*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: Arial, sans-serif;
  background: #f0f4f8;
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 24px 12px;
}

.container {
  width: 100%;
  max-width: 420px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.10);
  padding: 28px 24px;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  justify-content: center;
}
.logo-symbol { font-size: 1.8rem; color: #2e7d32; font-weight: bold; }
.logo-text   { font-size: 1.2rem; font-weight: bold; color: #1b5e20; letter-spacing: 1px; }

/* Headings */
h1 { text-align: center; font-size: 1.2rem; color: #222; margin-bottom: 18px; }

/* Config form */
#merchant-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
label { font-size: 0.85rem; color: #555; }
input[type="text"], input[type="number"] {
  padding: 9px 10px;
  font-size: 1rem;
  border: 1px solid #ccc;
  border-radius: 6px;
  width: 100%;
}
input:focus { outline: none; border-color: #2e7d32; }

button {
  padding: 10px;
  font-size: 1rem;
  background: #2e7d32;
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s;
}
button:hover { background: #388e3c; }

.hint { font-size: 0.8rem; color: #888; margin-top: 12px; margin-bottom: 4px; }

.link-box {
  background: #f5f5f5;
  border: 1px solid #ddd;
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 0.8rem;
  word-break: break-all;
  color: #333;
  margin-bottom: 8px;
}

/* Amount badge */
.amount-badge {
  text-align: center;
  font-size: 2rem;
  font-weight: bold;
  color: #2e7d32;
  margin-bottom: 16px;
  letter-spacing: 1px;
}

/* QR */
#qr-section { text-align: center; margin-bottom: 16px; }
#qrcode svg { border-radius: 8px; border: 6px solid #fff; box-shadow: 0 0 0 1px #e0e0e0; }
.address-text {
  font-size: 0.72rem;
  color: #888;
  word-break: break-all;
  margin-top: 8px;
  padding: 0 4px;
}

/* Status box */
.status-box {
  border-radius: 10px;
  padding: 16px 12px;
  text-align: center;
  transition: background 0.4s, border-color 0.4s;
  border: 2px solid transparent;
}
.status-waiting  { background: #f3f6ff; border-color: #90caf9; }
.status-detected { background: #fff8e1; border-color: #ffd54f; }
.status-confirmed{ background: #e8f5e9; border-color: #66bb6a; }
.status-expired  { background: #fce4ec; border-color: #ef9a9a; }

.status-icon { margin-bottom: 8px; }

/* Spinner */
.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid #bbdefb;
  border-top-color: #1976d2;
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Checkmark */
.checkmark {
  width: 44px;
  height: 44px;
  background: #43a047;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: #fff;
  animation: pop 0.3s ease;
}
@keyframes pop {
  0%   { transform: scale(0.5); opacity: 0; }
  80%  { transform: scale(1.15); }
  100% { transform: scale(1); opacity: 1; }
}

/* Crossmark */
.crossmark {
  width: 44px;
  height: 44px;
  background: #e53935;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: #fff;
}

#status-text {
  font-size: 1rem;
  font-weight: bold;
  color: #333;
  margin-bottom: 6px;
}

/* Countdown */
.countdown {
  font-size: 0.82rem;
  color: #999;
  margin-top: 4px;
}

/* TX ID */
.txid-box {
  margin-top: 12px;
  background: #f5f5f5;
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 0.75rem;
  word-break: break-all;
  color: #555;
}
.txid-box .hint { display: inline; margin: 0; color: #888; }

/* Copy btn */
#copy-link-btn {
  width: 100%;
  margin-top: 4px;
  background: #1565c0;
}
#copy-link-btn:hover { background: #1976d2; }

/* Tab bar */
.tab-bar {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.tab-btn {
  flex: 1;
  padding: 8px 4px;
  font-size: 0.78rem;
  background: #e8f5e9;
  color: #2e7d32;
  border: 1px solid #c8e6c9;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.18s, color 0.18s;
  white-space: nowrap;
}
.tab-btn:hover { background: #c8e6c9; }
.tab-btn.active {
  background: #2e7d32;
  color: #fff;
  border-color: #2e7d32;
}

/* Tab panels */
.tab-panel { margin-bottom: 16px; text-align: center; }

/* QR in tab panel */
#tab-qr #qrcode { display: flex; justify-content: center; margin-bottom: 8px; }
#tab-qr .address-text { font-size: 0.72rem; color: #888; word-break: break-all; margin-bottom: 6px; }

/* WDExperience tab */
.tab-desc {
  font-size: 0.88rem;
  color: #444;
  margin-bottom: 14px;
  text-align: left;
  line-height: 1.5;
}
.pay-btn {
  display: inline-block;
  padding: 12px 24px;
  background: #1565c0;
  color: #fff;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: bold;
  text-decoration: none;
  transition: background 0.2s;
}
.pay-btn:hover { background: #1976d2; }

/* Copy rows */
.copy-row {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #f5f5f5;
  border: 1px solid #e0e0e0;
  border-radius: 6px;
  padding: 8px 10px;
  margin-bottom: 8px;
  text-align: left;
}
.copy-label {
  font-size: 0.78rem;
  color: #888;
  min-width: 50px;
}
.copy-value {
  flex: 1;
  font-size: 0.78rem;
  color: #333;
  word-break: break-all;
  font-family: monospace;
}
.copy-btn {
  padding: 5px 10px;
  font-size: 0.78rem;
  background: #1565c0;
  border-radius: 5px;
  white-space: nowrap;
  flex-shrink: 0;
}
.copy-btn:hover { background: #1976d2; }

/* Steps list */
.steps {
  text-align: left;
  padding-left: 20px;
  margin-top: 12px;
  color: #444;
  font-size: 0.85rem;
  line-height: 1.7;
}
.steps a { color: #1565c0; }