:root {
  --ink: #162033;
  --muted: #5b6678;
  --line: #d7e0ea;
  --blue: #0f5f9f;
  --blue-dark: #153b60;
  --orange: #df6b2d;
  --warm: #fff8f1;
  --ice: #eef7fb;
  --paper: #ffffff;
  --shadow: 0 16px 42px rgba(22, 32, 51, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  color: var(--ink);
  background: #f6f8fb;
  font-family: Arial, "Helvetica Neue", sans-serif;
  line-height: 1.45;
  overflow-x: hidden;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.97);
  border-bottom: 1px solid var(--line);
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 18px;
  padding: 8px 18px;
  color: #fff;
  background: var(--blue-dark);
  font-size: 13px;
  font-weight: 700;
  text-align: center;
}

.topbar span {
  color: #dce8f5;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1180px;
  min-height: 64px;
  margin: 0 auto;
  padding: 0 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: #fff;
  background: var(--blue);
  border: 3px solid #d8ebf7;
  border-radius: 8px;
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: #334155;
  font-size: 14px;
  font-weight: 800;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--ink);
}

.hero {
  position: relative;
  min-height: 650px;
  overflow: hidden;
  color: #fff;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url("./assets/hero-hvac.svg");
  background-position: center right;
  background-size: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(12, 24, 39, 0.92), rgba(12, 24, 39, 0.68) 48%, rgba(12, 24, 39, 0.32)),
    linear-gradient(0deg, rgba(12, 24, 39, 0.2), rgba(12, 24, 39, 0));
}

.hero-content {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 1180px;
  min-height: 650px;
  margin: 0 auto;
  padding: 70px 24px 96px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--orange);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(44px, 6vw, 78px);
  line-height: 0.98;
  letter-spacing: 0;
}

.hero h1 span {
  display: block;
}

.hero-copy {
  max-width: 620px;
  margin: 22px 0 0;
  color: #eef5fb;
  font-size: 21px;
}

.hero-actions,
.trust-strip,
.replacement-actions,
.final-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 900;
  text-align: center;
}

.button.primary {
  color: #fff;
  background: var(--orange);
}

.button.secondary {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.62);
  background: rgba(255, 255, 255, 0.08);
}

.button.text-link {
  min-height: 48px;
  color: var(--blue-dark);
  background: #fff;
  border-color: #bfd1e1;
}

.trust-strip span {
  padding: 8px 11px;
  color: #eef6ff;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 800;
}

.quick-panel {
  position: relative;
  z-index: 4;
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 28px;
  max-width: 1120px;
  margin: -54px auto 0;
  padding: 24px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.quick-panel h2 {
  margin: 0;
  font-size: clamp(28px, 3vw, 38px);
  line-height: 1.05;
}

.quick-form {
  display: grid;
  grid-template-columns: 1fr 0.8fr auto;
  gap: 12px;
  align-items: end;
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

input,
select {
  width: 100%;
  min-height: 48px;
  padding: 0 12px;
  color: var(--ink);
  background: #fff;
  border: 1px solid #c7d2df;
  border-radius: 8px;
  font: inherit;
}

.form-status {
  grid-column: 1 / -1;
  min-height: 20px;
  margin: 0;
  color: var(--blue-dark);
  font-weight: 800;
}

.section {
  max-width: 1180px;
  margin: 0 auto;
  padding: 88px 24px;
}

.section-heading {
  max-width: 710px;
  margin-bottom: 28px;
}

h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.05;
  letter-spacing: 0;
}

h3 {
  margin: 16px 0 8px;
  font-size: 20px;
}

p {
  color: var(--muted);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.service-grid article,
.confidence-grid div,
.feedback-grid blockquote,
.replacement-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.service-grid article {
  display: flex;
  min-height: 250px;
  flex-direction: column;
  padding: 24px;
}

.service-grid article a {
  margin-top: auto;
  color: var(--blue);
  font-weight: 900;
}

.service-icon {
  display: block;
  width: 44px;
  height: 44px;
  border-radius: 8px;
}

.service-icon.heat-cool {
  background: linear-gradient(135deg, #c8e8fb 0 48%, #df6b2d 52% 100%);
}

.service-icon.tune {
  background: linear-gradient(135deg, #d8f0df, #398960);
}

.service-icon.replace {
  background: linear-gradient(135deg, #dbe7f2, #153b60);
}

.replacement {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 390px;
  gap: 40px;
  align-items: center;
  max-width: 1180px;
  margin: 0 auto;
  padding: 76px 24px;
  background: var(--warm);
  border-top: 1px solid #ead8c8;
  border-bottom: 1px solid #ead8c8;
}

.replacement-copy p {
  max-width: 650px;
}

.replacement-card {
  padding: 26px;
  box-shadow: 0 12px 26px rgba(22, 32, 51, 0.08);
}

.replacement-card h3 {
  margin-top: 0;
}

.replacement-card ul {
  display: grid;
  gap: 12px;
  margin: 0;
  padding-left: 20px;
  color: var(--ink);
  font-weight: 800;
}

.confidence {
  padding-top: 76px;
}

.confidence-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.confidence-grid div {
  padding: 22px;
}

.confidence-grid strong {
  display: block;
  color: var(--blue-dark);
  font-size: 18px;
}

.feedback {
  padding-top: 0;
}

.feedback-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.feedback-grid blockquote {
  margin: 0;
  padding: 24px;
}

.feedback-grid p {
  margin: 0;
  color: var(--ink);
  font-size: 22px;
  font-weight: 800;
  line-height: 1.25;
}

.feedback-grid cite {
  display: block;
  margin-top: 14px;
  color: var(--muted);
  font-style: normal;
  font-weight: 800;
}

.final-cta {
  max-width: 1180px;
  margin: 0 auto 72px;
  padding: 52px 24px;
  color: #fff;
  background: var(--blue-dark);
  border-radius: 8px;
}

.final-cta .eyebrow,
.final-cta p {
  color: #ffc49d;
}

.final-cta h2 {
  max-width: 760px;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px 24px;
  color: #dce7f4;
  background: #101c2d;
}

.footer div {
  display: grid;
  gap: 4px;
}

.footer span {
  color: #9fb0c4;
}

@media (min-width: 1440px) {
  .hero,
  .hero-content {
    min-height: 700px;
  }
}

@media (max-width: 980px) {
  .quick-panel,
  .replacement,
  .confidence-grid {
    grid-template-columns: 1fr 1fr;
  }

  .quick-form,
  .service-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .topbar {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 12px;
  }

  .nav {
    padding: 0 16px;
  }

  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    right: 16px;
    left: 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
  }

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

  .nav-links a {
    padding: 12px;
  }

  .hero,
  .hero-content {
    min-height: 560px;
  }

  .hero-bg {
    background-position: 62% center;
  }

  .hero-overlay {
    background: rgba(12, 24, 39, 0.78);
  }

  .hero-content {
    padding: 44px 16px 86px;
  }

  .hero h1 {
    font-size: 38px;
  }

  .hero-copy {
    max-width: 420px;
    font-size: 18px;
  }

  .quick-panel {
    grid-template-columns: 1fr;
    margin: -38px 16px 0;
    padding: 20px;
  }

  .quick-panel h2 {
    max-width: 330px;
    font-size: 28px;
  }

  .quick-panel p {
    max-width: 330px;
  }

  .replacement,
  .confidence-grid,
  .feedback-grid {
    grid-template-columns: 1fr;
  }

  .section,
  .replacement {
    padding: 62px 16px;
  }

  .final-cta {
    margin: 0 16px 56px;
    padding: 42px 20px;
  }
}

@media (max-width: 430px) {
  .topbar {
    flex-direction: column;
    align-items: center;
    gap: 2px;
    text-align: center;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

  .hero,
  .hero-content {
    min-height: 590px;
  }

  .hero-content {
    justify-content: flex-start;
    padding-top: 38px;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero-actions,
  .replacement-actions,
  .final-actions {
    display: grid;
    width: 100%;
  }

  .button {
    width: 100%;
  }

  .trust-strip {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .trust-strip span {
    font-size: 12px;
  }

  .quick-panel h2 {
    max-width: 280px;
    font-size: 24px;
  }

  .quick-panel p {
    max-width: 280px;
  }

  .footer {
    display: grid;
  }
}

@media (max-width: 340px) {
  .hero h1 {
    font-size: 29px;
  }

  .hero-copy {
    font-size: 16px;
  }

  .trust-strip {
    grid-template-columns: 1fr;
  }

  .quick-panel h2 {
    max-width: 250px;
    font-size: 22px;
  }
}