/* Base */
body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, Ubuntu, sans-serif;
  background: #0f172a;
  color: #e5e7eb;
}

/* Hero */
.hero {
  background: #020617;
  padding: 60px 20px;
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 10px;
}

.hero p {
  font-size: 1.2rem;
  color: #94a3b8;
}

/* Buttons */
.btn {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 24px;
  background: #22c55e;
  color: #022c22;
  text-decoration: none;
  border-radius: 6px;
  font-weight: bold;
}

/* Sections */
.section {
  padding: 60px 20px;
  max-width: 1100px;
  margin: auto;
}

.section h2 {
  text-align: center;
  margin-bottom: 40px;
  font-size: 2rem;
}

/* Features */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 30px;
  text-align: center;
}

.feature p {
  color: #94a3b8;
}

/* Courses */
.courses {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.card {
  background: #020617;
  border-radius: 10px;
  padding: 25px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.card p {
  color: #94a3b8;
}

/* Text helpers */
.center-text {
  text-align: center;
  max-width: 700px;
  margin: auto;
  color: #94a3b8;
}

/* Footer */
.footer {
  background: #020617;
  padding: 30px;
  text-align: center;
  color: #64748b;
  font-size: 0.9rem;
}