:root{--ink:#152238;--muted:#5f6b7a;--line:#dfe5ec;--bg:#f6f9fc;--card:#fff;--brand:#0b6bcb;--accent:#0a7a55;--warn:#8a5b00}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg);line-height:1.68}
a{color:#075fae;text-underline-offset:3px}a:hover{text-decoration-thickness:2px}.wrap{width:min(1120px,92vw);margin:auto}.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}.nav{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:68px}.brand{font-weight:800;font-size:1.25rem;text-decoration:none;color:var(--ink)}.nav-links{display:flex;gap:18px;flex-wrap:wrap}.nav-links a{text-decoration:none;font-weight:650;font-size:.95rem}
.hero{padding:54px 0 30px;background:linear-gradient(180deg,#fff 0,#f6f9fc 100%)}.eyebrow{font-size:.86rem;font-weight:800;letter-spacing:.07em;text-transform:uppercase;color:var(--accent)}h1{font-size:clamp(2rem,4.4vw,3.8rem);line-height:1.08;letter-spacing:-.035em;margin:.35rem 0 1rem;max-width:900px}h2{font-size:clamp(1.45rem,2.4vw,2rem);line-height:1.2;margin:2.2rem 0 .8rem}h3{font-size:1.15rem;line-height:1.3;margin:1.35rem 0 .45rem}.lede{font-size:1.15rem;color:#344156;max-width:900px}.meta{display:flex;gap:16px;flex-wrap:wrap;color:var(--muted);font-size:.92rem}.grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;padding:28px 0 56px}.card,.answer,.notice,.toc{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px}.answer{border-left:5px solid var(--brand);box-shadow:0 10px 30px rgba(22,48,77,.06)}.answer strong{display:block;margin-bottom:6px}.notice{border-left:5px solid var(--warn);background:#fffaf0}.toc{position:sticky;top:88px}.toc strong{display:block;margin-bottom:10px}.toc ol{padding-left:20px;margin:0}.toc li{margin:.45rem 0}.content section{scroll-margin-top:88px}.checklist{padding-left:1.2rem}.checklist li,.steps li{margin:.65rem 0}.steps{counter-reset:step;list-style:none;padding:0}.steps li{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px 14px 54px;position:relative}.steps li:before{counter-increment:step;content:counter(step);position:absolute;left:15px;top:14px;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:#e9f3ff;color:#075fae;font-weight:800}.table-wrap{overflow:auto}.diag{width:100%;border-collapse:collapse;background:#fff}.diag th,.diag td{border:1px solid var(--line);padding:12px;text-align:left;vertical-align:top}.diag th{background:#edf5ff}.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:13px 15px;margin:10px 0}.faq summary{font-weight:750;cursor:pointer}.faq p{margin:.7rem 0 .2rem}.sources li{margin:.65rem 0}.tagrow{display:flex;gap:8px;flex-wrap:wrap}.tag{display:inline-block;padding:5px 9px;border-radius:999px;background:#edf5ff;border:1px solid #d6e8fb;font-size:.82rem}.footer{background:#101b2c;color:#e9eef6;padding:34px 0}.footer a{color:#fff}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px}.small{font-size:.9rem;color:#697587}.footer .small{color:#c4ccd8}.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:12px;background:#fff;padding:10px;z-index:99}
@media(max-width:860px){.grid{grid-template-columns:1fr}.toc{position:static}.nav{align-items:flex-start;padding:14px 0}.nav-links{justify-content:flex-end}.footer-grid{grid-template-columns:1fr}}
/* Priority internal-link highlight and low-motion animation */
.priority-links{list-style:none;padding:0;margin:1rem 0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.priority-links li{margin:0}
.animated-keyword-link{display:block;padding:13px 15px;border:1px solid #cfe3f8;border-radius:12px;background:linear-gradient(90deg,#eef7ff,#fffbe8,#eef7ff);background-size:220% 100%;text-decoration:none;box-shadow:0 6px 18px rgba(22,48,77,.06);animation:keywordGlow 5s ease-in-out infinite}
.animated-keyword-link:hover{transform:translateY(-1px);box-shadow:0 9px 22px rgba(22,48,77,.10)}
.keyword-highlight{background:linear-gradient(transparent 58%,#fff0a8 58%);padding:0 .12em}
.product-rating-card{background:#fff;border:1px solid var(--line);border-left:5px solid var(--accent);border-radius:14px;padding:18px 20px}
@keyframes keywordGlow{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}
@media(max-width:720px){.priority-links{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){.animated-keyword-link{animation:none;transition:none}}