:root{
  --bg:#0b1220;
  --card:#101a33;
  --text:#e7ecff;
  --muted:#a9b4d0;
  --border: rgba(255,255,255,.12);
  --accent:#6ea8fe;
}

*{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}

.topbar{
  position:sticky;
  top:0;
  z-index:10;
  display:flex;
  align-items:center;
  gap:12px;
  padding:12px 16px;
  background:rgba(11,18,32,.9);
  border-bottom:1px solid var(--border);
  backdrop-filter: blur(8px);
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
}

.brand img{
  width:34px;
  height:34px;
  object-fit:contain;
}

.brand .name{
  font-weight:700;
  letter-spacing:.2px;
}

.spacer{flex:1}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:10px 12px;
  border-radius:12px;
  border:1px solid var(--border);
  background:transparent;
  color:var(--text);
  text-decoration:none;
  cursor:pointer;
}

.btn.primary{
  background:var(--accent);
  border-color:transparent;
  color:#071023;
  font-weight:700;
}

.btn.small{
  padding:8px 10px;
  border-radius:10px;
  font-size:14px;
}

.shell{
  display:grid;
  grid-template-columns:260px 1fr;
  min-height:calc(100vh - 58px);
}

.sidebar{
  border-right:1px solid var(--border);
  padding:16px;
}

.nav a{
  display:flex;
  gap:10px;
  align-items:center;
  padding:10px 12px;
  border-radius:12px;
  color:var(--text);
  text-decoration:none;
  border:1px solid transparent;
}

.nav a:hover{
  border-color:var(--border);
  background:rgba(255,255,255,.04);
}

.nav .active{
  border-color:var(--border);
  background:rgba(110,168,254,.12);
}

.content{padding:18px}

.card{
  border:1px solid var(--border);
  background:rgba(16,26,51,.9);
  border-radius:16px;
  padding:16px;
}

.grid{
  display:grid;
  gap:14px;
}

.grid.cols-3{
  grid-template-columns:repeat(3, minmax(0, 1fr));
}

.muted{color:var(--muted)}

.h1{
  font-size:22px;
  margin:0 0 6px;
}

.h2{
  font-size:16px;
  margin:0 0 6px;
}

.row{
  display:flex;
  gap:12px;
  align-items:center;
  flex-wrap:wrap;
}

.pill{
  padding:6px 10px;
  border-radius:999px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.04);
  font-size:13px;
  color:var(--muted);
}

.form{
  display:grid;
  gap:12px;
  max-width:520px;
}

label{
  font-size:14px;
  color:var(--muted);
}

input, select{
  width:100%;
  padding:12px 12px;
  border-radius:12px;
  border:1px solid var(--border);
  background:rgba(0,0,0,.18);
  color:var(--text);
  outline:none;
}

input:focus, select:focus{
  border-color:rgba(110,168,254,.55);
}

.error{
  border:1px solid rgba(255,100,100,.4);
  background:rgba(255,100,100,.08);
  padding:10px 12px;
  border-radius:12px;
}

.mobile-menu-btn{display:none}

@media (max-width: 900px){
  .shell{grid-template-columns:1fr}
  .sidebar{display:none}
  .mobile-menu-btn{display:inline-flex}
  .sidebar.mobile-open{
    display:block;
    position:fixed;
    top:58px;
    left:0;
    right:0;
    background:rgba(11,18,32,.98);
    backdrop-filter: blur(8px);
    border-right:none;
    border-bottom:1px solid var(--border);
  }
}