* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", sans-serif;
}

body {
  background: #ffffff;
  color: #1e1e1e;
  line-height: 1.6;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: auto;
}

/* HEADER */
.header {
  background: #0f172a;
  padding: 15px 0;
}

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

.logo {
  height: 45px;
}

nav a {
  color: #e5e7eb;
  margin-left: 20px;
  text-decoration: none;
  font-weight: 500;
}

.btn {
  padding: 10px 18px;
  border-radius: 6px;
  background: #2563eb;
  color: white;
}

.btn-primary {
  display: inline-block;
  margin-top: 20px;
}

/* HERO */
.hero {
  background: linear-gradient(135deg, #0f172a, #1e293b);
  color: white;
  padding: 100px 0;
  text-align: center;
}

.hero h1 {
  font-size: 2.8rem;
  margin-bottom: 20px;
}

/* SECTIONS */
.section {
  padding: 80px 0;
}

.section h2 {
  margin-bottom: 40px;
  font-size: 2.2rem;
  text-align: center;
}

.dark {
  background: #f8fafc;
}

/* GRID */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
}

.card {
  background: white;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.06);
}

.card h3 {
  margin-bottom: 10px;
}

.subtitle {
  color: #2563eb;
  font-weight: 600;
  margin-bottom: 10px;
}

/* CONTACT */
.contact {
  background: #0f172a;
  color: white;
  text-align: center;
}

.contact p {
  margin: 10px 0;
}

/* FOOTER */
.footer {
  background: #020617;
  color: #94a3b8;
  text-align: center;
  padding: 20px 0;
}