* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; line-height: 1.7; color: #1a1a2e; background: #f8f9fa; max-width: 860px; margin: 0 auto; padding: 20px; }
header { margin-bottom: 2em; padding-bottom: 1em; border-bottom: 3px solid #e63946; }
h1 { font-size: 2em; color: #1a1a2e; }
.subtitle { color: #6c757d; font-size: 1.1em; margin-top: 0.3em; }
h2 { color: #e63946; margin: 1.5em 0 0.5em; }
h3 { color: #1a1a2e; margin: 1em 0 0.5em; }
p, li { margin-bottom: 0.8em; }
a { color: #457b9d; text-decoration: none; }
a:hover { text-decoration: underline; }
.guide-list { display: grid; gap: 1em; }
.guide-card { background: white; border-radius: 8px; padding: 1.2em; box-shadow: 0 1px 3px rgba(0,0,0,0.1); }
.guide-card h2 { margin-top: 0; }
.guide-card h2 a { color: #1a1a2e; }
.guide-card h2 a:hover { color: #e63946; }
.guide-meta { color: #6c757d; font-size: 0.9em; margin-top: 0.5em; }
table { width: 100%; border-collapse: collapse; margin: 1em 0; }
th, td { border: 1px solid #dee2e6; padding: 0.6em 0.8em; text-align: left; }
th { background: #e63946; color: white; }
tr:nth-child(even) { background: #f1f3f5; }
.callout { background: #fff3cd; border-left: 4px solid #ffc107; padding: 1em; margin: 1em 0; border-radius: 4px; }
.callout-info { background: #d1ecf1; border-left: 4px solid #17a2b8; padding: 1em; margin: 1em 0; border-radius: 4px; }
.callout-danger { background: #f8d7da; border-left: 4px solid #dc3545; padding: 1em; margin: 1em 0; border-radius: 4px; }
.callout-success { background: #d4edda; border-left: 4px solid #28a745; padding: 1em; margin: 1em 0; border-radius: 4px; }
.back-link { display: inline-block; margin-bottom: 1em; color: #6c757d; }
.back-link:hover { color: #e63946; }
ul, ol { padding-left: 1.5em; margin-bottom: 1em; }
footer { margin-top: 3em; padding-top: 1em; border-top: 1px solid #dee2e6; color: #6c757d; font-size: 0.9em; text-align: center; }
@media (max-width: 600px) { body { padding: 12px; } h1 { font-size: 1.5em; } }