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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

.screen {
    animation: fadeIn 0.3s ease-in;
}

.hidden {
    display: none !important;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Main screen */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.header h1 {
    color: white;
    font-size: 2.5em;
}

.logout-btn {
    padding: 12px 24px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid white;
    border-radius: 10px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s;
}

.logout-btn:hover {
    background: white;
    color: #667eea;
}

/* User info */
.user-info {
    background: white;
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    margin-bottom: 30px;
}

.user-info h2 {
    color: #333;
    margin-bottom: 20px;
}

.balance-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    color: white;
}

.balance-label {
    font-size: 16px;
    opacity: 0.9;
    margin-bottom: 10px;
}

.balance-amount {
    font-size: 3em;
    font-weight: bold;
}

.balance-update {
    animation: pulse 0.5s ease-in-out;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

/* Actions */
.actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.action-card {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.action-card h3 {
    color: #333;
    margin-bottom: 20px;
}

.action-card input {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
}

 .action-card input:focus {
     outline: none;
     border-color: #667eea;
 }

 .action-card button {
     width: 100%;
     padding: 12px;
     margin-top: 10px;
     border: none;
     border-radius: 8px;
     font-size: 16px;
     font-weight: bold;
     cursor: pointer;
     transition: all 0.3s;
    }

.secondary-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-top: 20px;
}

.secondary-btn {
    padding: 15px 20px;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
    color: green;
}

.secondary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.deposit-btn {
    background: #4caf50;
    color: white;
}

.deposit-btn:hover {
    background: #45a049;
    transform: translateY(-2px);
}

.withdraw-btn {
    background: #f44336;
    color: white;
}

.withdraw-btn:hover {
    background: #da190b;
    transform: translateY(-2px);
}

/* Transactions */
.transactions {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.transactions h3 {
    color: #333;
    margin-bottom: 20px;
}

.transactions-list {
    max-height: 500px;
    overflow-y: auto;
}

.transaction-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    margin: 10px 0;
    border-radius: 10px;
    background: #f8f9fa;
    transition: transform 0.2s;
}

.transaction-item:hover {
    transform: translateX(5px);
}

.transaction-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.transaction-icon {
    font-size: 24px;
}

.transaction-description {
    font-weight: bold;
    color: #333;
    margin-bottom: 5px;
}

.transaction-date {
    font-size: 12px;
    color: #666;
}

.transaction-amount {
    font-size: 18px;
    font-weight: bold;
}

.transaction-amount.deposit {
    color: #4caf50;
}

.transaction-amount.withdraw {
    color: #f44336;
}

.empty, .loading, .error {
    text-align: center;
    padding: 20px;
    color: #666;
}

.modal {
    display: none; 
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5); 
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: white;
    border-radius: 20px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    border-bottom: 1px solid #e0e0e0;
}

.modal-header h2 {
    margin: 0;
    color: #333;
    font-size: 1.5em;
}

.close-btn {
    background: none;
    border: none;
    font-size: 30px;
    color: #999;
    cursor: pointer;
    padding: 0;
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s;
}

.close-btn:hover {
    background: #f0f0f0;
    color: #333;
}

.modal-body {
    padding: 25px;
}

/* Notifications */
.notification {
    position: fixed;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    padding: 15px 30px;
    border-radius: 10px;
    color: white;
    font-weight: bold;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: top 0.3s ease-in-out;
    z-index: 1000;
}

.notification.show {
    top: 20px;
}

.notification.success {
    background: #4caf50;
}

.notification.error {
    background: #f44336;
}

.notification.info {
    background: #2196f3;
}

@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

  .header h1 {
      font-size: 1.8em;
  }

  .actions {
      grid-template-columns: 1fr;
  }

  .balance-amount {
      font-size: 2.5em;
  }
}

.modal-body {
    padding: 25px;
}

.modal-body input {
    width: 100%;
    padding: 15px;
    margin: 10px 0;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    box-sizing: border-box;
}

.modal-body input:focus {
    outline: none;
    border-color: #4caf50;
}

.modal-body button {
    width: 100%;
    padding: 15px;
    margin-top: 10px;
    border: none;
    border-radius: 8px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
}

.modal-content {
    min-width: 400px; 
}

@media (max-width: 768px) {
    .modal-content {
        min-width: auto;
        width: 95%;
    }
}