/* Global style tokens for easy future customization */
:root {
  --slate-900: #0f172a;
  --slate-800: #1e293b;
  --slate-700: #334155;
  --neutral-100: #f8fafc;
  --neutral-300: #cbd5e1;
  --neutral-900: #0b1220;
  --accent: #06b6d4;
}

/* Enable smooth in-page anchor scrolling */
html {
  scroll-behavior: smooth;
}

/* Core page defaults */
body {
  margin: 0;
  font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--neutral-100);
  color: var(--neutral-900);
  line-height: 1.6;
}

/* Reusable max-width container */
.container {
  width: min(1100px, 92%);
  margin: 0 auto;
}

/* Sticky header and nav styles */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--slate-900);
  border-bottom: 1px solid var(--slate-700);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4rem;
}

.brand {
  color: white;
  text-decoration: none;
  font-weight: 700;
}

.site-nav ul {
  list-style: none;
  display: flex;
  gap: 1rem;
  margin: 0;
  padding: 0;
}

.site-nav a {
  color: var(--neutral-300);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--accent);
}

/* Hidden by default; shown at mobile widths */
.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--neutral-300);
  color: white;
  font-size: 1.1rem;
  border-radius: 0.4rem;
  padding: 0.35rem 0.6rem;
}

/* Hero uses flexbox for easy vertical alignment */
.hero {
  background: linear-gradient(130deg, var(--slate-900), var(--slate-800));
  color: white;
  padding: 5rem 0 4rem;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 700px;
}

.hero h1 {
  margin: 0;
  line-height: 1.2;
  font-size: clamp(1.8rem, 3vw, 2.8rem);
}

.cta-button {
  display: inline-block;
  width: fit-content;
  background: var(--accent);
  color: var(--slate-900);
  text-decoration: none;
  font-weight: 700;
  border-radius: 0.45rem;
  padding: 0.75rem 1.1rem;
}

.cta-button:hover,
.cta-button:focus-visible {
  filter: brightness(1.08);
}

/* Generic section spacing */
.section {
  padding: 3.5rem 0;
}

.section-alt {
  background: white;
}

.section h2 {
  margin-top: 0;
}

/* Services and testimonials use CSS Grid */
.services-grid,
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.service-card,
.testimonial {
  background: white;
  border: 1px solid var(--neutral-300);
  border-radius: 0.55rem;
  padding: 1rem;
}

.testimonial {
  margin: 0;
}

.testimonial cite {
  display: block;
  margin-top: 0.75rem;
  font-style: normal;
  color: var(--slate-700);
}

/* Functional, minimalist form layout */
.contact-form {
  display: grid;
  gap: 0.75rem;
  max-width: 640px;
}

.contact-form input,
.contact-form textarea,
.contact-form button {
  font: inherit;
}

.contact-form input,
.contact-form textarea {
  border: 1px solid var(--neutral-300);
  border-radius: 0.45rem;
  padding: 0.65rem;
}

.contact-form button {
  width: fit-content;
  border: none;
  border-radius: 0.45rem;
  background: var(--slate-900);
  color: white;
  font-weight: 600;
  padding: 0.7rem 1rem;
  cursor: pointer;
}

.contact-form button:hover,
.contact-form button:focus-visible {
  background: var(--accent);
  color: var(--slate-900);
}

/* Footer details */
.site-footer {
  background: var(--slate-900);
  color: var(--neutral-300);
  padding: 1.5rem 0;
}

.footer-content p {
  margin: 0.35rem 0;
}

.footer-details {
  margin: 0;
  display: grid;
  gap: 0.2rem 0.75rem;
  grid-template-columns: auto 1fr;
}

.footer-details dt {
  font-weight: 700;
  color: white;
}

.footer-details dd {
  margin: 0;
}

.footer-details a {
  color: var(--neutral-300);
}

.footer-details a:hover,
.footer-details a:focus-visible {
  color: var(--accent);
}

/* Tablet breakpoint */
@media (max-width: 900px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

/* Mobile navigation + single-column content */
@media (max-width: 700px) {
  .menu-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 4rem;
    left: 0;
    right: 0;
    background: var(--slate-900);
    border-bottom: 1px solid var(--slate-700);
    display: none;
  }

  .site-nav.open {
    display: block;
  }

  .site-nav ul {
    flex-direction: column;
    padding: 0.75rem 1rem 1rem;
  }

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