:root{
  --bg:#0b0f17;
  --card:#0f1624;
  --text:#e8eefc;
  --muted:#9fb0d0;
  --line:#1b2740;
  --accent:#4f7cff;
  --accent2:#35d0a6;
  --danger:#ff5a7a;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --radius: 18px;
}

*{box-sizing:border-box}
body{
  margin:0;
  background: radial-gradient(1200px 600px at 20% -10%, rgba(79,124,255,.25), transparent 60%),
             radial-gradient(1000px 600px at 100% 0%, rgba(53,208,166,.18), transparent 55%),
             var(--bg);
  color:var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial;
}

a{color:inherit; text-decoration:none}

.app{
  max-width: 980px;
  margin: 0 auto;
  padding: 18px;
}

.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding: 14px 14px;
  border: 1px solid var(--line);
  background: rgba(15,22,36,.85);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.brand{display:flex; align-items:center; gap:12px}
.logo{
  width:42px; height:42px;
  border-radius:14px;
  display:grid; place-items:center;
  font-weight:800;
  background: linear-gradient(135deg, rgba(79,124,255,.9), rgba(53,208,166,.75));
  color:#06101a;
}

.brand-title{font-size:15px; font-weight:800; letter-spacing:.2px}
.brand-sub{font-size:12px; color:var(--muted)}

.nav{display:flex; gap:10px}
.navlink{
  padding:10px 12px;
  border:1px solid var(--line);
  border-radius:14px;
  background: rgba(255,255,255,.02);
}
.navlink:hover{border-color: rgba(79,124,255,.7)}

.back{
  width:42px; height:42px;
  border-radius:14px;
  display:grid; place-items:center;
  border:1px solid var(--line);
  background: rgba(255,255,255,.02);
}

.card{
  margin-top: 14px;
  padding: 18px;
  border-radius: var(--radius);
  border:1px solid var(--line);
  background: rgba(15,22,36,.88);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
}

h1{margin:0 0 8px; font-size:22px}
p{margin:0 0 12px; line-height:1.45}
.muted{color:var(--muted)}

.grid3{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap:12px;
  margin-top: 14px;
}
.tile{
  padding:16px;
  border-radius: 18px;
  border:1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.01));
}
.tile:hover{border-color: rgba(79,124,255,.7)}
.tile-title{font-weight:800; margin-bottom:6px}
.tile-sub{color:var(--muted); font-size:13px}

.row{display:flex; flex-direction:column; gap:8px; margin: 12px 0}
.label{font-size:13px; color:var(--muted)}
.input{
  padding: 12px 12px;
  border-radius: 14px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.03);
  color: var(--text);
  outline:none;
}
.input:focus{border-color: rgba(79,124,255,.75)}

.btn{
  width:100%;
  padding: 12px 14px;
  border-radius: 14px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.03);
  color: var(--text);
  font-weight:800;
  cursor:pointer;
}
.btn-primary{
  border-color: rgba(79,124,255,.55);
  background: linear-gradient(135deg, rgba(79,124,255,.95), rgba(79,124,255,.55));
  color:#06101a;
}
.btn-primary:hover{filter: brightness(1.05)}

.status{margin-top: 10px}
.codebox{
  margin-top: 12px;
  padding: 12px;
  border-radius: 14px;
  border:1px solid var(--line);
  background: rgba(0,0,0,.25);
  overflow:auto;
  min-height: 80px;
}

.footer{
  margin-top: 12px;
  padding: 12px;
  text-align:center;
}

.spacer{height:8px}

@media (max-width: 760px){
  .grid3{grid-template-columns: 1fr}
  .nav{display:none}
}