/* RESET */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
  color: #0f172a;
}

/* HEADER */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 40px;
  background: #0f172a;
  color: white;
}

.logo {
  font-size: 24px;
  font-weight: bold;
}

.nav a {
  color: white;
  margin-right: 16px;
  text-decoration: none;
  font-size: 16px;
}

.nav a:hover {
  text-decoration: underline;
}

/* BUTTONS */
.btn {
  background: #2563eb;
  color: white;
  border: none;
  padding: 10px 16px;
  border-radius: 6px;
  cursor: pointer;
}

.btn-primary {
  background: #2563eb;
  color: white;
  border: none;
  padding: 12px 20px;
  border-radius: 8px;
  cursor: pointer;
  margin-top: 20px;
}

/* HERO */
.hero {
  text-align: center;
  padding: 80px 20px;
  background: #f1f5f9;
}

.hero h1 {
  font-size: 36px;
}

.hero p {
  margin-top: 12px;
  font-size: 18px;
}

/* FEATURES */
.features {
  padding: 60px 20px;
  text-align: center;
}

.feature-grid {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 30px;
}

.card {
  border: 1px solid #cbd5f5;
  padding: 20px;
  width: 220px;
  border-radius: 8px;
  background: white;
}

/* TESTIMONIALS */
.testimonials {
  background: #f8fafc;
  padding: 60px 20px;
  text-align: center;
  font-style: italic;
}

/* FOOTER */
.footer {
  background: #0f172a;
  color: white;
  text-align: center;
  padding: 16px;
  margin-top: 40px;
}

/* MOBILE RESPONSIVE */
@media (max-width: 768px) {
  .header {
    flex-direction: column;
    gap: 10px;
  }

  .feature-grid {
    flex-direction: column;
    align-items: center;
  }

  .hero h1 {
    font-size: 28px;
  }
}

.btn, .btn-primary {
  text-decoration: none;
  display: inline-block;
}