:root{
  --bg:#0b1020;
  --card:#111a33;
  --text:#e8eeff;
  --muted:#a7b2d6;
  --accent:#4cff88;
  --accent2:#6aa8ff;
  --danger:#ff6b6b;
  --line:#243055;
}

*{box-sizing:border-box}
body{
  margin:0;
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:18px;
  background: radial-gradient(1200px 700px at 30% 10%, #14204a 0%, var(--bg) 55%, #070a14 100%);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, Arial, sans-serif;
  color:var(--text);
}

.card{
  width:min(720px, 100%);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  border:1px solid rgba(255,255,255,.10);
  border-radius:18px;
  box-shadow: 0 18px 60px rgba(0,0,0,.45);
  padding:18px;
}

.head{margin-bottom:14px}
.title{font-size:22px; font-weight:800; letter-spacing:.2px}
.sub{margin-top:6px; color:var(--muted); font-size:14px}

.form{
  padding:14px;
  border:1px solid rgba(255,255,255,.08);
  border-radius:14px;
  background: rgba(0,0,0,.18);
}

label{display:block; font-size:13px; color:var(--muted); margin-bottom:8px}
.row{display:flex; gap:10px}
input{
  flex:1;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.12);
  background: rgba(0,0,0,.25);
  color:var(--text);
  padding:12px 12px;
  font-size:16px;
  outline:none;
}
input:focus{border-color: rgba(76,255,136,.55); box-shadow: 0 0 0 3px rgba(76,255,136,.15)}
button{
  border:0;
  border-radius:12px;
  padding:12px 14px;
  font-weight:800;
  cursor:pointer;
  color:#04110a;
  background: linear-gradient(180deg, var(--accent), #2fe470);
}
button:active{transform: translateY(1px)}
.hint{margin-top:8px; color:var(--muted); font-size:12px}

.out{
  margin-top:14px;
  padding:14px;
  border:1px solid rgba(255,255,255,.08);
  border-radius:14px;
  background: rgba(0,0,0,.18);
}

.line{
  display:flex;
  justify-content:space-between;
  padding:10px 0;
  border-bottom:1px solid rgba(255,255,255,.07);
  gap:12px;
}
.line span{color:var(--muted)}
.total{
  display:flex;
  justify-content:space-between;
  padding:12px 0 6px;
  font-size:18px;
  gap:12px;
}
.total b{color:var(--accent2)}

.ghost{
  width:100%;
  margin-top:10px;
  background: transparent;
  color: var(--text);
  border:1px solid rgba(255,255,255,.14);
}
.note{margin-top:10px; color:var(--muted); font-size:12px}

.foot{
  margin-top:14px;
  color:var(--muted);
  font-size:12px;
  border-top:1px solid rgba(255,255,255,.08);
  padding-top:12px;
}
code{
  display:inline-block;
  margin-top:6px;
  padding:6px 8px;
  border-radius:10px;
  border:1px solid rgba(255,255,255,.10);
  background: rgba(0,0,0,.25);
  color: var(--text);
}