:root{
  --bg:#f4f7fb;
  --card:rgba(255,255,255,.94);
  --text:#111827;
  --muted:#7b8494;
  --line:#e5e9f0;
}

*{
  -webkit-tap-highlight-color:transparent;
}

body{
  min-height:100vh;
  background:
    radial-gradient(circle at 15% 10%,rgba(99,102,241,.10),transparent 32%),
    radial-gradient(circle at 85% 90%,rgba(59,130,246,.08),transparent 30%),
    var(--bg);
  color:var(--text);
  padding:60px 24px;
}

.container{
  max-width:860px;
  margin:0 auto;
}

h1{
  font-size:38px;
  letter-spacing:-1.5px;
  margin:0 0 8px;
}

.subtitle{
  color:var(--muted);
  font-size:16px;
  margin-bottom:30px;
}
.card{
  background:var(--card);
  padding:38px;
  border:1px solid rgba(255,255,255,.85);
  border-radius:24px;
  box-shadow:0 24px 70px rgba(31,41,55,.10);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
}

.card h2{
  margin:0 0 28px;
  font-size:25px;
  letter-spacing:-.5px;
}

label{
  margin-top:22px;
  font-size:14px;
  font-weight:600;
  color:#4b5563;
}

input,select{
  height:56px;
  padding:0 17px;
  background:#f8fafc;
  border:1px solid var(--line);
  border-radius:13px;
  font-size:16px;
  transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease,background .2s ease;
}

input:focus,select:focus{
  outline:none;
  background:#fff;
  border-color:#6b7280;
  box-shadow:0 0 0 4px rgba(17,24,39,.06);
  transform:translateY(-1px);
}

button{
  min-height:56px;
  border:0;
  border-radius:13px;
  font-size:16px;
  font-weight:600;
  transition:transform .18s ease,box-shadow .18s ease,opacity .18s ease;
}

button:hover{
  transform:translateY(-2px);
  box-shadow:0 12px 28px rgba(17,24,39,.16);
}

button:active{
  transform:scale(.985);
}
#codeModal{
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  animation:modalFade .22s ease;
}

.modal-box{
  border:1px solid rgba(255,255,255,.8);
  border-radius:24px;
  padding:34px;
  box-shadow:0 30px 90px rgba(15,23,42,.24);
  animation:modalUp .28s cubic-bezier(.2,.8,.2,1);
}

.modal-title{
  font-size:25px;
  letter-spacing:-.5px;
}

.modal-code{
  margin-top:20px;
  padding:20px;
  border:1px solid #e8ecf2;
  border-radius:14px;
  background:#f7f9fc;
  font-family:monospace;
  font-size:19px;
  line-height:1.7;
}

.copy-btn{
  background:linear-gradient(135deg,#111827,#303846);
  color:#fff;
}

.close-btn{
  background:#f1f3f6;
  color:#374151;
  box-shadow:none;
}

.copy-status{
  font-weight:600;
}

@keyframes modalFade{
  from{opacity:0}
  to{opacity:1}
}

@keyframes modalUp{
  from{opacity:0;transform:translateY(18px) scale(.97)}
  to{opacity:1;transform:translateY(0) scale(1)}
}

@media(max-width:600px){
  body{padding:32px 16px}
  h1{font-size:31px}
  .card{padding:26px 20px;border-radius:20px}
  .modal-box{padding:26px 20px}
}
.modal-code{
  white-space:pre-line;
  text-align:left;
}