*{box-sizing:border-box}
body{margin:0;font-family:Vazirmatn,Tahoma,'Segoe UI',sans-serif;background:#0f1216;color:#e6e9ef;line-height:2.05;direction:rtl}
a{color:#5db0ff;text-decoration:none}a:hover{text-decoration:underline}
header.top{background:#161b22;padding:.7rem 1rem;border-bottom:1px solid #232a33;display:flex;gap:1.2rem;flex-wrap:wrap}
header.top a{color:#fff;font-weight:700}
.wrap{max-width:820px;margin:0 auto;padding:1.2rem 1rem}
h1{font-size:1.7rem;line-height:1.7;margin:.2rem 0 1rem}
h2{font-size:1.28rem;margin:1.9rem 0 .5rem;color:#9cc4ff}
.bc{font-size:.85rem;color:#8b97a7;margin-bottom:1rem}
.bc a{color:#8b97a7}
.tip{background:#10241a;border-right:4px solid #2ec27e;padding:.5rem 1rem;border-radius:8px;margin:1rem 0}
.warn{background:#2a1614;border-right:4px solid #e5534b;padding:.5rem 1rem;border-radius:8px;margin:1rem 0}
.cta{display:block;background:#1f6feb;color:#fff;text-align:center;padding:.9rem;border-radius:10px;font-weight:700;margin:1.6rem 0}
.cta:hover{text-decoration:none;background:#388bfd}
.nav{display:flex;justify-content:space-between;flex-wrap:wrap;margin:2rem 0;gap:.6rem}
.nav a{background:#161b22;padding:.55rem .9rem;border-radius:8px;border:1px solid #232a33;font-size:.9rem}
ul{padding-right:1.3rem}li{margin:.2rem 0}
code{background:#161b22;padding:.1rem .4rem;border-radius:4px;font-family:Consolas,monospace;direction:ltr;display:inline-block}
pre{background:#0b0e12;border:1px solid #232a33;border-radius:8px;padding:.85rem 1rem;overflow-x:auto;direction:ltr;text-align:left;margin:1rem 0;font-size:.88rem}
pre code{background:none;padding:0;color:#d6deeb;display:block;line-height:1.8}
table{width:100%;border-collapse:collapse;margin:1rem 0;font-size:.95rem}
td,th{border:1px solid #232a33;padding:.45rem .6rem;text-align:right}th{background:#161b22}
.lessons{columns:2;column-gap:1.5rem}.lessons li{break-inside:avoid;margin:.35rem 0}
@media(max-width:560px){.lessons{columns:1}h1{font-size:1.4rem}}
footer{border-top:1px solid #232a33;padding:1.5rem 1rem;text-align:center;color:#8b97a7;font-size:.85rem;margin-top:2rem}
footer a{color:#8b97a7}