.investigation-guide { color: var(--guide-text); }
.investigation-shell { width: min(1080px, calc(100% - 48px)); margin: 0 auto; }
.investigation-hero { padding: 82px 0 70px; border-bottom: 1px solid var(--guide-border); background: linear-gradient(135deg, rgba(47,143,255,.12), transparent 58%); }
.investigation-eyebrow, .investigation-section-label { margin: 0 0 12px; color: var(--guide-accent); font-size: 12px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.investigation-hero h1 { max-width: 900px; margin: 0; color: #fff; font-size: clamp(40px, 6vw, 64px); line-height: 1.05; letter-spacing: -.04em; }
.investigation-lead { max-width: 780px; margin: 24px 0 0; color: #c5cfdd; font-size: 21px; line-height: 1.6; }
.investigation-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.investigation-meta span { padding: 7px 12px; border: 1px solid var(--guide-border); border-radius: 999px; background: rgba(255,255,255,.035); color: #cbd5e1; font-size: 13px; }
.investigation-layout { display: grid; grid-template-columns: minmax(0, 1fr) 220px; gap: 64px; align-items: start; padding-top: 64px; padding-bottom: 80px; }
.investigation-content section { scroll-margin-top: 100px; }
.investigation-content section + section { margin-top: 64px; padding-top: 64px; border-top: 1px solid var(--guide-border); }
.investigation-content h2 { margin: 0 0 18px; color: #fff; font-size: clamp(27px, 4vw, 36px); line-height: 1.2; letter-spacing: -.025em; }
.investigation-content h3 { margin: 0 0 14px; color: #fff; font-size: 19px; }
.investigation-content p, .investigation-content li { color: var(--guide-muted); font-size: 17px; line-height: 1.7; }
.investigation-steps { display: grid; gap: 14px; margin: 28px 0 0; padding: 0; list-style: none; }
.investigation-steps li { display: grid; grid-template-columns: 38px 1fr; gap: 16px; align-items: start; padding: 20px; border: 1px solid var(--guide-border); border-radius: 12px; background: var(--guide-surface); }
.investigation-steps li > span { display: grid; width: 38px; height: 38px; place-items: center; border-radius: 50%; background: var(--guide-accent-soft); color: var(--guide-accent); font-weight: 800; }
.investigation-steps p { margin: 4px 0 0; }
.investigation-list { display: grid; gap: 12px; margin: 24px 0 0; padding: 0; list-style: none; }
.investigation-list li { position: relative; padding-left: 26px; }
.investigation-list li::before { position: absolute; top: .72em; left: 2px; width: 7px; height: 7px; border-radius: 50%; background: var(--guide-accent); content: ''; }
.investigation-decision-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 28px; }
.investigation-decision { padding: 24px; border: 1px solid var(--guide-border); border-radius: 14px; background: var(--guide-surface); }
.investigation-decision ul { margin: 0; padding-left: 20px; }
.investigation-decision li + li { margin-top: 10px; }
.investigation-decision-escalate { border-top: 3px solid #f3c94b; }
.investigation-decision-deescalate { border-top: 3px solid #58d3a5; }
.investigation-cta { padding: clamp(28px, 5vw, 44px) !important; border: 1px solid rgba(94,168,255,.25) !important; border-radius: 18px; background: linear-gradient(135deg, rgba(47,143,255,.12), rgba(255,255,255,.025)); }
.investigation-cta-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.investigation-button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; padding: 0 18px; border: 1px solid transparent; border-radius: 8px; font-weight: 800; text-decoration: none; }
.tutorial-page-content .investigation-button-primary,
.tutorial-page-content .investigation-button-primary:visited,
.tutorial-page-content .investigation-button-primary:hover,
.tutorial-page-content .investigation-button-primary:focus { background: var(--guide-accent); color: #08111e; }
.tutorial-page-content .investigation-button-primary:hover,
.tutorial-page-content .investigation-button-primary:focus { background: #82bcff; }
.tutorial-page-content .investigation-button-secondary,
.tutorial-page-content .investigation-button-secondary:visited { border-color: var(--guide-border); background: rgba(255,255,255,.04); color: #fff; }
.investigation-toc { position: sticky; top: 108px; display: grid; gap: 12px; padding: 20px; border: 1px solid var(--guide-border); border-radius: 12px; background: var(--guide-surface); }
.investigation-toc strong { margin-bottom: 4px; color: #fff; font-size: 14px; }
.investigation-toc a { color: var(--guide-muted); font-size: 14px; text-decoration: none; }
.investigation-toc a:hover { color: var(--guide-accent); }
.investigation-index-content { padding-top: 64px; padding-bottom: 80px; }
.investigation-index-heading { max-width: 760px; }
.investigation-index-heading h2 { margin: 0 0 16px; color: #fff; font-size: clamp(28px, 4vw, 38px); line-height: 1.2; letter-spacing: -.025em; }
.investigation-index-heading > p:last-child { color: var(--guide-muted); font-size: 17px; }
.investigation-card-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin-top: 34px; }
.tutorial-page-content .investigation-card,
.tutorial-page-content .investigation-card:visited { display: flex; min-height: 290px; flex-direction: column; padding: 28px; border: 1px solid var(--guide-border); border-radius: 16px; background: var(--guide-surface); color: var(--guide-text); text-decoration: none; transition: border-color .18s ease, background-color .18s ease; }
.tutorial-page-content .investigation-card:hover,
.tutorial-page-content .investigation-card:focus { border-color: rgba(94,168,255,.5); background: var(--guide-raised); color: var(--guide-text); }
.investigation-card-category { color: var(--guide-accent); font-size: 11px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.investigation-card h2 { margin: 14px 0 12px; color: #fff; font-size: 24px; line-height: 1.25; }
.investigation-card p { margin: 0; color: var(--guide-muted); font-size: 15px; line-height: 1.65; }
.investigation-card-link { margin-top: auto; padding-top: 24px; color: var(--guide-accent); font-weight: 800; }
.investigation-index-cta { margin-top: 64px; }
@media (max-width: 820px) { .investigation-layout { grid-template-columns: 1fr; gap: 0; } .investigation-toc { display: none; } .investigation-decision-grid { grid-template-columns: 1fr; } }
@media (max-width: 700px) { .investigation-card-grid { grid-template-columns: 1fr; } }
@media (max-width: 560px) { .investigation-shell { width: min(100% - 30px, 1080px); } .investigation-hero { padding: 60px 0 52px; } .investigation-meta { align-items: flex-start; flex-direction: column; } }