:root {
  --bg: #ffffff;
  --text: #1d1d1f;
  --text-secondary: #6e6e73;
  --accent: #007AFF;
  --border: rgba(0, 0, 0, 0.08);
  --card-bg: #f5f5f7;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --text: #f5f5f7;
    --text-secondary: #a1a1a6;
    --accent: #2997ff;
    --border: rgba(255, 255, 255, 0.1);
    --card-bg: #1d1d1f;
  }
}

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

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

.container {
  max-width: 680px;
  margin: 0 auto;
  padding: 60px 24px 80px;
}

.nav {
  display: flex;
  gap: 24px;
  margin-bottom: 48px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.nav a {
  color: var(--accent);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
}

.nav a:hover {
  text-decoration: underline;
}

.icon {
  width: 64px;
  height: 64px;
  background: #007AFF;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  margin-bottom: 24px;
}

.icon-img {
  width: 120px;
  height: 120px;
  max-width: 120px;
  object-fit: cover;
  border-radius: 18px;
  margin-bottom: 24px;
  display: block;
}

h1 {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 8px;
  line-height: 1.1;
}

.subtitle {
  font-size: 19px;
  color: var(--text-secondary);
  margin-bottom: 40px;
  line-height: 1.5;
}

h2 {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.3px;
  margin-top: 40px;
  margin-bottom: 12px;
}

h3 {
  font-size: 19px;
  font-weight: 600;
  margin-top: 28px;
  margin-bottom: 8px;
}

p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.7;
}

ul {
  list-style: none;
  padding: 0;
  margin-bottom: 16px;
}

ul li {
  font-size: 16px;
  color: var(--text-secondary);
  padding: 4px 0 4px 20px;
  position: relative;
  line-height: 1.6;
}

ul li::before {
  content: '\2022';
  color: var(--accent);
  position: absolute;
  left: 0;
  font-weight: 700;
}

a {
  color: var(--accent);
}

.card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 32px;
}

.card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 24px;
  text-decoration: none;
  transition: transform 0.2s;
}

.card:hover {
  transform: scale(1.02);
}

.card-icon {
  font-size: 28px;
  margin-bottom: 12px;
}

.card h3 {
  margin-top: 0;
  color: var(--text);
}

.card p {
  font-size: 14px;
  margin-bottom: 0;
}

.effective-date {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

@media (max-width: 540px) {
  .container {
    padding: 40px 20px 60px;
  }

  h1 {
    font-size: 32px;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }
}