:root{--p:#0b6e6e;--p2:#0f8f8a;--d:#0d2b33;--t:#24343a;--m:#5b6b70;--bg:#f6faf9;--c:#fff;--b:#dde8e6;--a:#e8f4f2;--w:#25d366;--r:14px}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;overflow-x:hidden;font-family:Cairo,Inter,system-ui,-apple-system,"Segoe UI",Tahoma,sans-serif;color:var(--t);background:var(--bg);line-height:1.9;font-size:17px}
html[dir=ltr] body{font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.75}
a{color:var(--p)}img{max-width:100%;height:auto}
.wrap{max-width:1200px;margin:0 auto;padding:0 16px}
.skip{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}.skip:focus{width:auto;height:auto;clip:auto;top:8px;inset-inline-start:8px;background:#fff;padding:6px;z-index:99}
.top{background:var(--c);border-bottom:1px solid var(--b);position:sticky;top:0;z-index:20}
.bar{display:flex;align-items:center;gap:12px;height:62px}
.logo{display:flex;align-items:center;gap:8px;text-decoration:none;color:var(--d);font-weight:800;font-size:1.35rem;margin-inline-end:auto}
.langs,.menu{position:relative}
.langs summary,.menu summary{list-style:none;cursor:pointer;border:1px solid var(--b);border-radius:10px;padding:4px 12px;font-size:.9rem;background:var(--c);white-space:nowrap}
.langs summary::-webkit-details-marker,.menu summary::-webkit-details-marker{display:none}
.langs nav,.mnav{position:absolute;inset-inline-end:0;top:115%;background:var(--c);border:1px solid var(--b);border-radius:12px;padding:8px;display:flex;flex-direction:column;min-width:190px;box-shadow:0 10px 30px #0002}
.langs nav a,.mnav a{padding:6px 10px;text-decoration:none;color:var(--t);border-radius:8px;font-size:.92rem}
.langs nav a:hover,.mnav a:hover,.langs nav a.on{background:var(--a)}
.mnav{max-height:70vh;overflow:auto}.mnav b{font-size:.8rem;color:var(--m);padding:6px 10px 2px}
.typesnav{display:flex;gap:6px;overflow-x:auto;padding-bottom:10px;scrollbar-width:none}
.typesnav a{white-space:nowrap;text-decoration:none;color:var(--d);background:var(--a);border-radius:999px;padding:3px 14px;font-size:.88rem}
.typesnav a.on,.typesnav a:hover{background:var(--p);color:#fff}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;padding-top:22px;padding-bottom:30px}
.post{background:var(--c);border:1px solid var(--b);border-radius:var(--r);padding:28px 34px;min-width:0}
.bc{font-size:.85rem;color:var(--m)}.bc a{color:var(--m);text-decoration:none}.bc span{margin:0 4px}
.hero-tag{display:inline-block;margin-top:12px;background:var(--a);color:var(--p);font-weight:700;border-radius:999px;padding:2px 14px;font-size:.88rem}
h1{font-size:2.3rem;line-height:1.35;color:var(--d);margin:.4em 0 .3em}
.home h1{font-size:2.8rem}
.lead{font-size:1.15rem;color:#33474d;margin:.2em 0 1em}
.metarow{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:.86rem;color:var(--m);border-block:1px solid var(--b);padding:8px 0;margin-bottom:18px}
.toc{background:var(--a);border-radius:12px;padding:12px 18px;margin:16px 0 22px}
.toc summary{font-weight:700;cursor:pointer;color:var(--d)}
.toc ul{margin:6px 0;padding-inline-start:20px}.toc li{margin:2px 0}.toc a{text-decoration:none;font-size:.95rem}
.content h2{font-size:1.6rem;color:var(--d);margin:1.6em 0 .5em;line-height:1.4;padding-inline-start:12px;border-inline-start:4px solid var(--p2);scroll-margin-top:120px}
.content h3{font-size:1.25rem;color:var(--d);margin:1.3em 0 .4em;scroll-margin-top:120px}
.content li{margin:4px 0}
.content blockquote{margin:1.2em 0;background:#fff7e6;border-inline-start:4px solid #f0a020;padding:10px 18px;border-radius:10px}
.content blockquote.alert,.content .alert{background:#fdecec;border-color:#d33}
.tw{overflow-x:auto;margin:1em 0}
table{border-collapse:collapse;width:100%;font-size:.95rem;min-width:520px}
th,td{border:1px solid var(--b);padding:8px 10px;text-align:start;vertical-align:top}
th{background:var(--a);color:var(--d)}
tr:nth-child(even) td{background:#fafdfc}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px;margin:18px 0}
.card{display:flex;flex-direction:column;gap:4px;padding:16px;border:1px solid var(--b);border-radius:12px;text-decoration:none;color:var(--t);background:linear-gradient(180deg,#fff,#f3faf8);transition:.2s}
.card:hover{border-color:var(--p2);transform:translateY(-2px);box-shadow:0 8px 20px #0b6e6e1a}
.card strong{color:var(--d);font-size:1.05rem}.card small{color:var(--m);line-height:1.6}
.card-ic{width:30px;height:30px;border-radius:50%;background:var(--p);color:#fff;display:grid;place-items:center;font-weight:800;font-size:.9rem}
.diagram{margin:18px auto;max-width:420px;text-align:center}
.diagram svg{width:100%;height:auto}
.diagram .body{fill:#e5f2ef;stroke:#9cc9c1;stroke-width:2}.diagram .body2{fill:none;stroke:#b7d8d2;stroke-width:1.5}
.diagram .dl{stroke:var(--p2);stroke-width:1;stroke-dasharray:3 3}.diagram .dp{fill:#e4572e;stroke:#fff;stroke-width:2}
.diagram .dt{font-size:12.5px;fill:var(--d);font-weight:700;font-family:Cairo,Inter,sans-serif}
.diagram a:hover .dt{fill:var(--p)}
.diagram figcaption{font-size:.85rem;color:var(--m)}
.cta{display:flex;gap:18px;align-items:center;justify-content:space-between;flex-wrap:wrap;background:linear-gradient(135deg,var(--p),#0a4f57);color:#fff;border-radius:var(--r);padding:22px 26px;margin:30px 0}
.cta h2{margin:0;font-size:1.4rem;color:#fff}.cta p{margin:.3em 0 0;opacity:.92}
.cta-b{display:flex;gap:10px;flex-wrap:wrap}
.btn{display:inline-block;border-radius:999px;padding:9px 22px;font-weight:700;text-decoration:none;text-align:center}
.btn.wa{background:var(--w);color:#fff}.btn.ghost{border:2px solid #fff;color:#fff}
.faq h2,.refs h2,.author h2{font-size:1.45rem;color:var(--d)}
.faq details{border:1px solid var(--b);border-radius:12px;margin:8px 0;background:#fbfefd}
.faq summary{cursor:pointer;padding:12px 16px;font-weight:700;color:var(--d)}
.faq details div{padding:0 16px 14px}
.refs ol{font-size:.9rem;padding-inline-start:22px}.refs li{margin:4px 0;word-break:break-word}
.author{background:var(--a);border-radius:12px;padding:6px 20px 16px;margin-top:24px}
.mainlinks{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 12px}
.mainlinks a{background:#fff;border:1px solid var(--b);border-radius:999px;padding:2px 12px;font-size:.88rem;text-decoration:none}
.author .more{font-weight:700}
.disc{font-size:.85rem;color:var(--m);background:#fff8ec;border-radius:10px;padding:10px 14px;margin-top:18px}
.side{display:flex;flex-direction:column;gap:16px}
.side .box{background:var(--c);border:1px solid var(--b);border-radius:var(--r);padding:14px 16px;display:flex;flex-direction:column}
.side h3{margin:0 0 6px;font-size:1.05rem;color:var(--d)}
.side .box a{padding:4px 0;text-decoration:none;border-bottom:1px dashed var(--b);font-size:.95rem}
.side .box a.on{font-weight:800}
.side .ctab{position:sticky;top:130px;gap:10px;text-align:center}.side .ctab a{border:0}
.relwrap h2{color:var(--d)}
.rels{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px;margin-bottom:30px}
.rel{background:var(--c);border:1px solid var(--b);border-radius:12px;padding:14px 16px;text-decoration:none;color:var(--t);display:flex;flex-direction:column}
.rel strong{color:var(--d)}.rel small{color:var(--m);line-height:1.6}
.rel:hover{border-color:var(--p2)}
.foot{background:var(--d);color:#cfe0de;padding:34px 0 80px;font-size:.92rem}
.foot a{color:#cfe0de;text-decoration:none;display:block;padding:2px 0}.foot a:hover{color:#fff}
.foot h3{color:#fff;font-size:1rem}.foot .logo{color:#fff;display:flex}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr .8fr;gap:24px}
.copy{text-align:center;margin-top:24px;opacity:.7}
.wa-float{position:fixed;bottom:18px;inset-inline-end:18px;z-index:50;display:flex;align-items:center;gap:8px;background:var(--w);color:#fff;text-decoration:none;border-radius:999px;padding:10px 16px 10px 12px;box-shadow:0 8px 24px #25d36666;font-weight:700;animation:pulse 2.4s infinite}
.wa-float span{font-size:.95rem}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 #25d36680}50%{box-shadow:0 0 0 12px #25d36600}}
@media (max-width:960px){.layout{grid-template-columns:1fr}.side{display:none}.fgrid{grid-template-columns:1fr 1fr}}
@media (max-width:600px){body{font-size:16px}.post{padding:18px 16px}h1,.home h1{font-size:1.8rem}.content h2{font-size:1.35rem}.wa-float span{display:none}.wa-float{padding:12px}.fgrid{grid-template-columns:1fr}.langs summary,.menu summary{padding:4px 8px;font-size:.82rem}}
@media print{.top,.side,.wa-float,.cta,.foot,.relwrap{display:none}}