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

body {
  font-family: Arial, Helvetica, sans-serif;
  background: #0b1220;
  color: #f3f4f6;
  min-height: 100vh;
}

header {
  text-align: center;
  padding: 45px 20px 25px;
}

header h1 {
  font-size: 36px;
  margin-bottom: 10px;
}

header p {
  color: #9ca3af;
  font-size: 16px;
}

main {
  width: 90%;
  max-width: 700px;
  margin: 0 auto;
  padding-bottom: 40px;
}

.card {
  background: #111827;
  border: 1px solid #253047;
  border-radius: 16px;
  padding: 25px;
  margin-bottom: 20px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
}

.card h2 {
  margin-bottom: 15px;
  font-size: 22px;
}

.card p {
  color: #d1d5db;
  line-height: 1.6;
  margin-bottom: 12px;
}

button {
  width: 100%;
  padding: 15px;
  margin: 18px 0;
  border: none;
  border-radius: 10px;
  background: #2563eb;
  color: white;
  font-size: 17px;
  font-weight: bold;
  cursor: pointer;
}

button:hover:not(:disabled) {
  background: #1d4ed8;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

#walletInfo {
  background: #0f172a;
  border-radius: 10px;
  padding: 15px;
  margin-top: 10px;
}

#walletAddress,
.wallet-target {
  display: block;
  margin-top: 6px;
  word-break: break-all;
  color: #93c5fd;
}

.transfer-card label {
  display: block;
  margin: 18px 0 8px;
  color: #e5e7eb;
  font-weight: bold;
}

.transfer-card input {
  width: 100%;
  padding: 14px;
  border: 1px solid #334155;
  border-radius: 10px;
  background: #0f172a;
  color: #f8fafc;
  font-size: 17px;
  outline: none;
}

.transfer-card input:focus {
  border-color: #60a5fa;
}

.transfer-card input:disabled {
  opacity: 0.55;
}

.transfer-status {
  min-height: 24px;
  word-break: break-word;
}

.transfer-note {
  font-size: 14px;
  color: #94a3b8 !important;
}

.warning {
  border: 1px solid #f59e0b;
}

.warning h2 {
  color: #fbbf24;
}

footer {
  text-align: center;
  padding: 25px;
  color: #6b7280;
  font-size: 14px;
}

@media (max-width: 600px) {
  header h1 {
    font-size: 28px;
  }

  .card {
    padding: 20px;
  }
}