html:has(.handbook-content) { scroll-behavior: auto; }
.handbook-heading { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(260px, 1fr); align-items: center; gap: 36px; padding-bottom: 32px; border-bottom: 1px solid var(--line); }
.handbook-heading h1 { max-width: 650px; }
.handbook-heading .page-description { max-width: 540px; }
.handbook-start { display: inline-flex; align-items: center; gap: 10px; margin-top: 20px; }
.handbook-session { padding: 24px; border: 1px solid var(--semantic-info-line); border-radius: var(--radius); background: var(--semantic-info-bg); }
.handbook-session ol { list-style: none; padding: 0; margin: 16px 0; display: grid; gap: 14px; }
.handbook-session li { display: flex; gap: 12px; align-items: baseline; color: var(--ink); font-weight: 550; }
.handbook-session li span { color: var(--semantic-info); font: 600 12px ui-monospace, monospace; }
.handbook-session > p:last-child { font-size: var(--text-supporting); color: var(--secondary); margin: 0; line-height: 1.6; }
.handbook-layout { display: grid; grid-template-columns: 205px minmax(0, 780px); justify-content: center; align-items: start; gap: 36px; }
.handbook-rail { position: sticky; top: 94px; max-height: calc(100vh - 112px); overflow-y: auto; }
.handbook-toc { padding: 2px; }
.handbook-toc .eyebrow { margin-bottom: 8px; }
.handbook-rail-hint { font-size: 12px; color: var(--muted); line-height: 1.6; margin-bottom: 18px; }
.handbook-toc ol { display: grid; gap: 3px; list-style: none; margin: 0; padding: 0; }
.handbook-toc a { display: block; color: var(--secondary); font-size: var(--text-supporting); line-height: 1.4; padding: 9px 12px; border-left: 2px solid transparent; border-radius: 0 5px 5px 0; }
.handbook-toc a:hover { color: var(--ink); background: var(--subtle); }
.handbook-toc a.is-current { color: var(--semantic-info); background: var(--semantic-info-bg); border-left-color: var(--semantic-info); font-weight: 600; }
.handbook-rail-top { margin-top: 20px; }
.handbook-content { min-width: 0; font-size: var(--text-body); line-height: 1.75; overflow-wrap: anywhere; }
.handbook-content > p:first-child { font-size: var(--text-lead); color: var(--ink); }
/* The Portal has its own navigation; keep the Markdown contents intact for repository readers. */
.handbook-chapter[aria-labelledby="contents"] { display: none; }
.handbook-chapter { padding-top: 34px; margin-top: 30px; border-top: 1px solid var(--line); }
.handbook-content h2 { scroll-margin-top: 100px; font-size: 28px; letter-spacing: -.035em; line-height: 1.25; margin: 0 0 22px; }
.handbook-content h3 { scroll-margin-top: 120px; font-size: 20px; line-height: 1.35; margin: 0 0 16px; }
.handbook-content h2, .handbook-content h3 { color: var(--ink); font-weight: 650; }
.handbook-content p { color: var(--secondary); margin: 0 0 18px; }
.handbook-content strong { color: var(--ink); font-weight: 650; }
.handbook-subsection { margin-top: 28px; }
.handbook-step { padding: 28px; border: 1px solid var(--line); border-top: 3px solid var(--semantic-info-line); border-radius: var(--radius); background: var(--surface); margin-top: 28px; }
.handbook-step > :last-child { margin-bottom: 0; }
.handbook-content .handbook-step-label { font-size: 10px; letter-spacing: .12em; font-weight: 650; color: var(--semantic-info); margin-bottom: 9px; }
.handbook-content .handbook-location { background: var(--subtle); border: 1px solid var(--line); border-radius: 6px; padding: 12px 14px; color: var(--ink); font-size: var(--text-supporting); }
.handbook-content .handbook-next { border-top: 1px solid var(--line); padding-top: 18px; margin-top: 24px; font-weight: 550; }
.handbook-content code { background: var(--subtle); border: 1px solid var(--line); border-radius: 4px; color: var(--ink); font: .9em ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; padding: 1px 4px; }
.handbook-content a { color: var(--semantic-info); text-decoration: underline; text-underline-offset: 3px; }
.handbook-content a:hover { text-decoration-thickness: 2px; }
.handbook-layout a:focus-visible, .handbook-heading a:focus-visible { outline: 2px solid var(--semantic-info); outline-offset: 3px; }
.handbook-content ul, .handbook-content ol { color: var(--secondary); margin: 0 0 22px; padding-left: 25px; }
.handbook-content li { margin: 10px 0; padding-left: 5px; }
.handbook-step > ol > li { padding-left: 8px; margin: 16px 0; }
.handbook-step > ol > li::marker { color: var(--semantic-info); font-weight: 700; }
.handbook-callout { margin: 22px 0; padding: 16px 18px; border: 1px solid var(--line); border-left-width: 3px; border-radius: 0 6px 6px 0; background: var(--subtle); }
.handbook-content .handbook-callout p { margin: 0; font-size: var(--text-supporting); line-height: 1.7; }
.handbook-callout p > strong:first-child { display: block; margin-bottom: 5px; }
.handbook-callout-checkpoint { border-color: var(--semantic-success-line); background: var(--semantic-success-bg); }
.handbook-callout-checkpoint p > strong:first-child { color: var(--semantic-success); }
.handbook-callout-stop { border-color: var(--semantic-warning-line); background: var(--semantic-warning-bg); }
.handbook-callout-stop p > strong:first-child { color: var(--semantic-warning); }
.handbook-callout-troubleshoot { border-color: var(--semantic-info-line); background: var(--semantic-info-bg); }
.handbook-callout-troubleshoot p > strong:first-child { color: var(--semantic-info); }
.handbook-checklist { list-style: none; padding-left: 0 !important; }
.handbook-checklist li { display: flex; gap: 10px; align-items: flex-start; }
.handbook-check { width: 17px; height: 17px; display: inline-grid; place-items: center; flex: 0 0 auto; margin-top: 5px; border: 1px solid var(--strong-line); border-radius: 3px; color: var(--ink); font-size: 11px; }
.handbook-flow { margin: 26px 0; padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--subtle); }
.handbook-flow figcaption { display: grid; gap: 6px; margin-bottom: 15px; }
.handbook-flow figcaption strong { font-size: var(--text-action); }
.handbook-flow figcaption span { color: var(--secondary); font-size: var(--text-supporting); line-height: 1.55; }
.handbook-flow-path { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; padding: 8px 0; }
.handbook-flow-step { max-width: 185px; padding: 8px 10px; border: 1px solid var(--strong-line); border-radius: 6px; background: var(--surface); color: var(--ink); font-size: var(--text-supporting); font-weight: 550; line-height: 1.35; }
.handbook-flow-arrow { color: var(--muted); font-size: 17px; }
.handbook-top { padding-top: 20px; border-top: 1px solid var(--line); margin-top: 42px !important; }
.handbook-top a { display: inline-flex; align-items: center; gap: 7px; }
.handbook-top .icon { width: 15px; height: 15px; transform: rotate(180deg); }
@media (max-width: 1150px) { .handbook-heading { grid-template-columns: minmax(0, 1fr); gap: 24px; } .handbook-layout { grid-template-columns: 180px minmax(0, 1fr); gap: 24px; } }
@media (max-width: 900px) { .handbook-layout { grid-template-columns: minmax(0, 760px); } .handbook-rail { position: static; max-height: none; } .handbook-toc { border-bottom: 1px solid var(--line); padding-bottom: 18px; } .handbook-toc ol { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 12px; } .handbook-rail-hint, .handbook-rail-top { display: none !important; } }
@media (max-width: 600px) { .handbook-heading { padding-bottom: 24px; } .handbook-session { padding: 18px; } .handbook-toc a { padding: 10px 8px; } .handbook-content h2 { font-size: 25px; } .handbook-content h3 { font-size: 19px; } .handbook-step { padding: 19px 16px; } .handbook-flow { padding: 15px; } .handbook-flow-path { align-items: stretch; flex-direction: column; } .handbook-flow-step { max-width: none; } .handbook-flow-arrow { align-self: center; transform: rotate(90deg); } }