:root{
  --cw-bg:#f5f7fb;
  --cw-card:#ffffff;
  --cw-text:#0f172a;
  --cw-muted:#64748b;
  --cw-primary:#2563eb;
  --cw-preview:#0b1220;
}

body{
  background:var(--cw-bg);
  color:var(--cw-text);
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif;
}

.cw-header{
  background:linear-gradient(180deg, rgba(255,255,255,1) 0%, rgba(245,247,251,1) 100%);
  border-bottom:1px solid rgba(15,23,42,.06);
}

.cw-mark{
  width:42px;
  height:42px;
  border-radius:14px;
  display:grid;
  place-items:center;
  color:#fff;
  font-weight:800;
  letter-spacing:.02em;
  background:linear-gradient(135deg,#2563eb,#1d4ed8);
  box-shadow:0 10px 30px rgba(37,99,235,.25);
}

.cw-card{
  border:1px solid rgba(15,23,42,.08);
  border-radius:18px;
  box-shadow:0 14px 45px rgba(15,23,42,.08);
}

.cw-pills{
  gap:.5rem;
}

.cw-pills .nav-link{
  display:flex;
  align-items:center;
  gap:.5rem;
  border-radius:14px;
  padding:.55rem .8rem;
  color:rgba(15,23,42,.75);
  background:rgba(15,23,42,.03);
  border:1px solid rgba(15,23,42,.06);
}

.cw-pills .nav-link i{
  font-size:1.1rem;
}

.cw-pills .nav-link.active{
  color:#fff;
  background:linear-gradient(135deg,#2563eb,#1d4ed8);
  border-color:transparent;
  box-shadow:0 12px 28px rgba(37,99,235,.25);
}

.cw-hint-card{
  border:1px dashed rgba(15,23,42,.18);
  border-radius:16px;
  padding:1rem;
  background:rgba(255,255,255,.7);
}

.cw-preview-card{
  border-radius:18px;
  border:1px solid rgba(255,255,255,.06);
  background:radial-gradient(1200px 500px at 10% 10%, rgba(37,99,235,.25), transparent 55%),
             radial-gradient(900px 400px at 90% 20%, rgba(16,185,129,.18), transparent 50%),
             linear-gradient(180deg, #0b1220 0%, #070d18 100%);
  box-shadow:0 18px 60px rgba(2,6,23,.35);
}

.cw-qr-stage{
  flex:1;
}

.cw-qr-surface{
  position:relative;
  border-radius:18px;
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.08);
  min-height:320px;
  display:grid;
  place-items:center;
  overflow:hidden;
}

.cw-qr-image{
  width:100%;
  max-width:360px;
  height:auto;
  background:#fff;
  border-radius:14px;
  padding:.75rem;
  box-shadow:0 18px 50px rgba(0,0,0,.35);
  transform:translateZ(0);
  transition:opacity .18s ease, transform .18s ease;
}

.cw-qr-image.cw-updating{
  opacity:.55;
  transform:scale(.985);
}

.cw-qr-placeholder{
  text-align:center;
  padding:2rem;
  color:#fff;
}

.cw-qr-loader{
  position:absolute;
  inset:0;
  display:grid;
  place-items:center;
  background:rgba(0,0,0,.25);
  backdrop-filter:blur(3px);
}

.cw-inline-card{
  border-radius:16px;
  padding:1rem;
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.08);
}

.form-control, .form-select{
  border-radius:14px;
}

@media (max-width: 991.98px){
  .cw-qr-surface{min-height:280px;}
  .cw-qr-image{max-width:320px;}
}