:root { scroll-behavior:smooth; scroll-padding-top:100px; }
* { box-sizing:border-box; }
body { margin:0; font-family:var(--font-interface); line-height:1.85; font-size:16px; }
[hidden] { display:none !important; }
svg { width:19px; height:19px; stroke-width:1.7; flex-shrink:0; vertical-align:middle; }
a { color:var(--accent-blue); text-underline-offset:4px; }
a:focus-visible, summary:focus-visible { outline:3px solid var(--accent-blue); outline-offset:4px; }
h1,h2,h3,p,dd,dt,li { overflow-wrap:anywhere; }
h1,h2,h3 { font-family:var(--font-interface); font-weight:500; line-height:1.5; }
p { margin:12px 0; }
.skip-link { position:fixed; top:10px; left:16px; transform:translateY(-160%); background:#fff; z-index:50; padding:8px 16px; }
.skip-link:focus { transform:translateY(0); }
.guide-header { position:sticky; top:0; z-index:20; display:flex; justify-content:space-between; align-items:center; gap:22px; min-height:72px; padding:12px 32px; background:rgba(255,255,255,.9); backdrop-filter:blur(20px); -webkit-backdrop-filter:blur(20px); border-bottom:1px solid var(--line); }
.guide-brand { display:flex; align-items:center; gap:12px; color:var(--ink); font-size:15px; font-weight:600; text-decoration:none; }
.guide-brand img { width:28px; height:28px; object-fit:contain; }
.guide-header nav { display:flex; gap:22px; align-items:center; }
.guide-header nav a { display:inline-flex; align-items:center; gap:6px; text-decoration:none; font-size:13px; min-height:44px; }
.guide-layout { max-width:1200px; margin:auto; display:grid; grid-template-columns:215px minmax(0,1fr); }
.guide-sidebar { position:sticky; top:72px; height:calc(100dvh - 72px); overflow-y:auto; padding:34px 18px 30px; border-right:1px solid #e8edf5; }
.guide-sidebar a { display:block; color:var(--muted); font-size:13px; text-decoration:none; padding:10px 12px; border-radius:5px; }
.guide-sidebar a:hover { color:var(--accent-blue); background:var(--accent-soft); }
main { min-width:0; width:100%; max-width:850px; padding:44px 44px 0; margin:auto; }
.guide-intro { padding-bottom:20px; }
.guide-context { color:var(--muted); font-size:12px; margin:0 0 14px; }
h1 { font-size:34px; margin:0 0 22px; }
.guide-lead { font-size:16px; max-width:42em; color:#52657f; }
.field-map { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:0 22px; margin:28px 0 24px; border-block:1px solid var(--line); }
.field-map a { display:flex; align-items:flex-start; gap:10px; padding:19px 0; min-width:0; text-decoration:none; }
.field-map a:hover strong { text-decoration:underline; text-underline-offset:4px; }
.field-map a > svg { margin-top:3px; color:#688bb4; }
.field-map strong { display:block; font-size:14px; font-weight:600; }
.field-map small { display:block; font-size:11px; color:var(--muted); margin-top:3px; }
.guide-note { font-size:13px; line-height:1.85; color:var(--muted); border-left:2px solid #cbd9ec; padding:4px 0 4px 16px; margin:20px 0; }
.guide-section { padding:34px 0; border-top:1px solid #e5ebf3; }
h2 { font-size:24px; margin:0 0 18px; }
h2 > span { color:var(--muted); display:block; font-size:12px; font-weight:400; margin-top:5px; }
h3 { font-size:18px; margin:0 0 12px; }
.example-list { display:grid; grid-template-columns:1fr 1fr; gap:6px 22px; margin:18px 0; padding-left:22px; font-size:14px; }
.field-example { margin:22px 0; padding:18px 22px; background:#f5f8fd; border-radius:6px; }
.field-example > div { display:grid; grid-template-columns:55px minmax(0,1fr); gap:16px; padding:7px 0; }
dt { font-weight:500; }
dd { margin:0; }
.field-example dt { font-size:12px; color:var(--muted); padding-top:2px; }
.field-example dd { font-size:14px; }
.distinction { margin:24px 0; }
.distinction p { display:grid; grid-template-columns:90px minmax(0,1fr); gap:14px; padding:11px 0; margin:0; }
.distinction strong { font-size:13px; color:var(--accent-blue); font-weight:500; }
.distinction span { font-size:14px; color:var(--muted); }
blockquote { margin:16px 0; padding:12px 18px; background:#f5f8fd; border-left:2px solid #a9bfdc; font-size:14px; line-height:1.9; }
.instruction-example { padding:18px 22px; }
.instruction-example p { margin:0; }
.instruction-parts { margin:24px 0; }
.instruction-parts > div { display:grid; grid-template-columns:104px minmax(0,1fr); gap:22px; padding:18px 0; border-top:1px solid var(--line); }
.instruction-parts dt { font-size:15px; color:var(--ink); }
.instruction-parts dt span { display:block; font-size:11px; color:var(--accent-blue); margin-bottom:4px; }
.instruction-parts dd p { margin:0; font-size:14px; }
.instruction-parts blockquote { margin:8px 0 0; padding:0; border:0; background:none; font-size:13px; color:var(--muted); }
.tool-list { margin:24px 0 0; }
.tool-list details { border-top:1px solid var(--line); }
.tool-list details:last-child { border-bottom:1px solid var(--line); }
.tool-list summary { display:flex; align-items:center; gap:14px; list-style:none; cursor:pointer; padding:18px 6px; min-height:72px; }
.tool-list summary::-webkit-details-marker { display:none; }
.tool-list summary::after { content:'+'; font-size:21px; font-weight:400; color:var(--accent-blue); margin-left:auto; padding:0 9px; }
.tool-list details[open] > summary::after { content:'−'; }
.tool-list summary > svg { color:#6687b0; }
.tool-list summary strong { display:block; font-size:15px; font-weight:500; }
.tool-list summary small { display:block; font-size:12px; color:var(--muted); margin-top:3px; }
.tool-body { padding:0 12px 22px 39px; }
.tool-body p,.tool-body li { font-size:14px; }
.tool-body .guide-note { font-size:12px; }
.inline-flow { display:flex; flex-wrap:wrap; gap:8px 26px; font-size:12px; padding:14px 0 14px 20px; color:var(--accent-blue); }
.research-flow { padding-left:20px; font-size:14px; }
.document-list { list-style:none; padding:0; margin:20px 0; }
.document-list li { display:flex; align-items:center; gap:10px; padding:7px 0; font-size:14px; }
.document-list svg { color:#6f8aad; width:16px; height:16px; }
.review-list { font-size:14px; padding-left:22px; }
.review-list li { padding:5px 0; }
.save-note { display:flex; align-items:flex-start; gap:12px; padding:18px; background:#eff4fb; border-radius:6px; font-size:14px; }
.save-note svg { margin-top:4px; color:var(--accent-blue); }
.save-note strong { display:block; font-weight:600; }
.composition-map { margin:28px 0 12px; border:1px solid var(--line); border-radius:7px; padding:24px; background:rgba(255,255,255,.85); box-shadow:var(--reading-shadow); }
.composition-inputs { display:flex; justify-content:center; flex-wrap:wrap; gap:12px 24px; color:var(--muted); font-size:13px; }
.composition-model { display:flex; justify-content:center; align-items:center; flex-wrap:wrap; gap:9px 12px; margin:18px 0; padding:18px 12px; border-block:1px solid var(--line); color:var(--accent-blue); }
.composition-model strong { font-size:17px; font-weight:500; }
.composition-model span { flex-basis:100%; text-align:center; color:var(--muted); font-size:12px; }
.composition-output { text-align:center; font-size:13px; }
.helper-text { font-size:12px; color:var(--muted); }
.component-roles { margin:24px 0 0; }
.component-roles > div { display:grid; grid-template-columns:140px minmax(0,1fr); gap:18px; padding:12px 0; border-bottom:1px solid #e9eef5; font-size:14px; }
.component-roles dd { color:var(--muted); }
.comparison-grid { display:grid; grid-template-columns:1fr 1fr; gap:30px; margin:26px 0; }
.comparison-grid section { border-top:2px solid #c9d9ee; padding-top:17px; }
.comparison-grid section + section { border-color:#aebed5; }
.comparison-grid p { font-size:13px; color:var(--muted); }
.comparison-grid ul { padding-left:18px; font-size:13px; line-height:2; }
.return-to-lab { padding:34px 0; border-top:1px solid var(--line); }
.return-to-lab p { color:var(--muted); font-size:14px; }
.guide-actions { display:flex; align-items:center; flex-wrap:wrap; gap:14px; margin-top:20px; }
.guide-actions a { display:inline-flex; align-items:center; gap:14px; padding:10px 16px; border-radius:6px; min-height:44px; font-size:13px; text-decoration:none; }
.primary-link { color:#fff; border:1px solid #456b99; }
.secondary-link { border:1px solid var(--line); background:#fff; }
.guide-footer { display:flex; justify-content:space-between; align-items:center; gap:18px; border-top:1px solid var(--line); padding:22px 0 32px; color:var(--muted); font-size:11px; }
.guide-footer a { display:flex; align-items:center; gap:7px; min-height:40px; text-decoration:none; }
@media (max-width:1000px) { .guide-layout { grid-template-columns:185px minmax(0,1fr); } main { padding:32px 28px 0; } .field-map { grid-template-columns:1fr 1fr; } }
@media (max-width:760px) { :root { scroll-padding-top:86px; } .guide-header { padding:10px 18px; min-height:66px; gap:12px; } .guide-brand { font-size:13px; gap:8px; } .guide-brand img { width:24px; height:24px; } .guide-header nav { gap:14px; } .guide-header nav a { font-size:12px; } .guide-header .gemini-link { display:none; } .guide-layout { display:block; } .guide-sidebar { position:static; height:auto; border:0; padding:18px 18px 0; overflow:visible; } .guide-sidebar nav { display:flex; flex-wrap:wrap; gap:2px; } .guide-sidebar a { font-size:11px; padding:7px 9px; background:#f4f7fc; } main { padding:26px 22px 0; } h1 { font-size:28px; } h2 { font-size:22px; } .guide-lead { font-size:15px; } .guide-section { padding:28px 0; } .guide-intro { padding-bottom:14px; } .instruction-parts > div { grid-template-columns:80px minmax(0,1fr); gap:16px; } .tool-body { padding-left:12px; } .component-roles > div { grid-template-columns:120px minmax(0,1fr); gap:12px; font-size:13px; } .comparison-grid { grid-template-columns:1fr; gap:24px; } .guide-footer { flex-wrap:wrap; } }
@media (max-width:380px) { .guide-header { padding-inline:12px; } .guide-header nav { gap:10px; } .guide-brand { gap:6px; } .field-map { gap:0 12px; } .field-map a { gap:7px; } .field-map small { font-size:10px; } .distinction p { grid-template-columns:70px minmax(0,1fr); gap:10px; } }
@media (prefers-reduced-motion:reduce) { :root { scroll-behavior:auto; } }