:root {
  --bg: #07110f;
  --bg-soft: #0b1714;
  --panel: #101f1b;
  --panel-2: #132722;
  --text: #f3f7f2;
  --muted: #a9b8b2;
  --line: rgba(229, 238, 231, 0.14);
  --green: #18b878;
  --green-dark: #0c6d4a;
  --gold: #d7aa54;
  --red: #cf3f34;
  --shadow: 0 28px 70px rgba(0, 0, 0, 0.42);
  font-family: Inter, Manrope, Poppins, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}

body.nav-open {
  overflow: hidden;
}

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

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

button,
input,
select,
textarea {
  font: inherit;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px clamp(18px, 4vw, 58px);
  border-bottom: 1px solid var(--line);
  background: rgba(5, 13, 11, 0.78);
  backdrop-filter: blur(18px);
}

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

.brand img {
  width: 46px;
  height: 46px;
  object-fit: contain;
  filter: drop-shadow(0 0 20px rgba(24, 184, 120, 0.18));
}

.brand strong,
.brand small {
  display: block;
  letter-spacing: 0;
}

.brand strong {
  font-size: 1rem;
  line-height: 1.1;
}

.brand small {
  color: var(--muted);
  font-size: 0.76rem;
}

.site-nav {
  display: flex;
  gap: 30px;
  color: var(--muted);
  font-size: 0.94rem;
}

.site-nav a:hover {
  color: var(--text);
}

.nav-toggle {
  display: none;
}

.hero {
  position: relative;
  min-height: 96vh;
  overflow: hidden;
  display: grid;
  align-items: end;
  padding: 120px clamp(18px, 5vw, 76px) clamp(56px, 8vw, 110px);
}

.hero-image,
.hero-shade {
  position: absolute;
  inset: 0;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(3, 10, 9, 0.96), rgba(3, 10, 9, 0.72) 46%, rgba(3, 10, 9, 0.2)),
    linear-gradient(0deg, var(--bg), rgba(7, 17, 15, 0.04) 48%);
}

.hero-inner {
  position: relative;
  max-width: 980px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--gold);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  line-height: 1.03;
  letter-spacing: 0;
}

h1 {
  margin-bottom: 22px;
  font-size: clamp(3rem, 7vw, 7.4rem);
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(2.1rem, 4.6vw, 5rem);
}

h3 {
  font-size: 1.28rem;
}

.hero-copy,
.intro p,
.section-head,
.feature-project p,
.project-grid p,
.service-list p,
.system-copy p,
.contact p {
  color: var(--muted);
}

.hero-copy {
  max-width: 720px;
  font-size: clamp(1.06rem, 1.5vw, 1.28rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 900;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  background: var(--green);
  color: #04100c;
}

.button.secondary {
  border-color: rgba(215, 170, 84, 0.48);
  background: rgba(215, 170, 84, 0.1);
  color: #f5d99c;
}

.credibility {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-block: 1px solid var(--line);
  background: #091613;
}

.credibility div {
  min-height: 138px;
  padding: 26px clamp(18px, 3vw, 36px);
  border-right: 1px solid var(--line);
}

.credibility strong,
.credibility span {
  display: block;
}

.credibility strong {
  color: var(--green);
  font-size: clamp(2rem, 3.4vw, 4rem);
  line-height: 1;
}

.credibility span {
  max-width: 220px;
  margin-top: 10px;
  color: var(--muted);
}

.section {
  padding: clamp(74px, 10vw, 135px) clamp(18px, 5vw, 76px);
}

.intro {
  display: grid;
  grid-template-columns: minmax(180px, 0.28fr) minmax(0, 1fr);
  gap: clamp(26px, 5vw, 72px);
  background: var(--bg);
}

.intro p {
  max-width: 780px;
  font-size: 1.08rem;
}

.section-head {
  max-width: 820px;
  margin-bottom: 38px;
}

.projects {
  background: var(--bg-soft);
}

.feature-project {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.56fr);
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
  box-shadow: var(--shadow);
}

.feature-project img {
  width: 100%;
  height: 100%;
  min-height: 460px;
  object-fit: cover;
}

.feature-project div {
  display: grid;
  align-content: center;
  padding: clamp(28px, 4vw, 54px);
  background: var(--panel);
}

.feature-project span,
.project-grid span,
.service-list span {
  color: var(--gold);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.project-grid article {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.project-grid img {
  width: 100%;
  aspect-ratio: 1.22;
  object-fit: cover;
}

.project-grid div {
  padding: 24px;
}

.service-list {
  display: grid;
  border-top: 1px solid var(--line);
}

.service-list article {
  display: grid;
  grid-template-columns: 80px minmax(180px, 0.34fr) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.service-list h3,
.service-list p {
  margin-bottom: 0;
}

.systems {
  display: grid;
  grid-template-columns: minmax(280px, 0.44fr) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 76px);
  align-items: center;
  background: #081310;
}

.system-image {
  overflow: hidden;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.system-image img {
  width: 100%;
  height: min(72vh, 760px);
  object-fit: cover;
}

.system-copy {
  max-width: 780px;
}

.calculator {
  background: var(--bg-soft);
}

.calculator-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.48fr);
  gap: 16px;
}

#diesel-form,
.lead-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

label {
  display: grid;
  gap: 8px;
  color: #dfe9e4;
  font-size: 0.92rem;
  font-weight: 800;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid rgba(229, 238, 231, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.065);
  color: var(--text);
  padding: 13px 14px;
}

textarea {
  resize: vertical;
}

select option {
  color: #07110f;
}

.calculator-panel aside {
  display: grid;
  align-content: center;
  justify-items: start;
  padding: 30px;
  border: 1px solid rgba(215, 170, 84, 0.28);
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(215, 170, 84, 0.14), rgba(24, 184, 120, 0.11)), var(--panel-2);
}

.calculator-panel aside span,
.calculator-panel aside p {
  color: var(--muted);
}

.calculator-panel strong {
  margin: 8px 0;
  color: var(--gold);
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 1;
}

.contact {
  display: grid;
  grid-template-columns: minmax(260px, 0.42fr) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 76px);
}

.wide {
  grid-column: 1 / -1;
}

.whatsapp {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 15;
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  border-radius: 999px;
  background: var(--green);
  color: #04100c;
  font-weight: 900;
  box-shadow: var(--shadow);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 30px clamp(18px, 5vw, 76px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: #050c0a;
}

@media (max-width: 960px) {
  .nav-toggle {
    display: grid;
    width: 44px;
    height: 44px;
    place-content: center;
    gap: 6px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.06);
  }

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

  .site-nav {
    position: fixed;
    inset: 78px 16px auto;
    display: none;
    flex-direction: column;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #091613;
  }

  body.nav-open .site-nav {
    display: flex;
  }

  .credibility,
  .intro,
  .feature-project,
  .systems,
  .calculator-panel,
  .contact {
    grid-template-columns: 1fr;
  }

  .credibility {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .project-grid {
    grid-template-columns: 1fr;
  }

  .service-list article {
    grid-template-columns: 64px 1fr;
  }

  .service-list p {
    grid-column: 2;
  }
}

@media (max-width: 620px) {
  .brand img {
    width: 40px;
    height: 40px;
  }

  .hero {
    min-height: 92vh;
    padding-top: 104px;
  }

  h1 {
    font-size: clamp(2.6rem, 13vw, 4.1rem);
  }

  .hero-actions,
  .site-footer {
    flex-direction: column;
    align-items: stretch;
  }

  .button {
    width: 100%;
  }

  .credibility {
    grid-template-columns: 1fr;
  }

  #diesel-form,
  .lead-form {
    grid-template-columns: 1fr;
  }

  .wide {
    grid-column: auto;
  }

  .service-list article {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .service-list p {
    grid-column: auto;
  }
}