:root{
  --bg:#f5f7fb;
  --surface:#ffffff;
  --surface-soft:#f8fbff;
  --text:#10233e;
  --muted:#66768f;
  --line:#dbe5f2;
  --primary:#3b6df6;
  --primary-dark:#2d57cc;
  --shadow:0 12px 34px rgba(16,35,62,.08);
  --radius:20px;
  --container:1280px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at top left, #ffffff 0, #f8fbff 32%, #f5f7fb 70%);
}
a{text-decoration:none;color:inherit}
.container{max-width:var(--container);margin:0 auto;padding:0 20px}
.topbar{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.82);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(219,229,242,.9);
}
.topbar .inner{
  min-height:78px;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
}
.brand{display:flex;align-items:center;gap:14px}
.brand-mark{
  width:44px;height:44px;border-radius:16px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,#6a8cff,#3b6df6);
  color:#fff;font-weight:800;
  box-shadow:0 14px 28px rgba(59,109,246,.24);
}
.brand h1{margin:0;font-size:19px;line-height:1.05}
.brand p{margin:4px 0 0;font-size:13px;color:var(--muted)}
.nav{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.nav a{font-size:14px;color:var(--muted)}
.nav a:hover{color:var(--text)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 18px;border-radius:14px;border:1px solid var(--line);
  background:#fff;color:var(--text);font:inherit;cursor:pointer;transition:.18s ease
}
.btn:hover{transform:translateY(-1px)}
.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn.primary:hover{background:var(--primary-dark)}
.btn.soft{background:var(--surface-soft)}
.hero{padding:38px 0 18px}
.hero-grid{
  display:grid;grid-template-columns:minmax(0,1.25fr) minmax(280px,.75fr);gap:24px;
}
.card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.card-body{padding:24px}
.hero-copy h2{
  margin:0;
  font-size:48px;line-height:1.02;letter-spacing:-.03em;
  max-width:760px;
}
.hero-copy p{
  margin:14px 0 0;
  font-size:17px;line-height:1.72;color:var(--muted);
  max-width:760px;
}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.search-shell{
  margin-top:22px;
  display:flex;align-items:center;gap:10px;
  min-height:58px;padding:0 16px;border:1px solid var(--line);
  border-radius:18px;background:#fff
}
.search-shell input{
  flex:1;border:0;outline:0;background:transparent;color:var(--text);font:inherit;font-size:15px
}
.hero-kpis{
  margin-top:20px;display:grid;grid-template-columns:repeat(3,1fr);gap:12px
}
.kpi{
  border:1px solid var(--line);
  border-radius:18px;
  padding:16px;
  background:linear-gradient(180deg,#fff,#f9fbff);
}
.kpi strong{display:block;font-size:24px}
.kpi span{display:block;margin-top:5px;font-size:13px;color:var(--muted)}
.ad-card{
  min-height:100%;display:flex;flex-direction:column;justify-content:center;align-items:center;
  text-align:center;padding:28px;position:relative;
  background:linear-gradient(180deg,#ffffff,#f3f8ff);
}
.ad-card:before{
  content:"ADVERTISEMENT";
  position:absolute;top:14px;left:16px;
  font-size:10px;letter-spacing:.16em;color:#8ba0bf
}
.ad-card h3{margin:0;font-size:24px}
.ad-card p{margin:10px 0 0;color:var(--muted);line-height:1.6}
.ad-placeholder{
  width:100%;margin-top:18px;border:1px dashed #a9bfdc;border-radius:16px;
  min-height:180px;display:grid;place-items:center;color:#6a84a9;background:#fbfdff
}
.layout{padding:12px 0 34px}
.layout-grid{
  display:grid;grid-template-columns:300px minmax(0,1fr);gap:24px;align-items:start
}
.sidebar-sticky{position:sticky;top:96px}
.side-title{
  margin:0 0 14px;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)
}
.tool-list{display:grid;gap:10px}
.tool-link{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:14px 16px;border-radius:16px;border:1px solid var(--line);
  background:#fff;font-size:15px;transition:.18s ease
}
.tool-link:hover{border-color:#bdd0ee;background:#f9fbff}
.tool-link.active{
  background:linear-gradient(180deg,#f7fbff,#edf4ff);
  border-color:#bfd2f4;color:var(--primary);font-weight:700
}
.badge{
  display:inline-flex;align-items:center;justify-content:center;
  padding:5px 9px;border-radius:999px;font-size:11px;
  color:var(--primary);background:#eff5ff;border:1px solid #d8e5ff
}
.section{margin-bottom:24px}
.section-head{
  display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:14px
}
.section-head h3{margin:0;font-size:28px;letter-spacing:-.02em}
.section-head p{margin:6px 0 0;color:var(--muted);font-size:14px}
.tool-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.tool-card{
  display:flex;flex-direction:column;gap:12px;
  padding:22px;border-radius:20px;border:1px solid var(--line);background:#fff;
  min-height:190px;transition:.18s ease
}
.tool-card:hover{transform:translateY(-2px);border-color:#c2d4f0;box-shadow:0 14px 34px rgba(16,35,62,.08)}
.tool-card h4{margin:0;font-size:20px;letter-spacing:-.02em}
.tool-card p{margin:0;color:var(--muted);line-height:1.65;font-size:14px}
.tool-card .meta{
  margin-top:auto;display:flex;justify-content:space-between;align-items:center;
  font-size:12px;color:var(--muted)
}
.tool-page{padding:28px 0 40px}
.tool-page-grid{
  display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:24px;align-items:start
}
.tool-main .card + .card{margin-top:18px}
.panel-head{
  display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:16px
}
.panel-head h2,.panel-head h3{margin:0;letter-spacing:-.02em}
.panel-head p{margin:8px 0 0;color:var(--muted);line-height:1.7}
.split-2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.panel{
  border:1px solid var(--line);
  border-radius:18px;background:linear-gradient(180deg,#fff,#fbfdff);
  padding:18px;
}
.meta{font-size:12px;color:var(--muted)}
textarea,input,select{
  width:100%;border:1px solid #c9d8eb;border-radius:16px;padding:14px;
  background:#fff;color:var(--text);font:inherit;outline:none
}
textarea:focus,input:focus,select:focus{border-color:#8eb0ff;box-shadow:0 0 0 4px rgba(59,109,246,.08)}
textarea{min-height:280px;resize:vertical}
.controls{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:14px}
.control{
  border:1px solid var(--line);border-radius:16px;background:#fff;padding:14px
}
.control label{display:block;font-size:14px;font-weight:600;margin-bottom:8px}
.toggle{display:flex;align-items:center;justify-content:space-between;gap:14px}
.switch{position:relative;width:50px;height:30px;display:inline-block}
.switch input{display:none}
.slider{position:absolute;inset:0;background:#cfdbeb;border-radius:999px;transition:.2s ease}
.slider:before{
  content:"";position:absolute;left:4px;top:4px;width:22px;height:22px;
  border-radius:50%;background:#fff;box-shadow:0 2px 6px rgba(0,0,0,.15);transition:.2s ease
}
.switch input:checked + .slider{background:var(--primary)}
.switch input:checked + .slider:before{transform:translateX(20px)}
.case-buttons,.action-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.small-note{font-size:13px;line-height:1.7;color:var(--muted)}
.output-box{
  min-height:280px;background:#f8fbff
}
pre.code{
  min-height:280px;white-space:pre-wrap;word-break:break-word;overflow:auto;
  margin:0;border-radius:16px;padding:14px;
  background:#0f172a;color:#e4edff;border:1px solid #1e2f4c
}
.footer{padding:26px 0 44px;color:var(--muted)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px}
.footer h4{margin:0 0 10px;color:var(--text)}
.footer ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.ad-inline{
  min-height:160px;border-radius:18px;border:1px dashed #adc1df;
  background:linear-gradient(180deg,#ffffff,#f5faff);
  display:grid;place-items:center;text-align:center;color:#6883aa;position:relative
}
.ad-inline:before{
  content:"ADVERTISEMENT";position:absolute;top:12px;left:14px;font-size:10px;letter-spacing:.16em;color:#8ba0bf
}
@media (max-width:1120px){
  .hero-grid,.layout-grid,.tool-page-grid,.footer-grid{grid-template-columns:1fr}
  .sidebar-sticky{position:static}
}
@media (max-width:900px){
  .tool-grid,.split-2,.hero-kpis{grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  .nav{display:none}
  .hero-copy h2{font-size:34px}
  .tool-grid,.split-2,.controls,.hero-kpis{grid-template-columns:1fr}
  .container{padding:0 14px}
  .card-body{padding:18px}
  .section-head h3{font-size:24px}
}