:root{--bg:#f4f8f9;--surface:#fff;--ink:#0f2b31;--muted:#5b7a80;--teal:#0e7490;--teal-d:#155e75;--mint:#5eead4;--mint-d:#0d9488;--line:#dbe8ea;--good:#12a150;--shadow:0 10px 30px -12px rgba(14,116,144,.28);--radius:16px;--maxw:820px}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Inter","Segoe UI",system-ui,sans-serif;line-height:1.7;-webkit-font-smoothing:antialiased}
h1,h2,h3{font-family:"Plus Jakarta Sans","Inter",system-ui,sans-serif;line-height:1.18;letter-spacing:-.4px}
h1{font-size:clamp(28px,5vw,42px);margin:0 0 14px}
h2{font-size:clamp(22px,3.4vw,30px);margin:34px 0 10px}
h3{font-size:19px;margin:22px 0 6px}
p,li{font-size:17px}
a{color:var(--teal);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.wide{max-width:1120px}
header{position:sticky;top:0;z-index:50;background:rgba(244,248,249,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:900;color:var(--ink)}
.logo{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--teal),var(--teal-d));color:#fff;display:grid;place-items:center;font-weight:900}
.brand b{color:var(--teal)}
.btn{display:inline-flex;align-items:center;gap:8px;border:0;cursor:pointer;font:inherit;font-weight:800;border-radius:12px;padding:12px 20px;font-size:16px;background:var(--mint);color:var(--teal-d);box-shadow:0 8px 20px -8px rgba(13,148,136,.5)}
.hero{background:radial-gradient(1000px 400px at 90% -10%,rgba(94,234,212,.18),transparent 60%),linear-gradient(160deg,#0e7490,#155e75 60%,#0c4a56);color:#fff;padding:40px 0}
.hero .wrap{max-width:var(--maxw)}
.hero h1{color:#fff}
.hero .crumbs{font-size:13px;color:#bfeef0;margin-bottom:8px}
.hero .crumbs a{color:#bfeef0}
.hero .sub{color:#dff5f4;font-size:18px;max-width:60ch}
article{padding:34px 0 10px}
article .updated{color:var(--muted);font-size:14px;margin-bottom:8px}
table{width:100%;border-collapse:collapse;margin:16px 0;background:var(--surface);border:1px solid var(--line);border-radius:12px;overflow:hidden}
th,td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);font-size:15.5px}
th{background:#eaf6f7;font-family:"Plus Jakarta Sans";color:var(--teal-d)}
td .save{color:var(--good);font-weight:800}
.callout{background:#eaf6f7;border:1px solid var(--line);border-left:4px solid var(--mint-d);border-radius:12px;padding:16px 18px;margin:20px 0}
.ctaband{background:linear-gradient(160deg,#0e7490,#0c4a56);color:#fff;border-radius:var(--radius);padding:26px;text-align:center;margin:34px 0;box-shadow:var(--shadow)}
.ctaband h2{color:#fff;margin:0 0 6px}
.ctaband p{color:#dff5f4;margin:0 0 16px}
details{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:2px 18px;margin-bottom:12px;box-shadow:var(--shadow)}
summary{cursor:pointer;font-weight:800;font-family:"Plus Jakarta Sans";font-size:16.5px;padding:15px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--teal);font-size:24px;font-weight:800}
details[open] summary::after{content:"–"}
details p{margin:0 0 15px;color:var(--muted)}
.related{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:18px 0}
.related a{display:block;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px 16px;font-weight:700;box-shadow:var(--shadow)}
footer{background:#0b3a44;color:#bfe3e6;padding:28px 0;font-size:14px;margin-top:30px}
footer a{color:var(--mint)}
.disc{color:#7fb3ba;font-size:12px;margin-top:10px}
@media(max-width:560px){.related{grid-template-columns:1fr}}