*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #ffffff;
  --bg-alt: #F8FAFC;
  --text: #0F172A;
  --text-muted: #64748B;
  --accent: #2563EB;
  --accent-light: #EFF6FF;
  --border: #E2E8F0;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --max: 1140px;
  --radius: 12px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── NAV ── */
#nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s;
}

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

.nav-cta {
  background: var(--text) !important;
  color: #fff !important;
  padding: 8px 18px;
  border-radius: 8px;
  transition: opacity 0.15s !important;
}

.nav-cta:hover {
  opacity: 0.8;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.2s;
  transform-origin: center;
}

.nav-hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.active span:nth-child(2) { opacity: 0; }
.nav-hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-mobile {
  display: none;
  flex-direction: column;
  border-top: 1px solid var(--border);
  padding: 16px 24px 24px;
  gap: 4px;
}

.nav-mobile.open {
  display: flex;
}

.mobile-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  transition: color 0.15s;
}

.mobile-link:last-child {
  border-bottom: none;
}

.mobile-link:hover {
  color: var(--text);
}

.mobile-cta {
  color: var(--accent) !important;
  font-weight: 600;
}

/* ── HERO ── */
#hero {
  padding: 96px 24px 80px;
  text-align: center;
}

.hero-inner {
  max-width: 720px;
  margin: 0 auto;
}

.hero-tag {
  display: inline-block;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 28px;
}

#hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

#hero h1 span {
  color: var(--accent);
}

#hero > .hero-inner > p {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 540px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── BUTTONS ── */
.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 13px 26px;
  border-radius: 9px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  transition: background 0.15s, transform 0.15s, box-shadow 0.15s;
}

.btn-primary:hover {
  background: #1d4ed8;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
  display: inline-block;
  background: transparent;
  color: var(--text);
  padding: 13px 26px;
  border-radius: 9px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  border: 1.5px solid var(--border);
  transition: border-color 0.15s, transform 0.15s;
}

.btn-secondary:hover {
  border-color: var(--text-muted);
  transform: translateY(-1px);
}

/* ── SHARED SECTION STYLES ── */
section {
  padding: 88px 24px;
}

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

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
  margin-bottom: 14px;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 520px;
  line-height: 1.7;
}

/* ── CLIENTS CAROUSEL ── */
#clients {
  background: var(--accent);
  padding: 52px 0;
}

.clients-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

.clients-label {
  text-align: center;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 32px;
}

.carousel-wrapper {
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent, black 12%, black 88%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 12%, black 88%, transparent);
}

.carousel-track {
  display: flex;
  gap: 48px;
  width: max-content;
  animation: marquee 30s linear infinite;
}

.carousel-track:hover {
  animation-play-state: paused;
}

.carousel-item {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  height: 48px;
}

.carousel-item img {
  height: 40px;
  width: auto;
  max-width: 140px;
  object-fit: contain;
  filter: brightness(0) invert(1);
  opacity: 0.85;
  transition: opacity 0.2s;
}

.carousel-item img:hover {
  opacity: 1;
}

@keyframes marquee {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ── SERVICES ── */
#services {
  background: var(--bg-alt);
}

.services-header {
  margin-bottom: 48px;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.service-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

.service-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
  transform: translateY(-2px);
}

.service-icon {
  width: 44px;
  height: 44px;
  background: var(--accent-light);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: var(--accent);
  flex-shrink: 0;
}

.service-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.service-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ── ABOUT ── */
#about {
  background: var(--bg);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-content h2 {
  font-size: clamp(1.5rem, 2.8vw, 2.1rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.25;
  margin-bottom: 20px;
}

.about-content p {
  font-size: 0.975rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 16px;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.stat {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
}

.stat-number {
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ── CONTACT ── */
#contact {
  background: var(--bg-alt);
  text-align: center;
}

.contact-inner {
  max-width: 580px;
  margin: 0 auto;
}

#contact .section-label {
  display: block;
  margin-bottom: 10px;
}

#contact h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 16px;
}

#contact p {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 36px;
}

.contact-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── FOOTER ── */
footer {
  border-top: 1px solid var(--border);
  padding: 28px 24px;
  text-align: center;
}

footer p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

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

  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }

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

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

  section {
    padding: 64px 20px;
  }

  #hero {
    padding: 72px 20px 60px;
  }
}