:root{
  --bg:#0b1f24; --bg2:#0f2a30; --card:#133038; --line:#1f4650;
  --text:#e8f3f4; --muted:#9db8bc; --accent:#ffb020; --accent2:#2dd4bf; --warn:#ff6b5b;
  --r:18px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Cairo',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.9;font-size:17px;
  background-image:radial-gradient(900px 500px at 85% -10%,rgba(45,212,191,.14),transparent 60%),radial-gradient(700px 400px at 0% 20%,rgba(255,176,32,.08),transparent 60%)}
a{color:inherit;text-decoration:none}
.wrap{width:min(1120px,100% - 32px);margin-inline:auto}
.skip{position:absolute;inset-inline-start:-999px}
.skip:focus{inset-inline-start:8px;top:8px;background:var(--accent);color:#000;padding:6px 12px;border-radius:8px;z-index:99}

/* header */
header{position:sticky;top:0;z-index:50;background:rgba(11,31,36,.85);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px}
.brand img{width:40px;height:40px;border-radius:10px}
.brand small{display:block;font-weight:400;font-size:12px;color:var(--muted);line-height:1.2}
nav ul{display:flex;gap:6px;list-style:none}
nav a{padding:8px 14px;border-radius:10px;color:var(--muted);font-weight:600;font-size:15px}
nav a:hover,nav a.on{background:var(--card);color:var(--text)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:14px;font-weight:700;border:0;cursor:pointer;font-family:inherit;font-size:16px;transition:transform .15s}
.btn:hover{transform:translateY(-2px)}
.btn-main{background:linear-gradient(135deg,var(--accent),#ff8a1f);color:#1a1000}
.btn-ghost{background:transparent;border:1.5px solid var(--line);color:var(--text)}
.menu-btn{display:none;background:var(--card);color:var(--text);border:1px solid var(--line);border-radius:10px;padding:8px 14px;font-family:inherit;font-size:16px;cursor:pointer}

/* hero */
.hero{padding:64px 0 40px;display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
.tag{display:inline-block;background:rgba(45,212,191,.12);color:var(--accent2);border:1px solid rgba(45,212,191,.35);padding:4px 14px;border-radius:99px;font-size:14px;font-weight:600;margin-bottom:16px}
h1{font-size:clamp(28px,4.2vw,46px);line-height:1.4;font-weight:800;margin-bottom:16px}
h1 span{color:var(--accent)}
.lead{color:var(--muted);margin-bottom:26px;max-width:60ch}
.cta{display:flex;flex-wrap:wrap;gap:12px}
.infocard{background:linear-gradient(160deg,var(--card),var(--bg2));border:1px solid var(--line);border-radius:var(--r);padding:26px;box-shadow:0 20px 60px rgba(0,0,0,.35)}
.infocard .top{display:flex;align-items:center;gap:14px;margin-bottom:16px;padding-bottom:16px;border-bottom:1px dashed var(--line)}
.infocard .top img{width:64px;height:64px;border-radius:16px}
.infocard h2{font-size:20px}
.infocard dl{display:grid;grid-template-columns:auto 1fr;gap:8px 16px;font-size:15px}
.infocard dt{color:var(--muted)}
.infocard dd{font-weight:700}

/* sections */
section{padding:44px 0}
.sec-head{margin-bottom:26px}
.sec-head .n{color:var(--accent);font-weight:800;font-size:14px;letter-spacing:1px}
.sec-head h2{font-size:clamp(24px,3vw,32px);line-height:1.5}
p.txt{color:var(--muted);margin-bottom:14px;max-width:80ch}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;transition:border-color .2s,transform .2s}
.card:hover{border-color:var(--accent2);transform:translateY(-3px)}
.card h3{font-size:18px;margin-bottom:6px;display:flex;gap:10px;align-items:center}
.card h3 i{font-style:normal;display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:rgba(45,212,191,.14);color:var(--accent2);font-size:16px}
.card p{color:var(--muted);font-size:15px;line-height:1.8}
.list{list-style:none;display:grid;gap:10px;margin:10px 0 0}
.list li{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:10px 16px;display:flex;gap:10px}
.list li::before{content:"◆";color:var(--accent);font-size:12px;margin-top:6px}
.two{display:grid;gap:20px;grid-template-columns:1fr 1fr}
.alert{background:rgba(255,107,91,.08);border:1px solid rgba(255,107,91,.4);border-radius:var(--r);padding:20px 24px}
.alert strong{color:var(--warn)}
.steps{counter-reset:s;display:grid;gap:14px}
.steps li{list-style:none;counter-increment:s;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px 20px 16px 20px;display:flex;gap:16px;align-items:flex-start}
.steps li::before{content:counter(s);flex:none;width:36px;height:36px;border-radius:50%;background:var(--accent);color:#1a1000;font-weight:800;display:grid;place-items:center}
.steps b{display:block}
.steps span{color:var(--muted);font-size:15px}

details{background:var(--card);border:1px solid var(--line);border-radius:14px;margin-bottom:10px;overflow:hidden}
summary{cursor:pointer;padding:16px 20px;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:12px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--accent);font-size:22px;line-height:1}
details[open] summary::after{content:"–"}
details div{padding:0 20px 16px;color:var(--muted);font-size:15px}

.banner{background:linear-gradient(135deg,#123c43,#0f2a30);border:1px solid var(--line);border-radius:24px;padding:34px;text-align:center}
.banner h2{margin-bottom:8px}
.banner p{color:var(--muted);margin-bottom:20px}

footer{border-top:1px solid var(--line);margin-top:30px;padding:30px 0;color:var(--muted);font-size:14px}
footer .row{display:flex;flex-wrap:wrap;justify-content:space-between;gap:14px}
footer ul{list-style:none;display:flex;flex-wrap:wrap;gap:16px}
footer a:hover{color:var(--text)}
.note{margin-top:16px;font-size:13px;line-height:1.8}

@media(max-width:860px){
  .hero,.two{grid-template-columns:1fr}
  .menu-btn{display:block}
  nav{position:absolute;inset-inline:0;top:68px;background:var(--bg);border-bottom:1px solid var(--line);display:none}
  nav.open{display:block}
  nav ul{flex-direction:column;padding:12px 16px}
  .bar>.btn{display:none}
}

/* inner pages */
.crumbs{padding:22px 0 0;font-size:14px;color:var(--muted)}
.crumbs a:hover{color:var(--text)}
.page-hero{padding:18px 0 10px}
.page-hero h1{font-size:clamp(26px,3.6vw,40px);margin-bottom:10px}
.page-hero p{color:var(--muted);max-width:70ch}
.prose{max-width:820px}
.prose h2{font-size:clamp(22px,2.6vw,28px);margin:34px 0 10px;line-height:1.5}
.prose h3{font-size:18px;margin:22px 0 6px;color:var(--accent2)}
.prose p{color:var(--muted);margin-bottom:12px}
.prose ul,.prose ol{margin:8px 22px 14px 0;color:var(--muted)}
.prose li{margin-bottom:6px}
.prose a{color:var(--accent)}
.prose a:hover{text-decoration:underline}
code{background:var(--bg2);border:1px solid var(--line);padding:1px 8px;border-radius:8px;font-size:14px;direction:ltr;unicode-bidi:embed}
.hash{display:block;margin:10px 0 16px;padding:12px 16px;word-break:break-all;direction:ltr;text-align:left;font-size:13px}
.dlbox{background:linear-gradient(160deg,var(--card),var(--bg2));border:1px solid var(--line);border-radius:var(--r);padding:26px;margin:18px 0}
.dlbox .btn{margin:8px 0}
.kv{display:grid;grid-template-columns:auto 1fr;gap:8px 18px;font-size:15px;margin-top:10px}
.kv dt{color:var(--muted)}
.kv dd{font-weight:700;word-break:break-word}
.pad{padding-bottom:30px}