:root { --primary:#2563eb; --primary-dark:#1d4ed8; --bg:#fafafa; --card:#fff; --text:#1f2937; --muted:#6b7280; --border:#e5e7eb; }
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font-family:'Inter','SF Pro Text',-apple-system,sans-serif;line-height:1.65}
body[dir="rtl"]{font-family:'Vazirmatn','Inter',sans-serif}
a{color:var(--primary);text-decoration:none}a:hover{color:var(--primary-dark)}
header{background:#fff;border-bottom:1px solid var(--border);padding:16px 24px;display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;z-index:10;box-shadow:0 1px 0 rgba(0,0,0,.02)}
.logo{display:flex;align-items:center;gap:12px;font-size:18px;font-weight:700;color:var(--text)}
.logo:hover{color:var(--text)}
.logo-icon{width:36px;height:36px;border-radius:8px;object-fit:cover}
.lang-toggle{display:flex;gap:0;background:#f3f4f6;border-radius:8px;padding:4px}
.lang-toggle button{border:none;background:transparent;padding:6px 16px;border-radius:6px;cursor:pointer;font-weight:500;color:var(--muted);font-family:inherit;font-size:14px}
.lang-toggle button.active{background:white;color:var(--text);box-shadow:0 1px 3px rgba(0,0,0,.08)}
main{max-width:780px;margin:0 auto;padding:40px 24px 80px}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:20px}
.crumbs a{color:var(--muted)}
h1{font-size:36px;margin:0 0 12px;font-weight:700;line-height:1.15;letter-spacing:-.02em}
h2{font-size:22px;margin:40px 0 14px;font-weight:600;line-height:1.3}
h3{font-size:17px;margin:24px 0 10px;font-weight:600}
p{margin:0 0 16px}
.lead{font-size:18px;color:var(--muted);margin-bottom:32px;line-height:1.55}
ol,ul{padding-left:24px;margin:0 0 18px}
body[dir="rtl"] ol,body[dir="rtl"] ul{padding-left:0;padding-right:24px}
li{margin-bottom:8px}
code{background:#f1f5f9;padding:2px 7px;border-radius:5px;font-size:13.5px;font-family:ui-monospace,'SF Mono',Menlo,monospace;color:#0f172a;border:1px solid #e2e8f0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px;margin-top:28px}
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:24px;transition:all .18s ease;text-decoration:none;color:inherit;display:block}
.card:hover{border-color:var(--primary);transform:translateY(-3px);box-shadow:0 12px 32px rgba(37,99,235,.10);color:inherit}
.card-icon{font-size:32px;margin-bottom:14px;display:block;line-height:1}
.card h3{margin:0 0 8px;font-size:17px;color:var(--text)}
.card p{margin:0;color:var(--muted);font-size:14px;line-height:1.5}
.note,.warn{border-radius:10px;padding:16px 20px;margin:22px 0;font-size:14.5px;line-height:1.55}
.note{background:#eff6ff;border:1px solid #bfdbfe;color:#1e3a8a}
.warn{background:#fef3c7;border:1px solid #fde68a;color:#78350f}
.settings{background:#f8fafc;border:1px solid var(--border);border-radius:12px;padding:8px 22px 16px;margin:22px 0}
.settings h3{margin-top:14px}
.settings table{width:100%;border-collapse:collapse;font-size:14px}
.settings td{padding:10px 4px;border-bottom:1px solid var(--border);vertical-align:top}
.settings td:first-child{font-weight:500;color:var(--muted);width:42%;padding-right:16px}
.settings tr:last-child td{border-bottom:none}
.steps{counter-reset:step;padding:0;list-style:none;margin:28px 0}
.steps > li{counter-increment:step;padding-left:52px;position:relative;margin-bottom:24px;min-height:36px}
body[dir="rtl"] .steps > li{padding-left:0;padding-right:52px}
.steps > li::before{content:counter(step);position:absolute;left:0;top:-3px;width:34px;height:34px;background:var(--primary);color:white;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:15px}
body[dir="rtl"] .steps > li::before{left:auto;right:0}
footer{text-align:center;padding:32px 24px;color:var(--muted);font-size:14px;border-top:1px solid var(--border);background:white;margin-top:48px}
footer a{color:var(--primary)}
[data-lang="fa"]{display:none}
body[dir="rtl"] [data-lang="en"]{display:none}
body[dir="rtl"] [data-lang="fa"]{display:revert}
@media (max-width:640px){main{padding:24px 18px 56px}h1{font-size:28px}h2{font-size:20px}.lead{font-size:16px}header{padding:12px 16px}.logo{font-size:16px;gap:10px}.logo-icon{width:30px;height:30px}.lang-toggle button{padding:5px 12px;font-size:13px}}
/* Search */
.search-wrap{position:relative;margin:0 0 28px}
.search-input{width:100%;padding:14px 18px 14px 48px;border:1px solid var(--border);border-radius:12px;background:#fff;font-family:inherit;font-size:15px;color:var(--text);box-shadow:0 1px 2px rgba(0,0,0,.03)}
body[dir="rtl"] .search-input{padding:14px 48px 14px 18px}
.search-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px rgba(37,99,235,.10)}
.search-input::placeholder{color:#9ca3af}
.search-icon{position:absolute;left:18px;top:50%;transform:translateY(-50%);width:18px;height:18px;pointer-events:none;color:#9ca3af}
body[dir="rtl"] .search-icon{left:auto;right:18px}
#search-results{position:absolute;top:calc(100% + 6px);left:0;right:0;background:white;border:1px solid var(--border);border-radius:12px;box-shadow:0 12px 36px rgba(0,0,0,.12);max-height:520px;overflow-y:auto;display:none;z-index:50}
.sr-item{display:block;padding:14px 18px;border-bottom:1px solid var(--border);text-decoration:none;color:var(--text)}
.sr-item:hover{background:#f3f4f6;text-decoration:none}
.sr-item:last-child{border-bottom:none}
.sr-item.rtl{direction:rtl;text-align:right;font-family:'Vazirmatn','Inter',sans-serif}
.sr-title{font-weight:600;font-size:15px;margin-bottom:3px;color:var(--text)}
.sr-snip{font-size:13.5px;color:var(--muted);line-height:1.5}
mark{background:#fef3c7;color:#92400e;padding:0 2px;border-radius:3px}
.sr-empty{padding:18px;text-align:center;color:var(--muted);font-size:14px}