/* course: calm cyan */
body.theme-course { --site-accent: #4ba8da; --site-accent-soft: #7ad8ff; --site-accent-ink: #07303c; }
body.theme-course .site-header { background: linear-gradient(90deg, rgba(7, 19, 30, 0.94), rgba(9, 33, 44, 0.82)); border-bottom-color: rgba(102, 201, 236, 0.22); }
body.theme-course .brand-link { color: #ecfbff; }
body.theme-course .nav-link:hover, body.theme-course .nav-btn:hover { background: rgba(118, 214, 255, 0.14); text-decoration: none; }
body.theme-course .site-switcher-trigger { border-color: rgba(118, 214, 255, 0.28); }
body.theme-course .site-switcher-item.is-current { background: rgba(118, 214, 255, 0.18); }
:root[data-theme='light'] body.theme-course { --site-accent: #1d88af; --site-accent-soft: #49b7de; --site-accent-ink: #082f39; }
:root[data-theme='light'] body.theme-course .site-header { background: linear-gradient(90deg, rgba(244, 251, 255, 0.96), rgba(233, 246, 251, 0.92)); border-bottom-color: rgba(46, 154, 188, 0.22); }
:root[data-theme='light'] body.theme-course .brand-link { color: #0b4f64; }