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

:root {
  --primary: #4f46e5;
  --primary-dark: #3730a3;
  --primary-light: #818cf8;
  --bg: #fafafa;
  --surface: #ffffff;
  --text: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --gradient-start: #4f46e5;
  --gradient-end: #7c3aed;
  --radius: 12px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    'Helvetica Neue', Arial, sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--primary-dark);
}

/* ─── Header ─── */
header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.9);
}

header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.logo {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

header nav {
  display: flex;
  gap: 28px;
}

header nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition);
}

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

/* ─── Hero ─── */
.hero {
  padding: 100px 0 80px;
  text-align: center;
  background: linear-gradient(135deg, #f0edff 0%, #ede9fe 50%, #e8e4fd 100%);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.08);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -120px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -80px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

.hero h1 {
  font-size: 48px;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--text);
  position: relative;
}

.tagline {
  margin-top: 16px;
  font-size: 20px;
  font-weight: 400;
  color: var(--text-secondary);
  position: relative;
}

/* ─── Sections ─── */
section {
  padding: 80px 0;
}

section h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

section .subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 540px;
}

section p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ─── Products ─── */
.products {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.product-grid {
  display: grid;
  gap: 24px;
}

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

.product-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.product-card .badge {
  display: inline-block;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(79, 70, 229, 0.08);
  border-radius: 20px;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.product-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.product-card p {
  margin-bottom: 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  border-radius: 8px;
  text-decoration: none;
  transition: opacity var(--transition), transform var(--transition);
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.25);
}

.btn:hover {
  opacity: 0.92;
  transform: translateY(-1px);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
  box-shadow: none;
}

.btn-outline:hover {
  background: rgba(79, 70, 229, 0.05);
  color: var(--primary);
  opacity: 1;
}

/* ─── About ─── */
.about {
  background: var(--bg);
}

.about p {
  max-width: 640px;
  font-size: 16px;
  line-height: 1.8;
}

/* ─── Contact ─── */
.contact {
  background: var(--surface);
  border-top: 1px solid var(--border);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.contact-item {
  padding: 24px;
  background: var(--bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.contact-item h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.contact-item p {
  font-size: 15px;
  color: var(--text);
  line-height: 1.7;
}

.contact-item a {
  color: var(--primary);
}

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

footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

footer p {
  font-size: 13px;
  color: var(--text-muted);
}

footer nav {
  display: flex;
  gap: 24px;
}

footer nav a {
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition);
}

footer nav a:hover {
  color: var(--text-secondary);
}

/* ─── Responsive ─── */
@media (max-width: 640px) {
  .hero {
    padding: 64px 0 56px;
  }

  .hero h1 {
    font-size: 32px;
  }

  .tagline {
    font-size: 17px;
  }

  section {
    padding: 56px 0;
  }

  section h2 {
    font-size: 24px;
  }

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

  header nav {
    gap: 16px;
  }
}