:root{
  --bg:#0b0b0d;
  --card:#141418;
  --text:#f1f1f1;
  --muted:#bdbdbd;
  --line:#2a2a33;
  --btn:#23232c;
  --btn2:#2d2d3a;
  --danger:#7a1f1f;
  --danger2:#9b2a2a;
  --radius:16px;
}

*{ box-sizing:border-box; }
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background:var(--bg);
  color:var(--text);
}

.header{
  position:sticky;
  top:0;
  z-index:10;
  background:rgba(11,11,13,.9);
  backdrop-filter: blur(8px);
  border-bottom:1px solid var(--line);
}

.brand{
  max-width:900px;
  margin:0 auto;
  padding:14px 16px;
  display:flex;
  align-items:center;
  gap:12px;
}

.logo{
  width:44px;
  height:44px;
  display:grid;
  place-items:center;
  border:1px solid var(--line);
  border-radius:12px;
  background:var(--card);
  font-size:22px;
}

.title{ font-size:20px; font-weight:800; letter-spacing:.2px; }
.subtitle{ color:var(--muted); font-size:13px; margin-top:2px; }

.container{
  max-width:900px;
  margin:0 auto;
  padding:16px;
  display:grid;
  gap:14px;
}

.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:14px;
}

.card-header{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:12px;
  margin-bottom:10px;
}

h2{ margin:0; font-size:18px; }

.row{
  display:flex;
  align-items:center;
  justify-content:flex-start;
}

.gap{ gap:10px; flex-wrap:wrap; }

.check{
  display:flex;
  gap:8px;
  align-items:center;
  color:var(--muted);
  font-size:13px;
}

.btn{
  border:1px solid var(--line);
  background:var(--btn);
  color:var(--text);
  border-radius:12px;
  padding:10px 12px;
  cursor:pointer;
  font-weight:700;
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:120px;
}
.btn:hover{ background:var(--btn2); }
.btn:disabled{ opacity:.5; cursor:not-allowed; }

.primary{
  border-color:transparent;
  background:#ffffff;
  color:#000;
}
.primary:hover{ background:#e9e9e9; }

.danger{
  background:var(--danger);
}
.danger:hover{ background:var(--danger2); }

.field{
  width:100%;
  display:grid;
  gap:6px;
  margin-top:10px;
}
.label{ color:var(--muted); font-size:13px; }
.field input{
  width:100%;
  padding:10px 12px;
  border-radius:12px;
  border:1px solid var(--line);
  background:#0f0f13;
  color:var(--text);
  outline:none;
}
.field input:focus{ border-color:#666; }

.result{
  border:1px dashed #3a3a46;
  border-radius:14px;
  padding:14px;
  margin:10px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
}

.nums{
  font-size:22px;
  font-weight:900;
  letter-spacing:1px;
}

.pb{
  display:flex;
  align-items:center;
  gap:10px;
}
.pill{
  font-size:12px;
  color:var(--muted);
  border:1px solid var(--line);
  padding:6px 10px;
  border-radius:999px;
}
.pbnum{
  width:44px;
  height:44px;
  display:grid;
  place-items:center;
  border-radius:999px;
  background:#fff;
  color:#000;
  font-weight:900;
  font-size:18px;
}

.fineprint{ color:var(--muted); font-size:12px; margin:10px 0 0; line-height:1.4; }

.list{
  display:grid;
  gap:10px;
}
.item{
  border:1px solid var(--line);
  border-radius:14px;
  padding:12px;
  background:#101015;
}
.item-top{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:10px;
  flex-wrap:wrap;
}
.item-nums{
  font-weight:900;
  letter-spacing:.8px;
}
.item-meta{
  color:var(--muted);
  font-size:12px;
  margin-top:6px;
}
.item-actions{
  display:flex;
  gap:8px;
}
.small{
  min-width:auto;
  padding:8px 10px;
  font-size:13px;
}

.empty{
  color:var(--muted);
  font-size:13px;
  margin-top:8px;
  display:none;
}

.grid{
  display:grid;
  gap:10px;
}
@media (min-width: 680px){
  .grid{ grid-template-columns: 2fr 1fr; }
}

.check-output{
  margin-top:10px;
  border:1px solid var(--line);
  border-radius:14px;
  padding:12px;
  background:#101015;
  min-height:44px;
}

.link{
  color:#fff;
  text-decoration:underline;
  font-weight:700;
  margin-top:10px;
  display:inline-block;
}

.footer{
  text-align:center;
  color:var(--muted);
  font-size:12px;
  padding:12px 0 24px;
}
.muted{ margin-top:6px; }