.course-main{max-width:1180px;margin:36px auto 80px;padding:0 28px;color:var(--text,#272923)}
.course-back{display:inline-block;margin-bottom:24px;color:inherit;text-underline-offset:4px;font-size:14px}
.course-layout{display:grid;grid-template-columns:210px minmax(0,1fr);gap:48px;align-items:start}
.course-toc{position:sticky;top:90px;padding:18px 16px;border:1px solid #d8d2c8;border-radius:12px;display:grid;gap:5px;font-size:13px}
.course-toc strong{margin-bottom:8px;font-size:14px}.course-toc a{color:inherit;text-decoration:none;padding:8px 0;line-height:1.5}.course-toc a:hover{text-decoration:underline}
.course-article{min-width:0;font-size:16px;line-height:1.95;overflow-wrap:anywhere}.course-article a{color:inherit;text-underline-offset:4px}.course-eyebrow{font-size:12px;letter-spacing:2px;color:#6b705e}.course-hero h1{font-size:clamp(29px,3.5vw,43px);line-height:1.35;margin:12px 0 20px;font-weight:650;letter-spacing:-1px}.course-lead{font-size:18px;color:#606355;max-width:660px}.course-meta{font-size:12px;color:#747568}
.course-actions,.course-platforms{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0}.course-platforms a{border-bottom:1px solid #989e87;padding:6px 10px;text-decoration:none}
.course-button{display:inline-flex;justify-content:center;align-items:center;padding:10px 15px;background:#3d4835;color:#fff!important;border:1px solid #3d4835;border-radius:8px;font:inherit;font-size:14px;line-height:1.6;text-decoration:none;cursor:pointer}.course-button.secondary{color:inherit!important;background:transparent;border-color:#b7b7a8}.course-button:hover{filter:brightness(.92)}
.course-note{border-left:3px solid #899674;background:#89967412;padding:15px 18px;margin:24px 0;font-size:14px;line-height:1.85}.course-article section{margin-top:52px;padding-top:12px;border-top:1px solid #d8d2c8}.course-article h2{font-size:24px;line-height:1.5;margin:22px 0 20px}.course-article h3{font-size:19px;line-height:1.6;margin:30px 0 12px}.course-article h2,.course-article h3{scroll-margin-top:100px}.course-article p{margin:14px 0}.course-article li{margin:8px 0}.course-article ul,.course-article ol{padding-left:24px}
.course-hint{font-size:14px;color:#686d5c}.tokyo-dark .course-hint{color:#bbc1ad}
.course-article code{font-family:Consolas,"SFMono-Regular",monospace;font-size:.87em;background:#92988116;padding:2px 5px;border-radius:4px}.course-article pre{position:relative;white-space:pre-wrap;overflow-wrap:anywhere;background:#efeee7;border:1px solid #deddd3;border-radius:9px;padding:45px 18px 18px;line-height:1.8;font-size:14px;tab-size:2}.course-article pre code{font-size:inherit;background:none;padding:0}.course-copy{position:absolute;top:8px;right:10px;border:1px solid #c4c4b7;background:transparent;color:inherit;border-radius:5px;font:inherit;font-size:12px;padding:3px 10px;cursor:pointer}.course-copy:focus-visible,.course-button:focus-visible,.course-toc a:focus-visible{outline:3px solid #8fa476;outline-offset:3px}.course-copy-status{position:fixed;bottom:80px;left:50%;transform:translateX(-50%);background:#30392c;color:white;padding:8px 15px;border-radius:8px;font-size:14px;z-index:50;max-width:90vw}.course-copy-status:empty{display:none}
.course-table{overflow:auto;border:1px solid #d8d2c8;border-radius:9px;margin:20px 0}.course-table table{width:100%;border-collapse:collapse;text-align:left;font-size:14px;min-width:480px}.course-table th,.course-table td{padding:12px 14px;border-bottom:1px solid #d8d2c8;vertical-align:top}.course-table th{background:#89967412;font-weight:650}.course-table tr:last-child td{border-bottom:none}.course-examples{display:grid;gap:18px}.course-examples article{border:1px solid #d8d2c8;border-radius:12px;padding:22px}.course-examples h3{margin-top:10px}.course-tag{font-size:12px;color:#687854;letter-spacing:1px}.course-article details{border:1px solid #d8d2c8;border-radius:9px;padding:16px 18px;margin:22px 0}.course-article summary{cursor:pointer;font-weight:600;font-size:15px}
.tokyo-dark .course-main{color:#e4e1d7}.tokyo-dark .course-lead,.tokyo-dark .course-meta,.tokyo-dark .course-eyebrow,.tokyo-dark .course-tag{color:#b8bea6}.tokyo-dark .course-article pre{background:#2c2d27;border-color:#55574a}.tokyo-dark .course-toc,.tokyo-dark .course-article section,.tokyo-dark .course-examples article,.tokyo-dark .course-table,.tokyo-dark .course-article details,.tokyo-dark .course-table td,.tokyo-dark .course-table th{border-color:#55574a}
@media(max-width:850px){.course-layout{grid-template-columns:1fr;gap:0}.course-toc{display:none}.course-main{padding:0 20px;margin-top:24px}.course-article h2{font-size:22px}}
@media(max-width:480px){.tokyo-auth-actions a[href="account.html#register"]{display:none}.tokyo-nav-wrap{gap:8px}.tokyo-nav-tools{gap:5px}.course-main{padding:0 16px}.course-article{font-size:15px}.course-lead{font-size:16px}.course-toc{font-size:12px;padding:14px 12px;gap:0 10px}.course-examples article{padding:16px}.course-actions .course-button{font-size:13px;padding:9px 11px}.course-article pre{font-size:12px;padding-left:12px;padding-right:12px}.course-article section{margin-top:36px}}
@media print{.tokyo-nav-shell,.course-toc,.course-back,.course-actions,.course-platforms,.course-copy,.course-copy-status,.zs-tabbar,.zs-menu,.zs-fab{display:none!important}.course-main{max-width:none;margin:0;padding:0;color:#111!important}.course-layout{display:block}.course-article pre{background:#f4f4f4!important;color:#111!important;break-inside:avoid;padding-top:16px}.course-article{font-size:11pt;line-height:1.65}.course-article h2,.course-article h3{break-after:avoid}.course-table table{min-width:0}.course-table{overflow:visible}.course-examples article{break-inside:avoid}body{background:white!important}}