:root{
  --bg:#0b1220;--panel:#111a2e;--panel2:#16213a;--line:#24324f;--text:#e8edf7;--muted:#93a1bd;
  --accent:#2dd4bf;--accent-ink:#04201c;--up:#34d399;--down:#f87171;--warn:#fbbf24;--shadow:0 6px 24px rgba(0,0,0,.28);
  --radius:14px;color-scheme:dark;
}
:root[data-theme="light"]{
  --bg:#f4f7fb;--panel:#ffffff;--panel2:#eef3fa;--line:#d6dfee;--text:#0f1b33;--muted:#5a6b88;
  --accent:#0d9488;--accent-ink:#ffffff;--up:#059669;--down:#dc2626;--warn:#b45309;--shadow:0 6px 24px rgba(15,27,51,.08);
  color-scheme:light;
}
@media (prefers-color-scheme: light){
  :root:not([data-theme="dark"]){
    --bg:#f4f7fb;--panel:#ffffff;--panel2:#eef3fa;--line:#d6dfee;--text:#0f1b33;--muted:#5a6b88;
    --accent:#0d9488;--accent-ink:#ffffff;--up:#059669;--down:#dc2626;--warn:#b45309;--shadow:0 6px 24px rgba(15,27,51,.08);
    color-scheme:light;
  }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);line-height:1.6;
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans","Noto Naskh Arabic",Tahoma,Arial,sans-serif;font-size:16px}
a{color:var(--accent)}
h1,h2,h3{line-height:1.25;margin:0 0 .5em}
h1{font-size:clamp(1.7rem,4.5vw,2.6rem);letter-spacing:-.01em}
h2{font-size:1.3rem}h3{font-size:1.02rem;color:var(--muted);font-weight:600;margin-top:1.1em}
p{margin:.4em 0 .8em}
.wrap{max-width:1100px;margin-inline:auto;padding-inline:16px}
.skip{position:absolute;inset-inline-start:-999px;top:0;background:var(--accent);color:var(--accent-ink);padding:8px 12px;z-index:50}
.skip:focus{inset-inline-start:8px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.muted{color:var(--muted)}.small{font-size:.85rem}.accent{color:var(--accent)}
.site-header{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding-block:10px}
.brand{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--text);text-decoration:none;font-size:1.1rem}
.nav{display:flex;gap:14px;flex:1;flex-wrap:wrap}
.nav a{color:var(--muted);text-decoration:none;font-size:.92rem}
.nav a:hover{color:var(--text)}
.tools{display:flex;align-items:center;gap:8px;margin-inline-start:auto}
.langs{display:flex;gap:4px;flex-wrap:wrap}
.langs a{padding:3px 8px;border:1px solid var(--line);border-radius:999px;color:var(--muted);text-decoration:none;font-size:.8rem}
.langs a[aria-current="true"]{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.icon-btn{background:var(--panel);color:var(--text);border:1px solid var(--line);border-radius:999px;width:34px;height:34px;cursor:pointer;font-size:1rem}
.banner{background:color-mix(in srgb,var(--warn) 14%,var(--bg));border-bottom:1px solid color-mix(in srgb,var(--warn) 40%,var(--line));font-size:.88rem}
.banner .wrap{padding-block:8px}
.hero{padding-block:34px 18px}
.lead{color:var(--muted);font-size:1.08rem;max-width:62ch}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin-block:16px;box-shadow:var(--shadow)}
.card-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;flex-wrap:wrap;margin-bottom:8px}
.controls{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.controls label{display:flex;gap:6px;align-items:center;font-size:.88rem;color:var(--muted)}
.check{display:flex;gap:6px;align-items:center;font-size:.88rem;color:var(--muted)}
select,input[type=text],input[type=number],input[type=password]{background:var(--panel2);color:var(--text);border:1px solid var(--line);border-radius:10px;padding:9px 10px;font:inherit;max-width:100%}
input:focus,select:focus,button:focus-visible,a:focus-visible,summary:focus-visible,tr:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.btn{display:inline-block;background:var(--panel2);color:var(--text);border:1px solid var(--line);border-radius:10px;padding:9px 14px;font:inherit;cursor:pointer;text-decoration:none;font-size:.92rem}
.btn:hover{border-color:var(--accent)}
.btn.primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent);font-weight:600}
.btn[disabled]{opacity:.55;cursor:wait}
.status{min-height:1.4em;color:var(--muted);margin:.2em 0}
.status.err{color:var(--down)}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:10px}
.grid{width:100%;border-collapse:collapse;min-width:560px}
.grid th,.grid td{padding:10px 12px;text-align:start;border-bottom:1px solid var(--line);white-space:nowrap}
.grid th{font-size:.78rem;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;background:var(--panel2)}
.grid tr:last-child td{border-bottom:0}
.grid tbody tr{cursor:pointer}
.grid tbody tr:hover,.grid tbody tr.sel{background:var(--panel2)}
.num{text-align:end!important;font-variant-numeric:tabular-nums}
.coin-btn{background:none;border:0;color:var(--text);font:inherit;font-weight:600;cursor:pointer;padding:0}
.coin-sub{color:var(--muted);font-size:.8rem;margin-inline-start:6px}
.up{color:var(--up)}.down{color:var(--down)}
.pill{display:inline-block;padding:2px 10px;border-radius:999px;font-size:.8rem;font-weight:600;border:1px solid var(--line)}
.pill.sb{background:color-mix(in srgb,var(--up) 22%,transparent);color:var(--up);border-color:var(--up)}
.pill.b{background:color-mix(in srgb,var(--up) 10%,transparent);color:var(--up)}
.pill.n{color:var(--muted)}
.pill.br{background:color-mix(in srgb,var(--down) 10%,transparent);color:var(--down)}
.pill.sbr{background:color-mix(in srgb,var(--down) 22%,transparent);color:var(--down);border-color:var(--down)}
.bar-score{display:flex;align-items:center;gap:8px;min-width:120px}
.meter{position:relative;flex:1;height:6px;background:var(--panel2);border-radius:3px;overflow:hidden;border:1px solid var(--line)}
.meter i{position:absolute;top:0;bottom:0;background:var(--up)}
.meter i.neg{background:var(--down)}
.meter::after{content:"";position:absolute;inset-block:0;inset-inline-start:50%;width:1px;background:var(--muted);opacity:.6}
.x-btn{background:none;border:0;color:var(--muted);cursor:pointer;font-size:1.1rem}
.x-btn:hover{color:var(--down)}
.add{display:flex;gap:8px;align-items:center;margin-top:12px;flex-wrap:wrap}
.updated{margin:.6em 0 0;font-size:.82rem}
.price-line{font-size:1.2rem;display:flex;gap:10px;align-items:center}
.chart{width:100%;height:320px;display:block;border:1px solid var(--line);border-radius:10px;background:var(--panel2)}
.cols{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:6px}
.kv{margin:0;display:grid;grid-template-columns:1fr auto;gap:6px 14px}
.kv dt{color:var(--muted)}.kv dd{margin:0;text-align:end;font-variant-numeric:tabular-nums;font-weight:600}
.list{margin:0 0 6px;padding-inline-start:20px}
.list li{margin:3px 0}
.two{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.two .card{margin-block:16px}
.form{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:10px 0}
.form label{display:flex;flex-direction:column;gap:4px;font-size:.85rem;color:var(--muted)}
.row{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0}
.warn{color:var(--warn);min-height:1.2em}
.ai-out{background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin-block:8px;display:none;white-space:normal}
.ai-out.show{display:block}
.ai-out ul{margin:.3em 0;padding-inline-start:20px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.steps .card{margin-block:8px}
details{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:10px 14px;margin-block:8px}
summary{cursor:pointer;font-weight:600}
.ad-slot{margin-block:14px;text-align:center;min-height:100px;border:1px dashed var(--line);border-radius:10px;padding:4px;position:relative;overflow:hidden}
.ad-slot[hidden]{display:none}
.ad-slot small{display:block;color:var(--muted);font-size:.68rem;text-transform:uppercase;letter-spacing:.06em;margin-bottom:2px}
.ad-slot iframe{border:0;width:100%;height:90px;display:block;margin:auto;max-width:728px;overflow:hidden}
.site-footer{border-top:1px solid var(--line);margin-top:30px;padding-block:20px 40px;font-size:.88rem}
.note{color:var(--muted)}
.prose{max-width:780px;padding-block:24px 10px}
.prose h2{margin-top:1.4em}
@media (max-width:820px){
  .cols,.two,.steps{grid-template-columns:1fr}
  .nav{order:3;flex-basis:100%}
  .chart{height:260px}
}
@media (max-width:480px){.form{grid-template-columns:1fr}}
@media (prefers-reduced-motion:no-preference){.btn,.grid tbody tr{transition:background .15s,border-color .15s}}

/* ---- tools hub & tool pages ---- */
.crumbs{font-size:.85rem;color:var(--muted);padding-block:14px 0}
.crumbs a{color:var(--muted)}
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px;margin-block:12px}
.tool-link{display:flex;flex-direction:column;gap:4px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:14px;color:var(--text);text-decoration:none;box-shadow:var(--shadow);transition:border-color .15s,transform .15s}
.tool-link:hover{border-color:var(--accent);transform:translateY(-2px)}
.tool-link .ico{font-size:1.5rem}
.tool-link strong{font-size:1rem}
.tool-link span.d{color:var(--muted);font-size:.84rem;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.formula{font-family:ui-monospace,Menlo,Consolas,monospace;background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:10px 12px;overflow-x:auto;direction:ltr;text-align:left;font-size:.88rem}
.out-h{font-size:1.05rem;margin-top:1.2em}
.result dd{font-size:1.02rem}
.result.big dd{font-size:1.25rem;color:var(--accent)}
.tool-card .form{grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
.tool-form+.table-wrap,.out-h+.table-wrap{margin-top:8px}
.tabs{display:flex;gap:6px;margin:12px 0;flex-wrap:wrap}
.tab{background:var(--panel2);color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:7px 14px;cursor:pointer;font:inherit;font-size:.88rem}
.tab.on{background:var(--accent);color:var(--accent-ink);border-color:var(--accent);font-weight:600}
.strong{font-weight:700}
.inline{display:inline-flex;gap:8px;align-items:center;flex-direction:row!important;color:var(--muted)}
.flinks{display:flex;flex-wrap:wrap;gap:6px 14px;margin:10px 0;font-size:.86rem}
.flinks strong{color:var(--muted)}
.flinks a{color:var(--text);text-decoration:none;opacity:.85}.flinks a:hover{color:var(--accent);opacity:1}
.prose h1{margin-bottom:.6em}