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10px;border-radius:4px;color:#fff;font-size:12px;font-weight:600;text-transform:uppercase}.notification-time{margin-left:auto;font-size:12px;color:#999}.notification-body{font-size:14px;color:#555}.notification-body p{margin:8px 0}.notification-value{font-weight:600;color:#333}.notification-meta{font-size:12px;color:#999;font-style:italic}.notification-range{font-size:12px;color:#666}.empty-state{text-align:center;padding:40px;color:#999;font-size:16px}.error-banner{background-color:#f8d7da;border:1px solid #f5c6cb;color:#721c24;padding:12px;border-radius:4px;margin-bottom:20px}.loading{text-align:center;padding:40px;color:#666;font-size:16px}.app-loading{display:flex;justify-content:center;align-items:center;min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;font-size:18px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica 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