:root {
  --black: #0a0a0a;
  --white: #ffffff;
  --grey: #6b6b6b;
  --light-grey: #f4f4f4;
  --border: #e2e2e2;
  --max-width: 1100px;
}

* { box-sizing: border-box; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

html { scroll-behavior: smooth; }

html, body { overflow-x: hidden; max-width: 100%; }

body {
  margin: 0;
  font-family: 'Jost', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  color: var(--black);
  background: var(--white);
  line-height: 1.6;
}

a { color: inherit; }

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

/* HERO */
.hero {
  position: relative;
  background: var(--black);
  color: var(--white);
  min-height: 420px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-arcs {
  position: absolute;
  right: -6%;
  bottom: -50%;
  width: 32%;
  max-width: 620px;
  opacity: 0.45;
  pointer-events: none;
}

@media (max-width: 760px) {
  .hero-arcs { width: 55%; bottom: -41%; opacity: 0.3; }
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: 100%;
  text-align: center;
  padding: 64px 32px;
}

.hero h1 { margin: 0; }

.hero-logo {
  width: min(90%, 480px);
  height: auto;
  display: block;
  margin: 0 auto;
}

.hero p.tagline {
  max-width: 560px;
  margin: 40px auto 0;
  font-size: 18px;
  color: rgba(255,255,255,0.85);
}

.hero .cta {
  display: inline-block;
  margin-top: 40px;
  padding: 14px 34px;
  border: 1px solid var(--white);
  color: var(--white);
  text-decoration: none;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-size: 13px;
  transition: background 0.2s ease, color 0.2s ease;
}

.hero .cta:hover {
  background: var(--white);
  color: var(--black);
}

/* SECTIONS */
section { padding: 100px 0; }

.section-label {
  font-size: 13px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--grey);
  margin-bottom: 16px;
}

h2 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin: 0 0 32px;
}

.about-text h2 {
  margin-top: -12px;
}

/* ABOUT */
.about-section {
  padding-bottom: 0;
}

.about {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 64px;
  align-items: start;
}

.about img {
  width: 100%;
  border-radius: 4px;
  filter: grayscale(100%);
}

.about-text p {
  font-size: 17px;
  color: #333;
  margin: 0 0 18px;
}

.expertise-section {
  padding-top: 56px;
}

.expertise-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.expertise-card {
  background: var(--white);
  padding: 32px;
}

.expertise-card h3 {
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
  margin: 0 0 12px;
}

.expertise-card p {
  font-size: 15px;
  color: var(--grey);
  margin: 0;
}

/* CONTACT */
.contact {
  background: var(--light-grey);
}

.contact-columns {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 64px;
  margin-top: 48px;
}

.contact-col p {
  margin: 0 0 10px;
  font-size: 16px;
}

.contact-col .label {
  color: var(--grey);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 24px;
}

.contact-col .label:first-child { margin-top: 0; }

/* FOOTER */
footer {
  background: var(--black);
  color: rgba(255,255,255,0.7);
  padding: 40px 0;
  text-align: center;
  font-size: 13px;
}

footer a { text-decoration: none; color: rgba(255,255,255,0.7); }
footer a:hover { color: var(--white); }

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

@media (max-width: 760px) {
  .about { grid-template-columns: 1fr; }
  .about img { max-width: 260px; }
  .expertise-grid { grid-template-columns: 1fr; }
  .contact-columns { grid-template-columns: 1fr; }

  .hero-inner { padding: 56px 20px; }
  .hero-logo { width: 85%; }
  .hero p.tagline { font-size: 15px; }
}