/* ================================================
   AMG HVAC Solutions LLC — Stockbridge, GA
   ================================================ */

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

/* --- Custom Properties --- */
:root {
  --color-navy: #1b2a4a;
  --color-copper: #b35c20;
  --color-copper-hover: #9a4e1a;
  --color-cool: #3d6b99;
  --color-cool-pale: #e8eff6;
  --color-copper-pale: #f6ede6;
  --color-bg: #f5f7fa;
  --color-white: #ffffff;
  --color-text: #2c3444;
  --color-text-secondary: #5a6577;
  --color-border: #dce1e8;
  --color-star: #8f6d08;
  --color-nav-bg: rgba(245, 247, 250, 0.82);
  --color-nav-mobile-bg: rgba(245, 247, 250, 0.96);
  --color-white-muted: rgba(255, 255, 255, 0.72);
  --color-shadow: rgba(27, 42, 74, 0.07);
  --radius: 10px;
  --radius-lg: 16px;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --max-width: 1100px;
  --nav-height: 64px;
}

/* --- Base --- */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

h1, h2, h3 {
  line-height: 1.15;
  color: var(--color-navy);
  font-weight: 700;
}

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

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.12s ease;
  border: 2px solid transparent;
  min-height: 48px;
  text-decoration: none;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--color-copper);
  color: var(--color-white);
  border-color: var(--color-copper);
}

.btn-primary:hover {
  background: var(--color-copper-hover);
  border-color: var(--color-copper-hover);
}

.btn-outline {
  background: transparent;
  color: var(--color-navy);
  border-color: var(--color-navy);
}

.btn-outline:hover {
  background: var(--color-navy);
  color: var(--color-white);
}

.btn-white {
  background: var(--color-white);
  color: var(--color-navy);
  border-color: var(--color-white);
}

.btn-white:hover {
  background: transparent;
  color: var(--color-white);
  border-color: var(--color-white);
}

.btn-ghost {
  background: transparent;
  color: var(--color-white);
  border-color: var(--color-white-muted);
}

.btn-ghost:hover {
  background: var(--color-white);
  color: var(--color-navy);
  border-color: var(--color-white);
}

.btn-block {
  width: 100%;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--color-nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
  transition: box-shadow 0.3s ease;
}

.nav.scrolled {
  box-shadow: 0 2px 24px var(--color-shadow);
}

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

.nav-left {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-phone {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-copper);
  white-space: nowrap;
  transition: color 0.2s ease;
}

.nav-phone:hover {
  color: var(--color-copper-hover);
}

.nav-brand {
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-navy);
  white-space: nowrap;
}

.nav-divider {
  width: 1px;
  height: 20px;
  background: var(--color-border);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  transition: color 0.2s ease;
  padding: 8px 0;
  min-height: 34px;
  display: inline-flex;
  align-items: center;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-navy);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  min-height: 44px;
  min-width: 44px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-navy);
  border-radius: 1px;
  transition: transform 0.3s ease, opacity 0.25s ease;
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(to right, var(--color-cool), var(--color-copper));
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 60px 24px;
  width: 100%;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
  margin-bottom: 14px;
}

.hero h1 .accent {
  color: var(--color-copper);
}

.hero-sub {
  font-size: clamp(1.05rem, 1.8vw, 1.18rem);
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  max-width: 440px;
  line-height: 1.55;
}

/* Temperature gradient visual — encodes heating (copper) + cooling (blue) duality */
.hero-visual {
  position: relative;
  height: 360px;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(56px);
}

.orb--cool {
  width: 260px;
  height: 260px;
  background: var(--color-cool);
  opacity: 0.2;
  top: 8%;
  right: 12%;
}

.orb--warm {
  width: 300px;
  height: 300px;
  background: var(--color-copper);
  opacity: 0.15;
  top: 28%;
  right: -8%;
}

/* --- Rating badge --- */
.rating {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 14px 20px;
  background: var(--color-white);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.rating-stars {
  color: var(--color-star);
  font-size: 1.15rem;
  letter-spacing: 2px;
  line-height: 1;
}

.rating-text {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--color-navy);
  line-height: 1.3;
}

/* --- About --- */
.about {
  padding: 48px 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

.about-text h2 {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  margin-bottom: 14px;
}

.about-text > p {
  margin-bottom: 24px;
  line-height: 1.7;
}

/* Visual block — temperature-gradient panel encoding heating/cooling range */
.about-visual {
  position: relative;
  height: 320px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-white);
  border: 1px solid var(--color-border);
}

.about-visual-inner {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 24px;
  padding: 32px;
}

.temp-bar {
  width: 6px;
  height: 160px;
  border-radius: 3px;
  background: linear-gradient(to bottom, var(--color-cool), var(--color-copper));
}

.temp-labels {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 100px;
  position: absolute;
  right: 48px;
  top: 50%;
  transform: translateY(-50%);
}

.temp-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.temp-label--cool {
  color: var(--color-cool);
}

.temp-label--warm {
  color: var(--color-copper);
}

.about-visual-glow--cool {
  position: absolute;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: var(--color-cool);
  opacity: 0.08;
  filter: blur(40px);
  top: 10%;
  left: 20%;
}

.about-visual-glow--warm {
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: var(--color-copper);
  opacity: 0.06;
  filter: blur(40px);
  bottom: 10%;
  right: 15%;
}

/* --- Services Preview (homepage) --- */
.services-preview {
  padding: 48px 0;
}

.services-preview > .container > h2 {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  margin-bottom: 8px;
}

.services-preview > .container > .services-sub {
  color: var(--color-text-secondary);
  margin-bottom: 36px;
  font-size: 1.02rem;
}

.services-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 48px;
}

.service-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--color-border);
}

.service-accent {
  width: 3px;
  height: 32px;
  border-radius: 2px;
  flex-shrink: 0;
  margin-top: 3px;
}

.service-accent--cool {
  background: var(--color-cool);
}

.service-accent--warm {
  background: var(--color-copper);
}

.service-accent--both {
  background: linear-gradient(to bottom, var(--color-cool), var(--color-copper));
}

.service-info h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.service-info p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

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

/* --- CTA Section --- */
.cta {
  background: var(--color-navy);
  padding: 56px 0;
  text-align: center;
  position: relative;
}

.cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(to right, var(--color-cool), var(--color-copper));
}

.cta h2 {
  color: var(--color-white);
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  margin-bottom: 10px;
}

.cta > .container > p {
  color: var(--color-white-muted);
  font-size: 1.05rem;
  margin-bottom: 28px;
}

.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Footer --- */
.footer {
  padding: 28px 0;
  text-align: center;
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  font-size: 0.84rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.footer a {
  color: var(--color-copper);
  transition: color 0.2s ease;
}

.footer a:hover {
  color: var(--color-copper-hover);
}

.footer-sep {
  margin: 0 8px;
  color: var(--color-border);
}

/* ================================================
   Services Page
   ================================================ */
.page-hero {
  padding: calc(var(--nav-height) + 52px) 0 44px;
  text-align: center;
  position: relative;
}

.page-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(to right, var(--color-cool), var(--color-copper));
}

.page-hero h1 {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  margin-bottom: 10px;
}

.page-hero p {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  max-width: 460px;
  margin: 0 auto;
}

.services-full {
  padding: 48px 0;
}

.service-block {
  position: relative;
  padding: 28px 0 28px 28px;
  border-bottom: 1px solid var(--color-border);
}

.service-block:last-child {
  border-bottom: none;
}

.service-block::before {
  content: '';
  position: absolute;
  left: 0;
  top: 28px;
  width: 3px;
  height: 26px;
  border-radius: 2px;
}

.service-block--cool::before {
  background: var(--color-cool);
}

.service-block--warm::before {
  background: var(--color-copper);
}

.service-block--both::before {
  background: linear-gradient(to bottom, var(--color-cool), var(--color-copper));
}

.service-block h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.service-block p {
  color: var(--color-text-secondary);
  max-width: 660px;
  line-height: 1.7;
}

/* ================================================
   Contact Page
   ================================================ */
.contact-section {
  padding: 48px 0;
}

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

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

.contact-detail {
  margin-bottom: 24px;
}

.contact-detail-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: 4px;
}

.contact-detail-value {
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.5;
}

.contact-detail-value a {
  color: var(--color-copper);
  transition: color 0.2s ease;
}

.contact-detail-value a:hover {
  color: var(--color-copper-hover);
}

.contact-note {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  font-style: italic;
  margin-top: 4px;
}

.contact-info .rating {
  margin-top: 8px;
}

.contact-form-card {
  background: var(--color-white);
  padding: 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.contact-form-card h2 {
  font-size: 1.25rem;
  margin-bottom: 24px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

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

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--color-navy);
}

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

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-cool);
}

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

.form-submit {
  margin-top: 4px;
}

.form-success {
  text-align: center;
  padding: 48px 20px;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-navy);
  line-height: 1.5;
}

/* ================================================
   Scroll Reveal
   ================================================ */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal-delay="1"] { transition-delay: 0.12s; }
[data-reveal-delay="2"] { transition-delay: 0.24s; }
[data-reveal-delay="3"] { transition-delay: 0.36s; }

/* ================================================
   Reduced Motion
   ================================================ */
@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  [data-reveal-delay="1"],
  [data-reveal-delay="2"],
  [data-reveal-delay="3"] {
    transition-delay: 0s;
  }
  html { scroll-behavior: auto; }
  .btn { transition: none; }
  .nav { transition: none; }
  .nav-toggle span { transition: none; }
  .nav-links a { transition: none; }
  .nav-phone { transition: none; }
  .contact-detail-value a { transition: none; }
  .footer a { transition: none; }
  .form-group input,
  .form-group textarea,
  .form-group select { transition: none; }
}

/* ================================================
   Responsive
   ================================================ */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-nav-mobile-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 12px 24px 16px;
    flex-direction: column;
    gap: 0;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-links a:last-child {
    border-bottom: none;
  }

  /* Hero */
  .hero {
    min-height: auto;
    padding-bottom: 48px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    padding: 48px 24px 0;
  }

  .hero-visual {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    height: auto;
    opacity: 0.35;
    z-index: 0;
  }

  /* About */
  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .about-visual {
    height: 200px;
    order: -1;
  }

  .temp-labels {
    gap: 60px;
    right: 36px;
  }

  .temp-bar {
    height: 100px;
  }

  /* Services preview */
  .services-list {
    grid-template-columns: 1fr;
  }

  /* CTA */
  .cta-actions {
    flex-direction: column;
    align-items: center;
  }

  .cta-actions .btn {
    width: 100%;
    max-width: 300px;
  }

  /* Contact */
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  :root {
    --nav-height: 56px;
  }

  .nav-left {
    gap: 10px;
  }

  .nav-brand {
    font-size: 0.88rem;
  }

  .nav-phone {
    font-size: 0.88rem;
  }

  .hero-inner {
    padding: 36px 20px 0;
  }

  .hero-sub {
    margin-bottom: 28px;
  }

  .container {
    padding: 0 20px;
  }

  .contact-form-card {
    padding: 24px 20px;
  }
}