:root{
  --max: 980px;
  --border: #e6e6e6;
  --text: #111;
  --muted: #555;
  --bg: #fff;
  --card: #fafafa;
  --soft: #f4f4f4;
}

*{ box-sizing:border-box; }
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.55;
}
a{ color:inherit; }
header{
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom:1px solid var(--border);
  background:rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
}
.container{
  max-width:var(--max);
  margin:0 auto;
  padding:18px;
}
.nav{
  display:flex;
  gap:12px;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
}
.nav a{
  text-decoration:none;
}
.navlinks{
  display:flex;
  gap:14px;
  flex-wrap:wrap;
  align-items:center;
}
.lang{
  display:flex;
  gap:10px;
  align-items:center;
}
.badge{
  font-size:12px;
  padding:6px 10px;
  border:1px solid var(--border);
  border-radius:999px;
  background:#fff;
}
main{ padding:22px 0; }
h1{ margin:0 0 10px 0; font-size:32px; letter-spacing:-0.02em; }
h2{ margin:0 0 10px 0; font-size:18px; }
h3{ margin:0 0 8px 0; font-size:16px; }
p{ margin:0 0 12px 0; color:var(--muted); }

.card{
  border:1px solid var(--border);
  background:var(--card);
  border-radius:14px;
  padding:16px;
  margin:14px 0;
}
.grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:12px;
}
@media (max-width: 780px){
  .grid{ grid-template-columns: 1fr; }
}

.hero{
  border:1px solid var(--border);
  background: linear-gradient(180deg, var(--soft), #fff);
  border-radius:18px;
  padding:18px;
  margin:14px 0;
}
.hero p{ color:var(--muted); }
.hero-actions{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  margin-top:12px;
}

label{
  display:block;
  font-size:14px;
  margin:8px 0 6px;
  color:var(--text);
}
input, select{
  width:100%;
  padding:10px 12px;
  border:1px solid var(--border);
  border-radius:12px;
  font-size:16px;
  background:#fff;
}
button{
  padding:10px 14px;
  border:1px solid var(--border);
  border-radius:12px;
  background:#fff;
  font-size:16px;
  cursor:pointer;
}
button:hover{ background:#f7f7f7; }
.result{
  font-size:20px;
  color:var(--text);
}
.small{
  font-size:13px;
  color:var(--muted);
}
.footer{
  border-top:1px solid var(--border);
  padding:18px 0;
  color:var(--muted);
  font-size:13px;
}
.notice{
  border-left:4px solid var(--border);
  padding:10px 12px;
  background:#fff;
  border-radius:12px;
}
.ad-slot{
  border:1px dashed var(--border);
  border-radius:14px;
  padding:18px;
  text-align:center;
  color:var(--muted);
  background:#fff;
}