body { font-family: system-ui, sans-serif; max-width: 700px; margin: 0 auto; padding: 24px 20px; color: #1a1a2e; }
a { color: #1a6bb5; text-decoration: none; }
h2 { margin-bottom: 8px; }
h2 a:hover { text-decoration: underline; }
.breadcrumb { font-size: 13px; color: #888; margin-bottom: 24px; }
ul { list-style: none; padding: 0; }
li { padding: 10px 0; border-bottom: 1px solid #f0f0f0; }
li a:hover { text-decoration: underline; }
section { margin-bottom: 32px; padding-bottom: 16px; border-bottom: 2px solid #eee; }
.badge { font-size: 11px; font-weight: 600; padding: 2px 7px; border-radius: 10px; margin-right: 6px; text-transform: uppercase; }
.badge-theory { background: #e8f4fd; color: #1a6bb5; }
.badge-task { background: #fff0e0; color: #c75a00; }
.badge-video { background: #f0e8ff; color: #6b1ab5; }
.badge-quiz { background: #e8fff0; color: #1ab55a; }