:root {
  --ink: #10233f;
  --muted: #5f6f82;
  --ocean: #087f8c;
  --ocean-dark: #075d68;
  --aqua: #dff7f4;
  --sand: #fff8e8;
  --paper: #fbfcfd;
  --line: #dfe7ec;
  --radius: 22px;
  --shadow: 0 20px 60px rgba(16, 35, 63, .10);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font: 17px/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
a { color: inherit; }
.site-header { max-width: 1180px; margin: auto; min-height: 82px; padding: 18px 24px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { text-decoration: none; font-weight: 800; letter-spacing: -.03em; font-size: 1.25rem; }
.brand span { display: inline-grid; place-items: center; width: 34px; height: 34px; margin-right: 8px; border-radius: 12px; color: white; background: var(--ocean); }
nav { display: flex; gap: 24px; }
nav a { text-decoration: none; color: var(--muted); font-size: .94rem; font-weight: 650; }
nav a:hover, nav a:focus-visible { color: var(--ocean-dark); }
.menu-button { display: none; border: 1px solid var(--line); background: white; padding: 10px 14px; border-radius: 12px; color: var(--ink); font: inherit; font-weight: 700; }
.hero { position: relative; overflow: hidden; max-width: 1180px; min-height: 480px; margin: 10px auto 50px; padding: 80px clamp(28px, 7vw, 90px); border-radius: 36px; background: linear-gradient(135deg, var(--aqua), #edf8ff 55%, var(--sand)); box-shadow: var(--shadow); }
.hero::after { content: ""; position: absolute; width: 330px; height: 330px; right: -70px; bottom: -100px; border: 48px solid rgba(8,127,140,.11); border-radius: 50%; }
.eyebrow, .section-label { color: var(--ocean-dark); font-size: .76rem; font-weight: 850; letter-spacing: .13em; text-transform: uppercase; }
h1 { max-width: 850px; margin: 12px 0 20px; font-size: clamp(2.6rem, 7vw, 5.8rem); line-height: .98; letter-spacing: -.065em; }
.lead { max-width: 680px; color: #314b65; font-size: clamp(1.08rem, 2vw, 1.35rem); }
.review-date { position: relative; z-index: 1; margin: 22px 0 0; color: var(--ocean-dark); font-size: .86rem; font-weight: 700; }
.notice { position: relative; z-index: 1; display: inline-block; max-width: 650px; margin-top: 28px; padding: 14px 18px; border: 1px solid rgba(8,127,140,.24); border-radius: 14px; background: rgba(255,255,255,.7); font-size: .9rem; }
.content-shell { max-width: 1000px; margin: 0 auto 80px; padding: 0 24px; display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 56px; }
.article-body { max-width: 860px; min-width: 0; margin: 0 auto 90px; padding: 0 24px; overflow-wrap: anywhere; }
.article-toc { margin: 0 0 38px; padding: 20px 24px; border: 1px solid var(--line); border-radius: 18px; background: white; }
.article-toc summary { cursor: pointer; color: var(--ink); font-weight: 800; }
.article-toc ol { margin: 16px 0 0; padding-left: 22px; columns: 2; column-gap: 36px; }
.article-toc li { break-inside: avoid; margin: 5px 0; }
.article-toc a { font-size: .94rem; }
.article-body h2 { margin-top: 3.2rem; scroll-margin-top: 24px; }
.article-body h3 { margin: 2.2rem 0 .7rem; font-size: 1.35rem; line-height: 1.25; }
.article-body p, .article-body li { color: #314b65; }
.article-body a { color: var(--ocean-dark); text-underline-offset: 3px; }
.article-body img { display: block; width: min(100%, 760px); height: auto; margin: 32px auto 10px; border: 1px solid var(--line); border-radius: var(--radius); background: #f4fbfc; box-shadow: 0 14px 38px rgba(16, 35, 63, .08); }
.article-body p > em:only-child { display: block; color: var(--muted); font-size: .88rem; line-height: 1.5; text-align: center; }
.article-body blockquote { margin: 28px 0; padding: 18px 22px; border-left: 4px solid var(--ocean); background: var(--aqua); }
.article-body table { width: 100%; border-collapse: collapse; display: block; overflow-x: auto; margin: 24px 0 34px; font-size: .92rem; }
.article-body th, .article-body td { min-width: 150px; padding: 12px 14px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.article-body th { background: var(--aqua); color: var(--ink); }
.article-body hr { margin: 48px 0; border: 0; border-top: 1px solid var(--line); }
.affiliate-cta { margin: 28px 0 36px; padding: 24px; border-color: rgba(8,127,140,.3); background: var(--aqua); }
.article-body .affiliate-disclosure { margin: 0 0 16px; color: var(--ink); font-size: .94rem; }
.article-body .affiliate-button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; padding: 12px 20px; border-radius: 12px; background: var(--ocean-dark); color: white; font-weight: 800; text-decoration: none; }
.article-body .affiliate-button:hover, .article-body .affiliate-button:focus-visible { background: var(--ink); color: white; }
.article-body .affiliate-check { margin: 14px 0 0; color: var(--muted); font-size: .82rem; line-height: 1.45; }
.faq-section { margin-top: 56px; }
.faq-item { margin: 12px 0; border: 1px solid var(--line); border-radius: 14px; background: white; }
.faq-item summary { cursor: pointer; padding: 16px 18px; color: var(--ink); font-weight: 780; }
.faq-item p { margin: 0; padding: 0 18px 18px; }
.data-calculator { margin: 30px 0 42px; padding: clamp(22px, 5vw, 38px); border: 1px solid rgba(8,127,140,.28); border-radius: 28px; background: white; box-shadow: var(--shadow); }
.data-calculator fieldset { min-width: 0; margin: 0; padding: 0; border: 0; }
.data-calculator legend { margin-bottom: 20px; font-size: 1.3rem; font-weight: 800; color: var(--ink); }
.data-calculator__fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.data-calculator__fields label { display: flex; min-width: 0; flex-direction: column; gap: 6px; color: var(--ink); font-size: .95rem; font-weight: 750; }
.data-calculator__fields label span { color: var(--muted); font-size: .78rem; font-weight: 550; }
.data-calculator__fields input { width: 100%; min-height: 48px; padding: 9px 12px; border: 1px solid #b7c8d3; border-radius: 11px; background: var(--paper); color: var(--ink); font: inherit; }
.data-calculator__fields input:focus { border-color: var(--ocean); }
.data-calculator__result { margin: 28px 0 20px; padding: 24px; border-radius: 20px; background: var(--aqua); text-align: center; }
.article-body .data-calculator__result p { margin: 0; color: var(--ocean-dark); font-weight: 700; }
.data-calculator__result output { display: block; margin: 2px 0 5px; color: var(--ink); font-size: clamp(2.35rem, 8vw, 4.4rem); font-weight: 850; line-height: 1.1; letter-spacing: -.05em; }
.data-calculator__assumptions { padding-top: 4px; border-top: 1px solid var(--line); }
.article-body .data-calculator__assumptions p { margin: 12px 0 0; color: var(--muted); font-size: .86rem; line-height: 1.5; }
.directory { max-width: 1180px; margin: 0 auto 90px; padding: 0 24px; scroll-margin-top: 24px; }
.directory h2 { max-width: 760px; }
.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 28px; }
.card { min-height: 210px; padding: 24px; display: flex; flex-direction: column; gap: 11px; border: 1px solid var(--line); border-radius: var(--radius); background: white; text-decoration: none; transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease; }
.card:hover, .card:focus-visible { transform: translateY(-3px); border-color: rgba(8,127,140,.45); box-shadow: var(--shadow); }
.card span { color: var(--ocean-dark); font-size: .72rem; font-weight: 850; letter-spacing: .1em; text-transform: uppercase; }
.card strong { font-size: 1.18rem; line-height: 1.25; }
.card small { color: var(--muted); font-size: .9rem; line-height: 1.5; }
.method { max-width: 1000px; padding: 44px; border-radius: 28px; background: var(--ink); color: white; }
.method .section-label { color: #85e6dc; }
.method p:last-child { max-width: 760px; color: #d7e1ea; }
h2 { margin: 8px 0 16px; font-size: clamp(1.8rem, 4vw, 3rem); line-height: 1.1; letter-spacing: -.04em; }
aside { align-self: start; padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: white; }
aside ul { padding-left: 20px; }
footer { padding: 36px 24px; border-top: 1px solid var(--line); color: var(--muted); text-align: center; font-size: .86rem; }
.footer-links { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px 20px; }
.footer-links a:hover, .footer-links a:focus-visible { color: var(--ocean-dark); }
:focus-visible { outline: 3px solid #f2a900; outline-offset: 3px; }
@media (max-width: 760px) {
  .site-header { align-items: flex-start; flex-wrap: wrap; }
  .menu-button { display: block; }
  nav { display: none; flex-basis: 100%; flex-direction: column; gap: 6px; padding: 10px 0; }
  nav[data-open="true"] { display: flex; }
  nav a { padding: 10px 2px; }
  .hero { min-height: 0; margin: 0 14px 36px; padding: 54px 24px; border-radius: 26px; }
  .hero::after { width: 220px; height: 220px; }
  .content-shell { grid-template-columns: 1fr; gap: 28px; }
  .article-toc ol { columns: 1; }
  .data-calculator__fields { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: 1fr; }
  .card { min-height: 0; }
  .method { margin-left: 14px; margin-right: 14px; padding: 30px 24px; }
}