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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    text-align: center;
    color: white;
    margin-bottom: 30px;
}

header h1 {
    font-size: 3em;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.2em;
    opacity: 0.9;
}

.card {
    background: white;
    border-radius: 10px;
    padding: 30px;
    margin-bottom: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.card h2 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.5em;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #555;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 500;
}

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

.btn-primary:hover {
    background: #5568d3;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-danger:hover {
    background: #c82333;
}

.link-text {
    margin-top: 15px;
    text-align: center;
    color: #666;
}

.link-text a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.link-text a:hover {
    text-decoration: underline;
}

.balance {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.balance-item {
    flex: 1;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 5px;
}

.balance-item .label {
    display: block;
    color: #666;
    font-size: 0.9em;
    margin-bottom: 5px;
}

.balance-item .value {
    display: block;
    font-size: 1.5em;
    font-weight: bold;
    color: #333;
}

.quote {
    padding: 20px;
    background: #f8f9fa;
    border-radius: 5px;
    margin-bottom: 20px;
    text-align: center;
}

.quote span {
    font-size: 2em;
    font-weight: bold;
    color: #667eea;
}

.history {
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: 20px;
}

.history-item {
    padding: 15px;
    border-bottom: 1px solid #e0e0e0;
}

.history-item:last-child {
    border-bottom: none;
}

.history-item .amount {
    font-weight: bold;
    color: #333;
}

.history-item .status {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 3px;
    font-size: 0.85em;
    margin-top: 5px;
}

.status.pending {
    background: #ffc107;
    color: #333;
}

.status.completed {
    background: #28a745;
    color: white;
}

.status.failed {
    background: #dc3545;
    color: white;
}

.message {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 20px;
    border-radius: 5px;
    color: white;
    font-weight: 500;
    display: none;
    z-index: 1000;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}

.message.success {
    background: #28a745;
    display: block;
}

.message.error {
    background: #dc3545;
    display: block;
}

.qr-code {
    text-align: center;
    margin: 20px 0;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 5px;
}

.qr-code img {
    max-width: 300px;
    margin-bottom: 10px;
}

.qr-code .copy-paste {
    word-break: break-all;
    font-size: 0.9em;
    color: #666;
    margin-top: 10px;
}

@media (max-width: 768px) {
    .balance {
        flex-direction: column;
    }
    
    header h1 {
        font-size: 2em;
    }
    
    .card {
        padding: 20px;
    }
}