:root { --ink:#102844; --muted:#5c6d80; --line:#d6e2ea; --paper:#fff; --wash:#f2f8fb; --teal:#087f82; --teal-dark:#056467; --serif:Georgia, 'Times New Roman', serif; --sans:Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; }
* { box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { margin:0; color:var(--ink); background:var(--paper); font:16px/1.6 var(--sans); }
a { color:inherit; }
a:focus-visible, button:focus-visible { outline:3px solid #f2b84b; outline-offset:4px; }
.shell { width:min(1120px, calc(100% - 48px)); margin:0 auto; }
.skip-link { position:fixed; z-index:10; top:12px; left:12px; transform:translateY(-180%); padding:8px 12px; border-radius:4px; color:#fff; background:var(--teal-dark); font-weight:700; text-decoration:none; transition:transform .15s ease; }
.skip-link:focus { transform:translateY(0); }
.site-header { border-bottom:1px solid var(--line); background:rgba(255,255,255,.96); }
.header-inner { display:flex; min-height:72px; align-items:center; justify-content:space-between; gap:24px; }
.brand { color:var(--ink); font:700 22px/1.1 var(--serif); letter-spacing:.01em; text-decoration:none; }
.site-header nav { display:flex; gap:22px; }
.site-header nav a { color:var(--muted); font-size:.87rem; font-weight:700; text-decoration:none; }
.site-header nav a:hover { color:var(--teal-dark); }
.header-label, .eyebrow { color:var(--teal-dark); font-size:.73rem; font-weight:800; letter-spacing:.13em; text-transform:uppercase; }
.header-label { color:var(--muted); }
.hero { padding:78px 0 70px; background:linear-gradient(135deg, #f8fcfd 0%, var(--wash) 100%); border-bottom:1px solid var(--line); }
.hero-grid { display:grid; grid-template-columns:minmax(0,1.25fr) minmax(280px,.75fr); gap:64px; align-items:start; }
.eyebrow { margin:0 0 15px; }
h1, h2, h3 { color:var(--ink); font-family:var(--serif); line-height:1.12; }
h1 { max-width:700px; margin:0 0 22px; font-size:clamp(2.55rem,5vw,4.65rem); letter-spacing:-.04em; }
h2 { margin:0; font-size:clamp(1.75rem,3vw,2.5rem); letter-spacing:-.025em; }
.intro { max-width:650px; margin:0 0 30px; color:#31485f; font-size:1.12rem; }
.callout { max-width:680px; margin:0 0 38px; padding:22px 24px; border-left:4px solid var(--teal); background:rgba(255,255,255,.68); }
.callout h2, .test-details h2 { font-size:1.46rem; }
.callout p { margin:8px 0 0; color:#31485f; }
.test-details { max-width:680px; padding-top:4px; }
.test-details p { color:#31485f; }
.button { display:inline-flex; align-items:center; justify-content:center; min-height:48px; margin-top:14px; padding:11px 20px; border:1px solid var(--teal); border-radius:3px; color:#fff; background:var(--teal); font-weight:800; text-decoration:none; transition:background .15s ease, border-color .15s ease, transform .15s ease; }
.button:hover { background:var(--teal-dark); border-color:var(--teal-dark); transform:translateY(-1px); }
.button-disabled { pointer-events:none; opacity:.5; }
.steps-panel { padding:30px; border:1px solid var(--line); border-radius:4px; background:#fff; box-shadow:0 16px 35px rgba(21,58,83,.06); }
.steps-panel h2 { font-size:1.55rem; }
.steps { display:grid; gap:17px; margin:26px 0 0; padding:0; list-style:none; counter-reset:step; }
.steps li { display:grid; grid-template-columns:30px 1fr; gap:12px; align-items:start; color:#344b61; }
.steps li::before { counter-increment:step; content:counter(step); display:grid; width:26px; height:26px; place-items:center; border:1px solid #8fb9bd; border-radius:50%; color:var(--teal-dark); font-size:.76rem; font-weight:800; }
.reading { margin-top:31px; padding-top:25px; border-top:1px solid var(--line); }
.reading h3 { margin:0; font-size:1.22rem; }
.reading p { margin:8px 0 12px; color:var(--muted); font-size:1rem; }
.reading ul { margin:0; padding-left:20px; color:#344b61; font-size:1rem; }
.reading li + li { margin-top:7px; }
.reference-guide { padding:58px 0; background:var(--wash); border-bottom:1px solid var(--line); }
.guide-block { display:flex; align-items:center; justify-content:space-between; gap:32px; padding:28px 30px; border:1px solid var(--line); border-radius:4px; background:#fff; box-shadow:0 7px 17px rgba(19,52,76,.04); }
.guide-block h2 { font-size:1.68rem; }
.guide-block p { max-width:650px; margin:8px 0 0; color:var(--muted); }
.guide-block .button { flex:0 0 auto; margin:0; }
.resources { padding:78px 0 96px; }
.section-heading { display:flex; align-items:end; justify-content:space-between; gap:32px; margin-bottom:34px; }
.section-description { max-width:430px; margin:0; color:var(--muted); text-align:right; }
.video-grid { display:grid; grid-template-columns:repeat(2, minmax(0, 1fr)); gap:28px; }
.video-card { overflow:hidden; border:1px solid var(--line); border-radius:4px; background:#fff; box-shadow:0 7px 17px rgba(19,52,76,.04); }
.video-frame { position:relative; aspect-ratio:16/9; background:#dce8ee; }
.video-frame iframe { position:absolute; width:100%; height:100%; border:0; inset:0; }
.video-card-body { padding:21px 22px 23px; }
.video-card h3 { margin:0; font-size:1.34rem; }
.video-card p { margin:7px 0 0; color:var(--muted); font-size:.94rem; }
.watch-link { display:inline-block; margin-top:12px; color:var(--teal-dark); font-size:14px; font-weight:700; text-decoration:underline; text-decoration-thickness:1px; text-underline-offset:3px; }
.site-footer { padding:26px 0; border-top:1px solid var(--line); color:var(--muted); background:#f8fafb; font-size:.84rem; }
@media (max-width:760px) { .shell { width:min(100% - 32px, 1120px); } .header-inner { min-height:62px; } .site-header nav { gap:15px; } .hero { padding:54px 0 48px; } .hero-grid { grid-template-columns:1fr; gap:35px; } .steps-panel { padding:25px; } .reference-guide { padding:42px 0; } .guide-block { display:block; padding:25px; } .guide-block .button { margin-top:20px; } .resources { padding:54px 0 64px; } .section-heading { display:block; margin-bottom:27px; } .section-description { margin-top:12px; text-align:left; } .video-grid { grid-template-columns:1fr; gap:20px; } }
@media (max-width:480px) { .header-inner { padding:14px 0; flex-wrap:wrap; align-items:flex-start; } .site-header nav { width:100%; flex-wrap:wrap; gap:8px 17px; } }
@media (prefers-reduced-motion:reduce) { html { scroll-behavior:auto; } *, *::before, *::after { transition:none !important; animation:none !important; } }