body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: #f8fafc;
  color: #1e293b;
}

/* Layout */
.container {
  max-width: 1100px;
  margin: auto;
  padding: 20px;
}

.narrow {
  max-width: 700px;
}

.center {
  text-align: center;
}

/* Hero */
.hero {
  background: linear-gradient(to right, #0f172a, #1e293b);
  color: white;
  text-align: center;
  padding: 100px 20px;
}

.hero h1 {
  font-size: 2.8rem;
}

.hero h2 {
  font-weight: 400;
  margin: 10px 0;
}

.subtext {
  max-width: 600px;
  margin: 15px auto;
  color: #cbd5f5;
}

.meta {
  margin-top: 15px;
  font-size: 0.9rem;
  color: #94a3b8;
}

/* Buttons */
.btn {
  display: inline-block;
  margin: 10px;
  padding: 10px 22px;
  border-radius: 6px;
  text-decoration: none;
}

.primary {
  background: #2563eb;
  color: white;
}

.secondary {
  border: 1px solid #cbd5f5;
  color: white;
}

/* Nav */
.nav {
  display: flex;
  justify-content: center;
  gap: 20px;
  background: white;
  padding: 15px;
  border-bottom: 1px solid #e2e8f0;
  position: sticky;
  top: 0;
}

.nav a {
  text-decoration: none;
  color: #334155;
}

/* Sections */
.section {
  padding: 70px 20px;
}

.section.light {
  background: #f1f5f9;
}

h2 {
  margin-bottom: 20px;
}

/* Grid */
.grid {
  display: grid;
  gap: 15px;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.card {
  background: white;
  padding: 20px;
  border-radius: 8px;
  border: 1px solid #e2e8f0;
}

.pill {
  background: white;
  padding: 10px;
  border-radius: 20px;
  text-align: center;
  border: 1px solid #e2e8f0;
}

/* Timeline */
.item {
  margin-bottom: 25px;
}

.item span {
  font-size: 0.85rem;
  color: #64748b;
}

/* Certifications */
.highlight {
  margin-bottom: 15px;
  color: #475569;
}

.cert-list li {
  margin: 8px 0;
}

/* Footer */
footer {
  text-align: center;
  padding: 20px;
  color: #64748b;
}