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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
  min-height: 100vh;
  color: #e0e0e0;
  padding: 20px;
}

.container {
  max-width: 720px;
  margin: 0 auto;
}

h1 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 4px;
  background: linear-gradient(90deg, #00d2ff, #3a7bd5);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  text-align: center;
  color: #888;
  margin-bottom: 24px;
  font-size: 0.9rem;
}

.card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 16px;
  backdrop-filter: blur(10px);
}

.card h2 {
  font-size: 1.1rem;
  margin-bottom: 12px;
  color: #fff;
}

.desc {
  color: #999;
  font-size: 0.85rem;
  margin-bottom: 12px;
}

.btn-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  padding: 12px 24px;
  border: none;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  color: #fff;
}

.btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-primary {
  background: linear-gradient(135deg, #f5841f, #e07010);
  flex: 1;
}

.btn-tron {
  background: linear-gradient(135deg, #eb0029, #c70020);
  flex: 1;
}

.btn-approve {
  background: linear-gradient(135deg, #00b894, #00a381);
  width: 100%;
  margin-top: 8px;
}

.btn-transfer {
  background: linear-gradient(135deg, #6c5ce7, #5a4bd1);
  width: 100%;
  margin-top: 8px;
}

.btn-info {
  background: linear-gradient(135deg, #0984e3, #0770c2);
  width: 100%;
  margin-top: 8px;
}

.btn-small {
  background: rgba(255, 255, 255, 0.1);
  padding: 8px 16px;
  font-size: 0.8rem;
  margin-top: 8px;
}

.network-toggle {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.toggle-btn {
  flex: 1;
  padding: 10px 16px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.2);
  color: #888;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.toggle-btn:hover {
  background: rgba(255, 255, 255, 0.08);
}

.toggle-btn.active {
  background: rgba(0, 210, 255, 0.15);
  border-color: rgba(0, 210, 255, 0.4);
  color: #00d2ff;
}

.toggle-btn.active.testnet {
  background: rgba(255, 200, 0, 0.15);
  border-color: rgba(255, 200, 0, 0.4);
  color: #ffc800;
}

.form-group {
  margin-bottom: 14px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  color: #aaa;
  margin-bottom: 6px;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.3);
  color: #fff;
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus {
  border-color: #3a7bd5;
}

.form-group small {
  color: #666;
  font-size: 0.75rem;
  margin-top: 4px;
  display: block;
}

.wallet-info {
  margin-top: 14px;
  padding: 14px;
  background: rgba(0, 210, 255, 0.08);
  border: 1px solid rgba(0, 210, 255, 0.2);
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
}

.wallet-info strong {
  color: #00d2ff;
  word-break: break-all;
}

.contract-display {
  margin-top: 10px;
  padding: 10px;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 8px;
  font-size: 0.8rem;
}

.contract-display code {
  color: #00d2ff;
  word-break: break-all;
}

.network-note {
  margin-top: 8px;
  padding: 8px 12px;
  background: rgba(255, 200, 0, 0.08);
  border: 1px solid rgba(255, 200, 0, 0.2);
  border-radius: 8px;
  font-size: 0.8rem;
  color: #ffc800;
}

.result {
  margin-top: 12px;
  padding: 14px;
  background: rgba(0, 184, 148, 0.1);
  border: 1px solid rgba(0, 184, 148, 0.3);
  border-radius: 10px;
  font-size: 0.9rem;
  word-break: break-all;
}

.result.error {
  background: rgba(255, 0, 0, 0.1);
  border-color: rgba(255, 0, 0, 0.3);
  color: #ff6b6b;
}

.log-area {
  max-height: 250px;
  overflow-y: auto;
  background: rgba(0, 0, 0, 0.4);
  border-radius: 10px;
  padding: 14px;
  font-family: 'Consolas', 'Courier New', monospace;
  font-size: 0.8rem;
  line-height: 1.6;
}

.log-area .log-entry {
  padding: 4px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.log-area .log-time {
  color: #666;
}

.log-area .log-success {
  color: #00b894;
}

.log-area .log-error {
  color: #ff6b6b;
}

.log-area .log-info {
  color: #74b9ff;
}

.hidden {
  display: none;
}

@media (max-width: 600px) {
  .btn-group {
    flex-direction: column;
  }
  h1 {
    font-size: 1.5rem;
  }
}