:root{--navy:#08163c;--navy2:#0d2154;--blue:#1f5fbf;--purple:#6a3aa8;--teal:#2a9d8f;--red:#c0392b;--ink:#1a2340;--muted:#5a6a8a;--line:#dde5f2;--bg:#f4f7fc;--card:#ffffff}
@media (prefers-color-scheme:dark){:root{--ink:#e8edf8;--muted:#a9b6d0;--line:#26365f;--bg:#0b1430;--card:#111d42}}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:'Segoe UI',Calibri,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;font-size:17px}
a{color:var(--blue)}
@media (prefers-color-scheme:dark){a{color:#8fb4f5}}
.wrap{max-width:1000px;margin:0 auto;padding:0 20px}
header.top{background:var(--navy);color:#fff;position:sticky;top:0;z-index:20}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;padding-top:10px;padding-bottom:10px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:800;font-size:1.2rem;letter-spacing:.02em}
.brand img{width:34px;height:34px;border-radius:8px}
nav.main{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
nav.main a{color:#dbe5ff;text-decoration:none;padding:7px 12px;border-radius:8px;font-size:.95rem;font-weight:600}
nav.main a:hover,nav.main a[aria-current="page"]{background:rgba(255,255,255,.14);color:#fff}
nav.main a.cta{background:#fff;color:var(--navy);font-weight:800}
.hero{background:linear-gradient(135deg,#13307a,#08163c);color:#fff;padding:56px 0 52px}
.hero h1{font-size:clamp(1.8rem,4.6vw,2.7rem);line-height:1.15;margin:0 0 14px;font-weight:800}
.hero p{font-size:1.15rem;max-width:720px;margin:0 0 22px;color:#dbe5ff}
.hero .grid{display:grid;grid-template-columns:1.3fr .7fr;gap:30px;align-items:center}
.hero img{width:100%;max-width:300px;justify-self:center;background:#fff;border-radius:14px;padding:10px;box-shadow:0 10px 30px rgba(0,0,0,.35)}
@media (max-width:760px){.hero .grid{grid-template-columns:1fr}.hero img{max-width:220px}}
.btns{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 20px;border-radius:10px;font-weight:800;text-decoration:none;font-size:1rem;border:2px solid transparent}
.btn.primary{background:#fff;color:var(--navy)}
.btn.ghost{border-color:rgba(255,255,255,.7);color:#fff}
.btn.solid{background:var(--navy2);color:#fff}
main section{padding:38px 0}
main h2{font-size:1.6rem;color:var(--navy2);margin:0 0 12px;line-height:1.25}
@media (prefers-color-scheme:dark){main h2{color:#cfe0ff}}
main h3{font-size:1.15rem;margin:22px 0 6px}
.lead{font-size:1.1rem;color:var(--muted);max-width:760px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px;margin-top:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 18px 16px}
.card h3{margin:0 0 6px;font-size:1.05rem}
.card p{margin:0;color:var(--muted);font-size:.97rem}
.tag{display:inline-block;font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:.06em;color:var(--blue);margin-bottom:6px}
.notbox{background:#fff7e0;border:1px solid #f0c36d;border-radius:12px;padding:16px 18px;color:#6b4a00}
@media (prefers-color-scheme:dark){.notbox{background:#2d2410;border-color:#6b5320;color:#f3dca2}}
.notbox ul{margin:8px 0 0 18px;padding:0}
.steps{counter-reset:s;list-style:none;padding:0;margin:14px 0 0}
.steps li{counter-increment:s;position:relative;padding:12px 14px 12px 56px;background:var(--card);border:1px solid var(--line);border-radius:12px;margin-bottom:10px}
.steps li::before{content:counter(s);position:absolute;left:14px;top:12px;width:30px;height:30px;border-radius:50%;background:var(--navy2);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center}
.legend{display:flex;flex-wrap:wrap;gap:10px 18px;margin:12px 0}
.legend span{display:inline-flex;align-items:center;gap:8px;font-size:.95rem}
.legend i{display:inline-block;width:18px;height:18px;border-radius:4px}
table.grades{width:100%;border-collapse:collapse;background:var(--card);border-radius:12px;overflow:hidden;border:1px solid var(--line)}
table.grades th,table.grades td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top;font-size:.97rem}
table.grades th{background:var(--bg);color:var(--muted);font-size:.8rem;text-transform:uppercase;letter-spacing:.05em}
details{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin-bottom:10px}
details summary{cursor:pointer;font-weight:700}
details p{margin:8px 0 0;color:var(--muted)}
.cite{background:var(--card);border-left:5px solid var(--blue);border-radius:8px;padding:14px 16px;font-size:.98rem}
footer.site{background:var(--navy);color:#cbd6f2;padding:30px 0;margin-top:30px;font-size:.92rem}
footer.site a{color:#fff}
footer.site .cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:20px}
footer.site small{display:block;margin-top:18px;color:#93a3cc}
.skip{position:absolute;left:-999px}.skip:focus{left:10px;top:10px;background:#fff;color:#000;padding:8px;z-index:50}