* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', 'Malgun Gothic', sans-serif;
  background: #f0f4ff;
  color: #1a1a2e;
  min-height: 100vh;
}

nav {
  background: #16213e;
  padding: 1rem 2rem;
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

nav .logo {
  color: #e2e8f0;
  font-weight: 700;
  font-size: 1.1rem;
  margin-right: auto;
}

nav a.btn {
  color: #a0aec0;
  background: transparent;
  text-decoration: none;
  padding: 0.45rem 1rem;
  border-radius: 6px;
  font-size: 0.9rem;
  transition: all 0.2s;
  border: 1px solid transparent;
}

nav a.btn:hover,
nav a.btn.active {
  color: #fff;
  background: #0f3460;
  border-color: #4a5568;
}

main {
  max-width: 720px;
  margin: 3rem auto;
  padding: 0 1.5rem;
}

h1 {
  font-size: 2.8rem;
  margin-bottom: 0.5rem;
  color: #16213e;
}

.subtitle {
  color: #718096;
  font-size: 1.05rem;
  margin-bottom: 2rem;
}

.card {
  background: #fff;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  margin-bottom: 1.5rem;
}

.card h2 {
  font-size: 1.3rem;
  margin-bottom: 0.75rem;
  color: #16213e;
}

.card p {
  color: #4a5568;
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.card p:last-child {
  margin-bottom: 0;
}

.button-group {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1.25rem;
}

.btn {
  display: inline-block;
  padding: 0.6rem 1.4rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
  border: none;
}

.btn.primary {
  background: #0f3460;
  color: #fff;
}

.btn.primary:hover {
  background: #16213e;
}

.btn.secondary {
  background: #e2e8f0;
  color: #2d3748;
}

.btn.secondary:hover {
  background: #cbd5e0;
}

.btn.outline {
  background: transparent;
  border: 2px solid #0f3460;
  color: #0f3460;
}

.btn.outline:hover {
  background: #0f3460;
  color: #fff;
}

.badge {
  display: inline-block;
  background: #ebf8ff;
  color: #2b6cb0;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.tag-list {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.75rem;
}

.tag {
  background: #f0f4ff;
  color: #4a5568;
  padding: 0.3rem 0.8rem;
  border-radius: 6px;
  font-size: 0.85rem;
  border: 1px solid #cbd5e0;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid #e2e8f0;
  color: #4a5568;
}

.contact-item:last-child {
  border-bottom: none;
}

.contact-label {
  font-weight: 600;
  width: 70px;
  color: #2d3748;
  flex-shrink: 0;
}

footer {
  text-align: center;
  padding: 2rem;
  color: #a0aec0;
  font-size: 0.85rem;
}