:root {
  --kev-primary: #1a3a5c;
  --kev-accent: #f59e0b;
  --kev-text: #0f172a;
  --kev-muted: #64748b;
  --kev-bg: #f8fafc;
  --kev-card: #ffffff;
  --kev-border: #e2e8f0;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;

  line-height: 1.6;

  font-family:
    system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    sans-serif;

  color: var(--kev-text);
}

.container {
  max-width: 1100px;

  margin: 0 auto;

  padding: 0 1.5rem;
}


.site-header {
  position: sticky;

  top: 0;

  z-index: 100;

  padding: 1rem 0;

  background: var(--kev-primary);

  color: white;

  transition:
    padding 0.2s,
    box-shadow 0.2s;
}


.site-header.scrolled {
  padding: 0.5rem 0;

  box-shadow:
    0 4px 12px rgba(15, 23, 42, 0.15);
}


.inner-header {
  display: flex;

  align-items: center;

  justify-content: space-between;

  height: 80px;
}


.brand {
  color: white;

  text-decoration: none;

  font-size: 1.4rem;

  font-weight: 800;

  letter-spacing: 0.08em;
}


.nav-links {
  display: flex;

  gap: 1.5rem;
}


.nav-links a {
  color: white;

  text-decoration: none;

  font-weight: 500;

  transition:
    color 0.3s ease,
    transform 0.3s ease;
}


.nav-links a:hover {
  color: var(--kev-accent);

  transform: translateY(-2px);
}


.hero {
  padding: 5rem 0;

  text-align: center;

  background: var(--kev-bg);
}


.hero h1 {
  margin-bottom: 1rem;

  color: var(--kev-primary);

  font-size:
    clamp(2rem, 5vw, 3.5rem);

  animation:
    heroFadeIn 0.6s ease-out forwards;
}


.hero-subtitle {
  max-width: 640px;

  margin: 0 auto 2rem;

  color: var(--kev-muted);

  font-size: 1.125rem;

  animation:
    heroFadeIn 0.6s ease-out 0.2s forwards;

  opacity: 0;
}


.btn {
  display: inline-block;

  padding:
    0.85rem 1.75rem;

  border-radius: 8px;

  text-decoration: none;

  font-weight: 600;

  transition:
    transform 0.15s ease,
    background-color 0.15s ease;
}


.btn-primary {
  background: var(--kev-accent);

  color: white;
}


.btn-primary:hover {
  background: #d97706;

  transform: translateY(-2px);
}


.services {
  padding: 5rem 0;
}


.services h2 {
  margin-bottom: 0.5rem;

  text-align: center;

  color: var(--kev-primary);
}


.section-lead {
  margin-bottom: 3rem;

  text-align: center;

  color: var(--kev-muted);
}


.services-grid {
  display: grid;

  grid-template-columns:
    repeat(auto-fit, minmax(260px, 1fr));

  gap: 1.5rem;
}


.service-card {
  padding: 1.75rem;

  background: var(--kev-card);

  border:
    1px solid var(--kev-border);

  border-radius: 12px;

  transition:
    transform 0.2s,
    box-shadow 0.2s;
}


.service-card:hover {
  transform: translateY(-4px);

  box-shadow:
    0 10px 24px rgba(0, 0, 0, 0.08);
}


.service-card h3 {
  margin-bottom: 0.5rem;

  color: var(--kev-primary);
}


.about {
  padding: 5rem 0;

  background: var(--kev-bg);
}


.about-grid {
  display: grid;

  grid-template-columns: 2fr 1fr;

  gap: 3rem;

  align-items: center;
}


.about h2 {
  color: var(--kev-primary);
}


.stats {
  list-style: none;

  padding: 0;

  margin: 0;

  display: grid;

  grid-template-columns:
    repeat(2, 1fr);

  gap: 1rem;
}


.stats li {
  padding: 1.5rem;

  text-align: center;

  background: var(--kev-card);

  border:
    1px solid var(--kev-border);

  border-radius: 12px;
}


.stats strong {
  display: block;

  font-size: 1.75rem;

  color: var(--kev-accent);
}


.stats span {
  color: var(--kev-muted);
}


.contact {
  padding: 5rem 0;
}


.contact h2 {
  text-align: center;

  color: var(--kev-primary);
}


.contact-card {
  max-width: 480px;

  margin: 2rem auto 0;

  padding: 2rem;

  background: var(--kev-card);

  border:
    1px solid var(--kev-border);

  border-radius: 12px;
}


#contact-form {
  display: grid;

  gap: 0.75rem;
}


#contact-form label {
  font-weight: 600;
}


#contact-form input,
#contact-form textarea {
  width: 100%;

  padding:
    0.6rem 0.75rem;

  border:
    1px solid var(--kev-border);

  border-radius: 6px;

  font: inherit;
}


#contact-form input:focus,
#contact-form textarea:focus {
  outline:
    2px solid var(--kev-accent);

  border-color:
    var(--kev-accent);
}


.form-msg {
  min-height: 1.5em;

  font-weight: 600;
}


.site-footer {
  padding: 2rem 0;

  text-align: center;

  background: var(--kev-primary);

  color: white;
}


.updated {
  opacity: 0.85;
}


.theme-btn {
  padding:
    0.4rem 0.9rem;

  border:
    1px solid rgba(255, 255, 255, 0.3);

  border-radius: 6px;

  background: transparent;

  color: white;

  cursor: pointer;

  font: inherit;
}


.theme-btn:hover {
  background:
    rgba(255, 255, 255, 0.1);
}


body.dark {
  background: #0f172a;

  color: #e2e8f0;
}


body.dark .hero,
body.dark .about {
  background: #0b1220;
}


body.dark .service-card,
body.dark .stats li,
body.dark .contact-card {
  background: #1e293b;

  border-color: #334155;

  color: #e2e8f0;
}


body.dark .service-card h3,
body.dark h2,
body.dark .hero h1 {
  color: #fde68a;
}


body.dark #contact-form input,
body.dark #contact-form textarea {
  background: #0f172a;

  color: #e2e8f0;

  border-color: #334155;
}


@keyframes heroFadeIn {

  from {
    opacity: 0;

    transform: translateY(20px);
  }

  to {
    opacity: 1;

    transform: translateY(0);
  }
}


@media (max-width: 720px) {

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

}


@media (max-width: 540px) {

  .nav-links {
    display: none;
  }

  .inner-header {
    gap: 0.5rem;
  }

  .hero {
    padding: 3rem 0;
  }

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

}