-form-card { padding: 24px 18px; }
}