:root {
  --primary-color: #0052CC;
  --text-color: #333333;
  --bg-color: #f4f7f6;
  --card-bg: #ffffff;
  --border-color: #e0e0e0;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 20px;
}

header {
  text-align: center;
  margin-bottom: 50px;
}

h1 {
  color: var(--primary-color);
  margin-bottom: 10px;
  font-weight: 700;
  font-size: 2.2em;
}

h2 {
  color: #222;
  margin-top: 35px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 10px;
  font-size: 1.5em;
  font-weight: 600;
}

p {
  margin-bottom: 16px;
}

ul {
  margin-bottom: 20px;
  padding-left: 20px;
}

li {
  margin-bottom: 8px;
}

.card {
  background: var(--card-bg);
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.links {
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-top: 30px;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.links a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  background: var(--card-bg);
  color: var(--primary-color);
  text-decoration: none;
  border-radius: 12px;
  font-weight: 600;
  box-shadow: 0 4px 8px rgba(0,0,0,0.05);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
  border: 2px solid var(--border-color);
}

.links a div {
  display: flex;
  flex-direction: column;
}

.btn-title {
  font-size: 1.15em;
  color: #222;
  margin-bottom: 4px;
}

.btn-desc {
  font-size: 0.85em;
  font-weight: 400;
  color: #666;
}

.links a:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 16px rgba(0,0,0,0.08);
  background: #fdfdfd;
  border-color: var(--primary-color);
}

.links a::after {
  content: '→';
  font-size: 1.2em;
  transition: transform 0.2s ease;
}

.links a:hover::after {
  transform: translateX(4px);
}

.back-link {
  display: inline-block;
  margin-bottom: 25px;
  color: #666;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.back-link:hover {
  color: var(--primary-color);
}

footer {
  text-align: center;
  margin-top: 60px;
  color: #888;
  font-size: 0.9em;
}

@media (max-width: 600px) {
  .container {
    padding: 20px 15px;
  }
  .card {
    padding: 25px 20px;
  }
}