:root {
  --bg-dark: #0b1020;
  --bg-light: #f8fafc;
  --accent: #3b82f6;
  --accent-2: #22d3ee;
  --text-dark: #0f172a;
  --text-light: #e5e7eb;
  --card-bg: #ffffff;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, sans-serif;
  color: #1a1a1a;
  line-height: 1.6;
}

header {
  padding: 90px 20px;
  background:
    radial-gradient(800px circle at top, rgba(34,211,238,0.25), transparent 60%),
    linear-gradient(135deg, #0b1020, #111827);
  color: var(--text-light);
  text-align: center;
}

header h1 {
  font-size: clamp(32px, 5vw, 48px);
  margin-bottom: 20px;
}

header p {
  max-width: 720px;
  margin: 0 auto;
  font-size: 18px;
  color: #c7d2fe;
}

section {
  padding: 50px 20px;
  max-width: 900px;
  margin: auto;
}

h1, h2 {
  line-height: 1.2;
}

.btn {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 24px;
  background: #2563eb;
  color: white;
  text-decoration: none;
  border-radius: 4px;
}

footer {
  padding: 20px;
  text-align: center;
  background: #f3f4f6;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 30px;
  padding: 14px 28px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
  text-decoration: none;
  border-radius: 10px;
  font-weight: 600;
  box-shadow: 0 10px 30px rgba(59,130,246,.35);
  transition: transform .2s ease, box-shadow .2s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 40px rgba(59,130,246,.45);
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.card {
  background: var(--card-bg);
  padding: 30px;
  border-radius: 16px;
  box-shadow: 0 20px 40px rgba(2,6,23,.08);
  transition: transform .2s ease, box-shadow .2s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 30px 60px rgba(2,6,23,.12);
}

.card h3 {
  margin-top: 0;
  color: var(--text-dark);
}


.tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.tech-list span {
  padding: 8px 14px;
  background: linear-gradient(135deg, #eef2ff, #ecfeff);
  border-radius: 999px;
  font-size: 14px;
  color: #1e3a8a;
}

section {
  animation: fadeUp .6s ease both;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}