/* ===== Reset & Base ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-primary: #f0f6fc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --text-primary: #0c2d48;
  --text-secondary: #547a9a;
  --text-muted: #8ba3b8;
  --accent: #0ea5e9;
  --accent-deep: #0284c7;
  --accent-glow: rgba(14, 165, 233, 0.22);
  --accent-dim: rgba(14, 165, 233, 0.08);
  --border: rgba(12, 45, 72, 0.08);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.25s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ===== Navbar ===== */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background var(--transition), box-shadow var(--transition);
}

#navbar.scrolled {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--border);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--accent);
}

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

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
}

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

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

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: transform var(--transition), opacity var(--transition);
}

/* ===== Hero ===== */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(170deg, #e8f4fd 0%, #ffffff 50%, #f0f6fc 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 50% at 30% 30%, rgba(14, 165, 233, 0.06), transparent 60%),
    radial-gradient(ellipse 50% 50% at 75% 70%, rgba(2, 132, 199, 0.05), transparent 60%);
  pointer-events: none;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(12, 45, 72, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(12, 45, 72, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 60% 60% at 50% 40%, black 25%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 60% 60% at 50% 40%, black 25%, transparent 70%);
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -1px;
  color: var(--text-primary);
}

.hero-title .block {
  display: block;
}

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

.hero-subtitle {
  margin-top: 24px;
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 540px;
  line-height: 1.7;
}

.btn-primary {
  display: inline-block;
  margin-top: 40px;
  padding: 14px 32px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.938rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
}

.btn-primary:hover {
  background: var(--accent-deep);
  box-shadow: 0 4px 24px var(--accent-glow);
  transform: translateY(-1px);
}

/* ===== Sections ===== */
section {
  padding: 100px 0;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 48px;
  position: relative;
  color: var(--text-primary);
}

.section-title::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: var(--accent);
  margin-top: 12px;
  border-radius: 2px;
}

/* ===== About ===== */
#about {
  background: var(--bg-secondary);
}

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

.about-text p {
  color: var(--text-secondary);
  font-size: 1.063rem;
  margin-bottom: 16px;
}

.about-text strong {
  color: var(--text-primary);
}

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

.stat {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.stat:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 16px var(--accent-glow);
}

.stat-number {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  color: var(--accent);
}

.stat-label {
  display: block;
  margin-top: 4px;
  font-size: 0.813rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ===== Technology ===== */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.tech-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.tech-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 24px var(--accent-glow);
  transform: translateY(-2px);
}

.tech-icon {
  width: 48px;
  height: 48px;
  background: var(--accent-dim);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--accent);
}

.tech-icon svg {
  width: 24px;
  height: 24px;
}

.tech-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.tech-card p {
  font-size: 0.938rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Products ===== */
.products-contact-link {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--accent);
  padding: 64px 0;
  text-align: center;
  width: 100%;
  transition: color var(--transition);
}

.products-contact-link:hover {
  color: var(--accent-deep);
}

/* ===== Contact ===== */
#contact {
  background: var(--bg-secondary);
}

.contact-intro {
  color: var(--text-secondary);
  font-size: 1.063rem;
  max-width: 500px;
  margin-bottom: 32px;
}

.contact-card {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.contact-label {
  font-size: 0.813rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.contact-value {
  font-size: 1.063rem;
  font-weight: 500;
  color: var(--text-primary);
}

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

/* ===== Footer ===== */
footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
  background: var(--bg-primary);
}

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

.footer-brand {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.813rem;
  font-weight: 600;
  color: var(--accent);
}

.footer-tagline {
  font-size: 0.813rem;
  color: var(--text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 20px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 4px 24px rgba(12, 45, 72, 0.06);
  }

  .nav-links.active {
    display: flex;
  }

  .mobile-toggle {
    display: flex;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .footer-content {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}