:root{
  --bg:#ffffff;
  --text:#111111;
  --muted:#777777;
  --border:#e8e8e8;
  --soft:#fafafa;
}

*{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);
}

a{ color: inherit; text-decoration: none; }
a:visited{ color: inherit; }
:focus{ outline: none; }
:focus-visible{ outline: none; }

.page{
  min-height: 100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:24px 16px;
}

.panel{
  width: min(760px, 100%);
  border: 1px solid var(--border);
  border-radius: 18px;
  background: #fff;
  padding: 22px;
  box-shadow: 0 12px 30px rgba(0,0,0,0.06);
  text-align: center;
}

.content{
  text-align: left;
  margin: 0 auto;
  max-width: 660px;
}

.tokenline{
  margin-top: 10px;
  font-size: 12px;
  text-align: left;
  max-width: 660px;
  margin-left: auto;
  margin-right: auto;
}

.hr{
  height:1px;
  background: var(--border);
  margin: 16px auto;
  max-width: 660px;
}

.label{
  display:block;
  margin: 0 auto 6px;
  max-width: 660px;
  text-align:left;
  font-size: 13px;
  color: #333;
}

input{
  width: 100%;
  max-width: 660px;
  padding: 12px 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 14px;
  background: #fff;
}

input:focus{
  border-color: #d6d6d6;
}

pre{
  background: var(--soft);
  border: 1px solid var(--border);
  padding: 12px;
  border-radius: 12px;
  overflow:auto;
  margin: 10px 0;
}

code{
  background: var(--soft);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 10px;
}

.actions{
  display:flex;
  gap: 10px;
  justify-content:center;
  margin-top: 12px;
}

.btn{
  border: 1px solid #111;
  background: #111;
  color: #fff;
  padding: 10px 14px;
  border-radius: 12px;
  cursor:pointer;
  font-size: 14px;
}

.btn.ghost{
  background: #fff;
  color: #111;
  border: 1px solid var(--border);
}

.btn:disabled{
  opacity: 0.55;
  cursor: default;
}

.msg{
  display:none;
  max-width: 660px;
  margin: 12px auto 0;
  text-align:left;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #fff;
}

.msg.ok{
  border-color: #cce9cc;
  background: #f2fbf2;
}

.msg.err{
  border-color: #f0caca;
  background: #fff5f5;
}

.hintbox{
  max-width: 660px;
  margin: 12px auto 0;
  text-align:left;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 12px;
  padding: 10px 12px;
}

.hinttitle{
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}