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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: #333;
}

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

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

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.subtitle {
    font-size: 1.1em;
    opacity: 0.9;
}

.wallet-section, .info-section, .approve-section, .history-section {
    margin-bottom: 20px;
}

.status-card {
    background: white;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 15px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    gap: 15px;
}

.status-icon {
    font-size: 2em;
}

.status-text {
    font-size: 1.1em;
    font-weight: 500;
}

.info-card, .action-card, .history-card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.info-card h3, .action-card h3, .history-card h3 {
    margin-bottom: 20px;
    color: #667eea;
    font-size: 1.5em;
}

.info-item {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid #f0f0f0;
}

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

.label {
    font-weight: 500;
    color: #666;
}

.value {
    color: #333;
    word-break: break-all;
    text-align: right;
    max-width: 60%;
}

.btn {
    width: 100%;
    padding: 14px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 15px;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(102, 126, 234, 0.4);
}

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

.btn-secondary:hover {
    background: #e0e0e0;
}

.btn-success {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: white;
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(17, 153, 142, 0.4);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.description {
    color: #666;
    line-height: 1.6;
    margin-bottom: 15px;
}

.warning-box {
    background: #fff3cd;
    border: 1px solid #ffc107;
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 20px;
    color: #856404;
}

.status-message {
    margin-top: 15px;
    padding: 12px;
    border-radius: 8px;
    display: none;
}

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

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

.status-message.info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
    display: block;
}

.history-list {
    max-height: 400px;
    overflow-y: auto;
}

.history-item {
    padding: 15px;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    margin-bottom: 10px;
    background: #f9f9f9;
}

.history-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.history-status {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.85em;
    font-weight: 600;
}

.history-status.pending {
    background: #fff3cd;
    color: #856404;
}

.history-status.collected {
    background: #d4edda;
    color: #155724;
}

.history-detail {
    font-size: 0.9em;
    color: #666;
    word-break: break-all;
}

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

.empty {
    text-align: center;
    padding: 40px;
    color: #999;
}

@media (max-width: 600px) {
    header h1 {
        font-size: 2em;
    }
    
    .info-item {
        flex-direction: column;
        gap: 5px;
    }
    
    .value {
        max-width: 100%;
        text-align: left;
    }
}