:root {
  --dark: #0f172a;
  --blue: #0ea5e9;
  --light: #f8fafc;
  --gray: #64748b;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', sans-serif;
}

body {
  background: var(--light);
  color: var(--dark);
  line-height: 1.6;
  margin: 0;
}

nav {
  background: white;
  padding: 1rem 8%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
  position: sticky;
  top: 0;
  height: 70px;
  z-index: 1000;
}

nav a {
  text-decoration: none;
  color: var(--dark);
  margin-left: 1.5rem;
  font-weight: 500;
}

nav a:hover {
  color: var(--blue);
}

header {
  padding: 6rem 8%;
  background: linear-gradient(rgba(15,23,42,0.7), rgba(15,23,42,0.7)),
              url("https://images.unsplash.com/photo-1508615070457-7baeba4003ab") center/cover;
  color: white;
}

header h1 {
  font-size: 2.8rem;
  margin-bottom: 1rem;
}

header p {
  max-width: 600px;
  color: #e5e7eb;
}

section {
  padding: 5rem 8%;
}

.section-title {
  font-size: 2rem;
  margin-bottom: 3rem;
  text-align: center;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.card {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.card h3 {
  margin-bottom: 1rem;
}

.card p {
  color: var(--gray);
}

.card ul {
  margin-top: 1rem;
  padding-left: 1.2rem;
}

.card li {
  margin-bottom: 0.5rem;
  color: var(--gray);
}

footer {
  background: var(--dark);
  color: white;
  padding: 2rem 8%;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.footer-content span {
  color: #e5e7eb;
}

.footer-bottom {
  text-align: center;
  font-size: 0.85rem;
  color: #cbd5f5;
}

footer a {
  color: inherit;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 3rem;
}

.hero-text {
  max-width: 600px;
}

.hero-image img {
  border-radius: 50%;
  width: 280px;
  max-width: 100%;
  filter: drop-shadow(0 10px 20px rgba(0,0,0,0.3));
}

/* Responsive mobile */
@media (max-width: 768px) {
  .hero {
    flex-direction: column;
    text-align: center;
  }

  .hero-image img {
    width: 220px;
  }
}