:root {
  --bg: #0f1115;
  --card: #1c1f26;
  --text: #e8eaed;
  --sub: #9aa0a6;
  --primary: #8ab4f8;
}

* {
  box-sizing: border-box;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.card {
  width: 100%;
  max-width: 420px;
  background: var(--card);
  border-radius: 20px;
  padding: 26px 22px 30px;
  box-shadow: 0 12px 32px rgba(0,0,0,0.4);
}

.header {
  text-align: center;
  margin-bottom: 18px;
}

.title {
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
}

.subtitle {
  font-size: 14px;
  color: var(--sub);
  word-break: break-all;
}

input {
  width: 100%;
  background: #111318;
  color: var(--text);
  font-size: 22px;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid #2a2d34;
  outline: none;
}

input:focus {
  border-color: var(--primary);
}

input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
  -webkit-appearance: none;
}

button {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
}

.generate {
  margin-top: 18px;
  background: var(--primary);
  color: #0f1115;
}

.share {
  margin-top: 12px;
  background: #2a2d34;
  color: var(--text);
  display: none;
}

.qr-area {
  margin-top: 24px;
  display: none;
  text-align: center;
}

.qr-box {
  display: inline-block;
  padding: 12px;
  background: #ffffff;
  border-radius: 14px;
}

.scan-text {
  margin-top: 10px;
  font-size: 13px;
  color: var(--sub);
}