/* Reset and base styles */
html {
  font-size: 75%; /* 1rem = 12px if browser default is 16px */
  font-family: 'Nunito Sans', Arial, sans-serif;
  background: var(--background);
  color: var(--text);
  scroll-behavior: smooth;
}
:root {
  --primary-blue: #2563eb;
  --primary-blue-light: #3b82f6;
  --background: #fff;
  --text: #23272f;
  --gray: #f6f7fa;
  --border: #e5e7eb;
  --radius: 0.75rem;
  --shadow: 0 0.25rem 1.5rem rgba(37, 99, 235, 0.08);
  --transition: 0.2s cubic-bezier(.4,0,.2,1);
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  min-height: 100vh;
  background: var(--background);
}

.container {
  width: 90%;
  max-width: 68.75rem;
  margin: 0 auto;
  padding: 2.2rem 0;
}
.site-header {
  background: var(--background);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 0.125rem 0.5rem rgba(37,99,235,0.03);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.188rem 0;
}
.logo {
  font-family: 'Montserrat', Arial, sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-blue);
  letter-spacing: 0.0625rem;
}
nav {
  display: flex;
  gap: 2rem;
}
.nav-link {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition);
  font-size: 1rem;
  align-content: center;
}
.nav-link:hover {
  color: var(--primary-blue);
}
.cta, .hero-cta {
  background: var(--primary-blue);
  color: #fff;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  transition: background var(--transition), color var(--transition);
  margin-left: 1rem;
  font-size: 1.1rem;
}
.cta:hover, .hero-cta:hover {
  background: var(--primary-blue-light);
  color: #fff;
}
.hero {
  text-align: center;
  padding: 4.4rem 0 3.3rem 0;
}
.hero-title {
  font-family: 'Montserrat', Arial, sans-serif;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 1.1rem;
}
.hero-title span {
  color: var(--primary-blue-light);
}
.hero-sub {
  font-size: 1.2rem;
  color: #334155;
  margin-bottom: 2.2rem;
}
.hero-cta {
  display: inline-block;
  background: var(--primary-blue);
  color: #fff;
  padding: 0.8rem 2rem;
  border-radius: var(--radius);
  font-size: 1.1rem;
  font-weight: 600;
  text-decoration: none;
  box-shadow: var(--shadow);
  transition: background var(--transition), box-shadow var(--transition);
}
.hero-cta:hover {
  background: var(--primary-blue-light);
  box-shadow: 0 6px 32px rgba(37,99,235,0.12);
}
.section-title {
  font-family: 'Montserrat', Arial, sans-serif;
  font-size: 2rem;
  color: var(--text);
  margin-bottom: 2.2rem;
  text-align: center;
  font-weight: 600;
}
.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13.75rem, 1fr));
  gap: 2.2rem;
}
.service-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2.2rem 1.2rem;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
  border: 1px solid var(--border);
}
.service-card:hover {
  transform: translateY(-0.375rem) scale(1.03);
  box-shadow: 0 0.5rem 2rem rgba(37,99,235,0.13);
}
.service-card h3 {
  font-family: 'Montserrat', Arial, sans-serif;
  font-size: 1.3rem;
  color: var(--text);
  margin-bottom: 0.77rem;
}
.clients {
  text-align: center;
  padding: 3.3rem 0 2.2rem 0;
}
.client-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2.5rem;
  flex-wrap: wrap;
  margin-top: 1.65rem;
}
.client-logos img {
  /* filter: grayscale(1) brightness(0.8); */
  opacity: 0.8;
  transition: filter var(--transition), opacity var(--transition);
  max-width: 6.25rem;
  max-height: 2.5rem;
}
.client-logos img:hover {
  filter: none;
  opacity: 1;
}
.testimonials {
  background: var(--gray);
  border-radius: var(--radius);
  padding: 2.75rem 1.5rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(17.5rem, 1fr));
  gap: 2.2rem;
  justify-items: center;
  align-items: stretch;
  margin-top: 2.2rem;
  width: 100%;
  max-width: 68.75rem;
}
.testimonial-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2.2rem 1.5rem 1.65rem 1.5rem;
  min-height: 13.75rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  position: relative;
  max-width: 25rem;
  width: 100%;
}
.quote-mark {
  font-size: 2.5rem;
  color: var(--primary-blue-light);
  position: absolute;
  top: 1.32rem;
  left: 1.2rem;
  opacity: 0.15;
  pointer-events: none;
  user-select: none;
}
.testimonial-card blockquote {
  font-size: 1.1rem;
  color: #334155;
  margin: 0 0 1.32rem 0;
  font-style: italic;
  z-index: 1;
}
.testimonial-divider {
  border: none;
  border-top: 0.09375rem solid var(--border);
  width: 2.5rem;
  margin: 0.55rem auto 0.55rem auto;
}
.testimonial-author {
  font-size: 1rem;
  color: var(--primary-blue);
  font-family: 'Montserrat', Arial, sans-serif;
  font-weight: 600;
  margin-top: 0.22rem;
  display: block;
}
.testimonial footer {
  font-size: 0.95rem;
  color: var(--primary-blue);
  margin-top: 0.5rem;
  font-style: italic;
}
.contact {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2.75rem 1.5rem;
  margin: 3.3rem 0;
  max-width: 31.25rem;
  margin-left: auto;
  margin-right: auto;
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.32rem;
}
.contact-form label {
  font-weight: 500;
  color: var(--primary-blue);
  margin-bottom: 0.22rem;
  font-size: 1rem;
}
.contact-form input,
.contact-form textarea {
  padding: 0.77rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  background: var(--gray);
  transition: border var(--transition), box-shadow var(--transition);
  resize: none;
}
.contact-form input:focus,
.contact-form textarea:focus {
  border: 0.09375rem solid var(--primary-blue-light);
  outline: none;
  box-shadow: 0 0 0 0.1375rem #dbeafe;
}
.contact-form button {
  background: var(--primary-blue);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 0.99rem 0;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow);
}
.contact-form button:hover {
  background: var(--primary-blue-light);
  box-shadow: 0 0.375rem 2rem rgba(37,99,235,0.12);
}
.site-footer {
  background: var(--background);
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 1.65rem 0 1.1rem 0;
  color: #64748b;
  font-size: 1rem;
}
.container-main {
  width: 75vw;
  max-width: 75rem;
  min-width: 20rem;
  margin: 0 auto;
}
@media (max-width: 43.75rem) {
  .container {
    width: 98%;
    padding: 1.1rem 0;
  }
  .nav {
    flex-direction: column;
    gap: 1rem;
  }
  .service-grid {
    grid-template-columns: 1fr;
    gap: 1.32rem;
  }
  .client-logos {
    gap: 1.2rem;
  }
  .hero {
    padding: 2.75rem 0 2.2rem 0;
  }
  .testimonials, .contact {
    padding: 1.32rem 0.5rem;
  }
  .testimonial-grid {
    grid-template-columns: 1fr;
    gap: 1.32rem;
  }
  .testimonial-card {
    min-height: 11.25rem;
    padding: 1.32rem 0.7rem 1.1rem 0.7rem;
  }
}