.course-site-header{max-width:1120px;margin:0 auto;padding:1rem clamp(1rem,4vw,2.5rem);display:flex;justify-content:space-between;align-items:center;gap:1rem;border-bottom:1px solid #27374b;background:rgba(8,14,23,.96);color:#eaf0f9;font: .67rem/1.5 'IBM Plex Mono',monospace;letter-spacing:.08em;text-transform:uppercase}
.course-site-header a{color:#cbd7ea;text-decoration:none}
.course-site-header a:hover{color:#8bb4ff}
.course-site-header__links{display:flex;flex-wrap:wrap;gap:.75rem 1.2rem;justify-content:flex-end}
.course-site-header__mark{white-space:nowrap;color:#f1f4f9!important}
.course-overview{max-width:1120px;margin:0 auto;padding:clamp(2rem,4vw,3rem) clamp(1rem,4vw,2.5rem) 1rem}
.course-overview__breadcrumb{color:#8ea1bd;font:.62rem/1.5 'IBM Plex Mono',monospace;letter-spacing:.12em;text-transform:uppercase;margin:0 0 1.1rem}
.course-overview__breadcrumb a{color:#a9c7ff;text-underline-offset:3px}
.course-overview__eyebrow{color:#81aaff;font:.66rem/1.5 'IBM Plex Mono',monospace;letter-spacing:.13em;text-transform:uppercase;margin:0 0 .6rem}
.course-overview__summary{color:#c6d0e0;font:400 .95rem/1.8 'DM Sans',sans-serif;max-width:70ch;margin:.8rem 0 1rem}
.course-cover{margin:1.25rem 0 0;max-width:760px;border:1px solid #293b52;background:#07111c;padding:1rem;overflow:hidden}
.course-cover img{display:block;width:100%;height:auto;max-height:250px;object-fit:contain}
.course-lesson-index{max-width:1120px;margin:1rem auto 2rem;padding:0 clamp(1rem,4vw,2.5rem)}
.course-lesson-index__title{color:#92a5c1;font:.62rem/1.5 'IBM Plex Mono',monospace;letter-spacing:.12em;text-transform:uppercase;margin:0 0 .7rem}
.course-lesson-index__links{display:flex;flex-wrap:wrap;gap:.5rem;margin:0;padding:0;list-style:none}
.course-lesson-index__links a{display:block;color:#d5e0f0;border:1px solid #31445e;background:#0c1724;padding:.55rem .75rem;text-decoration:none;font: .72rem/1.4 'DM Sans',sans-serif}
.course-lesson-index__links a:hover,.course-lesson-index__links a:focus-visible{border-color:#6c98e8;color:#fff;outline-offset:2px}
.source-learning-content{max-width:1180px;margin:0 auto;padding:0 clamp(.75rem,3vw,2rem) 2rem;scroll-margin-top:1.5rem}
.source-learning-content .chapter{scroll-margin-top:1rem}
.source-learning-content .col[id]{scroll-margin-top:1.5rem}
.course-page-nav{max-width:1120px;margin:0 auto;padding:1.3rem clamp(1rem,4vw,2.5rem) 3rem;border-top:1px solid #27374b;display:flex;justify-content:space-between;gap:1rem;align-items:center}
.course-page-nav a{color:#a9c7ff;text-decoration:none;font:.67rem/1.5 'IBM Plex Mono',monospace;letter-spacing:.09em;text-transform:uppercase}
.course-page-nav a:hover{text-decoration:underline;text-underline-offset:3px}
.course-page-nav a[aria-disabled="true"]{opacity:.42;pointer-events:none}
.course-source-note{max-width:1120px;margin:0 auto;padding:0 clamp(1rem,4vw,2.5rem) 2.5rem;color:#8393aa;font:.7rem/1.7 'DM Sans',sans-serif}
.course-source-note a{color:#a9c7ff;text-underline-offset:3px}
@media(max-width:650px){.course-site-header{align-items:flex-start;flex-direction:column}.course-site-header__links{justify-content:flex-start}.course-cover{padding:.5rem}.course-page-nav{align-items:flex-start;flex-direction:column}}
@media(prefers-reduced-motion:reduce){html:focus-within{scroll-behavior:auto}}

.course-site-header__mark{display:inline-flex;align-items:center;gap:.5rem}
.course-site-header__mark img{display:inline-block;width:24px;height:24px;object-fit:contain;flex:0 0 auto}
.course-overview__title{color:#f2f5fa;font:500 clamp(2.3rem,5.6vw,4.7rem)/.98 'Space Grotesk',sans-serif;letter-spacing:-.07em;margin:.2rem 0 .7rem}
.course-cover img{aspect-ratio:16/9}
.course-lesson-anchor{display:block;height:0;scroll-margin-top:1.5rem}
.course-lesson-anchor:focus{outline:2px solid #4f8cff;outline-offset:5px}