body { font-family: 'Inter', sans-serif; }
        .input-focus:focus { outline: none; border-color: #2563eb; box-shadow: 0 0 0 4px #dbeafe; }
        .loading-spinner {
            border: 3px solid #f3f3f3;
            border-top: 3px solid #2563eb;
            border-radius: 50%;
            width: 20px;
            height: 20px;
            animation: spin 1s linear infinite;
        }
        @keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }