* {
  box-sizing: border-box;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #f4f7f6;
  color: #333;
  line-height: 1.6;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 5%;
  background: #1e293b;
}

.navbar .logo {
  color: #fff;
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 1px;
}

.navbar nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.navbar nav a {
  color: #cbd5e1;
  text-decoration: none;
  transition: color 0.3s;
}

.navbar nav a:hover,
.navbar nav a.active {
  color: #38bdf8;
}

.hero {
  padding: 5rem 1rem;
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  color: #fff;
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  margin-bottom: 1rem;
  font-size: clamp(2rem, 6vw, 2.5rem);
}

.hero p {
  margin-bottom: 2rem;
  color: #cbd5e1;
  font-size: 1.1rem;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.hero-buttons .btn-primary,
.hero-buttons .btn-secondary {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border: 1px solid transparent;
  border-radius: 6px;
  font-weight: 600;
  text-decoration: none;
}

.btn-primary {
  background: #0284c7;
  color: #fff;
}

.btn-primary:hover {
  background: #0369a1;
}

.btn-secondary {
  border-color: #94a3b8 !important;
  color: #fff;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
}

.section {
  padding: 4rem 5%;
  text-align: center;
}

.section h2 {
  margin-bottom: 2rem;
  color: #0f172a;
  font-size: 2rem;
}

.profile-section {
  background: #fff;
}

.profile-copy {
  max-width: 760px;
  margin: 0 auto;
  color: #64748b;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(250px, 100%), 1fr));
  gap: 1.5rem;
}

.card {
  padding: 2rem;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  text-align: left;
}

.card h3 {
  margin-bottom: 0.5rem;
  color: #0284c7;
}

footer {
  padding: 1.5rem;
  background: #1e293b;
  color: #94a3b8;
  font-size: 0.85rem;
  text-align: center;
}

footer p {
  margin: 0;
}

@media (max-width: 520px) {
  .navbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .navbar nav {
    gap: 0.5rem 1rem;
  }

  .hero {
    padding: 4rem 1rem;
  }
}