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

html { font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
  background: #fafaf7;
  padding: 0;
}

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 24px 64px;
}

header {
  border-bottom: 1px solid #e5e5e0;
  padding-bottom: 24px;
  margin-bottom: 40px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.5rem;
  font-weight: 800;
  text-decoration: none;
  color: #1a1a1a;
}

.brand-dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  background: #d8232a;
  border-radius: 50%;
}

nav {
  margin-top: 16px;
  display: flex;
  gap: 20px;
  font-size: 0.95rem;
}

nav a {
  color: #555;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}

nav a:hover { color: #1a1a1a; border-bottom-color: #d8232a; }

h1 {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-top: 32px;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 20px;
  margin-bottom: 8px;
}

p, li {
  margin-bottom: 12px;
  color: #333;
}

ul, ol {
  padding-left: 24px;
  margin-bottom: 16px;
}

a { color: #d8232a; text-decoration: underline; }
a:hover { color: #a01b21; }

.updated {
  color: #888;
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.notice {
  background: #fff;
  border-left: 3px solid #d8232a;
  padding: 16px 20px;
  margin: 24px 0;
  border-radius: 4px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

footer {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid #e5e5e0;
  color: #888;
  font-size: 0.9rem;
  text-align: center;
}

footer a { color: #888; }

@media (max-width: 480px) {
  .container { padding: 32px 16px; }
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.2rem; }
}