:root {
  --black: #000000;
  --white: #ffffff;
  --gray-100: #f5f5f5;
  --gray-200: #e5e5e5;
  --gray-400: #a3a3a3;
  --gray-600: #555555;
  --font-sans: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  --max-width: 1080px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--white);
  color: var(--black);
  line-height: 1.65;
}

a {
  color: inherit;
}

/* Header */
.site-header {
  background: var(--black);
  color: var(--white);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--white);
  white-space: nowrap;
}

.nav-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.5rem;
}

.nav-links a {
  color: var(--gray-400);
  text-decoration: none;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: color 0.15s;
}

.nav-links a:hover {
  color: var(--white);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 1px solid var(--gray-600);
  padding: 8px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
}

/* Hero */
.hero {
  background: var(--black);
  color: var(--white);
  text-align: center;
  padding: 6rem 1.5rem 5.5rem;
}

.hero-label {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.7rem;
  color: var(--gray-400);
  margin: 0 0 1.5rem;
}

.hero h1 {
  font-size: clamp(2rem, 5.5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.12;
  max-width: 46rem;
  margin: 0 auto 1.5rem;
  letter-spacing: -0.02em;
}

.hero-lead {
  font-size: 1.0625rem;
  color: var(--gray-200);
  max-width: 38rem;
  margin: 0 auto 2.5rem;
}

/* Sections */
.section {
  padding: 4.5rem 1.5rem;
  scroll-margin-top: 4.5rem;
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-alt {
  background: var(--gray-100);
}

.section h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin: 0 0 1.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  position: relative;
  padding-bottom: 0.875rem;
}

.section h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 3rem;
  height: 3px;
  background: var(--black);
}

.section-lead {
  font-size: 1.0625rem;
  max-width: 46rem;
  margin: 0 0 2rem;
  color: var(--gray-600);
}

.section-intro {
  color: var(--gray-600);
  margin: -0.75rem 0 1.75rem;
  max-width: 40rem;
}

/* About */
.dual-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.card {
  border: 1px solid var(--black);
  padding: 1.75rem;
  background: var(--white);
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 0.875rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.card p {
  margin: 0;
  color: var(--gray-600);
}

.values-line {
  margin: 2rem 0 0;
  text-align: center;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray-600);
}

/* Services */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.25rem;
}

.service-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  padding: 1.5rem 1.5rem 1.25rem;
  transition: border-color 0.15s;
}

.service-card:hover {
  border-color: var(--black);
}

.service-card h3 {
  margin: 0 0 0.875rem;
  font-size: 0.9375rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.service-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.service-card li {
  font-size: 0.875rem;
  color: var(--gray-600);
  padding: 0.3rem 0 0.3rem 1.125rem;
  position: relative;
}

.service-card li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--black);
  font-weight: 700;
}

.service-card--highlight {
  background: var(--black);
  border-color: var(--black);
  color: var(--white);
}

.service-card--highlight h3 {
  color: var(--white);
}

.service-card--highlight li {
  color: var(--gray-200);
}

.service-card--highlight li::before {
  color: var(--white);
}

/* Industries */
.industries-line {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 2.1;
  color: var(--gray-600);
  max-width: 56rem;
}

/* Products */
.product-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 0.75rem;
}

.product-grid li {
  border: 1px solid var(--black);
  padding: 1rem 0.75rem;
  font-weight: 700;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-align: center;
  background: var(--white);
  transition: background 0.15s, color 0.15s;
}

.product-grid li:hover {
  background: var(--black);
  color: var(--white);
}

/* Technology stack */
.stack-list {
  margin: 0;
}

.stack-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 1rem;
  padding: 0.875rem 0;
  border-bottom: 1px solid var(--gray-200);
}

.stack-row:last-child {
  border-bottom: none;
}

.stack-row dt {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding-top: 0.125rem;
}

.stack-row dd {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--gray-600);
}

/* Partners */
.partner-featured {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.partner-card {
  background: var(--black);
  color: var(--white);
  padding: 1.75rem;
}

.partner-card h3 {
  margin: 0 0 0.625rem;
  font-size: 1rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.partner-card p {
  margin: 0;
  color: var(--gray-400);
  font-size: 0.9375rem;
}

.partner-note {
  margin: 1.75rem 0 0;
  font-size: 0.875rem;
  color: var(--gray-600);
  max-width: 48rem;
}

/* Process */
.process-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1.25rem;
}

.process-steps li {
  font-size: 0.875rem;
  font-weight: 600;
  border-top: 3px solid var(--black);
  padding-top: 0.875rem;
}

.process-steps span {
  display: block;
  font-size: 1.375rem;
  font-weight: 800;
  margin-bottom: 0.25rem;
}

/* Why / Commitment */
.section-commitment {
  background: var(--black);
  color: var(--white);
}

.section-commitment h2 {
  color: var(--white);
}

.section-commitment h2::after {
  background: var(--white);
}

.why-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem 2.5rem;
}

.why-list li {
  color: var(--gray-200);
  font-size: 0.9375rem;
  padding-left: 1.25rem;
  position: relative;
}

.why-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--white);
  font-weight: 700;
}

.motto {
  margin: 3rem 0 0;
  font-size: 1.25rem;
  font-weight: 800;
  text-align: center;
  letter-spacing: 0.02em;
}

/* Contact */
.section-contact {
  text-align: center;
}

.section-contact h2 {
  padding-bottom: 0;
}

.section-contact h2::after {
  display: none;
}

.section-contact p {
  color: var(--gray-600);
  max-width: 32rem;
  margin: 0 auto 2rem;
}

.contact-location {
  margin-top: 1.5rem !important;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.9rem 2.25rem;
  font-weight: 700;
  font-size: 0.8125rem;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: background 0.15s, color 0.15s;
}

.btn-hero {
  background: var(--white);
  color: var(--black);
  border: 1px solid var(--white);
}

.btn-hero:hover {
  background: transparent;
  color: var(--white);
}

.btn-contact {
  background: var(--black);
  color: var(--white);
  border: 1px solid var(--black);
  text-transform: none;
  letter-spacing: 0.02em;
}

.btn-contact:hover {
  background: var(--white);
  color: var(--black);
}

/* Footer */
.site-footer {
  background: var(--black);
  color: var(--gray-600);
  text-align: center;
  padding: 2.5rem 1.5rem;
  font-size: 0.8125rem;
  border-top: 1px solid #1a1a1a;
}

.footer-motto {
  color: var(--gray-400);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.6875rem;
  margin: 0 0 0.625rem;
}

.site-footer p:last-child {
  margin: 0;
}

/* Mobile */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--black);
    flex-direction: column;
    padding: 1rem 1.5rem 1.5rem;
    border-bottom: 1px solid var(--gray-600);
    gap: 0.875rem;
  }

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

  .nav {
    position: relative;
  }

  .hero {
    padding: 4rem 1.25rem 3.5rem;
  }

  .section {
    padding: 3rem 1.25rem;
  }

  .stack-row {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
}