/* User guide — layout on top of home.css (same tokens, nav, footer, colours). */
.g-hero { position: relative; padding: 52px 0 30px; overflow: hidden; border-bottom: 1px solid var(--line); }
.g-hero::before { content: ""; position: absolute; inset: 0; z-index: -1;
  background: radial-gradient(45% 80% at 95% 0%, color-mix(in srgb, var(--c4) 18%, transparent), transparent 70%),
              radial-gradient(45% 80% at 0% 0%, color-mix(in srgb, var(--c1) 18%, transparent), transparent 70%),
              radial-gradient(35% 60% at 55% 30%, color-mix(in srgb, var(--c2) 10%, transparent), transparent 70%); }
.g-hero h1 { font-family: var(--font-display); font-size: clamp(34px, 4.6vw, 52px); letter-spacing: -.035em; line-height: 1.05; color: var(--ink); font-weight: 780; margin: 14px 0 12px; }
.g-hero p.lede { font-size: 18px; color: var(--muted); max-width: 680px; }
.g-meta { display: flex; flex-wrap: wrap; gap: 8px 16px; margin-top: 16px; font-size: 13.5px; color: var(--muted); }
.g-meta span { display: inline-flex; align-items: center; gap: 6px; }

/* quick starts */
.quick { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin: 30px 0 4px; }
.quick a { display: flex; flex-direction: column; gap: 6px; padding: 18px; border-radius: var(--r); background: var(--card); border: 1px solid var(--line); color: inherit; box-shadow: var(--shadow-sm); position: relative; overflow: hidden; transition: transform .15s ease, box-shadow .15s ease; }
.quick a::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 4px; background: var(--c); }
.quick a:hover { transform: translateY(-2px); box-shadow: var(--shadow); text-decoration: none; }
.quick a:nth-child(1) { --c: var(--c1); } .quick a:nth-child(2) { --c: var(--c3); } .quick a:nth-child(3) { --c: var(--c4); } .quick a:nth-child(4) { --c: var(--c2); }
.quick b { color: var(--ink); font-size: 15.5px; }
.quick span { color: var(--muted); font-size: 14px; }
.quick em { font-style: normal; color: var(--c); font-weight: 650; font-size: 13.5px; margin-top: auto; }
@media (max-width: 960px) { .quick { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .quick { grid-template-columns: 1fr; } }

/* layout: sidebar + article */
.g-layout { display: grid; grid-template-columns: 270px minmax(0, 1fr); gap: 48px; padding-top: 34px; padding-bottom: 90px; }
.g-side { position: sticky; top: 84px; align-self: start; max-height: calc(100vh - 100px); overflow: auto; padding-right: 6px; }
.g-search { position: relative; margin-bottom: 14px; }
.g-search input { width: 100%; font: inherit; font-size: 14.5px; padding: 10px 12px 10px 36px; border-radius: 10px; border: 1px solid var(--line); background: var(--card); color: var(--ink); }
.g-search input:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand) 20%, transparent); }
.g-search .ico { position: absolute; left: 11px; top: 11px; width: 17px; height: 17px; color: var(--muted); }
.g-search small { display: block; font-size: 12.5px; color: var(--muted); margin-top: 6px; min-height: 1em; }
.toc { list-style: none; font-size: 14px; }
.toc .part { font-size: 11.5px; font-weight: 750; letter-spacing: .07em; text-transform: uppercase; color: var(--muted); margin: 16px 0 6px; padding-left: 10px; }
.toc .part:first-child { margin-top: 0; }
.toc a { display: block; padding: 6px 10px; border-radius: 8px; color: var(--text); border-left: 2px solid transparent; }
.toc a:hover { background: var(--bg-soft); text-decoration: none; color: var(--ink); }
.toc a.on { color: var(--brand); background: color-mix(in srgb, var(--brand) 9%, transparent); border-left-color: var(--brand); font-weight: 650; }
.toc a .pill { margin-left: 4px; font-size: 9.5px; padding: 1px 6px; vertical-align: 1px; }
.toc li[hidden] { display: none; }
.toc-toggle { display: none; }
@media (max-width: 960px) {
  .g-layout { grid-template-columns: minmax(0, 1fr); gap: 0; padding-top: 20px; }
  .g-side { position: static; max-height: none; overflow: visible; padding: 0; margin-bottom: 26px; }
  .toc-toggle { display: flex; width: 100%; justify-content: space-between; align-items: center; font: inherit; font-weight: 650; color: var(--ink); background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 11px 14px; cursor: pointer; }
  .g-side:not(.open) .toc { display: none; }
  .g-side .toc { margin-top: 12px; border: 1px solid var(--line); border-radius: 12px; padding: 12px 6px; background: var(--card); }
}

/* article typography */
.g-doc { max-width: 780px; font-size: 16.5px; }
.g-doc .partHead { display: flex; align-items: center; gap: 12px; margin: 64px 0 6px; padding-top: 22px; border-top: 1px solid var(--line); }
.g-doc .partHead:first-child { margin-top: 0; border-top: 0; padding-top: 0; }
.g-doc .partHead .num { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; font-weight: 800; font-size: 15px; color: #fff; background: linear-gradient(135deg, var(--c1), var(--c2)); flex-shrink: 0; }
.g-doc .partHead h2 { font-family: var(--font-display); font-size: 30px; letter-spacing: -.025em; color: var(--ink); line-height: 1.15; }
.g-doc .partIntro { color: var(--muted); margin-bottom: 8px; }
.g-doc section { scroll-margin-top: 86px; }
.g-doc h3 { font-family: var(--font-display); font-size: 23px; letter-spacing: -.02em; color: var(--ink); margin: 40px 0 10px; line-height: 1.2; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; scroll-margin-top: 86px; }
.g-doc h4 { font-size: 17px; color: var(--ink); margin: 24px 0 8px; }
.g-doc p { margin: 0 0 14px; }
.g-doc ul, .g-doc ol { margin: 0 0 16px 22px; }
.g-doc li { margin-bottom: 7px; }
.g-doc strong, .g-doc b { color: var(--ink); }
.g-doc code, .g-doc kbd { font-family: ui-monospace, Consolas, Menlo, monospace; font-size: 13.5px; background: var(--bg-soft); border: 1px solid var(--line); border-radius: 6px; padding: 1px 6px; }
.g-doc a { text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--brand) 35%, transparent); text-underline-offset: 3px; }

/* numbered steps */
.g-doc ol.gsteps { list-style: none; margin-left: 0; counter-reset: s; }
.g-doc ol.gsteps > li { counter-increment: s; position: relative; padding-left: 44px; margin-bottom: 14px; }
.g-doc ol.gsteps > li::before { content: counter(s); position: absolute; left: 0; top: -1px; width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; font-weight: 800; font-size: 14px; color: var(--brand); background: color-mix(in srgb, var(--brand) 13%, transparent); }

/* callouts */
.co { display: flex; gap: 12px; padding: 14px 16px; border-radius: 12px; margin: 18px 0; font-size: 15.5px; border: 1px solid; }
.co .ico { width: 20px; height: 20px; flex-shrink: 0; margin-top: 2px; }
.co p:last-child { margin-bottom: 0; }
.co.tip { background: color-mix(in srgb, var(--c6) 9%, transparent); border-color: color-mix(in srgb, var(--c6) 25%, transparent); } .co.tip .ico { color: var(--c6); }
.co.note { background: color-mix(in srgb, var(--c1) 8%, transparent); border-color: color-mix(in srgb, var(--c1) 22%, transparent); } .co.note .ico { color: var(--c1); }
.co.warn { background: color-mix(in srgb, var(--c4) 10%, transparent); border-color: color-mix(in srgb, var(--c4) 28%, transparent); } .co.warn .ico { color: var(--c4); }
.co.pro { background: linear-gradient(135deg, color-mix(in srgb, var(--c4) 10%, transparent), color-mix(in srgb, var(--c5) 7%, transparent)); border-color: color-mix(in srgb, var(--c4) 30%, transparent); } .co.pro .ico { color: var(--accent-deep); }

/* screenshots (real panel captures, 2x) */
.pshot { margin: 20px 0 26px; display: flex; flex-direction: column; align-items: center; padding: 18px; border-radius: var(--r-lg);
  background: linear-gradient(135deg, color-mix(in srgb, var(--c1) 12%, var(--bg-soft)), color-mix(in srgb, var(--c2) 10%, var(--bg-soft)) 55%, color-mix(in srgb, var(--c4) 12%, var(--bg-soft))); }
.pshot a { display: block; width: 100%; max-width: 400px; }
.pshot img { width: 100%; border-radius: 10px; border: 1px solid var(--line); box-shadow: var(--shadow); }
.pshot.tall img { max-height: 620px; object-fit: cover; object-position: top; -webkit-mask-image: linear-gradient(#000 85%, transparent); mask-image: linear-gradient(#000 85%, transparent); }
.pshot figcaption { font-size: 13px; color: var(--muted); text-align: center; margin-top: 10px; }
.pshot.side { float: right; width: 300px; margin: 4px 0 18px 26px; padding: 12px; }
@media (max-width: 760px) { .pshot.side { float: none; width: auto; margin: 20px 0; } }
.clear { clear: both; }

/* reference tables */
.tbl { width: 100%; border-collapse: collapse; margin: 14px 0 20px; font-size: 15px; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; display: table; }
.tbl th { text-align: left; background: var(--bg-soft); color: var(--ink); font-size: 13px; text-transform: uppercase; letter-spacing: .04em; padding: 10px 14px; }
.tbl td { padding: 10px 14px; border-top: 1px solid var(--line); vertical-align: top; }
.tbl td:first-child { font-weight: 650; color: var(--ink); white-space: nowrap; }
.tbl-wrap { overflow-x: auto; }
@media (max-width: 600px) {
  .tbl thead { display: none; }
  .tbl, .tbl tbody, .tbl tr, .tbl td { display: block; width: 100%; }
  .tbl tr { border-top: 1px solid var(--line); padding: 10px 14px; }
  .tbl tr:first-child { border-top: 0; }
  .tbl td { border-top: 0; padding: 2px 0; }
  .tbl td:first-child { white-space: normal; }
  .tbl td:nth-child(3) { color: var(--muted); font-size: 14px; }
}

/* report anatomy */
.anat { border: 1px solid var(--line); border-radius: 14px; overflow: hidden; margin: 16px 0 22px; background: var(--card); }
.anat div { display: grid; grid-template-columns: 200px 1fr auto; gap: 12px; padding: 10px 14px; border-top: 1px solid var(--line); font-size: 14.5px; align-items: start; }
.anat div:first-child { border-top: 0; }
.anat b { color: var(--ink); }
.anat .who { font-size: 11px; font-weight: 750; letter-spacing: .04em; text-transform: uppercase; padding: 3px 8px; border-radius: 999px; white-space: nowrap; }
.anat .calc { background: color-mix(in srgb, var(--c3) 15%, transparent); color: var(--c3); }
.anat .ai { background: color-mix(in srgb, var(--c2) 15%, transparent); color: var(--c2); }
@media (max-width: 600px) { .anat div { grid-template-columns: 1fr auto; } .anat div span:nth-child(2) { grid-column: 1 / -1; order: 3; color: var(--muted); } }

/* faq */
.g-doc details { border: 1px solid var(--line); border-radius: 12px; background: var(--card); margin-bottom: 10px; }
.g-doc details summary { cursor: pointer; list-style: none; padding: 14px 18px; font-weight: 650; color: var(--ink); display: flex; justify-content: space-between; gap: 14px; }
.g-doc details summary::-webkit-details-marker { display: none; }
.g-doc details summary::after { content: "+"; color: var(--muted); font-size: 20px; line-height: 1; }
.g-doc details[open] summary::after { content: "–"; }
.g-doc details > div { padding: 0 18px 14px; color: var(--text); font-size: 15.5px; }
.g-doc details[open] { box-shadow: inset 4px 0 0 var(--c2); }

.toTop { position: fixed; right: 18px; bottom: 18px; width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; background: var(--brand); color: #fff; box-shadow: var(--shadow); opacity: 0; pointer-events: none; transition: opacity .2s ease; }
.toTop.show { opacity: 1; pointer-events: auto; }
.toTop .ico { width: 20px; height: 20px; }
.nav-links a[aria-current="page"] { color: var(--brand); background: color-mix(in srgb, var(--brand) 9%, transparent); }
mark.hit { background: color-mix(in srgb, var(--c4) 35%, transparent); color: inherit; border-radius: 3px; padding: 0 2px; }