/* Copyright (c) 2026 OriginMind. Course reading and accessible interaction. */
.course-skip{position:fixed;left:12px;top:-80px;z-index:200;background:#fff;padding:12px 18px;border:2px solid #286446}
.course-skip:focus{top:12px}
.course-handbook{border:1px solid var(--line);border-radius:10px;background:#f6f5f0;padding:12px 18px;margin:0 0 24px}
.course-handbook>summary{min-height:44px;display:list-item;align-content:center;color:var(--ink);font-size:15px}
.course-handbook p,.course-handbook li{font-size:15px;line-height:1.85}
.course-handbook h2{font-size:20px}.course-handbook h3{font-size:17px}
.course-handbook .course-table-wrap{overflow:auto;max-width:100%;border:1px solid var(--line)}
.course-handbook table{width:100%;border-collapse:collapse;min-width:430px;font-size:14px}
.course-handbook th,.course-handbook td{padding:12px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
.course-handbook th{background:#eae9e0}.course-handbook td:first-child{white-space:nowrap}
.course-v2-note{border-left:3px solid #537b68;background:#edf2ed;padding:12px 16px;line-height:1.85}
.biped-v2 .md-practice-nav{display:flex;flex-wrap:wrap;gap:8px}
.biped-v2 .md-practice-nav a{padding:8px 12px;border:1px solid var(--line);border-radius:6px;min-height:44px;text-decoration:none}
.biped-v2 .v2-downloads{display:flex;gap:10px;flex-wrap:wrap}
.biped-v2 .v2-downloads a{display:inline-flex;align-items:center;min-height:44px;padding:9px 14px;border:1px solid var(--line);border-radius:6px}
.biped-v2 video{display:block;width:100%;max-width:760px;aspect-ratio:16/9;background:#202b30}
.biped-v2 figcaption{font-size:14px;color:var(--muted);line-height:1.8}
.md-practice-unit{scroll-margin-top:110px}
main p,main li{line-break:strict;overflow-wrap:break-word}
main pre,main code{line-break:auto}main pre{max-width:100%}
button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #386f99;outline-offset:3px}
summary{scroll-margin-top:100px}.course-version{font-variant-numeric:tabular-nums}
@media(max-width:620px){.course-handbook{padding:10px 12px}.course-handbook p,.course-handbook li{font-size:15px}.biped-v2 .v2-downloads{display:grid}.biped-v2 .md-practice-nav a{flex:1 1 125px}.card{min-width:0}.course-header .header-title{min-width:0}.course-header h1{overflow-wrap:break-word}.course-header .profile-entry{max-width:105px}.tabs button{min-height:48px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto!important}*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}}
@media print{.course-handbook{break-inside:avoid}.course-skip,.tabs,.directory,.header-actions{display:none!important}.layout{display:block!important}main{max-width:none!important;padding:0!important}body{padding:0!important}}