:root {
  --dark: #517052;
  --green: #3f5f4a;
  --tan: #d8c7a3;
  --light: #f6f2ea;
  --white: #ffffff;
  --text: #222222;
  --muted: #5a5a5a;
  --border: #d9d3c7;
  --danger: #7a342d;
  --shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
  --content-width: 1100px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html { scroll-behavior: smooth; }

body {
  font-family: Arial, Helvetica, sans-serif;
  background: var(--light);
  color: var(--text);
  line-height: 1.6;
}

a { color: inherit; }

header {
  background: var(--dark);
  color: var(--white);
  padding: 1rem 2rem;
}

nav {
  max-width: var(--content-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  font-size: 1.4rem;
  font-weight: bold;
  letter-spacing: 0.5px;
}

.logo img {
  display: block;
  width: min(400px, 100%);
  height: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 1.5rem;
}

.nav-links a {
  color: var(--white);
  text-decoration: none;
  font-weight: bold;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  text-decoration: underline;
}

.hero {
  background-color: #1f2a24;
  background-size: cover;
  background-position: center;
  color: var(--white);
  padding: 6rem 2rem;
  text-align: center;
}

.home-page .hero {
  background-image:
    linear-gradient(rgba(31, 42, 36, 0.85), rgba(31, 42, 36, 0.85)),
    url("images/work-truck.png");
}

.heating-page .hero {
  background-image:
    linear-gradient(rgba(31, 42, 36, 0.86), rgba(31, 42, 36, 0.86)),
    url("images/heating-service.png");
}

.cooling-page .hero {
  background-image:
    linear-gradient(rgba(31, 42, 36, 0.82), rgba(31, 42, 36, 0.82)),
    url("images/cooling-service.png");
}

.hero-content {
  max-width: 900px;
  margin: 0 auto;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 0.75rem;
  color: var(--tan);
  font-size: 0.95rem;
  font-weight: bold;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(2.3rem, 5vw, 4.25rem);
  line-height: 1.08;
  margin-bottom: 1rem;
}

.hero h2,
.hero p {
  max-width: 760px;
  margin: 0 auto 2rem;
  font-size: clamp(1.1rem, 2vw, 1.25rem);
  line-height: 1.5;
}

.button {
  display: inline-block;
  background: var(--tan);
  color: var(--dark);
  padding: 0.9rem 1.4rem;
  border: 2px solid var(--tan);
  border-radius: 6px;
  text-decoration: none;
  font-weight: bold;
  margin: 0.25rem;
}

.button:hover,
.button:focus-visible,
button:hover,
button:focus-visible {
  filter: brightness(0.94);
}

.button.secondary {
  background: transparent;
  color: var(--white);
  border-color: var(--white);
}

section { padding: 4rem 2rem; }

.container {
  max-width: var(--content-width);
  margin: 0 auto;
}

.section-title {
  max-width: 800px;
  margin: 0 auto 2.5rem;
  text-align: center;
}

.section-title h2 {
  color: var(--dark);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  line-height: 1.2;
  margin-bottom: 0.65rem;
}

.section-title p,
.card p,
details p { color: var(--muted); }

.services,
.services-grid,
.process-grid,
.areas-grid {
  display: grid;
  gap: 1.5rem;
}

.services,
.services-grid {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.process-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  counter-reset: process-step;
}

.areas-grid {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.card {
  background: var(--white);
  padding: 1.75rem;
  border-radius: 10px;
  box-shadow: var(--shadow);
}

.card h3 {
  color: var(--green);
  margin-bottom: 0.75rem;
}

.about,
.intro,
.service-area { background: var(--white); }

.about-grid,
.intro-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.about-grid { grid-template-columns: 1.2fr 1fr; }
.intro-grid { grid-template-columns: 1.25fr 0.75fr; align-items: start; }

.about h2,
.intro h2 {
  color: var(--dark);
  font-size: 2rem;
  line-height: 1.25;
  margin-bottom: 1rem;
}

.intro p + p { margin-top: 1rem; }

.about-box,
.service-box {
  background: var(--light);
  border-left: 6px solid var(--green);
  border-radius: 6px;
  padding: 1.5rem;
}

.about-box h3,
.service-box h3 {
  color: var(--green);
  margin-bottom: 0.75rem;
}

.service-box ul { padding-left: 1.2rem; }
.service-box li + li { margin-top: 0.45rem; }

.process-card {
  position: relative;
  padding-top: 4rem;
}

.process-card::before {
  counter-increment: process-step;
  content: counter(process-step);
  position: absolute;
  top: 1.25rem;
  left: 1.75rem;
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--green);
  color: var(--white);
  font-weight: bold;
}

.warning {
  background: #fff8ee;
  border: 1px solid #e5c89c;
  border-left: 6px solid var(--tan);
  border-radius: 8px;
  padding: 1.5rem;
  margin-top: 2rem;
}

.warning h3 {
  color: var(--danger);
  margin-bottom: 0.55rem;
}

.area {
  background: var(--light);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  text-align: center;
  font-weight: bold;
  color: var(--green);
}

.faq-list {
  max-width: 850px;
  margin: 0 auto;
}

details {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
}

details + details { margin-top: 1rem; }

summary {
  color: var(--green);
  font-weight: bold;
  cursor: pointer;
}

details p { margin-top: 0.8rem; }

.cta {
  background: var(--green);
  color: var(--white);
  text-align: center;
}

.cta h2 {
  font-size: clamp(1.9rem, 3vw, 2.5rem);
  line-height: 1.2;
  margin-bottom: 0.8rem;
}

.cta p {
  max-width: 700px;
  margin: 0 auto 1.25rem;
}

.contact { background: var(--light); }

form {
  max-width: 700px;
  margin: 0 auto;
  background: var(--white);
  padding: 2rem;
  border-radius: 10px;
  box-shadow: var(--shadow);
}

label {
  display: block;
  margin-top: 1rem;
  font-weight: bold;
}

input,
select,
textarea {
  width: 100%;
  padding: 0.8rem;
  margin-top: 0.35rem;
  border: 1px solid #ccc;
  border-radius: 5px;
  font: inherit;
}

input:focus,
select:focus,
textarea:focus {
  outline: 3px solid rgba(216, 199, 163, 0.55);
  border-color: var(--green);
}

textarea {
  min-height: 130px;
  resize: vertical;
}

button {
  margin-top: 1.5rem;
  background: var(--dark);
  color: var(--white);
  border: none;
  padding: 0.9rem 1.4rem;
  border-radius: 6px;
  font: inherit;
  font-weight: bold;
  cursor: pointer;
}

footer {
  background: var(--dark);
  color: var(--white);
  text-align: center;
  padding: 2rem;
  font-size: 0.95rem;
}

footer a { color: var(--tan); }
footer p + p { margin-top: 0.35rem; }

@media (max-width: 750px) {
  header { padding-inline: 1rem; }

  nav { flex-direction: column; }

  .nav-links {
    justify-content: center;
    gap: 0.75rem 1rem;
  }

  .about-grid,
  .intro-grid { grid-template-columns: 1fr; }

  .hero { padding: 4rem 1.5rem; }

  section { padding: 3rem 1.25rem; }

  form { padding: 1.4rem; }
}