@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700&display=swap');
:root {
  --bg: #0a0a23;
  --card: #13133b;
  --text: #ffffff;
  --muted: #bfc3ff;
  --primary: #ff4ecd;
  --accent: #00f0ff;
  --success: #2ee6a6;
  --warning: #ffd166;
  --danger: #ff6b6b;
}
* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100vh; display: grid; place-items: center;
  background: radial-gradient(1200px 600px at 10% 10%, #1b1b5a, transparent),
              radial-gradient(1000px 800px at 90% 20%, #0d3b66, transparent),
              linear-gradient(120deg, #2d1e6b, #0a0a23);
  color: var(--text);
  font-family: 'Poppins', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}
.card {
  width: min(960px, 95vw);
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 18px; padding: 28px 22px 20px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.35), inset 0 0 60px rgba(255,255,255,0.05);
}
.hero { text-align: center; }
.hero h1 { margin: 0 0 6px; font-size: clamp(1.6rem, 2.5vw, 2.2rem); letter-spacing: .5px; }
.subtitle { margin: 0 0 18px; color: var(--muted); text-align: center; }
.panel { margin-top: 20px; }
.hidden { display: none; }
.label { color: var(--muted); font-size: .95rem; margin: 8px 0 6px; display: block; }
.row { display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: center; }
.input { padding: 12px 14px; border-radius: 12px; border: 1px solid rgba(255,255,255,.25); background: rgba(0,0,0,.25); color: var(--text); outline: none; }
.input::placeholder { color: #9aa3ff; }
.btn { border: 0; padding: 12px 16px; border-radius: 12px; font-weight: 700; cursor: pointer; transition: transform .08s ease, filter .2s; }
.btn:hover { transform: translateY(-1px); filter: brightness(1.05); }
.btn:active { transform: translateY(0); }
.primary { background: linear-gradient(180deg, var(--accent), #3bc6ff); color: #082b2b; }
.success { background: linear-gradient(180deg, var(--success), #13c28c); color: #082b2b; }
.status { margin-top: 22px; text-align: center; color: #f1f1f9; font-weight: 600; }
.code-wrap { margin-top: 14px; text-align: center; }
.pair-code { display: inline-block; font-weight: 800; letter-spacing: 6px; font-size: clamp(1.4rem, 3.5vw, 2.2rem); padding: 14px 16px; border-radius: 14px; border: 2px solid rgba(255,255,255,.25); background: rgba(0,0,0,.25); }

/* Confetti canvas overlay */
.confetti { position: fixed; inset: 0; pointer-events: none; }