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

:root {
  --bg: #0B0B0B;
  --bg2: #141414;
  --text: #F0F0EE;
  --muted: #777;
  --accent: #B8FF5A;
  --border: rgba(255, 255, 255, 0.07);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ---- Layout ---- */

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ---- Nav ---- */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.5rem 2rem;
  transition: background 0.4s, border-color 0.4s;
}

.nav.scrolled {
  background: rgba(11, 11, 11, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text);
  text-decoration: none;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 2.5rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.8125rem;
  letter-spacing: 0.03em;
  transition: color 0.2s;
}

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

/* ---- Hero ---- */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 2rem 6rem;
  position: relative;
  overflow: hidden;
}

.hero-bg-circle {
  position: absolute;
  top: 40%;
  right: -15%;
  width: 700px;
  height: 700px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(184, 255, 90, 0.07) 0%, transparent 65%);
  pointer-events: none;
  transform: translateY(-50%);
}

.hero-content {
  max-width: 1080px;
  margin: 0 auto;
  width: 100%;
  position: relative;
  z-index: 1;
}

.hero-label {
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 1.75rem;
}

.hero-title {
  font-size: clamp(3rem, 8vw, 6.5rem);
  font-weight: 600;
  line-height: 1.04;
  letter-spacing: -0.025em;
  margin-bottom: 1.75rem;
}

.hero-accent {
  color: var(--accent);
}

.hero-sub {
  font-size: 0.9375rem;
  color: var(--muted);
  margin-bottom: 2.75rem;
  line-height: 2;
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: #0B0B0B;
  padding: 0.875rem 2.25rem;
  border-radius: 100px;
  font-weight: 600;
  font-size: 0.8125rem;
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: transform 0.25s, opacity 0.25s;
}

.btn:hover {
  transform: translateY(-3px);
  opacity: 0.88;
}

/* ---- Section common ---- */

.section-label {
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 400;
  margin-bottom: 3rem;
}

/* ---- Services ---- */

.services {
  padding: 8rem 0;
  border-top: 1px solid var(--border);
}

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

.service-card {
  background: var(--bg);
  padding: 2.5rem 2rem;
  transition: background 0.25s;
}

.service-card:hover {
  background: var(--bg2);
}

.service-num {
  display: block;
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 1.25rem;
}

.service-card h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 0.875rem;
}

.service-card p {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.85;
}

/* ---- About ---- */

.about {
  padding: 8rem 0;
  border-top: 1px solid var(--border);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.about-lead {
  font-size: 1.375rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin-bottom: 1.25rem;
  line-height: 1.4;
}

.about-text p:last-child {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.9;
}

.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-top: 0.25rem;
}

.tag {
  border: 1px solid var(--border);
  padding: 0.375rem 1rem;
  border-radius: 100px;
  font-size: 0.8125rem;
  color: var(--muted);
  letter-spacing: 0.02em;
  transition: border-color 0.2s, color 0.2s;
}

.tag:hover {
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--text);
}

/* ---- Contact ---- */

.contact {
  padding: 8rem 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

.contact-lead {
  font-size: 0.9375rem;
  color: var(--muted);
  margin-bottom: 2.25rem;
}

.contact-email {
  display: inline-block;
  font-size: clamp(1.25rem, 3.5vw, 2.25rem);
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
  position: relative;
  transition: color 0.2s;
}

.contact-email::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0.4);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.contact-email:hover {
  color: var(--accent);
}

.contact-email:hover::after {
  transform: scaleX(1);
}

/* ---- Footer ---- */

.footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
}

.footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.footer-copy {
  font-size: 0.8125rem;
  color: var(--muted);
  letter-spacing: 0.02em;
}

/* ---- Fade-in animation ---- */

.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Responsive ---- */

@media (max-width: 768px) {
  .nav-links {
    gap: 1.5rem;
  }

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

  .about-content {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .footer .container {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }

  .hero-sub br {
    display: none;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 7rem 1.5rem 5rem;
  }

  .container {
    padding: 0 1.5rem;
  }

  .services,
  .about,
  .contact {
    padding: 5rem 0;
  }
}