:root{--bg:#fbfaf7;--card:#fff;--ink:#1c2526;--muted:#5b6b6c;--brand:#0f766e;--brand2:#14b8a6;--line:#e6e2da;--soft:#ecfdf5;--warn:#fff7e6;--r:14px}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.7 system-ui,-apple-system,"Segoe UI",Roboto,Ubuntu,"Helvetica Neue",Arial,sans-serif}
a{color:var(--brand)}a:hover{color:#115e59}
.wrap{max-width:1080px;margin:0 auto;padding:0 18px}
.skip{position:absolute;left:-999px}.skip:focus{left:10px;top:10px;background:#fff;padding:8px;z-index:9}
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.hdr{display:flex;flex-wrap:wrap;align-items:center;gap:6px 18px;padding:10px 18px}
.logo{font-weight:800;font-size:1.25rem;text-decoration:none;color:var(--ink);letter-spacing:-.02em;display:flex;align-items:center;gap:8px}
.logo b{color:var(--brand)}.logo-mark{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-size:.9rem}
.nav{display:flex;gap:4px 14px;flex-wrap:nowrap;overflow-x:auto;font-size:.92rem;width:100%;padding-bottom:2px}
.nav a{text-decoration:none;color:var(--muted);white-space:nowrap}.nav a:hover{color:var(--brand)}
@media(min-width:820px){.nav{width:auto;margin-left:auto}}
main{padding:22px 18px 40px}
.hero{padding:28px 0 8px}.hero h1{font-size:clamp(1.9rem,5vw,3rem);line-height:1.15;margin:.2em 0;letter-spacing:-.03em}
.hero p{color:var(--muted);max-width:680px;font-size:1.08rem}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.chip{background:var(--soft);color:#065f46;border:1px solid #a7f3d0;padding:6px 12px;border-radius:999px;text-decoration:none;font-size:.9rem}
.section-title{font-size:1.4rem;margin:28px 0 12px}
.grid{display:grid;grid-template-columns:1fr;gap:16px}
@media(min-width:640px){.grid{grid-template-columns:1fr 1fr}}@media(min-width:960px){.grid{grid-template-columns:1fr 1fr 1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);transition:transform .15s,box-shadow .15s}
.card:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(15,118,110,.08)}
.card a{display:block;padding:18px;text-decoration:none;color:inherit;height:100%}
.card h3{font-size:1.08rem;line-height:1.35;margin:8px 0}.card p{color:var(--muted);font-size:.93rem;margin:0 0 10px;line-height:1.5}
.tag{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--brand)}.more{font-weight:600;color:var(--brand);font-size:.92rem}
.why{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:6px 22px 14px;margin-top:30px}
.ticks{padding-left:1.1em}.ticks li{margin:.3em 0}
.crumbs{font-size:.88rem;color:var(--muted);margin-bottom:8px}.crumbs a{color:var(--muted)}
.post{max-width:760px;margin:0 auto}
.post-head h1{font-size:clamp(1.75rem,4.6vw,2.5rem);line-height:1.2;letter-spacing:-.025em;margin:.2em 0 .3em}
.byline{color:var(--muted);font-size:.92rem;margin:0 0 14px}
.lead{font-size:1.13rem;color:#334142}
.prose h2{font-size:1.5rem;line-height:1.3;margin:1.8em 0 .5em;letter-spacing:-.01em;scroll-margin-top:90px}
.prose h3{font-size:1.18rem;margin:1.4em 0 .4em}
.prose li{margin:.3em 0}
.prose table{width:100%;border-collapse:collapse;font-size:.93rem;display:block;overflow-x:auto;margin:1em 0}
.prose th,.prose td{border:1px solid var(--line);padding:9px 11px;text-align:left;vertical-align:top}.prose th{background:#f3f1ec}
pre{background:#0f2424;color:#d7f5ef;padding:14px 16px;border-radius:10px;overflow-x:auto;font-size:.88rem;line-height:1.55;white-space:pre-wrap}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.9em}
:not(pre)>code{background:#eef3f1;padding:1px 6px;border-radius:5px}
.callout{background:var(--soft);border-left:4px solid var(--brand);padding:14px 16px;border-radius:10px;margin:1.2em 0}
.tip{background:var(--warn);border-left:4px solid #f59e0b;padding:12px 16px;border-radius:10px;margin:1.2em 0}
.toc{background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 16px;margin:16px 0}
.toc summary{font-weight:700;cursor:pointer}.toc ol{margin:.5em 0;padding-left:1.2em;font-size:.95rem}
.faq{background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px 14px;margin:10px 0}
.faq summary{font-weight:650;cursor:pointer}.faq p{margin:.6em 0 .2em}
.ad-slot:empty,.ad-slot{min-height:0;margin:18px 0}
.author-box{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;font-size:.94rem;margin:24px 0}
.related{max-width:1080px;margin:30px auto 0}
.small{font-size:.85rem;color:var(--muted)}
.contact-form{display:grid;gap:12px;max-width:520px}.contact-form label{display:grid;gap:4px;font-weight:600;font-size:.95rem}
.contact-form input,.contact-form textarea{font:inherit;padding:10px;border:1px solid var(--line);border-radius:8px;background:#fff}
.contact-form button{background:var(--brand);color:#fff;border:0;padding:12px 18px;border-radius:10px;font:inherit;font-weight:700;cursor:pointer;justify-self:start}
.site-footer{border-top:1px solid var(--line);background:#fff;padding:22px 0;margin-top:30px}
.foot-nav{display:flex;flex-wrap:wrap;gap:8px 16px;margin:8px 0}.foot-nav a{color:var(--muted);text-decoration:none;font-size:.92rem}