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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #f5f5f5;
  color: #333;
  min-height: 100vh;
}

/* KakaoPay Theme Colors */
:root {
  --kakao-yellow: #FEE500;
  --kakao-brown: #3C1E1E;
  --kakao-dark: #191919;
  --kakao-gray: #999;
  --kakao-light: #F7F7F7;
  --success: #4CAF50;
  --error: #F44336;
  --info: #2196F3;
}

/* Login Page */
.login-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #FEE500 0%, #FFD700 100%);
}

.login-card {
  background: white;
  border-radius: 16px;
  padding: 40px;
  width: 380px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.1);
}

.login-logo {
  text-align: center;
  margin-bottom: 32px;
}

.login-logo h1 {
  font-size: 28px;
  color: var(--kakao-brown);
  font-weight: 700;
}

.login-logo p {
  color: var(--kakao-gray);
  margin-top: 8px;
  font-size: 14px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  color: #666;
  margin-bottom: 6px;
  font-weight: 500;
}

.form-group input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 15px;
  transition: border-color 0.2s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--kakao-yellow);
  box-shadow: 0 0 0 3px rgba(254, 229, 0, 0.2);
}

.btn {
  display: block;
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s;
}

.btn:hover { opacity: 0.9; }

.btn-kakao {
  background: var(--kakao-yellow);
  color: var(--kakao-brown);
}

.btn-secondary {
  background: #eee;
  color: #333;
  margin-top: 8px;
}

.btn-metamask {
  background: #F6851B;
  color: white;
}

.btn-small {
  width: auto;
  padding: 8px 16px;
  font-size: 13px;
  display: inline-block;
}

.error-msg {
  color: var(--error);
  font-size: 13px;
  margin-top: 8px;
  display: none;
}

/* Dashboard */
.dashboard {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
}

.dashboard-header {
  background: var(--kakao-yellow);
  padding: 20px 24px;
  border-radius: 16px;
  margin-bottom: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.dashboard-header h2 {
  color: var(--kakao-brown);
  font-size: 20px;
}

.dashboard-header .user-info {
  color: var(--kakao-brown);
  font-size: 14px;
}

.card {
  background: white;
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: 0 1px 8px rgba(0,0,0,0.06);
}

.card h3 {
  font-size: 16px;
  color: var(--kakao-brown);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid #eee;
}

.balance-display {
  font-size: 36px;
  font-weight: 700;
  color: var(--kakao-brown);
  text-align: center;
  padding: 20px;
}

.balance-display .currency {
  font-size: 18px;
  color: var(--kakao-gray);
}

.balance-actions {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

.balance-actions input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 14px;
}

.wallet-info {
  font-family: 'Courier New', monospace;
  font-size: 13px;
  word-break: break-all;
  background: var(--kakao-light);
  padding: 12px;
  border-radius: 8px;
  margin: 8px 0;
}

.cli-command {
  background: var(--kakao-dark);
  color: #0f0;
  padding: 16px;
  border-radius: 8px;
  font-family: 'Courier New', monospace;
  font-size: 13px;
  word-break: break-all;
  position: relative;
  margin: 8px 0;
}

.cli-command .copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(255,255,255,0.2);
  color: white;
  border: none;
  padding: 4px 10px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
}

.cli-command .copy-btn:hover {
  background: rgba(255,255,255,0.3);
}

.payment-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.payment-table th {
  text-align: left;
  padding: 8px 12px;
  background: var(--kakao-light);
  color: #666;
  font-weight: 500;
}

.payment-table td {
  padding: 8px 12px;
  border-bottom: 1px solid #f0f0f0;
}

.status-success { color: var(--success); font-weight: 600; }
.status-failed { color: var(--error); font-weight: 600; }
.status-pending { color: #FF9800; font-weight: 600; }

.tab-bar {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
}

.tab-bar button {
  padding: 8px 16px;
  border: none;
  background: #eee;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
}

.tab-bar button.active {
  background: var(--kakao-yellow);
  color: var(--kakao-brown);
}

.hidden { display: none; }

.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  padding: 12px 20px;
  border-radius: 8px;
  color: white;
  font-size: 14px;
  z-index: 1000;
  animation: slideIn 0.3s ease;
}

.toast.success { background: var(--success); }
.toast.error { background: var(--error); }
.toast.info { background: var(--info); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}