* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: system-ui, sans-serif;
  background: #f9fafb;
}
.nav {
  background: white;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 16px;
  height: 64px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  font-size: 24px;
  font-weight: bold;
  color: #d4af37;
}
.nav-links a {
  margin-left: 20px;
  text-decoration: none;
  color: #4b5563;
  font-weight: 500;
}
.nav-links a.active {
  color: #ec4899;
}
.hero {
  background: linear-gradient(135deg, #f9a8d4, #ec4899);
  padding: 60px 20px;
  text-align: center;
  color: white;
}
.hero h1 {
  font-size: 36px;
  margin-bottom: 16px;
}
.hero p {
  font-size: 18px;
  margin-bottom: 24px;
}
.btn {
  background: white;
  color: #ec4899;
  padding: 12px 24px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: bold;
}
.container {
  max-width: 1280px;
  margin: 60px auto;
  padding: 0 20px;
}
.title {
  font-size: 28px;
  text-align: center;
  margin-bottom: 40px;
}
.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
@media (min-width: 768px) {
  .grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.card {
  background: white;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.05);
  padding: 20px;
}
.card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}
.card p {
  color: #6b7280;
  font-size: 14px;
}
.profile-box {
  background: white;
  max-width: 500px;
  margin: 0 auto;
  padding: 30px;
  border-radius: 16px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}
.form-group {
  margin-bottom: 16px;
}
.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
}
.form-group select {
  width: 100%;
  padding: 12px;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
}
#skin-result {
  font-size: 20px;
  font-weight: bold;
  color: #ec4899;
  margin: 16px 0;
}