* {
    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;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
    background: rgba(255, 255, 255, 0.95);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

header h1 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 10px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

header p {
    font-size: 1.1rem;
    color: #7f8c8d;
}

.wallet-section {
    margin-bottom: 30px;
    text-align: center;
}

.wallet-info {
    background: rgba(255, 255, 255, 0.9);
    padding: 15px;
    border-radius: 10px;
    margin-top: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.contract-section {
    margin-bottom: 30px;
}

.contract-config {
    background: rgba(255, 255, 255, 0.95);
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.contract-config h3 {
    margin-bottom: 20px;
    color: #2c3e50;
    font-size: 1.4rem;
}

.main-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
}

.section {
    background: rgba(255, 255, 255, 0.95);
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease;
}

.section:hover {
    transform: translateY(-5px);
}

.section h2 {
    margin-bottom: 20px;
    color: #2c3e50;
    font-size: 1.4rem;
    border-bottom: 2px solid #3498db;
    padding-bottom: 10px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.input-field {
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
}

.input-field:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-weight: 500;
}

.checkbox-group input[type="checkbox"] {
    margin-right: 8px;
    transform: scale(1.2);
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: linear-gradient(45deg, #3498db, #2980b9);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(45deg, #2980b9, #3498db);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.4);
}

.btn-secondary {
    background: linear-gradient(45deg, #95a5a6, #7f8c8d);
    color: white;
}

.btn-secondary:hover {
    background: linear-gradient(45deg, #7f8c8d, #95a5a6);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(149, 165, 166, 0.4);
}

.btn-warning {
    background: linear-gradient(45deg, #f39c12, #e67e22);
    color: white;
}

.btn-warning:hover {
    background: linear-gradient(45deg, #e67e22, #f39c12);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(243, 156, 18, 0.4);
}

.result-box {
    margin-top: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid #3498db;
    min-height: 50px;
}

.product-list {
    margin-top: 20px;
    max-height: 300px;
    overflow-y: auto;
}

.product-item {
    background: #f8f9fa;
    padding: 15px;
    margin-bottom: 10px;
    border-radius: 8px;
    border-left: 4px solid #27ae60;
}

.product-item h4 {
    color: #2c3e50;
    margin-bottom: 5px;
}

.product-item p {
    color: #7f8c8d;
    font-size: 0.9rem;
}

.status-info {
    margin-top: 15px;
    padding: 10px;
    border-radius: 6px;
    font-weight: 500;
}

.status-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.status-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.status-info.empty {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

.transaction-status {
    position: fixed;
    top: 20px;
    right: 20px;
    max-width: 300px;
    padding: 15px;
    border-radius: 8px;
    font-weight: 500;
    z-index: 1000;
    transform: translateX(100%);
    transition: transform 0.3s ease;
}

.transaction-status.show {
    transform: translateX(0);
}

.transaction-status.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.transaction-status.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.transaction-status.loading {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }

    .main-content {
        grid-template-columns: 1fr;
    }

    header h1 {
        font-size: 2rem;
    }

    .section {
        padding: 20px;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section {
    animation: fadeIn 0.6s ease-out;
}

.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}