:root {
  --primary: #1a56db;
  --primary-dark: #1446b8;
  --bg: #f1f5f9;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --success: #059669;
  --danger: #dc2626;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
}

.hidden {
  display: none !important;
}

.screen {
  max-width: 480px;
  margin: 0 auto;
  padding: 16px;
  padding-bottom: 32px;
}

.card {
  background: var(--card);
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 12px;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.08);
}

.setup-card {
  margin-top: 12vh;
  text-align: center;
}

.logo {
  width: 56px;
  height: 56px;
  margin: 0 auto 12px;
  border-radius: 16px;
  background: var(--primary);
  color: #fff;
  font-size: 28px;
  font-weight: 700;
  line-height: 56px;
}

h1 {
  margin: 0 0 8px;
  font-size: 1.5rem;
}

.muted {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0 0 16px;
}

.field {
  display: block;
  text-align: left;
  margin-bottom: 12px;
}

.field span {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 6px;
}

.field input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  font-size: 1rem;
}

.row {
  display: flex;
  gap: 8px;
}

.row input {
  flex: 1;
}

.btn {
  border: none;
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  width: 100%;
}

.btn-primary:active {
  background: var(--primary-dark);
}

.btn-secondary {
  background: #e2e8f0;
  color: var(--text);
  white-space: nowrap;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  width: 100%;
  margin-top: 8px;
}

.btn-lg {
  margin-top: 4px;
  padding: 14px;
}

.btn-icon {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 10px;
  width: 40px;
  height: 40px;
  font-size: 1.1rem;
  cursor: pointer;
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 12px;
}

.eyebrow {
  margin: 0;
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.topbar h1 {
  font-size: 1.25rem;
}

.client-card .client-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
}

.client-name {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 700;
}

.tier-badge {
  background: #dbeafe;
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
}

.balance-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  font-size: 1rem;
}

.balance-row strong {
  font-size: 1.4rem;
  color: var(--primary);
}

.error,
.error-banner {
  color: var(--danger);
  font-size: 0.9rem;
}

.error-banner {
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: 10px;
  padding: 10px 12px;
  margin-bottom: 12px;
}

.toast {
  position: sticky;
  top: 8px;
  z-index: 10;
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  color: #065f46;
  border-radius: 10px;
  padding: 10px 12px;
  margin-bottom: 12px;
  font-size: 0.9rem;
}

.result-card {
  text-align: center;
}

.result-title {
  margin: 0 0 8px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--success);
}

.result-text {
  margin: 0 0 16px;
  color: var(--muted);
  line-height: 1.5;
}

#qr-reader {
  border-radius: 12px;
  overflow: hidden;
}

#qr-reader video {
  border-radius: 12px;
}