* { margin: 0; padding: 0; box-sizing: border-box; }
:root { --teal:#00BFB3; --teal-dark:#00A199; --ink:#1A202C; --body:#2D3748; --muted:#718096; --line:#E2E8F0; --wash:#F7FAFC; }
body { font-family:'Montserrat',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif; line-height:1.65; color:var(--body); background:#fff; -webkit-font-smoothing:antialiased; }
.container { max-width:900px; margin:0 auto; padding:0 20px; }
a { color:var(--teal-dark); }
.hero { background:var(--ink); color:#fff; padding:56px 0 44px; }
.hero .eyebrow { font-size:13px; letter-spacing:1.6px; text-transform:uppercase; color:var(--teal); font-weight:700; margin-bottom:12px; }
.hero h1 { font-size:38px; font-weight:800; line-height:1.15; margin-bottom:14px; color:#fff; }
.hero p { font-size:18px; color:#CBD5E0; max-width:680px; }
.hero .meta { margin-top:18px; font-size:14px; color:#A0AEC0; }
.hero .meta strong { color:#fff; }
main { padding:44px 0 10px; }
section { margin-bottom:44px; }
h2 { font-size:27px; font-weight:800; color:var(--ink); line-height:1.25; margin:0 0 14px; }
h3 { font-size:20px; font-weight:700; color:var(--ink); margin:26px 0 10px; }
p { margin-bottom:16px; }
ul, ol { margin:0 0 16px 22px; }
li { margin-bottom:8px; }
.answer { background:var(--wash); border-left:4px solid var(--teal-dark); padding:18px 22px; border-radius:0 8px 8px 0; margin-bottom:26px; font-size:17px; }
.answer strong { color:var(--ink); }
.figure { margin:24px 0 30px; padding:22px; border:1px solid var(--line); border-radius:10px; background:#fff; }
.figure h4 { font-size:16px; font-weight:700; color:var(--ink); margin-bottom:4px; }
.figure .sub { font-size:13px; color:var(--muted); margin-bottom:16px; }
.lri-chart { width:100%; height:auto; display:block; }
.lri-tablewrap { overflow-x:auto; margin-top:16px; }
.lri-table { width:100%; border-collapse:collapse; font-size:14px; }
.lri-table caption { text-align:left; font-size:13px; color:var(--muted); padding-bottom:8px; }
.lri-table th, .lri-table td { text-align:left; padding:9px 12px; border-bottom:1px solid var(--line); color:var(--body); }
.lri-table td strong { color:var(--ink); }
.lri-table th { font-weight:700; color:var(--ink); background:var(--wash); }
.lri-table td:not(:first-child), .lri-table th:not(:first-child) { text-align:right; }
.cite { background:var(--ink); color:#CBD5E0; border-radius:10px; padding:22px 24px; margin:28px 0; font-size:14px; }
.cite h4 { color:#fff; font-size:15px; font-weight:700; margin-bottom:10px; letter-spacing:.3px; }
.cite code, .cite .snippet { display:block; background:#0F1319; color:#E2E8F0; border-radius:6px; padding:12px 14px; font-family:ui-monospace,SFMono-Regular,Menlo,monospace; font-size:12.5px; line-height:1.55; overflow-x:auto; white-space:pre-wrap; word-break:break-word; margin-bottom:10px; }
.cite p { margin-bottom:10px; }
.cite a { color:var(--teal); }
.callout { border:1px solid var(--line); border-radius:10px; padding:20px 22px; background:var(--wash); margin:22px 0; }
.callout.warn { border-left:4px solid #B7791F; background:#FFFAF0; }
.chapters { list-style:none; margin:0; padding:0; }
.chapters li { border:1px solid var(--line); border-radius:10px; padding:18px 20px; margin-bottom:12px; }
.chapters a { font-weight:700; font-size:18px; text-decoration:none; }
.chapters .n { font-size:13px; color:var(--muted); display:block; margin-top:4px; }
.keyfig { display:flex; flex-wrap:wrap; gap:14px; margin:22px 0 28px; }
.keyfig > div { flex:1 1 180px; border:1px solid var(--line); border-radius:10px; padding:16px 18px; }
.keyfig .v { font-size:30px; font-weight:800; color:var(--ink); line-height:1.1; }
.keyfig .l { font-size:13px; color:var(--muted); margin-top:6px; }
details { border:1px solid var(--line); border-radius:8px; padding:14px 18px; margin-bottom:10px; }
summary { font-weight:700; color:var(--ink); cursor:pointer; }
details p { margin:12px 0 0; }
.next { border-top:1px solid var(--line); padding-top:24px; margin-top:8px; }
.byline { font-size:14px; color:var(--muted); border-top:1px solid var(--line); padding-top:18px; margin-top:8px; }
.crumb { font-size:13px; color:var(--muted); margin-bottom:26px; }
.crumb a { color:var(--muted); }
footer { background:var(--ink); color:#A0AEC0; text-align:center; padding:44px 0 34px; margin-top:50px; font-size:13px; }
footer p { margin:6px 0; }
footer a { color:#CBD5E0; }
.final-cta { margin-bottom:22px; }
.cta-btn { display:inline-block; background:linear-gradient(135deg,var(--teal) 0%,var(--teal-dark) 100%); color:#fff; text-decoration:none; font-weight:700; padding:18px 40px; border-radius:50px; font-size:17px; letter-spacing:.4px; line-height:1.3; }
.cta-btn small { display:block; font-size:12px; font-weight:600; opacity:.9; letter-spacing:1px; margin-top:3px; }
@media (max-width:640px){ .hero h1{font-size:29px;} h2{font-size:23px;} .hero{padding:40px 0 34px;} }